BUNN JDF-2S 120V Lit Two Segment Graphic Door PH Service Manual

JDF-2S, JDF-4S

Silver Series

®

JDF-2S & JDF-4S PH or PC with Non LIT or LIT Graphic Door

JDF-2S & JDF-4S PH or PC with LIT Segment Door

SERVICE & REPAIR MANUAL

Bunn-O-Matic Corporation

Post Office Box 3227, Springfield, Illinois 62708-3227

Phone (217) 529-6601 | Fax (217) 529-6644

49179.0000 G 10/19 © 2013 Bunn-O-Matic Corporation

BUNN-O-MATIC COMMERCIAL PRODUCT WARRANTY

Bunn-O-Matic Corp. (“BUNN”) warrants equipment manufactured by it as follows:

1) Airpots, thermal carafes, decanters, GPR servers, iced tea/coffee dispensers, MCR/MCP/MCA single cup brewers, thermal servers and ThermoFresh® servers (mechanical and digital) 1 year parts and 1 year labor.

2) All other equipment - 2 years parts and 1 year labor plus added warranties as specified below: a) Electronic circuit and/or control boards - parts and labor for 3 years.

b) Compressors on refrigeration equipment - 5 years parts and 1 year labor.

c) Grinding burrs on coffee grinding equipment to grind coffee to meet original factory screen sieve analysis - parts and labor for 4 years or 40,000 pounds of coffee, whichever comes first.

These warranty periods run from the date of installation BUNN warrants that the equipment manufactured by it will be commercially free of defects in material and workmanship existing at the time of manufacture and appearing within the applicable warranty period. This warranty does not apply to any equipment, component or part that was not manufactured by BUNN or that, in BUNN’s judgment, has been affected by misuse, neglect, alteration, improper installation or operation, improper maintenance or repair, non periodic cleaning and descaling, equipment failures related to poor water quality, damage or casualty. In addition, the warranty does not apply to replacement of items subject to normal use including but not limited to user replaceable parts such as seals and gaskets. This warranty is conditioned on the Buyer 1) giving BUNN prompt notice of any claim to be made under this warranty by telephone at (217) 529-6601 or by writing to Post Office Box

3227, Springfield, Illinois 62708-3227; 2) if requested by BUNN, shipping the defective equipment prepaid to an authorized

BUNN service location; and 3) receiving prior authorization from BUNN that the defective equipment is under warranty.

THE FOREGOING WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ANY OTHER WARRANTY, WRITTEN OR ORAL, EX-

PRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF EITHER MERCHANTABILITY OR

FITNESS FOR A PARTICULAR PURPOSE.

The agents, dealers or employees of BUNN are not authorized to make modifications to this warranty or to make additional warranties that are binding on BUNN. Accordingly, statements by such individuals, whether oral or written, do not constitute warranties and should not be relied upon.

If BUNN determines in its sole discretion that the equipment does not conform to the warranty, BUNN, at its exclusive option while the equipment is under warranty, shall either 1) provide at no charge replacement parts and/or labor (during the applicable parts and labor warranty periods specified above) to repair the defective components, provided that this repair is done by a BUNN Authorized Service Representative; or 2) shall replace the equipment or refund the purchase price for the equipment.

THE BUYER’S REMEDY AGAINST BUNN FOR THE BREACH OF ANY OBLIGATION ARISING OUT OF THE SALE OF THIS

EQUIPMENT, WHETHER DERIVED FROM WARRANTY OR OTHERWISE, SHALL BE LIMITED, AT BUNN’S SOLE OPTION

AS SPECIFIED HEREIN, TO REPAIR, REPLACEMENT OR REFUND.

In no event shall BUNN be liable for any other damage or loss, including, but not limited to, lost profits, lost sales, loss of use of equipment, claims of Buyer’s customers, cost of capital, cost of down time, cost of substitute equipment, facilities or services, or any other special, incidental or consequential damages.

392, A Partner You Can Count On, Air Infusion, AutoPOD, AXIOM, BrewLOGIC, BrewMETER, Brew Better Not Bitter, Brew-

WISE, BrewWIZARD, BUNN Espress, BUNN Family Gourmet, BUNN Gourmet, BUNN Pour-O-Matic, BUNN, BUNN with the stylized red line, BUNNlink, Bunn-OMatic, Bunn-O-Matic, BUNNserve, BUNNSERVE with the stylized wrench design,

Cool Froth, DBC, Dr. Brew stylized Dr. design, Dual, Easy Pour, EasyClear, EasyGard, FlavorGard, Gourmet Ice, Gourmet

Juice, High Intensity, iMIX, Infusion Series, Intellisteam, My Café, Phase Brew, PowerLogic, Quality Beverage Equipment

Worldwide, Respect Earth, Respect Earth with the stylized leaf and coffee cherry design, Safety-Fresh, savemycoffee.com,

Scale-Pro, Silver Series, Single, Smart Funnel, Smart Hopper, SmartWAVE, Soft Heat, SplashGard, The Mark of Quality in

Beverage Equipment Worldwide, ThermoFresh, Titan, trifecta, TRIFECTA (sylized logo), Velocity Brew, Air Brew, Beverage

Bar Creator, Beverage Profit Calculator, Brew better, not bitter., Build-A-Drink, BUNNSource, Coffee At Its Best, Cyclonic

Heating System, Daypart, Digital Brewer Control, Element, Milk Texturing Fusion, Nothing Brews Like a BUNN, Picture

Prompted Cleaning, Pouring Profits, Signature Series, Sure Tamp, Tea At Its Best, The Horizontal Red Line, Ultra are either trademarks or registered trademarks of Bunn-O-Matic Corporation. The commercial trifecta® brewer housing configuration is a trademark of Bunn-O-Matic Corporation.

2 49179 031314

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.

3 49179 110613

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 product containers to disconnect them from the machine inlet.

2. Close door, place an empty container under the dispense nozzles.

3. Dispense from each station until clear water flows from the dispense nozzle.

4. Open dispenser door and reconnect all product containers.

5. Remove dispense nozzles and drip tray. Wash all parts in warm soapy water.

6. With a warm/soapy cloth, wipe down interior of cabinet and splash panel area behind dispensing nozzles.

7. Replace drip tray and dispense nozzles.

8. Dispense from each station until finished product flows from the dispense nozzles.

4 49179 110613

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

32732.0000 Clamp

32656.0000

.39"/.48"

21275.0003 Clamp

34325.0032

Fitting, Elbow .25" Barb x .38" Barb

.57"/.70"

Hose, Flex .38" ID x 5.25" lg

5 49179 110613

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 personnel.

• 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

Cold Water Circulation

Dispense stations not working.

Note: Cooling failure or excessive cabinet temperatures for more than 4 hours will result in dispense lockout or no dispense.

