ADC Washer ML 96 User Manual

ML-9 6

Service Man u al

American Dryer Corporation

88 Currant Road

Fall River, MA02720-4781

Telephone: (508) 678-9000 / Fax: (508) 678-9447

e-mail: [email protected]

080699DMG/tcosta

ADC Part No. 450406

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IMPORTANT

YOU MUST DISCONNECT and LOCKOUTTHE ELECTRIC SUPPLYandTHE GAS

SUPPLYSUPPLYBEFOREANYCOVERS or GUARDSARE REMOVED FROM THE

MACHINE TOALLOWACCESS FOR CLEANING,ADJUSTING, INSTALLATION, or

TESTING OF ANY EQUIPMENT per OSHA (Occupational Safety and Health

Administration) STANDARDS.

«Attention: Lor des opérations d’entretien

des commandes étiqueter tous fils avant

de les déconnecter. Toute erreur de

câblage peut étre une source de danger et

de panne.»

“Caution: Label all wires prior to

disconnection when servicing controls. Wiring

errors can cause improper operation.”

CAUTION

DRYERS SHOULD NEVER BE LEFT UNATTENDEDWHILE IN OPERATION.

WARNING

CHILDREN SHOULD NOT BEALLOWED TO PLAYON OR NEAR THE DRYER(S).

CHILDREN SHOULD BE SUPERVISED IFNEAR DRYERS IN OPERATION.

FORYOUR SAFETY

DO NOT DRYMOPHEADS INTHE DRYER.

DO NOT USE DRYER INTHE PRESENCE OF DRYCLEANING FUMES.

WARNING

UNDER NO CIRCUMSTANCES should the door switch or the heat circuit devices

ever be disabled.

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WARNING

The dryer must never be operated with any of the back guards, outer tops, or service

panels removed. PERSONALINJURYor FIRE COULD RESULT.

WARNING

DRYER MUST NEVER BE OPERATED WITHOUTTHE LINT FILTER/SCREEN IN

PLACE, EVEN IFAN EXTERNALLINT COLLECTION SYSTEM IS USED.

IMPORTANT

PLEASE OBSERVEALLSAFETYPRECAUTIONS displayed on the equipment and/or

specified in the installation and operator's manual included with the dryer.

Dryers must not be installed or stored in an area where it will be exposed to water or weather.

The wiring diagram for the dryer is located in the front electrical control box area.

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Ta ble of Con t en t s

SECTION I

IMPORTANT INFORMATION ............................................................................... 3

A. Safety Precautions ..................................................................................................................... 3

SECTION II

ROUTINE MAINTENANCE.................................................................................... 5

A. Cleaning .................................................................................................................................... 5

B. Adjustments .............................................................................................................................. 6

C. Lubrication ................................................................................................................................ 6

SECTION III

INSTALLATION REQUIREMENTS ...................................................................... 7

A. Enclosure,Air Supply, and Exhaust Requirements ...................................................................... 7

B. Electrical and Gas Requirements ................................................................................................ 7

C. Operational Service Check Procedure ....................................................................................... 8

SECTION IV

DESCRIPTION OF PARTS.................................................................................... 10

A. Computer Panel (Microprocessor) .......................................................................................... 10

B. Reversing Relay Panel ............................................................................................................. 10

C. HSI (Hot Surface Ignition) Module (Gas Models Only) ............................................................ 11

D. Gas BurnerAssembly .............................................................................................................. 11

E. Drive Motor ............................................................................................................................ 11

F. Drive ShaftAssembly .............................................................................................................. 12

G. Idler ShaftAssembly ............................................................................................................... 12

H. Tumbler (Basket) .................................................................................................................... 12

I. Main Door Switch ................................................................................................................... 13

J. Sail Switch (Gas Models Only) ................................................................................................ 13

K. Burner Hi-Limit (Gas Models Only) ......................................................................................... 13

L. Manual Reset Thermostat ........................................................................................................ 14

M. Lint Screen ............................................................................................................................. 14

N. Lint Drawer Switch ................................................................................................................. 14

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SECTION V

SERVICING .............................................................................................................. 15

A. Computer Controls ................................................................................................................. 15

B. Ignition Controls ...................................................................................................................... 17

C. Manual Reset Burner Hi-Limit Thermostat (Gas Models Only) Replacement ............................ 20

D. Sail SwitchAssembly (Gas Models Only) ................................................................................ 21

E. Front Panel and Main DoorAssemblies ................................................................................... 22

F. Drive Shaft Pulley Replacement ............................................................................................... 25

G. TumblerWheel Replacement on DriveAssembly (Taper Lock Models) .................................... 25

H. Tumbler Wheel Replacement on IdlerAssembly (Taper Lock Models) ..................................... 26

I. BasketAssembly..................................................................................................................... 27

J. 1-15/16 Flange Bearing Replacement ...................................................................................... 27

K. Rotational SensorAssembly .................................................................................................... 28

L. Idler Shaft Pillow Block Bearing Replacement .......................................................................... 29

M. Drive Shaft Pillow Block Bearing Replacement ........................................................................ 29

N. V-BeltAdjustment (Motor to DriveAxle) ................................................................................ 29

O. Motors ................................................................................................................................... 30

P. Motorized Impellor (Blower) Replacement .............................................................................. 31

Q. Lint Door Switch Replacement ................................................................................................ 31

SECTION VI

TROUBLESHOOTING ........................................................................................... 32

SECTION VII

PHASE 6 OPL SYSTEM DIAGNOSTICS ...........................................................36

A. Diagnostic (L.E.D. [Light Emitting Diode] Display) Failure Codes ............................................ 36

B. L.E.D. (Light Emitting Diode) Display Indicators ...................................................................... 38

C. Phase 6 OPL Microprocessor Controller (Computer) Relay Output L.E.D.

(Light Emitting Diode) Indicators ............................................................................................. 39

D. L.E.D. Codes ......................................................................................................................... 43

E. Computer Logic andWiring Diagram ....................................................................................... 45

SECTION VIII

TECHNICAL INFORMATION .............................................................................51

A. Motor Plate (High and LowVoltage) ....................................................................................... 51

B. Data Label .............................................................................................................................. 52

C. How To UseAManometer ..................................................................................................... 53

D. ML-96 Tool List ..................................................................................................................... 54

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SECTION I

IMPORTANT INFORMATION

A. SAFETY PRECAUTIONS

WARNING: For your safety, the information in this manualmust be followed to minimize the risk of

fire or explosion or to prevent property damage, personal injury, or loss of life.

WARNING: The dryer must never be operated with any of the back guards, outer tops, or

service panels removed. PERSONALINJURYor FIRE COULD RESULT.

1. DO NOT store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other

appliance.

2. Purchaser/user should consult the local gas supplier for proper instructions to be followed in the event the user

smells gas. The instructions should be posted in a prominent location.

3. WHAT TO DO IF YOU SMELL GAS.

a. DO NOT try to light any appliance.

b. DO NOT touch any electrical switch.

c. DO NOT use any phone in your building.

d. Clear the room, building, or area of ALL occupants.

e. Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.

f. If you cannot reach your gas supplier, call the fire department.

4. Installation and service must be performed by a qualified installer, service agency, or gas supplier.

5. Dryer(s) must be exhausted to the outdoors.

6. Although ADC produces a very versatile machine, there are some articles that, due to fabric composition or

cleaning method, should not be dried in it.

WARNING: Dry only water-washed fabrics. DO NOT dry articles spotted or washed in dry

cleaning solvents, a combustible detergent, or “all purpose” cleaner.

EXPLOSION COULD RESULT.

WARNING: DO NOT dry rags or articles coated or contaminated with gasoline, kerosene, oil, paint,

wax.

EXPLOSION COULD RESULT.

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WARNING: DO NOT dry mop heads. Contamination by wax or flammable solvents will create a fire

hazard.

WARNING: DO NOT use heat for drying articles that contain plastic, foam, sponge rubber, or

similarly textured rubber materials. Drying in a heated tumbler (basket) may damage

plastics or rubber and also may be a fire hazard.

7. A program should be established for the inspection and cleaning of lint in the heating unit area, exhaust duct

work, and inside the dryer. The frequency of inspection and cleaning can best be determined from experience

at each location.

WARNING: The collection of lint in the burner area and exhaust duct work can create a potential fire

hazard.

8. For personal safety, the dryer must be electrically grounded in accordance with local codes and/or the

National Electrical Code ANSI/NFPA NO. 70-LATEST EDITION or in Canada, the Canadian Electrical

Codes Parts 1 & 2 CSA C22.1-1990 or LATEST EDITION.

NOTE: Failure to do so will VOID THE WARRANTY.

9. UNDER NO CIRCUMSTANCES should the dryer door switches, lint door switch, heat safety circuit

ever be disabled.

WARNING: PERSONALINJURYor FIRE COULD RESULT.

10. This dryer is not to be used in the presence of dry cleaning solvents or fumes.

11. Remove articles from the dryer as soon as the drying cycle has been completed.

WARNING: Articles left in the dryer after the drying and cooling cycles have been completed

can create a fire hazard.

12. DO NOT operate steam dryers with more than 125 PSI (8.61 bars) steam pressure. Excessive steam

pressure can damage steam coil and/or harm personnel.

13. Replace leaking flexible hoses or other steam fixtures immediately. DO NOT operate the dryer with leaking

flexible hoses. PERSONAL INJURY MAY RESULT.

14. READ and FOLLOW ALL CAUTION and DIRECTION LABELS ATTACHED TO THE DRYER.

WARNING: YOU MUST DISCONNECT and LOCKOUTTHE ELECTRIC SUPPLYand

THE GAS SUPPLYBEFOREANYCOVERS or GUARDSARE REMOVED

FROM THE MACHINE TOALLOWACCESS FOR CLEANING,

ADJUSTING, INSTALLATION, orTESTINGOFANYEQUIPMENT per

OSHA(Occupational Safety and HealthAdministration) STANDARDS.

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SECTION II

ROUTINE MAINTENANCE

A. CLEANING

A program and schedule should be established for periodic inspection, cleaning, and removal of lint from various

areas of the dryer, as well as throughout the duct work system. The frequency of cleaning can best be determined

from experience at each location. Maximum operating efficiency is dependent upon proper air circulation. The

accumulation of lint can restrict this airflow. If the guidelines in this section are met, an ADC dryer will provide

many years of efficient, trouble free, and – most importantly – safe operation.

WARNING: LINT FROM MOST FABRICS IS HIGHLYCOMBUSTIBLE. THE

ACCUMULATION OFLINT CAN CREATEAPOTENTIALFIRE HAZARD.

WARNING: KEEPDRYERAREACLEAR and FREE FROM COMBUSTIBLE

MATERIALS, GASOLINE and OTHER FLAMMABLE VAPORS and

LIQUIDS.

NOTE: Suggested time intervals shown for average usage which is considered six (6) to eight (8)

operational (running) hours per day.

Clean lint drawer and screen every third load.

NOTE: Frequency can best be determined at each location.

DAILY

(beginning) of each work shift.

Clean lint from the drawer and screen. Inspect lint screen and replace if torn.

WEEKLY

Clean lint accumulation from lint chamber, thermostat and microprocessor temperature sensor (sensor bracket)

area.

WARNING: To avoid the hazard of electrical shock, discontinue electrical supply to dryer.

90 DAYS

Remove lint from tumbler (basket), drive motors and surrounding areas. Remove lint from gas valve burner area

with a dusting brush or vacuum cleaner attachment.

