JDF-2S, JDF-4S
JDF-4D, JDF-4SB
SERVICE & REPAIR MANUAL
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
To ensure you have the latest revision of the Operating Manual, or to view the Illustrated Parts
Catalog, Programming Manual, or Service Manual, please visit the Bunn-O-Matic website, at
manual updates. For Technical Service, contact Bunn-O-Matic Corporation at 1-800-286-6070.
49179.0000C 02/14 ©2013 Bunn-O-Matic Corporation
INTRODUCTION
Safety first!
To avoid electrical shock, unplug dispenser from power source before servicing inside.
Basic Maintenance
In order to maintain proper machine operation, a Preventative Maintenance schedule must be performed on a
regular basis.
The following procedures pretain to all versions in the JDF family of machines unless otherwise noted.
CONTENTS
Warranty ...................................................................................................................................2
User Notices .............................................................................................................................3
Site Preparation .......................................................................................................................3
Preventive Maintenance
Recommended Daily Cleaning ...........................................................................................4
Preventive Maintenance Schedule.......................................................................................5
Troubleshooting........................................................................................................................6
Service....................................................................................................................................12
Electrical Schematics..............................................................................................................50
USER NOTICES
All notices on this equipment are written for your protection. All notices are to be kept in good condition.
Replace any unreadable or damaged labels.
SITE PREPARATION
A minimal clearance is required between the dispenser sides and the wall or another appliances.For optimum
performance, do not allow warm air from surrounding machines blow on the JDF dispenser. Leave some space
so the dispenser can be moved for cleaning.
49179 110613
3
Recommended Daily Cleaning Instructions
The use of a damp cloth rinsed in any mild, non-abrasive, liquid detergent is recommended for cleaning all surfaces on Bunn-O-Matic
equipment. Do NOT clean this equipment with a water jet device.
1. Open dispenser door. Lift up on 2. Close door, place an empty con- 3. Dispense from each station un-
product containers to discon-
nect them from the machine in-
let.
tainer under the dispense noz-
zles.
til clear water flows from the
dispense nozzle.
4. Open dispenser door and recon-
nect all product containers.
5. Remove dispense nozzles and 6. With a warm/soapy cloth, wipe
drip tray. Wash all parts in warm
soapy water.
down interior of cabinet and
splash panel area behind dis-
pensing nozzles.
7. Replace drip tray and dispense
nozzles.
8. Dispense from each station un-
til finished product flows from
the dispense nozzles.
49179 110613
4
REQUIRED REGULAR MAINTENANCE:
When performing Daily-Weekly Cleaning procedures, inspect o-rings, seals, and bushings for signs of wear or
damage and replace immediately.
Check and/or replace every 6 months or as required:
39690.0000
28755.1011
Pump Tube Replacement Kit (Includes items indented below)
Tube, Norprene .25" ID x 17.0" lg
Clamp .39"/.48"
32732.0000
32656.0000
21275.0003
34325.0032
Fitting, Elbow .25" Barb x .38" Barb
Clamp .57"/.70"
Hose, Flex .38" ID x 5.25" lg
49179 110613
5
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 high voltage ac and 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.
•
•
Solenoid removal requires interrupting the water supply to the valve. Damage may result if solenoids are
energized for more than ten minutes without a supply of water.
The use of two wrenches is recommended whenever plumbing fittings are tightened or loosened. This will
help to avoid twists and kinks in the tubing.
•
•
Make certain that all plumbing connections are sealed and electrical connections tight and isolated.
This unit is heated at all times. 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
PROBLEM
PROBABLE CAUSE
REMEDY
Cold Water Circulation
1. Cabinet cooling fan.
Replace fan (24vdc).
Note: Fan receives power when the
dispenser is powered.
Dispense stations not working.
Note: Cooling failure or excessive
cabinettemperaturesformorethan4
hours will result in dispense lockout 2. Bath recirculation pump.
or no dispense.
Note: Reset fault/timer by unplug-
ging unit.
A) If not running, check refrigeration
switch and wiring for proper conti-
nuity.
B) Check for 120V or 230V AC at
pump. Replace pump.
3. Restricted water flow to cabinet Check for kinked hose.
water coil and bath.
49179 110613
6
TROUBLESHOOTING (Continued)
PROBLEM
PROBABLE CAUSE
1. Compressor ON/OFF switch.
REMEDY
Refrigeration
Dispense stations not working.
Note: Cooling failure or excessive
Checkfor"ON"positionornocontinu-
ity - replace switch.
bath and cabinet temperatures for 2. Dirty condenser filter or fins.
more than 4 hours will result in dis-
pense lockout or no dispense.
Clean filter and fins or replace con-
denser filter. (Filter not supplied on
some machines).
3. Condenser fan not running.
A) Check for 120V or 230V AC. Re-
place fan motor or check fan blades
for obstructions.
B) Check compressor LED on circuit
board. If ON, relay coil should have
power (120 or 230 VAC).
4. Compressor relay not activating. Check compressor relay coil for 120
or 230vac.
NOTE: Always check power with
coil attached. If compressor LED is
ON and no 120 or 230vac - replace
board. Ifyes, 120or230vac-replace
relay.
Note: Relay contacts are normally
open.
5. Compressor not running.
Check compressor thermal overload
(N/C). If open check for dirty con-
denser filter or adequate ventilation
and space around machine.
6. Compressor running and not Check refrigeration system for leaks
cooling. and proper charge.
Dispenser Locked Out
Dispense stations not working.
1. Check Dispense Lockout switch. (A) Set switch to ON position.
(B) Check switch and harness for
proper continuity.
Cooling system failure.
1. Refrigeration or cold water recir- Check all previous items that pretain
culation system.
to refrigeration or cold water recir-
culation
49179 110613
7
TROUBLESHOOTING (Continued)
PROBLEM
PROBABLE CAUSE
REMEDY
Dispense station not working
1. Dispense Lockout switch set to
OFF position.
Place switch in ON position.
2. Dispense switch failed
Check switch and harness for proper
continuity.
All stations dispense concentrate Main water supply
only
Check for ON position.
Frozen bath
A)Compressorrelay/contactsshort-
ed - replace relay.
B) Recirculating pump - replace or
check for kinked flex line.
Inlet water valve failed
A) Check for 120V or 230V power
when dispensing. If yes, replace
valve. Ifno, checkharnessforproper
continuity.Thenreplacecircuitboard
if needed.
49179 110613
8
TROUBLESHOOTING (Continued)
PROBLEM
PROBABLE CAUSE
REMEDY
Dispense station
concentrate only
Water solenoid
Replace solenoid (24vdc) or check
wireconnectionbetweenwatervalve
and main control board.
Dispense station
water only
Concentrate out
Replace refill concentrate container
or BIB
Product pump not pumping
Check for proper counterclockwise
rotation of pump rollers. If coun-
terclockwise, replace pump tubing.
If clockwise, wire connection to
pump is reversed. Switch wires on
terminals.
Pump not turning
A) Check speed setting on circuit
board and increase speed (turn
clockwise)
B) Check for d.c. power to pump
motor. If yes, replace motor assy. If
no, check harness for proper conti-
nuity. Then replace circuit board if
needed.
49179 110613
9
TROUBLESHOOTING (Continued)
PROBLEM
PROBABLE CAUSE
REMEDY
Water leak filling drip tray or around 1. Initial fill/setup
dispense deck area
Some expansion normal. May fill
drip tray during initial ice block
formation
2. Dispense deck
Inspect or replace fittings clamps,
o-rings, solenoids and quick discon-
nect fittings.
NOTE: Dispense deck area slopes
to drain tube that leads to the drip
tray.
3. Water pressure greater than Install water pressure regulator and
100psi
reduce to 50 psi.
Water leaking beneath machine
1. Bath tank overflow.
A) Check all internal water connec-
tions.
B) Check internal plumbing connec-
tions.
2. Condensation from cabinet cool- Check for routing of condensation
ing coil. tube to water bath.
Erratic spray during dispense
Dispense nozzle dripping water
Dispense nozzle mixer missing or Replace mixer.
broken
Dispense solenoid.
Replace dispense deck solenoid.
49179 110613
10
TROUBLESHOOTING (Continued)
PROBLEM
PROBABLE CAUSE
REMEDY
Unit is not working
1. Step-down transformer.
2. Main control board.
Check for 120/24 or 230/24 vac. If
no24vacreading,replacestep-down
transformer.
If 24 vac present and no LED’s lit,
replace control board..
Difficulty brixing and/or weak bever- 1. Product viscosity or too cold.
age
Thoroughthawofproductbeforeuse
(35° - 40°)
2. Low water pressure.
Maintain 20 psi or higher and a mini-
mum flow rate of 1 fl oz/sec.
3. High water pressure.
Over 100 psi, install a pressure regu-
lator and set to 50 psi.
4. Dispense valve adjustment set- A) Perform 3 second water dispense
ting.
test. Factory setting is 1.0 oz/sec.
Acceptable water flow rate is .-0.8
to 1.5 oz/sec depending on the mix
ratio (4+1).
B) Adjust water to proper mix ratio.
Oncewaterisset,adjustmotorspeed
to achieve brix %.
5. Brix ratio.
Check for proper brix ratio per prod-
uctusingTotalDispensemethodand
or refractometer method.
Difficulty brixing and/or weak bever- 1. Pump tubing.
age
Inspect, clean, or replace tubing
and pump rotor/rollers for ease of
rotation.
2. Use of portable water pump.
A)Followplumbingrequirementsfor
pressure and flow rate.
B) Source another portable pump
or water supply that meets require-
ments.
Difficulty brixing bag-in-box
Vacuum leak
Inspect all lines and connections
from bag-in-box connector to bottle
adapter assembly.
49179 110613
11
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
problem.
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 opening the door, removal of the door panels, dispenser top covers,
hopper(s), hopper support plate, splash guard, splash panel w/drip tray, lower front access panel and rear ac-
cess cover.
Refer to the contents listing for component location.
INDEX
Access Panels..................................................................................................................................13
Dispense Platform Removal.............................................................................................................14
Ballast..............................................................................................................................................15
Cabinet Fan ......................................................................................................................................16
Compressor .....................................................................................................................................17
Compressor Switch..........................................................................................................................23
Condenser Fan.................................................................................................................................24
Control Board (Main) .......................................................................................................................25
Control Board (Portion Control Models) ..........................................................................................26
Circulation Pump .............................................................................................................................29
Dispense Platform Switch................................................................................................................30
Dispense Pump................................................................................................................................31
Dispense Motor................................................................................................................................32
Dispense Valve.................................................................................................................................33
Dispense Switches...........................................................................................................................34
Cold Water Dispense Switch............................................................................................................35
Dispense Membrane Switches.........................................................................................................36
Cold Water Membrane Switch..........................................................................................................37
EMI Filter..........................................................................................................................................38
Lamp................................................................................................................................................39
Lamp Holder ....................................................................................................................................39
LED Lamp ........................................................................................................................................40
Rectifier ...........................................................................................................................................41
Relay................................................................................................................................................42
Resistor ...........................................................................................................................................43
Solenoid (Cold Water)......................................................................................................................44
Solenoid (Inlet) ................................................................................................................................45
Temperature Probe...........................................................................................................................46
Temperature Sensor.........................................................................................................................47
Transformer .....................................................................................................................................48
Transformer-Lited Doors..................................................................................................................49
Circuit Board Triac Map....................................................................................................................50
Schematic Wiring Diagrams.............................................................................................................51
49179 012214
12
SERVICE(CONT.)
