CDS-2
CDS-3
DISCONTINUED VERSION
The information in this manual
is no longer current.
OPERATING & SERVICE MANUAL
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
and the quickest way to obtain the catalog. Contact Bunn-O-Matic Corporation at 1-800-286-6070 to obtain a paper
copy of the required Illustrated Parts Catalog mailed via U.S. Postal Service.
27646.0000N 04/08 ©1997 Bunn-O-Matic Corporation
USER NOTICES
Carefully read and follow all notices on the equipment and in this manual. They were written for your protec-
tion. All notices are to be kept in good condition. Replace any unreadable or damaged labels.
WARNING
CHARGE
Type R22, Amount 8.4 oz
HAZARDOUS
VOLTAGE
Design Pressures: High 210 Low 32
DISCONNECT FROM
POWER SOURCE
BEFORE REMOVING!
27444.0000
12559.0003
CAUTION
Instructional video that accompanies every
machine should be viewed before using
28720.0000
00986.0002
27443.0000
27646 120601
3
USER NOTICES (CONT.)
AFTER CLEANING &
BEFORE REASSEMBLY
CHARGE
1. Apply lubricant* on lip of auger seal where
contact is made with cooling drum.
2. Apply lubricant* on outside surface of
cooling drum seal or inside bore of hopper.
3. Apply lubricant* over o-rings on faucet spool
before inserting into faucet housing.
* Refer to product literature for Bunn
approved lubricant.
Type R22, Amount 8.4 oz
Design Pressures: High 210 Low 32
27444.0000 (CDS-2 Only)
2
1
Type R404A, Amount 9.5 oz (269 gm)
Design Pressures:
High 215 psi (15 bar) (1.48 MPa)
Low 40 psi (3 bar) (0.28 MPa)
29373.00000 (CDSA-2 Only)
3
LUBRICATION
CHARGE
27664.0000D 5/97 © 1996 BUNN-O-MATIC CORPORATION
Type R404A, Amount 25 oz
Design Pressures: High 320 Low 44
27664.0000
28519.0000 (CDS-3 Prior to S/N CDS0019500)
CHARGE
Type R404A, Amount 22 oz
Design Pressures: High 380 Low 52
29424.0000 (CDS-3 S/N CDS0019500 - UP)
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4
SITE PREPARATION
These dispensers are very heavy. Place them on a sturdy counter or shelf capable of supporting at least 180
lbs for the CDS2 and 250 lbs for the CDS3. They are for indoor use only.
The dispenser must have at least four inches of space behind it. This space is needed for airflow, air filter
removal, and cleaning. Minimal clearance is required between the dispenser sides and the wall or another appli-
ance. The dispenser performs better if not placed near any heating appliance. Leave some space so the dispenser
can be moved for cleaning.
ELECTRICAL REQUIREMENTS
CAUTION – Improper electrical installation will damage components. An electrician must provide electrical
service as specified below.
Model CDS-2, This dispenser has an attached cordset and requires a 2-wire, grounded, individual branch
circuit rated 120 volts ac, 15 amp, single phase, 60 Hz. The mating connector must be a NEMA 5-15R. (Refer
to the dataplate for exact electrical requirements.)
Model CDSA-2, This dispenser has an attached cordset and requires a 2-wire, grounded, individual branch
circuit rated 230 volts ac, 10 amp, single phase, 50 Hz. The mating connector must be a NEMA 5-15R. (Refer
to the dataplate for exact electrical requirements.)
Model CDS-3, This dispenser has an attached cordset and requires a 2-wire, grounded, individual branch
circuit rated 120 volts ac, 20 amp, single phase, 60 Hz. The mating connector must be a NEMA 5-20R. (Refer
to the dataplate for exact electrical requirements.)
Model CDSA-3, This dispenser has an attached cordset and requires a 2-wire, grounded, individual branch
circuit rated 230 volts ac, 15 amp, single phase, 50 Hz. The mating connector must be a NEMA 5-20R. (Refer
to the dataplate for exact electrical requirements.)
NOTE – Bunn-O-Matic does not recommend the use of any extension cord with these dispensers.
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5
INITIAL SETUP
CAUTION – The dispenser is very heavy! Use care when lifting or moving it. Use at least two people to lift or
move the dispenser.
1. Set the dispenser on the counter where it will be used. The CDS-3 dispenser requires a minimum of 6.0”
air clearance on both sides and at the rear of the dispenser. For optimum performance, do not let warm air
from surrounding machines blow on the CDS-3 and DO NOT REMOVE VINYL DEFLECTOR.
NOTE – The dispenser should be level or slightly lower in front for proper operation.
6.0"
MIN.
6.0"
6.0"
MIN.
MIN.
Vinyl Deflector
DO NOT REMOVE
2. Remove all shipping material, including the compressor support eye-bolts, the cooling drum supports, the
“Do Not Lift Here” signs from the cooling drums, and the “Rinse Before Using” signs from each hopper.
NOTE – Use BOM M2550.0000 lubricant where specified.
5. Install the seal over the flange
at the rear of each cooling drum
as shown.
3. Squeeze some lubricant into 4. Apply a thin film of lubricant to
hand.
each cooling drum seal.
7. Apply a thin film of lubricant to 8. Install the seals on the auger
6. Press the seals firmly into
the inside of each auger shaft
seal.
shafts. Wipe the cooling drums
to remove any lubricant.
place.
27646 022500
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INITIAL SETUP (CONT.)
10. Thoroughly rinse the hoppers
and install them over the cool-
ing drums with augers. Slide
them into place and push them
down as far as they will go.
As much as possible, keep
lubricant from the inside of the
hoppers. The cleaner you keep
the food zone, the cleaner the
product you’ll serve the cus-
tomer.
9. Align the auger shaft with the
flat fin of the auger. Push the
augers as far as they will go
and rotate them so the flat fins
are pointing up.
11. Set the lids on the hoppers.
Slide front-to-back or lift off for
filling.
APPROXIMATELY .25"
12. Plug in the hopper lid lamp 13. (CDS-2 only) Assemble the drip 14. (CDS-3 only) Loosen the two
cables.
tray.
front legs by turning coun-
terclockwise to gain approxi-
mately .25” clearance. Install
the slots of the support bracket
over threaded studs of the legs
as shown in illustration. Tighten
the legs by turning clockwise to
secure the bracket in place.
15. (CDS-3 only) Install the drip
tray.
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7
OPERATING CONTROLS
(CDS-3 Controls Illustrated)
ICE CONTROLS
ICE/OFF/NO-ICE SWITCHES
Controls the consistency of the ice in the hoppers
ICE – This is the normal operating position. Freezes
when the DAY/NIGHT switch is in the left “DAY” and maintains the ice in the selected hopper to the
position and the ICE/OFF/NO-ICE switch is in the left
“ICE” position.
consistency set with the ICE control(s) when in the left
“ICE” position.
Turn this control clockwise to produce a
coarser ice or counterclockwise to produce
a finer ice. (The dispenser is set to deliver
satisfactory ice at a 1:00 setting.)
OFF – Provides no cooling to the selected hop-
per when in the center “OFF” position.
NO-ICE – Maintains cooling yet allows any ice
in the selected hopper to naturally thaw when
in the right “NO-ICE” position.
AUGER SWITCHES
”—” – This is the normal operating posi-
tion. Energizes the auger motor when in
the right position. The dispenser will cool
to the ice consistency or liquid temperature
presets only with the switch in the right
position.
DAY/NIGHT SWITCH
DAY – This is the normal operating position.
The hoppers’ display lights will glow and the
electronic controls will maintain ice when the
switch is in the left “DAY” position, the indi-
vidual hoppers’ ICE/OFF/NO-ICE switches are
in the left “ICE” position, and the individual
hoppers’ AUGER switches are in the right “—”
position.
“o” – Removes power from the auger mo-
tor when in the left position.
NIGHT – Use this position at night. The hop-
pers’ display lights will be out yet the liquid
will be kept cold in all hoppers when this switch is in the
right “NIGHT” position and the AUGER switches are in
the right “—”position.
POWER OFF/ON SWITCH
ON – This is the normal operating position. The dis-
penser is electrically energized when the switch is in
the right “ON” position. NOTE – The compressor will
start after a 3 minute 20 second delay on the CDS-2
and a 6 minute 30 second delay on the CDS-3.
NOTE: When Day/Night Timer is used, the Day/Night
Switch in the control drawer must be kept in the “DAY”
position.
OFF – All electrical components of the dispenser are
without power when the switch is in the left “OFF”
position.
POWER INDICATOR (Located on the front of the
drawer)
Glows to show that the POWER OFF/ON Switch is in the
right “ON” position.
STATUS INDICATORS
The electronic controls continuously diagnose the operational status of the dispenser and indicate as listed:
FLASHING 50% ON / 50% OFF – Glows while preparing for coolant to flow to the selected hopper. (Flashes for
10-seconds, then glows steady for two minutes.)
STEADY GLOW – Glows for two minutes before coolant flows to the selected hopper, then continues to glow
while coolant flows.
The electronics also sense and indicate error conditions in the dispenser as listed:
ONE FLASH EVERY FOUR SECONDS – Cooling is needed by the selected hopper, but the auger isn’t turning. Try
placing the AUGER switch for the selected hopper in the right “—” position.
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8
OPERATING CONTROLS (Cont.)
TWO FLASHES EVERY FOUR SECONDS – A temperature error is being sensed. Call Bunn-O-Matic for Sup-
port.
THREE QUICK FLASHES – Low auger torque is being sensed. Call Bunn-O-Matic for Support.
FOUR QUICK FLASHES – High auger torque is being sensed. Call Bunn-O-Matic for Support.
DAY/NIGHT TIMER
The quartz driven timer offers 24-hour programming with 96 actuators that operate in 15-minute incre-
ments. All actuators can be individually set to the inside or outside position. The timer is located behind the
right side panel.
SETTING TIME
1.
Locate marker on the inner (stationary) dial that points to
outer dial. The marker is at approximately the two O’clock
position.
2.
Turn outer dial clockwise until the marker is pointing to the
correct time. The clock hands will turn with the outer dial
indicating the same time as the marker. NOTE - the outer dial
has AM and PM settings.
SETTING NIGHT TIME MODE
1.
Locate the actuators positioned around the outer dial. Inward
position indicates day time mode and outer position indicates
night time mode.
P1948
2.
3.
Determine the desired times that night time mode is to begin
and end.
Position all actuators between begin and end times in the
outer position.
Shown in
“Night Time”
Mode
EXAMPLE: Night Time Mode is 11:00 PM - 7:00 AM
Place the actuator at 11:00 PM to the outside position. Con-
tinue placing actuators to the outside position counterclock
wise around the dial to 7:00 AM. All actuators from 7:00 AM
to 11:00 PM must be in the inside position.
NOTE: For Day/Night Timer to operate, the Day/Night Switch
in the control drawer must be kept in the “DAY” position.
P1947
Shown in “Day
Time” Mode
27646 022500
9
USING THE DISPENSER FOR GRANITA-TYPE PRODUCTS
1. Slide the lid for the selected hopper to the front or back to gain access to the hopper.
2. Place the premixed liquid product in the selected hopper.
3. Simply press all switches to the center of the control drawer for granita products.
a. Place the POWER OFF/ON switch in the right “ON” position.
b. Place the auger switch for the selected hopper in the right “—” position.
c. Place the DAY/NIGHT switch in the left “DAY” position.
d. Place the ICE/OFF/NO-ICE switch in the left “ICE” position.
4. Wait for the liquid to freeze to the desired consistency.
HINTS – Bunn-O-Matic recommends that the product in the dispenser be thawed each day, usually overnight.
The ice granules get too large and a consistent product is difficult to maintain if left frozen for an extended
period of time. Place the DAY/NIGHT switch in the right “NIGHT” position for a few hours each night. Then
return it to the left “DAY” position when the product has thawed sufficiently. You’ll know it is in the night
position because the hopper lid lights are out.
USING THE DISPENSER FOR COLD LIQUID PRODUCTS
1. Slide the lid for the selected hopper to the front or back to gain access to the hopper.
2. Place the premixed liquid product in the selected hopper.
3. Simply place all switches to the center of the control drawer except the ICE/OFF/NO-ICE switch.
a. Place the POWER OFF/ON switch in the right “ON” position.
b. Place the auger switch for the selected hopper in the right “—” position.
c. Place the DAY/NIGHT switch in the left “DAY” position.
d. Place the ICE/OFF/NO-ICE switch in the right “NO-ICE” position.