NOTE: To prevent damage, avoid cleaning or touching ignitor and flame-probe assembly.

Remove lint accumulation from inside control box and at rear area behind control box.

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EVERY 6 MONTHS

Inspect and remove lint accumulation in customer furnished exhaust duct work system and from dryer’s internal

exhaust ducting.

WARNING: THEACCUMULATION OFLINT IN THE EXHAUST DUCTWORK CAN

CREATEAPOTENTIALFIRE HAZARD.

WARNING: DO NOT OBSTRUCT THE FLOW OF COMBUSTION and VENTILATIONAIR.

CHECK CUSTOMER FURNISHED BACK DRAFT DAMPER IN EXHAUST

DUCT WORK. INSPECT and REMOVEANY LINTACCUMULATION WHICH

CAN CAUSE DAMPER TO BIND or STICK.

NOTE: A back draft damper that is sticking partially closed can result in slow drying and shutdown

of the heat circuits safety switches or thermostats.

NOTE: When cleaning dryer cabinets, avoid using harsh abrasives. Aproduct intended for cleaning

appliances is recommended.

B. ADJUSTMENTS

7 DAYS AFTER INSTALLATION and EVERY 6 MONTHS THEREAFTER

Inspect bolts, nuts, screws, (bearing set screws), nonpermanent gas connections (unions, shut-off valves, orifices,

and grounding connections). Motor and drive belts should be examined. Cracked or seriously frayed belts

should be replaced. Tighten loose V-belts when necessary. Complete operational check of controls and valves.

Complete operational check of ALL safety devices (door switch, lint drawer switch, sail switch, burner and hi-

limit thermostats).

C. LUBRICATION

The drive shaft bearings and idler shaft bearings should be lubricated every three (3) months. Use a #3 grease

or equivalent. Lubrication is necessary.

The motor bearings and under normal/most conditions the tumbler bearing are permanently lubricated. It is

physically possible to re-lubricate the tumbler bearing if you choose even though this practice may not be necessary.

Use Industrial Chevron ball or roller bearing SRI grease NLGI2 or its equivalent which has a broad operating

temperature range of 22º F (-6º C) to 350º F (177º C).

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SECTION III

INSTALLATION REQUIREMENTS

Installation should be performed by competent technicians in accordance with local and state codes. In the

absence of these codes, the installation must conform to applicable AMERICAN NATIONAL STANDARDS:

National Fuel Gas Code ANSI.Z223.1-LATEST EDITION or National Electrical Code ANSI/NFPA No. 70-

LATEST EDITION, or in Canada, the installation must conform to applicable Canadian Standards: CAN/CGA-

B149.1-M91 (Natural Gas) or CAN/CGA-B149.2-M91 (L.P. Gas) or LATEST EDITION (for General Installation

and Gas Plumbing) or Canadian Electrical Codes Parts 1 & 2 CSA C22.1-1990 or LATEST EDITION (for

Electrical Connections).

A. ENCLOSURE, AIR SUPPLY, and EXHAUST REQUIREMENTS

NOTE: The following information is very brief and general. For detailed description, refer to the

ML-96 Installation Manual supplied with dryer. (ADC Part No. 113053.)

Bulkheads and partitions around the dryer should be made of noncombustible materials. Allowances should be

made for the opening and closing of the control door and lint door. (Refer to appropriate installation manual for

recommended distances and minimum allowances required.)

When the dryer is operating, it draws in room air, heats it, passes this air through the tumbler (basket), and

exhausts it out of the building. Therefore, the room air must be continually replenished from the outdoors. If the

make-up air is inadequate, drying time and drying efficiency will be adversely affected. Ignition problems and sail

switch “fluttering” problems on gas dryers may result, and you also could have premature motor failure from

overheating. The air supply must be given careful consideration to insure proper performance of each dryer.

IMPORTANT: Make-up air must be provided from a source free of dry cleaning fumes. Make-up

air that is contaminated by dry cleaning fumes will result in irreparable damage to

motors and other dryer components.

Exhaust duct work should be designed and installed by a competent technician. Improperly sized duct work will

create excessive back pressure which will result in slow drying, increased use of energy, and shutdown of the

burner by the airflow (sail) switch, burner hi-limit or lint chamber hi-heat protector thermostat. (Refer to appropriate

Installation Manual for more detail.)

CAUTION: IMPROPERLYSIZED or INSTALLED EXHAUST DUCTWORK CAN

CREATEAPOTENTIALFIRE HAZARD.

B. ELECTRICAL and GAS REQUIREMENTS

It is your responsibility to have ALL electrical connections made by a properly licensed and competent

electrician to assure the electrical installation is adequate and conforms with local and state regulations or codes.

In the absence of such codes, ALL electrical connections, material, and workmanship must conform to the

applicable requirements of the National Electrical Code ANSI/NFPA No. 70-LATEST EDITION, or in Canada,

the Canadian Electrical Codes Parts 1 & 2 CSAC22.1-1990 or LATEST EDITION (for Electrical Connections).

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IMPORTANT: Failure to comply with these codes or ordinances and the requirements stipulated in

this manual can result in personal injury or component failure.

The dryer installation must meet the American National Standard, National Fuel Gas Code ANSI Z223.1-

LATEST EDITION, or in Canada, the Canadian Electrical Codes Parts 1 & 2 CSA C22.1-1990 or LATEST

EDITION (for Electrical Connections) as well as, local codes and ordinances, and must be done by a qualified

technician.

NOTE: Undersized gas piping will result in ignition problems and slow drying and can create a safety

hazard.

The dryer must be connected to the type of gas (natural or L.P. [liquid propane]) indicated on the dryer data

label. If this information DOES NOT agree with the type of gas available, contact the distributor who sold the

dryer or contact the factory.

The gas input ratings shown on the dryer data label are for elevations up to 2,000 feet (610 meters), unless

elevation requirements of over 2,000 feet (610 meters) were specified at the time the dryer order was placed with

the factory. The adjustment for dryers in the field for elevations over 2,000 feet (610 meters) are made by

changing the burner orifices. If this adjustment is necessary, contact the distributor who sold the dryer or contact

the factory.

NOTE: Any burner changes must be made by a qualified technician.

C. OPERATIONAL SERVICE CHECK PROCEDURE

1. Turn on electric power to the dryer.

2. To start dryer:

a. Display will read “READY.”

b. Press “E” on the keyboard (touchpad) of microprocessor controller (computer).

c. The dryer will start and display will show “dRYING MANUAL CYCLE, 30 MIN REMAIN,” then

display the drum temp.

NOTE: Pressing touchpad selections “A,” “B,” “C,” “D,” and “F” will also start the dryer. Six (6)

preprogrammed drying cycles (Athrough F) have been stored in the computer’s memory.

(Refer to computer operator’s manual for details.)

3. Make a complete operational check of ALL the operating controls to assure that the timing is correct,

temperature selection switches are functioning, etc.

4. Make a complete operational check of ALL safety-halted circuits: door switches, hi-limit thermostat, sail

switch, cycling thermostats, etc.

5. For gas dryers a gas pressure test should be taken at the gas valve pressure tap of each dryer to assure that

the water column pressure is correct and consistent.

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NOTE: Water column pressure requirements (measured at the pressure tap on the gas valve body):

Natural Gas - 3.5 inches water column (W.C.) - 8.7 mb.

L.P. Gas - 10.5 inches water column (W.C.) - 26.1 mb.

6. If computer program changes are required, refer to the Phase 6 OPL Operator’s Manual (ADC Part

No. 113022) for details.

7. The dryer should be operated through one complete cycle to assure that no further adjustments are necessary

and that ALL components are functioning properly.

8. Check the electric service phase sequence. While the dryer is operating, check to see if the blower wheel is

rotating in the proper direction. Looking from the front, the blower wheel should spin in the clockwise (CW)

direction. If so, the phasing is correct. If the phasing is incorrect, reverse two (2) leads at connections L1, L2,

or L3 of power supply to the dryer.

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SECTION IV

DESCRIPTION OF PARTS

A. COMPUTER PANEL

(MICROPROCESSOR)

Lifting the control door will reveal the

control panel assembly. Opening the

control panel will allow access to the major

components which include the computer

board and keypad (touchpad). The

keypad (touchpad) inputs to the computer

what temperature and program has been

selected. The computer controls the

entire operation of the machine. It accepts

inputs and gives outputs throughout the

machine.

B. REVERSING RELAY PANEL

Lifting the control door will reveal the

reversing relay box. Located on the back

of the relay box is the reversing relay

panel. Included on this panel is a four (4)

position terminal block, blower overload,

blower contactor, reversing contactor, 24

VAC transformer, fuse or circuit breaker,

ground lug, and an arc suppressor (A.S.)

board.

...with fuses

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C. HSI (HOT SURFACE IGNITION) MODULE (Gas Models Only)

The HSI (Hot Surface Ignition) system consists of a

microprocessor based control module, along with a

hot surface ignitor probe and a flame probe assembly.

The hot surface ignitor is a silicon carbide ignitor that

upon application of 24 VAC will glow bright orange

for the inter-purge time period. Upon ignition, the

resistance in the flame sensor electrode changes and

the information is sent to the HSI (Hot Surface

Ignition) module via the sensor probe lead connection

to the module. Once the resistance is changed and

sensed, the HSI (Hot Surface Ignition) module will

sustain the gas flow (provide 24 VAC power to the

gas valve).

D. GAS BURNER ASSEMBLY

Gas heated dryers are equipped with a

gas burner assembly consisting of three

(3) burner tubes, gas valve, hot surface

ignitor, flame sensor, sail switch, and hi-

limit thermostat. The inlet piping enters

through the rear of the dryer on the left

hand side (viewing from the front) and

runs to the front of the dryer where the

gas valve is located.

E. DRIVE MOTOR

The T.E.F.C. (Totally Enclosed, Fan-Cooled) drive motor is located in

the front left corner (viewing from front) behind the front panel of the

dryer. It sits on an adjustable base so the motor can be easily adjusted

to the left or right, up or down, forward or backward. The drive

motor is a 3 HP motor and operates on 208 to 460 volts, 50/60 Hz,

3-phase (3ø).

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F. DRIVE SHAFT ASSEMBLY

(Viewing from the front of the dryer.)

Behind front panel on the left side of the

dryer, you can view the drive shaft assembly

which consists of a 9-inch (22.86 cm) drive

pulley, two (2) 6-inch (15.24 cm) wheels,

one (1) taper lock bearings, and one (1) 1-

inch (2.54 cm) pillow block bearings.

G. IDLER SHAFT ASSEMBLY

(Viewing from the front of the dryer.)

Behind the front panel on the right side of

the dryer you will view the idler shaft

assembly which consists of one (1) 6-inch

(15.24 cm) wheels, one (1) taperlock

bearings, and two (2) 1-inch (2.54 cm)

pillow block bearings.

H. TUMBLER (BASKET)

The tumbler (basket) consists of a tumbler

(basket) which has four (4) ribs and four

(4) removable perforated panels which are

mounted to the rib sections of the tumbler

(basket) with 1/4-20 x 1/4” socket button

head screws.

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I. MAIN DOOR SWITCH

The main door switch is mounted to the front panel behind the main door. When

the main door opens, the switch will also open, preventing the dryer from operating.

The main door switch is a safety device and should never be disabled.