Note: Reset fault/timer by unplugging unit.

PROBABLE CAUSE

1. Cabinet cooling fan.

2. Bath recirculation pump.

REMEDY

Replace fan (24vdc).

Note: Fan receives power when the dispenser is powered.

A) If not running, check refrigeration switch and wiring for proper continuity.

B) Check for 120V or 230V AC at pump. Replace pump.

3. Restricted water flow to cabinet water coil and bath.

Check for kinked hose.

6 49179 110613

TROUBLESHOOTING (Continued)

PROBLEM

Dispenser Locked Out


Cooling system failure.

PROBABLE CAUSE

Refrigeration


Note: Cooling failure or excessive bath and cabinet temperatures for more than 4 hours will result in dispense lockout or no dispense.

1. Compressor ON/OFF switch.

2. Dirty condenser filter or fins.

REMEDY

Check for "ON" position or no continuity - replace switch.

Clean filter and fins or replace condenser filter. (Filter not supplied on some machines).

3. Condenser fan not running.

A) Check for 120V or 230V AC. Replace 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.

If yes, 120 or 230vac - replace relay.

Note: Relay contacts are normally open.

5. Compressor not running.

Check compressor thermal overload

(N/C). If open check for dirty condenser filter or adequate ventilation and space around machine.

6. Compressor running and not cooling.

Check refrigeration system for leaks and proper charge.

1. Check Dispense Lockout switch.

(A) Set switch to ON position.

(B) Check switch and harness for proper continuity.

1. Refrigeration or cold water recirculation system.

Check all previous items that pretain to refrigeration or cold water recirculation

7 49179 110613


PROBLEM

Dispense station not working

PROBABLE CAUSE REMEDY

1. Dispense Lockout switch set to

OFF position.

Place switch in ON position.

2. Dispense switch failed

All stations dispense concentrate only Main water supply

Check switch and harness for proper continuity.

Check for ON position.

Frozen bath

Inlet water valve failed

A) Compressor relay/contacts shorted - replace relay.

B) Recirculating pump - replace or check for kinked flex line.

A) Check for 120V or 230V power when dispensing. If yes, replace valve. If no, check harness for proper continuity. Then replace circuit board if needed.

8 49179 110613


PROBLEM PROBABLE CAUSE

Dispense station concentrate only

Water solenoid

Dispense station water only

Concentrate out

Product pump not pumping

Pump not turning

REMEDY

Replace solenoid (24vdc) or check wire connection between water valve and main control board.

Replace refill concentrate container or BIB

Check for proper counterclockwise rotation of pump rollers. If counterclockwise, replace pump tubing. If clockwise, wire connection to pump is reversed. Switch wires on terminals.

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 continuity.

Then replace circuit board if needed.

9 49179 110613


PROBLEM

Water leaking beneath machine

Erratic spray during dispense

PROBABLE CAUSE

Water leak filling drip tray or around dispense deck area

1. Initial fill/setup

2. Dispense deck

REMEDY

Some expansion normal. May fill drip tray during initial ice block formation

Inspect or replace fittings clamps, o-rings, solenoids and quick disconnect fittings.

NOTE: Dispense deck area slopes to drain tube that leads to the drip tray.

3. Water pressure greater than 100psi

Install water pressure regulator and reduce to 50 psi.

1. Bath tank overflow.

A) Check all internal water connections.

B) Check internal plumbing connections.

2. Condensation from cabinet cooling coil.

Check for routing of condensation tube to water bath.

Dispense nozzle mixer missing or broken

Replace mixer.

Replace dispense deck solenoid.

Dispense solenoid.

Dispense nozzle dripping water

10 49179 110613


PROBLEM

Unit is not working

Difficulty brixing and/or weak beverage

PROBABLE CAUSE

1. Step-down transformer.

2. Main control board.

1. Product viscosity or too cold.

2. Low water pressure.

3. High water pressure.

REMEDY

Check for 120/24 or 230/24 vac. If no 24vac reading, replace step-down transformer.

If 24 vac present and no LED’s lit, replace control board..

Thorough thaw of product before use

(35° - 40°)

Maintain 20 psi or higher and a minimum flow rate of 1 fl oz/sec.

Over 100 psi, install a pressure regulator and set to 50 psi.

Difficulty brixing and/or weak beverage

4. Dispense valve adjustment setting.

A) Perform 3 second water dispense 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.

Once water is set, adjust motor speed to achieve brix %.

5. Brix ratio.

1. Pump tubing.

2. Use of portable water pump.

Check for proper brix ratio per product using Total Dispense method and or refractometer method.

Inspect, clean, or replace tubing and pump rotor/rollers for ease of rotation.

A) Follow plumbing requirements for pressure and flow rate.

B) Source another portable pump or water supply that meets requirements.

Vacuum leak

Difficulty brixing bag-in-box Inspect all lines and connections from bag-in-box connector to bottle adapter assembly.

11 49179 110613

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 access 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 (Water Bath Thermistor) ...................................................................................46

Temperature Sensor .........................................................................................................................48

Transformer .....................................................................................................................................49

Transformer-Lited Doors ..................................................................................................................50

Circuit Board Triac Map ....................................................................................................................51

Schematic Wiring Diagrams .............................................................................................................52

12 49179 051914

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

13 49179 110613

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

14 49179 110613

SERVICE (CONT.)

Ballast (JDF-2S,4S)

FIG. 3 BALLAST

JDF-2S shown

P1684.40

Location:

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.

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.

5. Remove the wire to the ballast from the back of each bracket.

6. To disengage the ballast wire from the bracket, 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.

7. Repeat for each bracket.

8. White jumper must remain in place on the back of the light socket.

9. Remove screws from each ballast. Remove the green 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 schematic if needed.

12. Snap all 4 bulb sockets back onto light panel. Reinstall fluorescent bulbs.

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.

16. Reconnect power to the unit. Test operation.

Removal and Replacement:


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.

15

FIG. 4 BALLAST TERMINALS

P1219

49179 110613

SERVICE (CONT.)

Cabinet Fan (all Models)

JDF-2S shown


2. Remove the four screws attaching the fan and cover assembly.

3. Gently pull the cover forward and disconnect the

2-pin connector from the main wiring harness.

4. Remove the fan from the cover assembly and discard 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.

Test Procedure:


2. Remove the four screws attaching the fan and cover assembly.

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.

If continuity is present as described, the fan is operating properly.

If continuity is not present as described, replace the fan.


RED

2

1

BLK

FIG. 6 CABINET FAN TERMINALS

P1219

16 49179 110613

SERVICE (CONT.)

LG Compressor (JDF-2S,4S,4D)

P1684.40

FIG. 7 COMPRESSOR

Location:

The compressor is located at the top of the dispenser frame.