ACCESS PANELS
Location:
All access panels are similar through the whole JDF family (JDF-4S shown). Before removing panels, make
sure power is OFF to the machine and water is disconnected accept where indicated in testing procedures. Retain
all screws and other attaching hardware for re-assembly.
JDF-4S shown
FIG. 1 ACCESS PANELS
49179 110613
13
SERVICE(CONT.)
DISPENSE PLATFORM REMOVAL
1. Remove concentrate dispense tips by turning 1/4 turn to the left, then pull straight down.
2. Lift and remove product shelf to access dispense platform(s).
3. Remove front thumb screw holding dispense platform(s).
4. Disconnect 12 pin connector above dispense platform in rear.
5. Disconnect 3/8” water line at quick disconnect.
6. Remove dispense platform(s) by pulling forward.
JDF-2S shown
The JDF-4S uses 2 of the two head dispense platforms.
FIG. 2 DISPENSE PLATFORM REMOVAL
49179 110613
14
SERVICE (CONT.)
5. Remove the wire to the ballast from the back of
each bracket.
6. Todisengagetheballastwirefromthebracket,push
a 1/16” allen wrench (or equivalent tool) into the
front hole that lines up with the wire in the back.
Pull the wire out.
Ballast (JDF-2S,4S)
JDF-2S shown
7. Repeat for each bracket.
8. White jumper must remain in place on the back of
the light socket.
9. Removescrewsfromeachballast.Removethegreen
ground wire from the ballast bracket by removing
the bracket’s bottom screw.
10. Install the single ballast (wires on the bottom) onto
the ballast bracket using 2 of the screws previously
removed.
11. Attach ballast wires to the back of bulb sockets by
pushing wires into holes in back of socket.
Note: Attach black wires to the top sockets, and blue
wires to the bottom sockets. Reference electrical sche-
matic if needed.
12. Snap all 4 bulb sockets back onto light panel. Re-
install fluorescent bulbs.
P1684.40
FIG. 3 BALLAST
Location:
13. Attach green ground wire to the bottom hole of the
ballast bracket using 1 screw.
14. Plug in 3-pin connector into the door harness.
15. To replace door cover, re-connect the dispense
switch harness to door harness. Fasten with 5
screws.
The door lamp ballast is located inside the dispenser
door mounted in the center of the door rear cover.
Test Procedure:
1. Disconnect the dispenser from the power source.
2. Disconnect a black and blue wire from one set of
lamp sockets.
16. Reconnect power to the unit. Test operation.
3. Connect an ohmmeter to the end of each wire.
4. Check for continuity between the two wires.
If continuity is present as described, the ballast is
operating properly.
If continuity is not present as described, replace the
ballast.
5. Check for continuity between the other pair of black
and blue wires.
Removal and Replacement:
1. Disconnect the dispenser from the power source.
2. Remove door cover by taking out the 5 screws and
unplug the dispense switch harness from the door
harness. Set door cover and screws aside.
3. Disconnect the 3-pin connector from the ballasts
to the door harness.
4. Remove fluorescent bulbs from the brackets. Pull
off the four snap-in light sockets from the light
panel.
P1219
FIG. 4 BALLAST TERMINALS
49179 110613
15
SERVICE (CONT.)
Cabinet Fan (all Models)
Removal and Replacement:
JDF-2S shown
1. Disconnect the dispenser from the power source.
2. Removethefourscrewsattachingthefanandcover
assembly.
3. Gently pull the cover forward and disconnect the
2-pin connector from the main wiring harness.
4. Removethefanfromthecoverassemblyanddiscard
the old fan.
5. Install the new fan to the cover assembly using
screws previously removed.
6. Reconnect the fan to the 2-pin connector on the
main wiring harness.
7. Install the fan and cover assembly to the cabinet
using screws previously removed.
8. Reconnect power to the dispenser.
P1684.40
FIG. 5 CABINET FAN
Location:
The cabinet fan is located inside the dispenser cabinet
mounted in the center behind the fan guard cover.
RED
2
1
Test Procedure:
1. Disconnect the dispenser from the power source.
2. Removethefourscrewsattachingthefanandcover
assembly.
BLK
3. Gently pull the cover forward and disconnect the
2-pin connector from the main wiring harness.
4. Check for continuity between the two wires on the
fan.
P1219
FIG. 6 CABINET FAN TERMINALS
If continuity is present as described, the fan is operat-
ing properly.
If continuity is not present as described, replace the
fan.
49179 110613
16
SERVICE (CONT.)
LG Compressor (JDF-2S,4S,4D)
Test Procedures:
Compressor Relay: Refer to FIG. 8
JDF-4S shown
1. Disconnect the dispenser from the power source.
2. Remove compressor terminal cover retainer (1).
3. Connect a voltmeter across the white wire and the
blue/blackwire.Connectthedispensertothepower
source.
The indication must be:
(a) 120 volts ac for two wire 120 volt models or
(b) 230 volts ac for two wire 230 volt models.
5. Disconnect the dispenser from the power source.
If voltage is present as described, proceed to the fol-
lowing test procedures.
If voltage is not present as described, refer to the Con-
tactor and check the contactor.
6. Disconnect the white wire from the compressor
relay.
7. Remove relay from the compressor.
8. Check for continuity across the terminal and the
pin socket on the rear of the relay.
If continuity is present as described, the compressor
start relay is operating properly.
P1684.40
FIG. 7 COMPRESSOR
Location:
The compressor is located at the top of the dispenser
frame.
If continuity is not present as described, replace relay.
Compressor:
1. Remove relay and yhermal overload protector.
2. Check for continuity across the bottom pin on the
compressor and the left top pin on the compressor.
If continuity is present as described, the electrical part
of the compressor is operating properly.
If continuity is not present as described, replace the
compressor.
1
2
3
Thermal Overload Protector:
1. Check for continuity across the terminals on the
thermal overload protector (3).
If continuity is present as described, the thermal over-
load protector is operating properly.
GRN Wire
P4298.20
If continuity is not present as described, replace the
thermal overload protector.
FIG. 8 COMPRESSOR THERMAL
OVERLOAD PROTECTOR LOCATION
1. Compressor Terminal Cover
2. Compressor Relay
3. Thermal Overload Protector
49179 110613
17
SERVICE (CONT.)
Compressor (Cont.)
Removal and Replacement:
Compressor Relay: Refer to FIG. 8
1. Remove the terminal cover (1)
2. Disconnect the white wire from the compressor
relay.
3. Pullrelay(2)offofthecompressorpinsanddiscard.
4. Push new relay onto the compressor pins.
5. Refer to Fig. 9 and reconnect the wires.
6. Reinstall terminal cover (1).
WHI Wire
Compressor Thermal Overload Protector: Refer to
FIG. 8
FIG. 9 RELAY TERMINALS
1. Remove terminal cover (1).
2. Disconnect the BLU/BLK wire of the harness from
the thermal overload protector.
3. Remove relay (2).
Plugs into Relay
4. Removeoverloadprotector(3)anddiscardoverload
protector.
BLU/BLK Wire
5. Install new overload protector (3) on to the com-
pressor.
6. Install relay (2).
FIG. 10 THERMAL OVERLOAD PROTECTOR
TERMINALS
7. Refer to Fig. 10 and reconnect the thermal overload
protector wires.
8. Reinstall terminal cover (1).
6. Install new compressor over the four studs in the
dispenser chassis with the fill valve to the right side
of the dispenser.
7. Secure compressor to the dispenser chassis using
four .25-20 keps nuts and washers.
8. Reconnect tubes from the condenser and the ac-
cumulator to the compressor.
9. Reinstall transformer.
10. Evacuate the system.
Compressor Assy:
NOTE: Before removal of any refrigeration component
the refrigerant in the system must be reclaimed by a
licensed refrigeration repair person.
NOTE: When replacing the compressor it is recom-
mended that the dryer also be replaced.
11. Recharge 120V and 230V system with:
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
securing the compressor to the chassis. Set nuts
and washers aside for reassembly.
4. Disconnect and remove the transformer.
5. From the right side of the dispenser lift the com-
pressorassemblyoverthefourstudsinthechassis
and remove compressor.
JDF-2S - 9 oz. Type R134A refrigerant.
Design Pressures: High 255 - Low 36 psi
JDF-4S & 4D - 10 oz. Type R134A refrigerant.
Design Pressures: High 335 - Low 88 psi
NOTE: The charging of the system must be done by a
licensed refrigeration repair person.
NOTE: Refer to Wiring Diagrams when reconnecting
wires to Compressor, Thermal Overload Protector and
Start Relay.
49179 110613
18
SERVICE (CONT.)
GD Compressor (JDF-2S,4S,4D)
Test Procedures:
JDF-4S shown
Compressor Start Relay: Refer to FIG. 12
WARNING: The compressor capacitor must be properly
discharged before proceeding. This is most commonly
done on low voltage capacitors by shorting across the
terminals with a screwdriver.
1. Disconnect the dispenser from the power source.
2. Remove compressor terminal cover retainer (4).
3. Connect a voltmeter across the white wire and the
blue/blackwire.Connectthedispensertothepower
source.
The indication must be:
(a) 120 volts ac for two wire 120 volt models or
(b) 230 volts ac for two wire 230 volt models.
5. Disconnect the dispenser from the power source.
If voltage is present as described, proceed to the fol-
lowing test procedures.
If voltage is not present as described, refer to the Con-
tactor and check the contactor.
6. Disconnect the two black wires from the compres-
sor start relay.
P1684.40
FIG. 11 COMPRESSOR
Location:
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.
If continuity is present as described, the compressor
start relay is operating properly.
If continuity is not present as described, replace re-
lay.
The compressor is located at the top of the dispenser
frame.
1
3
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.
If continuity is present as described, the electrical part
of the compressor is operating properly.
If continuity is not present as described, replace the
compressor.
2
4
P4040.40
FIG.12 COMPRESSOR THERMAL
OVERLOAD PROTECTOR LOCATION
Thermal Overload Protector:
1. Check for continuity across the terminals on the
thermal overload protector (3).
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.
1. Compressor Start Relay
2. Wiring Harness Strain Relief
3. Thermal Overload Protector
4. Compressor Terminal Cover
49179 110613
19
SERVICE (CONT.)
Compressor (Cont.)
Removal and Replacement:
BLU/BLK
GRN
Compressor Start Relay: Refer to FIG. 12
1. Remove the terminal cover (4)
2. Disconnect the wires from the compressor start
relay.
3. Pull relay (1) off of the compressor pins and dis-
card.
WHI
4. Push new relay onto the compressor pins.
5. Refer to Fig. 26 and reconnect the wires.
6. Reinstall terminal cover (4).
FIG. 13 RELAY TERMINALS
Compressor Thermal Overload Protector: Refer to
FIG. 12
1. Remove terminal cover (4).
2. Disconnect the BLU/BLK wire of the harness from
the thermal overload protector.