J. SAIL SWITCH (Gas Models Only)

The sail switch is located on the front of the

burner box. A sail switch consists of a round

damper plate on a lever arm which is in contact

with an electric switch. When the fan or air

blower comes on, it draws air through the gas

burner. This creates a negative pressure inside

the burner box, and this negative pressure pulls

in the round damper and activates the sail

switch. If there is improper airflow, the damper

will not pull in, preventing the burner from

starting. The display will also read “no

airflow” with an audio indication. Improper

airflow can be caused by improperly designed

exhaust ducting where the duct run is too long

or has too many sharp bends in it. It can also

be caused by a lack of make-up air.

K. BURNER HI-LIMIT (Gas Models Only)

The high limit thermostat is a manual reset disc-type thermostat

set at 330º F (166º C) and located near the burner. If the burner

flame gets too hot, this thermostat will shut off the burner. This is

generally caused by low airflow through the dryer. In a hi-limit

situation the display will read “bURNER SAFETYFAIL” with an

audio indication. The manual reset thermostat must be reset

manually or the 24 VAC burner circuit will never be complete.

This will cause the Phase 6 microprocessor (computer) to continue

to go off on “bURNER SAFETY FAIL” with an audio indication.

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L. MANUAL RESET THERMOSTAT

This is located inside the dryer in the lint

compartment above the lint screen. This

thermostat senses the heated air after it passes

through the tumbler (basket). If the air

temperature gets too hot, the thermostat will shut

off the burner. The dryer will not run until the air

temperature cools down. At this time, the manual

reset thermostat must be reset manually or the

24 VAC burner circuit will never be completed.

Tumbler (basket) and blower will run but the dryer

will not heat. If the temperature sensor opens the

display will read “TEMPSENSOR FAILCHECK

TEMP SENSOR FUSE” with an audio indication.

If the thermostat opens the display will read

“dRUM SAFETYFAIL” with an audio indication.

M. LINT SCREEN

The lint screen is located in the front of the dryer in the Lint

Coop Assembly. To clean the lint off the screen simply

brush the screen clean. The lint screen must be kept clean

in order for the dryer to operate properly and efficiently.

Inspect the screen for tears and replace as needed.

N. LINT DRAWER SWITCH

The lint door switch is located in the lint

compartment and attached to the side of the

lint coop. The lint door switch ensures that

the dryer will operate only when the lint door

is completely closed. This is a safety device

and should never be disabled.

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SECTION V

SERVICING

INTRODUCTION

ALL electrical and mechanical service or repairs should be made with the electrical power to the dryer

disconnected (power off).

WARNING: PERSONALINJURYCOULD RESULT.

The information provided in this section should not be misconstrued as a device for use by an untrained person

making repairs. Service work should be performed by competent technicians in accordance with local, state,

and federal codes. When contacting the factory for assistance, always have the dryer model and serial numbers

available.

CAUTION: Observe ALL safety precautions displayed on the dryer or specified in this manual before

and while making repairs.

Before considering replacement, make sure that ALL connectors are in place and making proper contact.

A. COMPUTER CONTROLS

Display Board Replacement

1. Discontinue electrical power to the dryer.

2. Unplug keyboard (touchpad) ribbon from the rear of the computer.

3. Unplug ribbon cable assembly from the rear of the computer.

4. Remove the two (2) screws securing the computer to the computer box door. Remove the computer by

pulling the other two (2) corners off the clinch studs.

5. Install new display by reversing this procedure.

Computer Board Replacement

1. Disconnect electrical power to the dryer.

2. Unplug keyboard (touchpad) ribbon from

rear of the computer.

3. Unplug ALL wiring harnesses connected

to the computer board.

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4. Remove the two (2) screws securing the computer to the computer panel. Remove the computer by pulling

the other two (2) corners off the clinch studs.

5. Install new computer by reversing this procedure.

Keyboard (Touchpad) Label Assembly Replacement

1. Discontinue electrical power to the dryer.

2. Unplug keyboard (touchpad) ribbon from rear of the computer.

3. Slowly peel off and remove keyboard (touchpad) label assembly from control panel.

4. Peel paper backing off new keyboard (touchpad) label assembly.

5. Holding the new keyboard (touchpad) label assembly close to the panel, insert the keyboard (touchpad) ribbon

through the rectangular slot in the control panel. Align label assembly into position by matching the red

viewing window on the label to the rectangular cutout in the panel and gently press into place.

6. Connect keyboard (touchpad) ribbon to the computer.

7. Reestablish electrical power to the dryer.

Microprocessor Temperature Sensor Probe Replacement

1. Discontinue electrical power to the dryer.

2. Remove perforated panel from tumbler (basket).

3. Remove microprocessor sensor bracket assembly from dryer.

a. Disconnect sensor bracket harness connector.

b. Loosen the two (2) Phillips head screws which secure bracket

assembly to dryer and remove bracket from dryer.

NOTE: DO NOT remove screws.

4. Disassemble sensor probe from bracket assembly by removing the top push-on fastener securing the probe

from bracket. Use a small screwdriver to slowly pry the fastener off.

5. Disconnect the two (2) “orange” wires from the high heat (225º F [107º C]) thermostat, and remove modular

bracket connector, wires, and probe from bracket assembly.

6. Install new sensor probe assembly (ADC P/N 880252) by reversing procedure.

7. Reestablish electrical power to the dryer.

NOTE: If, when electrical power is reestablished, the computer display reads “TEMPSENSOR FAIL

CHECK TEMP SENSOR FUSE,” check for a loose connection in the wiring.

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B. IGNITION CONTROLS

Hot Surface Ignition Module Replacement

(refer to burner illustration on page 11)

1. Discontinue electrical power to the dryer.

2. Disconnect wire from S1 and GND on the HSI (Hot

Surface Ignition) module.

3. Disassemble ignitor from burner by removing the one

(1) self tapping screw.

4. Reverse procedure for installation of new ignitor.

NOTE: Before reestablishing electrical power to the dryer visually check the following (refer to

illustration above).

5. Reestablish procedure for installation of new ignitor.

Flame Sensor Probe Replacement

1. Discontinue electrical power to the dryer.

2. Disconnect the “red” wire from the flame sensor

probe which goes to S2 on the HSI (Hot Surface

Ignition) module.

3. Disassemble flame sensor probe from burner by

removing the one (1) self tapping screw.

4. Reverse procedure for installation of new flame sensor probe.

NOTE: Before reestablishing electrical power to the dryer visually check the following (refer to

illustration above).

5. Reestablish procedure for installation of new ignitor.

Hot Surface Ignitor Flame Sensor Probe

1. Disconnect electrical power to the dryer.

2. Disconnect the hot surface ignitor wires S1 and ground (GND) on the HSI (Hot Surface Ignition) Module.

3. Disasemble Hot Surface Ignitor Probe from the burner by removing the one (1) self tapping screw.

4. Reverse procedure for installation of new hot surface ignitor.

NOTE: Before reestablishing electrical power to the dryer visually check the following (refer to

illustration above).

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NOTE: DO NOT WRAP THE HOT SURFACE IGNITOR WIRES AND THE FLAME

ELECTRODE WIRE TOGETHER. IMPROPER OPERATION MAY RESULT.

THEY MAY RUN ALONGSIDE EACH OTHER.

5. Reestablish procedure for installation of new ignitor.

Gas Valve Replacement (Refer to burner illustration on page 11)

1. Discontinue electrical power to the dryer.

2. Close shut-off valves in gas supply line.

3. Disconnect gas valve wiring.

NOTE: Identify location of each wire for correct reinstallation.

4. Unscrew (break) union connection before gas valve.

5. Loosen and remove four (4) screws securing pipe brackets to burner.

6. Remove valve and manifold assembly from dryer.

7. Remove valve mounting bracket, manifold and piping from gas valve.

8. Reverse procedure for installing new gas valve.

WARNING: Test ALL connections for leaks by brushing on a soapy water solution.

WARNING: NEVER TEST FOR LEAKS WITH A FLAME!!!

Main Burner Orifices Replacement

1. Refer to “To Replace Gas Valve” and follow Step #1 through Step #6.

2. Unscrew main burner orifices and replace.

NOTE: Use extreme care when removing and replacing orifices. These orifices are made of brass and

are easily damaged.

3. Reverse the removal procedure for reinstalling.

WARNING: Test ALL connections for leaks by brushing on a soapy water solution.

WARNING: NEVER TEST FOR LEAKS WITHA FLAME!!!

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To Test and Adjust Gas (Water Column) Pressure

There are two (2) types of devices commonly used to measure column pressure. They are spring and mechanical-

type gauges and manometers. The spring and mechanical-type gauge is not recommended, because it is easily

damaged and not always accurate. A manometer is simply a glass or transparent plastic tube with a scale in

inches. When filled with water and pressure applied, the water in the tube rises showing the exact water column

pressure.

NOTE: Manometers are available from the factory by ordering ADC P/N 122804.

1. To test gas water column (W.C.) Pressure:

a. Connect water column test gauge connection to gas valve pressure

tap (1/8” NPT). This pressure tap is located on the outlet (manifold)

side of the valve.

b. Start dryer. With burner on, the correct water column reading in

inches would be:

Natural Gas - 3.5 Inches Water Column (8.7 mb).

L.P. Gas - 10.5 Inches Water Column (26.1 mb).

2. To adjust water column pressure (natural gas only, L.P. gas must be

regulated at source):

a. Remove the slotted vent cap on the top of the valve.

b. Turn the slotted adjustment screw located on the top of the valve

next to the terminals. Turn clockwise (CW) to increase manifold

pressure and counterclockwise (CCW) to decrease.

NOTE: If correct W.C. pressure cannot be achieved, problems may be due to an undersized gas supply

line, a faulty or underrated gas meter, etc.

To Convert Natural Gas to L.P. Gas

NOTE: ALL dryers are sold as natural gas, unless otherwise specified at the time the dryer order was

placed. For L.P. gas the dryer must be converted as follows.

1. Refer to “Replace Gas Valve” and follow Step #1 through Step #6.

a. For models with 3/4” White-Rodgers valve.

1) Remove top vent cap.

2) Insert spring and pin.

3) Replace vent cap.

2. Unscrew main burner orifices and replace with L.P. orifices.

NOTE: Use extreme care when removing orifices. They are made of brass and are easily damaged.

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3. Reverse the procedure for reinstalling valve assembly to the dryer.

WARNING: Test ALL connections for leaks by brushing on a soapy water solution.

WARNING: NEVER TEST FOR LEAKS WITH A FLAME!!!

NOTE: There is no regulator provided in an L.P. dryer. The column pressuremust be regulated at the

source (L.P. tank) or an external regulator must be added to each dryer.

Burner Tubes Replacement

1. Refer to “Replace Gas Valve” and follow Step

#1 through Step #6.

2. Remove four (4) screws securing the HSI (Hot

Surface Ignition) module mounting bracket.

3. Remove front flanges of the burner tubes to the

burner tube rest.

4. Remove the screws securing the burner tube rest

to the oven and remove this rest.

5. Remove screws securing burner box cover plate to the oven and remove the cover.

6. Remove burner tubes by sliding them out.

7. Replace by reversing procedure.

WARNING: Test ALL connections for leaks by brushing on a soapy water solution.

WARNING: NEVER TEST FOR LEAKS WITHA FLAME!!!

HSI (Hot Surface Ignition) Module Replacement

1. Discontinue electrical power to the dryer.

2. Remove the wires connected to the terminal strip at

the bottom of the module. (Mark correct location of

each wire to aid in replacement on new module).