4. Wait for the liquid to cool.
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10
OTHER RECOMMENDATIONS FOR YOUR DISPENSER
•
Whether liquid concentrate or granulated powder, all product must be thoroughly mixed BEFORE adding it
to the hoppers.
•
For best results with granita-type products, use only products with an apparent brix of 12 or higher. Some
products may work with an apparent brix as low as 9. Your experimentation with other products will be the
best guide in this area.
•
•
Keep the premixed liquid product refrigerated. This reduces cooling/freezing time in the dispenser.
Keep the hoppers topped-off during peak serving periods. Add premixed liquid product as it is dispensed.
This reduces the cooling/freezing time and assures you of always having product ready to dispense.
Keep the product level in the hoppers higher than the auger. Air will become entrapped in the mixture result-
ing in a clouded foamy consistency.
You may find it beneficial to turn down the ice controls to keep the ice granules from growing too large.
Refer to the operating controls on page 1-6.
Some products freeze at a lower temperature than others. You may notice frost or ice on the hoppers. This
is normal and should not be a concern.
Humidity in the air may cause sweating on the outside surfaces of the hoppers. This is to be expected and
should not be a concern. The drip trays beneath the hoppers will capture this and cause it to flow to the
lower drip tray for disposal.
•
•
•
•
•
Some noises are to be expected during normal operation of the dispenser. By becoming familiar with the
noises made during normal operation, you will be better able to listen for problems.
27646 022500
11
RECOMMENDED DAILY CLEANING (SUGAR & ALCOHOL PRODUCTS!)
NOTE – Close the control drawer before proceeding.
1. Empty all product from the hoppers.
2. The driptray should be cleaned as needed for proper presentation of the product.
3. Mix a packet of Kay-5 Sanitizer diluted with two-gallons of warm (120° F) water for each hopper.
4. Open the lids and add the solution.
5. Allow the solution to work for about five minutes with the dispenser on the ”NIGHT” position.
6. Drain the sanitizing solution from the hoppers and completely rinse each with clean water.
7. Wash the underside of hopper covers or powder autofill dispensers with hot water and a mild detergent
solution. Rinse all surfaces and apply some commercial sanitizing agent. Do not immerse hopper lids.
NOTE – The hoppers and augers should be removed and disassembled for cleaning at least once a week using
the procedure below.
RECOMMENDED WEEKLY CLEANING (SUGAR & ALCOHOL BASED PRODUCTS!)
RECOMMENDED DAILY CLEANING (DAIRY PRODUCTS!)
NOTE – Close the control drawer before proceeding.
1. Empty all product from the hoppers. Disconnect the hopper lid cords and remove the lids.
2. Lift the hopper up slightly, then 3. Pull the auger from the cool-
4. Disassemble the auger for
cleaning by spreading apart
the latches and removing each
piece.
use a hard plastic utensil to pry
it up. Pull forward to remove.
ing drum. Remove the auger
shaft seal from the front of the
cooling drum and the cooling
drum seal from the rear of the
drum.
5. Spread the sides of the dis-
pense handle and pull it off to
remove the faucet pieces.
7. Squeeze the O-rings to free
them from the grooves in the
faucet spool.
6. Push the metal pin out through
the faucet. Unscrew the plastic
cap, and push the faucet spool
and spring out the bottom.
9. Remove the black plug from the
faucet spool for cleaning. Do
not use tools to remove this.
12
8. Roll the O-rings off of the faucet
10. Pull down, then out on the
spool.
air filter at the rear of the dis-
penser.
27646 022500
RECOMMENDED WEEKLY CLEANING (CONT.)
11. Wash all components with a wash cloth in mild hot water and detergent solution. Do not immerse hopper
lids.
12. Wash the drums, hopper drip trays, top covers, and outer enclosure using a clean wash cloth that has been
dampened in a mild solution of detergent and hot water.
13. Thoroughly rinse all surfaces with a clean wash cloth that has been dampened with hot water. Wipe dry with
a clean dry wash cloth before reassembling the dispenser.
14. Remove the lower drip tray assembly. Wash and thoroughly rinse all pieces before reinstallation.
NOTE – Although most parts are dishwasher safe, they may be affected by some commercial sanitizing agents.
Do not place the hopper nor hopper lids in a dishwasher.
LUBRICATION
NOTE – Use BOM M2550.0000 lubricant where specified.
3. Install the seals over the flange
at the rear of the cooling drums
as shown.
1. Squeeze some lubricant into 2. Apply a thin film of lubricant to
hand.
each cooling drum seal.
5. Apply a thin film of lubricant to 6. Install the seals on the auger
4. Press the seals firmly into
the inside of each auger shaft
seal.
shafts. Wipe the cooling drums
to remove any excess lubri-
cant.
place.
8. Thoroughly rinse the hoppers
and install them over the cool-
ing drums with augers. Slide
them into place and push them
down as far as they will go.
As much as possible, keep
lubricant from the inside of the
hoppers. The cleaner you keep
the food zone, the cleaner the
product you’ll serve the cus-
tomer.
7. Align the auger shafts with the
flat fin of the augers. Push the
augers as far as they will go and
rotate them so the flat fins are
pointing up.
9. Set the lids on the hoppers.
27646 022500
13
LUBRICATION (cont.)
10. Reinstall the black plug into the 11. Apply a thin film of lubricant to 12. Slide the O-rings onto the
faucet spool. Do not lubricate
the plug.
each faucet spool O-ring.
spools.
13. Reinstall the plastic caps, 14. Plug in the hopper lid lamp 15. Assemble the drip tray.
springs, spools, and metal
pins. Spread the dispense
handles and reinstall them.
cables.
NOTE – When reinstalling the faucet NOTE – The faucet spool plugs, faucet O-rings, cooling drum hopper seals,
caps, they MUST be twisted as
far as they will go. (Past the
point where it clicks.)
and auger shaft seals are to be replaced whenever they appear worn
or damaged. Bunn-O-Matic recommends their replacement at least
every six-months. Refer to page 24 for replacement instructions.
FAUCET HANDLES
Dispensing from the hoppers will occur when the faucet handles are
installed with the handles in the upright position. (shown, left hopper)
Dispensing from the hoppers will not occur when the handles are in-
stalled upside-down. (shown, right hopper) You may consider this handle
position when the product in the hoppers is not yet ready to serve. Just
spread the handles or disassemble them as shown, and install them upside
down.
DISASSEMBLY
1. Unscrew the balls from the handle assemblies. Turn them in a counter-
clockwise direction until they are no longer attached to the handles.
2. Remove the metal sleeves from the assemblies.
3. Separate the two halves of the handles and remove them from the
faucet bodies.
ASSEMBLY
1. Place the two halves of the handles on the faucet bodies. Check that the faucet dowel pins are in place all
the way through the faucet bodies. The dowel pins must be captured by the keyholes in the handle halves.
2. Place the metal sleeves over the threads and install the balls by turning them in a clockwise direction.
27646 122200
14
AUGER ASSEMBLY & DISASSEMBLY (EARLY AUGERS ONLY)
The augers may look intimidating at first glance. But there are really just a
few pieces snapped together. Please familiarize yourself with this procedure. It’ll
make cleaning and routine maintenance easier. The augers should be taken apart
for cleaning and then reassembled for use.
Short Auger Latch
Auger Sections (3 req’d.)
Long Auger Latch
Auger Nose
ASSEMBLY
1. Snap one of the auger sections
to the long auger latch.
4. Snap the auger nose onto the
last section installed.
2. Snap another auger section
in place.
5. With the long auger latch on
top, place the short auger
latch inside the augers and
snap it onto the assembly.
3. Snap the third auger
section in place.
DISASSEMBLY
1. Firmly pull the auger section connections apart at each slot in the long auge
2. Firmly pull the connection between the auger section and auger nose apart.
3. Separate the slots in the short auger latch as you remove the auger sections
27646 022500
15
TROUBLESHOOTING
A troubleshooting guide is provided to suggest probable causes and remedies for the most likely problems
encountered. If the problem remains after exhausting the troubleshooting steps, contact the Bunn-O-Matic
Technical Service Department.
•
•
•
Inspection, testing, and repair of electrical equipment should be performed only by qualified service person-
nel.
All electronic components have 120 volt ac and/or low voltage dc potential on their terminals. Shorting of
terminals or the application of external voltages may result in board failure.
Intermittent operation of electronic circuit boards is unlikely. Board failure will normally be permanent. If
an intermittent condition is encountered, the cause will likely be a switch contact or a loose connection at a
terminal or crimp.
•
Keep away from combustibles.
WARNING – • Exercise extreme caution when servicing electrical equipment.
• Unplug the dispenser when servicing, except when electrical tests are specified.
• Follow recommended service procedures
• Replace all protective shields or safety notices
PROBABLE CAUSE
PROBLEM
REMEDY
1. No power or incorrect voltage to
the dispenser
Doesn’t work
(A) Check for proper voltage at the
wall outlet.
(Switches do nothing, auger not
turning, no hopper lid lights, no fan,
no compressor sound.)
(B) Check circuit breakers or fuses.
2. ON/OFF Switch
(A) The ON/OFF Switch must be in
the “ON” position.
(B) Refer to Service - Dispenser ON/
OFF Switch for testing procedures.
See page 37.
1. DAY/NIGHT Switch
2. Lamp Cord Assembly
Hopper Lid Lights not on
(A) The DAY/NIGHT Switch must be
in the “DAY” position.
(B) Refer to Service - DAY/NIGHT
Switch for testing procedures. See
page 36.
(A) The lamp cord must be plugged
into the lamp cord connector.
(B) Refer to Service - Lamp Cord
Assembly for testing procedures.
See page 42.
27646 122200
16
TROUBLESHOOTING (cont.)
PROBLEM
PROBABLE CAUSE
REMEDY
Hopper Display Lights not on 3. Circuit Breaker
(cont.)
(A) The circuit breaker must not be
tripped.
(B) Refer to Service - Circuit Breaker
for testing procedures. See page
27.
4. Lamps
Remove the lamps and check for
continuity across the base and tip.
Replace if necessary.
5.Transformer
Refer to Service - Transformer for
testing procedures. See page 49.
6. Lamp Holder/Socket Assy
RefertoService-LampHolder/Sock-
et Assembly for testing procedures.
See page 44.
Auger Motor won’t turn
1. Auger ON/OFF Switch(es)
(A) The auger switch must be in the
“ON” position.
(B) Refer to Service - Auger ON/OFF
Switch(es) for testing procedures.
See page 26.
2. Auger Motor Capacitor(s)
3. Auger Motor(s)
Refer to Service - Auger Motor
Capacitor(s) for testing procedures.
See page 23.
RefertoService-AugerMotor(s)for
testing procedures. See page 22.
Fan not spinning (With adjustment 1. Fan Motor
Board L.E.D.s ON steadily for two
minutes)
RefertoService-FanMotorfortest-
ing procedures. See page 39.
Fan spins after compressor shuts 1. Time Delay
off
The fan motor will run for approxi-
matelytwominutesaftercompressor
shuts off.
27646 122200
17
TROUBLESHOOTING (cont.)
PROBLEM
REMEDY
PROBABLE CAUSE
Thedispensermustnotbeconnected
with an extension cord. Refer to
Electrical Requirements.
Compressor not running
(With Adjustment Board L.E.D.s ON
steadily for two minutes)
1. Power cord
Refer to Service - Fuse and Fuse
Holder for testing procedures. See
page 40.
2. Fuse
Refer to Service - Contactor for test-
ing procedures. See page 34.
3. Contactor
Refer to Service - Electronic Control
for testing procedures. See page
38.
4. Electronic Control
Refer to Service - Compressor Start
Relay for testing procedures. See
page 28 (CDS-2) or 31 (CDS-3).
5. Compressor Start Relay
Refer to Service - Compressor Ther-
mal Overload Protector for testing
procedures. See page 28 (CDS-2)
or 31 (CDS-3).
6. Thermal Overload Protector
Refer to Service - Compressor Start
Capacitorfortestingprocedures.See
page 28 (CDS-2) or 31 (CDS-3).
7. Compressor Start Capacitor
8. Compressor
Refer to Service - Compressor for
testing procedures. See page 28
(CDS-2) or 31 (CDS-3).
RefertoTroubleshooting-AugerMo-
tor Won’t Turn on previous page.