Plugs into Relay
3. Disconnect the BLK wire from the Compressor’s
upper terminal.
4. Remove overload protector (3) and start relay as
an assembly.
5. Removeoverloadprotector(3)anddiscardoverload
protector.
6. Install new overload protector (3) on to the relay
(1).
7. Install relay (1) and overload protector (2) on the
compressor terminal bracket.
FIG. 14 THERMAL OVERLOAD PROTECTOR
TERMINALS
5. From the right side of the dispenser lift the com-
pressorassemblyoverthefourstudsinthechassis
and remove compressor.
6. Install new compressor over the four studs in the
dispenser chassis with the fill valve to the right side
of the dispenser.
8. Refer to Fig. 27 and reconnect the thermal overload
protector wires.
9. Reinstall terminal cover (4).
7. Secure compressor to the dispenser chassis using
four .25-20 keps nuts and washers.
8. Reconnect tubes from the condenser and the ac-
cumulator to the compressor.
9. Reinstall transformer.
10. Evacuate the system.
11. Recharge 120V and 230V system with:
Compressor Assy:
NOTE: Before removal of any refrigeration component
the refrigerant in the system must be reclaimed by a
licensed refrigeration repair person.
NOTE: When replacing the compressor it is recom-
mended that the dryer also be replaced.
JDF-2S - 9 oz. Type R134A refrigerant.
Design Pressures: High 255 - Low 36 psi
JDF-4S & 4D - 10 oz. Type R134A refrigerant.
Design Pressures: High 335 - Low 88 psi
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
securing the compressor to the chassis. Set nuts
and washers aside for reassembly.
NOTE: The charging of the system must be done by a
licensed refrigeration repair person.
NOTE: Refer to Wiring Diagrams when reconnecting
wires to Compressor, Thermal Overload Protector and
Start Relay.
4. Disconnect and remove the transformer.
49179 110613
20
SERVICE (CONT.)
Compressor (JDF-4SB)
Test Procedures:
Compressor Start Relay: Refer to FIG. 16
WARNING: The compressor capacitor must be properly
discharged before proceeding. This is most commonly
done on low voltage capacitors by shorting across the
terminals with a screwdriver.
1. Disconnect the dispenser from the power source.
2. Remove compressor terminal cover retainer (4).
3. Connect a voltmeter across the white wire and the
blue/blackwire.Connectthedispensertothepower
source.
The indication must be:
(a) 120 volts ac for two wire 120 volt models or
(b) 230 volts ac for two wire 230 volt models.
5. Disconnect the dispenser from the power source.
If voltage is present as described, proceed to the fol-
lowing test procedures.
If voltage is not present as described, refer to the Con-
tactor and check the contactor.
P1684.40
FIG. 15 COMPRESSOR
Location:
The compressor is located at the top of the dispenser
frame.
6. Disconnect the two black wires from the compres-
sor start relay.
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.
If continuity is present as described, the compressor
start relay is operating properly.
230V shown
1
3
2
4
If continuity is not present as described, replace re-
lay.
7
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.
If continuity is present as described, the electrical part
of the compressor is operating properly.
If continuity is not present as described, replace the
compressor.
5
6
P4068
FIG. 16 COMPRESSOR THERMAL
OVERLOAD PROTECTOR LOCATION
1. Compressor Start Relay
2. Wiring Harness Strain Relief
3. Thermal Overload Protector
4. Compressor Terminal Cover
5. Cable 230V only
6. Capcitor 230V only
7. Cover, Capacitor 230V only
Thermal Overload Protector:
1. Check for continuity across the terminals on the
thermal overload protector (3).
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.
49179 110613
21
SERVICE (CONT.)
Compressor (Cont.)
Removal and Replacement:
BLU/BLK
GRN
Compressor Start Relay: Refer to FIG. 16
1. Remove the terminal cover (4)
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. 16 and reconnect the wires.
6. Reinstall terminal cover (4).
WHI
BLU from Capacitor
BRN from Capacitor
FIG. 17 RELAY TERMINALS
Compressor Thermal Overload Protector: Refer to
FIG. 16
Plugs into Relay
1. Remove terminal cover (4).
2. Disconnect the WHI/ORN wire of the harness from
the thermal overload protector.
3. Disconnect the BLK wire from the Compressor’s
upper terminal.
4. Remove overload protector (3) and start relay as
an assembly.
FIG. 18 THERMAL OVERLOAD PROTECTOR
TERMINALS
5. Removeoverloadprotector(3)anddiscardoverload
protector.
6. Install new overload protector (3) on to the relay
(1).
7. Install relay (1) and overload protector (2) on the
compressor terminal bracket.
8. Refer to Fig. 17 and reconnect the thermal overload
protector wires.
4. Disconnect and remove the transformer.
5. From the right side of the dispenser lift the com-
pressorassemblyoverthefourstudsinthechassis
and remove compressor.
6. Install new compressor over the four studs in the
dispenser chassis with the fill valve to the right side
of the dispenser.
7. Secure compressor to the dispenser chassis using
four .25-20 keps nuts and washers.
9. Reinstall terminal cover (4).
8. Reconnect tubes from the condenser and the ac-
cumulator to the compressor.
9. Reinstall transformer.
10. Evacuate the system.
11. Recharge 120V and 230V system with:
Compressor Assy:
NOTE: Before removal of any refrigeration component
the refrigerant in the system must be reclaimed by a
licensed refrigeration repair person.
NOTE: When replacing the compressor it is recom-
mended that the dryer also be replaced.
JDF-4SB - 10 oz. Type R134A refrigerant.
Design Pressures: High 335 - Low 88 psi
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
securing the compressor to the chassis. Set nuts
and washers aside for reassembly.
NOTE: The charging of the system must be done by a
licensed refrigeration repair person.
NOTE: Refer to Wiring Diagrams when reconnecting
wires to Compressor, Thermal Overload Protector and
Start Relay.
49179 110613
22
SERVICE (CONT.)
Compressor Switch (all Models)
Removal and Replacement:
JDF-4S shown
1. Disconnect the dispenser from the power source.
2. Remove the cover or splash panel to gain access
to the switch.
3. Gently disconnect the wiring harness from the
switch.
4. Remove the switch from the mounting bracket and
discard.
5. Install the new into the mounting bracket.
6. Reconnect the wiring harness to the new switch.
7. Install covers or panels previously removed.
8. Reconnect power to the dispenser.
P1684.40
FIG. 19 COMPRESSOR SWITCH
Location:
RED/BLK
BLK
On models JDF-2S and 4S, early models had the switch
located on the back of the dispenser next to the water
inlet. On later models JDF-2S, 4S, 4D and 4SB, the
switch is located on the front left of the dispenser
behind the splash panel.
P1219
FIG. 20 COMPRESSOR SWITCH TERMINALS
Test Procedure:
1. Disconnect the dispenser from the power source.
2. Remove the two wires from the switch terminals.
3. Check for continuity across the switch terminals
with the switch in the “ON” position. Continuity
must not be present when the switch is in the “OFF”
position.
If continuity is present as described, reconnect the
wires to the switch terminals.
If continuity is not present as described, replace the
switch.
49179 110613
23
SERVICE (CONT.)
Condenser Fan (all Models)
Removal and Replacement:
JDF-4S shown
1. Disconnect the dispenser from the power source.
2. Removethefourscrewsattachingthefanandcover
assembly to the refrigeration cabinet.
3. Gentlypullthecoverassemblyforwardanddiscon-
nect the 2-pin connector from the fan to the main
harness.
4. Remove the fan from the cover assembly and dis-
card.
5. Install the new fan onto the cover assembly.
6. Reconnect the wiring harness to the new fan.
7. Install fan and cover assembly using four screws
previously removed.
8. Reconnect power to the dispenser.
P1684.40
FIG. 21 CONDENSER FAN
Location:
The condenser fan is located inside the main frame
below the compressor assembly.
Test Procedure:
1. Disconnect the dispenser from the power source.
2. Disconnectthe2-pinfromthefantothemainwiring
harness.
BLU/BLK
3. Check for continuity across the fan terminals.
P1219
WHI
If continuity is present as described, reconnect the
wires to the fan terminals.
FIG. 22 CONDENSER FAN TERMINALS
If continuity is not present as described, replace the
fan.
49179 110613
24
SERVICE (CONT.)
Control Board, Main (all Models)
Removal and Replacement:
JDF-4S shown
1. Removethefour#6-32screwssecuringthecontrol
board to the component bracket.
2. Disconnectalltheplugsonthemainwiringharness
from the connectors on the control board.
3. Remove the spacers from the control board and
discard.
4. Install the spacers on to the new control board
5. Reconnect all plugs on the main harness to the
connectors on the control board.
6. Installnewcontrolboardonthecomponentbracket
using four #6-32 screws.
NOTE: Verify all ground wires are connected to the
grounding stud and secured with nuts.
P3250.25
FIG. 23 CONTROL BOARD
Location:
The Main Control Board is located on the electrical
component enclosure behind the splash panel.
Test Procedure:
Power Supply Circuitry:
1. Disconnect the dispenser from the power source.
2. With a voltmeter, back probe check the voltage
across pins 1 & 3 of the J6 connector on the wir-
ing harness. Connect the dispenser to the power
source. The indication must be 24 volts ac.
3. Disconnect the dispenser from the power source.
If voltage is present as described, proceed to step 4.
Ifvoltageisnotpresentasdescribed,refertotheWiring
Diagrams and check the dispenser wiring harness back
to the transformer (See TRANSFORMER).
JDF-4S
4. Disconnect the dispenser from the power source.
5. With a voltmeter, back probe check the voltage
across pins 1 & 3 of the J12 connector on the
wiringharness. Connectthedispensertothepower
source. The indication must be 24 volts ac.
6. Disconnect the dispenser from the power source.
Ifvoltageisnotpresentasdescribed,refertotheWiring
Diagrams and check the dispenser wiring harness back
to the transformer (See TRANSFORMER).
JDF-2S
FIG. 24 CONTROL BOARD CONNECTORS
49179 110613
25
SERVICE (CONT.)
Portion Control Board (JDF-2S,4S)
Removal and Replacement:
1. Remove the five screws securing the door cover to
the door frame.
2. Carefully pull the cover forward and disconnect
all switch harnesses from the connectors on the
control board.
3. Removethefour#6-20screwssecuringthecontrol
board to the light panel.
4. Remove the spacers from the control board and
discard the old board.
5. Install the spacers on to the new control board.
6. Install new control board on the light panel using
four #6-20 screws.
7. Position the door cover to the door frame and
reconnect all switch harnesses to the connectors
on the control board.
8. Secure the door cover to the frame with the five
screws previously removed.
P4034.25
FIG. 25 PORTION CONTROL BOARD
Location:
ThePortionControlBoardislocatedinsidethedoor
cover mounted on the bracket.
Test Procedure:
1. Disconnect the dispenser from the power source.
2. With a voltmeter, back probe check the voltage
across pins 1 & 5 of the J6 connector on the wir-
ing harness. Connect the dispenser to the power
source. The indication must be 24 volts ac.