1 2 3

GRN Wire

JDF-4S shown

FIG. 8 COMPRESSOR THERMAL

OVERLOAD PROTECTOR LOCATION

1. Compressor Terminal Cover

2. Compressor Relay

3. Thermal Overload Protector

P4298.20

Test Procedures:

Compressor Relay: Refer to FIG. 8


2. Remove compressor terminal cover retainer (1).

3. Connect a voltmeter across the white wire and the blue/black wire. Connect the dispenser to the power 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.


If voltage is present as described, proceed to the following test procedures.

If voltage is not present as described, refer to the

Contactor 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.

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.

Thermal Overload Protector:

1. Check for continuity across the terminals on the thermal overload protector (3).

If continuity is present as described, the thermal overload protector is operating properly.

If continuity is not present as described, replace the thermal overload protector.

17 49179 110613

SERVICE (CONT.)

Compressor (Cont.)


Compressor Relay: Refer to FIG. 8

1. Remove the terminal cover (1)

2. Disconnect the white wire from the compressor relay.

3. Pull relay (2) off of the compressor pins and discard.

4. Push new relay onto the compressor pins.

5. Refer to Fig. 9 and reconnect the wires.

6. Reinstall terminal cover (1).

Compressor Thermal Overload Protector: Refer to

FIG. 8

1. Remove terminal cover (1).

2. Disconnect the BLU/BLK wire of the harness from the thermal overload protector.

3. Remove relay (2).

4. Remove overload protector (3) and discard overload protector.

5. Install new overload protector (3) on to the compressor.

6. Install relay (2).

7. Refer to Fig. 10 and reconnect the thermal overload protector wires.


Compressor Assy:

NOTE: the refrigerant in the system must be reclaimed by a licensed refrigeration repair person.

NOTE:

Before removal of any refrigeration component

When replacing the compressor it is recommended that the dryer also be replaced.

WHI Wire

FIG. 9 RELAY TERMINALS

Plugs into Relay

BLU/BLK Wire

FIG. 10 THERMAL OVERLOAD PROTECTOR

TERMINALS

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 accumulator to the compressor.

9. Reinstall transformer.

10. Evacuate the system.

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 compressor assembly over the four studs in the chassis and remove compressor.

JDF-2S - 9 oz. Type R134A refrigerant.

NOTE:

Design Pressures: High 255 - Low 36 psi

JDF-4S & 4D - 10 oz. Type R134A refrigerant.


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.

18 49179 110613

SERVICE (CONT.)

GD Compressor (JDF-2S,4S,4D)

JDF-4S shown

P1684.40

FIG. 11 COMPRESSOR

Location:


1 3

Test Procedures:

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.











6. Disconnect the two black wires from the compressor start relay.


8. Check for continuity across the upper left terminal and the right pin socket on the rear of the relay.



2 4

FIG.12 COMPRESSOR THERMAL


1. Compressor Start Relay

2. Wiring Harness Strain Relief



P4040.40

Compressor:

1. With the compressor start relay (1) removed, disconnect the black wire from the compressor.

2. Check for continuity across the terminal on the compressor and the left pin on the compressor.







19 49179 110613

SERVICE (CONT.)





2. Disconnect the wires from the compressor start relay.





BLU/BLK

GRN

WHI


FIG. 12


2. Disconnect the BLU/BLK 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.


6. Install new overload protector (3) on to the relay

(1).

7. Install relay (1) and overload protector (2) on the compressor terminal bracket.



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 recommended that the dryer also be replaced.


Plugs into Relay


TERMINALS pressor assembly over the four studs in the chassis and remove compressor.











5. From the right side of the dispenser lift the com-

JDF-2S - 9 oz. Type R134A refrigerant.


JDF-4S & 4D - 10 oz. Type R134A refrigerant.


NOTE: The charging of the system must be done by a licensed refrigeration repair person.


Start Relay.

20 49179 110613

SERVICE (CONT.)

Compressor (JDF-4SB)

P1684.40

FIG. 15 COMPRESSOR

Location:


1 3 2 4

230V shown

Test Procedures:


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.











6. Disconnect the two black wires from the compressor start relay.


8. Check for continuity across the upper left terminal and the right pin socket on the rear of the relay.



5 6

FIG. 16 COMPRESSOR THERMAL


1. Compressor Start Relay

2. Wiring Harness Strain Relief



5. Cable 230V only

6. Capcitor 230V only

7. Cover, Capacitor 230V only

7

P4068

Compressor:

1. With the compressor start relay (1) removed, disconnect the black wire from the compressor.

2. Check for continuity across the terminal on the compressor and the left pin on the compressor.







21 49179 110613

SERVICE (CONT.)





2. Disconnect the wires from the compressor start relay.





BLU/BLK

GRN

WHI





BLU from Capacitor

BRN from Capacitor



FIG. 16


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.


6. Install new overload protector (3) on to the relay

(1).

7. Install relay (1) and overload protector (2) on the compressor terminal bracket.



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 recommended that the dryer also be replaced.

Plugs into Relay


TERMINALS

5. From the right side of the dispenser lift the compressor assembly over the four studs in the chassis and remove compressor.







JDF-4SB - 10 oz. Type R134A refrigerant.


NOTE: The charging of the system must be done by a licensed refrigeration repair person.


Start Relay.

22 49179 110613

SERVICE (CONT.)

Compressor Switch (all Models)

JDF-4S shown



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.


P1684.40

FIG. 19 COMPRESSOR SWITCH

Location:

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.

Test Procedure:


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.

RED/BLK

BLK

P1219

FIG. 20 COMPRESSOR SWITCH TERMINALS

23 49179 110613

SERVICE (CONT.)

Condenser Fan (all Models)

JDF-4S shown


2. Remove the four screws attaching the fan and cover assembly to the refrigeration cabinet.

3. Gently pull the cover assembly forward and disconnect the 2-pin connector from the fan to the main harness.

4. Remove the fan from the cover assembly and discard.

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.


P1684.40

FIG. 21 CONDENSER FAN

Location:

The condenser fan is located inside the main frame below the compressor assembly.

Test Procedure:


2. Disconnect the 2-pin from the fan to the main wiring harness.

3. Check for continuity across the fan terminals.

If continuity is present as described, reconnect the wires to the fan terminals.

If continuity is not present as described, replace the fan.


BLU/BLK

WHI

FIG. 22 CONDENSER FAN TERMINALS

P1219

24 49179 110613

SERVICE (CONT.)

Control Board, Main (all Models)

JDF-4S shown

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:


2. With a voltmeter, back probe check the voltage across pins 1 & 3 of the J6 connector on the wiring harness. Connect the dispenser to the power source. The indication must be 24 volts ac.


If voltage is present as described, proceed to step 4.