Compressor runs but will not cool 1. Auger not turning
(With adjustment Board L.E.D.s
flashing once every 4 seconds)
Refer to Service - Temperature Sen-
sorAssemblyfortestingprocedures.
See page 47.
Compressor runs but will not cool 1. Temperature Sensor Assembly
(With adjustment Board L.E.D.s
flashing twice every 4 seconds)
Refer to Service - Torque Sensor
CircuitBoardfortestingprocedures.
See page 48.
Compressor runs but will not cool 1. Torque Sensor Circuit Board
(With adjustment Board L.E.D.s
flashing 3, or 4 times every 4
seconds)
27646 122200
18
TROUBLESHOOTING (cont.)
PROBLEM
PROBABLE CAUSE
REMEDY
Compressor runs but will not cool 2. Air Filter or Condenser
(With adjustment Board L.E.D.s
flashing 3, or 4 times every 4
seconds) (cont.)
TheairfilterandcondenserMUSTbe
cleaned regularly. Any dust buildup
will affect cooling ability.
3. Refrigerant
Haveaqualifiedservicepersoncheck
the refrigerant charge.
Product Won’t Freeze
1. DAY/NIGHT Switch
(A) The DAY/NIGHT Switch must be
in the “DAY” position.
(B) Refer to Service - DAY/NIGHT
Switch for testing procedures. See
page 36.
2. Sugar content of product
3. Voltage Divider
Bunn recommends the use of prod-
ucts with an apparent brix of 12 or
higher.
RefertoService-VoltageDividerfor
testing procedures. See page 50.
Product freezes but ice granules are 1. Ice adjustment
too fine or too large
Turn the Ice control for the desired
hopper a small amount clockwise
to increase the ice granule size or
counterclockwise to decrease the
ice granule size.
2. Sugar content of product
Adjust the sugar content of the
product. Increasing the apparent
brix results in finer ice granules.
Decreasing the apparent brix results
in larger ice granules.
Dispenserismakingunusualnoises. 1. Lubrication
(Somenoisesareanormaloccurance
with this type of device. You need to
become familiar with those that are
normal,todeterminewhentheyhave 2. Cooling Drum(s)
become unusual.)
Always lubricate the dispenser as
directed in this manual before reas-
sembling and using the dispenser.
Use the cooling drum support to
determine that the auger shaft is still
the proper distance from the hopper
drip tray. The cooling drum may be
gently lifted to return it to the nec-
essary horizontal position. Refer to
Service - Cooling Drum Alignment.
See page 35.
27646 122200
19
TROUBLESHOOTING (cont.)
PROBLEM
REMEDY
PROBABLE CAUSE
Removetheairfilterattherearofthe
dispenser and listen for fan motor
noise. Replace the motor if exces-
sively noisy.
Dispenserismakingunusualnoises. 3. Fan Motor
(Somenoisesareanormaloccurance
with this type of device. You need to
become familiar with those that are
normal,todeterminewhentheyhave
PlacetheAugerswitchesinthe“ON”
position and the ICE/OFF/NO-ICE
switchesinthe“OFF”position.Listen
for auger motor noise. Replace the
motor if excessively noisy.
become unusual.) (cont.)
4. Auger Motor(s)
Product is leaking into the inside of
the drum.
ReplaceShaft. Refer to Service -Au-
ger Shaft Assembly. See page 24.
1. Worn Shaft
2. Worn Seals
Replace Cooling Drum Seal. Refer
to Service - Auger Shaft Assembly.
See page 24.
27646 122200
20
SERVICE
This section provides procedures for testing and replacing various major components used in this dispenser
should service become necessary. Refer to Troubleshooting for assistance in determining the cause of any prob-
lem.
WARNING - Inspection, testing, and repair of electrical equipment should be performed only by qualified service
personnel. The dispenser should be disconnected from the power source when servicing, except when electrical
tests are required and the test procedure specifically states to connect the dispenser to the power source.
COMPONENT ACCESS
WARNING - Disconnect the dispenser from the power source before the removal of any panel or the replacement
of any component.
All components are accessible by removal of the auger motor cover, lower drip tray, front cover and the left
and right side covers.
Refer to the contents listing for component location.
Contents
Auger Motors....................................................................................................22
Auger Motor Capacitors....................................................................................23
Auger Shaft Assembly.......................................................................................24
Auger ON/OFF Switches....................................................................................26
Circuit Breaker ..................................................................................................27
Compressor (CDS-2) ........................................................................................28
(Compressor, Compressor Start Capacitor, Compressor Start Relay, Thermal Overload Protector)
Compressor (CDS-3) ........................................................................................31
(Compressor, Compressor Start Capacitor, Compressor Start Relay, Thermal Overload Protector)
Contactor ..........................................................................................................34
Cooling Drum Alignment...................................................................................35
Day/Night Switch ..............................................................................................36
Dispenser ON/OFF Switch.................................................................................37
Electronic Control .............................................................................................38
Fan....................................................................................................................39
Fuse and Fuse Holder........................................................................................40
ICE/OFF/NO ICE Switch.....................................................................................41
Lamp Cord Assembly........................................................................................42
Lamp Cord Connector.......................................................................................43
Lamp Holder/Socket Assembly.........................................................................44
L.E.D./Adjustment Board...................................................................................45
Solenoids..........................................................................................................46
Temperature Sensor Assembly .........................................................................47
Torque Sensor Circuit Board .............................................................................48
Transformer .....................................................................................................49
Voltage Divider..................................................................................................50
Coolant Schematics ..........................................................................................51
Electrical Schematics........................................................................................54
27646 122200
21
SERVICE(CONT.)
AUGER MOTORS
4. Disconnect the auger motor terminal from the
terminal on the main wiring harness.
5. Remove the three remaining #8 locking screws
securing the auger motor mounting bracket to
cooling drum mounting bracket.
6. Removemotorwithmountingbracket,driptray,split
pin and torsion spring bearing as an assembly.
NOTE: When removing or installing the motor be sure
the split pin in the motor shaft is turned to a position
that will clear the torque sensor circuit board.
7. Install new motor with mounting bracket, drip tray,
split pin and torsion spring bearing using three #8
locking screws onto the cooling drum bracket.
8. Install the auger motor capacitor on the lower right
side of the auger mounting bracket, using the re-
maining #8 locking screw.
P1341
FIG. 1 AUGER MOTORS
9. Connect the auger motor terminal to the terminal
on the main wiring harness.
10. Refer to Fig. 2 when reconnecting the wires.
Location
The auger motors are located at the upper rear of
the dispenser chassis inside the auger motor covers.
Test Procedures
1. Disconnect the dispenser from the power source.
2. Disconnect the wires from the motor to be test-
ed.
3. With a voltmeter, check the voltage across the
white/brown wire for the left motor, the white/blue
wire for the right motor, or the grey wire for the
center motor and the white/black wire. Place the
appropriate auger switch in the “-” (“ON”) position.
Connect the dispenser to the power supply. The
indication must be:
a) 120 volts ac for 120 volt models.
b) 230 volts ac for 230 volt models.
4. Disconnect the dispenser from the power supply.
If voltage is present as described, replace the motor.
If voltage is not present as described, refer to the Wiring
Diagram and check the dispenser wiring harness.
P1321
FIG. 2 AUGER MOTOR TERMINALS
Removal and Replacement
1. Remove the two #8 locking screws securing the
auger motor cover to the cooling drum mount as-
sembly.
2. Remove the cover and set aside for reassembly.
3. Remove the #8 locking screw on the lower right
side of the auger motor mounting bracket securing
the auger motor run capacitor. Set capacitor aside
with wires attached.
27646 022500
22
SERVICE (CONT.)
AUGER MOTOR CAPACITOR
Removal and Replacement
1. Remove the two #8 locking screws securing the
auger motor cover to the cooling drum mount
assy.
2. Remove the cover and set aside for reassembly.
3. Disconnect the wires from the auger motor capaci-
tor terminals.
4. Remove the #8 locking screw on the lower right
side of the auger motor mounting bracket securing
the auger motor capacitor.
5. Install a new capacitor on the lower right side of
the auger mounting bracket and secure with a #8
locking screw.
6. Reconnect the wires to the capacitor terminals.
7. Refer to Fig. 4 when reconnecting the wires.
P1341
FIG. 3 AUGER MOTOR CAPACITORS
Location:
Theaugermotorcapacitorsarelocatedonthelower
right side of the auger motor mounting bracket inside
the auger motor covers.
Test Procedures:
1. Disconnect the dispenser from the power source.
2. Disconnect the wires from the capacitor to be
tested.
P1324
FIG. 4 AUGER MOTOR CAPACITOR TERMINALS
3 With a voltmeter, check for voltage across the
white/blue wire on the right capacitor, the white
/brown wire on the left capacitor, or the grey wire
on the center capacitor and the white/black wire
on the auger motor terminal. Place the appropriate
augerswitchinthe“-”(“ON”)position. Connectthe
dispenser to the power source.The indication must
be:
a) 120 volts ac for 120 volt models.
b) 230 volts ac for 230 volt models.
4. Disconnect the dispenser from the power source.
If voltage is present as described, proceed to #5.
If voltage is not present as described, refer to the Wiring
Diagram and the dispenser wiring harness.
5. Checkforcontinuityacrosstheaugermotorcapaci-
tor terminals.
If continuity is present as described, reconnect the
wires to the auger motor capacitor.
If continuity is not present as described, replace the
auger motor capacitor.
27646 022500
23
SERVICE (cont.)
7. Pull the auger shaft assembly straight out of cool-
ing drum. Inspect the shaft for abnormal wear or
scoring.
AUGER SHAFT ASSEMBLY
8. From the front of dispenser, remove the seal and
blue bushing from cooling drum and discard
them.
Auger Shaft Assy
9. Clean seal and busing surfaces of the cooling
drum very thoroughly. All old lubricant must be
removed.
10. Refer to Fig 6A and slip new blue bushing into
cooling drum. Lightly lube I.D. of bushing
with #M2550.0000 “Lubri-film” provided in Kit
#28106.0000 (CDS-2) or #28106.0001 (CDS-3). Do
not use anything such as a cotton swab that might
leave lint or unravel. DON NOT GET ANY LUBE ON
THE SEAL COUNTERBORE SURFACE.
11. Lightly lube I.D. of new cooling drum seal with
#M2550.0000, provided in kit. Use care not to get
any lube on O.D. of seal. Place seal on insertion
tool #28395.0000, as shown in Fig. 6B. Make sure
open face of seal is toward cooling drum.
12. Push seal into bore until it is firmly seated; remove
tool.
Auger Shaft Bushing
Cooling Drum Seal
Auger Shaft Seal
Hopper Drum Seal
P1758
FIG. 5 AUGER SHAFT ASSEMBLY
Location:
The Auger Shaft Assembly is located in each of the
cooling drums.
13. Clean the auger shaft assembly, then wipe a small
amount of #M2550.0000 “Lubri-film” (provided in
kit) over the first two inches of the front end of the
shaft.
14. Place a small amount of #29563.0000 “Krytox”
lubricant (provided in kit in a plastic cap) on the
end of the motor shaft (about 1 1/2”) and a thin
film in the groove. Install auger shaft assembly onto
the motor shaft. See Fig. 6C. Do not use too much
“Krytox” lubricant.
Removal and Replacement:
1. Drain, remove and clean hopper; refer to the Rec-
ommended Daily Weekly Cleaning Section of this
manual, page 12, for proper cleaning procedures.
Discard the auger shaft seal, hopper/drum seal and
faucet spool o-rings.
2. Remove the #8 locking screws securing auger
motor cover to the cooling drum mount assembly;
remove cover and set aside for reassembly.
3. Remove the #8 locking screw on the lower right side
(viewed from front) of the auger motor mounting
bracket securing the auger motor run capacitor. Set
capacitor aside with wires attached.
NOTE - This is the only place “Krytox” lubricant is
used.
4. Disconnect the auger motor terminal from the
terminal on the main wiring harness.
5. Remove the remaining #8 locking screws securing
the auger motor mounting bracket to cooling drum
mounting bracket.
6. Remove motor with mounting bracket, drip tray (if
present) split pin and torsion spring bearing as an
assembly.
15. Assemble motor/shaft assembly as shown in Fig.
6C, then install assembly into cooling drum. Make
sure the pins do not hit the sensor board and cool-
ing drum seal is not dislodged as the shaft passes
through.