3. Disconnect the dispenser from the power source.
J-8
J-7
Ifvoltageisnotpresentasdescribed,refertotheWiring
Diagrams and check the dispenser wiring harness back
to the transformer (See TRANSFORMER).
J-9
J-6
J-1
J-2
J-3
J-4
J-5
J-6
J-7
J-8
J-9
Cold Water Switch
Left Left Dispense Switch
Left Middle Dispense Switch
Right Middle Dispense Switch
Right Right Dispense Switch
Main Harness
N/A
N/A
N/A
J-5
J-1
J-4
J-3
J-2
FIG. 26 CONTROL BOARD CONNECTORS
49179 110613
26
SERVICE (CONT.)
Push Button Control Board (JDF-4D)
Removal and Replacement:
1. Remove the five screws securing the door cover to
the door frame.
2. Carefully pull the cover forward and disconnect
all switch harnesses from the connectors on the
control board.
3. Removethefour#6-20screwssecuringthecontrol
board to the light panel.
4. Remove the spacers from the control board and
discard the old board.
5. Install the spacers on to the new control board.
6. Install new control board on the light panel using
four #6-20 screws.
R
E
W
O
P
G
IN
L
7. Position the door cover to the door frame and
reconnect all switch harnesses to the connectors
on the control board.
O
O
C
P4081.25
8. Secure the door cover to the frame with the five
screws previously removed.
FIG. 27 PUSH BUTTON CONTROL BOARD
Location:
The Push Button Control Board is located inside
the door cover mounted on the bracket.
Test Procedure:
1. Disconnect the dispenser from the power source.
2. With a voltmeter, back probe check the voltage
across pins 1 & 5 of the J6 connector on the wir-
ing harness. Connect the dispenser to the power
source. The indication must be 24 volts ac.
3. Disconnect the dispenser from the power source.
J-7
J-9
Ifvoltageisnotpresentasdescribed,refertotheWiring
Diagrams and check the dispenser wiring harness back
to the transformer (See TRANSFORMER).
J-11
J-10
J-1
N/A
J-6
J-7
Main Harness
N/A
J-9
J-10
J-11
Rinse Switch
Dispense Nozzles (Disable)
Dispense Switches
J-6
FIG. 28 CONTROL BOARD CONNECTORS
49179 110613
27
SERVICE (CONT.)
Portion Control Board (JDF-4D)
Removal and Replacement:
1. Remove the five screws securing the door cover to
the door frame.
2. Carefully pull the cover forward and disconnect
all switch harnesses from the connectors on the
control board.
3. Removethefour#6-20screwssecuringthecontrol
board to the light panel.
4. Remove the spacers from the control board and
discard the old board.
5. Install the spacers on to the new control board.
6. Install new control board on the light panel using
four #6-20 screws.
R
E
W
O
P
G
IN
L
O
O
C
7. Position the door cover to the door frame and
reconnect all switch harnesses to the connectors
on the control board.
8. Secure the door cover to the frame with the five
screws previously removed.
P4081.25
FIG. 29 PORTION CONTROL BOARD
Location:
ThePortionControlBoardislocatedinsidethedoor
cover mounted on the bracket.
Test Procedure:
1. Disconnect the dispenser from the power source.
2. With a voltmeter, back probe check the voltage
across pins 1 & 5 of the J6 connector on the wir-
ing harness. Connect the dispenser to the power
source. The indication must be 24 volts ac.
3. Disconnect the dispenser from the power source.
J-7
J-8
Ifvoltageisnotpresentasdescribed,refertotheWiring
Diagrams and check the dispenser wiring harness back
to the transformer (See TRANSFORMER).
J-6
J-1
J-2
J-3
J-4
J-5
J-6
J-7
J-8
J-9
Cold Water Switch
Left Left Dispense Switch
Left Middle Dispense Switch
Right Middle Dispense Switch
Right Right Dispense Switch
Main Harness
N/A
N/A
N/A
J-5
J-1
J-4
J-3
J-2
J-9
FIG. 30 CONTROL BOARD CONNECTORS
49179 110613
28
SERVICE (CONT.)
Circulation Pump (all Models)
Removal and Replacement:
1. Removedispenseplatform(s)foreaseoftakingout
recirculating pump.
2. Remove left and right side panels.
3. Remove silicone condensation hose out of bath
tank along side recirculating pump.
4. Disconnect pump motor and condenser fan wires
(1/4” spade terminals).
5. Remove2screwsleftandrightsideofthecondenser
mountingbracket.Removecondenserfanassembly
out the right side of the machine.
6. Release recirculating pump holding bracket right
side (2 nuts).
7. Lift up on recirculating pump and maneuver out
the right side of the machine
FIG. 31 CIRCULATION PUMP
RED/BLK to
Compressor Switch
Location:
The Circulation Pump is located on top of the water
bath tank cover.
WHI to Transformer
Test Procedure:
1. Disconnect the dispenser from the power source.
2. With a voltmeter .
If voltage is present as described, proceed to step 4.
Ifvoltageisnotpresentasdescribed,refertotheWiring
Diagrams and check the dispenser wiring harness back
to the transformer (See TRANSFORMER).
P3250.25
FIG. 32 CIRCULATION PUMP
49179 110613
29
SERVICE (CONT.)
Dispense Platform Switch (all Models)
Removal and Replacement:
JDF-2S shown
1. Disconnect the dispenser from the power source.
2. Loosen the two #8-32 screws securing the com-
ponent mounting bracket to the dispenser base.
3. Disconnect the two black wires from the switch.
4. Press the locking tabs of the old switch and remove
from the component mounting bracket.
5. Pressthenewswitchintothecomponentmounting
bracket.
6. Connect the two black wires to the switch terminals
as shown below.
7. Positionthecomponentmountingbracketinthedis-
penser base and secure with two #8-32 screws.
8. Return power to the dispenser.
FIG. 33 DISPENSE PLATFORM SWITCH
Location:
The Dispense Platform Switch is located below the
dispenser in the front center and is mounted on the
component mounting bracket.
BLK to J5-3
BLK to J5-4
Test Procedure:
1. Disconnect the dispenser from the power source.
2. With a voltmeter, back probe check across the two
black wires on the switch.
3. Return power to the dispenser. The indication must
be 24 volts ac.
4. Disconnect the dispenser from the power source.
P1640
FIG. 34 SWITCH TERMINALS
If voltage is present as described, proceed to step 5.
Ifvoltageisnotpresentasdescribed,refertotheWiring
Diagrams and check back to the control board, J5.
5. With an ohmmeter, chech for continuity between
the terminals shown in Fig. 34.
Continuity must be present when the switch is in the
ON position.
If continuity is not present, replace the switch.
49179 110613
30
SERVICE (CONT.)
Dispense Pump (all Models except JDF-4D)
5. Install the new pump tube around the rotor and
position into the rear housing with the clamp rest-
ing on the top edge.
6. Install the front housing to be flush with the rear
housing.
7. Position the pump assembly back on the platform
andsecurewithfour#8-32x2.45screwspreviously
removed.
8. Repeat for remaining pumps.
FIG. 35 DISPENSE PUMP
Location:
The Dispense Pumps are located on the platform
assembly.
Removal, Inspection, and Replacement:
1. Loosen the four #8-32 x 2.45 screws securing the
pump assembly to the platform.
2. Pry the two halves of the pump housing apart to
reveal the pump tube and the rotor.
3. Inspect the pump tubing for signs of wear and
replace every six months or as needed.
4. Inspectthepumprotorforsignsofwearandreplace
if necessary.
P1640
FIG. 36 DISPENSE PUMP COMPONENTS
49179 110613
31
SERVICE (CONT.)
Dispense Motor (all Models)
Removal and Replacement:
1. Disconnect the two wires from the dispense mo-
tor.
2. Loosen the four #8-32 screws securing the motor
to the platform assembly and remove the motor.
3. Inspect the gasket and rubber bushings for signs
of wear and replace if necessary.
4. Position the new motor into place with the gasket
and bushings onto the platform. Secure with four
#8-32 screws previously removed.
5. Reconnect the two wires to the motor as shown in
Fig. 38.
FIG. 37 DISPENSE MOTOR
Location:
The Dispense Motors are located on the rear of the
platform assembly.
Test Procedure:
1. Disconnect the dispenser from the power source.
2. With a voltmeter, check the voltage across the two
wire terminals of the motor assembly. Connect the
dispenser to the power source. The indication must
be 24 volts ac.
3. Disconnect the dispenser from the power source.
If voltage is present as described, replace the motor.
Ifvoltageisnotpresentasdescribed,refertotheWiring
Diagrams and check the dispenser wiring harness back
to the transformer (See TRANSFORMER).
FIG. 38 DISPENSE MOTOR CONNECTORS
49179 110613
32
SERVICE (CONT.)
Dispense Valve (all Models)
Removal and Replacement:
1. Disconnect the two wires from the dispense
valve.
2. Remove the #6-32 screw and plate securing the
water manifold tube to the valve.
3. Loosen the two #6-32 screws securing the valve
to the platform assembly and remove the valve.
4. Install the new valve onto the platform and secure
with two #6-32 screws previously removed.
5. Inspect the o-ring on the manifold tube connector
for signs of wear and replace if necessary.
6. Connect the water manifold tube to the valve and
secure in place with the plate and #6-32 screw
previously removed.
7. Reconnect the two wires to the valve as shown in
Fig. 40.
FIG. 39 DISPENSE VALVE
Dispense Station
Location:
The Dispense Valves are located at the front of the
platform assembly.
#1 WHI/VIO
Dispense Station
#2 WHI/ORN
Test Procedure:
Dispense Station
1. Disconnect the dispenser from the power source.
2. With a voltmeter, check the voltage across the two
wire terminals of the valve solenoid. Connect the
dispenser to the power source. The indication must
be 24 volts ac.
#3 WHI/VIO
Dispense Station
#4 WHI/ORN
YEL to Control Board
3. Disconnect the dispenser from the power source.
If voltage is present as described, replace the valve.
Ifvoltageisnotpresentasdescribed,refertotheWiring
Diagrams and check the dispenser wiring harness back
to the transformer (See TRANSFORMER).
P3503
FIG. 40 DISPENSE VALVE CONNECTORS
49179 110613
33
SERVICE (CONT.)
Dispense Switches (JDF-2S, JDF-4S)
Removal and Replacement:
1. Disconnect the dispenser from the power source.
2. Remove the five screws attaching the dispenser
door cover to the door and move the door cover
to gain access to the switches.
3. Disconnect the wires on the dispense switch to be
removed from the door wiring harness.
4. Compress the clips inside the door on the dispense
switch and gently push the switch through the
opening.
5. Push new switch into the opening and spread the
clips to hold the switch in the door.
6. Reconnect the wires to the dispense switch from
door wiring harness.
7. Reinstall the door cover and secure with the five
screws previously removed.
8. Refer to Fig. 42 when reinstalling wires.
FIG. 41 DISPENSE SWITCHES
Location:
The dispense switches are located on the lower
outside of the dispenser door.
BLK
RED
Test Procedure:
1. Disconnect the dispenser from the power source.
2. Remove the five screws attaching the dispenser
door cover to the door and move the door cover
to gain access to the switches.