If voltage is not present as described, refer to the Wiring

Diagrams and check the dispenser wiring harness back to the transformer (See TRANSFORMER).







1. Remove the four #6-32 screws securing the control board to the component bracket.

2. Disconnect all the plugs on the main wiring harness 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. Install new control board on the component bracket using four #6-32 screws.

NOTE: Verify all ground wires are connected to the grounding stud and secured with nuts.

NOTE: If the main circuit board is being replaced, the technician should also calibrate the water bath thermistor after the new board is installed.

JDF-4S

JDF-2S

FIG. 24 CONTROL BOARD CONNECTORS

25 49179 051914

SERVICE (CONT.)

Portion Control Board (JDF-2S,4S)

FIG. 25 PORTION CONTROL BOARD

P4034.25

Location:

The Portion Control Board is located inside the door cover mounted on the bracket.

Test Procedure:







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. Remove the four #6-20 screws securing the control 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.

J-8

J-7

J-9

J-6

J-1

J-2

J-3

J-4

Cold Water Switch

Left Left Dispense Switch

Left Middle Dispense Switch

Right Middle Dispense Switch

J-5

J-6

Right Right Dispense Switch

Main Harness

J-7 N/A

J-8 N/A

J-9 N/A

J-2

J-3

J-4

J-1

J-5


26 49179 110613

SERVICE (CONT.)

Push Button Control Board (JDF-4D)

PO W

ER

CO

O

LI NG

P4081.25

FIG. 27 PUSH BUTTON CONTROL BOARD

Location:

The Push Button Control Board is located inside the door cover mounted on the bracket.










Test Procedure:






J-9

J-7

J-11

J-10

J-1 N/A

J-6 Main Harness

J-7 N/A

J-9

J-10

J-11

Rinse Switch

Dispense Nozzles (Disable)

Dispense Switches

J-6


27 49179 110613

SERVICE (CONT.)

Portion Control Board (JDF-4D)

PO

W

ER

LI

NG

CO

FIG. 29 PORTION CONTROL BOARD

P4081.25

Location:

The Portion Control Board is located inside the door cover mounted on the bracket.

Test Procedure:















J-8

J-7

J-6

J-1

J-2

J-3

J-4

Cold Water Switch

Left Left Dispense Switch

Left Middle Dispense Switch

Right Middle Dispense Switch

J-5

J-6

Right Right Dispense Switch

Main Harness

J-7 N/A

J-8 N/A

J-9 N/A

J-2

J-3

J-4

J-1

J-5

J-9


28 49179 110613

SERVICE (CONT.)

Circulation Pump (all Models)

FIG. 31 CIRCULATION PUMP

Location:

The Circulation Pump is located on top of the water bath tank cover.

Test Procedure:


2. Disconnect both spade terminals at the recirculating pump. Place meter leads across the harness side that connected to the pump. Connect the dispenser to the power source. Ensure refrigeration switch is turned On, the voltage reading should be applicable to the main power source 120VAC or 230VAC.

No voltage reading, go to refrigeration switch.

3. Install amp clamp around red/black wire going to the recirculating pump. Meter should display around

.30 to .55 amps during operation.

Visually ensure the pump is moving or circulating the water by slightly lifting the silicone tube along side the pump.

No water circulation - replace recircu;lation pump.

Note: Water bath may be completely frozen. Symptom will be no water coming out of any dispense nozzle.


Note: The dispenser will require to be unplugged from power for 48 hours to allow a completely frozen water bath to thaw before recirculation pump can be replaced

1. Remove dispense platform(s) for ease of taking out 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. Remove 2 screws left and right side of the condenser mounting bracket. Remove condenser fan assembly 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

RED/BLK to

Compressor Switch

WHI to Transformer

RED/BLK

WHT

Later Style

120/230VAC

50/60 Hz

Early Style

FIG. 32 CIRCULATION PUMP

P3250.25

29 49179 110613

SERVICE (CONT.)

Dispense Platform Switch (all Models)

JDF-2S shown



2. Loosen the two #8-32 screws securing the component 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. Press the new switch into the component mounting bracket.

6. Connect the two black wires to the switch terminals as shown below.

7. Position the component mounting bracket in the dispenser 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.

Test Procedure:


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.


If voltage is present as described, proceed to step 5.

If voltage is not present as described, refer to the Wiring 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.

BLK to J5-4 to Main Circuit Board

!st Type

BLK to Dispense Switch Harness

ORN to J11-5 to Main Circuit Board

2nd Type

ORN to J6-5 Auxillary CB

BLU to J11-4 to Main Circuit Board

3rd Type

BLU to J6-4 Auxillary CB

FIG. 34 SWITCH TERMINALS

P1640

30 49179 031416

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 resting 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 and secure with four #8-32 x 2.45 screws previously 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. Inspect the pump rotor for signs of wear and replace if necessary.

FIG. 36 DISPENSE PUMP COMPONENTS

P1640

31 49179 110613

SERVICE (CONT.)

Dispense Motor (all Models)


1. Disconnect the two wires from the dispense motor.

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:


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.


If voltage is present as described, replace the motor.



FIG. 38 DISPENSE MOTOR CONNECTORS

32 49179 110613

SERVICE (CONT.)

Dispense Valve (all Models)


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

Location:

The Dispense Valves are located at the front of the platform assembly.

Test Procedure:


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.


If voltage is present as described, replace the valve.



YEL to Control Board

Dispense Station

#1 WHI/VIO

Dispense Station

#2 WHI/ORN

Dispense Station

#3 WHI/VIO

Dispense Station

#4 WHI/ORN

FIG. 40 DISPENSE VALVE CONNECTORS

P3503

33 49179 110613

SERVICE (CONT.)

Dispense Switches (JDF-2S, JDF-4S)

FIG. 41 DISPENSE SWITCHES

Location:

The dispense switches are located on the lower outside of the dispenser door.


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.

BLK

RED

Test Procedure:



3. With a voltmeter, check the voltage across the two wires for each dispense switch. Connect the dispenser to the power source. The indication must be +5 volts dc.

BLK

GRN

Station #2

BLK

ORN

If voltage is present as described, proceed to #4.

If voltage is not present as described, refer to the Wiring Diagrams and check the dispenser wiring harness.

Station #1

BLK

YEL

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) position.

Station #3

FIG. 42 DISPENSE SWITCH TERMINALS

P1449

If continuity is present as described, reconnect the door wiring harness, the switch is operating properly.



34 49179 110613

SERVICE (CONT.)

Cold Water Dispense Switch (JDF-4S only)

FIG. 43 COLD WATER DISPENSE SWITCH

Location:

The cold water dispense switch is located on the lower outside of the dispenser door.

Test Procedure:


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 wires for the dispense switch. Connect the dispenser to the power source. The indication must be +5 volts dc.



