Maytag Washer Dryer 16010061 User Manual

Customer Service

Washer

Service Manual

16010061

Compiled From

16008373, 16010199,

16010886 11/03

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INTRODUCTION

Eachmodelwillbecoveredseparatelyinasectionpertainingonlytoitscontrolsystem

andinternalcomponents. Becausethebasicstructureforallwashersisthesame, they

willbecoveredgenerallywithoutregardtomodel.

Model(s)coveredinthismanual:

MAH3000

Foradditionalinformationonmaterialcoveredinthismanual,includingsafetyissues,

contact:

Maytag Appliances Sales Company

240EdwardsStreet, S.E.

Cleveland, TN 37311

Phone: 423.472.3333

FAX: 423.478.6722

16008373-01

INTRODUCTION

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CONTENTS

INTRODUCTION ...........................................................................................................................................................i

CONTENTS.......................................................................................................................................................................ii

SECTION 1.

GENERAL INFORMATION......................................................................................................1-1

PRE-INSTALLATION REQUIREMENTS............................................................................................................ 1-1

UNCRATING ....................................................................................................................................................................... 1-1

INSTALLATION.................................................................................................................................................................. 1-2

GROUNDING POLARITY CHECKS...................................................................................................................... 1-4

SPECIFICATIONS............................................................................................................................................................. 1-4

WASHER CONTROLS................................................................................................................................................... 1-5

INPUT DEFINITIONS..................................................................................................................................................... 1-6

OUTPUT DEFINITIONS............................................................................................................................................... 1-8

CYCLE SEQUENCE DEFINITIONS................................................................................................................... 1-10

MISCELLANEOUS....................................................................................................................................................... 1-11

Door Latch Switch Monitoring.................................................................................................................... 1-11

Door Lock/Spin Control................................................................................................................................... 1-11

Redistribution ......................................................................................................................................................... 1-11

Push-To-Start Relay Operation.................................................................................................................... 1-12

CYCLE REVIEW............................................................................................................................................................. 1-13

GENERAL COMPONENT EXPLODED VIEW ............................................................................................ 1-14

SECTION 2. ELECTRICAL COMPONENTS & TESTING ..................................................................2-1

ELECTRICAL TEST EQUIPMENT........................................................................................................................ 2-1

ELECTRICAL TESTS ..................................................................................................................................................... 2-2

Grounded Components..................................................................................................................................... 2-2

Voltage Checks ......................................................................................................................................................... 2-2

Water Valve Test....................................................................................................................................................... 2-2

Wax Motor Check/Door Lock Mechanism............................................................................................ 2-2

Timer & Console Switches............................................................................................................................... 2-3

Timer Input Charts.................................................................................................................................................. 2-3

Machine Control....................................................................................................................................................... 2-5

DRIVE MOTOR................................................................................................................................................................... 2-7

MOTOR CONTROL BOARD ...................................................................................................................................... 2-7

Motor & Motor Control Test............................................................................................................................ 2-8

Motor Phase Test.................................................................................................................................................... 2-8

Motor Windings Check....................................................................................................................................... 2-9

Tachometer Circuit Diagnostics ................................................................................................ .............2-10

UNBALANCE CONTROL SYSTEM.................................................................................................................. 2-11

Tub Displacement Switch............................................................................................................................... 2-12

Strut Displacement Switch ............................................................................................................................ 2-12

Inertial Unbalance Switch............................................................................................................................... 2-13

Cabinet Vibration Sensor............................................................................................................................... 2-13

Cabinet Vibration Absorber ......................................................................................................................... 2-13

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SECTION 3.

TROUBLESHOOTING ................................................................................................................3-1

DIAGNOSTIC FLOW CHARTS....................................................................................................3-4

Fills and Will Not Tumble................................................................................................................................... 3-4

Washer Overfills....................................................................................................................................................... 3-5

Washer Will Not Spin ........................................................................................................................................... 3-6

Machine Stalls During Spin............................................................................................................................... 3-8

Maximum Spin Speed Is Not Reached ................................................................................................... 3-9

Wash Cycle Takes Longer Than Normal.............................................................................................. 3-10

Suds Coming Out Of Door............................................................................................................................. 3-10

Washer Will Not Start........................................................................................................................................ 3-11

Motor Phase Test................................................................................................................................................. 3-12

TIMER TEMPLATE OVERLAY ............................................................................................................................. 3-13

MISCELLANEOUS

INFORMATION.................................................................................................................. 3-14

SECTION 4. CONSOLE............................................................................................................................................4-1

REMOVAL............................................................................................................................................................................. 4-1

VERTICAL SWITCHES.................................................................................................................................................. 4-2

HORIZONTAL SWITCHES.......................................................................................................................................... 4-2

TIMER

REMOVAL/REPLACEMENT.................................................................................................................... 4-3

SECTION 5. CABINET ASSEMBLY.................................................................................................................5-1

DOOR ASSEMBLY & HINGES................................................................................................................................. 5-1

Cabinet Vibration Absorber ............................................................................................................................5-2

Door Latch Hoop..................................................................................................................................................... 5-2

FRONT PANEL................................................................................................................................................................... 5-2

TOP COVER......................................................................................................................................................................... 5-3

DOOR LOCK MECHANISM....................................................................................................................................... 5-3

FRONT SHROUD ASSEMBLY................................................................................................................................. 5-4

CABINET ASSEMBLY W/REAR ACCESS PANEL...................................................................................... 5-5

SECTION 6. WATER CARRYING COMPONENTS ................................................................................6-1

WATER VALVE................................................................................................................................................................... 6-1

WATER LEVEL PRESSURE SWITCH.................................................................................................................. 6-2

AIR DOME HOSE.............................................................................................................................................................. 6-2

DISPENSER ASSEMBLY............................................................................................................................................. 6-3

FRONT WATER FLUME INJECTOR..................................................................................................................... 6-4

PUMP ASSEMBLY..........................................................................................................................................................6-4

Pump Accessory..................................................................................................................................................... 6-5

DRAIN HOSE....................................................................................................................................................................... 6-6

SECTION 7. OUTER TUB & SPINNER ASSEMBLY ............................................................................7-1

BAFFLES................................................................................................................................................................................ 7-1

DOOR BOOT........................................................................................................................................................................ 7-1

OUTER TUB COVER...................................................................................................................................................... 7-2

SPIN BASKET ASSEMBLY W/BALANCE RING.......................................................................................... 7-3

DRIVE PULLEY.................................................................................................................................................................. 7-4

SPINNER TUB SUPPORT........................................................................................................................................... 7-5

iii

CONTENTS

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SEAL SYSTEM.................................................................................................................................................................. 7-6

OUTER TUB ASSEMBLY............................................................................................................................................ 7-7

BEARINGS............................................................................................................................................................................ 7-7

COUNTER WEIGHTS.................................................................................................................................................... 7-7

STRUT ASSEMBLY........................................................................................................................................................ 7-8

Strut Displacement Switch ............................................................................................................................... 7-8

INERTIAL UNBALANCE SWITCH......................................................................................................................... 7-8

TUB DISPLACEMENT SWITCH............................................................................................................................. 7-9

SECTION 8. MOTOR DRIVE SYSTEM ........................................................................................................8-1

DRIVE BELT ......................................................................................................................................................................... 8-1

DRIVE MOTOR................................................................................................................................................................... 8-1

MACHINE

CONTROL.................................................................................................................................................... 8-2

MOTOR CONTROL ......................................................................................................................................................... 8-3

SECTION 9. ELECTRICAL SCHEMATICS..................................................................................................9-1

Schematic Prior to Series 17 .......................................................................................................................... 9-1

Timer Chart Prior to Series 17....................................................................................................................... 9-2

Schematic Series 17.............................................................................................................................................. 9-3

Timer Chart Series 17.......................................................................................................................................... 9-4

Schematic Series 18.............................................................................................................................................. 9-5

Timer Chart Series 18.......................................................................................................................................... 9-6

Schematic Series 19.............................................................................................................................................. 9-7

16008373-01

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SECTION 1. GENERAL INFORMATION

PRE-INSTALLATION

REQUIREMENTS

NOTE: Proper installation is the responsibil-

ity of the purchaser.

cause an extended fill time. Refer to the

troubleshooting section for more infor-

mation regarding a solution for slow fill

situations.

Checkpoints for proper installation:

•

Properly grounded electrical outlet is re-

quired. Use 15 amp fuse or compatible

circuit breaker for electrical service.

•

Best performance is obtained with the

washer installed on a solid floor. Wood

floor constructions may need to be rein-

forced to minimize vibration from unbal-

anced load situations. Carpets and soft

tile surfaces are also contributing factors

to vibration and/or movement during the

spin cycle. Never install washer on a plat-

form or weak support structure.

Standpipe Drain System must accept 1½"

O.D. drain hose. Standpipe height of 36"

is recommended.

NOTE: If drain standpipe is in excess of 5 feet

above floor level, install pump accessory kit,

part number 22002136.

•

This unit is not equipped with a siphon

break, and the drain hose must be elevated

to a minimum height of 24". A 36" high

standpipe is recommended. For all instal-

lations the drain hose must be supported

by the drain hose strap on the back of the

washer.

UNCRATING INSTRUCTIONS

NOTE: The following steps must be per-

formed in the correct order to ease uncrating.

1. Remove the carton by cutting only in

marked areas of the carton. CAUTION:

Hoses are connected to the washer.

•

Hot and Cold water faucets must be within

four (4) feet of the back of the washer. This

allows quick access for immediate water

shut off.

2. Carefully remove any packaging materi-

als from the outside of the washer.

IMPORTANT: DO NOT cut the red straps

securing the power cord and inlet hoses

at this time. They will be removed later

during installation.

•

Water heater should be set to deliver a

minimum of 120ºF (49º C) hot water to the

washer.

3. Remove the accessory package from in-

side the tub.

Do not store or operate washer in tem-

peratures below freezing. This can cause

damage to the pump, hoses and other

components.

4. Remove the crate bottom from the washer

by removing crate bottom wire clips.

•

Water pressure of 20 - 120 P.S.I. is required

to fill the washer in the appropriate time

frame. Pressures of less than 20 P.S.I. may

1-1

16008373-01

SECTION 1. GENERAL INFORMATION

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INSTALLATION

1. Two separate red shipping straps are used

to secure the machine for shipping pur-

poses and to secure the power cord with

the water inlet hoses. Remove the straps

in the following sequence:

A. Locate the metal buckles securing the red

straps which extend through slots in the

rear wall of the cabinet. The buckles are

positioned in the center of the red straps.

Carefully cut the red straps, and remove

the metal buckles. NOTE: Cut the straps

as close to the buckles as possible. Dis-

card the buckles.

Figure 1-2

3. Locate the two (2) ½" hex head shipping

bolts extending up through the bottom of

the base (Figure 1-4). The shipping bolts

are near the center of the base toward the

front of the washer. Remove both bolts,

freeing the tub and suspension. Do not

be alarmed should the tub assembly shift

when the last bolt is removed. Some shift-

ing of the tub is normal.

Figure 1-1

Figure 1-3

B. Grasp each loose strap individually and

pull the strap to remove it from the cabi-

net. Discard the strap (Figure 1-2).

2. Tip washer slightly forward. Loosen rear

leveling leg lock nuts. Tip washer back

slightly to loosen front leveling leg lock

nuts (Figure 1-3).

16008373-01

SECTION 1. GENERAL INFORMATION

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1-2

Turn on the water and check for leaks (Figure

1-5). Note the H and C designations on the

water valve bracket for the Hot and Cold

hoses.

Figure 1-4

Figure 1-5

4. Slide the washer into position and check

the levelness and stability of the washer.

If necessary, slide the washer out of posi-

tion to either raise or lower the leveling

leg as required to level and stabilize the

washer securely on all four legs. Slide the

washer back into position to confirm lev-

elness to the floor. When the washer is

level, tighten the locking nuts up against

the base of the washer. This will secure

the leveling legs in place.

NOTE: Accessory inlet hoses are available in

various lengths, up to 10 feet.

GROUNDING POLARITY CHECKS

The receptacle used for all Maytag products

operating on 120 Volts AC must be properly

grounded and polarized.

The power cord should be equipped with a

three (3) PRONG POLARIZED GROUNDING

PLUG FOR PROTECTION AGAINST SHOCK

HAZARD and should be plugged directly into

a properly grounded and polarized receptacle.

CAUTION: Do not cut or remove the ground-

ing prong from this plug.

5. Install the rubber feet, found in the instal-

lation package, on all four (4) legs (Figure

1-3).

6. Pull the drain hose vertically to the drain

strap . Then route the drain hose through

the drain hose strap on the back of the

washer and snap into the plastic hook of

the strap.

It is the responsibility of the person installing

the appliance to ensure it is adequately

grounded and polarized at the point of instal-

lation. Local conditions and requirements

should be taken into consideration. In cases

where only a two (2) prong receptacle is avail-

able, it is the personal responsibility of the

customer to have it replaced with a properly

grounded and polarized three (3) prong recep-

tacle (Figure 1-6).

7. Install gooseneck end of drain hose into

drain standpipe. Be sure the connection

is not airtight between the drain hose and

standpipe. Standpipe must be at least 24"

high. 36" height is recommended.

8. Connect inlet hoses to water supply us-

ing screen washers (found in the installa-

tion package) at faucet connections, with

the domed screen facing the faucet. At-

tach hoses to the faucets and the water

valve.

1-3

16008373-01

SECTION 1. GENERAL INFORMATION

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Plug power cord into a properly grounded 120

volt AC-approved electrical service. This

must be protected by a dedicated 15 amp fuse

or circuit breaker.

All grounding and wiring should be performed

in accordance with national and local codes.

USE OF ADAPTERS IS NOT RECOMMENDED.

Figure 1-6

SPECIFICATIONS

CAPACITY

3.1 Cubic Feet

ELECTRICAL

120 volts, 60 Hz; Requires 15 amp circuit breaker or fused electrical

supply. Power cord must be connected to a properly grounded and

polarized outlet.

M OTOR

Switched Reluctance M otor controlled by a microprocessor motor

control board. Motor pulley ratio (motor to spinner RPM ) 14 to 1.

POWER USAGE

Motor Input:

During Wash Tumble

During Rinse Tum ble

Top Spin

- 150 Watts

- 175 Watts

- 800 Watts

(Wattage readings taken with no clothes in spinner.)

TUMBLER SPEED

WATER USAGE

Wash Tumble

Rinse Tum ble

High Speed Spin

47-51 RPM

800 RPM (± 50 RPM based upon optim um

spin performance.)

Water pressure should be 20-120 p.s.i. (1.06-8.44 kg/cm ) at inlet hose

connection. Total water usage is approximately 25 gallons; varies w ith

clothes load. Water fill in the spin basket with no clothes, m easured

near the rear seam of the spin basket.

WASH LEVEL

RINSE LEVEL

3-4 inches

4-5 inches

HOSE LENGTHS

Four-foot inlet hoses with inlet washers and attaches to water valve.

Drain hose attaches to pump and will accommodate 36" drain stand

pipe.

DIMENSIONS

Cabinet dimensions: 27" (68.58cm) W x 27 ½” (69.85cm) D x 36"

(91.44cm )H.

WEIGHT (Approx.)

SCREW & BOLT TORQU ES

Uncartoned

Crated

190lb. (86kg.) Approx.

200lb. (91kg). Approx.

Bolt, Counter Weight

Bolt, Spin Pulley

Bolt, Belt Adjuster

Screw , Front Baffle

Screw , Rear Baffle

Clamp, Hoses

7in. lbs.

(± 3in.lbs)

(± 3in. lbs)

(± 10in. lbs)

(± 3in. lbs)

30in. lbs

90in. lbs

25in. lbs

18.5in. lbs

15+ in. lbs

18in. lbs

7in. lbs

Nuts, Spinner Support

Nuts, Suspension Struts

(± 3in. lbs)

16008373-01

SECTION 1. GENERAL INFORMATION

1-4

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WASHER CONTROLS

The control system in the Neptune horizontal axis washer generally consists of a timer and

microprocessor-based machine control. These receive input signals and send output signals to

other equipment in the washer, including the motor and motor control, user input switches,

user indicator lights, the door latch and lock assembly, water valves, drain pump, unbalance

switches, dispenser actuator wax motors, a pressure switch, and a tub light.

The machine control has direct control of these items:

Motor speed and direction, through signals to the motor control.

Door lock wax motor.

Hot and cold water valves, with an input signal from the timer and pressure switch.

Timer motor.

On Light.

In general, the timer dial is rotated to a desired setting, selects the cycles options using the

option switches, and starts the washer. The machine control reads the inputs from the timer,

option switches and pressure switch then send output signals to the motor control and other

components based upon those inputs. When the machine control has completed its set of

instructions for the specific timer setting, it energizes the timer motor output to advance the

timer to the next increment, reads a new set of input signals from the timer, and acts upon

them. This continues until the cycle is complete. (See Figure 1-7 & 1-8 for a generic representa-

tion of the Neptune washer control system.)

Prior To Series 17

Figure 1-7

1-5

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SECTION 1. GENERAL INFORMATION

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Series 17 & Later

Figure 1-8

NOTE: If the user selects the Hand Washables

fabric selection, all spins will follow the Max

Extract profile regardless of whether the user

selects the Max Extract option.

INPUT DEFINITIONS

DOOR LOCK SWITCH INPUT

When input is present, this is indication the

washer door is locked. The machine control-

ler will not command the spinner to spin faster

than 50 rpm when the input is not present

prior to spin.

OUT-OF-BALANCE INPUT

The Out-of-Balance Input Signal is provided

by three normally-closed switches wired in

sequence. If any of these switches opens due

to an out-of-balance condition, the signal will

be momentarily lost (See Unbalance Control

System).

END-OF-CYCLE SIGNAL INPUT

The End-of-Cycle Signal Input is energized

through a user input switch on the control

panel. When this is energized and the cycle

has finished, the machine control will sound

the End-of-Cycle signal (See End-Of-Cycle Sig-

nal Output).

PRESSURE SWITCH INPUT

The input signal from the Pressure Switch

serves two purposes. It supplies power for

the water valves and provides an indication

to the machine control as to whether the com-

manded water level has been reached.

FABRIC SELECTION INPUTS

The Fabric Selection Inputs are energized

through a user input switch on the control

panel. The machine control reads these in-

puts to determine which cycles should be run

when the washer is started.

When the timer advances into a cycle se-

quence that calls for water, power is supplied

through the timer to either the wash or rinse

level contacts on the pressure switch. When

the water level in the tub is below the full level

for that setting, the pressure switch circuit is

closed, supplying power for the water valves

to the machine control. When the water level

switch is satisfied, the pressure switch circuit

is opened and power for the water valves is

no longer passed to the machine control. The

MAX EXTRACT INPUT

The Max Extract Input is energized through a

user input switch on the control panel. When

input is energized, the machine control will

modify the final spin profile to the max ex-

tract profile.

16008373-01

SECTION 1. GENERAL INFORMATION

1-6

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machine control interprets this loss of power

as an indication that the water level has

reached the full level.

TACH INPUT

The tach input is a feedback signal from the

motor control. It provides eight pulses per

revolution of the switched reluctance motor.

The motor runs at 14 times the speed of the

spinner (14:1 belt ratio). The tach input is used

for monitoring speed and out-of-balance de-

tection (See Tachometer Circuit Diagnostics).

When the washer is at the "full" level and the

timer is set in a Prewash Tumble, Main Wash

Tumble, Light Wash Tumble, or Rinse Tumble

increment, the machine control will begin the

sequence timing defined for each cycle and

fabric selection setting (See Cycle Sequence

Definitions).

If the machine control commands a motor

speed and direction but does not sense a tach

input signal within five seconds, it will disen-

gage the line relay to stop the washer. This

generally indicates a locked rotor or a mal-

function in the motor control.

During the drain and spin increments after the

main wash, first rinse, second rinse, and ex-

tra rinse increments, the wash side circuit in

the pressure switch is closed. When the wa-

ter level drains below the wash full level, the

circuit will close and energize the pressure

switch input. The machine control interprets

this signal (not to energize the water valve

outputs) to measure how quickly the washer

is draining. If the machine control commands

a spin speed above 51 rpm before the pres-

sure switch input is energized, it will drop the

speed to 0 rpm and hold there until the pres-

sure switch input is energized. An additional

delay equal to the length of time elapsed will

occur before the pressure switch input is en-

ergized. If four minutes elapse without the

pressure switch input being energized, the

machine control will energize the timer mo-

tor output to advance the timer into the next

increment and continue with the cycle.

If the machine control senses a tach input sig-

nal when it is not commanding the motor to

run, it will disengage the line relay to stop the

washer.

If the machine control commands a coast

down from final spin speed but is still receiv-

ing a tach input signal after two minutes, it

will disengage the line relay to stop the washer.

TEMPERATURE SENSOR INPUT

A thermistor is located in the water valve to

monitor the blended incoming water tempera-

ture. The machine control uses this input sig-

nal to regulate the water temperature with the

warm or cold wash or warm rinse tempera-

ture selections (See Water Valve Outputs).

START/STOP INPUT

TIMER INPUTS

The start/stop input is energized by the mo-

mentary Push-to-Start/Stop Switch. If this in-

put is energized when a cycle is in progress,

the machine control will disengage the line

relay, both water valve output signals, the door

lock wax motor signal, the timer motor out-

put signal, and the on-light output signal. If

this input is energized when a cycle is not in

progress, the machine control will energize

the line relay and begin the cycle sequence as

defined by the timer and user input switches

(See Push-To-Start/Line Relay Operation).

The Timer Input signals are energized through

the cams in the timer. The timer operates with

a 30 second drive cycle and a 5.8 second ad-

vance time (See Timer Input Charts).

WATER TEMPERATURE INPUTS

The Water Temperature inputs are two sepa-

rate signals defined by a user input switch on

the control panel. The machine control inter-

prets these signals to determine what the wa-

ter temperature should be for each fill (See

Water Valve Outputs).

1-7

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END-OF-CYCLE SIGNAL OUTPUT

OUTPUT DEFINITIONS

The End-Of-Cycle Signal Output is an inter-

nal signal on the machine control between the

microprocessor and annunciator. The end-of-

cycle signal sounds when a wash cycle is fin-

ished and the End-Of-Cycle Input is energized.

The end-of-cycle signal sounds as six pulses

in a 0.35 seconds on, 0.15 seconds off pattern

(See Timer Input Charts).

DOOR LOCKED LIGHT OUTPUT

NOTE: This section applies only to washers

between Series 10 and 16. The "Door Locked"

lights on washers from Series 17 and after are

controlled by a "Door Locked" light switch.

The Door Locked Light Output signal powers

a 1/3 watt neon indicator lamp on the control

panel. This output is first energized when the

Door Lock Wax Motor Output is energized. At

the end of the cycle, it remains energized for

50 seconds after the Door Lock Switch Input

shuts down. This delay allows the wax motor

to fully retract and unlock the door.

ON LIGHT OUTPUT

NOTE: This section applies only to washers

from Series 17 and after. The "Door Locked"

lights on washers between Series 10 and 16

are controlled by a cam on the timer.

The Door Locked Light Output signal powers

a 1/3 watt neon indicator lamp on the control

panel. This output is energized when the

washer is operating in a wash or spin cycle.

Note that the "On" light is not illuminated when

the timer is in a delay increment.

NOTE: The washer will continue to tumble

at the end of cycle until this 50 second delay

is elapsed.

DOOR LOCK WAX MOTOR OUTPUT

The Door Lock Wax Motor Output signal pow-

ers a wax motor in the door lock assembly.

The wax motor extends to drive the door lock

system for the washer.

TIMER MOTOR OUTPUT

The machine control energizes the Timer

Motor Output to allow for variable-length

timer increments. If the washer is started with

the timer set in a Prewash Tumble, Main Wash

Tumble, Light Wash Tumble, or Rinse Tumble

increment, the machine control will not be-

gin the cycle sequence timing until the water

level reaches the appropriate level. The Timer

Motor Output is disengaged during this time.

If the washer is started with the timer set in a

Prewash Tumble, Main Wash Tumble, or Light

Wash Tumble increment, the machine control

will wait for three minutes before energizing

the Door Lock Wax Motor Output. This delay

is not affected by water level. This output re-

mains energized until the end of the cycle.

The machine control will stop the washer by

disengaging the line relay if the following oc-

cur: 1) The machine control energizes the

timer motor until it senses a timer change. 2)

The timer motor remains energized for five

minutes while the timer inputs change (See

Timer Input Charts).

If the washer is started with the timer set in a

Prewash Drain, Bleach Dispense, Spin1, Rinse

Tumble, Spin2, or Spin3 increment, the ma-

chine control will energize this output imme-

diately.

The machine control will continuously ener-

gize the Door Lock Wax Motor Output during

the final (Spin 3) sequence until 30 seconds

before the washer begins to coast from the

final speed.

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1-8

circuit opens and de-energizes the Pressure

Switch Input on the machine control, which

de-energizes the Water Valve Outputs.

The machine control counts the number of

rinses during a normal wash cycle. In the first

and second Rinse Tumble increments, the

machine control will energize the Timer Mo-

tor Output as soon as the Pressure Switch In-

put is no longer energized, indicating that the

water has reached the full level. In the third

and fourth (if Extra Rinse is selected) Rinse

Tumble increments, the machine control will

energize the Timer Motor Output 30 seconds

after the Pressure Switch Input is no longer

asserted.

The machine control will read the Water Tem-

perature Sensor Input to determine the

blended water temperature passing through

the water valve. In a warm wash fill, the ma-

chine control will first energize both the hot

and cold Water Valve Outputs for five seconds

then de-energize the cold Water Valve Output

and monitor the water temperature. When

the Water Temperature Sensor Input passes

the warm threshold (approx. 20 K Ohms), the

machine control will re-energize the cold out-

put for the remainder of the fill.

The machine control will energize the Timer

Motor Output when the timer is set into a

Spin1, Spin2, or Spin3 increment 30 seconds

before the end of the spin. It will remain ener-

gized until the timer inputs change.

In a cold wash fill, the machine control will

first energize only the cold Water Valve Out-

put for five seconds. It then energizes the hot

Water Valve Output and monitors the Water

Temperature Sensor Input until it passes the

cold threshold (approx. 44 K Ohms), when it

de-energizes the Hot Water Valve Output for

the remainder of the fill.

TORQUE OUTPUT

The machine control commands motor speed

and direction through the Torque Output from

the machine control to the motor control.

This output is a pulse width modulated (PWM)

signal (See Section 2: Machine Control).

If the user selects a warm rinse temperature,

the machine control will count the rinses and

allow a warm rinse fill only on the third and

fourth (if the user also selects the Extra Rinse

option) rinses. The first two rinses will be cold

only. The machine control does not regulate

water temperature during the rinses.

Vcc REFERENCE VOLTAGE OUTPUT

The Vcc Outputs are a reference voltage for

many of the signal outputs. On the machine

control, the Vcc outputs are 24 VDC refer-

enced to the 120 VAC neutral line.

WATER VALVE OUTPUTS

The machine control determines whether the

hot or cold Water Valve Outputs should be en-

ergized during each timer increment, but it

only gates the power to the water valves, it

does not directly provide that power. When

the timer is in an increment calling for water,

power passes from the timer to the wash or

rinse level circuit in the pressure switch. When

the water level is below the full level, the pres-

sure switch circuit is closed and the power

passes to the machine control. The machine

control gates the power to the hot and cold

Water Valve Outputs. When the pressure

switch senses that the full level is reached, the

NOTE: If the user chooses the Easy Care/

Perm Press fabric selection, all rinse fills will

be cold regardless of whether the user also

selected the warm rinse temperature.

1-9

16008373-01

SECTION 1. GENERAL INFORMATION

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washers only) will de-energize and the End-

of-Cycle Signal will sound if the user had se-

lected the End-of-Cycle Signal option.

CYCLE SEQUENCE DEFINITIONS

NOTE: Refer to Section 2: Timer Input Charts

for information on the timing of each cycle

sequence.

LIGHT WASH TUMBLE, MAIN WASH

TUMBLE, and RINSE TUMBLE

The machine control will tumble the washer

at the pattern and speed defined by the Fabric

Selection Inputs (See Cycle Review). Each

tumble will start only after the previous

tumble has completely stopped. The machine

control will reverse the tumble direction after

each pause. The machine control will con-

tinue to tumble the washer until the timer in-

puts change.