BLK
GRN
3. With a voltmeter, check the voltage across the two
wires for each dispense switch. Connect the dis-
penser to the power source. The indication must
be +5 volts dc.
Station #2
BLK
ORN
Station #1
BLK
YEL
If voltage is present as described, proceed to #4.
Ifvoltageisnotpresentasdescribed,refertotheWiring
Diagrams and check the dispenser wiring harness.
Station #4
4. Check for continuity across the terminals (top right
to top left) of the dispense switch with the switch in
the “ON” position. Continuity must not be present
when the switch is in the “OFF” (released) posi-
tion.
Station #3
P1449
FIG. 42 DISPENSE SWITCH TERMINALS
If continuity is present as described, reconnect the door
wiring harness, the switch is operating properly.
If continuity is not present as described, replace the
switch.
49179 110613
34
SERVICE (CONT.)
Cold Water Dispense Switch (JDF-4S only)
Removal and Replacement:
1. Disconnect the dispenser from the power source.
2. Remove the five screws attaching the dispenser
door cover to the door and move the door cover
to gain access to the switches.
3. Disconnect the wires on the dispense switch from
the door wiring harness.
4. Compress the clips inside the door on the dispense
switch and gently push the switch through the
opening.
5. Push new switch into the opening and spread the
clips to hold the switch in the door.
6. Reconnect the wires to the dispense switch from
door wiring harness.
7. Reinstall the door cover and secure with the five
screws previously removed.
8. Refer to Fig. 44 when reinstalling wires.
FIG. 43 COLD WATER DISPENSE SWITCH
Location:
The cold water dispense switch is located on the
lower outside of the dispenser door.
Test Procedure:
1. Disconnect the dispenser from the power source.
2. Remove the five screws attaching the dispenser
door cover to the door and move the door cover
to gain access to the switch.
3. With a voltmeter, check the voltage across the two
wiresforthedispenseswitch.Connectthedispenser
to the power source. The indication must be +5
volts dc.
BLK
BLU
If voltage is present as described, proceed to #4.
Ifvoltageisnotpresentasdescribed,refertotheWiring
Diagrams and check the dispenser wiring harness.
4. Check for continuity across the terminals (top right
to top left) of the dispense switch with the switch in
the “ON” position. Continuity must not be present
when the switch is in the “OFF” (released) posi-
tion.
P1449
FIG. 44 COLD WATER SWITCH TERMINALS
If continuity is present as described, reconnect the door
wiring harness, the switch is operating properly.
If continuity is not present as described, replace the
switch.
49179 110613
35
SERVICE (CONT.)
Dispense Membrane Switch (all Models)
Removal and Replacement:
1. Disconnect the dispenser from the power source.
2. Open the dispenser door.
3. Remove the four #8-32 screws securing the lower
door panel and remove the panel.
4. Disconnect the six pin harness from the switch
board.
TER
A
COLD
W
5. Carefully peel the membrane switch from the front
of the switch bezel.
6. Remove any excess adhesive from the bezel sur-
face.
7. Remove the backing from the new membrane
switch.
8. Feed the membrane switch harness through the
openning and apply the new membrane switch to
the switch bezel.
FIG.45 MEMBRANE SWITCHES
Location:
The dispense buttons are located on the lower
outside of the dispenser door and actuate switches on
the dispense switch board located on the inside of the
door.
9. Connect the switch harness to the control board.
Test Procedures:
NOTE: Before continuing, check that the ribbon cable
is properly connected to the control board and not a
pin off in either direction.
1. Disconnect the dispenser from the power source.
2. Remove the rear panel and disconnect ribbon
cable.
3. Check for continuity of the switches using pin #1as
common.
#1 Common
#2 ON/STOP
#3 Large
#4 Medium
#5 Small
PORTION CONTROL
If continuity is not present when the appropriate switch
is pressed, the Membrane Switch must be replaced.
If continuity is present, chech the short harness going
to J6 on the Control Board.
FIG. 46 MEMBRANE SWITCH
49179 110613
36
SERVICE (CONT.)
Cold Water Dispense Membrane Switch (all Models)
Removal and Replacement:
1. Disconnect the dispenser from the power source.
2. Open the dispenser door.
3. Remove the four #8-32 screws securing the lower
door panel and remove the panel.
4. Disconnect the three pin harness from the switch
board.
TER
A
COLD
W
5. Carefully peel the membrane switch from the front
of the switch bezel.
6. Remove any excess adhesive from the bezel sur-
face.
7. Remove the backing from the new membrane
switch.
8. Feed the membrane switch harness through the
openning and apply the new membrane switch to
the switch bezel.
FIG.47 MEMBRANE SWITCHES
Location:
The dispense buttons are located on the lower
outside of the dispenser door and actuate switches on
the dispense switch board located on the inside of the
door.
9. Connect the switch harness to the control board.
Test Procedures:
NOTE: Before continuing, check that the ribbon cable
is properly connected to the control board and not a
pin off in either direction.
1. Disconnect the dispenser from the power source.
2. Remove the rear panel and disconnect ribbon
cable.
3. Check for continuity of the switches using pin #1as
common.
TER
A
#1 Common
COLD
W
#2 Cold Water
If continuity is not present when the appropriate switch
is pressed, the Membrane Switch must be replaced.
If continuity is present, chech the short harness going
to J6 on the Control Board.
COLD WATER DISPENSE
FIG. 48 MEMBRANE SWITCH
49179 110613
37
SERVICE (CONT.)
EMI Filter (all Models)
Removal and Replacement:
JDF-4S shown
1. Disconnect the wires from the EMI Filter.
2. Remove the two #8-32 screws and nuts securing
the EMI Filter.
3. Remove and discard EMI Filter.
4. Install new EMI Filter using two #8-32 screws and
nuts to secure EMI Filter to its former location.
5. Refer to Fig. 50 when reconnecting the wires.
FIG. 49 EMI FILTER
Location:
118.0 kΩ - 118.5 kΩ
Across either pair
The EMI Filter is located on the electrical component
mounting bracket on the lower front of the dispenser
behind the splash panel.
Test Procedure:
1. Disconnect the dispenser from the power source.
2. Disconnectthetwoblackwiresandtwowhitewires
on the EMI Filter from the power cord and the main
wiring harness.
3. Check for resistance between the two black leads
on the EMI Filter.
FIG. 50 EMI FILTER CONNECTORS
If resistance is present as described the EMI Filter is
operating properly.
If resistance is not present as described, replace the
EMI Filter.
49179 110613
38
SERVICE (CONT.)
Lamps, Holders and Ballast(s) (Early Models)
Removal and Replacement:
1. Disconnect the dispenser from the power source.
2. Remove the five #10-32 screws securing the door
cover to the door and move the cover aside to gain
access to the light panel.
3. Rotate the lamp to remove from the lamp hold-
ers.
4. Pry the lamp holder from light panel.
5. Cut the two wires from the ballast as close the lamp
holder as possible and remove the lamp holder.
6. Strip the ends of the wires from the ballast and
install the into the new lamp holder.
7. Snap the new lamp holder into the holes on the
light panel.
8. Replace the lamps and install the door cover using
the five screws previously removed.
FIG. 51 LAMPS & HOLDERS
Location:
The lamps and lamp holders are located on the door
light panel behind the door cover.
Test Procedure:
1. Disconnect the dispenser from the power source.
2. Remove the five #10-32 screws securing the door
cover to the door and move the cover aside to gain
access to the light panel.
3. Rotate the lamp to remove from the lamp hold-
ers.
4. Check for continuity across terminals on each end
of the lamp.
If continuity is present as described, continue to step 5.
Ifcontinuityisnotpresentasdescribedreplacethelamp.
FIG. 52 LAMP HOLDERS
5. Check for 24VDC supplied to ballast (dual ballast
black to red, single ballast white to red).
If voltage is present as described, replace ballast. If
voltage is not present as described, refer to the Wiring
Diagrams and check the wiring harness back to the
transfomer/rectifier.
49179 110613
39
SERVICE (CONT.)
LED Lamps (JDF-2S, JDF-4S)
Removal and Replacement:
1. Disconnect power from the dispenser.
2. Remove the five #6-32 screws securing the door
cover to the door.
3. Carefully lower the door cover and disconnect the
lamp terminals from the LED regulator board.
4. Remove and discard the faulty LED board.
5. Install a new LED regulator board exposing the
adhesive backing.
LED regulator board
6. Refer to Fig. 54 and reconnect wires to the LED
regulator board.
7. Replace the door cover and secure with the five
#6-32 screws.
8. Return power to the dispenser.
FIG. 53 LED DOOR LIGHTS
Location:
TheLEDdoorlightsarelocatedinsidethedispenser
door.
Test Procedures:
No illumination at all: First verify that the dispense
lockout switch has not been turned off!
1. Disconnect power from the dispenser.
2. CheckthevoltageacrosstheblackandredleadsofJ2
or J3 at the LED regulator board with a voltmeter.
Reconnect power to the dispenser. The indication
must be 24 volts dc.
J3
J2
J1
3. Disconnect power from the dispenser.
If voltage is present as described, the LED regulator
board is working correctly.
White to brown
unregulated +30VDC
If voltage is not present as described, go to step 4.
FIG. 54 LED DOOR LIGHT WIRING
4. Check for supply voltage (unregulated +30VDC)
across brown wire and white wire at J1 of the
regulator board. (FIG 54).
If voltge is present as described, replace LED regulator
board.
If voltage is not present as described, check the wiring
back to the main CBA.
49179 110613
40
SERVICE (CONT.)
Rectifier (JDF-2S, JDF-4S)
Removal and Replacement:
1. Disconnect the wires from the rectifier.
2. Remove the #10-32 screw securing the rectifier.
3. Remove the rectifier and discard.
4. Secure new rectifier with #10-32 screw.
5. Refer to Fig. 56 and reconnect the wires.
BLU from Door Harness (+)
WHI/GRN to Transformer (~ AC)
WHI/BLK to Transformer (~ AC)
WHI from Door Harness (-)
FIG. 56 RECTIFIER TERMINALS
FIG. 55 RECTIFIER
Location:
The rectifier is located on the electrical component
mounting bracket on the lower front of the dispenser
behind the splash panel.
Test Procedures:
1. Disconnect the dispenser from the power
source.
2. Remove the blue wire and the white wire from the
rectifier.
3. Check the voltage across the (+) and (-) terminals
on the rectifier with a voltmeter. Connect the dis-
penser to the power source. The indication must
be approximately 24 volts dc.
4. Disconnect the dispenser from the power
source.
If voltage is present as described, the rectifier is op-
erating properly.
If voltage is not present as described, refer to the
dispenser wiring diagram and check the wiring back
to the transformer.
49179 110613
41
SERVICE (CONT.)
Relay (all Models)
4. Disconnect the blue/black wire and the red/black
wires from relay terminals #4 and #6.
5. Connect the dispenser to the power source.
6. Turn on power and check for continuity across
terminals on relay.
If continuity is present as described, disconnect the
dispenser from power source and reconnect wires to
terminals #4 and #6, the relay is working.