16. Secure motor and capacitor to the cooling drum
mounting bracket. Install rear motor cover.
17. Refer to Initial Setup for hopper assembly and
installation procedures. Be sure to use new hop-
per/drum seal, auger shaft seal and faucet spool
o-rings when reassembling.
NOTE - When removing or installing motor and shaft
assemblies, be sure the split pins are turned to a posi-
tion that will clear the torque sensor circuit board.
27646 122200
24
SERVICE (cont.)
AUGER SHAFT ASSEMBLY(cont.)
Lube about 1 1/2” of
shaft and in the groove
with #29563.0000 “Kry-
tox” Lubricant
Lightly lube the bushing I.D.
with M2550.0000 “Lubri-
Film”
Auger Shaft Assy
Do NOT get any Lube on this
surface
Lube about 2.0” of shaft
with #M2550.0000 “Lu-
bri-film”
P1759
P1761
FIG. 6A AUGER SHAFT BUSHING
FIG. 6C MOTOR/SHAFT ASSEMBLY
Open face of seal away
from tool
Cooling Drum Seal
Seal Insertion Tool
P1760
FIG. 6B COOLING DRUM SEAL
27646 122200
25
SERVICE (cont.)
AUGER ON/OFF SWITCHES
If continuity is present as described, the auger switch
is operating properly.
If continuity is not present as described, replace the
auger switch.
Removal and Replacement:
1. Pull the dispenser drawer out until the drawer hits
the drawer stop. Using a screwdriver gently pry up
on the drawer stop and remove the drawer from
the dispenser.
2. Remove the four #8-32 locking screws securing
the switch panel to the drawer.
3. Lift the switch panel with wires and L.E.D./adjust-
ment board out as an assembly.
4. Turn switch panel over and remove the wires from
the auger switch that is to be replaced.
5. Compress the clips on the back of the control panel
and gently push switch through the opening.
6. Push the new switch into the opening, with the “o”
on the switch to the outside, until the clips snap
into position.
7. Reconnect the wires to the switch. Refer to Fig. 8
when reconnecting wires.
8. Position the switch panel inside the drawer and
secure with four #8-32 locking screws.
9. Reinstall drawer.
P1343
FIG. 7 AUGER ON/OFF SWITCHES
Location:
Theaugerswitchesarelocatedinsidethedispenser
drawer.
Test Procedures:
1. Disconnect the dispenser from the power source.
2. Disconnect the white/green wire from the switch
to be tested and white/black wire from contactor
located on the outside bottom of the component
bracket .
3. Withavoltmeter,checkthevoltageacrossthewhite/
green and the white/black wires and the “ON/OFF”
switch in the “ON” position. Connect the dispenser
to the power source. The indication must be:
a) 120 volts ac for 120 volt models.
b) 230 volts ac for 230 volt models.
4. Disconnect the dispenser from the power source.
If voltage is present as described, reconnect the white/
black wire to the contactor and proceed to #5.
If voltage is not present as described, refer to the Wiring
Diagram and check the dispenser wiring harness.
P1336
FIG. 8 AUGER SWITCH TERMINALS
5. Remove the white/blue wire from the right auger
switch, the white/brown wire from the left auger
switch, or the grey wire from the center auger
switch.
6. With the auger switch to be tested in the “ON”
position check for continuity across the terminals.
Continuity must not be present when the switch is
in the “OFF” position.
27646 122200
26
SERVICE (cont.)
CIRCUIT BREAKER
5. Push the new circuit breaker into the opening in
the component bracket until the clips snap into
position.
6. Reconnect the wires to the circuit breaker.
7. Position the component bracket in chassis and
secure with four #8-32 locking screws.
8. Refer to Fig. 10 when reconnecting the wires.
RED from Transformer
R2
2
P1342
FIG. 9 CIRCUIT BREAKER
Location:
The circuit breaker is located inside the dispenser
on the upper left side of the component bracket.
RED from Main Harness
P1330
Test Procedures:
FIG. 10 CIRCUIT BREAKER TERMINALS
1. Disconnect the dispenser from the power source.
2. Remove the wires from the circuit breaker.
3. Check for continuity between the terminals. Conti-
nuity must be present between the terminals.
If continuity is present as described the circuit breaker
is functioning properly.
If continuity is not present as described, press the reset
button and repeat step #3, if continuity is not present
as described, replace the circuit breaker.
Removal and Replacement:
1. Remove the four #8-32 locking screws securing
the component bracket to the chassis.
2. Tip the top of the component bracket forward far
enough to allow access to the rear of the circuit
breaker.
3. Remove the wires from the circuit breaker.
4. Compress the clips on the back side of the com-
ponent bracket and gently push the circuit breaker
through the opening in the component bracket.
27646 122200
27
Test Procedures:
SERVICE (cont.)
WARNING: The compressor start capacitor must be
properly discharged before proceeding.
COMPRESSOR & COMPONENTS (CDS-2)
Compressor Start Relay: Refer to FIG. 12
1. Disconnect the dispenser from the power source.
2. Remove compressor terminal cover retainer (6)
and compressor terminal cover (5).
3. Disconnect the black wire from the thermal over-
load protector (3) and white/black wire from the
compressor start relay (1).
R
2
4. With a voltmeter, check voltage across the black
wire and the white/black wire and the ON/OFF
switch in the “ON” position, DAY/NIGHT switch in
the “DAY” position and the ICE/OFF/NO ICE switch
in the “ICE” position. Connect the dispenser to the
power source. The indication must be 120 volts ac
for two wire 120 volt models or 230 volts ac for
two wire 230 volt models.
P1342
FIG. 11 COMPRESSOR ASSY
Location:
The compressor assy is located inside the front
of the dispenser chassis.
5. Disconnect the dispenser from the power source.
If voltage is present as described, proceed to #6.
If voltage is not present as described, refer to the Wiring
Diagram and check the dispenser wiring harness.
6. Disconnect the two black wires from the compres-
sor start capacitor.
1
4
7. Remove relay from the compressor.
8. Check for continuity across the upper left terminal
and the right pin socket on the rear of the relay.
R
22
3
2
5 6
If continuity is present as described, the compressor
start relay is operating properly.
120V COMPRESSORS
4
3
1
If continuity is not present as described, replace re-
lay.
Compressor:
1. With the compressor start relay (1) removed, dis-
connect the black wire from the compressor.
2. Check for continuity across the terminal on the
compressor and the left pin on the compressor.
5 6 7
R2
2
If continuity is present as described, the electrical part
of the compressor is operating properly.
P1344
230V COMPRESSORS
If continuity is not present as described, replace the
compressor.
FIG. 12 COMPRESSOR ELECTRICAL COMPONENTS
1. Compressor Start Relay
Thermal Overload Protector:
1. Check for continuity across the terminals on the
thermal overload protector (3).
2. Overload Protector Retainer
3. Thermal Overload Protector
4. Compressor Start Capacitor
5. Compressor Terminal Cover
6. Compressor Terminal Cover Retainer
7. Compressor Run Capacitor
If continuity is present as described, the thermal over-
load protector is operating properly.
If continuity is not present as described, replace the
thermal overload protector.
27646 122200
28
SERVICE (cont.)
11. Position the component bracket in the chassis and
secure with four #8-32 locking screws.
12. Reconnect tubes from the condenser and the ac-
cumulator to the compressor.
COMPRESSOR & COMPONENTS (CDS-2) (cont.)
Compressor Start Capacitor:
1. Check for continuity across the terminals on the
compressor start capacitor.
13. Evacuate the system.
NOTE: When replacing the compressor it is recom-
mended that the dryer also be replaced.
14. Recharge 120V system with 8.4 oz. of Type R22
refrigerant. Design Pressures: High 210 - Low 32
Recharge 230V system with 9.5 oz. of Type 404A
refrigerant. Design Pressures: High 215 - Low 40
If continuity is present as described, the start capacitor
is operating properly.
If continuity is not present as described, replace the
capacitor.
NOTE: If all the electrical components are operating
properly and the compressor does not operate, there is an
internal mechanical problem. Replace the compressor.
NOTE: The charging of the system must be done by a
licensed refrigeration repair person.
Compressor Start Capacitor: Refer to FIG. 12
Removal and Replacement:
Compressor Assy:
WARNING: The compressor start capacitor must be
properly discharged before proceeding.
1. Remove terminal cover retainer (6) and terminal
cover (5). Set aside for reassembly.
2. Disconnect the two leads from the capacitor.
3. Pry the end of the capacitor mounting bracket off of
the boss on the capacitor and remove the capaci-
tor.
4. Install new capacitor on the capacitor mounting
bracket.
5. Refer to Fig. 13 and reconnect the wires to the ca-
pacitor.
NOTE: Before removal of any refrigeration component
the refrigerant in the system must be reclaimed by a
licensed refrigeration repair person.
1. Disconnect the tubes from the condenser and the
accumulator.
2. Disconnect the compressor wiring harness from the
dispenser main wiring harness.
3. Remove the four .25-20 keps nuts and washers se-
curing the compressor to the chassis. Set nuts and
washers aside for reassembly.
4. Remove the four #8-32 locking screws securing the
component bracket to the dispenser chassis.
5. Disconnect the wires from the circuit breaker, fuse
holder, transformer, electronic control and the con-
tactor.
6. Reinstall terminal cover (5) and cover retainer (6).
6. Removecomponentbracketwithcircuitbreaker,fuse
holder, transformer, electronic control and contactor
as an assembly. Set component bracket and screws
aside for reassembly.
7. From the right side of the dispenser lift the compres-
sor assembly over the four studs in the chassis and
remove compressor.
120V DISPENSERS
8. Install new compressor over the four studs in the
dispenser chassis with the fill valve to the left side
of the dispenser.
9. Secure compressor to the dispenser chassis using
four .25-20 keps nuts and washers.
10. Reconnect the wires to the components on the com-
ponentbracketandplugthemainwiringharnessinto
the electronic control.
230V DISPENSERS
FIG. 13 COMPRESSOR START CAPACITOR
NOTE: When reconnecting wires refer to Fig. 10 for
circuit breaker, Fig. 34 for fuse holder, Fig. 51 for trans-
former and Fig. 22 for contactor.
P1340
TERMINALS
27646 122200
29
Compressor Thermal Overload Protector (230V):
Refer to FIG. 12
1. Remove terminal cover retainer (6) and terminal
cover (5).
2. Disconnect the black wire from the thermal overload
protector.
SERVICE (cont.)
COMPRESSOR & COMPONENTS (CDS-2) (cont.)
Compressor Start Relay: Refer to FIG. 12
1. Remove the terminal cover retainer (6) and the
terminal cover (5)
3. Pullthermaloverloadprotectoroffofthecompressor
pin and discard.
4. Push new thermal overload protector onto the com-
pressor pin.
5. Refer to Fig. 15 and reconnect the wire.
6. Reinstall terminal cover (5) and cover retainer (6).
WARNING: The compressor start capacitor must be
properly discharged before proceeding.
2. Disconnect the wires from the compressor start
relay.
3. Pull relay (1) off of the compressor pins and dis-
card.
4. Push new relay onto the compressor pins.
5. Refer to Fig. 14 and reconnect the wires.
6. Reinstall terminal cover (5) and cover retainer (6).
120V DISPENSERS
120V DISPENSERS
230V DISPENSERS
P1339
FIG. 15 THERMAL OVERLOAD PROTECTOR
TERMINALS
Compressor Run Capacitor (230V Dispensers Only):
Refer to FIG. 12
1. Remove terminal cover retainer (6) and terminal
cover (5).
230V DISPENSERS
FIG. 14 COMPRESSOR START RELAY
P1338
2. Disconnect the run capacitor leads.
3. Remove the #6 crimptite screw securing the run
capacitor to the rear of the component bracket.
4. Remove run capacitor and discard.
5. Place new run capacitor on the rear of component
bracket and secure with #6 crimptite screw.
6. Refer to Fig. 15A and reconnect the wires.
TERMINALS
Compressor Thermal Overload Protector (120V): Refer
to FIG. 12
1. Remove terminal cover retainer (6) and terminal
cover (5).
2. Disconnectthewirefromthermaloverloadprotector
tothecompressorandthewirefromthecompressor
wiring harness to the thermal overload protector.
3. Remove overload protector retainer (2) and thermal
overload protector (3) as an assembly.
4. Remove retainer (2) from overload protector (3) and
discard overload protector.