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.

BLK

BLU If voltage is present as described, proceed to #4.

If voltage is not present as described, refer to the Wiring 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) position.

If continuity is present as described, reconnect the door wiring harness, the switch is operating properly.



35

FIG. 44 COLD WATER SWITCH TERMINALS

P1449

49179 110613

SERVICE (CONT.)

Dispense Membrane Switch (all Models)

COLD W

ATER

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.


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.

5. Carefully peel the membrane switch from the front of the switch bezel.

6. Remove any excess adhesive from the bezel surface.

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.

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.


2. Remove the rear panel and disconnect ribbon cable.

3. Check for continuity of the switches using pin #1as common.

If continuity is not present when the appropriate switch

#1 Common

#2 ON/STOP

#3 Large

#4 Medium

#5 Small is pressed, the Membrane Switch must be replaced.

If continuity is present, chech the short harness going to J6 on the Control Board.


PORTION CONTROL

FIG. 46 MEMBRANE SWITCH

36 49179 110613

SERVICE (CONT.)

Cold Water Dispense Membrane Switch (all Models)

COLD W

ATER


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.


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.

5. Carefully peel the membrane switch from the front of the switch bezel.

6. Remove any excess adhesive from the bezel surface.


8. Feed the membrane switch harness through the openning and apply the new membrane switch to the switch bezel.

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.


2. Remove the rear panel and disconnect ribbon cable.

3. Check for continuity of the switches using pin #1as common.

If continuity is not present when the appropriate switch

#1 Common

#2 Cold Water 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


COLD W

ATER

37 49179 110613

SERVICE (CONT.)

PH or PC Membrane Switches (without Bezel)


Location:

The membrane switches are located on the lower outside of a standard, 4 lens or graphic door cover.

Each membrane switch connects to a PH or PC switch board (CBA) located on the inner door panel. Switches are connected in logical order from left to right on the switch board (CBA).



2. Remove the 5 outter screws securing the door cover.

4. Disconnect the membrane switch connector from the switch board.

5. Carefully peel the membrane switch from the front of the door cover.

6. Remove any excess adhesive from the surface.


8. Feed the membrane switch ribbon through the openning and apply the new membrane switch to the door surface.

9. Connect the switch ribbon connector to the switch board. Note: Ensure that you are not a pin off in either direction.

1

Test Procedures: Continuity Check



3. Carefully remove door cover and disconnect all membrane switches from switch board (CBA).

4. Locate ribbon connector (membrane switch) being checked. Install red meter lead on the input or station terminal being checked and install black meter lead on common terminal number 1.

Depress the station button, meter should show continuity 0.00 on display or here audible tone and return back to an open connection when depression

is released from switch.

No continuity as described, replace membrane switch.

#1 Common

#2 ON/STOP

#3 Large

#4 Medium

#5 Small

1

PUSH/HOLD

PORTION CONTROL


38 49179 110613

SERVICE (CONT.)

Cold Water Membrane Switch (without Bezel)


Location:

The membrane switches are located on the lower outside of a standard, 4 lens or graphic door cover.

Each membrane switch connects to a PH or PC switch board (CBA) located on the inner door panel. Switches are connected in logical order from left to right on the switch board (CBA).




4. Disconnect the membrane switch connector from the switch board.

5. Carefully peel the membrane switch from the front of the door cover.

6. Remove any excess adhesive from the surface.


8. Feed the membrane switch ribbon through the openning and apply the new membrane switch to the door surface.

9. Connect the switch ribbon connector to the switch board. Note: Ensure that you are not a pin off in either direction.

Test Procedures: Continuity Check



3. Carefully remove door cover and disconnect all membrane switches from switch board (CBA).

4. Locate ribbon connector (membrane switch) being checked. Install red meter lead on the input or station terminal being checked and install black meter lead on common terminal number 1.

Depress the station button, meter should show continuity 0.00 on display or here audible tone and return back to an open connection when depression

is released from switch.

No continuity as described, replace membrane switch.

#1 Common

#2 Cold Water

1

WATER

COLD WATER DISPENSE


39 49179 110613

SERVICE (CONT.)

EMI Filter (all Models)

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:

The EMI Filter is located on the electrical component mounting bracket on the lower front of the dispenser behind the splash panel.

Test Procedure:


2. Disconnect the two black wires and two white wires 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.

If resistance is present as described the EMI Filter is operating properly.

If resistance is not present as described, replace the

EMI Filter.

118.0 kΩ - 118.5 kΩ

Across either pair

FIG. 50 EMI FILTER CONNECTORS

40 49179 110613

SERVICE (CONT.)

Lamps, Holders and Ballast(s) (Early Models)


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 holders.

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:


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 holders.

4. Check for continuity across terminals on each end of the lamp.

If continuity is present as described, continue to step 5.

If continuity is not present as described replace the lamp.

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.


41

FIG. 52 LAMP HOLDERS

49179 110613

SERVICE (CONT.)

LED Lamps (JDF-2S, JDF-4S)

LED regulator board

FIG. 53 LED DOOR LIGHTS

Location:

The LED door lights are located inside the dispenser 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. Check the voltage across the black and red leads ofJ2 or J3 at the LED regulator board with a voltmeter.

Reconnect power to the dispenser. The indication must be 24 volts dc.


If voltage is present as described, the LED regulator board is working correctly.

If voltage is not present as described, go to step 4.

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.

42



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.

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.


J3

J2

J1

White to brown unregulated +30VDC

FIG. 54 LED DOOR LIGHT WIRING

49179 110613

SERVICE (CONT.)

Rectifier (JDF-2S, JDF-4S)


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.


BLU from Door Harness (+)

WHI/GRN to Transformer (~ AC)

WHI/BLK to Transformer (~ AC)

WHI from Door Harness (-)

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:


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 dispenser to the power source. The indication must be approximately 24 volts dc.


If voltage is present as described, the rectifier is operating properly.

If voltage is not present as described, refer to the dispenser wiring diagram and check the wiring back to the transformer.

43

FIG. 56 RECTIFIER TERMINALS

49179 110613

SERVICE (CONT.)

Relay (all Models)

FIG. 57 RELAY

Location:

The relay (or contactor) is located inside the dispenser chassis on the lower outside of the component bracket.

Test Procedures:


2. With a voltmeter, check the voltage across the white wire and the white/black wire. 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.



If voltage is not present as described, refer to the Wiring Diagram and check the dispenser wiring harness.

If harness has continuity, replace Control Board.

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 continuity 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.


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 then on the chassis using two #8-32 locking screws.

4. Refer to Fig. 58 to reconnect the wires.

Terminal #0

WHI from

Main Harness

Terminal #2

Terminal #4

Terminal #1

BLK from

Main Harness

Terminal #8

BLK from

Main Harness

Terminal #6

WHI/ORN from

Main Harness


44 49179 110613

SERVICE (CONT.)