3. Remove the four (4) pal nuts securing the module to

the mounting bracket.

4. Replace module by reversing procedure.

5. Reestablish electrical power to the dryer.

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C. MANUAL RESET BURNER HI-LIMIT (330º F [166º C]) THERMOSTAT

REPLACEMENT (Gas Models Only)

1. This thermostat is an important safety device as an added protection against failure of the airflow (sail switch)

to open in the event of motor failure or reduced airflow conditions.

IMPORTANT: UNDER NO CIRCUMSTANCES should

heat circuit safety devices ever be disabled.

NOTE: Models manufactured as of 1998 are equipped with a

manual reset hi-limit thermostat.

1. Discontinue electrical power to the dryer.

2. Disconnect wires from hi-limit thermostat.

3. Remove the two (2) screws, washers and nuts securing thermostat to the bracket. Remove thermostat.

4. Reversing procedure for installing new thermostat.

5. Reestablish electrical power to dryer.

Manual Reset Tumbler Hi-Limit (225º F [107º C]) Thermostat Replacement

This thermostat is part of the “sensor bracket assembly” and is secured to the underside of the basket wrapper in

the lint compartment. As a safety device, this thermostat will open (shut off) the heating unit circuit if an

excessive temperature occurs. The dryer motor will remain on, even if the thermostat is open.

1. Disconnect electrical power to the dryer.

2. Open lint door.

3. Locate sensor bracket assembly. Remove the two (2) bolts

securing bracket assembly to the tumbler (basket) wrapper.

4. Disconnect sensor bracket harness connector and remove

bracket assembly from dryer.

5. Disconnect the two (2) “orange” wires from the thermostat.

6. Disassemble thermostat from bracket assembly by removing the two (2) mounting screws, washers and nuts.

7. Reverse this procedure for installing a hi-heat protector thermostat.

8. Reestablish electrical power to the dryer.

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D. SAIL SWITCH ASSEMBLY (Gas Models Only)

The sail switch is a heat circuit safety device

which controls the burner circuit only. When

the dryer is operating and there is proper

airflow, the sail switch damper pulls in and

closes the sail switch. Providing ALL the other

heat-related circuits are functioning properly,

ignition should now be established. If an

improper airflow occurs, the sail switch damper

will release, and the circuit will open.

Sail Switch Replacement

1. Discontinue electrical power to the dryer.

2. Remove the two (2) screws which hold the sail switch box cover to sail switch box.

3. Disconnect the two (2) wires from the switch.

4. Disassemble sail switch from mounting bracket by removing the two (2) screws securing switch in place.

5. Reverse this procedure for installing new sail switch. Adjust sail switch as described in the next section.

To Adjust Sail Switch

With the dryer operating at a high temperature setting, pull the sail switch away from the burner. The sail switch

should open and extinguish the burner. The dryer will continue to run for 3-minutes or until 100º F (38º C) is

reached. The computer will display “no airflow.” If the sail switch circuit does not operate as described, bend the

actuator arm of the sail switch accordingly until proper operation is achieved. To check proper “open” position of

sail switch, open main door, manually depress main door switch and start dryer. With the main door open and the

dryer operating, the sail switch should be open, and the burner should not come on.

E. FRONT PANEL and MAIN DOOR ASSEMBLIES

Main Door Switch Replacement

1. Discontinue electrical power to the dryer.

2. Open main door.

3. Remove the two (2) Phillips head screws holding the main door switch

bracket assembly in place.

4. Disconnect wiring from switch assembly.

5. Remove the two screws which secure the switch to the housing.

6. Reverse this procedure for installing new door switch assembly.

7. Reestablish electrical power to the dryer.

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IMPORTANT: UNDER NO CIRCUMSTANCES should the door switch be disabled.

Main Door Assembly Replacement

1. Open main door.

2. Holding the door upward remove the two (2) screws from the top hinge block.

3. Lift the door up to remove.

4. Reverse this procedure for reinstalling new main door assembly.

To Install New Main Door Glass

1. Remove main door assembly from dryer (follow main door removal procedure).

2. Lay main door on flat surface with the back of the door facing down.

3. Remove the four (4) #10-32 acorn nuts securing the glass to the door.

4. Remove glass and clean ALL old sealant off main door. This area must be clean for correct bonding.

5. Place a bead of silicone (ADC P/N 170730) around the edge door and lightly press glass into place.

6. Reinstall the four (4) #10-32 acorn nuts that were removed in Step #3.

IMPORTANT: DO NOT press hard or silicone thickness between the glass and door will be

reduced, resulting in poor bonding.

7. The door assembly should now be put in an area where it will not be disturbed for at least 24 hours. Depending

on the conditions, the curing time of this adhesive is 24 to 36 hours.

8. After the curing period, install main door on dryer by reversing Step #1.

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Front Panel Replacement

1. Discontinue electrical power to the dryer.

2. Remove bottom lint drawer assembly.

3. Remove the screws securing the front panel to the dryer.

4. Disconnect the two (2) door switch wires located behind the front panel.

5. Remove the front panel.

IMPORTANT: When pulling the front panel off, the door switch harness in the upper right hand

corner must be unplugged.

NOTE: The main door assembly can be removed to make the panel removal easier. Refer to “Replace

Main DoorAssembly” directions.

6. Reinstall the new front panel by reversing Step #1 through Step #4.

7. Reestablish electrical power to the dryer.

Main Door Hinge Block Replacement

1. Discontinue electrical power to the dryer.

2. Follow procedure for removal of main door assembly for top hinge removal.

3. Remove the two screws from the bottom hinge block.

4. Reassemble by reversing removal procedure.

5. Reestablish electrical power to the dryer.

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F. DRIVE SHAFT PULLEY REPLACEMENT

1. Discontinue electrical power to the dryer.

2. Remove front panel from dryer (Follow front panel

replacement directions on page 24.)

3. Loosen V-belts. Rotate pulley and roll V-belts out of grooves.

4. Remove set screw from the 9” (22.86 cm) pulley.

5. Remove pulley and key.

NOTE: Agear puller may be required to remove pulley.

6. Reverse this procedure for replacement.

NOTE: Pulley must be aligned for proper operation.

Drive Motor Pulley Replacement

1. Discontinue electrical power to the dryer.

2. Remove front panel from the dryer. (Follow front panel replacement directions on page 24).

3. Loosen V-belts. Rotate pulley and roll V-belt out of groove.

4. Remove set screw from the drive motor pulley.

5. Remove pulley and key.

NOTE: Agear puller may be required to remove pulley.

6. Reverse this procedure for replacement.

NOTE: Pulleys must be aligned for proper operation.

G. TUMBLER WHEEL REPLACEMENT ON

DRIVE ASSEMBLY (Taper Lock Models)

1. Discontinue electrical power to the dryer.

2. Remove front panel from dryer. (Follow front panel

replacement directions on page 24.)

3. Remove the ten (10) 1/4-20 x 1/4” socket button head screws

from the perforated basket side.

4. Remove wrapper assembly.

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5. Loosen V-belts. Rotate pulley and V-belts out of the groove.

6. Block the tumbler (basket) assembly in position.

7. Mark the position of pillow block bearing then remove the bolts from the pillow block bearings.

8. Remove the drive shaft assembly through the front of the machine.

9. Remove the set screw from the 9” (22.86 cm) pulley.

10. Remove the pulley and key.

NOTE: Agear pulley may be required to remove the pulley.

11. Remove cap screws from bushing.

12. Insert cap screws in the tapped removal holes and tighten evenly until bushing becomes loose on shaft.

13. Remove the bushing, tumbler wheel, and key.

14. Reverse this procedure for replacement.

IMPORTANT: Tighten screws evenly and progressively. Never allow the sheave to be drawn in

contact with the flange of the bushing. This gap should measure from 1/8” to 1/4”.

Proper cap screw torque is 30 ft-lbs. (41 Nm). If greater tightening forces are

applied, excess pressure will be created in the hub of the mounted sheave which may

cause it to crack.

H. TUMBLER WHEEL REPLACEMENT ON IDLER ASSEMBLY

(Taper Lock Models)

1. Disconnect electrical power to the dryer.

2. Remove the front panel from the dryer. (Follow front panel replacement directions on page 24.)

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3. Remove the ten (10) 1/4-20 x 1/4” socket button head screws from the perforated basket side.

4. Remove the wrapper assembly.

5. Block the tumbler (basket) assembly in position.

6. Mark the position of the pillow block bearings. Then remove the bolts from the pillow block bearing.

7. Remove the idler shaft assembly through the front of the machine.

8. Remove the cap screws from bushing.

9. Insert cap screws in the tapped removal holes and tighten evenly until bushing becomes loose on shaft.

10. Remove the bushing, tumbler wheel and key.

11. Reverse this procedure for replacement.

I. BASKET ASSEMBLY

NOTE: Dryer must be level prior to tumbler (basket) alignment.

1. Discontinue electrical power to the dryer.

2. Remove the perforated tumbler (basket) panel.

3. Remove wrapper panel to access the drive and idler shaft.

4. Place a level on the shafts to verify if level.

5. Measure distance between tumbler (basket) and wrapper 1/2” to 3/4” gap should be derived.

6. Loosen the eight (8) bolts on the pillow block bearings and turn the adjustment screw clockwise (CW) or

counterclockwise (CCW) to increase or decrease the gap between the tumbler (basket) and wrapper.

7. Measure the length of the adjustment bolts and ALL should be equal.

8. Place a level on the shaft to verify it is level if any adjustment has been made.

9. Check the basket drive belt for proper tension. Adjust if necessary.

10. Replace the wrapper panels.

11. Replace the perforated tumbler (basket) panel.

J. 1-15/16 FLANGE BEARING REPLACEMENT

1. Disconnect electrical power to the dryer.

2. Remove the four (4) bolts securing the bearing cap located in the rear of the dryer. And remove.

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3. Depress the tabs on the rotational sensor harness plug and pull apart.

4. Remove the retaining ring from the tumbler shaft.

5. Remove the four (4) bolts, lock washers and flat washers securing the flange bearing to the dryer cabinet.

6. Loosen the set screws from the flange bearing.

7. Remove the flange bearing from the tumbler shaft.

8. To replace new flange bearing reverse Step #2 through Step #8.

9. Reestablish electrical power to the dryer.

K. ROTATIONAL SENSOR ASSEMBLY

The Rotational Sensor Assembly is located in the rear of the dryer. It consists of a magnet which rotational

switch, mounted to the bearing cap is riveted to the 1-15/16 (5 cm) Flange Bearing.

The magnetic rotational sensor switch senses the rotation of the tumbler (basket). If the gap between the sensor

switch and the magnet is greater than a preset amount, then the dryer will shut down on “SEFL” (“rotational

sensor failure”).

1. To Replace Rotational Sensor Switch.

a. Discontinue electrical power to the dryer.

b. Remove the bearing cap from the dryer.

c. Remove the adjustment nut from the bearing cap.

d. Remove the magnetic rotational sensor switch from the bearing cap.

e. Depress the tabs on the rotational sensor harness plug and pull apart, then remove the sensor switch.

f. To install a new sensor switch, connect the plug of the new sensor switch to the sensor harness.

g. Place one (1) adjustment nut onto the sensor

switch and insert into the bearing cap.

h. Place the second adjustment nut on but DO

NOT TIGHTEN. The magnet on the

Flange Bearing and the sensor switch must

be in a horizontal line to one another.

i. The gap between the magnet and the sensor

switch must be 1/8-inch.

j. Tighten the adjustment nuts installed in Step

#6 and Step #7.

k. Reestablish electrical power to the dryer.