If continuity is not present as described, do the same
continuity test across terminals #2 and #8. If continu-
ity is present between terminals #2 and #8, reconnect
wires to terminals #4 and #6 instead of #2 and #8.
If continuity is not present as described, replace the
relay.
FIG. 57 RELAY
Removal and Replacement:
Location:
The relay (or contactor) is located inside the dis-
penser chassis on the lower outside of the component
bracket.
1. Disconnect the wires from the relay.
2. Remove the two #8-32 locking screws securing the
relay and mounting bracket to the chassis. Remove
and discard relay.
3. Install the new relay to the mounting bracket and
thenonthechassisusingtwo#8-32lockingscrews.
4. Refer to Fig. 58 to reconnect the wires.
Test Procedures:
1. Disconnect the dispenser from the power source.
2. Withavoltmeter,checkthevoltageacrossthewhite
wireandthewhite/blackwire.Connectthedispenser
to the power source. The indication must be:
a) 120 volts ac for 120 volt models.
Terminal #1
BLK from
Main Harness
Terminal #0
WHI from
Main Harness
b) 230 volts ac for 230 volt models.
3. Disconnect the dispenser from the power source.
Terminal #8
BLK from
Main Harness
If voltage is present as described, proceed to #4.
If voltage is not present as described, refer to the Wir-
ing Diagram and check the dispenser wiring harness.
If harness has continuity, replace Control Board.
Terminal #6
WHI/ORN from
Main Harness
Terminal #2
Terminal #4
FIG. 58 RELAY TERMINALS
49179 110613
42
SERVICE (CONT.)
Resistor (all 230V Models)
Removal and Replacement:
1. Disconnect the dispenser from the power source.
2. Disconnect the resistor from the relay and discard.
3. Install new resistor to the relay as shown below.
4. Return power to the dispenser.
FIG. 59 RESISTOR
Location:
The resistor is located on the relay at the electrical
component mounting bracket on the lower front of the
dispenser behind the splash panel.
P3864
Test Procedures:
FIG. 60 RESISTOR TERMINALS
1. Disconnect the dispenser from the power source.
2. Remove the resistor from the relay.
3. Check the resistance across the terminals of the
resistor with a ohmmeter. The indication must be
approximately 36k
5%.
4. Disconnect the dispenser from the power source.
If resistance is present as described, the resistor is
operating properly.
If resistance is not present as described, replace the
resistor.
49179 110613
43
SERVICE (CONT.)
Solenoid - Cold Water (JDF-4S only)
6. Check the solenoid valve for coil action. Connect
the dispenser to the power source. Press the Cold
Water dispense switch and listen carefully in the
vicinity of the solenoid valve for a “clicking” sound
as the coil magnet attracts.
7. Disconnect the dispenser from the power source.
If the sound is heard as described and water will not
pass through the solenoid valve, there may be a block-
age in the tank water outlet before the solenoid valve
or, the solenoid valve may require inspection for wear,
and removal of waterborne particles.
If the sound is not heard as described, replace the
solenoid valve.
Removal and Replacement:
1. Disconnect the dispenser from the power source.
2. Turn off the water supply to the dispenser.
3. Remove the two wires from the solenoid valve.
4. Disconnect the water line from the solenoid valve.
5. Remove the #10-32 screws securing the solenoid
valve to the chassis frame. Remove solenoid valve.
6. Usingthe #10-32screwsinstallnewsolenoidvalve
to the chassis frame.
FIG. 61 COLD WATER DISPENSE SOLENOID
Location:
The Cold Water dispense solenoid is located at the
inside rear of the chassis frame.
Test Procedures:
1. Disconnect the dispenser from the power source.
2. Disconnect the two wires from the solenoid valve.
Press the Cold Water dispense switch on front of
the door.
3. With a voltmeter, check the voltage across the two
wires. Connect the dispenser to the power source.
The indication must be:
7. Reconnect the water lines to solenoid valve.
8. Refer to schematic wiring diagrams when recon-
necting the wires.
a) 120 volts ac for two wire 120 volt models, three
wire 120/208 volt, and 120/240 volt models.
b) 240 volts ac for two wire 240 volt models.
c) 230 volts ac for two wire 230 volt models.
4. Disconnect the dispenser from the power source.
WHI/VIO to Control Board
If voltage is present as described, proceed to #5
If voltage is not present as described, refer to Wiring
Diagrams and check dispenser wiring harness.
5. Check for continuity across the solenoid valve coil
terminals.
WHI to Control Board
If continuity is present as described, reconnect the two
wires to the solenoid.
If continuity is not present as described, replace the
solenoid valve.
FIG. 62 COLD WATER SOLENOID
TERMINALS
49179 110613
44
SERVICE (CONT.)
Solenoid - Inlet (all Models)
If the sound is heard as described and water will not
pass through the solenoid valve, there may be a block-
age in the water line before the solenoid valve or, the
solenoid valve may require inspection for wear, and
removal of waterborne particles.
If the sound is not heard as described, replace the
solenoid valve.
Removal and Replacement:
1. Remove the two wires from the solenoid valve.
2. Turn off the water supply to the dispenser.
3. Disconnect the water lines to and from the solenoid
valve.
4. Remove the two #8-32 screws securing the sole-
noid to the dispenser base. Remove solenoid.
5. Install new solenoid valve on the dispenser base
and secure with the two #8-32 screws.
6. Securely fasten the water lines to and from the
solenoid valve.
P1445.40
FIG. 63 INLET SOLENOID VALVE
Location:
The inlet solenoid is located inside on the rear of
the dispenser base.
7. Refer to Schematic Wiring Diagrams when recon-
necting the wires.
Test Procedures:
1. Disconnect the dispenser from the power
BRN to Control Board
WHI to Control Board
source.
2. Disconnect the two wires from the solenoid
valve.
120V 1.2 kΩ
230V 3.84 kΩ
3. Check for continuity across the solenoid valve coil
terminals.
If continuity is present as described, reconnect the two
wires to the solenoid.
If continuity is not present as described, replace the
solenoid valve.
4. Check the solenoid valve for coil action. Connect
the dispenser to the power source. Listen carefully
in the vicinity of the solenoid valve for a “clicking”
sound as the coil magnet attracts.
5. Disconnect the dispenser from the power source.
P1217
FIG. 64 INLET SOLENOID VALVE TERMINALS
49179 110613
45
SERVICE (CONT.)
Temperature Probe (all Models)
Removal and Replacement:
1. Disconnect the dispenser from the power source.
2. Remove the top rear cover.
3. Disconnect the two pin connector from the dis-
penser main wiring harness.
4. Remove the temperature probe by firmly pulling-
up on the tube at the tank lid. This will disengage
the grommet from the tank lid.
5. Slide a new grommet on to the new temperature
probe.
6. Insert the temperature probe through the hole
in the tank lid and press the grommet firmly and
evenly so that the groove in the grommet fits into
the tank lid.
7. Reconnect the two pin connector to the dispenser
main wiring harness.
FIG. 65 TEMPERATURE PROBE
BLKorORNpin1
WHI pin 2
Location:
The temperature probe is located on the top of the
tank assembly.
Test Procedure:
1. Disconnect the dispenser from the power source.
2. Remove the top rear cover.
3. With a voltmeter, back probe the connector from
the temperature probe.
4. Connect the dispenser to the power source.
5. See the chart for voltage readings.
6. For continuity check, disconnect the dispenser
from the power source.
FIG. 66 TEMPERATURE PROBE
7. Disconnect the two pin connector from the dis-
penser main wiring harness.
TEMP
RESISTANCE
0 Ω
VOLTAGE
0VDC
8. With an ohmmeter, check for continuity across
the pins for the black and white wires.
9. See the chart for resistance/voltage readings. Al-
ternate check: Leave two pin connector plugged
in, place dc voltmeter across two pin connector in
parallel, check voltage with dispenser running.
10. Verify wiring to probe.
11. If readings are not present as described, replace
the temperature probe.
NOTE: Some meters have difficulty measuring a sen-
sor either rapidly rising or falling in temperature.
SHORTED
32° F
0.0° C
31.2k - 34k Ω
3.0VDC
77° F
25.0° C
9.8k - 10.2k Ω
INFINITE
1.5VDC
5.0VDC
OPEN
NOTE: ALL FIGURES LISTED ABOVE ARE APPROXIMATE.
49179 012214
46
SERVICE (CONT.)
Temperature Sensor (all Models)
Removal and Replacement:
1. Remove the left side housing panel.
2. Disconnect the plug on the temperature sensor
leads from the connector on the dispenser main
harness.
3. Open the cabinet door and remove the product
containers.
4. Remove the cabinet fan and fan guard assembly.
5. Clip off the connector and pull the temperature
sensor from the top left rear of the cabinet and
discard.
6. Push new temperature sensor wires into the grom-
met at the top left rear of the cabinet and secure to
sensor mounting clip.
FIG. 67 TEMPERATURE SENSOR
7. Refer to Fig. 68 and connect the wires to the new
plug.
8. Connect the sensor plug to the connector from the
main harness.
Location:
TheTemperatureSensorislocatedinsidethecabinet
between the fan and the water coil.
9. Reinstall the cabinet fan and guard assembly.
10. Reinstall the left side housing panel.
Test Procedures:
1. Remove the left side housing panel.
2. Connect a voltmeter across the two leads of the
temperature sensor (leave plug connected);
The indication must be:
1. BLK to GRY J7-1
(Control Board) Positive
a) Approx. 1.4 vdc @ 71° F
b) Approx. 2.6 vdc @ 32° F
2. BLK to WHI/BLK J7-2
(Control Board) Negative
If voltage reading is 0v, the Control Board is not sup-
plying the necessary 5v and should be replaced. If the
reading stays at 5vdc, replace sensor.
2
1
Alternate Test:
FIG. 68 TEMPERATURE SENSOR
2. Disconnect the plug on sensor leads and check
resistance as indicated in chart.
TEMP
RESISTANCE
0 Ω
VOLTAGE
If resistance reading is not within the range listed in
chart, replace sensor.
SHORTED
0VDC
32° F
0° C
1.5k Ω
2.5VDC
77° F
350 Ω
1.1VDC
5.0VDC
25.0° C
OPEN
INFINITE
NOTE: ALL FIGURES LISTED ABOVE ARE APPROXIMATE.
49179 020514
47
SERVICE (CONT.)
Transformer (all Models)
Removal and Replacement:
1. Loosen the two #8-32 screws securing the com-
ponent bracket to the dispenser housing base.
2. Pullcomponentbracketoutthefrontofthedispenser
far enough so the transformer can be disconnected
from the main wiring harness.
C
A
+
C
A
3 Remove the two #6-32 keps nuts securing the
transformer to the component bracket.
5. Remove and discard the transformer.
6. Install new transformer on the component bracket
and secure with two #6-32 keps nuts.
7. Refer to Fig. 70 and connect the transformer to the
main wiring harness.
8. Place the component bracket into position and
tighten the two #8-32 screws.
P3864
FIG. 69 TRANSFORMER
Location:
The transformer is located on the electrical com-
ponent mounting bracket on the lower front of the
dispenser behind the splash panel.