5. Install retainer (2) on new overload protector (3).
6. Install retainer (2) and overload protector (3) on the
compressor terminal bracket.
7. Refer to Fig. 15 and reconnect the thermal overload
protector wires.
8. Reinstall terminal cover (5) and cover retainer (6).
P1816
FIG. 15A COMPRESSOR RUN CAPACITOR
TERMINALS
27646 122200
30
3. Disconnect the black wire to the thermal overload
protector (4), the white and black or red wires to
the compressor.
SERVICE (cont.)
COMPRESSOR & COMPONENTS (CDS-3)
4. Withavoltmeter,checkvoltageacrosstheblackwire
removed from the thermal overload protector and
the white wire with the ON/OFF switch in the “ON”
position, DAY/NIGHT switch in the “DAY” position
and the ICE/OFF/NO ICE switch in the “ICE” posi-
tion. Connect the dispenser to the power source.
The indication must be:
1
a) 120 volts ac for 120 volt models.
b) 230 volts ac for 230 volt models.
5. Disconnect the dispenser from the power source.
If voltage is present as described, proceed to #6.
If voltage is not present as described, refer to the Wiring
Diagram and check the dispenser wiring harness.
6. Disconnect the two black wires from the compres-
sor start capacitor.
2 3
FIG. 16 COMPRESSOR &
COMPONENT LOCATIONS
P1558.30
Location:
7. Check for continuity across contacts 1 & 2 of the
relay.
The compressor assy is located inside the front
of the dispenser chassis.
If continuity is present as described, the compressor
start relay is operating properly.
If continuity is not present as described, replace re-
lay.
Compressor:
1. Withthecompressorstartrelay(1)removed,discon-
nect the black or red wire from the compressor.
2. Check for continuity across the terminal on the
compressor and the left pin on the compressor.
4
5
If continuity is present as described, the electrical part
of the compressor is operating properly.
6
7
If continuity is not present as described, replace the
compressor.
FIG. 17 COMPRESSOR THERMAL
P1819
OVERLOAD PROTECTOR LOCATION
1. Compressor Start Relay
Thermal Overload Protector:
1. Check for continuity across the terminals on the
thermal overload protector.
If continuity is present as described, the thermal over-
load protector is operating properly.
If continuity is not present as described, replace the
thermal overload protector.
2. Compressor Start Capacitor
3. Compressor Run Capacitor
4. Thermal Overload Protector
5. Overload Protector Retainer
6. Compressor Terminal Cover
7. Compressor Terminal Cover Retainer
Compressor Start Capacitor:
1. Check for continuity across the terminals on the
compressor start capacitor.
If continuity is present as described, the start capacitor
is operating properly.
If continuity is not present as described, replace the
capacitor.
Test Procedures:
Compressor Start Relay: Refer to FIG. 17
WARNING: The compressor capacitors must be prop-
erly discharged before proceeding.
1. Disconnect the dispenser from the power source.
2. Remove the compressor terminal cover retainer
(7) and compressor terminal cover (6).
27646 122200
31
13. Slidenewcompressorintopositiononthedispenser
chassis, with the tube connections to the front.
14. Securecompressortothedispenserchassisusing
four .312”-18 screws, washers and nuts.
15. Install the fan on the condenser shroud and secure
with three #6 thread cutting screws.
16. Reconnect the leads on the fan to the main har-
ness.
17. On dispensers serial number CDS0019500 - up
install the contactor bracket, contactor, contactor
cover and compressor wiring harness as an as-
sembly. Secure contactor bracket to the chassis
using two #8-32 screws.
SERVICE (cont.)
COMPRESSOR & COMPONENTS (CDS-3) (cont.)
Compressor Run Capacitor:
1. Check for continuity across the terminals on the
compressor run capacitor.
If continuity is present as described, the run capacitor
is operating properly.
If continuity is not present as described, replace the
capacitor.
NOTE: If all the electrical components are operat-
ing properly and the compressor does not operate,
there is an internal mechanical problem. Replace the
compressor.
18. Refer to Fig.17A and reconnect the wires to the
compressor.
Removal and Replacement:
19. Position the component bracket in the chassis and
secure with four #8-32 locking screws.
20. Reconnect tubes from the condenser and the
accumulator to the compressor, also reconnect
access valve and tube.
Compressor Assy:
NOTE: Before removal of any refrigeration component
the refrigerant in the system must be reclaimed by a
licensed refrigeration repair person.
1. Disconnect the tubes from the condenser, accu-
mulator also remove access valve and tube..
2. Disconnect the compressor wiring harness from
the dispenser main wiring harness.
21. Evacuate the system.
NOTE: When replacing the compressor it is recom-
mended that the dryer also be replaced.
3. Remove the four .312”-18 screws, keps nuts and
washers securing the compressor to the chassis.
Set screws, nuts and washers aside for reassem-
bly.
4. Remove the four #8-32 locking screws securing
the component bracket to the dispenser chassis.
5. Pull the component bracket, with wires attached,
out of the chassis far enough to gain access to the
compressor.
22. Dispensers prior to serial number CDS0019500
recharge system with 25 oz. of Type R404A re-
frigerant. Design Pressures: High 320 - Low 44
Dispensers serial number CDS0019500 - up re-
chargesystemwith22ozoftypeR404Arefrigerant.
Design Pressures: High 380 - Low 52
NOTE: The charging of the system must be done by a
licensed refrigeration repair person.
6. Disconnect the compressor wiring harness from
the compressor.
7. Remove the two #8-32 screws securing the con-
tactor mounting bracket to the dispenser base.
8. Removethecontactormountingbracket,contactor,
contactorcoverandthecompressorwiringharness
as an assembly. Set aside for reassembly.
9. Disconnect the fan leads from the main wiring
harness.
10. Remove the three #6 thread cutting screws secur-
ing the fan to the condenser shroud. Remove the
fan and set aside for reassembly.
11. Slide the compressor out the right side of the
dispenser.
12. Remove the four grommets and sleeves from
the old compressor and install them on the new
compressor.
RED from
Relay T2
WHI from
Relay T4
BLK from
Relay T-5
P1819
FIG. 17A COMPRESSOR TERMINALS
27646 122200
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SERVICE (cont.)
T4 WHI from Compressor
and Main Harness
T4 BLK from Run Capacitor
COMPRESSOR & COMPONENTS (CDS-3) (cont.)
Compressor Start Capacitor:
4
WARNING: The compressor start capacitor must be
properly discharged before proceeding.
1. Disconnect the two leads on the compressor start
capacitor.
2. Loosen the capacitor retaining strap and remove
the capacitor.
T5 BLK from Compressor
Thermal Overload Protector
and Main Harness
T1 BLK from Start Capacitor
T2 BLK from Run Capacitor
6
5
1
2
T2 Red from Compressor
3. Securelyinstallnewstartcapacitorundertheretain-
ing strap.
4. Refer to Fig. 18 and reconnect the wires to the start
capacitor.
P1820
FIG. 19 COMPRESSOR RELAY TERMINALS
Compressor Thermal Overload Protector: Refer to
FIG. 17
1. Remove terminal cover retainer (7) and terminal
cover (6).
2. Remove the wire from thermal overload protector
from the compressor wiring harness to the thermal
overload protector.
3. Removeoverloadprotectorretainer(5)andthermal
overload protector (4) as an assembly
4. Remove retainer (5) from overload protector (4)
and discard overload protector.
5. Install retainer (5) on new overload protector (2).
6. Install retainer (5) and overload protector (4) on
the compressor terminal bracket.
7. Refer to Fig. 20 and reconnect the thermal overload
protector wires.
8. Reinstall terminal cover (6) and cover retainer
(7).
Compressor Run Capacitor:
WARNING: The compressor run capacitor must be
properly discharged before proceeding.
1. Disconnect the three leads from the compressor
run capacitor.
2. Loosen the capacitor retaining strap and remove
the capacitor.
4. Securely install new run capacitor under the retain-
ing strap.
5. Refer to Fig. 18 and reconnect the wires to the
relay.
BLK to Compressor
Relay T6
BLK to Compressor
Relay T2
BLK to Compressor
Relay T1
BLK
START
RUN
P1817
FIG. 18 COMPRESSOR CAPACITOR TERMINALS
BLK to Compressor Relay T5
Compressor Start Relay
P1821
FIG. 20 THERMAL OVERLOAD PROTECTOR
WARNING: The compressor start capacitor must be
properly discharged before proceeding.
TERMINALS
1. Disconnect the wires from the compressor relay.
2. Remove the #6-32 screw securing the relay to the
rear of the component bracket.
3. Remove and discard relay.
4. Install new relay on the rear of the component
bracket and secure with a #6-32 screw.
5. Refer to Fig. 19 and reconnect the wires.
27646 122200
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SERVICE (cont.)
6. Disconnect the black wires from contactor termi-
nals #6 & #8 (#5 & #6, CDS-3 first type contac-
tor).
CONTACTOR - ELECTRONIC CONTROL
7. With ON/OFF switch in the “ON” position, connect
the dispenser to the power source and check for
continuity across terminals on contactor.
If continuity is not present as described, on CDS-3 first
type contactors, replace contactor. If continuity is not
present between terminals #6 & #8 as described on all
CDS-2 contactors and CDS-3 second type contactors,
check for continuity across terminals #2 and #4.
If continuity is present as described, disconnect the
dispenser from power source and reconnect black
wires to terminals #2 and #4, the contactor will oper-
ate properly.
R
2
If continuity is not present as described, replace the
contactor.
P1342
Removal and Replacement:
FIG. 21 CONTACTOR - ELECTRONIC CONTROL
Location:
Thecontactorislocatedinsidethedispenserchas-
sis on the lower outside of the component bracket.
1. Disconnect the wires from the contactor.
2. Remove the two #8-32 locking screws securing
the contactor to the component bracket. Remove
and discard contactor.
3. Installthenewcontactoronthecomponentbracket
using two #8-32 locking screws.
4. Refer to Fig. 22 and reconnect the wires.
Test Procedures:
1. Disconnect the dispenser from the power
source.
2. Disconnectwhite/blackwirefromcontactortermi-
nal #0 (terminal #2, on CDS-3 first type contactor)
and brown/black from terminal #1.
Terminal #0
Terminal #4
WHI/BLK from Main Harness/
Power Cord/Compressor
Terminal #2
3. With a voltmeter, check the voltage across the
white/black wire and the brown/black wire and
the ON/OFF switch in the “ON” position. Connect
the dispenser to the power source. The indication
must be:
Terminal #6
BLK from Main
Harness/Power Cord
Terminal #1
BRN/BLK from Main
Harness/Control Board
Terminal #8
BLK from Compressor
a) 120 volts ac for 120 volt models.
b) 230 volts ac for 230 volt models.
4. Disconnect the dispenser from the power
source.
Harness
ALL CDS-2 CONTACTORS
CDS-3 SECOND TYPE CONTACTORS
If voltage is present as described, proceed to #5.
If voltage is not present as described, refer to the
Wiring Diagram and check the dispenser wiring har-
ness.
5. Check for continuity across contactor terminals
#0 & #1 (#1 & #2, CDS-3 first type contactor).
If continuity is present as described reconnect the
white/black wire and the brown/black wire to the
contactor and proceed to #6.
Terminal #2
WHI/BLK from Main Harness/
Power Cord/Compressor
Terminal #1
BRN/BLK from Main
Harness/Control Board
Terminal #6
BLK from Main
Harness/Power Cord
Terminal #5
BLK from Compressor
Harness
CDS-3 FIRST TYPE CONTACTORS
FIG. 22 CONTACTOR TERMINALS
If continuity is not present as described, replace the
contactor.
P1333
27646 122200
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SERVICE (cont.)
COOLING DRUM ALIGNMENT
Ledge
Boss
Legs
P1510
FIG. 24 CHECKING ALIGNMENT
FIG. 23 COOLING DRUM SHIPPING SUPPORT
When in its proper position, the cooling drum will
cause a slight pressure on the hopper drip tray drain
hole and the two legs will be equidistant from the
hopper drip tray.
The “A” shaped Cooling Drum Shipping Supports,
removedduringInitialSet-Upshouldbekeptandused
as a tool to reset the alignment of the cooling drums
should it ever be required.
If adjustment is needed, remove the support and gently
force the free end of the evaporator in the direction
the adjustment is needed.
Symptoms:
SqueakyOperation,hopperliftsorwon’tseatproperly,
hopper is pushed to one side or the other.