BLEACH DISPENSE

In a Bleach Dispense increment, the machine

control will follow the same tumble pattern

and speed as in a Main Wash Tumble incre-

ment.

DELAY

During a Delay increment, the door Lock Wax

Motor Output, Door Locked Light Output (Se-

ries 17 and later only), Motor Torque Output,

"On" light (Series 10 to 16 only), and Water

Valve Outputs are de-energized. Note that the

Delay indicator is energized through a cam

on the timer.

In a Light Wash Tumble or Main Wash Tumble

increment, the machine control will de-ener-

gize the line relay if the washer continues to

tumble for 29 minutes. This would only oc-

cur if the timer were to stall (See Section 1:

Timer Motor Output and Section 2: Timer

Input Chart).

EXTRA RINSE

When the user selects the Extra Rinse option,

the spin increment following the third rinse

will follow the Spin2 cycle sequence. The

Timer Motor Output will be energized 60 sec-

onds prior to the end of the spin cycle se-

quence and will remain energized to advance

the timer through the "Off" increment into the

Rinse Tumble increment.

PREWASH DRAIN

During a prewash drain increment, the washer

will tumble at the same speed and in the same

pattern as in the Prewash Tumble increment

for the fabric selection. The Door Lock Wax

Motor Output will be energized during this

increment (See Prewash Tumble).

If the Extra Rinse option is not selected, this

spin will follow the Spin3 cycle sequence and

the Timer Motor Output will be energized 30

seconds prior to the end of the final spin.

PREWASH TUMBLE

When the timer is set into a Prewash Tumble

increment, the machine control will tumble

at 51 rpm in the following tumble pattern:

IDLE

Cycle

Tumble-Pause Pattern

6 sec. - 24 sec.

3 sec. - 27 sec.

The Idle increment follows the final spin in-

crement in each cycle. If the Door Lock Switch

Input is energized when the timer advances

into the Idle increment at the end of the cycle,

the machine control will tumble the washer

until 50 seconds after the Door Lock Switch

input is no longer energized. This allows time

for the Door Lock Wax Motor to fully retract.

At this time, the Door Lock Light Output

(washers between Series 10 and 16 only) or

the "On" Light Output (Series 17 and later

Cotton/Sturdy

Easy Care/Perm Press

Delicates

Hand Washables

16008373-01

SECTION 1. GENERAL INFORMATION

1-10

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In a Prewash Tumble increment, the machine

control will de-energize the line relay if the

washer continues to tumble for 15 minutes.

This would only occur if the timer were to stall

(See Section 1: Timer Motor Output and Sec-

tion 2: Timer Input Chart).

control will energize the timer motor output

until the timer inputs change so the washer

can proceed with the cycle.

At the end of spin sequence, if the door lock

switch input is de-energized before the washer

drops below 91 rpm, a hardware circuit on the

machine control will interrupt the torque out-

put signal, which forces the motor control to

0 rpm, and energize the door lock wax motor

circuit to lock the door. This hardware circuit

will keep the door lock wax motor circuit en-

ergized until the door lock switch input signal

is energized.

MISCELLANEOUS

Door Latch Switch Monitoring

At the end of a cycle, when the timer advances

into the Idle increment, the machine control

will keep the line relay energized until it loses

power when the door latch switch opens. This

guards against the switch contacts welding

closed. In this condition, the machine con-

trol will limit what additional cycles can be run

before the door is opened as follows:

Redistribution

The machine control commands a distribu-

tion profile speed ramp from 0 rpm to 85 rpm

at the beginning of each high speed (above

100 rpm) spin. When the washer reaches 85

rpm, the machine control monitors the Tach

Input to determine if the speed varies through

one revolution of the spinner basket. If it

senses a high enough variation in speed (sug-

gesting an out-of-balance condition in the

clothing load), it will drop the spinner speed

to 0 rpm and force a short reverse tumble to

redistribute the clothing load before resum-

ing the spin. If any of the out-of-balance

switches trip and open the out-of-balance in-

put circuit at a speed below 500 rpm, the ma-

chine control will also drop the speed to 0 rpm

and force the reverse tumble to redistribute

the clothing load.

Washers between Series 10 and 16

The machine control will allow the washer

to restart only if the user sets the timer

into a Rinse Tumble or Spin3 increment.

Washers from Series 17 and Later

The machine control will allow the washer

to restart in any setting. After that cycle

completes, the user must open the door

before the machine control will allow a

third cycle to start.

Door Lock/Spin Control

When the machine control begins a spin in-

crement, it will not command spin speed

above 51 rpm unless the door lock switch in-

put is energized. At the start of a spin incre-

ment, the machine control will drop the speed

to 0 rpm then tumble until the switch is ener-

gized. At that point, it will restart the spin se-

quence. If the door lock switch is not ener-

gized after 2 minutes of tumbling, the machine

1-11

16008373-01

SECTION 1. GENERAL INFORMATION

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The following rules determine the maximum

number of redistribution attempts that will be

allowed in each spin step before the machine

control skips the step and continues with the

spin profile (See Section 2: Unbalance Con-

trol System).

STOPPING THE WASHER

1. With the washer running, power is

supplied to the machine control and

washer from gray wire no. 26 through the

line relay.

2. When the user presses the push-to-start

button, a signal is sent to the machine con-

trol through red wire no. 28 telling the

washer to shut down.

Push-To-Start Relay Operation

3. The machine control opens the internal

logic switch which de-energizes the line

relay.

4. When the user releases the push-to-start

button, power is removed from the ma-

chine control and washer (Black wire no.

27).

STARTING THE WASHER

1. With the door closed, press the push-to

start switch.

2. The red no. 28 wire sends a signal to the

machine control to start running.

3. 120 VAC is supplied to the machine con-

trol board through black wire no. 27.

4. The machine control closes an internal

switch to energize the line relay.

5. When the push-to-start button is released,

power remains supplied to the machine

control and the washer from gray wire

no. 26 through the line relay.

MACHINE CONTROL BOARD

INTERNAL LOGIC

SWITCH

120 VAC POWER

FROM MACHINE

CONTROL BOARD

LINE

RELAY

COM

GY 26

120 VAC LINE

(When door is

closed)

BK 27

120 VAC Line

To Timer &

Motor Control Board

RD 28

PUSH TO START SWITCH

Figure 1-8

16008373-01

SECTION 1. GENERAL INFORMATION

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1-12

CYCLE REVIEW

Main Wash Time/Total Cycle Time - Minutes (See Notes).

N on- M ax

Ex t ra ct

Ea sy C are /

Pe rm Press

H a nd

W a sha bles

C ot t on/ S t urdy

23 .0 /4 9.0

D e licat e s

20 /46.5

H e av y W ash

N o r m al W ash

20 .0 /4 5.5

14 .0 /3 9.5

N o t A p p lic ab le

17 .0 /4 3.0

14 .0 /4 0.5

Lig h t/Q u ick

W as h

11 .0 /3 7.0

80 0/3.5

8.0/33 .5

60 0/3. 0

7.0/34 .5

50 0/4.5

N o t A p p lic ab le

Fin al S p in

(RPM /M i n )

M a x Ext ract

C ycle s

Ea sy C are /

Pe rm Press

H a nd

W a sha bles

C ot t on/ S t urdy

23 .0 /4 6.0

D e licat e s

20 .0 /4 2.0

14 .0 /3 6.0

H e av y W ash

N o r m al W ash

20 .0 /4 1.5

14 .0 /3 5.5

20 .0 /4 3. 0

14 .0 /3 7. 0

17 .0 /4 0.0

Lig h t/Q u ick

W as h

11 .0 /3 4.0

80 0/4.0

8.0/29 .5

60 0/3. 5

8 .0 /3 0.0

50 0/5.0

8 .0 /3 1.0

50 0/5.0

Fin al S p in

(RPM /M i n )

Notes:

1. The main wash times listed include 2 minutes of bleach fill and tumble time.

2. The total cycle times are approximate and will vary based on water fill times, due to types of

clothing loads, available water pressure and the time for the door lock system to retract at

the end of the cycle.

3. The main wash time is affected significantly if the machine control detects an excessive

amount of suds. The washer will go into a suds reduction routine, consisting of a series of

additional rinse and partial drain cycles to reduce the suds present (See Troubleshooting &

Diagnosis - Clothes Wet at End of Spin).

Tumble Pattern - Number of seconds tumbling/Number of seconds of pause between tumbles.

Cotton/ Sturdy

Easy Care/

Perm Press

Delicates

Hand Washables

7/3

5/3

6/24

3/27

1-13

16008373-01

SECTION 1. GENERAL INFORMATION

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GENERAL COMPONENT EXPLODED VIEW

16008373-01

SECTION 1. GENERAL INFORMATION

1-14

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SECTION 2. ELECTRICAL COMPONENTS & TESTING

ELECTRICAL TEST EQUIPMENT

The equipment required to service Maytag

products depends largely upon the conditions

you encounter. Locating a malfunction will

often require the use of electrical testing

equipment such as:

Description

Part Number

20000005

20001001

20000002

20000081

Analog Test Meter

Digital Test Meter

Clamp-On Ammeter

AC Voltage Sensor

Clamp-On Ammeter

can be used to detect

shorts. Overloads on

the circuit

breaker or fuse

can be traced

Analog Test Meter

can be used to check

for open or closed

circuits, measure resis-

tance, AC and DC volts,

and temperature.

to either the

washer or circuit

breaker by check-

ing the washer

current draw.

AC Voltage Sensor

Digital Test Meter

can be used to check for

open or closed circuits,

measure resistance,

AC and DC volts,

can be used to alert you if

AC voltage is present so proper

safety precautions can be observed.

The tip of the sensor will glow

bright red if voltage is between

110-600 volts AC.

and temperature.

16008373-01

SECTION 2. ELECTRICAL COMPONENTS & TESTING

2 - 1

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ELECTRICAL TESTS

Water Valve Test

Check the water valve for electrical continu-

ity. This check should be made with the elec-

t rical supply disconnect ed from t he washer.

Remove the wire harness from the water valve

terminals and place the ohm meter probes on

the terminals of the water valve. The water

valve solenoid coil should have a resist ance

bet ween 500- 1000 ohms . If no ohms are

shown on t he display of t he elect rical t est

met er, t he solenoid coil has an open winding

and the valve should be replaced. The ther-

mistor in the water valve changes in resistance

in direct relat ionship t o wat er t emperat ures.

To monitor the performance of the thermistor,

run a partial hot water fill and check the ohm

resistance of the thermistor circuit. Then, run

a cold water fill and measure the resistance

again. There should be a not able difference

in the resistance readings. To check the ohm

resist ance, pull t he P2 wire harness connec-

t or off t he machine cont rol and locat e t he

P2(5) and P2(6) leads in the connector

Warning - Always shut off

electrical power to the

unit before beginning any

service repair procedures.

Gr ounded Component s

When per f or ming s er vice diagnos t ics , r e-

placement s and repairs, always check t o de-

t er mine whet her all gr ound wir es linking

panel and component s are reat t ached if

r e move d.

Volt age Checks

Generally, these checks will consist of taking

readings at t he wall recept acle t o det ermine

the availability of voltage to the product. Volt-

age checks on individual component s of a

product are not recommended due t o t he

possibility of electrical shock. Component part

t est ing is best accomplished t hrough cont i-

nuit y checks wit h an Appliance Test Met er

(See Elect rical Test Equipment ).

(Figure 2- 3).

Wax Motor Check - Door Lock

Me cha nis m

NOTE: Use of t he met er on volt age higher

t han t he indicat ed range may cause perma-

nent damage to the meter. To prevent dam-

age, first select the highest range and then

lower the range for readings which fall within

the lower scale.

Check t he wax mot or for proper resist ance.

This check should be made with the electrical

supply disconnect ed from t he washer. Re-

move t he wire harness from t he wax mot or

terminals and place the ohm meter probes on

the terminals of the wax motor. The wax mo-

tor should have a resistance of approximately

1900 ohms at room t emperat ure. To check

wax mot ors t hrough cons ole, s ee s ect ion:

Machine Cont rol page 2- 5.

Set up meter for use as follows:

1. Turn selector knob to desired meter func-

t ion and appropriat e range.

2. Plug black lead into socket marked black

(- ).

3. Plug red lead into socket marked red (+).

4. Place test leads into receptacle to deter-

mine volt age available.

16008373- 01

SECTION 2. ELECTRICAL COMPONENTS & TESTING

2 - 2

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Timer & Console Switches

The time r is locate d in the control console on

the back. It is composed of a series of switches

drive n by an e le ctric time r motor. The time r

motor rotates a pinion gear which then rotates

inte rnal cams . As the cams rotate , the y lift

and drop various s witch contacts which ride

on the cam. The inte rnal s witche s provide

cycle sequence or step inputs to the machine

control to control the pump, dis pe ns e r wax

motors, de lay light, ON light and time r motor.

Figure 2-2

The time r wire ha rne s s conne ctor ca n be

pulled and the individual contacts for the vari-

ous circuits can be che cke d with an ohm

me te r. As illus trate d, time r contact for the

drain pump is 14T (Figure 2-1).

motor windings . The following chart can be

us e d for che cking othe r compone nts via the

time r wire harne ss conne ctor.

Description Connector

Connector

Ohms

Pump

14T

10B

Motor

Bleach Wax

10B

950-1100

5000

Motor

Softener

Wax Motor

Timer

10T

Motor

Figure 2-1

You can ide ntify the wire for the drain circuit

(Figure 2-2) by tracing down the s ide of the

conne ctor to contact 14, and acros s to align

with column T.

Time r Input Charts

As s tate d pre vious ly, the machine control

board re ce ive s inputs from the time r monitor

whe re the time r is in the cycle . The machine

control board accomplis he s this by routing

four circuits through the timer. Two of the cir-

cuits (1A & 1B) are supplied with 120 VAC and

the othe r two circuits (2A & 2B) are 24 VDC.

The voltage s for the four circuits is shown on

the time r chart of the e le ctrical s che matic

e nclose d in the washe r console .

Contact 8B in the conne ctor is a dire ct con-

tact to the ne utral le g of the time r. Whe n an

ohm me te r probe is place d into the 14T con-

nection and the other probe is placed into 8B,

an ohm re ading of the comple te drain circuit

can be pe rforme d. The drain circuit s hould

have a re sistance of approximate ly 18 ohms.

This is the re s is tance re ading of the pump

16008373-01

SECTION 2. ELECTRICAL COMPONENTS & TESTING

2 -3

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Soft ware in t he machine cont rol board specifically monit ors t he t imer input circuit s t o

determine where the timer is in all the wash cycles and will rapidly advance the timer to

OPEN and break contacts in the timer. The timer is solely used as an off-board set of

relay switches. Note: The timer motor is hard wired to timer cams 10T and 10B in the

t imer .

TIMER 1A

(120 VAC)

PK19/P7(8)

TIMER 1B

(120 VAC)

YL16/P7(7)

TIMER 2A

(24 VDC)

PU17/P3(3)

TIMER 2B

(24 VDC)

BU18/P3(5)

CYCLE SEQUENCE

PREWASH TUMBLE

PREWASH DRAIN

MAIN WASH TUMBLE

LIGHT WASH TUMBLE

BLEACH DISPENSE

RINSE TUMBLE

SPIN 1

SPIN 2

SPIN 3

EXTRA RINSE

DELAY

IDLE

Key: 0 = Input Signal Not Asserted

1= Input Signal Asserted

There are condit ions under which t he machine cont rol will shut t he cycle down if t he

t imer does not advance.

During Extra Wash/ Prewash: If the timer inputs do not change away from Prewash

Tumble for 15 minutes, the machine control will open the line relay.

During Main Wash: If t he t imer input s do not change for 29 minut es, t he machine

control will open the line relay.

During any increment when t he machine cont rol energizes t he t imer mot or unt il it

sees the timer inputs change: If the timer inputs do not change for 5 minutes with the

t imer mot or cont inuously energized, t he machine cont rol will open t he line relay.

These varying delays are t o allow t he washer t o progress t hrough several increment s

where t he t imer input s normally do not change. In t hese cases, t he machine cont rol

energizes the timer motor for 30 seconds, which is its advance time. It does not look for

a t imer input change.

16008373- 01

SECTION 2. ELECTRICAL COMPONENTS & TESTING

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2 - 4

Machine Control

The machine control microproce s s or board is locate d in the control cons ole , mounte d to the

re ar pane l. The board re ce ive s input from the time r, door latch and lock s witche s , and unbal-

ance and se le ctor switche s on the console . It also communicate s with the motor control board

to facilitate the various cycle s and drive the motor for optimum pe rformance . Torque and

s pe e d of the motor are monitore d through the motor control board.

Prior to Se rie s 17

Figure 2-3

Se rie s 17 and Afte r

Figure 2-3b

Both incoming and e xiting voltage are monitore d through the machine control board and the

s urrounding circuitry. The following table lis ts the voltage s for the various te rminals on the

microproce s s or board. If prope r voltage is not pre s e nt, che ck s witche s and wiring for any

loos e conne ctions or ope n circuits by dis conne cting the powe r s upply and pe rforming conti-

nuity che cks of individual circuits . NOTE: Conne ctor P5 is Ne utral input and L1 input is the

Line Re lay Conne ctor Comm (Gray wire ), L1 output is Line Re lay Conne ctor Comm (Black

wire ).

To check voltages from the board, turn timer dial to a wash cycle and press the start/ off button.

This will activate the L1 re lay board and apply powe r on the machine control.

16008373-01

SECTION 2. ELECTRICAL COMPONENTS & TESTING

2 -5

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M ACHIN E

CON TROL

BOARD

M ACHIN E

CON TROL

BOARD

FU N CTION

VOLTAGE-

APPROX.

TIM ER

CON TACT

TERM INAL/ W IRE TERM INAL/ W IRE

(W hen Activated)

Permanent Press

(Fab ric Sw i tch )

P5 (W H11)

P3/2 (PK 37)

P3/6 (OR 38)

P3/8 (BR 39)

24 VDC

Not Inv o lved

Delicates

(Fab ric Sw i tch )

Hand W ash

(Fab ric Sw i tch )

Cotton/Sturdy

(Fab ric Sw i tch )

P5 (W H 11 )

P3/2 (PK 37)

P3/6 (OR 38)

P3/8 (BR 39)

0 VDC

Signal O N / O FF

(Options Sw itch )

P5 (W H 11 )

P2/1 (PU 21)

P7/8 (PK 19)

P2/3 (Y L 20)

P1/3 (RD 28)

24 VDC - ON

0 VDC - OFF

Not Inv o lved

12B, 6B,8T

Extra Rinse

(Options Sw itch )

120 VAC

M ax Extract

(Options Sw itch )

24 VDC

Not Inv o lved

Push To Start

Sw itch

120 VAC

(When pressed)

U nbalance

Control

P5 (W H11)

P2/4 (OR 40)

P3/7 (Y L 36)

24 VDC

Not Inv o lved

Door Lock - Spin

P3 (1)

24 VDC

Not Inv o lved

M otor Control &

M achine Control

P5 (W H11)

LIN E RELAY COM

(BK 27 or BK1)

120 VAC

Hot W ater Valve

P5 (W H11)

P7/1 (OR7)

120 VAC or

500-1000 Ohms

Not Inv o lved

Cold Water Valve

P7/2 (BU 9)

P7/4 (BR 14)

Not Inv o lved

120 VAC o r

500-1000 Ohms

Door Lock Wax

M otor

120 VAC

Bleach Wax

M otor

Softener W ax

M otor

Delay Light

P5 (W H11)

Not Inv o lved

P7/5 (RD 3)

120 VAC

On Light

Not Inv o lved

(Series 17)

16008373- 01

SECTION 2. ELECTRICAL COMPONENTS & TESTING

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2 - 6

The following illus tration s hows the motor

te rminals for e ach of the coils involve d. The

letters with positive and negative symbols in-

dicate the motor phase circuitry of the

terminals.

DRIVE MOTOR

The drive motor is a switched reluctance type

motor. The bas ic ope rating principle of the

switched reluctance motor is direct magnetic

attraction between the stationary electromag-

netic coils (stator) and a specially configured

rotor or armature (Figure 2-4). The rotor is

compris e d of s tacke d plate s or laminations

mounte d on a ce nte r s haft. The s hape of

the s e laminations are characte ris tic of the

s witche d re luctance motor. The rotor, whe n

vie we d from the e nd of the rotor, has "te e th"

much like a gear. These "teeth", or pole pieces,

are pulled as the result of direct current power

through the stator coils.

Motor Harness Connector

Figure 2-5

Refer to section titled Motor Control for board

identification of A, B and C terminal/ harnesses

(Figure 2-6). Als o, s e e the wiring s che matic

for harness identification.

MOTOR CONTROL BOARD

The motor control board re ce ive s 120 VAC

voltage from the line cord and distribute s DC

voltage to the drive motor. The motor con-

trol converts the voltage from single phase to

3 phas e for the drive motor.

Figure 2-4

Multiple stator coils are positioned around the

rotor and are conne cte d in thre e diffe re nt

phased "sets" of paired coils.

Anothe r purpos e of the motor control is to

monitor the drive motor s pe e d through a ta-

chome te r circuit linking the motor control

board to a tachometer on the drive motor. This

is a 3-wire circuit compris e d of a Black, Blue

and White wire harness. Failure of this circuit

will caus e the motor to s tart je rking in place

or accelerate rapidly for up to 5 seconds. This

occurs whe ne ve r the tachome te r in the drive

motor is trying to locate the prope r s hutte r

and se nsor se que nce . For e xample , if the ta-

chome te r s ignal is los t from the motor con-

trol to the machine control jus t prior to s pin,

the motor will ramp up for 5 s e conds the n

stop.

Magnetic attraction causes the rotor poles to

turn toward the coils . The e le ctronic motor

control board switche s the magne tic fie ld off

as the rotor pole pie ce approache s ; the n,

turns on another set of coils further ahead. It

is this s witching action of motor phas e s that

de te rmine s dire ction and rotational spe e d of

the rotor (and shaft). The motor control board

changes the 120 VAC voltage line input to 170

VDC, and distributes the current phases to the

stator coil sets in sequence to the drive

motor.

16008373-01

SECTION 2. ELECTRICAL COMPONENTS & TESTING

2 -7

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6. If the motor runs , and the s pinne r rotate s

at the proper RPM speed, the problem lies

outs ide of the motor and motor control

circuit. Dis conne ct powe r to the was he r

and re conne ct the JP4 Inte rface conne c-

tor to the motor control.

Motor & Motor Control Te s t

1. Se t the time r knob into the de lay incre -

ments.

2. Press the push-to-start switch to start the

was he r in the de lay mode . Confirm the

de lay light is ON.

7. If the motor doe s not run:

A. Che ck the 10-amp fuse locate d on the

control board, e ithe r vis ually or with an

ohm meter. If bad, completely replace mo-

tor control/ wire harness assembly

(Figure 2-6).

3. Che ck for 120 VAC be twe e n the L and N

terminals (black wire no.27 and white wire

no. 13) on the motor control board. If not

pre s e nt, che ck wiring be twe e n the ma-

chine cont rol a nd t he mot or cont rol

boards.

B. If the fuse is functioning, visually check

the s ix s e miconductors on the he at s ink

for any damage . If damage d, re place mo-

tor control/ wire harne s s as s e mbly com-

ple te and che ck motor windings for dam-

age (Se e Drive Motor). Re place motor if

necessary(Figure 2-6) .

4. Unplug the was he r powe r cord. Te s t cord

to the same board te rminals.

5. Remove JP4 Interface connector wire har-

ne s s on front e nd of motor control board.

C. If fus e and s e miconductors s how no

vis ible damage , pe rform the motor phas e

test.

6. Plug the washer power cord into a 120 VAC

powe r s ource . The motor control will im-

me diate ly e xe cute a te s t routine and the

motor s hould run, rotating the s pinne r at

50 rpm.

8. Unplug the was he r powe r cord and re -

place motor control board conne ctor JP4

whe n finishe d.

Motor Phase Test

It is pos s ible for the motor to s till run unde r

light loads whe n one of the phas e s of the

motor is nonfunctional. One pos s ible s ymp-

tom would be a "growling" nois e from the

motor. Torque is de cre as e d whe n the motor

is out of phas e . This could re s ult in a cus -

tome r complaint that the load is not spinning

out properly or it does not tumble consistently

with a large load (Se e Se ction 3: Trouble -

shooting).

Figure 2-6

16008373-01

SECTION 2. ELECTRICAL COMPONENTS & TESTING

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windings check (See Mot or Windings

To gain access to the motor control board

Check).

t erminals (Figure 2- 6):

10. Check Phase B by disconnecting the white

or red wire at the motor control board. If

the motor operates with a slight growling

sound, phases A and C are operating cor-

1. Disconnect power t o t he washer prior t o

t es t ing.

2. Remove t he t wo screws securing t he mo-

tor control assembly to the base. Unsnap

the two twist-lock wire ties restraining the

motor to the motor control board harness

bas e.

rectly.

Reconnect phase B and test with

phase A disconnected. If the motor does

not run properly, phase A or C is not func-

t ioning.

Per f or m t he mot or windings

check (See Mot or Windings Check).

3. Remove the green ground wire, line & neu-

tral wires and the JP4 connector from the

mot or cont rol board.

Mot or Windings Check

4. Carefully lift the front end of the motor

control board to disengage the rear lock-

ing tabs from the slots in the base. Slowly

drag the motor control board, with motor

harness attached, toward the front of the

washer and place in front of the washer.

1. Disconnect power t o t he unit .

2. Remove each pair of phase wires from the

mot or cont rol and perform an ohm check

of each wire leading to the motor. Each

wire pair should show 2-3 ohms resistance

(Figure 2- 5).

5. Remove t he screw securing t he splash

shield covering the face of the motor con-

trol board. Pivot the splash shield with top

screw in t he mot or cont rol board met al

frame, allowing t he plast ic shield t o be-

come an elect rical s hield bet ween t he

mot or cont rol board and t he base.

2. There should be no cont inuit y bet ween

any of the terminals and the frame of the

mot or .

3. Check that all six motor terminals are se-

cure and at t he same height in t he con-

nect or housing. Replace mot or if t ermi-

nals are pressed into the motor.

6. Reconnect the ground wire, line 1 and neu-

tral wires. Leave the JP4 connector off the

board (Figure 2- 6).

4. Remount t he six- posit ion mot or connec-

tor onto the motor. Reassemble the drip

shield cover ont o t he mot or cont rol.

7. Place the timer knob into the delay

incr ement s .

8. Plug the power cord into the wall socket

and press the push-to-start button.

5. Repos it ion t he mot or cont rol int o t he

washer when finished. Make sure the two

screws and the twistlock wire ties are fas-

tened properly to the wire harness.

9. Check Phase C by disconnecting the yel-

low or orange wire at t he mot or cont rol

board. If the motor operates with a slight

growling sound, phases A and B are oper-

at ing correct ly.

Reconnect phase C and

t est wit h phase B disconnect ed. If t he

motor does not run properly, phase A or

B is not funct ioning. Perform t he mot or

16008373- 01

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2 - 9

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PHASE WIRE COLORS

MOTOR CONDITION RESULT/SOLUTION

Yellow or Orange

Runs

-Phases A&B are operating correctly.

(Check Phase A and B)

-Phase A or B is non-functional.

(See Step 10)

Does Not Run

White or Red

Runs

-Phases A&C are operating correctly.

(Check Phase A and C)

-Phase A or C is non-functional.

(See Step 10)

Does Not Run

Black or Blue

Runs

-Phases B&C are operating correctly.

(Check Phase B and C)

Does Not Run

-Phase B or C is non-functional.

(See Step 10)

Tachometer Circuit Diagnostics

The tachome te r s ys te m of the motor is com-

prised of a plastic wheel, called a shutter, and

an optical s e ns or (Figure 2-9). The s hutte r is

mounte d to the e nd of the motor s haft unde r

the plastic endbell covering of the motor. The

edge of the shutter resembles a "picket fence"

with different size "pickets." The pattern con-

s is ts of s ix diffe re nt "picke ts " which are re -

pe ate d e ight time s . An optical s e ns or is

mounte d to one side of the shutte r and moni-

tors the "pickets" as they pass through the

sensor.