Test Procedure:
1. Disconnect the dispenser from the power source.
2. Check the voltage across black wire and the white
wire from the main harness. Connect the dispenser
to power source. The indication must be:
a) 120 volts ac for two wire 120 volt models, three
wire 120/208 volt and three wire 120/240 volt
models.
b) 240 volts ac for two wire 240 volt models.
c) 230 volts ac for two wire 230 volt models.
4. Disconnect the dispenser from the power source.
WHI from
WHI/BLU to Control
Board J6-1,J12-1
Power Cord
BLK from
Power Cord
If voltage is present as described, proceed to #5.
Ifvoltageisnotpresentasdescribed,refertotheWiring
Diagrams and check the main wiring harness.
5. Check the voltage between J6-1 and J6-3 at the
control board. Connect the dispenser to the power
source. The indication must be 24 volts ac.
If voltage is present as described the transformer is
operating properly.
If voltage is not present as described, replace the
transformer.
BLU to Control
Board J6-3,J12-3
P1647
FIG. 70 TRANSFORMER TERMINALS
49179 110613
48
SERVICE (CONT.)
Transformer - Lited Doors (JDF-2S, JDF-4S)
Removal and Replacement:
1. Loosen the two #8-32 screws securing the com-
ponent bracket to the dispenser housing base.
2. Pullcomponentbracketoutthefrontofthedispenser
far enough so the transformer connector can be
disconnected from the main wiring harness.
3 Disconnectthetransformerfourpinconnectorfrom
the four pin plug on the main wiring harness.
4. Remove the two #6-32 keps nuts securing the
transformer to the component bracket.
C
A
+
C
A
P3864
5. Remove and discard the transformer.
FIG. 71 TRANSFORMER
Location:
The transformer is located on the electrical com-
ponent mounting bracket on the lower front of the
dispenser behind the splash panel.
6. Install new transformer on the component bracket
and secure with two #6-32 keps nuts.
7. Connect the four pin connector on the transformer
to four pin plug on the main wiring harness.
8. Place the component bracket into position and
tighten the two #8-32 screws.
Test Procedure:
1. Disconnect the dispenser from the power source.
2. Disconnectthefourpinplugfromthemainharness
from the four pin connector on the transformer.
3 Check the voltage across black wire pin 1 and the
white wire pin 2 on the plug from the main har-
ness. Connect the dispenser to power source. The
indication must be:
WHI/GRN - T8
WHI/BLK - T12
a) 120 volts ac for two wire 120 volt models, three
wire 120/208 volt and three wire 120/240 volt
models.
b) 240 volts ac for two wire 240 volt models.
c) 230 volts ac for two wire 230 volt models.
4. Disconnect the dispenser from the power source.
WHI - 120V T2, 240V T6
BLK - TI
If voltage is present as described reconnect the plug
and the connector and proceed to #5.
Ifvoltageisnotpresentasdescribed,refertotheWiring
Diagrams and check the main wiring harness.
P1647
FIG. 72 TRANSFORMER TERMINALS
5. Check the voltage between J3-5 and J3-6 on the
six pin connector at the control board. Connect the
dispenser to the power source. The indication must
be 24 volts ac.
If voltage is present as described the transformer is
operating properly.
If voltage is not present as described, replace the
transformer.
49179 110613
49
Triac Map
1. Compressor Relay Q25
2. Station 2 Water Q27
10
9
1
3. Station 1 Water Q28
4. Station 1 Concentrate Q23
5. Station 2 Concentrate Q18
6. Station 3 Concentrate Q17
7. Station 4 Concentrate Q13
8. Station 3 Water Q7
2
8
7
6
9. Cold Water Valve Q11
10. Inlet Water Valve Q10
11. Station 4 Water Q8
5
4
3
11
49179 012214
50
ELECTRICAL SCHEMATIC DIAGRAM for JDF-2S
(Models with LED Lited Doors)
B L K
_
R E D
+
B R N
W H I
W H I / G R N
B R N / W H I
B L U
B R N
G R N / Y E L
B L K
B L K
W H I
B L K
1
W H I
B L K
Y E L
J 1 - 5
B R N
W H I
W H I / B L K
B L K
W H I
J 1 - 1
Y E L
J 5 - 5
J 5 - 1
J 1 - 3
J 1 - 1
J 4 - 5
J 4 - 1
J 3 - 5
S M A L L
R U N
M E D I U M
L A R G E
S T O P / P L U S
D I S P E N S E
T
A R S T
J 3 - 1
J 2 - 5
S M A L L
M E D I U M
L A R G E
G R N / Y E L - 1 6
S T O P / P L U S
D I S P E N S E
J 2 - 1
49179 110613
51
ELECTRICAL SCHEMATIC DIAGRAM for JDF-2S
(Models with Flourescent Lited Doors)
W
W
B R N
W H I
D
K
R E
B L
W
W
B R N
W H
D
K
R E
B L
I
G R N
B L
W H I
W H I / B L K
W H I / G R N
B L K
W H I
U
U
B L
B L
K
K
B L
B L
B L U o r B R N
D
R E
N
B L
G R
W H I
G R N
W H I
G R N
W H I / G R N
B R N / W H I
U
N
B L
B R
L
G R N / Y E
B L K
B L K
W H I
B L K
1
W H I
B L K
J 1 - 5
J 1 - 1
B R N
K
W H I / B L
B L K
W H I
J 5 - 5
J 5 - 1
J 1 - 3
J 1 - 1
J 4 - 5
J 4 - 1
J 3 - 5
L
S M A L
R U N
M E D I U M
L A R G E
S T O P / P L U S
D I S P E N S E
T
A R S T
J 3 - 1
J 2 - 5
L
S M A L
M E D I U M
L A R G E
6
G R N / Y E L - 1
S T O P / P L U S
D I S P E N S E
J 2 - 1
49179 110613
52
ELECTRICAL SCHEMATIC DIAGRAM for JDF-4S
(Models with LED Lited Doors)
120V
MODELS
220-230V
MODELS
SCHEMATIC WIRING DIAGRAM JDF-4S
L1
N
GRN
GND L1
N
EMI
FILTER
A
A
B
B
A
A
B
B
TRANSFORMER
BLK
BLU
L
O
A
D
L
I
N
E
WHI
WHI/BLU
TRANSFORMER
BLU
L
O
A
D
L
I
N
E
BLK
WHI
WHI/BLU
COMPRESSOR ASSY
COMPRESSOR
BLU/BLK
MOTOR
LIMIT
THERM.
COLD WATER
VALVE
WHI
WHI/BLK
K1
WHI/VIO
WHI
SOL
3
4
2
6
5
N
PTC
ASSY
1
WHI
CONDENSOR FAN
BLU/BLK
MOTOR
REFRIGERATION
SWITCH
BLU/BLK
RED/BLK
RED/BLK
BLK
WATER INLET
VALVE
K1
WHI
RED/BLK
RECIR.
PUMP
BRN
WHI
SOL
STATION 1
DISPENSE
STATION 2
DISPENSE
GRN
RED
VIO
RED
ORN
PUMP
PUMP
RED
WHI/RED
RED
BLK
J3-1
J3-2
FAN
1
WHI/VIO
WHI/VIO
GRY
WHI/BLK
J7-1
J7-2
RED
ORN
J2-1
J2-6
BLK or ORN
WHI
1
VIO
J9-1
J9-2
VIO
WHI/ORN
YEL
VIO
WHI/ORN
YEL
YEL
WHI/ORN
WHI/VIO
CABINET
THERMISTOR
STATION 1
DISPENSE
STATION 2
DISPENSE
CONTROL
t
RED
ORN
RED
ORN
WHI/VIO
WHI/ORN
YEL
VIO
YEL
SOL
SOL
t
12
1
WATER BATH
THERMISTOR
STATION 3
DISPENSE
STATION 4
DISPENSE
P
C
Models with Lited Doors
RED
RED
ORN
RED
BLK
PUMP
PUMP
BOARD
COLD WATER
DISPENSE
SWITCH
Models with Mechanical Switches
WHI/VIO
TAN
WHI/GRN
GRN
BLU
BLK
J13-1
J13-6
PNK
VIO
WHI/ORN
YEL
PNK
BLU
GRY
GRY
BLU
TAN
STATION 4
DISPENSE
SWITCH
STATION 3
DISPENSE
STATION 4
DISPENSE
8
RED
ORN
WHI/GRN
GRN
BLK
BLK
BLK
BLK
ORN
YEL
RED
BLK
WHI/VIO
WHI/ORN
YEL
YEL
YEL
ORN
BLU
J15-1
SOL
SOL
12
WHI/BLU
STATION 3
DISPENSE
SWITCH
J6-1
J15-4
J5-1
BLU
J6-3
GRN or GRY
RED
BLK
BLK
WHI/BLU
J12-1
J12-3
1
BLU
J5-4
STATION 2
DISPENSE
SWITCH
Models with Membrane Switches
BLK
RED
BLU
YEL
ORN
BLK
RED
BLU
YEL
J6-1
J6-5
J11-1
J11-5
AUXILLARY
CONTROL BOARD
RED
GRN
ORN
Regulator
Board
J8-2
J8-1
STATION 1
DISPENSE
SWITCH
RED
BLK
RED
BLK
J2-1
J3-1
J1-1
YEL
STATIC
SHIELD
STATIC
SHIELD
STATIC
SHIELD
STATIC
SHIELD
STATIC
SHIELD
BLK
BLK
DISPENSE
STATION
#1
DISPENSE
STATION
#2
DISPENSE
STATION
#3
COLD
WATER
SWITCH
DISPENSE
STATION
#4
PUSH BUTTON OPTION
WHI
BRN
GRN
WHI
BRN
GRN
BLK
BLK
PROGRAM
SWITCH
BRN
BRN
STATIC
SHIELD
STATIC
SHIELD
STATIC
SHIELD
STATIC
SHIELD
STATIC
SHIELD
Chassis
Ground
Door
Ground
DISPENSE
LOCKOUT
SWITCH
DISPENSE
LOCKOUT
SWITCH
Chassis
Ground
COLD
WATER
SWITCH
DISPENSE
STATION
#1
DISPENSE
STATION
#2
DISPENSE
STATION
#3
DISPENSE
STATION
#4
120 VOLTS AC
or
220-230 VOLTS AC
2 WIRE
SINGLE PHASE
4
49179 110613
53
ELECTRICAL SCHEMATIC DIAGRAM for JDF-4S
(Models with Flourescent Lited Doors)
I
I
W
W
B R N
W H
D
K
R E
B L
I
I
I
W
W
B R N
W H
G R
D
K
R E
B L
I
N
K
B L
K
N
W H I / B L
W H I / G R
K
B L
I
W H
I
W H
U
U
B L
B L
K
K
B L
B L
N
V I O o r B R
D
R E
N
V I
R N
I
N
W H
G R
I
N
W H
G R
I
I
W H
B L
U
N
B L
B R
K
K
G R N / Y E L
K
K
B L
B L
W H
B L
1
I
W H
B L
K
J 1 - 5
J 1 - 1
B R N
W H I / B L
B L
W H
W H I / V I O
K
K
I
J 5 - 5
L
S M A L
M E D I U M
L A R G E
S T O P / P L U S
D I S P E N S E
D I S P E N S E
J 5 - 1
J 1 - 3
D I S P E N S E
J 1 - 1
J 4 - 5
L
L
L
S M A L
M E D I U M
L A R G E
S T O P / P L U S
D I S P E N S E
D I S P E N S E
D I S P E N S E
J 4 - 1
J 3 - 5
R U N
S M A L
T
A R S T
M E D I U M
L A R G E
S T O P / P L U S
J 3 - 1
J 2 - 5
G R N / Y E L - 1 6
S M A L
M E D I U M
L A R G E
S T O P / P L U S
J 2 - 1
49179 110613
54
ELECTRICAL SCHEMATIC DIAGRAM for JDF-4D
(Press & Release Models)
120V
MODELS
230V
MODELS
L1
N
GRN
GND L1
N
EMI
FILTER
A
A
B
B
A
B
TRANSFORMER
BLK
WHI
BLU
A
B
L
O
A
D
L
I
N
E
WHI/BLU
TRANSFORMER
BLU
L
O
A
D
L
I
N
E
BLK
WHI
WHI/BLU
COMPRESSOR ASSY
BLU/BLK
COMPRESSOR
MOTOR
LIMIT
THERM.