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L. IDLER SHAFT PILLOW BLOCK BEARING REPLACEMENT

1. Refer to tumbler wheel replacement on idler assembly page 26.

2. Complete Step #1 through Step #11.

3. Remove both set screws from each pillow block bearing.

4. Remove pillow block bearing from shaft.

5. Reverse this procedure for replacement.

NOTE: Once the shaft assembly has been installed into dryer. Return pillow block bearings to the

marked position and tighten set screws.

6. Refer to basket assembly section page 27 for shaft and basket alignment.

M. DRIVE SHAFT PILLOW BLOCK BEARING REPLACEMENT

1. Refer to tumbler wheel replacement on drive assembly page 25.

2. Complete Step #1 through Step #14.

3. Remove both set screws from each pillow block bearing.

4. Remove pillow block bearings from shaft.

5. Reverse this procedure for replacement.

NOTE: Once the shaft assembly has been installed into dryer. Return pillow block bearing to the

marked position and tighten set screws.

6. Refer to basket assembly section page 27 for shaft and basket alignment.

N. V-BELTADJUSTMENT (Motor to Drive Axle)

1. Discontinue electrical power to the dryer.

2. Remove the belt guard cover from the rear of the dryer.

3. Loosen the four (4) bolts holding the drive motor mount to the side of the dryer.

4. Loosen the jam nuts on the adjustment screw on the top of the motor mount.

5. Turn the adjustment screw to lower the motor mount (to tighten the belts) or raise the motor mount (to loosen

the belts.)

6. Check the vertical plane of the motor and idler pulleys for parallel adjustment.

7. If realignment is required, loosen motor pulley and bushing, and move motor pulley to proper position.

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8. Retighten motor mount bolts and jam nuts.

9. Assemble front panel lint door assemblies back to dryer.

10. Reestablish electrical power to the dryer.

Drive Motor V-Belts Replacement

1. Discontinue electrical power to the dryer.

2. Remove the belt guard cover from the rear of the dryer.

3. Loosen tension on V-belt so that it can easily be rolled off pulley. This can be done by loosening the four (4)

bolts holding the motor to the side of the dryer, as well as the adjustment bolt on top.

4. Replace V-belt.

5. Retighten V-belt and adjust tension and alignment per previous instructions.

O. MOTORS

Drive Motor Replacement

1. Discontinue electrical power to the dryer.

2. Remove the belt guard cover from the rear of the

dryer.

3. Remove drive belt.

4. Disconnect wiring harness from motor.

5. Remove bolts holding motor to mount and replace

with new motor. DO NOT TIGHTEN BOLTS.

6. Remove pulley from old motor and install on new

motor. By removing the set screw from the drive

motor pulley.

NOTE: Agear puller may be required to remove pulley.

7. Align motor pulley with drive assembly pulley and tighten set screw holding motor pulley.

8. Replace belts and adjust belt tension.

9. Retighten bolts.

10. Reestablish electrical power to the dryer.

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P. MOTORIZED IMPELLOR (BLOWER) REPLACEMENT

1. Discontinue electrical power to the dryer.

2. Remove lint draw.

3. Remove the perforated panel inside the tumbler

(basket).

4. Remove the bolts securing the inlet cone.

5. Remove the inlet cone.

6. Remove the bolts securing the motor plate to the

dryer cabinet.

7. Remove the motorized impellor along with the motor

plate.

NOTE: The motorized impellor assembly will not be able to be removed due to the wiring harness still

connected.

8. Disconnect the wiring harness from motor.

9. Remove the motor plate from the motorized impellor and install it on the new motor.

10. Reconnect the wiring harness to the motor.

11. To replace new motorized impellor assembly, reverse Step #10 through Step #2.

12. Reestablish electrical power to the dryer.

Q. LINT DOOR SWITCH REPLACEMENT

1. Disconnect electrical power to the dryer.

2. Remove the lint door panel.

3. Remove the front panel.

4. Disconnect both 4-pin connectors at the rear

of the lint switch cover.

5. Remove the two (2) screws holding the lint

switch cover on.

6. Remove the lint switch cover and disconnect the two (2) terminals of the switch.

7. Remove switch by pressing tabs together and pushing switch out.

8. Install new lint door switch by reversing these procedures.

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SECTION VI

TROUBLESHOOTING

IMPORTANT: YOU MUST DISCONNECTand LOCKOUTTHE ELECTRIC SUPPLYand

THE GAS SUPPLYBEFOREANYCOVERS or GUARDSARE REMOVED

FROM THE MACHINE TOALLOWACCESS FOR CLEANING,

ADJUSTING, INSTALLATION, orTESTINGOFANYEQUIPMENT per

OSHA(Occupational Safety and HealthAdministration) STANDARDS.

The information provided will help isolate the most probable component(s) associated with the difficulty

described. The experienced technician realizes, however, that a loose connection or broken/shorted wire may be

at fault where electrical components are concerned...and not necessarily the suspected component itself.

IMPORTANT: When replacing blown fuses, the replacement must be of the exact rating as the fuse

being replaced. The information provided should not be misconstrued as a

handbook for use by an untrained person in making repairs.

WARNING: ALL SERVICE and TROUBLESHOOTING SHOULD BE PERFORMED BY

AQUALIFIED PROFESSIONALor SERVICEAGENCY.

WARNING: WHILE MAKINGREPAIRS, OBSERVEALLSAFETYPRECAUTIONS

DISPLAYED ON THE DRYER or SPECIFIED IN THIS MANUAL.

A. No L.E.D. (light emitting diode) display on microprocessor controller (computer)...

1. Open circuit breaker switch or blown fuse.

2. Tripped blower motor overload.

3. Faulty wiring connection.

4. Faulty transformer.

5. “EMERGENCY STOP” (E-Stop) button is depressed.

6. Faulty microprocessor controller (computer).

B. Computer will not accept keypad (touchpad) entries...

1. Keypad (touchpad) ribbon is not plugged into computer securely.

2. Faulty keypad (touchpad).

3. Faulty microprocessor controller (computer).

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C. Dryer will not start, but computer L.E.D. (light emitting diode) indicators are on...

1. Failed contactors.

2. Failed arc suppressor (A.S.) board.

3. Failed microprocessor controller (computer).

4. Failed motors.

D. Drive motor runs, burner is on, but tumbler (basket) will not turn...

1. Broken, damaged or loose V-belt.

2. Belts contaminated (oil, grease, etc.).

3. Loose or broken pulley.

E. Dryer operates but is taking too long to dry...

1. Improperly programmed microprocessor controller (computer).

2. An inadequate exhaust duct work system.

3. Restriction in exhaust system.

4. Insufficient make-up air.

5. Poor housekeeping.

a. Dirty or clogged lint screen.

6. Washing machine extractors are not performing properly.

7. An exceptionally cold/humid or low barometric pressure atmosphere.

8. The supply gas may have a low heating valve, check with local gas supplier.

9. Failed temperature sensor (temperature calibration is incorrect).

10. Failed microprocessor controller (computer).

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F. Thermal overload for drive motor is tripping...

1. Either an exceptionally low or high voltage supply.

2. Motor bearing failure.

3. Motor vents are blocked with lint.

4. Failed motor.

5. Failed overload.

6. Out of balance impellor (fan).

7. Insufficient make-up air.

G. Overload for impellor (fan) motor is tripping...

1. Either an exceptionally low or high voltage supply.

2. Motor bearing failure.

3. Motor vents are blocked with lint.

4. Failed motor.

5. Failed overload.

6. Insufficient make-up air.

H. Burner hi-limit safety thermostat is tripping...

1. Insufficient exhaust duct work, size or restriction in exhaust system.

2. Insufficient make-up air.

3. Lint screen needs cleaning.

4. Damaged impellor (fan).

NOTE: For models with the manual reset hi-limit thermostat refer to page 20.

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I. L.E.D. (light emitting diode) display reads “Temp Sensor Failure Check Temp Sensor Fuse.”

Dryer Sensor Circuit Failure...

1. Check 1/8-amp fuse on microprocessor controller (computer).

2. Faulty microprocessor temperature sensor probe.

3. Open circuit in either one of two (2) wires leading from the sensor probe to the computer...

a. Connection at sensor bracket assembly connector.

b. Connection at computer harness connector.

4. Faulty microprocessor controller (computer).

J. Dryer does not start. Display reads “main door” or “lint door” with an audio indication...

1. Main door is open.

2. Lint drawer is open.

3. Faulty main door or lint door switch.

4. Open circuit in either main door or lint drawer switch harnesses.

5. Faulty 24 VAC transformer.

K. There is excessive vibration coming from the tumbler (basket)...

1. Tumbler (basket) is out of adjustment.

2. Drive shaft or idler shaft is out of alignment.

3. Faulty pillow block bearing.

4. Faulty tumbler wheel.

5. Drive motor and shaft not aligned.

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SECTION VII

PHASE 6 OPL SYSTEM DIAGNOSTICS

IMPORTANT: YOU MUST DISCONNECT and LOCKOUTTHE ELECTRIC SUPPLYand

THE GAS SUPPLYBEFOREANYCOVERS or GUARDSARE REMOVED

FROM THE MACHINE TOALLOWACCESS FOR CLEANING,

ADJUSTING, INSTALLATION, orTESTINGOFANYEQUIPMENT per

OSHA(Occupational Safety and HealthAdministration) STANDARDS.

ALL major circuits, including door, microprocessor temperature sensor, heat and motor circuits are monitored.

The Phase 6 OPL microprocessor controller (computer) will inform the user, via the L.E.D. (light emitting diode)

display of certain failure codes, along with indicators both in L.E.D. (light emitting diode) display and at the output

of each relay (and door switch circuit) to easily identify failures.

A. DIAGNOSTIC (L.E.D. [Light Emitting Diode] DISPLAY) FAILURE CODES

1. SAIL SWITCH FAIL- This routine will prevent start up on the machine unless the sail switch is in the

correct position. If the sail switch is closed prior to start up the display will read “SAIL SWITCH FAIL”

along with an audio indication.

2. No AIRFLOW- If the sail switch opens during cycle operation the display will read “No AIRFLOW”

along with an audio indication. The machine will continue to run with no heat for three (3) minutes or until

the temperature drops below 100º F (38º C). Upon failure the machine will shut down and display “No

AIRFLOW” with an audio indication.

3. bURNER SAFETY FAIL- Routine monitors the temperature above the burner. If the burner hi-limit

switch opens the display will read “bURNER SAFETY FAIL.” The machine will run with no heat for

three (3) minutes or until the temperature drops below 100º F (38º C). Upon failure the machine will shut

down and display “bURNER SAFETY FAIL” with an audio indication.

4. dRUM SAFETY FAIL- This routine monitors the tumbler (basket) temperature if the tumbler (basket)

hi-limit switch opens prior or during the cycle while the heat was on the machine will display “dRUM

SAFETYFAIL.” The machine will continue to run with no heat for three (3) minutes or until the temperature

drops below 100º F (38º C). Upon failure the machine will shut down and display “dRUM SAFETY

FAIL” with an audio indication.