Figure 2-9

As the "pickets" pass through the sensor field,

signals are ge ne rate d and transmitte d to the

motor control board through the tachome te r

wire harness (Figure 2-10 and 2-11).

Figure 2-10

16008373-01

SECTION 2. ELECTRICAL COMPONENTS & TESTING

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-1

The following table indicate s voltage che cks

of the tachome te r harne s s be twe e n the mo-

tor and motor control board.

Tachometer

Wire Checks

Condition Of

Component

Voltage Found

White to Black

(From Motor

Control)

11 VDC

(± 2.5 VDC)

Good Motor

Control Board

White To Black

(From Motor

Control)

Bad Motor

Control Board

0 VDC

White To Black

(From Motor

Control)

+ 13 VDC or

<9 VDC

Figure 2-11

Bad Motor

The motor control monitors the s ignals and

communicate s this information to the ma-

chine control. The purpose of this signal is to

te ll the motor whe n to e ne rgize e ach winding

in the motor and to te ll the machine control

the actual motor spe e d.

No change in

DC volts as

motor is turned

slowly

Blue to Black

(From Drive

Motor)

Voltage

changes from 0

- 5 VDC volts as Good Motor

motor is turned

slowly.

Blue to Black

(From Drive

Motor)

Note : If the machine control board doe s not

re ce ive an input s ignal from the motor con-

trol/ tachome te r circuit (JP4 conne ctor), the

motor spe e d will rapidly acce le rate for 5 se c-

onds the n s hut down. The machine control

will s e ns e a "locke d rotor" condition and the

motor will s top. If the motor control doe s

not re ce ive an input s ignal from the motor,

the motor will "je rk" for 5 s e conds the n s hut

down.

UNBALANCE CONTROL SYSTEM

The unbalance control s ys te m is compris e d

of the inertial switch, outer tub displacement

switch, strut displace me nt switch and a cabi-

ne t vibration se nsor mounte d to the machine

control board. The thre e s witche s are wire d

in s e rie s on a 24 VDC circuit, monitore d by

the machine control board. The s e ns or is

mounte d on the machine control board.

1. Inspect the motor control wire harness for

integrity of the connections on both ends.

The harne ss is comprise d of a White , Blue

and Black wire .

2. Se t the washe r into the De lay Wash cycle

and press the start/ off button. The unit will

start without activating the motor. Le ave

the tachometer harness on the motor con-

trol and ins e rt the me te r probe s into the

back side of the tachommeter harness.

Software in the machine control board will

be gin monitoring the switche s whe n the spin

speed reaches 90 rpm. The inertial unbalance

s witch monitors oute r tub vibrations above

150 rpm. Ins ide the door is a cabine t vibra-

tion abs orbe r de s igne d to counte r the vibra-

tion of the tub and se rve as a tune d absorbe r

for the whole washe r.

16008373-01

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2 -1 1

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Whenever a displacement swit ch is t ripped,

t he machine s t ops and r edis t r ibut es t he

clothes load. This involves a three (3) second

pause, followed by a five (5) second reverse

tumble (47-49 rpm) to redistribute the clothes

load. The washer will pause again for three

(3) seconds, then start the distribution profile

again. To redistribute the load, the machine

t umbles t he load (50- 90 rpm) and again at -

t empt s t o pass t hrough crit ical (about 150

rpm). The machine will t ry t o redist ribut e

twice as the washer attempts to spin at 800

r p m.

Tub Displacement Swit ch

The tub displacement switch is located on the

upper right hand side of the outer tub, below

t he t op concret e weight , bet ween t he out er

tub and the cabinet. The switch senses the

out er t ub t ouching t he cabinet side as t he

machine passes t hrough crit ical. When t his

swit ch is t ripped, t he machine st ops and re-

distributes the load.

Test ing t he Tub Displacement Swit ch:

1. Disconnect power t o t he unit .

Once t he load is properly redist ribut ed and

the speed reaches above 500 rpm, the inertial

switch and cabinet vibration sensor are used.

If the inertial switch or sensor is activated, the

washer will drop in spin speed. This is based

upon t he speed at which swit ch act ivat ion

takes place. See Figure 2-12 outlining the spin

speed cat egories and t he corresponding re-

duced speeds. If the switches are not acti-

vated, the final spin speed will reach a maxi-

mum of 850 rpm and t hen drop t o find t he

opt imum per f or mance level, bas ed upon

readings t aken by t he cabinet vibrat ion sen-

sor. Consumers may be confused by the up-

and-down cycling of the motor. However, the

machine is searching for t he opt imal speed

per f or mance.

2. Place ohm meter leads across the two ter-

minals of the switch. Depress the button

on the switch. If the contacts open, the

switch is good. If not, replace the switch.

St rut Displacement Swit ch

The strut displacement switch is clipped to the

top of the left rear strut. The switch senses

the outer tub bottoming out on the strut as

t he machine accelerat es above 90 rpm. This

is caused by the twisting motion of the outer

tub. This additional switch is required because

the twisting motion may not trip the outer tub

displacement swit ch. The primary cause for

activation would be an unbalance at the front

and rear of the spinner on opposite sides.

R P M

FUNCTION

The strut displacement switch is wired in se-

ries wit h t he t ub displacement swit ch and

causes the same type of redistribution.

47 ...........................Tumble

47-85 .......................Dist ribut ion

90- 250.....................Accelerat e Through

Critical

250- 499..................Accelerat e Through

Critical

Test ing t he St rut Displacement Swit ch:

500- 575..................High Speed Accelerat ion

1. Disconnect power t o t he unit .

- WILL DROP TO 450 RPM

600- 675..................High Speed Accelerat ion

- WILL DROP TO 555 RPM

>6 7 5 .......................High Speed Accelerat ion

- WILL DROP TO 650 RPM

2. Place ohm meter leads across the two ter-

minals of the switch. Depress the button

on the switch. If the contacts close, the

switch is good. If not, replace the switch.

750- 800.............TOP SPIN SPEED

Figure 2- 12

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SECTION 2. ELECTRICAL COMPONENTS & TESTING

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spring rat e of t he absorber; and changes in

the pulley-belt ratio. It can also change from

run to run due to the size of the clothes load

and type of floor. The sensor finds the opti-

mum speed on every run. The optimum speed

is between 750 and 850 rpm.

Inert ial Unbalance Swit ch

The inertial unbalance switch is located on the

upper right hand side of the outer tub, in front

of the top concrete weight. The switch con-

sist s of a moving weight in t he swit ch body

which presses against the switch contacts. If

t he unbalance of t he out er t ub becomes t oo

erratic, the moving weight will open the con-

tacts in the switch. When the machine con-

troller senses the switch opening, the machine

controller will reduce the spin speed to 650,

550, or 450 rpm depending on t he current

speed closest to the level spin speed (i.e. 625

rpm trip would drop to 550 rpm) (See Figure

2- 12).

Cabinet Vibrat ion Absorber

This is a tuned absorber mounted in the door.

The tuned absorber consists of a mass sus-

pended by springs tuned to vibrate at approxi-

mately 800 rpm. The mass vibrates 180 de-

grees out of phase with the vibration of the

cabinet. This cancels out much of the vibra-

tion caused by the clothes load at 800 rpm (See

Sect ion 5: Cabinet Assembly).

Test ing t he Inert ial Unbalance Swit ch:

Testing of the switch may prove difficult. The

swit ch will not open unless t he swit ch is

moved side to side creating a "G" force of 8 - 9

Ft. lbs.

1. Disconnect power t o t he unit .

2. Place ohm meter leads across the two ter-

minals of t he inert ial swit ch. Move t he

switch side to side. If the contacts do not

open easily, t he swit ch is good. If t he

switch contacts are open or easily tripped,

replace t he swit ch.

Cabinet Vibrat ion Sensor

The cabinet vibration sensor is mounted to the

lower left corner of t he machine cont rol

board. This is a piezo-electric strip mounted

t o t he machine cont rol board. Wit h a mass

attached to the end of the strip, the machine

cont roller monit ors t he cabinet vibrat ion as

the machine reaches top speed. The machine

controller uses the vibration sensor to attempt

to spin the washer at the optimum speed with

the least amount of vibration. Optimum speed

changes from machine t o machine due t o:

changes in mass of t he absorber; changes in

16008373- 01

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SECTION 2. ELECTRICAL COMPONENTS & TESTING

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2- 14

SECTION 3. TROUBLESHOOTING

Washer Runs Five Minutes Then Shuts OFF:

Warning - Always shut off

electrical power to the

unit before beginning any

service repair procedures.

During the wash cycle, the machine control

communicates with the timer, via the timer in-

put circuits. If the machine control board does

not see a change in timer inputs over a period

of 5 minutes, it will open the line relay and shut

the washer off. Check the timer input circuits

for poor connections at the timer and the ma-

chine control board. Replace timer if neces-

sary (See Section 2: Timer Input Circuits).

Shuts OFF When Push-To-Start Button Re-

leased:

Check for proper wiring of BK 27 to COMM

and GY 26 to NO. If reversed, the washer will

shut off when button is released. If wiring is

proper, replace machine control board. Line

relay may be bad (See Section 1: Push-To-

Start Line Relay Operation).

Shuts OFF In The Middle Of The Spin Cycle:

During the spin cycle, the machine control

monitors the door lock mechanism to ensure

the door is locked. This is done through the

door lock enable switch. During "lock mode,"

the shaft of the door lock mechanism is

pressed forward by the door lock wax motor,

and the shaft presses in the button of the door

lock enable switch. If the machine control

board sees the switch OPEN during the spin

cycle, the machine control board will auto-

matically shut the washer OFF. This is caused

by a weak spring in the door lock wax motor.

Replace the complete door lock mechanism.

Runs For Five Seconds Then Shuts OFF:

Suspect a communication problem between

motor, the motor control board and the ma-

chine control board. Check the motor and

motor control system by removing the JP4

connector on the motor control board. Set

the timer dial into the delay cycle and then

press the push to start switch. If the motor

operates and the washer goes into a 50 rpm

tumble, then the source of the problem is the

RD 30 wire leading from the motor control to

the P4(2)/RD30 connector on the machine

control board. When the machine control

tells the motor control to run the motor, it

monitors the red wire to determine if the mo-

tor is actually running. If the board does not

see a return signal, the washer will shut down.

Shuts OFF During Final Rinses:

The machine control board is programmed to

allow a maximum continous fill time of six

minutes or an accumulated fill time of 8 min-

utes for each full wash cycle. If the required

fill time exceeds the time limit, the washer will

shut down. This is to prevent flooding in the

event there is a loose hose clamp or damaged

air dome hose. Check the incoming water lines

for a minimum pressure of 20 psi. If lower,

the customer can use smaller clothes loads

and reduce the pressure to 10 psi. An alterna-

tive solution would be to change the plastic

inlet screens to metal screened washers and

remove the nozzle extender found in the wa-

ter valve inlet hose near the dispener inlet.

If RD30 wire is making contact, then suspect

possible problems with timer input circuits.

(See the following section on Machine Op-

eration Does Not Match Cycle Description):

3 - 1

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SECTION 3. TROUBLESHOOTING

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Tumbles Only:

Excessive Vibration:

Ensure that shipping bolts and straps have

been removed from the washer. Check the

levelness of the washer and ensure the level-

ing leg nuts are tightened up against the cabi-

net. Check the tightness of the upper and

lower weights on the outer tub. Check for

loose cabinet screws. Place hand on side of

cabinet to determine if vibration noise due to

cabinet flex. Apply sound dampening pad to

inner cabinet wall if necessary. Check the un-

balance circuit and wiring for continuity at the

machine control (P2(4) to P3(1). Continuity

should be present. If not, check the wiring

connections at the strut, outer tub and interial

unbalance switches. If a switch is bad or a

wire off, the machine control will not know

when an unbalance occurs. The machine con-

trol board checks the state of the circuit prior

to beginning the spin cycle, then monitors the

circuit throughout the cycle. If the circuit is

OPEN, the board will not see “a change in

state” whenever one of the normally-closed

switches is activated during an unbalanced

load condition.

When the door lock mechanism is in the

"locked" mode, the wax motor has extended,

forcing the latch axle to engage the door lock

enable switch. This ensures the door is fully

locked and the switch can then complete the

signal back to the machine control board in-

dicating the door is locked.

Check connector

P3(7)/YL 36 wire to verify if the terminal is

making good contact to the board terminal.

Check the door lock enable switch for conti-

nuity when the button is depressed. Replace

door lock mechanism if necessary.

ContinuesTo Tumble After The Wash Cycle

Is Finished:

Check for a stuck button on the door lock en-

able switch in the door lock mechanism. You

can verify this at the machine control board

by checking for continuity across P3(7)/YL 36

to P3(1)/RD23. If the door is unlocked and

there is continuity, the switch button is stuck.

At the end of the wash cycle, the machine con-

trol monitors the door lock enable switch for

disengagement. If the switch is stuck, the

washer will continue to tumble till the door

unlocks, even though the door is actually un-

locked. Replace the door lock mechanism.

Machine Operation Does Not Match Cycle

Description:

The machine control board monitors where

the timer is in the cycle and then uses this in-

formation to start different operations, such

as drain, fill, tumble and spin. Four input wires

from the timer to the machine control board

inform the machine control board where the

timer is in the wash cycle. However, if one or

more of these wires are making an intermittant

contact with the machine control board, the

board can be “misinformed” and will not re-

spond properly.

Third Rinse Cycle Is Always Cold:

If the user rotates the timer dial to the third or

fourth rinse, the water will always be cold re-

gardless of temperature selection. The ma-

chine control board counts the number of

rinses through the wash cycle. When the third

and fourth rinse are reached, the board will

check the rinse temperature selection for

proper fill temperature (See Section 1:Water

Temperature Inputs).

Check the connections of the timer input wires

leading from the timer to the machine con-

trol board (See Section 2: Timer Input

Charts). Also, check wiring of all console

switches to ensure no cross-wiring of 24 VDC

and 120 VAC circuits.

3 - 2

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SECTION 3. TROUBLESHOOTING

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Door Leaks:

Dispenser Does Not Dispense:

Usually this occurs when the door is re-

mounted into the shroud and the technician

fully tightens the top hinge screw prior to in-

serting the lower screw. The technician should

fully seat the door into the shroud evenly prior

to tightening the hinge bracket screw into the

shroud. Check also for excess plastic flashing

in the tab area of the plastic shroud. Care-

fully remove the excess flash and remount the

boot gasket.

Examine the siphon cap to see if the cap was

twisted, causing the cap to seal the siphon

tube against the bottom of the siphon cup. Re-

position cap to lift the siphon tube off the bot-

tom of the cup. The wax motors are activated

a full 30 seconds prior to turning on the water

valves. If the timing is not correct, suspect a

bad wiring connection. Also, examine the link-

age of the acutuator arm and proper location

of the spring on the wax motor (See Section

6: Water Carrying Components).

“Thumping” Noise In Spin:

Clothes Wet:

The noise could be from loose lower front

weight mounting bolts or a loose bolt secur-

ing the driven pulley. Check the belt for a weak

seam and replace if necessary. Check the

motor adjustment bolt for tightness.

Possibly due to the washer shutting down too

soon or execessive suds present. Did the timer

advance to OFF? If yes, then excessive suds

may be the cause or the intertial unbalance

switch tripped too soon, resulting in lower spin

speeds. Change the inertial switch if suds were

"Ticking or Knocking" Noise In Spin:

not detected.

Note: If the timer motor is en-

The noise could be from a loose wire harness,

plastic purse-lock wire harness retainer on

upper hose hitting the topcover or a plastic

injection mold standoff on the outer tub bear-

ing housing may possibly be interfering with

the driven pulley.

ergized for five minutes without the cycle in-

puts changing, the machine control board will

drop the line voltage relay.

Also, check the drive belt for a weak spot on

the belt. Ussually felt on the backside of the

belt as a "flat" spot. Replace the belt.

RF (Radio Frequency) Interference:

The interference could occur if the RPT shut-

ter on the motor was misaligned or a motor

terminal has been pushed inward slightly

when the motor harness connector was

placed on the motor. Remove the motor phase

harness connector and check the motor ter-

minals. Replace the motor if the motor

teminals are loose.

3 - 3

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TROUBLESHOOTING

3 - 4

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3 - 5

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3 - 6

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3 - 7

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3 - 8

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TROUBLESHOOTING

3 - 9

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TROUBLESHOOTING

3-10

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TROUBLESHOOTING

3-11

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TROUBLESHOOTING

3-12

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TROUBLESHOOTING

Use a knife or scissors to cut across the + in the center of the dial and press the template over

the timer shaft. Align the template with the OFF indicators of the Quick Wash and Regular wash

on the facia. Press the timer knob onto the timer shaft.

3-13

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MISCELLANEOUS

INFORMATION

Energy Usage:

The energy usage averages up to 0.10 Kwh per cycle, when using the Regular cycle with Nor-

mal wash. Peak amperage is 7.5 amps during acceleration to high speed spin, with nominal

running amperage at a maximum of 5.0 amps.

Washer Wattages:

The following wattages are approximate and without clothes:

Function:

Delay

Wattages:

10-15

Tumbling (empty) & water fill

Tumbling (Full-Wash level)

Tumbling (Full-Rinse Level)

Draining (No tumble) with water

Draining (No tumble) no water

Spinning (100 rpm)

50-70

110-120

140-150

45-50

30-35

85-90

Spin Acceleration (100-200 rpm)

Spinning (400 rpm)

Spinning (850 rpm)

130-150

160-170

400-410

3-14

16008373-01

SECTION 3. TROUBLESHOOTING

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SECTION 4. CONSOLE

5. Push the bottom of the console toward

the back panel to disengage the six lock-

ing feet from the top cover (Figure 4-3).

Warning - Always shut off

electrical power to the unit

before beginning any service

procedure.

R E M O V A L

1 . Disconnect power to the unit.

2. Remove the three screws securing the con-

sole rear cover plate across the rear top

edge of the console (Figure 4-1).

Console

Mounting

Screws

Figure 4-3

6. Carefully lift and roll the console forward

onto the top cover. You now have access

to the console components and wiring

(Figure 4-4).

Figure 4-1

3. Lay a drop cloth across the top cover of the

washer.

4. Grasp the top of the console and gently rock

the top forward (Figure 4-2).

Figure 4-4

7. To Reinstall: Roll the console back into

an upright position, engaging the locking

feet into the slots in the top cover. Re-

place the three screws to attach console

back to rear panel.

Figure 4-2

16008373-01

SECTION 4. CONSOLE

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16008373-01

SECTION 4. CONSOLE

VERTICAL SWITCHES

(Push Button)

HORIZONTAL

(Push-to-Start)

SWITCHES

R E M O V A L

Depress the locking tab on the switch to

disengage it from the locking tab on the

console. Pivot the switch from the console

(Figure 4-6).

Depress the tab at the top of the switch with

a screwdriver to disengage the tab from the

console. Pivot the switch away from the

console to remove (Figure 4-5).

REPLACEMENT

Position one side into the console and pivot

the other tab into the console and apply enough

pressure to engage the tab into the console.

Align the rib on the bottom of the switch with

the slot in the console. Pivot the switch up

into the console until the tab engages the

console securely. Check that the locating tabs

on either side of the switch's lower alignment

rib are in position to properly center and lock

the switch into the lower part of the switch

opening.

Locking Tab

Align the Center Rib

on the bottom of the

Switch with the Slot in

the Cup on the Bottom

of the Switch Opening

on the Console

Screwdriver

Locking Tab

Carefully Depress

Locking Tab on

Switch to Disengage

From Console

Pivoting the

Switch Body, Lock

it in at the Top of

the Opening

Figure 4-6

Figure 4-5

on the Console.

4 - 2

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TIMER REMOVAL

REPLACEMENT

1 . Disconnect power to the unit.

1 . Align the three tabs of the timer into the

slots of the console.

2. Carefully lift the timer knob and dial off

the timer shaft by pulling the knob away

from the face of the control console

(Figure 4-7).

2. Insert the timer into the slots and

slightly lift the locking tab of the timer.

Slide the timer away from the endcap

until the locking tab can engage with the

square hole in the console.

3. Replace mounting screw.

Figure 4-7

3. Disengage the console assembly from

the top cover and roll forward (See

Console Removal).

4. Remove timer mounting screw on back

of timer in the console.

5. Slightly lift the locking tab on the back of

the timer (Figure 4-8).

6. With the locking tab lifted, slide the timer

body toward the end cap of the console.

This will disengage the retaining tabs of

the timer from the slots in the console.

Figure 4-8

7. Lift the timer away from the console.

16008373-01

SECTION 4. CONSOLE

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16008373-01

SECTION 4. CONSOLE

4 - 4

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SECTION 5. CABINET ASSEMBLY

Warning -Alwaysshutoff

electricalpowertotheunit

beforebeginninganyser-

vicerepairprocedures.

DOOR ASSEMBLY & HINGES

Thedoorassemblyisreversible. Itcontains

aninertialvibrationdampercomprisedofa

steel plate suspended with springs. The

damperisdesignedtotuneoutexcessivevi-

Figure5-1

REVERSAL

brationsgeneratedbythemachineduringthe

spincycle. Replacementinnerdoorlinersare

shippedwiththevibrationdamperinplace.

1. Repeat the above steps and, remove the

correspondingsheetmetalspacersonthe

oppositeside.

REMOVAL

2. Remove the hinges from the door and re-

locatethemtotheothersideofthedoor.

1. Open the door and remove the center

screw of each hinge secured to the inner

flangeofthefrontpanelinthedoor

opening.

3. Remount the door into the new slots and

securewithonescrewintoeachhinge.

2. Grasp the door with both hands and lift

thehingeareaslightly. Drawthedooras-

sembly away from the machine. This will

disengagethehingesfromtheslotsinthe

frontshroud(Figure5-1). Ifthehinges

bind, pressoutontheplasticshroudnear

thehingetowardthecabinet.

4. Mount the sheet metal spacers onto the

sidewherethehingeswerepreviouslyto

coverthehingeslotsinthefrontshroud.

DISASSEMBLY

1. Removetenscrewslocatedacrossthebot-

tom and along either side of the door

panel. Thetopedgeoftheouterpanelis

foldedovertheinnerdoorplug.

2. With the outer door panel removed, the

stabilizerisexposedandisattachedtothe

innerdoorplug.

16008373-01

SECTION 5. CABINET ASSEMBLY 5-1

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2. Open the door and remove the four screws

alongtheinsidelipofthedooropening.

Thetwothatarelocatedvertically,onei-

thersideofthedooropening, securethe

frontpaneltothefrontshroudassembly

(Figure 5-3). Care should be taken when

opening and closing the door with the

screws removed.

CabinetVibrationAbsorber

Thepurposeofthecabinetvibrationabsorber

istoprovideadampeningeffecttothewasher

during the spin cycle. By dampening the

machinevibration,thewasherisabletomain-

tain and achieve optimum spin performance.

Thestabilizerisattachedtotheinnerdoorplug

withtwoscrews.

3. Remove the door.

Door Latch Hoop

Inner Door Liner

Figure5-3

4. Toremovethefrontpanel, openthedoor,

twisttheupperrightandleftpanelexten-

sions inward by pressing in on the outer

upperedgesofthefrontpanelposts. This

willdisengagethefrontpanelpostsfrom

clips located on the face of the cabinet

flange(Figure5-4).

Cabinet Vibration Absorber

Figure5-2

Door Latch Hoop

5. Tiltthetopofthefrontpanelawayfrom

thewasher. Then, removethefrontpanel

(Figure5-4).

Thedoorlatchhoopissnappedintothedoor

liner. Aspringretainsthehoopintheproper

position to align with the door lock mecha-

nismwhenthedoorisclosed. Aplasticsup-

portissnappedintoplaceoverthelatchhoop

ataddstrength(Figure5-2).

FRONT PANEL

REMOVAL

Figure5-4

1. Disconnectpowertotheunit.

5-2

16008373-01

SECTION 5. CABINET ASSEMBLY

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TOP COVER

DOOR LOCK MECHANISM

REMOVAL

The purpose of the door lock mechanism is

to secure the door during the spin cycle.

When the door is shut, the wire loop on the

door engages the rotating gear in the door

lock mechanism (Figure 5-7). When the

proper water level is reached and the pres-

sureswitchissatisfied,120VACisappliedto

the wax motor. The piston in the wax motor

willextend,pushingthelatchaxleandsliding

gearfromlefttoright. Teethonthefaceof

theslidinggearwillintermeshwiththeteeth

onthesideoftherotatinggear(normallytakes

about45-60seconds). Thisinterlockingof

teethprovidesthelockingactionofthelock

mechanism.

1. Remove the front panel (See Front Panel

Removal).

2. Removethefourscrewsfasteningthedis-

penser bezel to the top of the top cover

(See Dispenser Assembly).

3. Remove two 5/16" hex head screws secur-

ingthetwoholddownbracketsonthetop

cover(Figure5-5).

4. To remove the hold down brackets, swing

the bracket to the outside to unhook the

bracketfromtheslotinthetopcoverlip

(Figure5-6).

At the end of the spin cycle, when tumbler

speed drops below 90 RPM, voltage is no

longer applied to the wax motor. The wax

motor will cool and relax the piston on the

wax motor. The latch axle and sliding gear

arethenpulledfromrighttoleft,disengaging

theteethoftheslidinggearfromtherotating

gear(normallytakes1-1½minutes). Thisal-

lowstherotatinggeartobeinapositionto

rotate if necessary, should the door be

opened.

5. Ifthedoorisstillpositionedonthefront

shroud, openthedoorpriortoliftingthe

frontofthetopcoverandtiltthetopcover

towardtherearofthemachine.

Rotating

Gear

Wax Motor

Sliding

Gear

GearReturn

Spring

Door Lock

Switch

Accessory

Cable

LatchAxle

Axle Spring

Lamp

Holder

Figure5-5

Figure5-6

Door Switch

Ramp

Latch

Switch

Holder

Bulb

Cover

Figure5-7

16008373-01

SECTION 5. CABINET ASSEMBLY 5-3

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Two switches in the door lock mechanism in-

form the machine microprocessor control

when the door is latched shut and when the

door is securely locked. For more informa-

tion,refertosectiononElectrical-Mechanical

Troubleshooting.

Emergency Access Cord

Mounting Screws

An emergency access cord (filament) is at-

tached to the sliding gear, should the wax

motorfailintheextendedpositionandentry

intothewasherisnecessary. Togainaccess

tothecable,removalofthedispenserbezelis

necessary. Once removed, the cable is ex-

posed. By carefully applying both a steady

pulloftheaccesscordandopeningforceto

thedoor, thewaxmotorisoverriddenandthe

slidinggearispulledfromrighttoleftaway

from engagement with the rotating gear.

Thus,allowingtherotatinggeartoreleasethe

wireloopofthedoor.

Figure5-8

FRONT SHROUD ASSEMBLY

The shroud assembly ties the sides of the

cabinettogetheracrossthefrontforstabil-

ityandprovidessupportformountingofthe

door assembly, front panel and door lock

mechanism. To gain access to components

behind the front shroud, the assembly can

be removed as a whole assembly and lifted

ontothetopofthewasher. Thiswillallow

access to the tub cover, spin basket, sump

areaandetc..

NOTE: When the cord is released, the lock

willreturntoalockedposition(Figure5-8).

REMOVAL

1. Removethefrontpanelandraisethetop

cover to expose the door lock mechanism

(SeeFrontPanel&TopCover).

REMOVAL

2. Removethewiresfromthelockswitches,

waxmotorandlightfixture.

1. Removethefrontpanelandraisethetop

covertoexposethefrontshroudassem-

bly(SeeFrontPanel&TopCover).

3. Removelight.

2. Withthedooropen, unsnapthebootgas-

ketfromaroundtheinsideperimeterof

the door opening by pulling out on the

sealinglipofthegasket(Figure5-9).

4. Remove two 5/16" hex-head screws secur-

ingtheswitchsupporttothemetalshroud

support(Figure5-8).

5-4

16008373-01

SECTION 5. CABINET ASSEMBLY

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CABINET ASSEMBLY w/REAR

ACCESS PANEL

Removal of the access panel gains access to

the rear components of the washer

(Figure5-11).