Reinstall the support, check the alignment, and read-
just the cooling drums as required.
To check alignment
1. Place the “A” shaped support on the auger shaft
with the ledge under the cooling drum.
2. Liftthecoolingdrumwhilerotatingthesupportinto
a vertical position. The boss on the very bottom
will drop into the hopper drip tray’s drain hole.
27646 122200
35
SERVICE (cont.)
DAY/NIGHT SWITCH
If continuity is present as described, the day/night
switch is operating properly.
If continuity is not present as described, replace the
day/night switch.
Removal and Replacement:
1. Pull the dispenser drawer out until the drawer hits
the drawer stop. Using a screwdriver gently pry up
on the drawer stop and remove the drawer from
the dispenser.
2. Remove the four #8-32 locking screws securing
the switch panel to the drawer.
3. Lift switch panel with wires and L.E.D. board as an
assembly.
4. Turn switch panel over and remove the wires from
the DAY/NIGHT switch.
5. Compress the clips on the back of the control panel
and gently push switch through the opening.
6. Push the new switch into the opening, with the “o”
on the switch to the outside, until the clips snap
into position.
7. Reconnect the wires to the switch. Refer to Fig. 26
when reconnecting wires.
8. Position the switch panel inside the drawer and
secure with four #8-32 locking screws.
9. Reinstall drawer.
P1343
FIG. 25 DAY/NIGHT SWITCH
Location:
The DAY/NIGHT switch is located inside the dis-
penser drawer on the right front of the control panel.
Test Procedures:
1. Disconnect the dispenser from the power source.
2. Disconnect the white/green wire from the switch
and the white/black wire from contactor located on
the outside bottom of the component bracket .
3. With a voltmeter, check the voltage across the
white/green and the white/black and the ”ON/OFF“
switch in the “ON” position. Connect the dispenser
to the power source. The indication must be:
a) 120 volts ac for 120 volt models.
b) 230 volts ac for 230 volt models.
4. Disconnect the dispenser from the power source.
If voltage is present as described, reconnect the white/
black wire to the contactor and proceed to #5.
If voltage is not present as described, refer to the Wiring
Diagram and check the dispenser wiring harness.
5. Remove the white/red wire from the transformer.
6. With the DAY/NIGHT switch in the “DAY” position
check for continuity across the terminals. Continu-
ity must not be present when the switch is in the
“NIGHT” position.
P1335
FIG. 26 DAY/NIGHT SWITCH TERMINALS
27646 122200
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SERVICE (cont.)
DISPENSER ON/OFF SWITCH
Removal and Replacement:
1. Pull the dispenser drawer out far enough to expose
the four #8 -32 locking screws securing the switch
panel to the drawer.
2. Remove the four #8-32 locking screws.
3. Lift switch panel with wires and L.E.D./adjustment
board as an assembly.
4. Turn switch panel over and remove the wires from
the dispenser ON/OFF switch.
5. Compress the clips on the back of the control panel
and gently push switch through the opening.
6. Push the new switch into the opening, with the “o”
on the switch to the outside, until the clips snap
into position.
7. Reconnect the wires to the switch. Refer to Fig. 28
when reconnecting wires.
8. Position the switch panel inside the drawer and
secure with four #8-32 locking screws.
P1343
FIG. 27 ON/OFF SWITCH - DISPENSER
Location:
The dispenser ON/OFF switch is located inside
the dispenser drawer on the left front of the control
panel.
Test Procedures:
1. Disconnect the dispenser from the power source.
2. Disconnect the black wire from the switch and
white/black from contactor located on the outside
bottom of the component bracket .
3. Withavoltmeter, checkthevoltageacrosstheblack
and the white/black. Connect the dispenser to the
power source. The indication must be:
P1337
FIG. 28 DISPENSER ON/OFF SWITCH
TERMINALS
a) 120 volts ac for 120 volt models.
b) 230 volts ac for 230 volt models.
If voltage is present as described, reconnect the white/
black wire to the contactor and proceed to #5.
If voltage is not present as described, refer to the Wiring
Diagram and check the dispenser wiring harness.
5. Disconnect the white/green wire from the ON/OFF
switch.
6. With the ON/OFF switch in the “-” (“ON”) down
position check for continuity across the switch
terminals. Continuity must not be present when
the switch is “o” (“OFF”) down position.
If continuity is present as described, the ON/OFF switch
is operating properly.
If continuity is not present as described, replace the
ON/OFF switch.
27646 122200
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SERVICE (cont.)
ELECTRONIC CONTROL
Removal and Replacement:
1. Disconnect the plug from the main harness from
the connector on the electronic control.
2. Remove the two #8-32 locking screws securing
electronic control to the component bracket. Re-
move and discard the electronic control.
3. Installnewelectroniccontrolusingtwo#8-32lock-
ing screws.
4. Reconnect the plug from main harness to the con-
nector on the electronic control.
R2
2
P1342
FIG. 29 ELECTRONIC CONTROL
Location:
The electronic control is located on the outside of
the component bracket inside the chassis on the right
side.
Test Procedure:
1. Disconnect the dispenser from the power source.
2. Disconnect the plug from the main harness from
the connector on the electronic control.
3. Withavoltmeter,checkthevoltageacrossthesocket
#23 and socket #24 in the plug from the main har-
ness and “ON/OFF” switch in the “ON” position.
Connect the dispenser to the power source. The
indication must be:
a) 120 volts ac for 120 volt models.
b) 230 volts ac for 230 volt models.
4. Disconnect the dispenser from the power source.
If voltage is present as described, replace the electronic
control.
If voltage is not present as described, refer to the Wiring
Diagram and check the dispenser wiring harness.
27646 122200
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SERVICE (cont.)
FAN
1
2 3
4
5 6
7
P1342
P1345
FIG. 30 FAN
FIG. 31 FAN COMPONENTS
Location:
6. Remove speed nut (2) from the motor shaft.
7. Remove fan (3).
8. Remove silencer (4).
The fan is located inside the dispenser chassis just
in front of the condenser.
Test Procedures:
1. Condenser Shroud and Fan Assy
1. Disconnect the dispenser from the power source.
2. Disconnect the yellow and white/black wires from
the main harness to the fan leads.
3. Withavoltmeter,checkthevoltageacrosstheyellow
and the white/black wires and the “ON/OFF” switch
in the “ON” position. Connect the dispenser to the
power source. The indication must be:
a) 120 volts ac for 120 volt models.
b) 230 volts ac for 230 volt models.
4. Disconnect the dispenser from the power source.
If voltage is present as described, replace the fan.
If voltage is not present as described, refer to Wiring
Diagram and check the dispenser wiring harness.
2. Speed Nut
4. Silencer
6. Shroud/Mount
3. Fan Blade
5. Motor
7. Condenser Shroud
9. Install silencer (4) on new motor assy.
10. Install fan (3) on new motor assy.
11. Install speed nut (2) on new motor assy.
12. Using three #8-32 thread forming screws secure
new motor assy to shroud/mount (6).
13. Using three #6-32 thread cutting screw new motor
and shroud/mount to the condenser shroud (7).
14. Using two #8-32 locking screws secure condenser
shroud and fan assy (1) to the chassis base.
15. Using four #8-32 crimptite screws secure the con-
denser shroud and fan assy (1) to the condenser.
16. Refer to Fig. 32 and reconnect the leads on the new
motor to the dispenser wiring harness.
Removal and Replacement (Refer to Fig. 31)
NOTE: Leave the hopper in place. This keeps it in align-
ment while the condenser shroud is removed.
1. Disconnect the fan leads from the wiring har-
ness.
17. Use cable ties to secure wires away from fan
blades.
2. Remove the four #6 crimptite screws securing the
condensershroudandfanassy(1)tothecondenser
and the two #8-32 locking screws securing the
condenser shroud and fan assy (1) to the chassis
base.
3. Remove the condenser shroud and fan assy from
the right side of the dispenser.
4. Removethethree#6threadcuttingscrewssecuring
thefanassytocondensershroud(7).Setcondenser
shroud and screws aside for reassembly.
5. Remove the three #8-32 thread forming screws
securingmotor(5)tocondenserfanshroud/mount
(6). Set shroud and screws aside for reassembly.
BLK to Main Harness WHI/BLK
BLK to Main Harness YEL
P1326
FIG. 32 FAN MOTOR TERMINALS
27646 122200
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SERVICE (cont.)
FUSE AND FUSE HOLDER
Fuse Holder:
1. Disconnect the wires from the rear of the fuse
holder.
2. Remove nut securing the fuse holder to the com-
ponent bracket.
3. Pushfuseholderthroughtheholeinthecomponent
bracket.
4. Install new fuse holder and fuse through the hole
in the component bracket.
5. Secure the fuse holder to the component bracket.
6. Refer to Fig. 34 and reconnect the wires.
R
2
WHI/GRN from Main
Harness/ON/OFF
Switch
P1342
FIG. 33 FUSE HOLDER
Location:
The fuse holder is located inside the dispenser on
the upper left side of the component bracket just below
the circuit breaker.
Test Procedures:
WHI/GRN from Main
Harness/Control Board
1. Disconnect the dispenser from the power source.
2. Remove cap and fuse from fuse holder.
3. Remove fuse from the cap.
P1331
FIG. 34 FUSE HOLDER TERMINALS
4. Check for continuity through the fuse.
If continuity is present as described, reinstall the fuse,
the fuse is operating properly.
If continuity is not present as described, replace
fuse.
Removal and Replacement:
Fuse:
1. Remove the cap from the fuse holder.
2. Removefusefromthefuseholder, inspect, ifblown
discard.
3. Install new 5 amp fuse in the fuse holder
4. Reinstall fuse holder cap.
27646 022500
40
SERVICE (cont.)
ICE/OFF/NO ICE SWITCHES
6. With the switch to be tested pressed down on the
right side, check for continuity between the center
terminal and the left terminal. With the switch
pressed down to the left, check for continuity be-
tween the center terminal and the right terminal.
Continuity must not be present when neither side
of the switch is pressed down.
If continuity is present as described, the ICE/OFF/NO-
ICE switch is operating properly.
If continuity is not present as described, replace the
ICE/OFF/NO-ICE switch.
Removal and Replacement:
1. Pull the dispenser drawer out until the drawer hits
the drawer stop. Using a screwdriver gently pry up
on the drawer stop and remove the drawer from
the dispenser.
2. Remove the four #8-32 locking screws securing
the switch panel to the drawer.
P1343
FIG. 35 ICE/OFF/NO ICE SWITCHES
Location:
The ICE/OFF/NO-ICE switches are located inside
the dispenser drawer.
Test Procedures:
3. Lift switch panel with wires and L.E.D./adjustment
board as an assembly.
1. Disconnect the dispenser from the power source.
2. Disconnect the black wire from the switch to be
tested and white/black from contactor located on
the outside bottom of the component bracket .
3. Withavoltmeter, checkthevoltageacrosstheblack
wire and the white/black wire and all other switches
in the down position (“ON”) to the center of the
control panel. Connect the dispenser to the power
source. The indication must be 5 volts dc.
4. Turn switch panel over and remove the wires from
the ICE/OFF/NO-ICE switch that is to be replaced.
5. Compress the clips on the back of the control panel
and gently push switch through the opening.
6. Push the new switch into the opening until the clips
snap into position.
7. Reconnect the wires to the switch. Refer to Fig. 36
when reconnecting wires.
4. Disconnect the dispenser from the power source.
If voltage is present as described, reconnect the white/
black wire to the contactor and proceed to #5.
If voltage is not present as described, refer to the Wiring
Diagram and check the dispenser wiring harness.
5. Remove the white/yellow wire and the white/violet
wire from the right ICE/OFF/NO-ICE switch, the
white/orange wire and the red/black from the left
ICE/OFF/NO-ICEswitch,orthebrown/blackwireand
blue wire from the center ICE/OFF/NO-ICE switch.
8. Position the switch panel inside the drawer and
secure with four #8-32 locking screws.
P1334
FIG. 36 ICE/OFF/NO ICE SWITCH TERMINALS
27646 122200
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SERVICE (cont.)
LAMP CORD ASSY
7. Strip the wires from the lamp holder/socket as-
sembly approximately .375”.
8. Using the two wire nuts, supplied, connect the new
lamp cord assembly to the lamp holder/socket as-
sembly wires.
9. Reinstall the hopper liner to the bottom of the hop-
per cover.