5. No HEAT- This routine monitors the burner ignition. If the burner mis-ignites (does not light) the HSI

(Hot Surface Ignition) module will check to see of the microprocessor program has any retries left. The

standard retry count is two (2). If the module notices that there are retries left it will purge for one (1)

minute then try to ignite the burner again. The HSI (Hot Surface Ignition) module will try this for a total

of three (3) times or until there are no retries left. If the burner does not ignite after three (3) attempts the

L.E.D. display will display the error code “no heat” with an audio indication. When this occurs the

machine will run with no heat for three (3) minutes or until the temperature drops below 100º F (38º C).

IMPORTANT: For other countries, such asAustralia, the retry count may not apply due to local

approvals.

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6. bURNER CONTROL FAIL- This routine monitors the ignition control’s gas valve output response. If

the valve output signal is not present from the ignition control within the valve time limits the Phase 6

microprocessor controller (computer) determines the ignition control has failed. If this occurs when the

cycle is active the machine will display “bURNER CONTROL FAIL.” If the tumbler temperature is

above 100º F (38º C) the machine will continue to display “bURNER CONTROL FAIL.” The machine

will run with no heat for three (3) minutes or until the temperature drops below 100º F (38º C). If the

tumbler temperature is below 100º F (38º C) upon failure the machine will shut down and display “bURNER

CONTROL FAIL” with an audio indication.

7. bURNER FLAME FAIL- This routine allows two (2) flame out retries to occur before proceeding into

the error. The count of two (2) will be established every time the call for heat was to occur. Only if it

reaches the count of two (2) before the tumbler temperature has reached the set temperature will this

error be triggered. The machine will run with no heat for three (3) minutes or until the temperature drops

below 100º F (38º C). If the tumbler temperature is below 100º F (38º C) upon failure, the machine will

shut down and display "bURNER FLAME FAIL" with an audio indication. This process will occur every

time the heat output is active.

8. MAIN DOOR- This monitors the door circuit. If the machine was not active and the main door was

opened the display would read “REAdY.” If a program attempt was made with the main doors open the

display will read "MAIN dOOR" with an audio indication. If the machine is active and the main door was

opened the display would read “MAIN dOOR” with no audio indication and the dryer will shut down.

Once the main door has closed the display would read “PRESS START” press the “ENTER/START”

key and it will continue the programmed cycle.

9. LINT dOOR- This monitors the lint drawer and door circuit. If the machine was not active and the lint

drawer and door was opened the display would read “REAdY.” If a program attempt was made with the

lint drawer and door open the display would read “LINT dOOR” with an audio indication. If the machine

is active and the lint drawer and door was opened the display would read “LINT dOOR” with no audio

indication and the dryer will shut down. Once the lint door was closed the display would read “PRESS

START” press the “ENTER/START” key and it will continue the programmed cycle.

10. TEMP SENSOR FAIL CHECK TEMP SENSOR FUSE- This routine monitors the tumbler

temperature. When the temperature sensor or fuse opens with the machine not active the display will

read “TEMP SENSOR FAIL CHECK TEMP SENSOR FUSE” with an audio indication. If the machine

was active at the time that the temperature sensor or fuse opened the display would read “TEMP SENSOR

FAIL CHECK TEMP SENSOR FUSE.” If the tumbler temperature is above 100º F (38º C) the machine

will continue to display “TEMPSENSOR FAILCHECK TEMP SENSOR FUSE” with an audio indication

and run with no heat for three (3) minutes or until the temperature drops below 100º F (38º C). If the

tumbler temperature is below 100º F (38º C) upon failure the machine will shut down and display “TEMP

SENSOR FAIL CHECK TEMP SENSOR FUSE” with an audio indication. The display will continue to

read “TEMP SENSOR FAIL CHECK TEMP SENSOR FUSE” an audio indication will sound for

approximately 5 seconds, every 30 seconds until the problem is corrected or the power to the dryer is

disconnected (and the problem is corrected).

NOTE: Once the Phase 6 microprocessor controller (computer) detects a problem in the heat circuit, it

updates every 30 seconds, so that if the problem was a loose connection in the circuit which

corrected itself, the “TEMPSENSOR FAILCHECK TEMPSENSOR FUSE” condition

would automatically be cancelled and the display will return to “REAdY.”

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11. ROTATE SENSOR FAIL- Indicates a rotational sensor circuit failure meaning that there is a fault

somewhere in the tumbler (basket) rotating circuit, or the Phase 6 OPL microprocessor controller

(computer) program related to this circuit (program location 2) is set incorrectly. In the active mode

it should be (ROTATE SENSOR ACTIVE), if the dryer is not equipped with the optional rotational

sensor it should be set in the nonactive mode (No ROTATE SENSOR).

NOTE: RPM- This routine monitors the timing response from the existing rotational sensor input and

derives a RPM measurement. To display this RPM measurement (press the “ENTER/START”

key once and release, then press the “ENTER/START” key a second time and hold. This will

display the RPM measurement). The rotational sensor must be active for operation of this

feature.

12. CHECK MAIN FUSE- Indicates that the circuit fuse protection which is located on the back side

of the Phase 6 microprocessor controller (computer) the display would read “CHECK MAIN FUSE.”

If the display continues after the fuse has been replaced then it is the fault of the Phase 6 microprocessor

controller (computer).

B. L.E.D. (LIGHT EMITTING DIODE) DISPLAY INDICATORS

The L.E.D. (light emitting diode) indicator dots located on the top portion of the display indicates various Phase 6

OPL computer output functions while a cycle is in progress. These indicator dots (as shown in the illustration

below) DO NOT necessarily mean that the outputs are functioning. They are only indicating that the function

output should be active (on).

1. L.E.D. DISPLAY INDICATOR NUMBER 1

a. For Optional Reversing Models:

1) This indicator dot is on when the drive tumbler (basket) motor is operating in the forward mode

(clockwise [CW] direction).

2. L.E.D. DISPLAY INDICATOR NUMBER 2

a. For Optional Reversing Models:

1) This indicator dot is on when the drive (basket [tumbler]) motor is operating in the reverse mode

(counterclockwise [CCW] direction).

3. L.E.D. DISPLAY INDICATOR NUMBER 3

a. Heat Circuit Indicator:

1) This indicator dot is on whenever the Phase 6 OPL microprocessor controller (computer) is

calling for the heating circuit to be active (on).

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4. L.E.D. DISPLAY INDICATOR NUMBER 4

a. On Indicator:

1) This indicator dot is on whenever a cycle is in progress. Additionally, when the Anti-Wrinkle

program is active, the indicator dot will be on whenever the Phase 6 OPL microprocessor controller

(computer) is in the Guard On Time program.

5. L.E.D. DISPLAY INDICATOR NUMBER 5

a. Air Jet Circuit - OPTIONAL

1) This indicator dot is on at the end of the dryer cycle for approximately 60 seconds.

C. PHASE 6 OPL MICROPROCESSOR CONTROLLER (COMPUTER) RELAY

OUTPUT L.E.D. (LIGHT EMITTING DIODE) INDICATORS

There are a series of five (5) L.E.D. (light emitting diode) indicators (ORANGE LIGHTS) located at the backside

of the Phase 6 OPL microprocessor controller (computer). These are identified or labeled (from top to bottom in

the illustration below as: FAN-BLOWER, FOR-FORWARD, REV-REVERSE, AIR-AIR-JET, HT1-HEAT

OUTPUT. There are a series of seven [7] L.E.D. (light emitting diode) indicators [red lights] FUSE-MAIN

FUSE, LINT-LINT DOOR, MAIN-MAIN DOOR, DRUM-TUMBLER HI-LIMIT, SAIL-SAIL SWITCH,

BURN-BURNER HI LIMIT, FLAME-FLAME PROBE). The L.E.D. (light emitting diode) in the center of the

board (red light) indicates power supplied to the Phase 6 OPL microprocessor controller (computer). These

L.E.D.’s (light emitting diode) indicate the inputs and outputs of the Phase 6 OPL microprocessor (computer) as

it monitors the safety circuits.

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1. “FAN” (BLOWER) Output L.E.D. (light emitting diode) Indicator

a. If the dryer is started and the blower motor is not operating, yet the Phase 6 OPL microprocessor

controller (computer) display fan indicator dot and power supply input L.E.D. (light emitting diode)

are on, but the fan output L.E.D. is off, then the fault is the Phase 6 OPL microprocessor controller

(computer) itself.

1) If the motor is not operating. The fan indicator dot and output L.E.D. (light emitting diode) are

also on, then the problem (fault) is elsewhere (i.e., external of the Phase 6 OPL microprocessor

controller [computer]).

2. “FOR” (FORWARD) Output L.E.D. (light emitting diode) Indicator (for optional reversing

model ONLY)

a. If the dryer is started and the blower motor is operating, but the drive (tumbler/basket) motor is not,

yet the Phase 6 OPL microprocessor controller (computer) display “FORWARD” indicator dot is on,

the “FOR” (FORWARD) motor output L.E.D. (light emitting diode) is off; then the fault is the Phase

6 OPL microprocessor controller (computer) itself.

1) If the drive tumbler (basket) motor is not operating and the forward indicator dot and output

L.E.D. (light emitting diode) is on; then the problem (fault) is elsewhere (i.e., external of the

Phase 6 OPL microprocessor controller [computer]).

3. “REV” (REVERSE) Output L.E.D. (light emitting diode) Indicator (for optional reversing

models ONLY)

a. If the dryer is started and the blower motor is operating but the drive (tumbler and basket) motor is

not, yet the Phase 6 OPL microprocessor controller (computer) displays “REVERSE” indicator dot is

on but the “REV” (REVERSE) motor output L.E.D. (light emitting diode) is off; then the fault is of

the Phase 6 OPL microprocessor controller (computer) itself.

1) If the drive tumbler (basket) motor is not operating and reverse indicator dot and output L.E.D.

(light emitting diode) is on; then the problem (fault) is elsewhere (i.e., external of the Phase 6 OPL

microprocessor controller [computer]).

4. “AIR” (AIR JET) Output L.E.D. (light emitting diode) Indicator - OPTIONAL

a. “AIR” is on with the display dot at the end of the dry cycle once the display reads “dONE,” it is on for

approximately 60-seconds and the output L.E.D. (light emitting diode) indicator and the display dot go

out. If the air jet DOES NOT energize it is not the fault of the Phase 6 OPL microprocessor

controller (computer). If the output L.E.D. (light emitting diode) or dot DO NOT go on it is the fault

of the Phase 6 OPL microprocessor controller (computer).

5. “HT1” (HEAT) Output L.E.D. (light emitting diode) Indicator

a. If the dryer is started and there is “No Heat” yet the Phase 6 OPL microprocessor controller (computer)

display heat circuit indicator dot is on, but the “HT1” output L.E.D. (light emitting diode) indicator is

off; then the fault is in the Phase 6 OPL microprocessor controller (computer) itself.

1) If the dryer is started and there is “No Heat” yet both the Phase 6 OPL microprocessor controller

(computer) display indicator dots and the “HT1” output L.E.D. (light emitting diode) indicator are

on; then the problem (fault) is elsewhere (i.e., external of the Phase 6 OPL microprocessor

controller [computer]).

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6. “FUSE” (MAIN FUSE) Input L.E.D. (light emitting diode) Indicator

a. Should be on ALL the time (even if the dryer is not running). If the L.E.D. (light emitting diode) is

not on; then the display will read “CHECK MAIN FUSE.” If the main fuse is good then the fault is

on the Phase 6 microprocessor controller (computer).