Figure5-9

3. Remove the door (See Door Assembly and

Hinge Removal).

4. Removal and replacement of the screws

inthefollowingorder,asillustrated,isnec-

essarytoprovideproperalignmentofthe

parts. Failuretodosowillhinderremoval

and replacement of the shroud onto the

cabinet(Figure5-10).

Figure5-11

REMOVAL

Remove the four hex-head screws surround-

ingtheaccesspanel (Figure5-12).

Spacer

Screws

Figure5-10

5. Placeasoftclothoverthetopofthecon-

creteweight. Carefullyliftandstandthe

shroud assembly on top of the tub. The

assembly can lean back against the top

cover. Thewireharnessontheleftsideof

theuppercabinetislongenoughtodothis.

Whenreplacingtheshroud, besuretotuck

theharnessinsidetheupperflangeofthe

top cover to keep the wires from being

pinched and damaged.

Access Panel

Figure5-12

16008373-01

SECTION 5. CABINET ASSEMBLY 5-5

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5-6

16008373-01

SECTION 5. CABINET ASSEMBLY

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SECTION 6. WATER-CARRYING COMPONENTS

5. While pulling the bracket away from the

Warning-Alwaysshutoff

electricalpowertotheunit

beforebeginninganyser-

vicerepairprocedures.

cabinet,rotatetheleftsideofthebracket

away from the washer.

6. Remove the wire harness from the water

valvecoils(Blue&Whitewires-Cold;Or-

ange & White wires - Hot) and remove the

clampfromtheinjectorhose.

WATER VALVE

7. Remove two 5/16" hex head screws secur-

ingthevalvetothemountingbracket.

Thewatervalveisaccessiblefromthefront

orrearofthemachine.

FRONT REMOVAL

REAR REMOVAL

1. Disconnectpowertotheunit.

2. Shutoffthewatersupplytotheinlethoses.

3. Remove the front panel.

1. Disconnectpowertotheunit.

2. Shutoffthewatertotheinlethosesand

remove the hoses from the water valve

connectionsofthewasher.

4. Removedispenserbezelandraisethetop

covertoexposetheupperrearcabinetarea

(See Front Panel & Top Cover Removal).

3. Remove the two ¼" hex head screws se-

curingthewatervalvebrackettothecabi-

net(Figure6-1).

5. Remove the wire harness from the water

valvecoils(blue&whitewires-cold;or-

ange & white wires - hot) and remove the

clamp from the injector hose. When the

valveisreplaced,thehotwatervalvecoil

isontheleft.

Injector

Hose

Mounting

Screws

6. Remove the two 5/16" hex head screws se-

curingthewatervalvebrackettothe

cabinet.

Water

Valve

Mounting

Bracket

7. Carefullyliftthevalveanddirecttheinlet

hoses through the openings in the rear

mounting bracket.

Mounting Screws

Figure6-1

8. Remove the inlet hoses from the water

valveconnections. Ifpossible,clampthe

hoses shut and/or have a towel handy in

caseofoverspraywhenwaterpressureis

relieved.

4. Whilepullingthelowerendofthebracket

downslightly,slidethebrackettotheleft.

Thiswillallowtheinjectorhosetoclear

therearcabinetopening.

16008373-01

SECTION 6. WATER CARRYING COMPONENTS 6-1

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7. Toreplace, insertairdomehoseintothe

bracket. Insertthepressureswitchnipple

into the air dome hose. Press the pres-

sureswitchintothebracketuntilit"snaps"

intoplace.

WATER LEVEL PRESSURE

SWITCH

The water pressure switch is located in the

console area and mounted to a galvanized

bracketsecuredtotherearpanelofthecon-

sole. Theairdomehoseisinsertedintothe

lowerendofthemountingbracket (Figure

6-2). Thenippleofthepressureswitchisin-

sertedintotheendoftheairdomehosewhich

issecuredbythelowermountingbracket.

AIR DOME HOSE

The air dome hose connects the pressure

switch to the air dome located in the sump

areaoftheoutertub. Routingoftheairdome

hose passes from the console down the rear

wallofthecabinettotherearsumpareaof

theoutertub. Two holdingclipsretaintheair

dome hose to the cabinet away from the belt

andpulley.

Bracket

A)Slide

Switch Off

Pressure

Switch

REMOVAL FROM CONSOLE

B)Rotate

Switch

1. Disconnectpowertotheunit.

Air Dome

Hose

2. Remove the console (See Console

Figure6-2

Removal).

REMOVAL

3. Slidethepressureswitchuponthemount-

ingbracket, awayfromtheairdomehose.

The mounting bracket for the pressure

switchissecuredtotherearpanelofthe

console(SeeFigure6-2).

1. Disconnectpowertotheunit.

2. Remove the console (See Console

Removal).

4. Pull the air dome hose down through the

topcoveropening.

3. Slide the pressure switch up, away from

theairdomehose.

REMOVAL FROM OUTER TUB

4. Remove wire harness from the pressure

switch.

1. Disconnectpowertotheunit.

5. Rotatethepressureswitch90degreesto

disengagelockingtabsonthebackofthe

switch from the mounting bracket.

2. Frombehindtheoutertub, slideoffthe

retainerclipsecuringtheairdomehose

totherearspoutoftheoutertub.

6. The mounting bracket for the pressure

switchissecuredtotherearconsolepanel

withonescrew.

3. Removeoneoftherearbaffles.

4. Grasp and lift the airdome hose from the

sumparea(SeeFigure6-3).

6-2

16008373-01

SECTION 6. WATER CARRYING COMPONENTS

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5. Remove all slack in the hose between the

upperandlowerclipsholdingtheairdome

hose. Thisreducesthepotentialfornoise.

5. Pulltheairdomeandhoseoutthroughthe

sump opening in the spin basket (Figure

6-3).

6. Route the air dome hose into the center

rearholeinthetopcover. Routetoward

the pressure switch and secure the hose

tothepressureswitch.

REPLACEMENT/ROUTING

1. Threadthenarrowendofthehosethrough

theairdomeoutletintherearoftheouter

tub(Figure6-3). Applyalcoholtolubri-

cate the hose to ease insertion into the

outertubairdomeoutlet.

DISPENSER ASSEMBLY

NOTE: Using soap and water may lead to a

potentialleak.

Thedispenserassemblyislocatedintheleft

handsideofthetopcover. Threebaysdis-

pensethefabricsoftener, bleachanddeter-

gentintothewashload. Adoublewaxmotor

mechanismdirectstheflowofwaterintoeach

specificbaywhenrequiredfordisbursement

intothewashload. Whenaspecificfluidis

required,thewaterisdirectedintothatbay.

Aswaterfillsthebay, thefluidlevelrises.

Whenthefluidreachesaspecificheight,itis

siphonedoutintothedispenserinjectorhose

tothewashload.

SpinBasket

Sump

Opening

Exposed

Rear

Baffle

Removed

Air Dome

Outlet

Wax Motors

Figure6-3

Siphon Cap

Linkage

Dispenser

Top

2. Secure the retainer clip on the outside

ridgeoftheairdomehose.

Rotary

Nozzle

3. Push the bent end of the air dome down

intothesumparea, belowthespinbasket,

makingsuretheflatrubbertabontheair

dome is down inside the drain sump

opening.

Siphon Cup

Dispenser Bottom

Figure6-4

4. Theairdomehoseisretainedtothe

rearwallofthecabinetwithtwoclips.

REMOVAL

NOTE: Asilverindicatormarkislocated

approximately 20 inches away from the air

dome. The indicator mark must be located

underthelowercliptoallowthecorrect

amountofslackinthehose.

1. Disconnectpowertotheunit.

2. Remove the siphon cup and cap.

3. Removethefourscrewssecuringthedis-

penser bezel and assembly to the top

cover.

16008373-01

SECTION 6. WATER CARRYING COMPONENTS 6-3

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5. Remove the hose clamp and injector hose

fromthespoutonthefrontupperareaof

theoutertub.

4. Removethefrontpanelandtopcover(See

Front Panel & Top Cover Removal).

5. Disconnectthehosesattachedtothedis-

penser assembly.

6. Inordertoprovidesufficientspacetore-

movetheinjector,placea5/8"-3/4"wedge

betweenthespinnerandtheoutertub.

6. Whilelifting,rotatethedispenserassem-

bly90degreesinacounterclockwise

direction.

7. Pinch the two tabs exposed on the outer

edgeoftheoutertubspoutandpressthe

injectorintothetub. Reversetheprevi-

ousstepstoreplacetheinjector.

NOTE: The two tabs on the side wall of the

dispenser bottom may break off if the above

procedureisnotfollowedproperly.

PUMP ASSEMBLY

FRONT WATER FLUME INJECTOR

The pump assembly is mounted to the right

rearareaofthebase.

Aswaterisfillingthedispenserassembly,

waterisalsodivertedtoahoseleadingtothe

frontoftheoutertub.

REMOVAL

As the water enters

1. Disconnectpowertotheunit.

the top of the outer

tubthroughthehose,

2. Spreadatowelbelowthedrainhosesprior

to loosening the hose clamps. This will

catchanyresidualwaterleftinthehoses

and sump area.

it passes through a

water flume. The

flumedirectsthewa-

tertowardthefrontof

thetubtosaturatethe

3. Remove the hose clamps and hoses from

the pump.

clothesload.

Figure6-5

4. Remove the wiring harness from the pump

motorterminals.

REMOVAL

5. Rotate the pump assembly in a counter-

clockwisedirection. Thesupportlegsof

the pump are slotted to engage in keyed

slotsinthebase. Reversethestepstore-

mount the pump.

1. Disconnectpowertotheunit.

2. Remove the front panel and raise the top

covertoexposetheupperfront

cabinetarea(SeeFrontPanel&TopCover

Removal).

3. Remove the front shroud assembly (See

Front Shroud Assembly Removal).

4. Remove the outer tub cover (See Outer

Tub Cover Removal).

6-4

16008373-01

SECTION 6. WATER CARRYING COMPONENTS

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Figure6-6

Figure6-7

CLEANING THE PUMP

The pump assembly can also be disassembled

without removing the hoses from the pump

(SeeFigure6-6).

4. Position the second pump near the first

pump and connect the accessory connec-

tortothesumpintakeofthesecondpump.

Securewiththeclampinthekit.

1. Depressthelockingtabonthefaceofthe

pump housing.

5. Connectthedrainhosetothedrainoutlet

ofthesecondpump. Securewithaclamp.

2. Rotatetheblockportionofthepumpcon-

taining the motor windings toward the

frontofthewasher. Thiswilldisengage

thelockingtabsofthepumphousingfrom

the pump face.

6. The second pump assembly is not secured

tothewasher'sbaseframe.

7. Installationiscomplete.

3. Carefully remove the pump body away

from the housing. The drain impeller is

exposedforcleaning.

Pump Accessory Kit

1. Disconnectpowertotheunit.

2. Disconnectthedrainhosefromtheexist-

ing pump in the washer.

3. Attach the accessory connector to the

pump drain outlet and secure with the

clampfoundinthekit.

Figure6-8

16008373-01

SECTION 6. WATER CARRYING COMPONENTS 6-5

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DRAIN HOSE

The drain hose attaches to the pump and is

routedthroughthelowerrearwallofthecabi-

net. Thedrainhoseisprotectedexternallyby

ashield.

Drain Hose

Access

Cover

REMOVAL

1. Disconnectpowertotheunit.

Figure6-9

2. Remove the four ¼" hex head screws se-

curingtheaccesspaneltotherearwallof

thecabinet.

3. Remove the ¼" hex head screw securing

thedrainhoseshield. Removeshield.

4. With access into the machine compart-

ment, spread a towel under the connec-

tionofthedrainhosetothepump. Loosen

theclampandremovethedrainhose(Fig-

ure6-10).

Clamp

5. Reversethepreviousstepsfor

replacement.

Drain Hose

Figure6-10

6-6

16008373-01

SECTION 6. WATER CARRYING COMPONENTS

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16008373-01

SECTION 6. WATER CARRYING COMPONENTS 6-7

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SECTION 7. OUTER TUB & SPINNER ASSEMBLY

REMOVAL

Warning -Alwaysshutoff

electricalpowertotheunit

beforebeginninganyser-

vicerepairprocedures.

1. Disconnectpowertotheunit.

2. Remove the front panel, top cover and

front shroud (See Front Panel, Top and

Front Shroud Removal).

BAFFLES

3. Using one of the two hold down brackets

(See Figure 5-6) or one of the two front

supportsprings,graspthehookoftheboot

clampspring. Withtheotherhand, press

thewireloopintothedoorboot. Thiswill

brakethewireintothedoorbootandnot

allowthewiretoslip.

Thebafflesinthespinbasketdistributeand

redistributetheclothesduringthetumbling

actionofthewasher.

REMOVAL

1. Disconnectpowertotheunit.

NOTE: Be careful not to bend or crease the

wireloop. Ifthewireloopbecomesbent, the

resultwillbeapotentialleakuponreplace-

ment of the boot seal onto the outer tub

cover.

2. Thethreerearbaffleswithinthespinbas-

ket are removed by removing the two

crosshead screws securing each baffle

frominsidethespinbasket.

4. Pull the boot clamp spring hook toward

the wire loop and disengage the spring

fromthewireloop.

3. Thethreefrontbaffleswithinthespinbas-

ket are removed by removing the two ¼"

hex head screws from outside of the spin

basket. Togainaccess, removetheouter

tub cover. The front baffle mounting

screws can now be reached through the

sumparea, usingaflatratchetwitha¼"

drivesocket.

5. Carefully remove the wire loop from the

lipoftheoutertubcover.

NOTE: Notetheorientationribsontheouter

tubcoverandthelocatingnotchesinthedoor

bootseallip.

DOOR BOOT

Locking

Tabs

The door boot rubber gasket provides a seal

betweentheoutertubassemblyandthefront

shroud. Thebootsealissecuredtothefront

shroudbylockingtabsonthebootseal, which

engagewithslotsintheshroud. Attachment

totheoutertubisbyawireloopstretched

around the perimeter of the opening in the

outertubcoverandsecuredwithaspring.

Boot

Gasket

Figure7-1

16008373-01

SECTION 7. OUTER TUB & SPINNER ASSEMBLY 7-1

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7. Repositionthefrontshroudonthefront

of the washer and secure (See Front

Shroud).

6. Unsnap the locking tabs of the door boot

around the inside perimeter of the door

shroud(Figure7-1).

8. Pullthefrontedgeofthedoorbootand

locatethewidestlockingtabs, located

atthe12,4&8o'clockpositions. Insert

thelockingtabsintothelargeinterlock-

ing slots in the shroud. (Spraying the

surface with window cleaner or a soap

solutionaidsreinsertionofthetabsinto

theplasticfrontshroud.) Pressthethick

rubbersectionofthedoorbootintothe

grooveintheshroudsothelockingtabs

engageintheslots.

REPLACEMENT

1. Align the door boot with the D-shape to-

wardthefront, withtheflatoftheDto-

ward the bottom. Also, locate the large

tabtowardthetopcenteroftheshroud.

2. Stretchtherearlipofthedoorbootonto

thetubcover.

3. Movethereardoorbootlipalongtheface

ofthetubcoveruntilthelocatornotches

inthedoorbootalignwiththelocatorribs

inthetubcover. Checkalignmentofthe

sixribmarksandrepositionifnecessary.

Thisisnecessaryinordertohavethelock-

ingtabsontheinsideperimeterofthedoor

bootalignwiththecorrespondingtabson

thefrontshroud.

9. Presstheremaininglockingtabsintothe

perimeteroftheshroud.

OUTER TUB COVER

The outer tub cover has a gasket seal em-

beddedintheouterflangeofthecoverto

sealthecovertotheoutertub. Thecoveris

securedtotheoutertubbymeansoftwelve

(12)lockingclipsevenlyspacedaroundthe

perimeterofthecover. Whentheoutertub

cover is removed, access to the sump area

andthefrontinjectorflumeispossible.

4. Carefullyloopthewireloopwithspring

aroundthelipoftheoutertubcoverand

placethespringatthe11:00o'clockposi-

tion,justleftofthetopriboftheoutertub

cover. Hooktheendofthespringoverthe

nearesttubcovercliptoholdthespring

andwireinpositionforfinalhookuptothe

otherendofthewireloop.

REMOVAL

5. Usingeithertheholddownbracketorthe

outer tub spring, grasp the hook end of

the spring and apply pressure on the

clampwireintothedoorboot.

1. Disconnectpowertotheunit.

2. Remove the front panel, top cover and

front shroud (See Front Panel, Top

Cover, and Front Shroud Removal).

6. Pullthespringhook towardthewireloop

toengagethespringwiththewireloop.

3. Usingaflatheadscrewdriver, slide un-

dertheclipandprytoremove. Remove

the remaining clips from the outer tub

cover.

NOTE: Be careful not to bend or crease the

wireloop. Ifthewireloopbecomesbent, the

resultwillbeapotentialleakuponreplace-

ment of the boot seal onto the outer tub

cover.

4. Remove the cover from the outer tub.

Thisexposesthesumpareaonthefloor

oftheoutertubandthewaterinjector

flumeontopoftheoutertub.

7-2

16008373-01

SECTION 7. OUTER TUB & SPINNER ASSEMBLY

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REMOVAL

1. Disconnectpowertotheunit.

2. Removethefrontpanel, topcover, front

shroud, outertubcoverandrearbaffles

(SeeFrontPanel, Topcover, FrontShroud,

Outer Tub Cover and Rear Baffle

Removal).

3. Toseparatethespinnertubsupportfrom

thespinner, removethethreerearbaffles

withinthespinbasketbyremovingthetwo

screwssecuringeachbaffle(SeeBaffle

Removal).

Figure7-2

SPIN BASKET ASSEMBLY

w/BALANCE RING

4. Remove the three locking type nuts (½"

socket)securingthespinbaskettothespi-

derassembly(Figure7-5).

Thebalanceringissecurelyfastenedtothe

spinbasketandcannotbeobtainedasasepa-

raterepairpart. Toobtain, ordercomplete

spin basket assembly. The balance ring is

filledwithacalciumchloridesolutionand

baffles.

Figure7-4

Figure7-3

within the ring allow the fluid to disperse

withintheringevenly. Byrotatingthespin

basket, you can hear the fluid dispersing

withinthebafflesofthebalancering. This

soundisnormal.

Thespinbasketismountedtothespinnersup-

port by means of threaded studs on the sup-

port extending through the spin basket and

secured with nuts. The mounting nuts are

concealedundertherearbaffles(Figure7-4).

16008373-01

SECTION 7. OUTER TUB & SPINNER ASSEMBLY 7-3

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Profile

Washer

Spinner

Support

Washer

Locking Nut

Figure7-5

Figure7-6

5. Removethespinbasketbyliftingitoffthe

threadedboltsofthespinnersupport.

REPLACEMENT

6. When replacing the spin basket onto the

spinnersupport, replacethewashersun-

der the three locking type nuts. Secure

the½"nutsfirmly(18in.lbs.torque).

1. Slidepulleyonshaft.

2. Insert new tabbed washer and secure the

boltwitha9/16"socketedratchetwrench

(30in.lbs.torque).

NOTE: If the washer is cupped, flip the

washer on the pulley so the cupped portion

extends away from the shaft. Failure to do

socanresultinabindingofthespinnersup-

portshaftandseals.

DRIVE PULLEY

Thedrivepulleycanbeaccessedviatherear

accesspanelofthewasher. Thepulleyisse-

curedtotheshaftofthespiderassemblybya

bolt. Thedirectionofpulleyrotationcontrols

thespinactionofthespinbasket.

1. Disconnectpowertotheunit.

2. Remove the rear access panel from the

washertoaccessthepulleyarea.

3. Removetheboltandthespidershaftwill

beexposed. Carefullyslidethepulleyoff

thespidershaft,usinga"rocking/side-to-

side"motion. Ifthepulleyhasasnugfit,

use your Spanner Wrench to apply enough

leveragetoprythepulleyofftheshaft

(Figure7-6).

7-4

16008373-01

SECTION 7. OUTER TUB & SPINNER ASSEMBLY

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SPINNER TUB SUPPORT

Thespinnertubsupportattachestothespinbasketandtheshaftofthespiderextendsthrough

asealsystemtotheexterioroftheoutertubwithapulleyattachedtotheendoftheshaft

(Figure7-7). Thisassemblysupportsthespinbasketandtransferstherotationofthedrive

pulleydirectlytotherotationofthespinbasket.

NOTE: When the spinner tub support is removed, the shaft seal system should be replaced.

Plastic

Washer

Seal

Spacer

Sleeve

(SeeFigure7-5)

Spin

Basket

Spinner

Support

Figure7-7

REMOVAL

1. Disconnectpowertotheunit.

2. Removethefrontpanel, topcover, frontshroudandoutertubcover(SeeFrontPanel, Top

Cover, Front Shroud and Outer Tub Cover Removal).

3. Removethedrivepulley(SeePulleyRemoval).

4. Withthepulleyremoved, thespinbasketwiththespidershaftcanbepulledfromthefront

oftheoutertubassembly.

5. Toseparatethespinnertubsupportfromthespinner, removethethreerearbaffleswithin

thespinbasketbyremovingthetwoscrewssecuringeachbaffle(SeeBaffleRemoval).

6. Removethethreelockingnuts(½"socket)securingthespinbaskettothespiderassembly.

7. Removetheshaftseal(Figure7-8).

REPLACEMENT

1. Reversetheprevioussteps.

2. IMPORTANT: Secure the three locking nuts (½" socket) on the spinner tub support studs

(18in.lbs.torque).

16008373-01

SECTION 7. OUTER TUB & SPINNER ASSEMBLY 7-5

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SEAL SYSTEM

Amulti-lippedwatersealispositionedonthe

tubsupportshaftleadingtotheoutertubbear-

ing. Thispreventswaterinsidethetubfrom

reachingthebearings. Thewatersealisac-

cessedbyremovingthetubsupportshaft. It

iscomprisedofastainlesssteelsealfacepo-

sitionedonthetubsupportshaft,whichmates

witharubbergasket. Greaseonthefaceof

therubbergasketprovideslubricantforthe

steelsealface. Thesteelsealfaceprovides

therotatingsealsurfaceagainstthecircular

rubberribsinthefaceoftherubberseal. This

makesforthreeribcontactsatvariousdiam-

eters,providingthreeseals.

Figure7-9

4. Reach inside the outer tub bearing area

andremovetherubberseal. Discardboth

thesteelsealwasherandtherubberseal

(Figure7-9).

REMOVAL

1. Disconnectpowertotheunit.

5. Position the spacer, replacement rubber

sealandsteelsealwasherintotheouter

tubbearingarea.

2. Removethespinnertubsupportwithspin-

ner (See Spinner Tub Support Removal).

6. Positionthespinnerwithspinnersupport

shaftintotheoutertubandinserttheshaft

throughthesealintherearoftheouter

tubuntilthespinnersupportshaftseats

intoplace.

7. Reposition the drive pulley with tabbed

washer onto the spinner support shaft.

Inserttheretainingboltandtightense-

curely(30in.lbs.torque). Thiswilldraw

theshaftandsealsintoproperalignment.

Figure7-8

3. Withaflatheadscrewdriver, prytheseal

carefullyoffthetubsupportshaft(Figure

7-8).

7-6

16008373-01

SECTION 7. OUTER TUB & SPINNER ASSEMBLY

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REMOVAL OF UPPER WEIGHT

1. Disconnectpowertotheunit.

2. Lifttopcover(SeeTopCover).

OUTER TUB ASSEMBLY

Theoutertubassemblyissuspendedfromtwo

springspositionedtowardtheupperfrontof

thecabinetandsupportedintherearbytwo

struts which are secured to the base frame.

Twocounterweightsaremountedtotheouter

tub from above and below the tub. The alu-

minumbearinghousingretainsbothinnerand

outer bearings for the spinner tub support

shafts.

3. Remove the two ½" counter balance bolts

securingtheweighttothetopoftheouter

tubassembly.

NOTE: The bolts screw into two nuts below

theweight, underthetubmountingpad(Fig-

ure7-11).

Counter

Balance

Bolt

Front

Water

Flume

Upper

Weight

Upper

Weight

Nut

Figure7-11

Displacement

Switch

REMOVAL OF LOWER FRONT WEIGHT

1. Removethefrontpanel(SeeFrontPanel).

Figure7-10

2. Removethetwoboltssecuringtheweight

to the outer tub assembly. Use a 9/16"

socket(Figure7-12).

BEARINGS

3. Lowerthefrontweightandguardagainst

hittingthemotorcontrolmicroprocessor

board mounted to the base assembly.

Thebearingsarenotrepairableorreplaceable.

Replacement of the complete outer tub as-

semblyisrequired.

Front

Weight

COUNTER WEIGHTS

Twocounterweightsaresecuredtotheouter

tub assembly. One is secured to the top of

thetubassemblyandtheotherissecuredto

thebottomofthetubassembly.

Strap

Counter Balance

Bolt

Figure7-12

16008373-01

SECTION 7. OUTER TUB & SPINNER ASSEMBLY 7-7

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STRUT ASSEMBLY

Isolator

Strut

Two struts are mounted to the base and in-

sertedintorubberisolatorsintherearofthe

outertubassembly. Thestrutsprovidesus-

pensionsupporttotheoutertubassembly.

Push Rod

RearStrut

REMOVAL

1. Disconnectpowertotheunit.

2. Remove the front panel, top cover and

frontshroud (SeeFrontPanel, TopCover

and Front Shroud Removal).

Isolator

3. Disconnect dispenser hoses and injector

hoseconnectionstotheoutertub.

Lower Strut Washer

Locking Nut

4. Leanthecabinetforwardtoaccessthetwo

lockingnutsthatsecurethestrutstothe

bottom of the base frame assembly. Use

an 8mm or ½" socket. Remove the lock-

ingnutsandlowerstrutwashers.

Figure7-13

4. Releasethesmalllockingtabontopofthe

switchandrotatetheswitchtodisengage

theswitchfromthestrut.

5. Withthewasherstandingupright, rollthe

washerforwardandoffthestruts, which

mountintotherubberisolatorsinserted

intotherearoftheoutertub.

5. ToReinstall: Reversetheaforementioned

steps.

6. ToReinstall: Reversetheprevioussteps.

INERTIAL UNBALANCE SWITCH

The purpose of the switch is to monitor the

lateralhorizontalmovementoftheoutertub

duringspin(above500RPM), versusthever-

tical movement. When a severe amount of

motionisdetected, themachinecontrolwill

implementareductioninspeedorstartare-

distributionoftheclothesload. Thisisdone

by gradually stopping the motor. After the

motor stops, the tumbler will alternately

tumble,firstinonedirectionthenanother. Af-

terabrieftime, themachinewillagainwork

uptoafullspin. Shouldthemachinedetect

anotherunbalance, thecontrolwillimplement

anotherredistributionoftheload.

Strut Displacement Switch

1. Disconnectpowertotheunit.

2. Remove the rear access panel for imme-

diateaccessorremovethefrontpanel.

3. Removethewirestotheswitch.

7-8

16008373-01

SECTION 7. OUTER TUB & SPINNER ASSEMBLY

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REMOVAL

1. Disconnectpowertotheunit.

2. Remove the front panel and lift the top

cover (See Front Panel & Top Cover

Removal).

2. Remove the front panel and lift the top

cover (See Front Panel & Top Cover Re-

moval).

3. The switch is located on the upper right

handsideoftheoutertubassembly(Fig-

ure7-14).

3. The switch is located on the upper right

hand side of the outer tub assembly, di-

rectlybehindtherightupperfrontsuspen-

sionspring(Figure7-15).

4. Remove the two screws securing the

switchtotheoutertubassembly.

4. Remove the screw and flat washer secur-

ingtheswitchinplace.

5. Using a flathead screwdriver, pry the

switchbodyfromtheoutertubassembly.

Outer Tub

Figure7-14

Switch

TUB DISPLACEMENT SWITCH

Figure7-15

The displacement switch is located on the

righthandsideoftheoutertubassembly, be-

low the upper weight. The location of the

switchontheoutertubwillactivatetheswitch

whenever the outer tub assembly makes con-

tactwiththewallofthecabinet. Shouldcon-

tactwiththecabinetoccurbeforethemachine

reaches 500 rpm, the machine control is

alertedandwillreducespeedtoimplementa

redistributionprogram.