Resistor (all 230V Models)



2. Disconnect the resistor from the relay and discard.

3. Install new resistor to the relay as shown below.


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.

Test Procedures:


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%.


If resistance is present as described, the resistor is operating properly.

If resistance is not present as described, replace the resistor.

FIG. 60 RESISTOR TERMINALS

P3864

45 49179 110613

SERVICE (CONT.)

Solenoid - Cold Water (JDF-4S only)

FIG. 61 COLD WATER DISPENSE SOLENOID

Location:

The Cold Water dispense solenoid is located at the inside rear of the chassis frame.

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.


If the sound is heard as described and water will not pass through the solenoid valve, there may be a blockage 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.



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. Using the #10-32 screws install new solenoid valve to the chassis frame.

7. Reconnect the water lines to solenoid valve.

8. Refer to schematic wiring diagrams when reconnecting the wires.

Test Procedures:


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: 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.


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.

WHI/VIO to Control Board

5. 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.

46

WHI to Control Board

FIG. 62 COLD WATER SOLENOID

TERMINALS

49179 110613

SERVICE (CONT.)

Solenoid - Inlet (all Models)

P1445.40

FIG. 63 INLET SOLENOID VALVE

Location:

The inlet solenoid is located inside on the rear of the dispenser base.

Test Procedures:


2. Disconnect the two wires from the solenoid valve.

3. Check for continuity across the solenoid valve coil terminals.

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.


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 solenoid 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.

7. Refer to Schematic Wiring Diagrams when reconnecting the wires.

BRN to Control Board WHI to Control Board

120V 1.2 kΩ

230V 3.84 kΩ

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.


If the sound is heard as described and water will not pass through the solenoid valve, there may be a block-

P1217

FIG. 64 INLET SOLENOID VALVE TERMINALS

47 49179 110613

SERVICE (CONT.)

Temperature Probe (all Models)

(Also known as Water Bath Thermistor)

JDF S Bath Thermistor Calibration:

Recalibration of the bath thermistor should be conducted anytime the main circuit board or the bath thermistor is being replaced.

Recalibration procedure:

Step 1: Remove the front splash panel so you can see the LED’s on the main circuit board.

FIG. 65 TEMPERATURE PROBE

Step 2: Place the “Program” switch in the “On” position. (For early models without the program switch, place the dispense on/off switch in the “off” position).

Step 3: Remove the thermistor from the bath tank and place the thermistor in a known 32º F bath or ice water. It is very critical that the water must be 32º F, in order to calibrate the thermistor properly.

Location:

The temperature probe is located on the top of the tank assembly.

Test Procedure:


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.

7. Disconnect the two pin connector from the dispenser main wiring harness.

8. With an ohmmeter, check for continuity across the pins for the black or orange and white wires.

9. See the chart for resistance/voltage readings. Alternate 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 sensor either rapidly rising or falling in temperature.

Step 4: Push and hold the two left dispense switches

(or both switches on a 2S model). After a few seconds, the green water bath, < 34 LED on the board will flash slowly.

Step 5: While still holding the dispense switches, toggle the “Program” switch from the “on” position, to the “off” position, then back to the “on” position. (For early models without the program switch, toggle the dispense on/off switch from “off”, to “on” and then back “off” again).

Step 6: The green water bath, < 34 LED on the board will flash rapidly for a few seconds. When the green water bath, < 34 LED starts flashing slowly again, release the dispense buttons. The calibration is now complete.

Step 7: Place Program switch back in the “off” position for normal operation. (or place the dispense on/ off switch back in the “on” position for normal operation).

48 49179 060914

SERVICE (CONT.)



2. Remove the top rear cover.

3. Disconnect the two pin connector from the dispenser main wiring harness.

4. Remove the temperature probe by firmly pullingup 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.

BLKor ORN pin 1

WHI pin 2

FIG. 66 TEMPERATURE PROBE

TEMP RESISTANCE VOLTAGE

SHORTED 0 Ω 0VDC

31.2k - 34k Ω 3.0VDC

32° F

0.0° C

77° F

25.0° C

9.8k - 10.2k Ω 1.5VDC

OPEN INFINITE 5.0VDC

NOTE: ALL FIGURES LISTED ABOVE ARE APPROXIMATE.

49 49179 051914

SERVICE (CONT.)

Temperature Sensor (all Models)

FIG. 67 TEMPERATURE SENSOR

Location:

The Temperature Sensor is located inside the cabinet between the fan and the water coil.


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 grommet at the top left rear of the cabinet and secure to sensor mounting clip.

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.

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: a) Approx. 1.4 vdc @ 71° F b) Approx. 2.6 vdc @ 32° F

1. RED to GRY J7-1

(Control Board) Positive

2. BLK to WHI/BLK J7-2

(Control Board) Negative

If voltage reading is 0v, the Control Board is not supplying the necessary 5v and should be replaced. If the reading stays at 5vdc, replace sensor.

Alternate Test:

2. Disconnect the plug on sensor leads and check resistance as indicated in chart.

If resistance reading is not within the range listed in chart, replace sensor.

2 1

FIG. 68 TEMPERATURE SENSOR

TEMP RESISTANCE VOLTAGE

SHORTED 0 Ω 0VDC

32° F

0° C

77° F

25.0° C

5645k Ω

2k Ω

2.5VDC

1.1VDC

OPEN INFINITE 5.0VDC

NOTE: ALL FIGURES LISTED ABOVE ARE APPROXIMATE.

50 49179 031416

SERVICE (CONT.)

Transformer (all Models)

C

C

P3864

FIG. 69 TRANSFORMER

Location:

The transformer is located on the electrical component mounting bracket on the lower front of the dispenser behind the splash panel.


1. Loosen the two #8-32 screws securing the component bracket to the dispenser housing base.

2. Pull component bracket out the front of the dispenser far enough so the transformer can be disconnected from the main wiring harness.

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.

Test Procedure:


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.




WHI/BLU to Control

Board J6-1,J12-1

WHI from

Power Cord

BLK from

Power Cord


If voltage is not present as described, refer to the Wiring 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

FIG. 70 TRANSFORMER TERMINALS

P1647

51 49179 110613

SERVICE (CONT.)

Transformer - Lited Doors (JDF-2S, JDF-4S)

C

C

P3864

FIG. 71 TRANSFORMER

Location:

The transformer is located on the electrical component mounting bracket on the lower front of the dispenser behind the splash panel.

Test Procedure:


2. Disconnect the four pin plug from the main harness 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 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.





1. Loosen the two #8-32 screws securing the component bracket to the dispenser housing base.

2. Pull component bracket out the front of the dispenser far enough so the transformer connector can be disconnected from the main wiring harness.