7. “LINT” (LINT DOOR) Input L.E.D. (light emitting diode) Indicator

a. Should be on ALL the time (unless the lint door is opened then the “LINT” L.E.D. [light emitting

diode] indicator will go out).

b. If the dryer is active (running) and the lint door is opened the “LINT” L.E.D. (light emitting diode)

indicator will go out and the display will read “LINT dOOR.” The dryer will stop until the Lint

Drawer has been closed, at which time the L.E.D. (light emitting diode) display will read “PRESS

START.” At this time, to resume the drying cycle press “ENTER/START” key.

8. “MAIN” (MAIN DOOR) Input L.E.D. (light emitting diode) Indicator

a. Should be on ALL the time (unless the lint door is open or the main door is opened then the “MAIN”

L.E.D. [light emitting diode] indicator will go out).

b. If the dryer is active (running) and the main door is opened the “MAIN” L.E.D. (light emitting diode)

indicator will go out and the display will read “MAIN dOOR.” The dryer will stop until the main door

has been closed, at which time the L.E.D. (light emitting diode) display will read “PRESS START.”

At this time, to resume the drying cycle press “ENTER/START” key.

9. “DRUM” (TUMBLER [BASKET] HI-LIMIT) Input L.E.D. (light emitting diode) Indicator

a. Should be on at ALL times (unless the tumbler [basket] hi-limit switch opens prior during the cycle

while the heat was on the display would read “dRUM Safety FAIL”). The machine will run with no

heat for three (3) minutes or until the temperature drops below 100º F (38º C). Then the machine will

shut down still displaying “dRUM SAFETYFAIL” with an audio indication.

10. “SAIL” (SAIL SWITCH) Input L.E.D. (light emitting diode) Indicator

a. This routine will prevent start up on the machine unless the sail switch is in the correct position. If the

sail switch is in the closed position prior to start, the “SAIL” output L.E.D. (light emitting diode)

indicator will be off, the machine will not start and the display will read “SAIL SWITCH FAIL” along

with an audio indication.

b. If the sail switch opens during the cycle the “SAIL” output L.E.D. (light emitting diode) will go out

and the display will read “NOAIRFLOW.” The machine will run with no heat for three (3) minutes

or until the temperature drops below 100º F (38º C). Then the machine will shut down still displaying

“NO AIRFLOW” along with an audio indication.

11. “BURN” (BURN HI-LIMIT) Input L.E.D. (light emitting diode) Indicator

a. This routine monitors the temperature of the burner. If the burner hi-limit opens during the cycle

while the heat was on the “BURN” output L.E.D. (light emitting diode) indicator goes out and the

display reads “bURNER SAFETY FAIL.” The machine will run with no heat for three (3) minutes

or until the temperature drops below 100º F (38º C) then the machine will shut down still displaying

“bURNER SAFETY FAIL” with an audio indication.

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12. “FLAME” (bURNER CONTROLFAIL) Input L.E.D. (light emitting diode) Indicator

a. This routine monitors the ignition control’s gas valve output response. If the valve output signal is not

present from the ignition control within the valve time limits the microprocessor determines the

ignition control has failed. If this occurs when the cycle is active the “FLAME” output L.E.D. (light

emitting diode) indicator will go out and the display will read “bURNER CONTROL FAIL.” The

machine will run with no heat for three (3) minutes or until the temp drops below 100º F (38º C).

Then the machine will shut down still displaying “bURNER CONTROLFAIL” with an audio indication.

13. “POWER SUPPLY” Input L.E.D. (light emitting diode) Indicator

a. Should be on at ALL times (even if the dryer is not running). The power supply L.E.D. (light

emitting diode) output indicator will not be on if the power supply fuse to the Phase 6 OPL

microprocessor is not present. If the power supply fuse is faulty the L.E.D. (light emitting diode)

output will be off and there will be no display or keypad (touchpad) function. The “FUSE,” “LINT,”

and “DRUM” output L.E.D. (light emitting diode) indicators will remain on.

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D. L.E.D. CODES

1. Display Codes

SLOPE FACTOR

ALL REV

ALWAYS REVERSING

ANTI WRINKL dELAY TIME

ANTI WRINKLGUARdACTIVE

ANTI WRINKL GUARd ON TIME

AUTO CYCLE

ANTI-WRINKLE DELAY TIME

ANTI-WRINKLE PROGRAMACTIVE

ANTI-WRINKLE GUARD ON TIME

AUTOMATIC MODE

HEAT LOSS (OFF SET) FACTOR

GAS ONLYPOWER (24 VAC) IS NOT EVIDENTAT GAS VALVE

NO BURNER FLAME SENSED

GAS/ELECTRIC ONLYBURNER/OVEN OPEN HI-LIMIT CIRCUIT

BUZZER (TONE)

bURNER CONTROL FAIL

bURNER FLAME FAIL

bURNER SAFETY FAIL

bUZZ

bUZZ TIME

CEL

BUZ TIME

DEGREE IN CELSIUS

CHECK MAIN FUSE

CLEAN LINT

COOL

COOL TIME_M

COOL TEMP_

CYCLEA

MAIN FUSE FAILURE

PROMPT TO CLEAN LINT SCREEN, DRYER CYCLE LOCKOUT

COOL DOWN CYCLE IN PROGRESS

COOL DOWN TIME

COOL DOWN TEMPERATURE

PREPROGRAMMED CYCLEA

CYCLEb

PREPROGRAMMED CYCLE B

CYCLEC

PREPROGRAMMED CYCLE C

CYCLED

PREPROGRAMMED CYCLE D

CYCLEE

PREPROGRAMMED CYCLE E

CYCLEF

PREPROGRAMMED CYCLE F

dONE

dRYING

DRYING or COOLING CYCLE COMPLETE OR DRYER INANTI-WRINKLE MODE

DRYINGCYCLEINPROGRESS

dRYLEVEL_

dRY TEMP F_

dRY TIME_M

dRUM SAFETY FAIL

ELAPSE TIME_MIN

ELECTRIC

DRYNESS LEVEL(PERCENTAGE OF EXTRACTION) (NUMERICALVALUE)

DRYINGTEMPERATURE

LENGTHOFDRYINGCYCLE

TUMBLER HI-LIMIT CIRCUIT IS OPEN

CYCLE DISPLAY TIME

SPECIFIC HEAT TYPE OR DRYER ELECTRICALLY HEATED

FABRIC TEMPERATURE

FAR

DEGREE IN FAHRENHEIT

FLASH

FLASHDISPLAYACTIVE

GAS

HOT

SPECIFIC HEATTYPE OF DRYER GAS HEATED

INDICATESAN OVERHEAT CONDITION

LINT DRAWER/DOOR CIRCUIT IS OPEN OR FAULT IN THE A.C. SWITCH CIRCUIT

DRYING CYCLES RANGE FROM 1-10 CYCLES BEFORE CLEAN LINT DISPLAY

CYCLE DISPLAY TIME

DOOR CIRCUIT IS OPEN OR FAULT IN THE A.C. DOOR SWITCH CIRCUIT

MANUAL MODE

MAXIMUM GUARD TIME

LINT dOOR

LINT COUNT

_M REMAIN

MAIN dOOR

MANUAL CYCLE

MAXANTI WRINKL GUARd

NFLASH

FLASH DISPLAY NOTACTIVE

NoAIRFLOW

NoANTI WRINKL GUARd

NoBUZZ

SAIL SWITCH OPEN

ANTI-WRINKLE PROGRAM IS NOTACTIVE

NO BUZZER (TONE)

NoHEAT

NoREV

GAS ONLY IGNITION ATTEMPT FAILURE

NO REVERSE

No ROTATE SENSOR

PROGRAM

NO ROTATIONALSENSOR SELECTED

PROGRAM MODE

REAdY

NO CYCLE IN PROGRESS

ROTATE SENSORACTIVE

ROTATE SENSOR FAIL

_RPM

ROTATIONALSENSOR SELECTED

ROTATIONAL SENSOR CIRCUIT FAILURE

MONITORS TUMBLER RPM WITH ROTATIONAL SENSOR CIRCUIT ACTIVE

GAS/ELECTRIC ONLY ATTEMPT MADE TO START DRYER WITH SAIL

SWITCH DISABLED IN CLOSED POSITION

SELECT REVERSE

SAILSWITCH FAIL

SELREV

SPIN TIME

START GUARd

STEAM

STOP TIME

STARTANTI-WRINKLE GUARD CYCLE

SPECIFIC HEAT TYPE OR DRYER STEAM HEATED

STOP TIME

TEMPSENSOR FAIL CHECK

TEMP SENSOR FUSE

FAULT IN M.P. HEAT SENSING CIRCUIT

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2. Fault Codes

bURNER CONTROL FAIL

- GAS MODELS ONLY POWER (24 VAC) IS NOT EVIDENT AT GAS VALVE

bURNER FLAME FAIL

- The Phase 6 Microprocessor Controller (Computer) DOES NOT SENSE

FLAME VERIFICATION (GAS MODEL ONLY)

bURNER SAFETY FAIL

- GAS/ELECTRIC ONLY BURNER/OVEN OPEN HI-LIMIT CIRCUIT

dRUM SAFETY FAIL

- Fault in the TUMBLER HI-LIMIT CIRCUIT

HOT

- Indicates an OVERHEAT CONDITION

LINT dOOR

- When the LINT DOOR OR DRAWER is open or there is a fault in the LINT

DOOR/DRAWER CIRCUIT

MAIN dOOR

- When the MAIN DOOR is open or there is a fault in the DOOR CIRCUIT

No AIRFLOW

- Fault in the SAIL SWITCH CIRCUIT (GAS/ELECTRIC MODELS ONLY)

No HEAT

- GAS ONLY IGNITION ATTEMPT FAILURE

ROTATE SENSOR FAIL

- Fault in the ROTATION SENSOR CIRCUIT

SAIL SWITCH FAIL

- Fault in the SAIL SWITCH CIRCUIT (GAS/ELECTRIC MODELS ONLY)

TEMP SENSOR CHECK TEMP SENSOR FUSE

- Fault in the MICROPROCESSOR TEMPERATURE SENSOR CIRCUIT

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E. COMPUTER LOGIC and WIRING DIAGRAM

1. Operator enters desired selections.

2. Information entered is sent to the microprocessor via the keyboard (touchpad).

3. The input information is sorted, processed and executed by the microcomputer chip.

4. The microcomputer output signal activates the contactors and HSI (Hot Surface Ignition) module which

control machine functions.

NOTE: When contacting ADC with electrical questions, please have on hand the correct wiring

diagram number for your particular machine. This number is located on the top right-hand

corner of the diagram. It is a six (6) digit number followed by a letter to distinguish the revision

dates (refer to illustration).

The wiring diagrams used in troubleshooting are specifically for dryers manufactured at the time of publishing.

Your particular model may vary slightly depending on the date of manufacturing and options available. The

correct wiring diagram and number is either taped to the rear of the control door or each dryer, or placed in the

control box. If your particular diagram is lost or unreadable, call ADC with the serial number of the dryer. ADC

will be more than happy to send you a diagram by fax or mail.