16008373-01

SECTION 7. OUTER TUB & SPINNER ASSEMBLY 7-9

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7-10

16008373-01

SECTION 7. OUTER TUB & SPINNER ASSEMBLY

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SECTION 8. MOTOR DRIVE SYSTEM

Warning - Always shut off

electrical power to the

unit before beginning any

service procedures.

The motor drive system tear-down procedure

covers all components related to the drive

system, such as the drive motor, drive belt,

motor control, machine control and acceler-

ometer switch.

Figure 8-1

DRIVE MOTOR

DRIVE BELT

The drive motor is hinged into the left bottom

area of the outer tub and secured to the outer

tub by the bolt on the belt adjustment wheel.

A slot in the mounting bracket of the outer

tub allows the motor to pivot and allows

adjustment of the drive belt tension.

The drive belt has six (6) ribs which mate

with the face of the motor pulley. The belt

encircles the motor pulley and the drive

pulley of the spinner.

REMOVAL

1. Disconnect power to the unit.

R E M O V A L

2. Roll the belt off the drive pulley and re-

move from the motor pulley.

1 . Disconnect power to the unit.

2. Remove the front panel, rear access panel

and the front weight (See Front Panel &

Rear Access Removal).

ADJUSTMENT

Check belt tension. If loose, remove the belt,

loosen the belt adjustment wheel bolt and

rotate the wheel one notch in a clockwise

rotation. Check belt tension again. The belt

should experience no more than 1" deflection

when depressed toward the inside

3. From the rear, locate the belt adjustment

wheel and note the adjustment number

aligned with the rib of the outer tub. This

will help later when the belt adjustment

wheel is placed back onto the outer tub

and the belt is remounted on the motor

and drive pulley. Remove the bolt secur-

ing the belt adjustment wheel

(Figure 8-1).

(Figure 8-2).

16008373-01

SECTION 8. MOTOR DRIVE SYSTEM

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16008373-01

SECTION 8. MOTOR DRIVE SYSYTEM

4. Lift the motor slightly to disengage the belt

from the motor pulley. Place motor on the

base frame.

Figure 8-3

Figure 8-2

5. From the front, remove the wire harnesses

from the back of the motor.

MACHINE CONTROL

The machine control is located in the control

console and is secured to the rear cover.

6. Grasp the motor and slide it carefully from

the pivot hang holes in the outer tub.

R E M O V A L

REPLACEMENT

1 . Disconnect power to the unit.

1 . Reverse the previous procedures to re-

mount the motor.

2. Remove the control console (See Control

Console Removal).

NOTE: Prior to hanging the motor, recon-

nect motor wire harnesses and ground wire.

3. Remove the wiring from the machine con-

trol, paying close attention to the wire har-

ness hookup to the control board.

2. Prior to hanging the motor on the outer

tub, check the positioning of the rubber

motor mounts.

4. Remove the two 5/16" nuts securing the

board to the rear console panel.

3. Check belt tension. If loose, loosen the belt

adjustment wheel bolt and rotate the

wheel one notch in a clockwise rotation.

Check belt tension again. The belt should

experience no more than a 1" deflection

when depressed to the inside.

5. Reverse the previous procedures to re-

mount the board.

8 - 2

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MOTOR

CONTROL

The motor control is located behind the front

panel in the lower right hand side of the

cabinet. The assembly comprises of the

circuit board, control cover, mounting plate

and motor wire harness.

REMOVAL

1 . Disconnect power to the unit.

Figure 8-4

2. Remove the front panel (See Front Panel

Removal).

3. Remove the shield/cover from the motor

control board by depressing the locking

tab found along the lower left side of the

motor control base plate.

4. Remove the wire harness leading to the

control console (Figure 8-4).

5. Remove the wire harness from the motor.

6. Remove two mounting screws in front of

the motor securing the assembly to the

base. A rear locating tab on the motor

control base engages with a slot in the

base frame.

7. To replace, reverse the previous steps.

16008373-01

SECTION 8. MOTOR DRIVE SYSTEM

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16008373-01

SECTION 8. MOTOR DRIVE SYSYTEM

8 - 4

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SECTION 9. ELECTRICAL SCHEMATICS & TIMER

INFORMATION

Prior to Series 17

16008373-01

SECTION 9.

ELECTRICAL SCHEMATICS

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16008373-01

SECTION 9.

ELECTRICAL SCHEMATICS

TIMER CHART - Prior to Series 17

9 - 2

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ELECTRICAL SCHEMATIC - Series 17

16008373-01

SECTION 9.

ELECTRICAL SCHEMATICS

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16008373-01

SECTION 9.

ELECTRICAL SCHEMATICS

TIMER CHART - Series 17

9 - 4

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ELECTRICAL SCHEMATIC - Series 18

16008373-01

SECTION 9.

ELECTRICAL SCHEMATICS

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16008373-01

SECTION 9.

ELECTRICAL SCHEMATICS

TIMER CHART - Series 18

9 - 6

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ELECTRICAL SCHEMATIC - Series 19

16008373-01

SECTION 9.

ELECTRICAL SCHEMATICS

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16008373-01

SECTION 9.

ELECTRICAL SCHEMATICS

NOTES:

9 - 8

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INTRODUCTION

Attached is supplement three (16008373-03) for service manual 16008373, which

replaces supplement two (16008373-02) This Maytag Washer Service Manual

supplement covers Models MAH4000 & MAH5500A We suggest you file this with your

16008373 Manual for reference

Models covered in this manual supplement:

MAH4000 MAH5500A

CONTENTS

SECTION 1ꢀ MAH4000/MAH5500A CONTROL FACIA ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ 1

SECTION 2ꢀ SPECIFICATIONS ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ 2

SECTION 3ꢀ BASIC MACHINE OPERATION ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ 3

SECTION 4ꢀ WASHER CONTROLS OVERVIEW ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ 3

SECTION 5ꢀ CYCLE REVIEW ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ 4

Stain Cycleꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ 4

Cycle Times ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ 6

SECTION 6ꢀ GENERAL COMPONENT - EXPLODED VIEW ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ 7

SECTION 7ꢀ ELECTRICAL INFORMATION ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ 8

SECTION 8ꢀ WATER CARRYING COMPONENTS ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ 9

WATER VALVEꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ 9

DISPENSER ASSEMBLYꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ 9

RECIRCULATION PUMP ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ 10

DETERGENT HOSE ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ 11

SECTION 9ꢀ WIRING INFORMATION ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ 14

For additional information on material covered in this manual, including safety issues,

contact:

Maytag Appliances Sales Company

240 Edwards Street, SꢀEꢀ

Cleveland, TN 37311

Phone: 423-472-3333

16010199 (16008373-03)

Revised 7/00

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(The following information is supplemental to the information found in the basic

manual part number 16008373")

SECTION 1ꢀ MAH4000/MAH5500A CONTROL FACIA

SECTION 2ꢀ SPECIFICATIONS

CAPACITY

3ꢀ1 Cubic Feet

120 Volts, 60 Hz; Requires 15 amp circuit breaker or fused electrical supplyꢀ

Power cord must be connected to a properly grounded and polarized outletꢀ

ELECTRICAL

Switched Reluctance Motor controlled by a microprocessor motor control boardꢀ

Motor Pulley Ratio (Motor to Spinner RPM) 14 to 1ꢀ

MOTOR

Motor Input: During Wash Tumble - 170 Watts

During Rinse Tumble - 195 Watts

POWER USAGE

Top Spin - 800 Watts

(Wattage readings taken with no clothes in spinꢀ)

Wash Tumble

Rinse Tumble

High Speed Spin

47 - 51 RPM

TUMBLER SPEED

WATER USAGE

800 RPM (+ 50 RPM based upon optimum spin

performance)

Water pressure should be 20 - 120 PꢀSꢀIꢀ (1ꢀ06-8ꢀ44 kg/cm) at inlet hose

connectionꢀ Total water usage is approximately 25 gallons, varies with clothes

loadꢀ Water fill in the spin basket with no clothes, measured near the rear seam

of the spin basket

WASH LEVEL 3-4 inches

RINSE LEVEL 4-5 inches

Four foot inlet hoses with inlet washers and attached to water valveꢀ

Drain hose attached to pump and will accommodate 36" drain stand pipeꢀ

HOSE LENGTHS

DIMENSIONS

Cabinet Dimensions: 27" (68ꢀ58cm) W x 271/2" (69ꢀ85cm) D x 36" (91ꢀ44cm)H

WEIGHT (Approxꢀ) Uncartoned 190 lbꢀ (86 kgꢀ) Approxꢀ

Crated 200 lbꢀ (91 kgꢀ) Approxꢀ

Bolt, Counter Weight

Bolt, Spin Pulley

Bolt, Belt Adjuster

Screw, Front Baffle

Screw, Rear Baffle

Clamp, Hoses

7 inꢀ lbsꢀ

(+ 3 inꢀ lbsꢀ)

(+ 10 inꢀ lbsꢀ)

(+ 3 inꢀ lbsꢀ)

(+3 inꢀ lbsꢀ)

30 inꢀ lbsꢀ

90 inꢀ lbsꢀ

25 inꢀ lbsꢀ

18ꢀ5 inꢀ lbsꢀ

15 + inꢀ lbsꢀ

18 inꢀ lbsꢀ

7 inꢀ lbsꢀ

SCREW & BOLT

TORQUES

Nuts, Spinner Support

Nuts, Suspension struts

(+ 3 inꢀ lbsꢀ)

16010199 (16008373-03)

Revised 7/00

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SECTION 3ꢀ BASIC MACHINE OPERATION

The model MAH4000 and MAH5500A are similar to the MAH3000 washer, with the exception

being the MAH4000 and MAH5500A have a recirculation pump in series between the outer

tub outlet and the drain pump When the water pressure switch becomes satisfied (Series 11

and later on the MAH4000 and all the MAH5500A), power is then applied to the recirculation

pump The recirculation pump draws water from the bottom of the outer tub and circulates the

water up through the detergent hose, then into the top of the outer tub By doing this, the

washer is able to provide a more even distribution of detergent throughout the wash load

SECTION 4ꢀ WASHER CONTROLS OVERVIEW

The software of the MAH4000 and MAH5500A models is slightly different than the software

used in the MAH3000 washer Fabric Selections on the control console were changed from

Cotton/Sturdy to Whites, Easy Care/Perm Press to Colors, Delicates remained the same

Series 10 of the MAH4000 washer allowed the recirculating pump to be directly controlled by

the timer (Figure 4-1)

Series 10

(MAH4000 only)

Figure 4-1

Series 11 & Later

(MAH4000 & MAH5500A)

Figure 4-2

16010199 (16008373-03)

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A new Stain Cycle and revised tumble patterns were introduced and will be described

in the following pages

At series 11 the timer was changed, wire harness revised and the schematic was

changed The timer cams were changed in the timer, the wire harness changed to pull

wires out of the timer connector and the pump is now in series with the pressure

switch, also an extra wire was jumpered across the pressure switch Now the recircu-

lating pump is controlled through the pressure switch (Figure 4-2)" This was done to

force the washer to fill with water prior to starting the recirculation pump

SECTION 5ꢀ CYCLE REVIEW

Figure 5-1

Cycles on the Fabrics switch now list the cycles according to how clothes are

sorted This simiplifies how to select the cycles in doing the wash A new

Stain Cycle was added to the Option Switch which adds cycle wash time, vari-

ous tumble patterns and an additional rinse with longer tumble times during the

rinse (See Figure 5-1)

16010199 (16008373-03)

Revised 7/00

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Cycle Times:

All Wash Time/Total Wash Cycle

Easy Care/

Non-Max

Extract

Cotton/Sturdy

Delicates

Hand Washables

Perm Press

Heavy Wash

Normal Wash

23ꢀ0/49ꢀ0

17ꢀ0/43ꢀ0

20ꢀ0/45ꢀ5

20/46ꢀ5

Not Applicable

14ꢀ0/39ꢀ5

8ꢀ0/33ꢀ5

14ꢀ0/40ꢀ5

Light/Quick

Wash

11ꢀ0/37ꢀ0

800/3ꢀ5

7ꢀ0/34ꢀ5

500/4ꢀ5

Not Applicable

Final Spin

(RPM/Min)

600/3ꢀ0

Heavy Wash

Normal Wash

23ꢀ0/46ꢀ0

17ꢀ0/40ꢀ0

20ꢀ0/41ꢀ5

14ꢀ0/35ꢀ5

20ꢀ0/42ꢀ0

14ꢀ0/36ꢀ0

20ꢀ0/43ꢀ0

14ꢀ0/37ꢀ0

Light/Quick

Wash

11ꢀ0/34ꢀ0

800/4ꢀ0

8ꢀ0/29ꢀ5

600/3ꢀ5

8ꢀ0/30ꢀ0

500/5ꢀ0

8ꢀ0/31ꢀ0

500/5ꢀ0

Final Spin

(RPM/Min)

Notes:

1 The main wash times listed include 2 minutes of bleach fill and tumble time

2 The total cycle times are approximate and will vary based on water fill times, due to

types of clothing loads and the time for the door lock system to retract at the end of

the cycle

3 The main wash time is affected significantly if the machine control detects an exces-

sive amount of suds via a loss of motor torque The washer will go into a suds

reduction routine, consisting of a series of additional rinse and partial drain cycles to

reduce the suds present (See Troubleshooting & Diagnosis - Clothes Wet at End

of Spin)

Tumble Pattern - Number of seconds tumbling/

Number of seconds of pause between tumblesꢀ

Easy Care/

Perm Press

Cotton/Sturdy

Delicates

Hand Washables

7/3

5/3

6/24

3/27

16010199 (16008373-03)

Revised 7/00

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Stain Cycle:

General overview of Stain Cycle:

1) Tumble in the “normal” tumble pattern until it has completed filling

plus 3 minutes

2) Tumble for an additional 15 minutes with a 6T/24P tumble pattern

3) Return to selected tumble pattern and proceed with remainder of the

wash time preselected

4) Bleach fill and first rinse fill temperature will be the same as the wash fill

temperature

5) Rinse times (including fills) are now 5-1/2 minutes, 4 minutes, 4

minutes and 4-1/2 minutes

6) The fourth rinse is forced, which would be warm if warm rinse selected

(Colors will not default to cold on the 4th rinse )

The following is an example of a Stain Cycle:

Whites, Warm/Cold, Stain Cycle selected on timer, Extra Rinse not selectedꢀ

Cycle

Function

Stain Cycle Option Switch

"Not selected"

Stain Cycle Option Switch

"Selected"

Fill Time

20 Minutes @ 7T/3P

(7T=7 second tumble, 3P=3 second

pause)

3 Minutes @ 7T/3P

15 Minutes @ 6T/24P

17 Minutes @ 7T/3P

Fill/Wash

Bleach/

Tumble

2 Minutes

1st Rinse

2nd Rinse

3rd Rinse

4th Rinse

2 Minutes Fill & Tumble

2-1/2 Minutes Fill & Tumble

5-1/2 Minutes Fill & Tumble

4 Minutes Fill & Tumble

4-1/2 Minutes Fill & Tumble

6-1/2 Minutes

Final Spin 6-1/2 Minutes

_________

74 Minutes

__________

46 Minutes

Total Run

Time:

Suds detection during stain cycle:

1 Torque baseline is set during the first 3 minutes of Wash cycle after the wa

filled

2 Suds detection is frozen during 15 minutes of the 6/24 tumble action during

Fill cycle

3 Suds detection begins when cycle resumes the initial selected tumble pattern

16010199 (16008373-03)

Revised 7/00

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SECTION 6ꢀ GENERAL COMPONENT - EXPLODED VIEW

Component Identification & Location:

16010199 (16008373-03)

Revised 7/00

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SECTION 7ꢀ ELECTRICAL INFORMATION

MACHINE

CONTROL

BOARD

MACHINE

CONTROL

BOARD

VOLTAGE-

APPROXꢀ

(When Activated)

FUNCTION

TIMER CONTACT

TERMINAL/WIRE

Colors

(Fabric Switch)

Line Relay NO

(GY 26)

P3/2 (PK 37)

P3/6 (OR 38)

P3/8 (BR 39)

24 VDC

Not Involved

Delicates

(Fabric Switch)

Line Relay NO

(GY 26)

Hand Washables

(Fabric Switch)

Line Relay NO

(GY 26)

P3/2 (PK 37)

P3/6 (OR 38)

P3/8 (BR 39)

0 VDC

0VDC

Whites

(Fabric Switch)

Line Relay NO

(GY 26)

Not Involved

Signal ON/OFF

(Options Switch)

Line Relay NO

(GY26)

24 VDC - ON

0 VDC - OFF

P2/1 (PU 21)

P7/8 (PK 19)

P3/* (BR39)

P2/3 YL 20)

Not Involved

12B (GY 22)

Not Involved

Extrac Rinse

(Options Switch)

P5 (WH 11)

120 VAC

24 VDC

Stain Cycle

(Options Switch)

Line Relay NO

(GY 26)

Max Extract

(Options Switch)

Line Relay NO

(GY26)

Push To Start

Switch

(When Pressed)

P1/3 (YL 28 or

RD 28)

P5 (WH 11)

120 VAC

Not Involved

Line Relay NO

(GY 26)

Unbalance Control

Door Lock - Spin

P2/4 (OR 40)

P3/7 (YL 36)

24 VDC

Not Involved

P3 (1)

Machine Control &

Motor Control

Power

Line Relay Com

(BK 27)

P5 (WH11)

120 VAC

Not Involved

120 VAC or

500-1000 Ohms

Hot Water Valve

Cold Water Valve

P5 (WH11)

P7/1 (OR7)

Not Involved

2T (BR 5)

120 VAC or

500-1000 Ohms

P7/2 (BU 9)

P7/4 (BR 14)

Not Involved

Door Lock Wax

Motor

120 VAC

Bleach Water

Valve

Softener Water

Valve

2B (YL 6)

Line Relay NO

(GY 26)

Delay Light

4T (OR 2)

16010199 (16008373-03)

Revised 7/00

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SECTION 8ꢀ WATER CARRYING COMPONENTS

)DEULF

6RIWQHU

Warning - Always shut off

electrical power to the unit

before beginning any ser-

vice repair proceduresꢀ

ꢀꢁ&2,/ꢁ:$7(5ꢁ9$/9(

%OHDFK

&ROG

+RW

WATER VALVE

'HWHUJHQW

:DVK

The water valve is accessible from the

front of the machine The flow rate of the

dispenser 3 gpm

Figure 8-1

6 Carefully lift the valve with the inlet

hoses attached and direct the inlet

hoses through the openings in the

valve mounting bracket

Removal

1ꢀ Discontinue power and water to the

machineꢀ

7 The hoses can be crimped or the

2 Remove the front panel and lift the top

water shut off at the faucets Place a

towel below the valve and remove the

cover

inlet hoses from the water valve

3 Remove the wire harness connections

to the water valve solenoids

8 To reinstall, reverse the aforemen-

tioned procedure

4 Loosen and remove the hose clamps

on the inlet hoses leading away from

the water valve

DISPENSER ASSEMBLY

5 Locate and loosen the valve mounting

The wax motor and linkage system de-

screw by turning the screw at least

signed for proper dispersing of the water

into the bleach and fabric softener dis-

pensing cups has been eliminated The

new system uses a 4 coil water valve with

designated inlet hoses leading to each

dispensing cup The 4 coil water valve

operates like a 2 coil water valve The

two water valve coils are individually

dedicated to dispensing water through

the bleach and fabric softener dispensing

cups When either of these valves is

open, part of the flow will be routed

through the dispenser cup A portion of

the flow will still be routed through the

detergent wash area

three full turns

NOTE: The mounting screw serves

as a locating pin to hold the valve in

position on the mounting bracket" By

partially removing the screw, the

water valve can now be slid to the

left and removed from the bracket

(Figure 8-1)"

16010199 (16008373-03)

Revised 7/00

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RECIRCULATION PUMP

DISPENSER

BOTTOM

DISPENSER

FLUME

DETERGENT

The Recirculation Pump is accessible

from the front or the rear of the machine

The pump is connected in series with the

outer tub pump hose and the drain hose

(See Figure 8-4)

WASH INLET

HOSE

FABRIC

SOFTENER

BLEACH

INLET HOSE

Figure 8-2

As a result of this revision, a new dis-

penser bottom, water valve and hoses

were introduced (See Figure 8-2)

OPERATION:

When Bleach or Fabric Softener is re-

quired to dispense, the dedicated sole-

noid on the water valve is activated the

same as the previously used wax motor

Water is directed to dedicated spouts on

the dispenser bottom (See Figure 8-3)

Figure 8-4

1 Disconnect power and water to the

machineꢀ

2 Remove the front panel

Inside the dispenser bottom, water is

directed into the designated channels

leading to the siphon cup assembly

3 Lay a towel under the tub to pump

hose and loosen the clamp on the

pump connection to the hose

FABRIC

SOFTENER

4 Loosen the clamp on the detergent

hose connected to the side of the

recirculation pump

BLEACH

5 Lift the recirculation pump at an angle

to disengage the locating tab of the

mounting bracket from the baseframe

(See Figure 8-5)

DISPENSER

BOTTOM

(TOP VIEW)

NOZZLE WAS

REMOVED

Figure 8-3

16010199 (16008373-03)

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DETERGENT HOSE

The detergent hose leads from the recir-

culation pump up the rear of the washer

cabinet and leads to the top of the outer

tub assembly The hose provides a path

for the water to recirculate from the lower

part of the outer tub assembly to the

enter on top of the outer tub assembly

Note: Small indicator marks are painted

on the hose to locate and properly posi-

tion the metal mounting clips onto the

hose"

Figure 8-5

DETERGENT HOSE

6 To remove the pump from the mount-

ing bracket, pull down on the mount-

ing tabs and slide the pump off the

INDICATOR

MARK

mounting bracket (See Figure 8-6)

RECIRCULATION PUMP

Figure 8-7

Removal

1 Disconnect power and water to the

washerꢀ

Figure 8-6

2 Remove the detergent hose from the

recirculation pump

NOTE: Indicator mark on hose for

reinstallation"

16010199 (16008373-03)

Revised 7/00

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3 Locate the rear mounting clip on t5h e The detergent hose then goes verti-

detergent hose in the access panel

opening and slide the clip off the

cabinet flange (See Figure 8-8)

cally to the upper right rear flange of

the cabinet and is retained by two

metal clips Indicators are on the hose

showing the proper positioning of the

clips on the hose

Note: When reinstalling clip to

cabinet ensure the clip is approxi-

mately 1 inch up from the inside

corner of the access opening to

prevent kinking of the hose"

NOTE: The upper left clip should be

positioned directly above the top air

dome hose retainer"

(See Figure 8-11 & 8-12)

Figure 8-10

Figure 8-8

4 Follow the detergent hose vertically up

to the air dome hose mounting bracket

The detergent hose is tucked behind

the air dome hose (See Figure 8-9)

Figure 8-11

6 The detergent hose turns 90 degrees

toward the front of the washer and

passes through the saddle horn on the

top of the outer tub Unsnap the hose

from the saddle horn

(See Figure 8-12)

Figure 8-9

16010199 (16008373-03)

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Figure 8-12

7 The saddle horn is secured to the top

of the outer tub with a screw

NOTE: The upper wire harness for

the unbalance circuit is snapped into

the saddle horn with the detergent

hose"

8 Loosen the clamp on the detergent

hose on the outer tub and remove the

hose

9 To reinstall, reverse the removal steps

taking note of the indicators on the

hose in reference to the mounting

clips, making sure the hose does not

kink above the recirculation pump

16010199 (16008373-03)

Revised 7/00

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SECTION 9ꢀ WIRING INFORMATION

Please refer to the technical schematic packed in the control console in the washer for

up to date wiring information for the product your are servicing The schematics on the

following pages are only a general reference at the time this manual was printed

16010199 (16008373-03)

Revised 7/00

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SERIES 10 - SCHEMATIC (MAH4000 only)

16010199 (16008373-03)

Revised 7/00

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SERIES 11 (MAH4000 and MAH5500)

16010199 (16008373-03)

Revised 7/00

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SERIES 10 - TIMER CHART (MAH4000)

16010199 (16008373-03)

Revised 7/00

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SERIES 11 - TIMER CHART (MAH4000 & MAH5500A)

16010199 (16008373-03)

Revised 7/00

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16008373-05

MAYTAG

New Century

Neptune Washer

Service Manual

Supplement

Attached is Supplement five for service manual 16008373ꢀ

This Maytag Washer Service Manual supplement covers Models MAH5500B and

MAH7500ꢀ The following information is supplemental to the information found in the

basic manual part number 16008373ꢀ Please refer to this manual for detailed service

informationꢀ

We suggest you file this with your 16008373 Manual for referenceꢀ

16010486

(16008373-05)

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INTRODUCTION

Attached is supplement five (16008373-05) for service manual 16008373, which in

addition to supplement three (16008373-03) This Maytag Washer Service Manual

supplement covers Models MAH5500B & MAH7500A We suggest you file this with

your 16008373 Manual for reference

Models covered in this manual supplement:

MAH5500B MAH7500A

CONTENTS

SECTION 1ꢀ GENERAL INFORMATION ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ 1-1

SECTION 2ꢀ WASHER CONTROLS OVERVIEWꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ 2-1

SECTION 3ꢀ DIAGNOSTIC/HELP CODE TABELS ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ 3-1

SECTION 4ꢀ ELECTRICAL COMPONENTS & TESTING ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ 4-1

SECTION 5ꢀ TEARDOWN & WIRING INFORMATION ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ 5-1

For additional information on material covered in this manual, including safety issues,

contact:

Maytag Appliances Sales Company

240 Edwards Street, SꢀEꢀ

Cleveland, TN 37311

Phone: 423-472-3333

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16010486 (16008373-05)

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SECTION 1ꢀ GENERAL INFORMATION

MAH5500B CONTROL FACIA

(LED Screen)

MAH7500 CONTROL FACIA

(LCD Screen)

SPECIFICATIONS

CAPACITY

3ꢀ1 Cubic Feet

120 Volts, 60 Hz; Requires 15 amp circuit breaker or fused electrical supplyꢀ

Power cord must be connected to a properly grounded and polarized outletꢀ

ELECTRICAL

Switched Reluctance Motor controlled by a microprocessor motor control

boardꢀ Motor Pulley Ratio (Motor to Spinner RPM) 14 to 1 (MAH5500B) 14ꢀ1 to

1 (MAH7500A)

MOTOR

Motor Input: During Wash Tumble - 170 Watts

During Wash Tumble w/heater - 1300Watts

During Rinse Tumble - 195 Watts

POWER USAGE

Top Spin - 800 Watts

(Wattage readings taken with no clothes in spinꢀ)

Wash Tumble

Rinse Tumble

High Speed Spin

47 - 55 RPM

800 RPM (+ 50 RPM based upon optimum spin

performance) LED Washer (MAH5500B)

1000 RPM No tuning of system at 1000 rpmꢀ

LCD Washer (MAH7500A)

TUMBLER SPEED

WATER USAGE

Water pressure should be 20 - 120 PꢀSꢀIꢀ (1ꢀ06-8ꢀ44 kg/cm) at inlet hose

connectionꢀ Total water usage is approximately 25 gallons, varies with clothes

loadꢀ Water fill in the spin basket with no clothes, measured near the rear seam

of the spin basket

WASH LEVEL 2-3 inches

RINSE LEVEL 3-5 inches

Four foot inlet hoses with inlet washers and attached to water valveꢀ

Drain hose attached to pump and will accommodate 36" drain stand pipeꢀ

HOSE LENGTHS

DIMENSIONS

Cabinet Dimensions: 27" (68ꢀ58cm) W x 271/2" (69ꢀ85cm) D x 36" (91ꢀ44cm)H

WEIGHT (Approxꢀ) Uncartoned 177 lbꢀ (80kgꢀ) Approxꢀ

Crated 187lbꢀ (85kgꢀ) Approxꢀ

Bolt, Counter Weight

Bolt, Spin Pulley

Bolt, Belt Adjuster

Screw, Front Baffle

Screw, Rear Baffle

Clamp, Hoses

7 ftꢀ lbsꢀ

(+ 3 ftꢀ lbsꢀ)

(+ 2 ftꢀ lbsꢀ)

(+ 3 inꢀ lbsꢀ)

(+3 inꢀ lbsꢀ)

38 ftꢀlbsꢀ

22 ftꢀ lbsꢀ

25 inꢀ lbsꢀ

18ꢀ5 inꢀ lbsꢀ

15 + inꢀ lbsꢀ

18 ftꢀ lbsꢀ

7 ftꢀ lbsꢀ

SCREW & BOLT

TORQUES

Nuts, Spinner Support

Nuts, Suspension struts

(+ 3 ftꢀ lbsꢀ)

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BASIC MACHINE OPERATION

Models MAH5500B and MAH7500 are similar to the MAH4000 washer, with the exception

being they do not have recirculation of the wash water! A special sump cap is placed directly

above the sump area which catches the detergent and allows for a better mixing of the

detergent and the wash water! The door lock mechanism was updated from a wax motor

system to a solenoid, resulting in faster locking and unlocking of the door! The water level

pressure switch was relocated from the console to the top of the pump, thus eliminating the

airdome hose! The motor drive system was changed to a sensorless system, thus eliminating

the tach sensor in the motor in the harness leading to the motor control board! Heater with

thermistor was added to the sump area of the tub to heat the wash water on the MAH7500A

model!