3 Disconnect the transformer four pin connector from the four pin plug on the main wiring harness.

4. 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. 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.

WHI/GRN - T8

WHI/BLK - T12

If voltage is present as described reconnect the plug and the connector and proceed to #5.

If voltage is not present as described, refer to the Wiring Diagrams and check the main wiring harness.

WHI - 120V T2, 240V T6

BLK - TI

FIG. 72 TRANSFORMER TERMINALS

P1647

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.

52 49179 110613

1. Compressor Relay Q25

2. Station 2 Water Q27


4. Station 1 Concentrate Q23





9. Cold Water Valve Q11

10. Inlet Water Valve Q10


Triac Map

2

1 10

9

6 7

8

3

4 5

11

53 49179 012214

ELECTRICAL SCHEMATIC DIAGRAM for JDF-2S

(Models with LED Lited Doors)

SCHEMATIC WIRING DIAGRAM JDF-2S

120V

MODELS

L1 N

220-230V

MODELS

GND L1 N

Models with Dual Dispense Option

BLU

TRANSFORMER

WHI/BLU

O

L

D

A N

E

I

L

BLK

WHI

GRN

A B

A B

EMI

FILTER

A B

A B

BLU

TRANSFORMER

WHI/BLU A

D

L

O

N

E

I

L

BLK

WHI

BLU/BLK

COMPRESSOR ASSY

COMPRESSOR

MOTOR

LIMIT

THERM.

WHI

K1

WHI/BLK

3

6 5

2

N

4

PTC

ASSY 1

WHI

CONDENSOR FAN

BLU/BLK

MOTOR

WHI

BLU/BLK

K1

RED/BLK

RED

LEFT

DISPENSE

PUMP

VIO RED

RIGHT

DISPENSE

PUMP

ORN

WHI RECIR.

PUMP

GRN

WHI/VIO

1

WHI/VIO

RED/BLK

RED/BLK BLK

REFRIGERATION

SWITCH

WHI BLK

WHI/VIO

LEFT

DISPENSE

SOL

YEL YEL

RIGHT

DISPENSE

SOL

WHI/ORN

VIO

WHI/ORN

YEL

VIO

WHI/ORN

YEL

RED

ORN

12

RED

ORN

RED

ORN

VIO

YEL

WHI/ORN

WHI/VIO

J2-1

J2-6

WHI/BLU

BLU

WHI/BLU

BLU

J6-1

J6-3

J12-1

J12-3

C

P

BOARD

BRN

J3-1

J3-2

J7-1

J7-2

J9-1

J9-2

RED

WHI/RED

GRY

WHI/BLK

BLK or ORN

WHI

WATER INLET

VALVE

SOL

WHI

RED

BLK

Models with Membrane Switches

AUXILLARY

CONTROL BOARD

J6-1

J6-5

BLK

RED

BLU

YEL

ORN

J11-1

J11-5 J5-1

J8-1 J8-2

J5-4

WHI

FAN

1 t

WATER BATH

THERMISTOR

Models with Mechanical Switches t

CABINET

THERMISTOR

BLK

RIGHT

DISPENSE

SWITCH

RED

1

GRN or YEL

RED

BLK

BLK

BLK

LEFT

DISPENSE

SWITCH

GRN

STATIC

SHIELD

STATIC

SHIELD

BLK

DISPENSE

STATION

#1

PUSH BUTTON OPTION

DISPENSE

STATION

#2

ORN

ORN

BRN YEL

BLK

BRN

STATIC

SHIELD

STATIC

SHIELD

BLK

PROGRAM

SWITCH

DISPENSE

STATION

#1

DISPENSE

STATION

#2

DISPENSE

LOCKOUT

SWITCH

EARLY MODELS

DISPENSE

LOCKOUT

SWITCH

Chassis

Ground

Chassis

Ground

WHI

BRN

GRN

Models with Lited Doors

+

_

BLK

RED

WHI

BRN

GRN

Door

Ground

RED

BLK

J2-1

Regulator

Board

J3-1

RED

BLK

J1-1

J6-1

J6-5

BLK

RED

YEL

BLU

ORN

J11-1

J11-5

RED

BLK

+

_

120 VOLTS AC or

220-230 VOLTS AC

2 WIRE

SINGLE PHASE

BLU

BLU

BRN

DISPENSE

LOCKOUT

SWITCH

LATE MODELS

54 49179 031416


(Models with Flourescent Lited Doors)

WHI

GRN

BRN

BRN

WHI

WHI

WHI

RED

BLK

WHI

WHI

RED

BLK

WHI

BLK

DISPENSE LOCKOUT SWITC

WHI

BLK

GRN

BLU or BRN

WHI/BLK

WHI/GRN

GRN

WHI

BLU or BRN RED

WHI

GRN

BLU

BLU

BLK

BLK

BLU

BRN

GRN/YEL

L I N E

L O A D

BRN/WHI

WHI/GRN

BLK

WHI

L I N E

L O A D

T STAR

RUN

GRN/YEL-16

TER INLET VA

BLK

BLK

1

WHI

BLK

BLK WH

WHI/BLK

BRN

BLK

WHI

J1-5

J1-1

C O N T R O L P C B O A R D

DISPENSE SWITC DISPENSE SWITC

GRN or YEL RE BLK BLK

BLK RE

RECIR. PUMP

J2-5

J3-1

J2-1

J5-1

J1-3

J1-1

J4-5

J5-5

J3-5

J4-1

SMALL

MEDIUM

LARGE

STOP/PLUS

MEDIUM

LARGE

SMALL

STOP/PLUS

DISPENSE

DISPENSE

LOCKOUT SWITCH

55 49179 110613

SCHEMATIC WIRING DIAGRAM JDF-2S PUSH/HOLD

(OVAL SWITCH MEMBRANE)

120V

MODELS

L1 N

220-230V

MODELS

GND L1 N

Models with Dual Dispense Option

BLU

TRANSFORMER

WHI/BLU A

D

L

O

N

E

I

L

BLK

WHI

GRN

A B

A B

EMI

FILTER

A B

A B

BLU

TRANSFORMER

WHI/BLU A

D

L

O

N

E

I

L

BLK

WHI

COMPRESSOR ASSY

C

A P

Protector

RELAY

1

BRN/WHT

2

BLK

BRN

BLUE

Start Capacitor

WHT

CONDENSOR FAN

BLU/BLK

MOTOR

WHI

BLU/BLK

K1

RED/BLK

RED

LEFT

DISPENSE

PUMP

VIO RED

RIGHT

DISPENSE

PUMP

ORN

WHI RECIR.