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1. No Display Condition

a. Check position of “EMERGENCY STOP” (E-Stop) to verify it is in operating position (pull or twist for

operating position).

b. Check fuse one or two and if either are blown, replace.

c. Take voltage reading across the microprocessor (J7) 9-pin connector pins 1 and 2. If no voltage is present

at pins 1 and 2, double check the secondary (24 VAC) side of transformer at the blower motor contactor

number 13 to ground if no voltage is present check primary voltage to transformer.

d. Check voltage across fuses 1 and 2 to ground. If voltage is present, check “EMERGENCY STOP”

(E-Stop) “red” and “black” wire to ground. If voltage is present, check voltage across 95 and 96 to

ground of the drive motor overload. If voltage is present, check 95 and 96 to ground of the blower motor

overload. If voltage is present and transformer terminations are good, then the transformer is faulty.

Refer to the schematic supplied with the dryer to assist in the troubleshooting of the dryer.

NOTE: In this next section ALL voltage checks must be done in the operating mode with the

appropriate microprocessor dot on. Also appropriate L.E.D. (light emitting diode) output light

on.

NOTE: In this next section when checking for voltage you are looking for 25AC volts unless otherwise

specified.

2. Drive motor reverses but DOES NOT forward, blower motor runs

a. If computer dot (first dot on the left) does not come on replace the computer.

b. Check for voltage across the coil of the forward contactor located in the reversing panel box. The

contactor according to your diagram is marked CR2. The coil markings A1 and A2.

If voltage is present, replace reversing contactor.

If voltage is not present, there is a faulty wire or termination between BS2 and contactor coil (CR2).

c. If there is voltage across the two AS2 terminals and no voltage across the two BS2 terminals, replace the

arc suppressor (A.S.) board.

If there is no voltage across the two AS2 terminals on the arc suppressor (A.S.) board, the problem is a

faulty wire or termination between the AS2 board and the J7 9-pin computer connector no. 8 or faulty

computer.

3. Drive motor works in forward mode but DOES NOT reverse, blower motor runs

a. If computer dot (second one from left) does not come on, check program to see if set for reverse.

b. If set for reverse, replace computer.

c. Check for voltage across the coil of the reversing contactor located in the rear panel box. The contactor

according to your diagram is CR3, also the markings on the coil are A1 and A2.

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If there is voltage, replace the coil or the complete contactor.

If there is no voltage, check for voltage across the two BS3 terminals on the arc suppressor (A.S.) board.

If there is voltage across the two BS3 terminals and no voltage across the coil of the reversing contactor

(A1 and A2), the problem is faulty wires or terminations between BS1 and the contactor coil.

d. If there is no voltage between the two BS3 terminals on the arc suppressor (A.S.) board, check for

voltage across the two AS3 terminals on the board.

If there is voltage across the two AS3 terminals and no voltage across the two BS3 terminals, replace the

arc suppressor (A.S.) board.

If there is no voltage across the two AS3 terminals, the problem is faulty wires or terminations between

the arc suppressor (A.S.) board and the computer 9-pin connector no. 9 or a faulty computer.

4. Blower motor DOES NOT operate, drive motor runs

a. Check for voltage across terminalsA1 andA2 of the impellor contactor. This is the single contactor in the

reversing control box.

If voltage is present check for voltage across the blower motor. If there is voltage at the blower motor

replace the motor.

If there is no voltage at the blower motor, the problem is faulty wires or terminations between the contactor

and the motor.

b. If there is no voltage present at A1 and A2 of the contactor, check for voltage across the two BS1

terminals of the arc suppressor (A.S.) board.

If there is voltage present at the two BS1 terminals, the problem is faulty wires or terminations between

the two BS1 terminals and the coil (A1 and A2) terminals.

If there is no voltage across the two BS1 terminals, check for voltage across the two AS1 terminals.

If there is voltage across the two AS1 terminals and there is no voltage between the two BS1 terminals,

replace the arc suppressor (A.S.) board.

c. If there is no voltage across the two AS1 terminals, the problem is faulty wires or terminations between

the two AS1 terminals and the computer board J7 9-pin connector no. 7 or faulty computer.

5. Lint Door Condition

NOTE: Make sure main door and lint door are closed. Also, if checking either switch, the plunger

must be depressed.

a. Check L.E.D. (light emitting diode) input light “LINT” on the component side of the computer. If the light

is on, replace the computer.

b. Check voltage (24 VAC) from J7 9-pin connector no. 3 to ground. If voltage is present check no. 4 to

ground if voltage is present replace board.

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c. If no voltage is present at J7 9-pin connector no. 4 to ground, but voltage is present at no. 3 to ground. The

problem is a faulty switch, wires or termination between J7 to J8 and J8 to the lint switch no. 20 and 21.

d. If no voltage is present at J7 9-pin connector no. 3 to ground, then voltage should not be present at no.

5 to ground. Replace the board.

6. Main Door Condition

NOTE: Make sure main door and lint door are closed. Also, if checking either switch, the plunger

must be depressed.

a. Check L.E.D. (light emitting diode) input light “MAIN” on the component side of the computer. If the

light is on, replace the computer.

b. Check voltage (24 VAC) from J7 9-pin connector no. 5 to ground. If voltage is present, check no. 6 to

ground. If voltage is present, replace board.

c. If no voltage is present at J7 9-pin connector no. 6 to ground, but voltage is present at no. 5 to ground. The

problem is a faulty switch, faulty wires or terminations J7 to J8. J8 to J5 and J5 to main door switch no.

31 and no. 32.

7. “No Heat” drive and blower motors run, display reads normal (gas models).

a. Check L.E.D. (light emitting diode) input light “HT1” on the component side of the computer. If the light

is on replace the board.

b. If the L.E.D. (light emitting diode) input light “HT1” on the component side of the computer is on and

there is no voltage to the HSI (Hot Surface Ignition) module “w” the display will read “BURNER CONTROL

FAIL.” The problem is faulty wires or terminations between microprocessor and HSI (Hot Surface

Ignition) module.

c. If voltage is present on the HSI (Hot Surface Ignition) module “w” to ground. Check voltage at the gas

valve if voltage is present across the two “yellow” wires at the gas valve and the gas supply is on then the

fault is that of the gas valve.

8. Microprocessor (Computer)

a. Replace the temperature sensor underneath the tumbler (basket) on a bracket (the bullet shaped device).

b. If it still reads “TEMP SENSOR FAIL CHECK TEMP SENSOR FUSE,” unplug J3 4-pin connector from

the temperature sensor bracket. Also, unplug the microprocessor J14 4-pin connector from the computer

board. Take a continuity reading from J14 no. 1 to J3 no. 1, then from J14 no. 2 to J3 no. 2.

If there is no continuity, check for break in wire, a short to the ground, loose terminations, or even replace

the wire.

If there is continuity, computer board is faulty.

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IMPORTANT

MANUAL RESET HI-LIMIT INSTRUCTIONS

FOR PHASE 6 MODELS

This dryer was manufactured with a manual reset burner hi-limit and tumbler/lint chamber hi-limit thermostat

which is monitored by the Phase 6 computer. If either manual reset thermostat is open prior to start of the drying

cycle, the dryer will start momentarily and then shut down, the Phase 6 computer will display an error code with

an audio indication. If the tumbler/lint chamber hi-limit thermostat is open, the display will read “dRUM SAFETY

FAIL.” If the burner hi-limit thermostat is open, the display will read “bURNER SAFETY FAIL.”

If either manual reset hi-limit thermostat opens during a drying cycle, the display will show the applicable error

code described above along with an audio indication. If the drum temperature is above 100º F (38º C), the dryer

will continue to run with no heat for three (3) minutes or until the drum temperature has flattened below 100º F

(38º C). The clear/stop button on the Phase 6 keypad (touchpad) must be pressed to clear the error condition.

The open manual reset hi-limit thermostat must be reset “manually” prior to the start of the next cycle.

This hi-temperature condition may be caused due to a restricted exhaust, poor airflow or improper burner operation.

The location of the burner hi-limit is on the right side of the burner box and the tumbler hi-limit is located in the lint

chamber area.

WARNING: Discontinue power to dryer before attempting to reset hi-limit.

IMPORTANT

This dryer is equipped with a burner

hi-limit and tumbler/lint chamber hi-limit

thermostat which must be reset manually.

WARNING: Discontinue power to dryer

before attempting to reset hi-limit.

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SECTION VIII

TECHNICAL INFORMATION

The following section contains various technical information important to the service person in servicing and

maintaining the dryer.

A. MOTOR PLATE (HIGH and LOW VOLTAGE)

The motor plate is located on the side of the drive motor (refer to illustration) and contains a graphical representation

of the motor wiring for both low and high voltage ratings.

Removing the cap reveals the wiring to the motor. On each wire there is a number which corresponds to the

numbers on the motor plate. Depending on whether the dryer is operating on low or high voltage, the wiring

should match the motor plate as follows:

The dots and lines represent connections (refer to illustration).

For example:

On low voltage - wire no. 14 is connected to wire no. 4

- wire no. 1 is connected to wire no. 7, which in turn are both connected to L1

On high voltage - wire no. 14 is insulated or capped

- wire no. 4 is connected to wire no. 7

- wire no. 1 is connected to L1

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B. DATA LABEL

Contacting American Dryer Corporation (ADC)

When contacting ADC, certain information is required to ensure proper service and parts information. This

information is on the data label, located on the top right corner of the dryer, viewed from the rear (refer to

illustration). When contacting ADC, please have the model number and serial number readily accessible.

Information on the Data Label

a. Model number - The model number is an ADC number which describes the size of the dryer and the type

of heat (gas or steam).

b. Serial number - The serial number allows ADC to gather information on your particular dryer.

c. Manufacturing code number - The manufacturing code number is a number issued by ADC which describes

ALL possible options on your particular model.

d. Type of heat - Describes the type of heat; gas (natural or L.P.), steam or electric.

e. Heat input - (For gas dryers) describes the heat input in British Thermal Units.

f. Electric service - Describes the electric service for your particular models.

g. Gas manifold pressure - Describe the manifold pressure as taken at the gas valve pressure tap (refer to

“Using a Manometer”).

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C. HOW TO USE A MANOMETER

1. With dryer in nonoperating mode, remove plug on the gas valve pressure tap.

2. Attach plastic tubing to pressure tap. Fitting is supplied with manometer (see illustration).

3. Attach manometer to dryer using magnet.

NOTE: Place manometer in a position so that readings can be taken at eye level.

4. Fill manometer with water, as shown in illustration to the zero level.

5. Start dryer. With burner on, take a reading.

a. Read water level at the inner tube. Readings

should be taken at eye level.

b. Correct readings should be:

NATURAL GAS: 3.5 inches W.C. - 8.7

mb .

L.P. GAS: 10.5 inches W.C. - 26.1 mb.

6. If water column pressure is incorrect refer to

“TO ADJUST GAS PRESSURE.”

7. Reverse procedure for removing manometer.

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D. ML-96 TOOL LIST

Straight Head Screwdriver

Phillips Head Screwdriver

Sensor Pin and Socket Tool (P/N 122801)

Pliers

1/4” Nut Driver

3/8” Open End Wrench

5/8” Open End Wrench

3/8” Socket Wrench

1/2” Socket or Open End Wrench

1/4” Open End Wrench

5/16” Socket or Open Wrench

1/2” Socket Wrench

7/16” Socket or Open End Wrench

5/16” Nut Driver

12” Pipe Wrench (2)

1/8” “T” Shaped or “L” Shaped Allen Wrench

3/16” “T” Shaped or “L” Shaped Allen Wrench

Wire Cutters

1/2” Allen Wrench

3/8” Allen Wrench

Channel Locks

Manometer (ADC P/N 122804)

MP Pin Extraction Tool (ADC P/N 122800)

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ADC450406

1- 02/09/00-25

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