COLD WATER
VALVE
WHI
WHI/BLK
K1
3
4
2
6
5
WHI
N
WHI/VIO
WHI
SOL
PTC
ASSY
1
CONDENSOR FAN
WHI
BLU/BLK
MOTOR
REFRIGERATION
SWITCH
BLU/BLK
RED/BLK
RED/BLK
BLK
WATER INLET
VALVE
K1
WHI
RED/BLK
RECIR.
PUMP
BRN
WHI
SOL
STATION 1
DISPENSE
GRN
PUMP
RED
WHI/RED
RED
BLK
J3-1
J3-2
FAN
FAN
RED
BLK
STATION 2
DISPENSE
PUMP
PUMP
PUMP
1
6
VIO
ORN
RED
PNK
ORN
VIO
ORN
RED
PNK
ORN
WHI/GRN
J2-1
GRY
WHI/BLK
J7-1
J7-2
STATION 3
DISPENSE
BLK
WHI
1
J9-1
J9-2
WHI/GRN
J2-6
STATION 4
DISPENSE
C
O
N
T
CABINET
THERMISTOR
t
R
O
L
t
STATION 1
DISPENSE
SOL
SOL
SOL
SOL
WATER BATH
THERMISTOR
P
C
B
O
A
R
D
WHI-22
STATION 2
DISPENSE
J8-1
1
BLK-22
CLOCK
1
6
WHI/VIO
WHI/ORN
YEL
TAN
BLU
WHI/VIO
WHI/ORN
YEL
TAN
BLU
J13-1
J13-6
STATION 3
DISPENSE
GRY
GRY
STATION 4
DISPENSE
J15-1
WHI/BLU
J6-1
J15-4
BLU
J6-3
J5-1
WHI/BLU
J12-1
J12-3
BLK
BLK
BLU
J5-4
Models with Membrane Switches
J10-1
BLK
BLK
RED
BLU
YEL
J6-1
J11-1
J11-5
WHI/GRN
RED
BLU
YEL
ORN
AUXILLARY
CONTROL BOARD
BLU
TAN
WHI/ORN
WHI/VIO
ORN
J6-5
J8-1
J10-7
J8-6
J9-1
BLK
J9-4
RINSE
SWITCH
1
22
BLK
DISPENSE
LOCKOUT
SWITCH
STATIC
COOLING
POWER
LED
SHIELD
LED
DISPENSE
SWITCH
#1
DISPENSE
SWITCH
#2
DISPENSE
SWITCH
#3
DISPENSE
SWITCH
#4
DISPENSE
NOZZLE
#1
DISPENSE
NOZZLE
#2
DISPENSE
NOZZLE
#3
DISPENSE
NOZZLE
#4
120 VOLTS AC
or
230 VOLTS AC
2 WIRE
SINGLE PHASE
WHI/VIO
WHI/ORN
TAN
BLU
WHI/GRN
49179 110613
55
ELECTRICAL SCHEMATIC DIAGRAM for JDF-4D
(Portion Control Models)
120V
MODELS
220-230V
MODELS
L1
N
GRN
GND L1
N
EMI
FILTER
A
A
B
B
A
A
B
B
TRANSFORMER
BLK
WHI
BLU
L
O
A
D
L
I
N
E
WHI/BLU
TRANSFORMER
BLU
L
O
A
D
L
I
N
E
BLK
WHI
WHI/BLU
COMPRESSOR ASSY
BLU/BLK
COMPRESSOR
MOTOR
LIMIT
THERM.
COLD WATER
VALVE
WHI
WHI/BLK
K1
3
4
2
6
5
WHI
N
WHI/VIO
WHI
SOL
PTC
ASSY
1
CONDENSOR FAN
WHI
BLU/BLK
MOTOR
REFRIGERATION
SWITCH
BLU/BLK
RED/BLK
RED/BLK
BLK
WATER INLET
VALVE
K1
WHI
RED/BLK
RECIR.
PUMP
BRN
WHI
SOL
STATION 1
DISPENSE
GRN
PUMP
RED
WHI/RED
RED
BLK
J3-1
J3-2
FAN
FAN
RED
BLK
STATION 2
DISPENSE
PUMP
PUMP
PUMP
1
6
VIO
ORN
RED
PNK
ORN
VIO
ORN
RED
PNK
ORN
WHI/GRN
J2-1
GRY
WHI/BLK
J7-1
J7-2
STATION 3
DISPENSE
BLK
WHI
1
J9-1
J9-2
WHI/GRN
J2-6
CONTROL
STATION 4
DISPENSE
CABINET
THERMISTOR
t
t
STATION 1
DISPENSE
SOL
SOL
SOL
SOL
WATER BATH
THERMISTOR
P
C
BOARD
WHI-22
BLK-22
STATION 2
DISPENSE
J8-1
1
CLOCK
1
6
WHI/VIO
WHI/ORN
YEL
TAN
BLU
WHI/VIO
WHI/ORN
YEL
TAN
BLU
J13-1
J13-6
STATION 3
DISPENSE
GRY
GRY
STATION 4
DISPENSE
J15-1
WHI/BLU
J6-1
J15-4
J5-1
BLU
J6-3
WHI/BLU
J12-1
J12-3
BLK
BLK
BLU
J5-4
Models with Membrane Switches
BLK
BLK
RED
BLU
YEL
J6-1
J6-5
J11-1
J11-5
WHI/GRN
J8-1
J8-6
RED
BLU
YEL
ORN
J10-1
POWER LED
BLU
TAN
WHI/ORN
WHI/VIO
ORN
J10-7
COOLING LED
J9-1
J9-4
AUXILLARY
CONTROL BOARD
RINSE
SWITCH
BLK
BLK
DISPENSE
LOCKOUT
SWITCH
STATIC
SHIELD
STATIC
SHIELD
STATIC
SHIELD
STATIC
SHIELD
STATIC
SHIELD
DISPENSE
STATION
#1
DISPENSE
STATION
#2
DISPENSE
STATION
#3
COLD
WATER
SWITCH
DISPENSE
STATION
#4
DISPENSE
NOZZLE
#1
DISPENSE
NOZZLE
#2
DISPENSE
NOZZLE
#3
DISPENSE
NOZZLE
#4
120 VOLTS AC
or
220-230 VOLTS AC
2 WIRE
SINGLE PHASE
WHI/VIO
WHI/ORN
TAN
4
BLU
WHI/GRN
49179 110613
56
ELECTRICAL SCHEMATIC DIAGRAM
for JDF-4S-SB
120V
MODELS
230V
MODELS
L1
N
GRN
GND L1
N
EMI
FILTER
A
A
B
B
A
A
B
B
TRANSFORMER
BLK
WHI
BLU
L
O
A
D
L
I
N
E
WHI/BLU
MAIN POWER
ON/OFF
SWITCH
TRANSFORMER
BLK
WHI
BLK
WHI
BLU
L
O
A
D
L
I
N
E
BLK
WHI
WHI/BLU
COMPRESSOR ASSY
COMPRESSOR
BLU/BLK
MOTOR
LIMIT
THERM.
COLD WATER
VALVE
WHI
WHI/BLK
K1
WHI/VIO
WHI
SOL
3
4
2
6
5
N
PTC
ASSY
1
CONDENSOR FAN
WHI
BLU/BLK
MOTOR
BLU/BLK
RED/BLK
RED/BLK
BLK
WATER INLET
VALVE
K1
REFRIGERATION
SWITCH
RECIR.
PUMP
BRN
WHI
WHI
1
RED/BLK
STATION 1
DISPENSE
STATION 2
DISPENSE
SOL
GRN
RED
VIO
RED
ORN
PUMP
PUMP
RED
WHI/RED
RED
BLK
J3-1
J3-2
FAN
WHI/VIO
WHI/VIO
GRY
WHI/BLK
J7-1
J7-2
RED
J2-1
ORN
VIO
YEL
BLK or ORN
WHI
1
J9-1
J9-2
VIO
WHI/ORN
YEL
VIO
WHI/ORN
YEL
WHI/ORN
CABINET
THERMISTOR
WHI/VIO
STATION 1
DISPENSE
STATION 2
DISPENSE
J2-6
CONTROL
t
RED
ORN
RED
ORN
WHI/VIO
WHI/ORN
YEL
VIO
YEL
SOL
SOL
t
12
1
WATER BATH
THERMISTOR
6
STATION 3
DISPENSE
STATION 4
DISPENSE
BLK
STATIC
SHIELD
P
C
RED
RED
ORN
DISPENSE
STATION
#4
PUMP
PUMP
BOARD
ORN
BLK
WHI/VIO
TAN
DISPENSE
BLK
BLK
BLK
BLK
BLK
1
6
WHI/GRN
GRN
J13-1
J13-6
PNK
VIO
WHI/ORN
YEL
PNK
BLU
GRY
BLK
STATIC
SHIELD
GRY
BLU
TAN
DISPENSE
STATION
#3
STATION 3
DISPENSE
STATION 4
DISPENSE
8
YEL
BLK
RED
ORN
WHI/GRN
GRN
WHI/VIO
WHI/ORN
YEL
YEL
YEL
DISPENSE
J15-1
SOL
SOL
ORN
ORN
1
6
BLU
12
WHI/BLU
J6-1
YEL
RED
GRN
BLK
BLK
J15-4
J5-1
BLU
J6-3
GRN
RED
BLK
BLK
BLK
STATIC
SHIELD
WHI/BLU
J12-1
J12-3
1
DISPENSE
STATION
#2
BLU
J5-4
RED
BLK
DISPENSE
BLK
BLK
BLK
BLK
BLK
J11-1
J11-5
1
6
120 VOLTS AC
or
230 VOLTS AC
2 WIRE
BLK
STATIC
SHIELD
BLK
DISPENSE
STATION
#1
SINGLE PHASE
BLK
DISPENSE
LOCKOUT
SWITCH
GRN
BLK
DISPENSE
1
49179 110613
57
|