10. Reinstall the hopper cover to the hopper.
11. Plug in the new lamp cord assembly to the lamp
cord connector assembly on left top of the auger
motor cover.
12. Refer to Fig. 38 when reconnecting the wires.
P1343
FIG. 37 LAMP CORD ASSY
Location:
The lamp cord assembly is located in the left top
of the auger motor cover.
Test Procedures:
1. Disconnect the dispenser from the power source.
2. Unplug the lamp cord assembly from lamp cord
connector assembly.
3. Check for continuity across the tip of the cord as-
sembly and the housing. Continuity must not be
present when both lamps are removed.
P1332
FIG. 38 LAMP CORD WIRES
If continuity is present as described, the cord assembly
is operating properly.
If continuity is not present as described, replace the
cord assembly.
Removal and Replacement:
1. Disconnect the lamp cord assembly from the lamp
cord connector assembly in the top of the auger
motor cover.
2. Remove the hopper cover with the lamp cord as-
sembly from the hopper.
3. Remove hopper cover liner from the hopper
cover.
4. Cut the closed splice terminals connecting lamp
cord assembly to the lamp holder/socket assembly
off.
5. Remove lamp cord assembly from hopper cover
and discard.
6. Push new lamp cord wires through the holes on
the left outside top of the hopper cover.
27646 122200
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SERVICE (cont.)
LAMP CORD CONNECTOR
If continuity is not present when lamp cord assembly
is connected or continuity is present when lamp cord
assembly is not connected, replace the lamp cord
connector.
Removal and Replacement:
1. Disconnect the lamp cord assembly from the lamp
cord connector.
2. Remove the two #8-32 locking screws securing the
augermotorcovertheaugermotorbracket/cooling
drum bracket. Move cover back far enough to gain
access to the lamp cord connector.
3. Disconnect the lamp cord connector wires from
the dispenser main wiring harness.
4. Remove nut and washer securing the lamp cord
connector to the auger motor cover and discard
nut, washer and lamp cord connector.
5. Remove new nut and washer from new lamp cord
connector.
6. Push new lamp cord connector through the hole
in the auger motor cover and secure with the new
nut and washer.
7. Reconnect the wires on the cord connector to the
dispenser main wiring harness.
P1343
FIG. 39 LAMP CORD CONNECTOR
Location:
The lamp cord connectors are located inside the
upper left side of the auger covers.
Test Procedures:
1. Disconnect the dispenser from the power source.
2. Disconnect the plug on the dispenser main harness
from the connector from the lamp cord connec-
tor.
3. With a voltmeter, check the voltage across the two
pinholesonthemainharnessplug andDAY/NIGHT
switch “-” in the down position and the ON/OFF
switch in the “ON” position. Connect the dispenser
to the power source. The indication must be ap-
proximately 12.6 volts dc.
8. Positionaugermotorcoveronaugermotorbracket/
cooling drum bracket and secure with two #8-32
locking screws.
9. Refer to Fig. 40 when reconnecting wires.
4. Disconnect the dispenser from the power source.
If voltage is present as described, proceed to #5.
If voltage is not present as described, refer to the
Wiring Diagram and check the dispenser main wiring
harness.
NOTE: Lamp cord assembly (Fig. 37) and lamps, must
be tested and determined to be functioning properly
before proceeding to step 5.
5. Check for continuity across the black wire pin and
red wire pin of the lamp cord connector (Fig. 40).
Continuity must be present when the lamp cord
assembly is connected and must not be present
when lamp cord assembly is disconnected from
lamp cord connector.
BLK to Main Wiring Harness
RED to Main Wiring Harness
P1323
FIG.40 LAMP CORD CONNECTOR
27646 122200
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SERVICE (cont.)
LAMP HOLDER/SOCKET ASSEMBLY
Removal and Replacement:
1. Disconnect the lamp cord assembly from the lamp
cord connector assembly in the top of the auger
motor cover.
2. Remove the hopper cover with the lamp cord as-
sembly from the hopper.
3. Remove hopper cover liner from the hopper
cover.
4. Cutofftheclosed-endsplicesconnectinglampcord
assembly to the lamp holder/socket assembly.
5. Remove the two lamps.
6. Remove the two #2-56 screws and elastic lock
nuts securing the lamp holder/socket assembly to
the mounting bracket. Remove lamp holder/socket
assembly and discard.
7. Installnewlampholder/socketassemblyonmount-
ingbracketusingtwo#2-56screwsandelasticlock
nuts.
8. Reinstall lamps.
9. Strip the wires from the lamp cord assembly ap-
proximately .375”.
10. Using the two wire nuts, supplied, connect the
lamp cord assembly to the new lamp holder/socket
assembly wires.
11. Reinstall the hopper liner to the bottom of the hop-
per cover.
12. Reinstall the hopper cover to the hopper.
13. Plug in the lamp cord assembly to the lamp cord
connector assembly on left top of the auger motor
cover.
FIG. 41 LAMP HOLDER/SOCKET ASSEMBLY P1343
Location:
The lamp holder/socket assemblies are located
inside the hopper covers.
Test Procedures:
1. Disconnect the lamp cord assembly from the lamp
cord connector.
2. Remove the lamps from the lamp holder/socket
assembly.
3. With a voltmeter, check the voltage across the pin
sockets in the plugs with the DAY/NIGHT switch in
the“-”downpositionandON/OFFswitchinthe“ON”
position. Reconnect the lamp cord to the lamp cord
connector. The indication must be approximately
12.6 volts dc.
14. Refer to Fig. 42 when reconnecting the wires.
4. Disconnect the lamp cord from the lamp cord con-
nector.
If voltage is present as described, the lamp holder/
socket assembly is operating properly.
If voltage is not present as described, replace the lamp
holder/socket assembly.
5. Check for continuity across the terminals on the
lamps.
If continuity is present as described, the lamps are
operating properly.
P1322
FIG. 42 LAMP HOLDER/SOCKET ASSEMBLY
If continuity is not present as described, replace the
lamp.
WIRES
27646 122200
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SERVICE (cont.)
L.E.D./ADJUSTMENT BOARD
3. Lift switch panel with wires and L.E.D. /adjust-
ment
board as an assembly and turn over.
4. Disconnect the connector on the dispenser wiring
harness from the pin connector on the rear of the
L.E.D./adjustment board.
5. Remove the #4 keps nut from the right rear stud
on the control panel and remove the green ground
wire.
6. Remove the remaining five #4 keps nuts from the
studs on the control panel.
7. Remove the #6 stainless steel washer and the #6
nylon washer from the front stud on the control
panel.
8. Remove board and discard.
9. Position a new board on the studs and spacers.
10. Install the #6 nylon washer and the #6 stainless
steel washer on the front stud of the control panel.
Be sure the nylon washer is installed first.
11. Secure the new board to the control panel using
five #4 keps nuts.
12. Connect the green lead from the dispenser main
harness to the right rear stud of the control panel
and secure with a #4 keps nut.
13. Reconnect the connector from the dispenser main
wiring harness to the pin connector at the rear of
new L.E.D./adjustment board.
14. Turn board and panel over and position in the dis-
penser drawer and secure with four #8-32 locking
screws.
P1343
FIG. 43 L.E.D./ ADJUSTMENT BOARD
Location:
The L.E.D./adjustment board is located in the dis-
penser drawer attached to the bottom of the control
panel.
Test Procedures:
1. Disconnect the dispenser from the power source.
2. Disconnect the connector at the rear of the L.E.D./
adjustment board from the dispenser main wiring
harness.
3. Withavoltmeter,checkthevoltagebetweenpinhole
#1 (black wire) and pin hole #8 (pink wire) with
the ON/OFF switch in the “ON” position. Connect
the dispenser to the power source. The indication
must be 5 volts dc.
4. Disconnect the dispenser from the power source.
If voltage is present as described, replace the L.E.D./
adjustment board.
If voltage is not present as described, refer to the Wiring
Diagram and check the dispenser wiring harness.
Removal and Replacement:
1. Pull the dispenser drawer out far enough to expose
the four #8 -32 locking screws securing the switch
panel to the drawer.
2. Remove the four #8-32 locking screws.
27646 122200
45
SERVICE (cont.)
SOLENOIDS
7. Disconnect the dispenser from the power source.
If the sound is heard as described and the refrigerant
will not pass through the solenoid valve, there may be
a blockage in the refrigerant line before the solenoid
valve, or the solenoid valve may require inspection for
wear, and removal of particles.
If the sound is not heard as described, replace the
solenoids.
Removal and Replacement:
R
2
NOTE: Before removal of any refrigeration component
the refrigerant in the system must be reclaimed by a
licensed refrigeration repair person.
1. Disconnect the wires from both solenoids.
2. Disconnect the refrigerant lines from the solenoids
to the cooling drums and the refrigerant line from
the accumulator.
P1342
FIG. 44 SOLENOIDS
Location:
The solenoids are mounted on a bracket that is
attached on top of the chassis on the left side.
3. Remove the #6 hex crimptite securing solenoid
bracket to the dispenser chassis.
4. Remove bracket and solenoids from the chassis
assembly.
5. Remove the four #8-32 locking screws securing
the solenoids to the bracket.
6. Remove solenoid and repair or discard.
7. Install new solenoid on mounting bracket using
four #8-32 locking screws.
8. Reinstallmountingbracketandsolenoidsinsidethe
dispenser chassis, securing with a #6 hex crimptite
screw.
9. Reconnect the tubes from the accumulator and the
cooling drums.
10. Refer to Fig. 45 and reconnect the wires.
11. Evacuate the system.
12. Recharge the system with the appropriate coolant
and to the pressures directed on the decals
Test Procedures:
1. Disconnect the dispenser from the power source.
2. Disconnect the white/black wire from the solenoid
to be tested and the orange wire from the left sole-
noid, the violet wire from the right solenoid or the
white/violet wire from the center solenoid.
3. With a voltmeter, check the voltage across the
white/blackwireandtheotherwirewiththeON/OFF
switch in the “ON” position and the appropriate
ICE/OFF/NO-ICE switch in the “ICE” or “NO-ICE”
position.Connectthedispensertothepowersource.
The indication must be:
a) 120 volts ac for 120 volt models.
b) 230 volts ac for 230 volt models.
4. Disconnect the dispenser from the power source.
If voltage is present as described, proceed to #5
If voltage is not present as described, refer to the
Wiring Diagram and check the dispenser main wiring
harness.
5. Check for continuity across the solenoid valve coil
terminals.
NOTE: The charging of the system must be done by a
licensed refrigeration repair person.
If continuity is present as described, reconnect the
wires to the solenoid.
If continuity is not present as described, replace the
solenoids.
6. Check the solenoid valve for coil action. Connect
the dispenser to the power source. With the auger
motor switch in the “ON” position and the ON/
OFF/ICE switch in the “ICE” or “NO-ICE” position
press the ON/OFF switch to the “ON” position. After
approximately two minutes listen carefully in the
vicinity of the solenoid valve for a “clicking” sound
as the coil magnet attracts.
P1327
FIG.45 SOLENOID TERMINALS
46
27646 122200
SERVICE (cont.)
TEMPERATURE SENSOR
Removal and Replacement:
1. Remove the two #8-32 securing the auger motor
cover to cooling drum mount and remove the
cover. Set aside for reassembly.
2. Disconnect the plug on the temperature sensor
leads from the connector on the dispenser main
wiring harness.
3. Pull the temperature sensor from the tube at the
top rear of the cooling drum and discard.
4. Push new temperature sensor into the tube at the
top rear of the cooling drum as far as it will go.
5. Refer to Fig. 47 and reconnect the wires.
6. Positionaugermotorcoveroncoolingdrummount
and secure with two #8-32 locking screws.
P1341
FIG. 46 TEMPERATURE SENSOR
Location:
The temperature sensors are located inside the
top rear of the cooling drum under the auger motor
covers.
Test Procedures:
1. Position the DAY/NIGHT switch in the “NIGHT”
position, check the L.E.D. on the control panel for
flashes.
2. The L.E.D. for the temperature sensor is located
between the appropriate auger switch and the ice
switch.
3. If the temperature in the cooling drum is less
than 20° F (-6˚C) or more than 120°F (73˚C) for
10 seconds the L.E.D. will flash twice every four
seconds.
P1325
FIG. 47 TEMPERATURE SENSOR
4. If flashing is present as described, replace the
temperature sensor.
NOTE: Auger motor cover must be in place to give a
correct reading.
47
27646 122200
SERVICE (cont.)