General Flow Of A Complete Wash Cycle

There are several user selections which modify the main wash! Fabric selection impacts tumble

pattern! Wash/rinse temperature selection determines water fill temperature! Soil level and

quick wash selections determine wash time! The Stain cycle and Presoak options add addi-

tional time with a special tumble pattern to the main wash! The stain cycle option also adds

rinse time to non-heavy cycles and some warmer rinses! The Quick cycle reduces wash time

and only has two rinses! For this cycle, less detergent should be used!

1) The wash cycle is selected and started by user by pressing Start/Pause button

2) The door lock mechanism is verified by locking it and unlocking it! The door is left unlocked!

3) The drain pump will turn on (energized) for a short period of time!

4) The water fill will begin after a delay from the time the pump is turned off! The temperature

of the water entering the tub depends on the user selections!

5) After 30 seconds the door will be locked and the machine will tumble at the Handwash wash

tumble pattern (less aggressive) until the machine is at wash level! The exception would be

if the Cotton/Sturdy is selected or Quick cycle and the washer would have a 7/3 tumble

pattern! Note: No permanent locking, tumbling, or spinning shall be done for 30 seconds

after any cycle is started or re-started! Filling and draining will be allowed in this initial

period! Once filled, the tumble pattern and the total wash time depends on the user selec-

tions! A Wash Tumble Flush occurs shortly after the water reaches the wash fill level! A

Wash Tumble Flush will have special tumbling speed to ensure the proper mixing of the

detergent!

7) Shortly before the end of the wash cycle bleach will be dispensed!

8) The washer will then drain and spin!

9) The washer will fill tumble, drain, and spin repeatedly to rinse the clothes! The number of

rinses and spin speeds will be dependent on user selections! Toward the end of the wash

and rinse spin, the cold water valve will be turned on for 6 seconds! During the final rinse the

machine will perform a tumble flush to clean the machine!

10) A final drain and high speed spin will be performed to extract the water from the clothes!

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CYCLE SEQUENCES

Basic Tumble Patterns:

Wash Time Tumble:

Fabric Selections Basic Tumbling

Pattern and Speed

Wash Selections

Tumbling Time

32 minutes

wash tumble

2 minute bleach

fillꢀ

a) Cotton/Sturdy

b) Wrinkle Free

c) Delicates

7/3 at 47 rpm for

5/3 at 51 rpm

6/24 at 51 rpm

3/27 at 51 rpm

a) Extra Heavy

(LCD Model Only)

27 minutes

wash tumble

2 minute bleach

fillꢀ

b) Heavy

c) Normal

d) Light

d) Handwash

e) Fill for all except 3/27 at 51 rpm

Cotton/Sturdy and

Quick Wash

14 minutes

wash tumble

2 minute bleach

fillꢀ

f) Quick Wash

(regardless of all

fabric selections)

7/3 at 51 rpm

8 minutes wash

tumble

2 minute bleach

fillꢀ

Note: “7/3” means 7 seconds on, 3 seconds off,

reverse direction and repeatꢀ

3 minutes wash

tumble

2 minute bleach

fillꢀ

e) Quick

Number of Rinses:

Extra Quick Rinse Spin Extra-- Stain Noꢀ of

Rinse Tumble Times:

Heavy,

normal,

or light

Rinse

Rinses

Rinse

Tumbling Time

Selections

1st Rinse - 3 minutes

2nd Rinse - 3 minutes

Light, no stain Extra Rinse - 3 minutes

3rd Rinse - 3 minutes*

a) Normal or

b) Stain, Extra

Heavy or

Heavy

1st Rinse - 4ꢀ5 minutes

2nd Rinse - 4ꢀ5 minutes

Extra Rinse - 4ꢀ5 minutes

3rd Rinse - 4ꢀ5 minutes*

1-4

1st Rinse - 2 minutes

Extra Rinse - 2 minutes

2nd Rinse - 2 minutes*

c) Quick

d) Rinse

All Rinses - 3 minutes

MAH5500B

^*Note: The final rinse time does not include the

Tumble Flush timeꢀ Tumble Flush time will add a

minimum of 30 seconds to a maximum of 60

additional seconds to the final rinse timeꢀ (See

definition of Tumble Flush)

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MAH7500

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The water temperature entering the washer during rinse is temperedꢀ The following

table shows the temperature based on the user selectionsꢀ

INPUT WATER TEMPERATURE

Extra Heavy, Quick,

heavy, normal, or light

Option Selected

Selected

Temperature

Rinse Stain

Cycle

Rinse water

temperature

H/C, W/C, and

C/C

Non-tempered coldꢀ

W/W

80°F for the final rinse

onlyꢀ Non-tempered cold

for all other rinsesꢀ

H/C, W/C, and

C/C

Non-tempered cold

W/W

All rinses 80 °F

H/C, W/C, and

The first rinse is the

same as the wash

temperatureꢀ The rest of

the rinses are the same

as if stain cycle was not

selectedꢀ

(heavy, normal, and light C/C AND W/W

only, quick is not allowed

with stain)

ON/OFF SEQUENCE OF PUMP DURING SPIN CYCLE

Spin Speed

Drain Pump

a) <540 rpm

On continuous

b) <100 rpm when in redistributionꢀ Off

c) >=540 rpm and during the first

minute

15 second on and 15 second off

duty cycleꢀ

d) >=540 rpm and 30 seconds after 15 second on and 45 seconds off

the machine has reached the target

speedꢀ

duty cycleꢀ

e) Coast down during final spin

Off until machine reaches 300 RPM

and then on until the machine

reaches 0 RPMꢀ

f) Coast down during all other spins On continuous until next step in the

cycle

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SECTION 2ꢀ WASHER CONTROLS OVERVIEW

The software for the MAH5500B and the MAH7500 is different than the MAH4000

washerꢀ The new controls operate via a membrane pad on the MAH5500 and a touch

screen/membrane pad on the MAH7500 washerꢀ

Features of MAH5500B (LED Washer):

• A membrane switch (keyboard) with an

embedded LED displayꢀ

Features of MAH7500 (LCD Washer):

• A membrane switch (keyboard) with a

LCD display and touch screenꢀ

• The user can select a delay startꢀ

• The wash/rinse temperatures and wash

cycles are remembered and based on

the previous fabric type selectedꢀ

• The user can select another wash cycle

during the operation and the control will

determine the completion of the cycleꢀ

• The control panel displays the estimated

time remaining in the cycle

• The control panel stores codes to aid the

service person in diagnosticsꢀ

• The control panel detects hose reversal

and changes the fills as necessaryꢀ

• The user can select a delay startꢀ

• The wash/rinse temperatures and wash

cycles are remembered and based on

the previous fabrics type selectedꢀ

• The control panel drives a heater located

in the sumpꢀ

• The control displays the estimated time

remaining in the cycleꢀ

• The control panel detects hose reversal

and changes the fills as necessaryꢀ

• The control panel stores codes to aid the

service person in diagnosticsꢀ

BASIC CONTROL BOARD PHILOSOPHY FOR BOTH WASHERS:

Figure 1

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machine at night or some other time to

better suit the needs of the householdꢀ

USER INTERFACE

SELECTIONS: (LED Washer)

The consumer can select the time delay

from 1 hour to 9 hours in increments of 1

hourꢀ The user shall press the delay button

for each 1 hour incrementꢀ Holding down

the delay wash key will advance through

the one hour increments to off and start

over againꢀ

The user can select the setting of several

features while in the User Interface Active

Mode or the Main Wash Cycleꢀ The user

sets the features by pressing a key on the

keypad and the machine goes into the set

modeꢀ If the machine is in the main wash

cycle, additional criteria may be applied

prior to changing the featureꢀ The modes

to set a feature are:

The delay time (in hours) shall be shown

in left digit and an ‘H’ (for hours) shall be

shown in the right digit of the displayꢀ

• Fabric Mode

• Temperature Mode

• Cycles Mode

• Delay Mode

• Signal Mode

• Options Mode

If delay wash has been selected, but Start/

Pause has not been pressed to initiate it,

then the Start/Pause LED will flash off and

on to indicate that it must be pressedꢀ

The Start/Pause key must be pressed to

initiate a delay wash cycleꢀ Once it has

been pressed, the Start/Pause LED will

stay on constant and the time will begin to

count down and the display will indicate

hours of delay remainingꢀ When one hour

of the delay is reached, the time will be

shown in minutes in the two digits of the

displayꢀ

FABRIC MODE

When a Fabrics key is pressed, the last

cycle that was not a Quick, Rinse, or Spin

cycle, will be recalledꢀ Each Fabrics key

(Cotton/Sturdy, Wrinkle Free, Delicates,

Handwash, ) remembers the wash/rinse

temperature settings, max extract option,

extra rinse option, and wash settingsꢀ

Note: If a regular cycle has been

running for more than five seconds, the

delay wash key will be locked outꢀ

TEMPERATURE MODE

Four discrete wash/rinse temperature

selections are provided, each with an

associated LEDꢀ Up and down arrow keys

are used to make the wash/rinse

selectionꢀ Holding down one of these

keys will advance at a rate of one level per

half secondꢀ Wash/rinse selection will not

wrap aroundꢀ

SIGNAL MODE

The volume level of the end of cycle

signal is adjustableꢀ The sound ranges

from “off” to “3” in increments of 1ꢀ The

user will be able to select the plus (+) to

increase the volume levelꢀ The user will

be able to select the minus (-) to decrease

the volume levelꢀ When the user first

presses either of these keys, the current

end of cycle signal will be demonstratedꢀ

CYCLES MODE

When a wash key is selected (heavy,

normal, light, quick, rinse, or spin), the

LED shall be lit and remain lit until another

wash cycle is selectedꢀ The wash LEDs

do not change during the wash cycleꢀ

Subsequent presses of either the plus or

minus button within 5 seconds of the

previous key press will increase or

decrease one levelꢀ The new end of cycle

shall soundꢀ

DELAY MODE

The delay start option is primarily used

when a person wants to run the washing

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OPTIONS MODE

Changing Selections:

When the extra rinse key is selected, an

extra rinse is added for the wash cyclesꢀ

(Page 1-3 Extra Rinse Table)

Fabric, temperature, and options

selections may be changed at any timeꢀ

The current cycle step will be suspended

and the appropriate cycle step will be

restarted with the new selectionsꢀ The

machine will not stop, but rather the

changes will be dynamicꢀ

When max extract speed key is selected,

the max extract profile will be used for

spin cycle based on the fabric selectionꢀ

When the stain cycle key is selected, the

water input temperature, the wash time,

the tumbling pattern, speed, and amount

of rinses may be modifiedꢀ

The main Wash Keys may be changed at

any timeꢀ The cycle time remaining is

recalculated and displayedꢀ The

remaining time is calculated by applying

the actual time in the new cycleꢀ If the

user had originally selected Heavy wash

and 3 minutes has elapsed and the user

then selects Normal wash, the time

remaining will be 12 minutesꢀ (eꢀgꢀ 15

minutes Normal wash minus 3 actual

minutes = 12 minutes)ꢀ If the user had

originally selected Quick wash, 1 minute

had elapsed, and then the user selects

Heavy wash, the new remaining time will

be 19 minutes (20 minutes heavy wash

minus 1 minute actual time)ꢀ

When the presoak key is selected, a

presoak is added before the main wash

cycleꢀ

DISPLAY CHARACTERISTICS

Door Locked LED:

When the door is finally locked, the door

locked LED is litꢀ When the door is finally

unlocked, the door locked LED is not litꢀ

Two Digit Display:

The display shows the estimated time

remaining in the total cycle in minutesꢀ

This time will count down during the total

time cycleꢀ

The main Wash key may not be changed if

there is less than 2 minutes time

remaining in the wash cycle (Bleach Fill)ꢀ

Although the button can be depressed,

the LED status will change but the time

remaining or wash cycle will not changeꢀ

If the selected Wash cycle button is

pushed, the estimated time remaining in

that wash cycle shall be displayed for 5

seconds and the associated Wash level

LED will flashꢀ After 5 seconds, the

estimated time remaining for the total

cycle will be displayed and the wash level

LED will return to being on constantꢀ

USER INTERFACE SELECTIONS:

(LCD Washer)

All selections described under the LED

washer section are familiar except in the

Delay modeꢀ In this mode, time is

increased in 15 minute increments up to

12 hoursꢀ

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INPUT MODIFICATIONS DEFINED

PRESSURE SWITCH INPUT

The pressure switch is a two level pressure switchꢀ (Figure 4-2) The low level contacts

provide a path for a 24 VDC sensing circuit, the high level contacts provide an electrical

path for 110 VAC to the water valve relays on the boardꢀ Another sensor on the board

monitors the high level circuit to determine when the high level is reached and the

circuit is openedꢀ Thus, shutting off the water valve relaysꢀ

During wash fill, the low level of the pressure switch is sensed with 24 VDC and provides

an indication to the control board the water level has satisfied the low levelꢀ Once

satisfied, the 24 VDC circuit is openedꢀ The board then opens the water valve relays and

shuts off the water valvesꢀ

During rinse fill, the high level provides an indication to the machine control as to

whether the high water level has been reachedꢀ When the water level switch is satisfied,

the pressure switch circuit is opened and power for the water valves is no longer passed

through the machine controlꢀ

Figure 2

TEMPERATURE SENSOR INPUT

DOOR LOCK SWITCH INPUT

A thermistor is located in the water valve

to monitor the blended incoming water

temperatureꢀ The machine control uses

this input signal to regulate the water

temperature with the warm or cold wash

and warm rinse temperature selections

(See Water Valve Outputs)ꢀ

When input is present, this is indication

the washer door is lockedꢀ The machine

controller will not command the spinner

to tumble or spin when the door lock

input is not presentꢀ

If the door is opened during a cycle,

the control will pause the cycle on the

MAH5500Bꢀ

On the MAH7500 model, another

thermistor is located on the heater

assemblyꢀ The machine control board

uses this input signal to maintain the

water temperature in the sump area of

the outer tub, by cycling the heater on/

offꢀ

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START/PAUSE INPUT

OUTPUT MODIFICATIONS

DEFINED

The start/pause input is selected on the

membrane switch for both washersꢀ If

this input is initially selected the machine

control will begin the wash cycle

sequence as defined by the user input

selectionsꢀ If this input is selected when a

cycle is in progress, the machine control

will pause the cycle and unlock the door

when it is safe to do soꢀ

DOOR LOCK/UNLOCK

SOLENOID OUTPUT

The Door Lock/Unlock Solenoid Output

signal is a 60 millisecond pulse sent to a

solenoid in the door lock assemblyꢀ The

solenoid is attached to a lever which

moves a slider in the mechanism to lock

the door after it has been closed and the

cycle startedꢀ The solenoid has two coils,

one for locking and one for unlocking

when a pulse is directed to specific

terminals on the solenoidꢀ Power is not

continuously applied to the solenoid,

because this would damage the solenoidꢀ

(Note: Machine control board is

powered up all the timeꢀ There no

longer is a line relay used, as opposed to

the MAH3000, 4000 and 5500A modelsꢀ)

TACH INPUT

The tach input is a feedback signal from

the motor controlꢀ It provides eight

pulses per revolution of the switched

reluctance motorꢀ The motor runs at 14

times the speed of the spinner (14:1 belt

ratio)ꢀ The tach input is used for

monitoring speed and out-of-balance

detection (See Tachometer Circuit

Diagnostics)ꢀ

END-OF-CYCLE SIGNAL OUTPUT

The End-Of-Cycle Signal Output is an

internal signal on the machine control

between the microprocessor and

annunciatorꢀ The end-of-cycle signal

sounds when a wash cycle is finishedꢀ

The end-of-cycle signal sounds as four

pulses on the MAH5500B and 3 pulses on

the MAH7500 in a 0ꢀ5 second intervalsꢀ If

the door is opened right at the end of the

cycle or during the end of cycle beeps,

then the signal will stop on the MAH5500B

onlyꢀ If the start/pause key is pressed

near the end of the cycle, the end of cycle

signal will not occur unless the cycle is

restarted and allowed to finishꢀ If the Off

key is pressed, the end of cycle signal will

not occurꢀ The end of cycle signal will

occur when the door is unlocked and

ready to open on the MAH5500Bꢀ On the

MAH7500, the signal sounds then the

door is unlockedꢀ

If the machine control commands a motor

speed and direction but does not sense a

tach input signal within 2 or 3 seconds, it

will assign a HELP code number and

perform 10 retriesꢀ If unsuccessful, this

generally indicates a locked rotor or a

malfunction in the motor controlꢀ

If the machine control commands a coast

down from final spin speed but is still

receiving a tach input signal after two

minutes, it will log appropriate service

codesꢀ

HEATER OUTPUT (LCD Washer only)

The machine control board turns the

heater on to heat the wash water during

the main wash until the temperature

reaches the targeted main wash

temperatureꢀ The heater is turned back

on at any point the temperature falls 5º F

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below the main wash target temperatureꢀ

The heater monitors the water

temperature through the thermistor in the

heater assemblyꢀ Selecting the energy

saver, will turn off the heater and will not

affect tumble patternsꢀ

VDC REFERENCE VOLTAGE OUTPUT

The VDC Outputs are a reference voltage

for many of the signal outputsꢀ On the

machine control, the VDC outputs are 24

VDC referenced from P2(3) to the

individual outputsꢀ

Main Wash Target Temperatures

WATER VALVE OUTPUTS

The machine control determines whether

the hot or cold Water Valve Outputs

should be energized during the wash

cycle based upon the user selectionsꢀ

When water fill is required, the machine

control board will activate relays on the

board, supplying power to the water

valvesꢀ

The heater will not be turned on if the

following conditions exist:

1ꢀ Low level of the water pressure switch

is not satisfiedꢀ

2ꢀ The door is openꢀ

3ꢀ During the Bleach fillꢀ

4ꢀ Energy Saver onꢀ

User

Selections

Input water

tempered

Maximum

heater on

time

The machine control gates the power to

the hot and cold Water Valve Outputsꢀ

When the pressure switch senses that the

full level is reached, the circuit opens and

the machine control de-energizes the

Water Valve Outputsꢀ

Cold Wash -

no heater

Cold water

Tempered

wash

N/A

Cold Wash

with stain

cycle option & necessaryꢀ

heaterꢀ

65°F, Will heat

water to 65°F if wash time

Main

The machine control will monitor the

thermistor resistance and fill time to

achieve proper wash temperaturesꢀ

Warm Wash - Warm water

N/A

During a warm wash the cold may be

cycled off periodically to achieve the

desired water temperatureꢀ

no heater

Tempered

warm

Warm Wash

with stain

cycle option

and heaterꢀ

105°F, will heat Main

to 105°F if

necessary

wash time

On a cold wash the hot valve may be

cycled on and offꢀ

CYCLE SEQUENCE DEFINITIONS

Hot Wash - no Hot water

heater

N/A

IDLE/PAUSE MODE (LED Model)

After pressing the Off key, the entire

washing machine will shut down after

unlocking the door and will be in the Idle

Modeꢀ In the idle mode all the outputs are

de-energized, all the LEDs and display are

offꢀ

Hot Wash with Hot water, then Main

stain cycle and heat to 130°F if wash time

heaterꢀ

necessary

DOOR LOCKED LIGHT OUTPUT

The Door Locked Light Output signal

powers a LED on the membrane pad

switch of the LED washerꢀ This output is

energized when the washer door is

lockedꢀ

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If the Start/Pause key is pressed during

the wash cycle the washer shall stop all

the functions of the washer, placing the

washer in the Idle Modeꢀ The Start/Pause

LED will flash indicating the pause modeꢀ

The current place in the cycle will be

savedꢀ

high speed (above 100 rpm) spinꢀ When

the washer reaches 85 rpm, the machine

control monitors the Tach Input to

determine if the speed varies through one

revolution of the spinner basketꢀ If it

senses a high enough variation in speed

(suggesting an out-of-balance condition in

the clothing load), it will drop the spinner

speed to 0 rpm and force a short reverse

tumble to redistribute the clothing load

before resuming the spinꢀ If any of the

out-of-balance switches trip and open the

out-of-balance input circuit at a speed

below 500 rpm, the machine control will

also drop the speed to 0 rpm and force

the reverse tumble to redistribute the

clothing load before resuming the spinꢀ

If the Start/Pause key is pressed the door

will not be unlocked until the spin speed

is 0 rpmꢀ

If the Start/Pause key is pressed while

flashing (in pause mode), the machine

shall return to the start of the cycle step

when paused and the time displayed be

recalculated to the start of the cycle stepꢀ

The Start/Pause LED will stay on

whenever the machine is running in a

cycleꢀ Note: The door must be closed

prior to resuming the cycle9

SUDS DETECTION

The suds detection feature tries to

eliminate excessive suds during the main

wash or rinse cyclesꢀ Suds detection is

disabled during a stain cycle tumble

patternꢀ

BLEACH DISPENSE

The Bleach Fill occurs 2 minutes prior to

the end of the wash portion of the cycleꢀ A

bleach fill consists of turning the bleach

water valve and the appropriate fill water

valve(s) on until the water reaches high

water level or for 24 seconds, whichever

comes firstꢀ This is to ensure the bleach is

used completely during this washꢀ The

fill temperature during the Bleach fill shall

be based on the user selectionsꢀ If stain

cycle is selected then bleach fill and final

rinse are based on user selectionsꢀ If stain

cycle is not used, then only the final rinse

is affectedꢀ

If suds are detected, the estimated time

left on the wash cycle will be modified to

account for 4 additional rinsesꢀ

The washer will try twice in early spins

and 21 times when in the final spinꢀ

LCD Washer: If four out of seven cycles

have suds detected, “Too many Suds

detected” should be displayed on the

screenꢀ

LED Washer: If suds are still detected, the

“rinse” LED shall blink, 3 seconds on, 3 sec-

onds off and "sd" will be displayedꢀ

REDISTRIBUTION

As the machine is accelerating into spin, if

it detects that the clothes load is

unbalanced and would cause excessive

vibration, it will decelerate and tumble the

clothes in an attempt to redistribute them

in a more uniform manner so that

vibration is reducedꢀ

TUMBLE FLUSH (Two types of flush)

Wash tumble is a higher tumble speed

than normal while the machine is filled

with waterꢀ The purpose of this function is

to clean the machineꢀ Rinse tumble flush

is performed during the final rinse to

reduce the chance of suds creationꢀ

The machine control commands a

distribution profile speed ramp from 0

rpm to 85 rpm at the beginning of each

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2ꢀ A 60 milliseconcd 120 VAC impulse

from the machine control board to the

lock solenoid extends the push rod of

the solenoid and moves the lock lever

to the right only to lock the doorꢀ The

lock lever in turn is engaged with the

slider and slides the slider toward the

door lock mechanism and inhibits the

door lock mechanism from releasing

the door lock hoop of the doorꢀ

MISCELLANEOUS

DOOR LOCK PHILOSOPHY

The door lock mechanism is checked

by the machine control board for

proper operationꢀ This is done in the

following mannerꢀ

1ꢀ The door will be lockedꢀ If the door

does not lock on the first try, a help

code 47 is logged into the control

memoryꢀ The display will show the

door has not lockedꢀ

5ꢀ The slider will actuate the door lock/

unlock microswitch in the locked

position and the washer will begin the

wash cycleꢀ

2ꢀ If the door lock switch check shows

that the door is locked, then the door

will be unlocked and the cycle will

continue unless the door fails to

unlockꢀ If the door fails to unlock, the

cycle will be paused until the door is

able to unlock for 30 seconds and lock

againꢀ

6ꢀ When the wash cycle is finished an

impulse from the machine control

board to the unlocking solenoid

unlocks the door by pulling the slider

away from the door latching

mechanism and the lock/unlock

microswitchꢀ

DOOR LOCK OPERATION

7ꢀ The consumer can now open the doorꢀ

1ꢀ By closing the door, the door lock

hoop rotates the catch cam and the

door actuator is depressed actuating

the door open/closed microswitchꢀ

8ꢀ By opening the door, the open/closed

microswitch is openꢀ

Door Lock

Spring

Rotating

Emergency

Cord

Lock/Unlock

Solenoid

Cam

Door Open/

Door

Cam

Support

Closed

Mechanical

Opener

Switch

Solenoid

Push-Rod

Locking

Lamp Socket

& Lamp

Lever

Door Lock/

Unlock

Switch

Door Actuator

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POWER LOSS/FAILURE

MAH5500B:

Power-up after a power-loss during a main

wash cycleꢀ The machine cycle will re-

sume at the appropriate cycle step after

the Start/Pause key has been pressedꢀ The

control recovers the saved information on

power-up after a power lossꢀ The recov-

ery will be to the appropriate step in the

cycle and within 3 minutes of the cycle

step where the power loss occurredꢀ The

LCD display will be reset to the appropri-

ate time left after the Start/Pause key has

been pressed and not indicate a power

failure at that pointꢀ The main wash cycle

will resume immediately after the Start/

Pause key has been pressedꢀ

Information Saved:

Cause:

The beginning of the Last Power-loss

cycle step performedꢀ

Current User Interface

selections

Power-loss

Diagnostic codes, the total When occurred

number of the diagnostics

since diagnostic number

has been clearedꢀ

The number of cycles run End of a

completed

wash cycleꢀ

When a power loss occurs during the final

spin of a main wash cycle, the cycle will

end, on the MAH5500Bꢀ The MAH7500A

will finish the spin cycleꢀ

MAH7500A:

Continuously monitors and saves infor-

mation to memory every minute or as

cycle selection changeꢀ

Power-up after a power-loss during service

mode, continuous mode, or advertising

mode will cancel these modesꢀ

SPECIAL FEATURES

These modes will not resume after the

power-up until the user selections are

pressed againꢀ

The LCD and LED washers come with

several new features not available with the

earlier versions of the Neptune washersꢀ

By pressing a combination of keys, the

washer can be placed into an Advertising

Mode or into a Service Mode for the

service technicianꢀ

If a power outage occurs during a cycle the

washer will come back up in the paused

stateꢀ When paused (either by a power

outage or by the user), the washer will

remember where it wasꢀ The machine will

not automatically time-out and cancel a

cycle while pausedꢀ The display will re-

main on for 10 minutes after it is paused

with no activityꢀ After 10 minutes of no

activity, the display will turn off, but the

machine will remember where it was and

the display will be turned back on with any

user activityꢀ

ADVERTISING MODE

This mode will continuously display the

LEDs on the keyboard or illuminate the

LCD touch screenꢀ

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LED Washer

press and hold both the back key and the

favorites key for 3 secondsꢀ

Pressing the heavy soil and cotton/

sturdy keys for 3 seconds shall start the

washer in the Advertising modeꢀ No

functions will be run except illuminating

the LEDsꢀ

After 5 minutes of inactivity in the interac-

tive mode, the control will time out and

return to Advertising Mode and the adver-

tising sequence will begin againꢀ Any

settings or changes that the user has

made while in the interactive mode will

not be rememberedꢀ

SERVICE MODE

The service mode provides service person-

nel the ability to verify the operation of the

washing machineꢀ

The Advertising mode lights the LEDs in a

row and proceed in row orderꢀ The seg-

ments on the display are turned on in

unisonꢀ

The service mode can be entered at any

timeꢀ While in the service mode, the

servicer can start special service tests such

as a service cycle, user interface check,

quick spin, and control system diagnose

mode or advance the washer to the next

step in the wash cycleꢀ (See Service Mode

Table) The information will be displayed

and a variety of other information about the

machine can be accessed via the Help and

Diagnostic codesꢀ

LCD Washer

This mode will continuously display the

touch screen on the keyboardꢀ

Pressing the favorites and back keys for 3

seconds shall start the washer in the

Advertising modeꢀ

To aid the service technician, special

software was incorporated into the con-

trol boards of the MAH5500B & MAH7500

washersꢀ The software is used to monitor

several functions of the washer during

operation and identify any abnormalities

as they ariseꢀ These abnormalities can be

monitored in the Service Mode and the

board will list previously identified fail-

ures as either a Help or a Diagnostic codeꢀ

While in advertising mode, the display will

cycle through several screensꢀ If the

touch screen or any key (except off) is

pressed, the advertising sequence will be

temporarily interrupted and the control

will go to the Interactive Stateꢀ

The Help codes are generally logged

when the severity level of the abnormality

is not sufficient enough to shut down the

washer or require serviceꢀ

When this occurs, the user is able to

navigate through the control as normal

(including setting favorites, setting prefer-

ences, etcꢀ), but the machine will not be

allowed to run a cycleꢀ The only methods

of exiting the advertising mode are to

remove power from the machine or to

The Diagnostic codes are generally

logged dentified when the severity level

of the abnormality detected is higher and

service may be requiredꢀ

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Membrane Pad Check

NOTE: Due to the various differences

in the two washer control systems, the

following pages will focus first on the

LED washer then the LCD washerꢀ

While in service mode, pressing the

wrinkle free key will start a membrane

pad switch checkꢀ

The Help and Diagnostic code lists are

stored in separate permanent memories

with a maximum of nine codes per listꢀ

LED WASHER:

The membrane check involves turning all

the embedded LED on the membrane

pad off except for the wrinkle free keyꢀ All

the LED’s can be toggled by pressing the

key associated with the LEDꢀ

Accessing Service Mode:

Pressing down the delicates and heavy soil

keys for 3 seconds places the machine in

the service modeꢀ

At any point, if there are 5 seconds of

inactivity, then this test will exit without

any displayꢀ

SPECIAL TESTS

The following table lists the various tests

available while in the Service Mode, which

can be accessed by pressing the following

keys:

The off key must be pressed twice within

30 seconds in order to cancel this testꢀ

FAST TIME DOWN TEST

SERVICE MODE TABLE

LED Washer:

While in service mode, the pressing of

quick key will advance the program to

the next portion of the wash cycleꢀ (Refer

to page 1-2)

Press Keys

Special Test/Function

Normal

Shows Motor Torque

Wrinkle Free Membrane Pad Check

Quick

Spin

Fast Time Down Test

Quick Spin Test

Displays Software Revision

Number

Light Soil

QUICK SPIN TEST

Delicates

Rinse

Quick Service Cycle

Board Output Test

Help Codes

While in service mode, the pressing of

spin key shall start the washer in the

quick spin mode9

Stain Cycle

Presoak

Diagnostic Codes

Board Input Tests

Hand Wash

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The following Quick Spin test steps are as

follows:

QUICK SERVICE CYCLE

Pressing the delicates key will start a

quick service cycleꢀ This will be a quick

check of all systemsꢀ

1) Lock the doorꢀ

2) Spin to 350 rpm and hold for 6 secondsꢀ

3) Spin to 550 rpm and hold for 6 secondsꢀ

4) Spin to 600 rpm and hold for 6 secondsꢀ

5) Spin to 650 rpm and hold for 6 secondsꢀ

6 Spin to 800 rpm and hold for 6 secondsꢀ

7) Spin to 1000 rpm and hold for 6

secondsꢀ

The following steps will be followedꢀ

If the Spin key is pressed again during the

Quick Spin test, the current speed will be

held indefinitelyꢀ Pressing the Spin key again

will allow the quick test to proceed as listed

aboveꢀ

1ꢀ Energize the cold and bleachꢀ Fill to

Low level, then turn bleach and cold

offꢀ

2ꢀ Energize the hot and fabric softenerꢀ

Fill to high level, then turn all valves offꢀ

When the washer is in the spin cycle

during the Service Mode, the speed will

be displayed as followsꢀ

3ꢀ Tumble using 7/3 tumble pattern for 12

secꢀ

4ꢀ Lock the doorꢀ

Speed Range Displayed

5ꢀ Turn the drain onꢀ

0-99 (actual)

a) 0-99 rpm

6ꢀ Spin to 800 RPM using default ratesꢀ

7ꢀ End spin and Coast downꢀ

8ꢀ Unlock the door when the RPM is zeroꢀ

b) 100-999

rpm

Speed / 10

9ꢀ Display a ‘PA’ on continuously for 10

seconds if no diagnostic codes were

logged during this testꢀ

1st digit

A >=1000 or <1000 RPM

B >=1100 or <1200 RPM

c) 1000 + rpm C >=1200 or <1300 RPM

2nd digit - tens

The up arrow if pressed will advance to

the next stepꢀ The right most dot should

be turned on as an indication of failure and

stay on until quick service cycle test has

reached the endꢀ Any diagnostic code

logged during this test should result in

failure of the test, but should not necessar-

ily stop the testꢀ

Example: A2 = 1020 RPM

1160 RPM

If any steps in the quick service cycle fail,

then a service mode is entered, and the

first diagnostic code that was logged

would be displayedꢀ

While in quick service cycle, the pressing

of the hand wash will suspend the ma-

chine at this step until the Hand Wash key

is pressed again up to 30 minutesꢀ All

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LED’s will flash on and off while the cycle

is pausedꢀ

Key Pressed:

Cotton/sturdy

Wrinkle Free

Delicates

Function Performed

Hot Water Valve

Cold Water Valve

Bleach Valve

BOARD INPUT TEST

While in service mode press the hand

wash key places the washer into the

Board Input Testꢀ

Hand Wash

Presoaks

Fabric Softener Valve

Drain Pump

Key Pressed:

Function:

Feedback:

Stain Cycle

Motor Control

Cotton/Sturdy Door Position "d0" Open

"d1" Closed

Unlock Door (Sends a pulse

every 2 seconds)

Lock Door (Sends a pulse

every 2 seconds)

Extra Rinse

Max Extract

Delicates

Latch Position "L0" Unlocked

"L1" Locked

Wrinkle Free High Water

Level

"~0" Below Level

"~1" Above Level

HELP CODES

Hand Wash

Temp Down

Temp Up

Spin

Low Water

Level

"_0" Below Level

"_1" Above Level

When the washer performs differently

from design, a Help code is identified and

assignedꢀ The severity level is generally

less than that of a diagnostic codeꢀ

Unbalance

Circuit

"u0" Balanced

"u1" Unbalanced

Water

Temperature

Degrees * Fꢀ

0-255 *

Accessing The Help Codes

Place the washer into the service mode,

then press the stain cycle keyꢀ A ‘h’ will

display and turn the LED on above the

Stain Cycle keyꢀ

Vibration

Signal

Rinse

Brown Out

Level

0-225 *

Quick

Acceleromet- PA = Passes

er circuit FA = Fails

*Two digit display =0-99; max extract LED=100;

Max extract LED and extra rinse LED=200ꢀ

BOARD OUTPUT TEST

The Help codes can be reviewed by using

the arrow keysꢀ The up/down arrow will

go track up/down the list one code at a

timeꢀ The first code to display will be the

latest code generatedꢀ The oldest code

will be on the bottom of the listꢀ If there

are no help codes available, ‘- -‘ will be

displayedꢀ If the code happened on the

previous cycle, then the rightmost dot will

be turned onꢀ

While in service mode, pressing the rinse

key places the washer into the Board

Output testꢀ This test will turn on a speci-

fied output after a key pressꢀ All output

will be turned off after 10 minutesꢀ or if

another output is selectedꢀ

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Number of Cycles Since Code Assigned

Accessing Diagnostic Codes

While this help code is displayed, if the

extra rinse key is pressed and held, the

machine shall display the number of

cycles ago the Help code occurred while

the key is heldꢀ Also, while this key is

being held, the LED will be turned on by

the keyꢀ When this key is let up, then the

help code is again displayedꢀ If there are

no help codes available, ‘- -‘ will be

displayed while this key is pressedꢀ If the

code is over 99 cycles ago, then ‘- -‘ will

be displayedꢀ

After the machine is in the service mode,

pressing presoak key will display a ‘d’

and turn the LED on above the presoak

keyꢀ The diagnostic codes can be viewed

by using the arrow keysꢀ The down arrow

will go down the listꢀ

Clearing the Help Codes

The first time the down arrow key is

pushed, the newest code is displayed

The up arrow will go up the list one code

each time it is pushed with no wrapꢀ The

topmost will be a ‘d’ꢀ The bottommost

will be the oldest codeꢀ If there is no

diagnostic codes available, ‘- -‘ will be

displayed for the diagnostic codeꢀ If the

code happened on the previous cycle,

then the rightmost dot should be turned

onꢀ

The list of Help Codes can be cleared from

the memory of the board, by pressing

heavy soil and stain keys for 3 seconds

while viewing the listꢀ

For a listing of available Help codes, see

Section 5: DIAGNOSTIC/HELP CODE

TABLESꢀ

DIAGNOSTIC CODES:

Number of Cycles Since Code Assigned

When a problem with the wash system is

detected a diagnostic code is assigned

and logged into the control board

memory with the last cycle count at which

it occurredꢀ Diagnostic codes are

While this diagnostic code is displayed, if

the cotton/sturdy key is pressed and

held, the machine shall display the

number of cycles ago the diagnostic code

occurred while the key is heldꢀ Also,

while this key is being held, the LED

should be turned on by the keyꢀ When

this key is let up, then the diagnostic code

is again displayedꢀ If there is no

diagnostic codes available, ‘- -‘ will be

displayed while this key is pressedꢀ If the

code is over 99 cycles ago, then ‘- -‘ will

be displayedꢀ

generally more severe than a Help codeꢀ

In some cases, when the washer shuts

down, something shall be displayed on

the display until the consumer presses a

key or opens the doorꢀ See the table for

specific actions or references to where

the proper action is definedꢀ

Clearing Diagnostic Code List

The diagnostic code list can be cleared

from memory, by pressing heavy soil and

presoak keys for 3 seconds while viewing

the listꢀ

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ACCESSING SERVICE MODE

Service Tests

LCD WASHER:

Press and hold the back and help keys for

5 seconds to enter the Service Modeꢀ

Service Tests

user interface test

quick spin test

system check

service cycle

advance to

next step

exit service

tests

Pressing the Service Mode keys again,

will take the machine out of the Service

Modeꢀ

The service tests are identical to the LED

washer, except instead of pressing LED

keys, the technician can touch any of the

screens on the washer control panel to

initiateꢀ

The following screen will appear on the

touch screenꢀ

User Interface Tests

Service Mode

upper

left

upper

right

User Interface

Test

diagnostic codes

service test

1ꢀꢀꢀ

2ꢀꢀꢀ

3ꢀꢀꢀ

4ꢀꢀꢀ

####RPM

####torque

unbalance

Touch the four corners and center of the touch

screen in any orderꢀ

center

system check

exit service mode

exit user

interface test

lower

right

lower

left

The Service Mode screen lists four

different touch panels; service tests, RPM/

torque, unbalance diagnostic codes and

exit service modeꢀ Pressing any of the

touch screens will activate a different

screen dedicated to that function, except

RPM/torqueꢀ

This will check the touch screenꢀ The

service technician is prompted to “Touch

the four corners and center of the touch

screen in any orderꢀ" When each area is

pressed, the button display will reverse

imageꢀ If all areas are sensed, the control

will display “Touch screen test passedꢀ" If

any area(s) is not sensed within 10

seconds, the technician will be prompted

to “Touch the area(s) not highlightedꢀ" If

the area can still not be sensed within 10

seconds, the control will display “Touch

If the washer is in operation when the

service mode is activated, the current

spinner RPM, torque and unbalance will

be listedꢀ

The diagnostic codes listed are the last

four codes assigned by the washerꢀ

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screen test failedꢀ" In either case the

screen will step to the next screen to

check the membrane switchesꢀ

Service Cycle

start service

cycle

User Interface

Test

Press "start

service cycle"

or start/pause

button to

begin service

cycle

system check

Touch screen test passedꢀ

Press the switches in any orderꢀ

home

favorites

back

cancel & exit

service cycle

help

start/pause

off

To start a wash cycle in the Service Cycle:

If the washer is not operating in a wash

cycle, touch the icon start service cycle

or start/pause key to begin the service

cycle9

exit user

interface test

This test checks the membrane switches

on the console padꢀ

During a cycle:

The screen displays the status of the

touch screen test that was just performedꢀ

The technician is then prompted to

“Press the 5 keypads in any orderꢀ" When

each key is pressed, it will display in

reverse image and remain that wayꢀ If all

keys are sensed, the control will display

“Membrane switch test passedꢀ" If any

key(s) is not sensed within 10 seconds,

the technician will be prompted to “Touch

the key(s) that are not highlightedꢀ" If

key(s) again are not sensed within 10

seconds, the control will display which

key(s) failedꢀ

While the washer is running, and service

cycle is selected, the following screen will

display and you can perform system

checks of the various inputs and outputs

of the washer by selecting system checkꢀ

(See System Check)

Service Cycle

cancel cycle

system check

The last step of the user interface test is to

display the entire screen in reverse image

for 2 seconds and then resume normal

display modeꢀ This is done as soon as

the membrane switch test is completeꢀ

This is a visual test onlyꢀ

cancel & exit

service cycle

Service Cycle

The service cycle can be run during a

wash/spin cycle or can be used to initiate

a particular cycle in the washerꢀ To access

this, select service cycle in the Service

Modeꢀ

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The service cycle will advance the washer

through various parts of the wash cycle

and will display the following on the

control panelꢀ

The following will be displayed during

the quick spin test:

“Locking the door”

“Spin to 350 RPM”

“Spin to 550 RPM”

• “Cold water fill”

• During the second step of the test, the

technician will be prompted to “Open

and close the door and then restart by

pressing start/pause”ꢀ

• “Locking the door”, “Cold water and

bleach fill” and “Warm water and bleach

fill”

“Spin to 600 RPM”

“Spin to 650 RPM”

“Spin to 800 RPM”

“Spin to 1000 RPM”

“Coast down and unlock at 0 RPM”

Quick spin test complete”

• “Tumble”

• “Hot water fill”

• “Hot water and fabric softener fill” and

“Warm water and fabric softener fill”

• “Static drain”

• “Spin”

• “Coast down and unlock at 0 RPM”

• “Service cycle complete”

Any of the steps in this test can be held or

paused up to 30 minutes, by touching the

start/pause keyꢀꢀ

Skip tuning algorithm: When selected,

the tuning algorithm will be skippedꢀ This

must be selected before tuningꢀ

Enable plaster unbalance detection:

When selected, plaster unbalance

detection will be enabledꢀ This must be

selected before spin startsꢀ

Advance to next step: When this icon is

selected during the cycle, it will advance

to the next step in the service cycleꢀ

Note: This selection is valid only if a

cycle is runningꢀ

Cancel & exit quick spin test: this

returns you to the service tests screenꢀ

Quick Spin

Test

If the washer is already running and the

quick spin test is selected on the service

test screen, the above screen will be

displayedꢀ

Press "start quick spin test" or start/pause

button to begin quick spin test

skip tuning

algorithm

start quick

spin test

Quick Spin Test

cancel cycle

enable plaster

unbalance

detection

cancel & exit

quick spin test

Select start quick spin test or start/

pause key to begin quick spin testꢀ

cancel & exit

quick spin test

The default is that the tuning algorithm will

apply, but it can be skippedꢀ Plaster

detection will default to disabled, but can

be enabledꢀ

2-17

16010486 (16008373-05)

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SYSTEM CHECK

DIAGNOSTIC/HELP CODES

System checks can be run when the

washer is running a wash cycle or notꢀ If

the washer is not in a wash cycle, the

following screen will display and allow the

technician to toggle various components

On/Offꢀ

software version

Diagnostic/Help

cycle count

XXXX

Codes

help codes:

diagnostic codes:

1ꢀꢀꢀ

2ꢀꢀꢀ

3ꢀꢀꢀ

4ꢀꢀꢀ

5ꢀꢀꢀ

6ꢀꢀꢀ

7ꢀꢀꢀ

8ꢀꢀꢀꢀ

9ꢀꢀꢀ

1ꢀꢀꢀ

2ꢀꢀꢀ

3ꢀꢀꢀ

4ꢀꢀꢀ

5ꢀꢀꢀ

6ꢀꢀꢀ

7ꢀꢀꢀ

8ꢀꢀꢀꢀ

9ꢀꢀꢀ

At the same time, the screen will display

the current status of the component

inputs to the control boardꢀ

If the washer is already running a cycle

and the system check is activated, then

the screen will display the status of all the

outputs and inputs to the control boardꢀ

clear

diagnostic codes

exit diagnostic/

help codes

clear

help codes

Diagnostic codes: Display all diagnostic

codesꢀ

To toggle outputs,

press PAUSE and select output below

Help codes: Display all help codesꢀ

Input Status

door closed

door locked

Output Status

hot water on

cold water on

bleach valve on

fabic softener on

drain on

Software version: Display current

software versionꢀ

unbalance detected

wash level (low) speed

rinse level (high) sensed

fill temperature

sump temperature

ambient temperature

RPM

motor control

on heat on

Cycle count: Display the cycle count

exit diagnostic/help codes: Return to

previous screenꢀ

exit system check

cancel cycle

Clear diagnostic codes: Clear the entire

list of diagnostic codesꢀ

Cancel & exit quick spin test: this

returns you to the service tests screenꢀ

Clear help codes: Clear the entire list of

help codesꢀ

Cancel cycle: This will stop the current

cycleꢀ

Software version: Display current

software version

Exit system check: This will exit the

system check screen and revert back to

the previous screen shown on the display

panelꢀꢀ

For a listing of available diagnostic and

help codes, see Section 5: DIAGNOSTIC/

HELP CODE TABLESꢀ

2-18

16010486 (16008373-05)

Revised 02/01

Section 2$ Washer Controls Overview

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Section 3: DIAGNOSTIC/HELP CODE TABLESꢀ

HELP CODES LISTING:

Help

Code

Description

Trigger

Action to be Taken

Plaster Unbalance Unbalance load

Informative only; non-critical condition

Load Detectedꢀ

Reset Seen

condition existed

during initial ramp up

or spin cycleꢀ

Resulted in

redistribution cycleꢀ

Electrical noise

Identify where specifically in the cycle

detected by machine this occurred, to aid in identifying which

control boardꢀ

components may have been initially

actuatedꢀ Check for loose connections

of these components and correct if

necessaryꢀ If random, suspect incoming

power supply to washerꢀ

03-06 (Not Used)

Slow Drain

Low water level

contacts of pressure

switch not seen as

resetting at end of

drain cycleꢀ

Check for restricted drain system,

kinked/plugged drain hose or pumpꢀ

Check pump for proper functionꢀ May

see diagnostic code 01ꢀ

One locked rotor

During startup, the

Informative only; non-critical conditionꢀ

Spinner did not reach

10 rpm within 2 secꢀ

(During Wash/Tumble)

Fill hoses are

reversed

Water valve

Informative only; (LED washer only)

thermistor readings

are contrary to what

is being demanded

by washer control

boardꢀ

Locked rotor

condition during a condition during a

Locked rotor

Informative only; non-critical conditionꢀ

spin

spinꢀ

(Not used)

Low Speed

Unbalance

Detectedꢀ

Opening of unbalance Informative only; not-critical conditionꢀ

switches at speed

<500 rpm

14 (Not used)

15 (Not Used)

3-1

16010486 (16008373-05)

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Help

Code

Description

Trigger

Action to be Taken

Spin suds lock

Suds lock, full on for

1 second within a

spin at less than 500

rpm during a spin

cycle

Too much detergent; non-HE detergent

with suds suppressor being used;

washing clothes with minimal amount of

soils present with normal measure

amount of detergent

(Not used)

Power down

Loss of power

LED washer will also display"PF"

(Not Used)

Fast fill

Fill level reached

within 2 seconds of

fill initation

Possible slow drain scenario present or

customer interrupted wash cycle and

started washer over againꢀ Check for

Diagnostic Code 08

(Not used)

Too much power

at 450-850 rpm

Motor on at full

power for 30 seconds

between 450-850 rpm

Informative Only

24-29 (Not used)

30-32 (Not used)

Excessive Subs

Detected During

wash/tumble

Control board detects Too much detergent; non-HE detergent

motor torque with suds suppressor being used;

fluctuations dropping washing clothes with minimal amount of

in torque readings

soils present with normal measure

amount of detergent

Too much power

at start of spin

Maximum torque

Perform Diagnostic Motor/Motor

requested in spin less Control Board testꢀ Check wire harness

connections at motor, motor control

board (JP4 connector) and machine

control board connection

than 450 rpm

Too much power

during

wash/tumble

Maximum torque

requested in

wash/tumble

Perform Diagnostic Motor/Motor

Control Board testꢀ Check wire harness

connections at motor, motor control

board (JP4 connector) and machine

control board connections

Motor still running Motor still running

after 120 seconds after 120 seconds of

Informative only

of coast down

after a spin

coast down after a

spin

1 minute after start of Informative only

tumble, if speed is >

85 rpmꢀ

Motor running too

fast during tumble

for too long

3-2

16010486 (16008373-05)

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Help

Code

Description

Trigger

Action to be Taken

38-39 (Not Used)

Motor running and Motor running and

Perform Diagnostic Motor/Motor

the Door is not

locked

the door is not locked Control Board testꢀ Check wire harness

connections at motor, motor control

board (JP4 connector)

No tach signal

during door

unlock sequence

Cycle was paused

due to failure to verify code 62 (LCD Only)

tack signal during

Informative only; Refer to Diagnostic

unlock request

Motor control not Cycle was paused

Informative only; Refer to Diagnostic

code 62 (LCD Only)

powered during

unlock

because motor

control not powered

during unlock request

Tach signal

unexpectedly

present during

unlock

Cycle was paused

because the tach

occurred when the

motor control was

powered during

unlock request

Informative only; Refer to Diagnostic

code 62 (LCD Only)

Unlocking

attempts

disallowed

because tach

signal continues

after tach

No tach signal

Informative only; Refer to Diagnostic

code 62 (LCD Only)

observed when

motor control is

powered at the end

of the failed fast

powerup and unlocks

retries

verification

Door locked when

not expected

Check door lock switch for welded

contacts

Cabinet impact

sensed

Cabinet impact

detected by the frame

vibration sensor

Informative only

Door did not lock

after the first try

The door lock switch Check for loose wire connections and

did not go from

for bad door lock sense switch

unlocked to locked

when the door lock

output was energized

3-3

16010486 (16008373-05)

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Section 3$ Teardown & Wiring Information

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DIAGNOSTIC CODES LISTING:

Diagꢀ

Code

Description

Trigger

Action to be Taken

LED - Will display "nd"

LCD - Display washer will not drain

Check for:

•Restricted drain system

•Kinked/plugged drain hose or pump

•Faulty pump

•Loose wire connections

•Bad control board

No drain

The water level fails

to drop below the

low water level in

final spin

The door fails to

unlock

Door failed to unlock LED - Will display "LO"

after 11 attempts

LCD - Display washer will not unlock

Check for:

•Faulty door lock solenoid

•Loose wire connections

•Faulty door lock switch

•Faulty door lock sense switch

•Bad control board

No fill

Continuous fill of 12

minutesꢀ

LED - Will display "nF"

LCD - Display washer will not fill

Check for:

•Clogged inlet screens

•Water Available

•Loose wire connections

•Pressure switch contacts

•Bad control board

The door fails to

lock

Door failed to lock

after 11 attempts

LED - Will display "FL"

LCD - Display washer will not lock

Check for:

•Faulty door lock solenoid

•Loose wire connections

•Faulty door lock switch

•Faulty door lock sense switch

•Bad control board

Continuous

unbalanced circuit unbalanced loadsꢀ

(During spin only)

See section for

Check for:

•Faulty unbalance switches

•Loose wire connections

•Bad control board

Locked rotor

Locked rotor is still

locked after 10

consecutive retry

attempts

LED - Will display "Lr"

LCD - Display motor is not working

Check for:

•Perform Diagnostic motor/motor

control test

•Loose wire connections

•BInded spinner shaft bearings

Heater is not

heating

Heater has been on

for 10 min and water •Loosed wire connections to heater and

Check for: (LCD only)

temperature has not

increased

thermistor

•Faulty thermistor

•Faulty heater

•Perform System Check (page 14)

3-4

16010486 (16008373-05)

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Section 3$ Teardown & Wiring Information

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Diagꢀ

Code

Description

Trigger

Action to be Taken

Water sensor level The low water level

Check for:

•Perform special tests (LED) or system

checks (LCD)

fault

are not satisfied

before the high water

level contacts are

•Loose wire connections

made in the pressure •Faulty pressure switch

switch

(Not Used)

Low rpm

unbalanced load

Never reached 400

rpm due to an

unbalanced load

Check for:

•Loose wire connections

•Faulty unbalance switches

•Unlevel washer; leveling legs not

locked

•Weak floor

Non-volatile

memory error

Difficulty in reading

memory

1ꢀ Clear diagnostic codes

2ꢀ Unplug and replug in power cord

washer at power supply outlet

3ꢀ If a condition still exists, replace

machine control boardꢀ

12-14 (Not Used)

Stuck key

A key is sensed to be 1ꢀ Perform membrane pad check

pressed more than 75 2ꢀ Replace console w/membrane pad

seconds, the key shall

be assumed to be

stuck

assembly if necesary

High speed not

achieved due to

Speed never went

over 400 rpm during

Check for:

• Excessive suds

high motor torque a main wash cycle

because the max

• Faulty pump

• Tight bearings on spinner shaft

• Tight bearings on motor shaft

• Bad motor or machine control board

torque was seen for

too long

Door switch was

not seen open

since the last final complete wash cycleꢀ between wash loads

The door has not

been opened after a

LED - Will display "od"

LCD - Indicate door was not seen open

spin

Door switch was not

seen open since the

last final spin

Check for:

• Faulty door switch (welded contacts)

•Customer may have tried to repeat

wash cycle without opening door

Door lock switch

seen open during read as open with

cycle motor running

Door lock switch is

• Check for loose wire connections

• Clear the diagnostic code and

recheck; if re-occures, perform

diagnostic motor/motor control board

test

•Check for faulty motor relay on the

machine control board

3-5

16010486 (16008373-05)

Revised 2/01

Section 3$ Teardown & Wiring Information

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Diagꢀ-

Code

Description

Trigger

Action to be Taken

Door lock sense or Door lock sense

(LED Washer only)

See list for diagtnostic code 18

motor control

relay failed

switch on machine

control board is read

as open with motor

running

Door switch input Door switch is open

seen open during

cycle

(LED Washer only)

• Loose wire connections

• Faulty door switch

• Customer tried to forcibly open

door while locked

Door sense switch Door sense switch is

failed on machine read as open and the

See diagnostic code 20 or 22

control board

door locked switch is

read as locked

Door switch seen

Door switch is read as • Clear the diagnostic code and

open during cycle open and the door

locked switch is read

recheck; if reoccurs, perform

diagnostic motor/motor control

board test

as locked

• Check for faulty motor relay on the

machine control board

• Loose wire connections

• Faulty door switch

Door failed to

unlock

Door lock is locked

and a user tries to

start a cycle

• Faulty door lock sense switch

• Faulty door lock solenoid

Motor over speed Motor tach signal is

1ꢀ Replace motor control board

seen at maximum

speed

Motor tach signal

exists without

motor running

Tach signal exists

without torque

commandedꢀ

(Abnormal condition

only)

(Not Used)

Valve thermistor

failure

Abnormal high/low

temperature or ohm

resistance seen

• Loose or pinched wires

• Bad water valve

Sump thermistor

failure

Abnormal high/low

temperature or ohm

resistance seen

• Loose or pinched wires

• Bad water valve

(LCD Only)