TORQUE SENSOR CIRCUIT BOARD
6. Remove motor with mounting bracket, drip tray,
splitpinandtorsionspringbearingsasanassembly
and set aside for reassembly.
NOTE: When removing or installing the motor be sure
the split pin in the motor shaft is turned to a position
that will clear the torque sensor circuit board.
7. Disconnecttheplugfromthedispensermainwiring
harness to the torque sensor circuit board.
8. Removethe#8-32lockingscrewandwashersecur-
ing torque sensor circuit board to the cooling drum
mount.
9. Remove torque sensor circuit board and discard.
10. Install new torque sensor circuit board in the slot
in the rear of the cooling drum mount and secure
with a #8-32 locking screw and washer.
P1341
FIG. 48 TORQUE SENSOR CIRCUIT BOARD
Location:
The torque sensor circuit board is located on the
rear of the cooling drum mount just left of center.
11. Refer to Fig. 49 and reconnect the wires.
12. Reinstall motor with mounting bracket, drip tray,
split pin and torsion spring bearings using three
#8 locking screws onto the cooling drum bracket.
Test Procedures:
1. With the ON/OFF switch and Auger switch in the
“ON” position and the ICE/OFF/NO-ICE switch in
the “ICE” position check the L.E.D. on the control
panel.
13.
Install the auger motor capacitor on the lower
right side of the auger mounting bracket using the
remaining #8 locking screw.
2. The L.E.D. for the torque sensor is located between
the appropriate auger switch and the ice switch.
3. If the L.E.D. flashes one time every four seconds
the auger is not turning. If the L.E.D. flashes three
times every four seconds the torque is less than
possible. If the L.E.D. flashes four times every four
seconds the torque is greater than possible.
4. IftheL.E.D. flashesthreetimeseveryfourseconds,
four times every four seconds or one time every
four seconds with the auger turning, replace the
torque sensor circuit board.
14. Connect the auger motor terminal to the terminal
on the main wiring harness.
15. Refer to Fig. 49 when reconnecting the wires.
16. Position the auger motor cover on the cooling
drum mount and secure with two #8-32 locking
screws.
Removal and Replacement:
1. Remove the two #8-32 locking screws securing the
auger motor cover to the cooling drum mount.
2. Remove the cover and set aside for reassembly.
3. Remove the #8 locking screw on the lower right
side of the auger motor mounting bracket securing
the auger motor run capacitor. Set capacitor aside
with wires attached.
P1328
FIG. 49 TORQUE SENSOR CIRCUIT
4. Disconnecttheaugermotorplugfromtheconnector
on the main wiring harness.
BOARD TERMINALS
5. Remove the three remaining #8 locking screws
securing the auger motor mounting bracket to
cooling drum mounting bracket.
27646 122200
48
SERVICE (cont.)
TRANSFORMER
8. With a voltmeter, check the voltage across the in-
side of lamp cord socket and the outside with the
DAY/NIGHT switch in the “-” down position. The
indication must be approximately 12.6 volts dc.
9. Disconnect the dispenser from the power source.
If voltage is present as described, the transformer is
operating properly.
If voltage is not present as described, replace the
transformer.
Removal and Replacement:
1. Remove the four #8-32 locking screws securing
the component bracket to the chassis.
R
2
2. Pullcomponentbracketfromthechassisfarenough
to gain access to the transformer.
3. Disconnect the connector from the dispenser main
wiring harness from the plug on the transformer.
4. Remove the four #8-32 locking screws securing
the transformer to the component bracket.
5. Remove transformer and discard,
6. Positionnewtransformeronthecomponentbracket
and secure with four #8-32 locking screws.
7. Reconnect the plug on the transformer to the con-
nector on the dispenser wiring harness.
P1342
FIG. 50 TRANSFORMER
Location:
Thetransformerislocatedinsidethechassisonthe
upper rear side of the component bracket.
Test Procedures:
1. Disconnect the dispenser from the power source.
2. Disconnect the plug from the transformer to the
connector from the dispenser main wiring har-
ness.
8. Refer to Fig. 51 and reconnect the wires.
9. Position component bracket in the chassis and
secure with four #8-32 locking screws.
3. With a voltmeter, check the voltage across the
white/red wire and the white/black wire in the dis-
penser main wiring harness connector. Connect
the dispenser to the power source. The indication
must be:
a) 120 volts ac for 120 volt models.
b) 230 volts ac for 230 volt models.
4. Disconnect the dispenser from the power source.
If voltage is present as described, proceed to #5.
If voltage is not present as described, refer to the
Wiring Diagram and check the dispenser main wiring
harness.
5. Reconnecttheplugfromthetransformertothecon-
nector from the dispenser main wiring harness.
6. Connect the dispenser to the power source.
7. Disconnect the lamp cord from the lamp cord con-
nector.
P1329
FIG. 51 TRANSFORMER TERMINALS
27646 122200
49
SERVICE (CONT.)
VOLTAGE DIVIDER (PAF Models only)
5. With a voltmeter, check voltage between J4 pin 3
and J4 pin 23 of the control board. Connect the
dispenser to the power source; set the main power
switch to “ON” position; set the DAY/NIGHT switch
to “DAY” position. The indication must be 12 volts
ac.
Location:
The voltage divider is located in the wiring har-
ness, inside the chassis near the upper rear side of
the component bracket.
Test proceedures:
If voltage is present as described, the voltage divider
is operating properly.
If voltage is not present as described, replace the volt-
age divider.
1. Disconnect the dispenser from the power source.
2. Disconnect the four-pin plug of the main harness
from the four-pin plug on the voltage divider.
3. With a voltmeter, check voltage across the white/
red wire (pin 1) and the white/black wire (pin 2) at
the plug on the main wiring harness. Connect the
dispenser to the power source; set the main power
switch to “ON” position; set the DAY/NIGHT switch
to “DAY” position. The indication must be:
a) 120 volts ac for 120 volt 2 wire models.
b) 230 volts ac for 230 volt 2 wire models.
P2268
FIG. 52 VOLTAGE DIVIDER
4. Disconnect the dispenser from the power source.
If voltage is present as described, reconnect the plug
and connector and proceed to step 5.
Ifvoltageisnotpresentasdescribed,refertotheWiring
Diagrams and check the main wiring harness.
27646 122200
50
COOLANT SCHEMATIC DIAGRAM CDS-2
27646 022500
51
COOLANT SCHEMATIC DIAGRAM CDS-3
(Prior to S/N CDS 0019500)
27646 022500
52
COOLANT SCHEMATIC DIAGRAM CDS-3
(S/N CDS 0019500 - Up)
27646 022500
53
27646 022500
54
27646 022500
55
SCHEMATIC WIRING DIAGRAM FOR CDS-2 PAF
COMPRESSOR ASSEMBLY
L1
N
K2-3
K2-2
GRN
LIMIT
THERMOSTAT
K2-5
BLK
BLK
WHI/BLK
WHI/BLK
COMP.
K2
K1-8 K1-6
K2-1
WHI/BRN
or VIO
BLK
BLK
ON/OFF SW.
RED
LT. AUGER SW.
RT. AUGER SW.
1
BLK
RED
WHI
WHI/GRN
WHI/GRN
WHI/BRN
WHI/BLK
M
LEFT
AUGER
4
WHI/GRN
WHI/GRN
WHI/BLU
5
AMP
1
BLK
RED
WHI
DAY/NIGHT
TIMER
WHI/BLU
WHI/BLK
M
WHI/GRN
5
4
3
2
1
RIGHT
AUGER
DAY/NIGHT SW.
4
BLK
WHI/RED
WHI/RED
WHI/RED
WHI/BLK
WHI/RED
WHI/BLK
RED-22
BLK-22
1
BLK
WHI/BLK
RED
Voltage
Divider
WHI/GRN
BLK-22
RED-22
VIO-22
WHI/BLK
A
D
J
U
S
T
M
E
N
T
1
5
9
4
WHI/BLK
WHI/BLK
WHI/RED
WHI/RED
B
O
A
R
D
WHI/BLK
WHI/RED
WHI/RED
YEL-22
GRN-22
PNK-22
ORA-22
GRN
GRN
YEL-22
VIO-22
RED-22
BLK-22
BLU-22
PNK-22
BLK-22
GRY-22
PNK-22
BLK-22
J4-1
J4-5
1
1
LEFT
TORQUE
SENSOR
RIGHT
TORQUE
SENSOR
C
O
N
T
R
O
L
PNK-22
t°
GRY-22
BLU-22
RED-22
GRN-22
ORA-22
BLK-22
BLK-22
1
BLK
BLK
LEFT
WHI/GRN-22
BLK-22
WHI/VIO-22
t°
RIGHT
1
BLK
BLK
B
O
A
R
D
J4-10
J4-15
J4-20
WHI/BLK
WHI/BLK
WHI/BLK
WHI/BLK
FAN
PNK-22
RED/BLK
WHI/ORA
WHI/GRN-22
WHI/VIO
WHI/YEL
WHI/VIO-22
YEL
K1
LEFT
RIGHT
0
1
RIGHT
SOL
ICE/OFF/NO-ICE
SWITCHES
LEFT
SOL
BLK-22
BLK-22
BRN/BLK
VIO
ORA
WHI/BLK
WHI/GRN
WHI/BLK
J4-24
LEFT SPRING
CONTACT
RIGHT SPRING
CONTACT
120 VOLTS AC
2 WIRE
SINGLE PHASE
60 HZ
GRN
GRN
GRN
GRN
27646 022500
56
SCHEMATIC WIRING DIAGRAM FOR CDSA-2 PAF
GRN/YEL
L2
L1
BRN
BLK
BLU
WHI
EMI
FILTER
COMPRESSOR ASSEMBLY
LIMIT
THERMOSTAT
WHI/BLK
BLK
BLK
WHI/BLK
K1-8 K1-6
WHI/BRN
or VIO
BLK
BLK
ON/OFF SW.
RED
LT. AUGER SW.
RT. AUGER SW.
1 BLK
RED
WHI/GRN
WHI/GRN
WHI/BRN
WHI/BLK
M
WHI
LEFT
AUGER
4
WHI/GRN
WHI/GRN
WHI/BLU
5
AMP
1 BLK
RED
DAY/NIGHT
TIMER
WHI/BLU
WHI/BLK
M
WHI/GRN
DAY/NIGHT SW.
WHI/RED
WHI
5
4
3
2
1
RIGHT
AUGER
4
BLK
WHI/RED
WHI/RED
WHI/BLK
WHI/RED
WHI/BLK
RED-22
BLK-22
1
BLK
WHI/BLK
RED
Voltage
Divider
WHI/GRN
BLK-22
RED-22
VIO-22
WHI/BLK
A
D
J
1
5
9
4
WHI/BLK
WHI/BLK
WHI/RED
WHI/RED
B
O
A
R
D
U
S
T
M
E
N
T
WHI/BLK
WHI/RED
WHI/RED
YEL-22
GRN-22
PNK-22
ORA-22
GRN
GRN
YEL-22
VIO-22
RED-22
BLK-22
BLU-22
PNK-22
BLK-22
GRY-22
PNK-22
BLK-22
J4-1
1
1
LEFT
TORQUE
SENSOR
RIGHT
TORQUE
SENSOR
C
O
N
T
R
O
L
PNK-22
t°
J4-5
GRY-22
BLU-22
RED-22
GRN-22
ORA-22
BLK-22
BLK-22
1 BLK
BLK
LEFT
WHI/GRN-22
BLK-22
WHI/VIO-22
t°
RIGHT
1 BLK
BLK
B
O
A
R
D
J4-10
J4-15
J4-20
WHI/BLK
WHI/BLK
WHI/BLK
WHI/BLK
FAN
PNK-22
RED/BLK
WHI/ORA
WHI/GRN-22
WHI/VIO
WHI/YEL
WHI/VIO-22
YEL
K1
LEFT
RIGHT
0
1
RIGHT
SOL
ICE/OFF/NO-ICE
SWITCHES
LEFT
SOL
BLK-22
BLK-22
BRN/BLK
VIO
ORA
WHI/BLK
WHI/GRN
WHI/BLK
J4-24
LEFT SPRING
CONTACT
RIGHT SPRING
CONTACT
230 VOLTS AC
2 WIRE
SINGLE PHASE
50 HZ
GRN
GRN
GRN
GRN
27646 022801
57
27646 022500
58
27646 022500
59
27646 022500
60
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