Door lock switch

sensed locked

during cycle when unlocked period at

not expected

Door became locked

during 30 second

• Faulty door lock sense switch

• Faulty door lock solenoid

(LCD Only)

beginning of cycle

Conditions for

unlock not met

during cycle

(See Help Codes 41,

42, 43)

• Faulty door lock solenoid

• Loose wire connections

• Faulty door lock switch

• Faulty door lock sense switch

• Check for bad motor control board

(LCD Only)

3-6

16010486 (16008373-05)

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GENERAL COMPONENT - EXPLODED VIEW

Component Identification & Location:

3-7

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Glossary of Terms

First Rinse – This is the first rinse following

the main wash portion of the cycleꢀ

Add Fill – This is the additional filling of the

water after the first initial fill to bring the

water level back up to the appropriate level

after the clothes have absorbed the waterꢀ

Key – Any Membrane switch or

touchscreen keypadꢀ

Key press – Any membrane switch key

press or touchscreen pressꢀ

Bleach water valve – This is the coil and

valve assembly that allows water to enter

the bleach dispenser when this coil is

energizedꢀ In order for water to flow, this

coil needs to be energized in conjunction

with a fill water valveꢀ

Non-tempered cold – This will only have

the cold water valve energizedꢀ

Non-tempered warm – This will have both

the cold water valve and the hot water

valve energizedꢀ

Cold water valve – This is the coil and

valve assembly that allows cold water to

enter the machine when this coil is

energizedꢀ

Non-tempered hot – This will only have

the hot water valve energizedꢀ

Diagnostic code – A problem with a

system that is severe enough that the cycle

was stopped and it is recommended the

machine be servicedꢀ

Plaster – This is the point at which the

centrifugal force of the spinning action is

greater than the force of gravity so that the

clothes no longer tumble, but are kept

plastered against the spinnerꢀ

Distribution – A special acceleration profile

used between the spinner speeds of 50

rpm and 85 rpm which is designed to

evenly distribute the clothes loadꢀ

User activity – Any key press or door

opening or closingꢀ

Redistribution – As the machine is

Help code – A system responded

differently than expected, but in most

cases did not cause the cycle to stopꢀ

accelerating into spin, if it detects that the

clothes load is unbalanced and would

cause excessive vibration, it will decelerate

and tumble the clothes in an attempt to

redistribute them in a more uniform

manner so that vibration is reducedꢀ

Hot water valve – This is the coil and valve

assembly that allows hot water to enter the

machine when this coil is energizedꢀ

Softener water valve – This is the coil and

valve assembly that allows water to enter

the fabric softener dispenser when this coil

is energizedꢀ In order for water to flow, this

coil needs to be energized in conjunction

with a fill water valveꢀ

Intermediate Rinse – This is a rinse that

falls between the first rinse and the final

rinseꢀ

Fill water valve – This is a Cold water valve

or a Hot water valveꢀ

Final Rinse – This is the last rinse of the

cycle just preceding the final spin portion

of the cycleꢀ

3-8

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Spin – This is the process of rotating the

clothes at a high speed so that the

centrifugal force extracts the water from

the clothes so that it can be drained from

the machineꢀ

Tumble Flush – This is a tumble at a higher

tumble speed than normal while the

machine is filled with waterꢀ The purpose

of this function is to clean the machine, mix

detergent and during the final rinse to

reduce chance of suds creationꢀ

Spin Speed – This is the speed of the

washer spinner during extractionꢀ

Tumble Speed – This is the speed of the

washer spinnerꢀ

Spinner – This is the wash basket that

holds the clothes and is turned by the

motorꢀ

Tumble drain – When the drain pump is on

while the machine is tumbling at the

specified tumble pattern for the cycleꢀ

Static Drain – This is a drain with no

tumble actionꢀ

Wrinkle Free – This is both a type of fabric

selection (such as with cotton/sturdy,

Delicates, and Hand Wash) and a spin

speed settingꢀ

Tempered – This refers to fills which cycle

the cold or hot water valve to achieve a

desired final temperatureꢀ

Tumble – This is the process of rotating the

clothes in one direction for a time, pausing

for a period and then reversing direction

and repeating this actionꢀ The speed of the

spinner is slow enough so that the clothes

are being tumbled (iꢀeꢀ lifted out of and

dropped back into the water/detergent

solution)ꢀ

3-9

16010486 (16008373-05)

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3-10

16010486 (16008373-05)

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SECTION 4ꢀ ELECTRICAL COMPONENTS & TESTING

Door Lock Test

ELECTRICAL TESTS

The door lock can be verified by the

following procedureꢀ

Warning - Always shut off

electrical power to the

washer before beginning

LED Model

any service repair

1ꢀ Place the washer into Service Modeꢀ

proceduresꢀ

(See Section 2; Accessing Service

Mode)

Grounded Components

2ꢀ Advance to the Board Output Test and

press Max Extract to Lock the door

and Extra Rinse to Unlock the doorꢀ

When performing service diagnostics,

replacements and repairs, always check to

determine whether all ground wires

linking panel and components are

reattached if removedꢀ

LCD Model

1ꢀ Place the washer into Service Modeꢀ

(See Section 2; Accessing Service

Mode)

2ꢀ Select Service Tests, then Quick Spin

Tests to actuate the door lock

mechanismꢀ Hit Cancel to unlock the

doorꢀ

Water Valve Test

The water valve test is similar to the test

outlined in the 16008373 manual, except,

to check the ohm resistance of thermistor,

pull the P3 wire harness connector off the

machine control and locate the P3(6) and

P3(7) leads in the connector on the

machine control boardꢀ Note the

thermistor has been relocated on the

valve to the outlet of the valveꢀ (See

Figure 4-1)

Note: The relay on the control board

for the door lock mechanism is

disabled if the motor control board

indicates the spinner speed is > 7

RPMꢀ

For more information related to door lock

mechanism, please refer to Section 2:

Miscellaneous; Door Lock Philosophyꢀ

Fabric Softner

Bleach

Cold

Hot

Thermistor

4 Coil Water Valve

Figure 4-1

The thermistor is on NTC and will drop in

resistance when the temperature

increasesꢀ

4-1

16010486 (16008373-05)

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Section 4ꢀ Electrical Components & Testing

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DOOR LOCK MECHANISM

Emergency

Cord

Rotating

Cam

Door

Door Open/

Closed Switch

Cam

Lock/Unlock

Solenoid

Door Lock

Spring

Mechanical

Opener

Support

Solenoid

Push-Rod

Locking

Lever

Lamp Socket

& Lamp

Door Lock/

Unlock

Switch

Door Actuator

Figure 4-2

Machine Control

The machine control microprocessor board is located in the control console,

mounted to the plastic consoleꢀ The board receives input from the membrane

pad/touch screen, door lock switches, and the unbalance switchesꢀ The control

also communicates with the motor control board to facilitate the various cycles

and drive the motor for optimum performanceꢀ This is done by monitoring

torque and speed of the motor through the motor control boardꢀ

Figure 4-3

Both incoming and exiting voltage is monitored through the machine control board and

the surrounding circuitryꢀ The following table lists the voltages for the various terminals

on the microprocessor boardꢀ If proper voltage is not present, check switches and

wiring for possible loose connections or open circuits by disconnecting the power

supply and performing continuity checks of individual circuitsꢀ NOTE: Connector P8(2)

(White wire) is Neutral input and L1 input is the connector P6(2) (Black wire), L1 output is

connector P6(3) (Black wire)ꢀ

The machince control board outputs can be verified by placing the washer into the

Service Mode and performing a Board Output Testꢀ (See Section 2; Service Mode;

Board Output Test&)

4-2

16010486 (16008373-05)

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Section 4ꢀ Electrical Components & Testing

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INPUT/OUTPUT VOLTAGES (LCD Washer)

Description

Connector/

Voltage

Comments

Pin Number Pin Number

Bleach water valve output

Chassis Ground

P1(5)

P3(1)

P1(4)

P1(1)

P2(3)

P8(1)

P8(3)

P6(4)

P6(1)

P1(8)

P1(3)

P6(2)

P6(3)

P2(3)

P2(1)

P8(2)

P2(3)

P1(6)

P5(3)

P8(2)

120 VAC

Ground

Cold water valve output

Door Lock output

P8(2)

P3(8)

P8(2)

P8(1)

P8(2)

P3(5)

P2(3)

120 VAC 500-1K ohms

120 VAC 60 millisecond pulse

Door lock switch input

Door switch input

24 VDC

120 VAC

Door unlock output

Drain pump output

Heater - Neutral

120 VAC 60 millisecond pulse

120 VAC

120 VAC MAH7500 Only (~14 ohms)

High water level - input

Hot water valve output

L1 to machine control board

L1 to motor control

Lower water level - input

Motor control tach

Neutral (120 VAC)

120 VAC

120 VAC 500 - 1K ohms

120 VAC

24 VDC

Neutral

Unbalance input

P3(4)

P8(2)

P5(4)

24 VDC

Softener water valve

Sump thermistor

120 VAC

VDC

NTC device (see thermistor

temperature chart - page 4-8 LCD

model only (3K-18K ohms)

Torque PWM

P2(2)

P3(6)

P2(3)

P3(7)

24 VDC

5 VDC

Water valve thermistor

10K-85K ohms)

INPUT/OUTPUT VOLTAGES (LED Washer)

Description

Connector/

Voltage

Comments

Pin Number Pin Number

Bleach water valve output

Chassis Ground

P1(5)

P3(1)

P1(4)

P1(1)

P2(3)

P8(1)

P8(2)

P8(4)

P6(2)

P1(8)

P1(3)

P6(1)

P8(3)

P2(3)

P2(1)

P6(3)

P2(3)

P1(6)

P2(2)

P3(6)

P8(2)

120 VAC

Ground

Cold water valve output

Door Lock output

P8(2)

P3(8)

P8(2)

P8(1)

P8(2)

P3(5)

P2(3)

120 VAC 500-1K ohms

120 VAC 60 millisecond pulse

24 VDC

Door lock switch input

Door switch input

120 VAC

Door unlock output

Drain pump output

(Open)

120 VAC 60 millisecond pulse

120 VAC

High water level - input

Hot water valve output

L1- machine control board

L1- motor control

120 VAC

120 VAC 500 - 1K ohms

120 VAC

Lower water level - input

Motor control tach

Neutral (120 VAC)

24 VDC

Neutral

Unbalance input

P3(4)

P8(2)

P2(3)

P3(7)

24 VDC

Softener water valve

Torque PWM

120 VAC

24 VDC

Water valve thermistor

5 VDC

(10K-85K ohms)

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Membrane Pad Checks

On the MAH5500B washer you can perform the Membrane Pad Check with the control

consoleꢀ (See Section 2; Accessing Service Mode; Membrane Pad Check)

On both washers, you can check the membrane pads, by pulling the P7 connector from

the machine control board and locating the corresponding switch pin numbers in the

ribbon harnessꢀ

LCD Washer

Membrane Pad

Home

Pin Number Pin Number

P7(3)

P7(4)

P7(3)

P7(4)

P7(5)

P7(6)

P7(7)

P7(6)

Favorites

Back

Start/Pause

Off

Help

LED Washer

Membrane Pad

Cotton/Sturdy

Wrinkle free

Delicates

Pin Number Pin Number

P7(4)

P7(5)

P7(6)

P7(4)

P7(5)

P7(6)

P7(4)

P7(6)

P7(5)

P7(6)

P7(5)

P7(6)

P7(5)

P7(6)

P7(4)

P7(5)

P7(6)

P7(10)

P7(11)

P7(12)

P7(11)

P7(12)

P7(11)

P7(13)

P7(14)

P7(6)

Hand wash

Wash/rinse +

Wash/rinse -

Spin

Rinse

Quick

Light soil

Normal soil

Delay wash

Heavy soil

Presoak

Stain Cycle

Extra Rinse

Max extract

Start/pause

Off

P7(14)

P7(15)

P7(16)

P7(15)

P7(16)

Signal -

Signal +

4-4

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DRIVE MOTOR

MOTOR CONTROL BOARD

The drive motor is still a switched reluc-

tance type motorꢀ (For more information,

please refer to manual 16008373, Sec-

tion 4; Drive Motor&)

The motor control is able to determine

the motor's position by monitoring the

active phases in the motorꢀ This is done

by sending pulse signals to the motor and

then timing the echo signalꢀ By doing this,

the motor control is able to deterimine

the motor speed and directionꢀ This

information is then calculated to deter-

mine the motor speedꢀ

The new motor is a sensorless motor

drive systemꢀ The word "sensorless"

indicates that motor direction and speed

detection are performed electrically

without the aid of the sending deviceꢀ

Meaning, the sensor was eliminated from

the end of the motor along with the wire

harness leading to the RPT connection on

the motor control boardꢀ

The motor control has a software switch

in it that will turn off all power devices for

as long as the main voltage is above 133

VACꢀ Once the mains voltage drops

below that voltage, the power devices will

be re-enabled and the motor control will

resume normal operationꢀ

2ꢀ The motor control board bracket is

secured with two screws in front and

secured to the baseframe via a tab on

the bracket inserted into a slot in the

baseframeꢀ

Motor Control Access

Slight modifications were made to the

motor control bracket and the plastic drip

shieldꢀ

Drip Shield Removal

1ꢀ Push the plastic shield on either side of

the locking tab to buckle and unlock

the shield from the motor control

bracketꢀ (Figure 4-4)

Figure 4-4

Motor Control Board Removal

1ꢀ Pull the vertical tab forward and lift the

front of the motor control board and

slide the control forward to lift and

remove the control from the bracketꢀ

(Figure 4-5)

Figure 4-5

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Motor Drive System Test

To check the system, check the board for

proper output to the motor controlꢀ This

is done by performing a board output

checkꢀ Then perform the Motor And

Motor Control Testꢀ

Machine Control Board Output Test

1ꢀ Place the washer into Service Modeꢀ

(See Section 2; Accessing Service

Mode)

Figure 4-6

2ꢀ LED Washer: Access Board Output

Test and press Stain Cycleꢀ This will

send a signal to the motor control to

operate the motorꢀ This will test the

board relay for 120 VAC output to the

motor control boardꢀ Motor will not

operate, because the door is not

lockedꢀ

5ꢀ LED Washer: Select Board Output

Test; close door or push door

acturator button; touch the stain cycle

membrane switchꢀ

LCD Washer: Select System Check;

close door or push door actuator

button: touch Toggle Motor Control

LCD Washer: Access Service Tests

and press system checkꢀ Touch the

screen to toggle the motor control onꢀ

This will test the board relay for 120

VAC output to the motor control

boardꢀ

6ꢀ The motor control will immediately

execute a test routine and the motor

should run, rotating the spinner at 50

rpmꢀ

Motor Phases

7ꢀ If the motor runs, and the spinner

rotates at the proper RPM speed: the

problem lies outside of the motor and

motor control circuitꢀ Disconnect

power to the washer and reconnect

the JP4 Interface connector to the

motor controlꢀ

With the introduction of the sensorless

motor, the Motor Phase Test is no longer

requiredꢀ If the motor experiences a

phase problem, the motor will not runꢀ

Motor & Motor Control Test

1ꢀ Disconnect power to the washerꢀ

If the motor runs, and the spinner

does not rotate: Check for missing

beltꢀ

2ꢀ Remove the front panel and pull the

JP4 Connector from the motor control

boardꢀ (Figure 4-6)

8ꢀ If the motor does not run:

aꢀ Check the 10 amp fuse located on

the control board, either visually or

with an ohm meterꢀ If bad, replace

motor control/wire harness assembly

completelyꢀ (Figure 4-7)

3ꢀ Reconnect the washer power cord to

supply voltageꢀ

4ꢀ Press Help and Back function to acti-

vate Service Modeꢀ

4-6

16010486 (16008373-05)

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Section 4ꢀ Electrical Components & Testing

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HEATER ASSEMBLY

The heater assembly located in the sump

area of the outer tub is only on the

MAH7500, LCD washer onlyꢀ A thermistor

located in the heater assembly monitors

the water termperature in order to cycle

the heater on/off to regulate the proper

temperaturesꢀ

Figure 4-7

After the wash level has been reached, the

control will turn the heater on until the

heater thermistor indicticates the tempera-

ture reaches or exceeds the target main

wash temperatureꢀ Then the control will

de-energize the heaterꢀ The heater will be

turned back on when the heater thermistor

indicates the temperature falls below the

target main wash temperature – 5°F during

the main washꢀ The control will cycle the

heater off again when the temperature

reaches the target wash temperatureꢀ

bꢀ If the fuse is functioning, check the

six semiconductors on the heat sink

visually for any damageꢀ If damaged,

replace motor control/wire harness

assembly completeꢀ

cꢀ If no visible damage is present,

check motor windings for any open

circuitsꢀ (See Figure 4-8 & 4-9) Re-

place motor if necessaryꢀ

The intent is to keep the temperature

between the target main wash tempera-

ture and 5°F below thatꢀ When the heater

is off, it will remain off for at least 10 sec-

onds, and when the heater is turned on, it

will remain on for at least 10 secondsꢀ The

heater should be turned off and will re-

main off when the maximum heater on

time limit is reached (37 minutes), or the

end of the wash period is reachedꢀ The

heater will be turned off at the beginning

of bleach fill at the end of main washꢀ The

heater will be turned off during add fillsꢀ

Figure 4-8

Heater Will Not Turn On

1 The heater will not turn on if the door is

not closed or if there is a problem with

the door sense circuitꢀ

Figure 4-9

9ꢀ Unplug the washer power cord and

replace motor control board connec-

tor JP4 when finishedꢀ

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2 The heater will not turn on if there is a

problem with the low water level

senseꢀ The control is required to see

the low water level go from not satis-

fied to satisfied at the beginning of the

cycle before the heater is turned onꢀ

The heater will be turned off within 30

seconds whenever the wash water

level becomes not satisfiedꢀ

3 The heater will never turn on for more

than the maximum heater on time of

37 minutes, and will not turn on out-

side of Presoak and the main wash

periodꢀ

Thermistor Temperature Chart

User Selections

Main Wash Tempering,

Based on the Water

Heating Targets Using

the Heater Based on the

Heater Thermistor

Valve Thermistor

(Min=-Max= Ohms)

(Min=/Max= Ohms)

No Heating

a) Cold wash - with

energy saver selected

65º F/18º C

(65K-72K ohms)

b) Cold wash - with

energy saver de-selected

Heat to 65º F/18º C

(15=3K - 16=8K ohms)

c) Warm wash - with

energy saver selected

105º F/40=5º C

(20K-30K ohms)

No Heating

d) Warm -with energy

saver de-selected

Heat to 105º F/41º C

(6=2K-6=6K ohms)

e) Hot wash - with energy

saver selected

Hot water

No Heating

f) Hot wash - with energy

saver de-selected

Heat to 130º F/54º C

(3=9K-4= 1K ohms)

4-8

16010486 (16008373-05)

Revised 02/01

Section 4ꢀ Electrical Components & Testing

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SECTION 5ꢀ TEARDOWN & WIRING INFORMATION

5ꢀ For reinstallation, reverse the aforemen-

Warning - Always shut off

electrical power to the unit

before beginning any ser-

vice repair proceduresꢀ

tioned stepsꢀ

MICROPROCESSOR BOARD REMOVAL

1ꢀ Disconnect power to the washerꢀ

2ꢀ Remove the console assemblyꢀ

The replacement console assembly consists

of the console, medallion and membrane

padꢀ

3ꢀ Carefully remove the membrane pad

harness and other wires from the mi-

croprocessor boardꢀ

CONSOLE REMOVAL

1ꢀ Disconnect power to the unitꢀ

2ꢀ Remove the four screws securing the

console to the rear cover plateꢀ

Figure 5-1

Figure 5-3

LCD MODEL

3ꢀ Lay a drop cloth across the top cover

of the washerꢀ

4ꢀ Grasp the top of the console and

gently rock the top of the console

forward away from the rear console

backꢀ Note the hooked tabs on bottom

of the console, which engage the slots

in the top coverꢀ

Figure 5-4

LED MODEL

Figure 5-2

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4ꢀ Remove the four mounting screws

securing the board to the consoleꢀ

CABINET ASSEMBLY

The overall cabinet assembly design is

identical to the MAH4000 washer, except

for the revised door lock mechanism,

door latch hoop and front shroudꢀ for

simplicity reasons, we will address only

the exceptions in this chapterꢀ

5ꢀ Remove the board from the consoleꢀ

6ꢀ Note: To avoid the potential for acci-

dental static discharge damage to the

replacement board, you must be

properly grounded prior to handling

the boardꢀ This can be accomplished

by using a special grounded strap tied

on your wrist and grounded to the

product, or simply touching a

DOOR LATCH HOOP

The latch hoop was redesigned, eliminat-

ing the latch hoop support and springꢀ

grounded source to discharge any

static charge build up on your personꢀ

REMOVAL

7ꢀ Insert the replacement board into the

console and secure the mounting

bracket to the consoleꢀ

1ꢀ Remove the door assembly from the

washerꢀ

8ꢀ Reattach wire harnesses and mem-

brane pad harness to the replacement

machine control boardꢀ

2ꢀ Dissassemble the door assembly by

removing the outer door panelꢀ

3ꢀ Locate the locking tab on the door

latch hoop and pry the tab upꢀ

CONSOLE COVER PLUG

4ꢀ Squeeze the side tabs to disengage

the locating pins on the sides of the

latch hoop from the door linerꢀ

The cover plug inserts into the rear of the

console to fill a cavity void in the consoleꢀ

The plug is secured to the console via a

console screw mounted directly behind itꢀ

5ꢀ Reinstallation is a reversal of the

aforementioned stepsꢀ

Figure 5-5

The cover plug simply fills a void area in

the console for cosmetic purposes onlyꢀ

Figure 5-6

5-2

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An Emergency Access Cord is available

and is accessible by removing the dis-

penser bezelꢀ The nylon cord is located

and pulled in a direction away from the

lock areaꢀ The cord is attached to the

mechanical openerꢀ When the cord is

pulled, the opener will pivot and push the

locking lever into the open positonꢀ

DOOR LOCK MECHANISM

The door lock mechanism is now locked

and unlocked via solenoids, resulting in

faster locking and unlocking of the washer

doorꢀ The mechanism is a non-repairable

assembly and must be replaced as an

assemblyꢀ

DOOR LOCK MECHANISM

Emergency

Cord

Rotating

Cam

Door

Door Open/Closed

Door Lock Switch

Spring

Cam

Lock/Unlock

Solenoid

Mechanical

Opener

Support

Solenoid

Push-Rod

Locking

Lamp Socket

& Lamp

Lever

Door Lock/

Unlock

Switch

Door Actuator

Figure 5-7

Removal

1ꢀ Disconnect power to the washerꢀ

2ꢀ Remove the front panel, dispenser

bezel and lift the top cover to expose

the door lock assemblyꢀ

3ꢀ Remove the individual wire harnesses

from the assembly and the two mount-

ing screwsꢀ

4ꢀ Roll the top of the door lock assembly

forward and lift from the front shroud

assemblyꢀ

Figure 5-8

5-3

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5ꢀ Locate and loosen the valve mounting

screw by turning the screw at least

three full turnsꢀ

REAR ACCESS PANEL

Removal of the access panel gains access to

the rear components of the washer

(Figure 5-9)ꢀ

NOTE: The mounting screw serves as a

locating pin to hold the valve in position

on the mounting bracket" By partially

removing the screw, the water valve can

now be slid to the left and removed from

the bracket (Figure 5-10)"

6ꢀ Carefully lift the valve with the inlet

hoses attached and direct the inlet

hoses through the openings in the valve

mounting bracketꢀ

Figure 5-9

7ꢀ The hoses can be crimped or the water

shut off at the faucetsꢀ Place a towel

below the valve and remove the inlet

hoses from the water valveꢀ

WATER SYSTEM COMPONENTS

Warning - Always shut off

electrical power to the unit

before beginning any ser-

vice repair proceduresꢀ

WATER VALVE

The water valve is accessible from the

front of the machineꢀ The flow rate of the

valve is 4 gpmꢀ

8ꢀ To reinstall, reverse the aforementioned

procedureꢀ

Removal

1ꢀ Discontinue power and water to the

machineꢀ

PRESSURE SWITCH

The pressure switch was relocated from

the console and mounted to a bracket

extension molded as part of the pump

assemblyꢀ A vertical outlet on the pump

has a rubber cap positioned over the outlet

with a spout and is clamped into positionꢀ

The nipple of the pressure switch is in-

serted into the rubber spoutꢀ Pressuriza-

tion in the vertical outlet of the pump

actuates the pressure switch and deter-

mines proper fill levelsꢀ

2ꢀ Remove the front panel and lift the top

coverꢀ

3ꢀ Remove the wire harness connections

to the water valve solenoidsꢀ

4ꢀ Loosen and remove the hose clamps

on the inlet hoses leading away from

the water valveꢀ

5-4

16010486 (16008373-05)

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REMOVAL

REINSTALLATION

1ꢀ Reverse the aforementioned steps 1-4ꢀ

1ꢀ Remove the rear access panel or the

front panel to access the pressure

switchꢀ

2ꢀ IMPORTANT: Reposition the plastic bag

back onto the pressure switchꢀ

2ꢀ Place a towel beneath the pumpꢀ

PUMP ASSEMBLY

3ꢀ Remove the plastic bag covering the

pressure switchꢀ Press in the locking

tabs on the back of the pressure switch

and pivot the pressure switch off the

pump bracketꢀ

The pump is rated at 80 watts and mounts

identically to the pump used in the

MAH3000 washerꢀ The pressure switch

mounting bracket is a molded part of the

pump housingꢀ For removal instructions,

see page 6-4 in the 16008373 manualꢀ

4ꢀ Grasp the pressure switch and lift the

nipple of the pressure switch from the

pump capꢀ

HEATER ASSEMBLY

Figure 5-13

Figure 5-11

The 1000 watt heater is located in the tub

cover below the door openning and above

the sump area of the washerꢀ A thermistor

on the heater regulates the temperature of

the heater to maintain proper water tem-

perature when selectedꢀ The heater is

secured to the tub cover by means of

rubber compressionꢀ An inner mounting

plate is located opposite of the external

mounting plate with a layer of rubber

betweenꢀ When the nut is secured, the

rubber is compressed and expands to seal

the heater entry hole in the tub coverꢀ

Heater resistance is 14 ohmsꢀ

Figure 5-12

5-5

16010486 (16008373-05)

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REMOVAL

ture the detergent dispensed into the top

dispenserꢀ By capturing the detergent, the

washer can provide a better mix of water

and detergent in the wash waterꢀ During

1ꢀ Disconnect power to the washerꢀ

2ꢀ Remove the wires leading to the heater normal operation, the sump cover is

assemblyꢀ flushed of detergent during the wash cycleꢀ

3ꢀ Locate the mounting nut and loosen the REMOVAL

nut by turning the nut in a counter

clockwise directionꢀ This will

uncompress the rubberꢀ

1ꢀ Remove the front panel, tub cover and

the spinnerꢀ

4ꢀ Carefully remove the heater assembly

from the tub coverꢀ (If the heater has

been in place for a period of time, the

rubber may have taken a setꢀ Then a

complete tub cover removal would be

deemed necessary to push the heater

assembly out of the tub coverꢀ)

2ꢀ Remove the mounting screw securing

the cover to the outer tubꢀ

Figure 5-15

3ꢀ Lift the front of the sump cover and

disengage from rear lip of outer tubꢀ

Figure 5-14

Thermistor Removal

The thermistor is press fitted into the

rubber seal of the heaterꢀ To remove,

simply push the thermistor out and reinsert

the replacement thermistorꢀ

Figure 5-16

SUMP COVER

The sump cover is located in the lower rear

area of the outer tub assembly, directly

above the sump area and the drain outletꢀ

The purpose of the sump cover is to cap-

5-6

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WIRING INFORMATION

Please refer to the technical schematic packed in the control console in the washer for up to

date wiring information for the product your are servicingꢀ The schematics on the following

pages are only a general reference at the time this manual was printedꢀ

MAH5500B

5-7

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MAH7500

5-8

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Maytag Appliances Sales Company

Customer Service

240 Edwards Street, SꢀEꢀ

Cleveland, Tennessee 37311

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