PUMP

GRN

WHI/VIO

1

WHI/VIO

RED/BLK

WHI

K1

WHI/BLK

RED/BLK BLK

REFRIGERATION

SWITCH

WHI BLK

J3-1

J3-2

COLD WATER

VALVE

WHI/VIO

SOL

BRN

RED

WHI/RED

WHI

WATER INLET

VALVE

SOL

WHI

RED

BLK

WHI/VIO

LEFT

DISPENSE

SOL

YEL YEL

RIGHT

DISPENSE

SOL

WHI/ORN

VIO

WHI/ORN

YEL

VIO

WHI/ORN

YEL

RED

ORN

12

RED

ORN

RED

ORN

VIO

YEL

WHI/ORN

WHI/VIO

J2-1

J2-6

J7-1

J7-2

J9-1

J9-2

GRY

WHI/BLK

BLK or ORN

WHI

WHI

FAN

1 t

WATER BATH

THERMISTOR t

CABINET

THERMISTOR

Models with P/H Membrane Switches

J13-1

Models with Lit Doors

AUXILLARY

CONTROL BOARD

Push & Hold

Connector J13-6

STATIC

SHIELD

STATIC

SHIELD

DISPENSE

STATION

#1

DISPENSE

STATION

#2

WHI/BLU

BLU

WHI/BLU

BLU

J6-1

J6-3

J12-1

J12-3

J11-1

J11-5 J8-1

J15-1

YEL

ORN

BLU

J15-4

J5-1

J5-4

GRY

RED

BLK

BLK

Regulator

Board

J2-1 J3-1

J1-1

+ + -

RED

BLK

120 VOLTS AC or

220-230 VOLTS AC

2 WIRE

SINGLE PHASE

44745.0002 A 11/18 © 2011 BUNN-O-MATIC CORPORATION

1

BLK

BRN

DISPENSE

LOCKOUT

SWITCH

BLK

Chassis

Ground

PROGRAM

SWITCH

Chassis

Ground

WHI

BRN

GRN

WHI

BRN

GRN

Door

Ground

56 49179 011619

SCHEMATIC WIRING DIAGRAM JDF-2S PORTION CONTROL

(OVAL SWITCH MEMBRANE) GRN

120V

MODELS

L1 N

220-230V

MODELS

GND L1 N

BLU

TRANSFORMER

WHI/BLU A

D

L

O

N

E

I

L

BLK

WHI

A B

A B

COMPRESSOR ASSY

C

A P

Protector

RELAY

1

BRN/WHT

2

BLK

BRN BLUE

Start Capacitor

WHT

WHI

K1

RED

BLU/BLK

STATION 1

DISPENSE

PUMP

VIO

K1

RED/BLK

RED

STATION 2

DISPENSE

PUMP

BLU/BLK

MOTOR

WHI

CONDENSOR FAN

WHI RECIR.

PUMP

GRN

RED/BLK

RED/BLK BLK

REFRIGERATION

SWITCH

ORN

WHI/BLK

WHI BLK

WHI/VIO

1

WHI/VIO

WHI/VIO

STATION 1

DISPENSE

SOL

YEL YEL

STATION 2

DISPENSE

SOL

WHI/ORN

VIO

WHI/ORN

YEL

RED

ORN

12

VIO

WHI/ORN

YEL

RED

ORN

RED

ORN

VIO

YEL

WHI/ORN

WHI/VIO

J2-1

J2-6

BLU

TRANSFORMER

WHI/BLU A

D

L

O

N

E

I

L BLK

WHI

COLD WATER

WHI/VIO

BRN

J3-1

J3-2

J7-1

J7-2

J9-1

J9-2

VALVE

SOL

WATER INLET

VALVE

SOL

RED

WHI/RED

GRY

WHI/BLK

WHI

WHI

BLK or ORN

WHI t

WATER BATH

THERMISTOR

1

RED

BLK FAN t

CABINET

THERMISTOR

EMI

FILTER

A B

A B

120 VOLTS AC or

220-230 VOLTS AC

2 WIRE

SINGLE PHASE



J13-1

J13-6

WHI/BLU

BLU

WHI/BLU

BLU

J6-1

J6-3

J12-1

J12-3

BLK

RED

YEL

BLU

ORN

J11-1

J11-5

BRN

J8-1 J8-2

WHI

J15-1

J15-4

J5-1

J5-4

BLK

BLK

BRN

BLU

1

DISPENSE

LOCKOUT

SWITCH

Portion Control

Connector

Models with P/C Membrane Switches

AUXILLARY

CONTROL BOARD

Chassis

Ground

WHI

BRN

GRN

BLK

Chassis

Ground

PROGRAM

SWITCH

WHI

BRN

GRN

Door

Ground

STATIC

SHIELD

DISPENSE

STATION

#1

STATIC

SHIELD

DISPENSE

STATION

#2

Regulator

Board

J2-1 J3-1

J1-1

+ + -

RED

BLK

57 49179 011619


(Models with LED Lited Doors)

SCHEMATIC WIRING DIAGRAM JDF-4S

GRN

120V

MODELS

L1 N

220-230V

MODELS

GND L1 N

VIO

WHI/ORN

YEL

VIO

WHI/ORN

YEL

RED

ORN

12

RED

ORN

BLU

TRANSFORMER

WHI/BLU A

D

O

L

N

E

L

I

BLK

WHI

BLU

TRANSFORMER

WHI/BLU A

D

O

L

N

E

L

I

BLK

WHI

COMPRESSOR ASSY

BLU/BLK

LIMIT

THERM.

3

6

4

5

2

N

1

BLU/BLK

RED

STATION 1

DISPENSE

PUMP

VIO

K1

RED/BLK

RED

STATION 2

DISPENSE

PUMP

BLU/BLK

MOTOR

WHI

CONDENSOR FAN

ORN

WHI RECIR.

PUMP

RED/BLK

GRN

REFRIGERATION

SWITCH

RED/BLK BLK

WHI BLK

WHI/VIO

1

WHI/VIO

WHI/VIO

STATION 1

DISPENSE

SOL

YEL YEL

STATION 2

DISPENSE

SOL

WHI/ORN

WHI

K1

WHI/BLK

WHI/VIO

COLD WATER

VALVE

SOL

WHI

RED

ORN

VIO

YEL

WHI/ORN

WHI/VIO

J2-1

J2-6

BRN

WATER INLET

VALVE

SOL

J3-1

J3-2

J7-1

J7-2

J9-1

J9-2

RED

WHI/RED

GRY

WHI/BLK

BLK or ORN

WHI

WHI t

WATER BATH

THERMISTOR

RED

STATION 3

DISPENSE

PUMP

VIO RED

STATION 4

DISPENSE

PUMP

ORN

WHI/VIO

1

TAN

1

A B

A B

RED

BLK FAN t

CABINET

THERMISTOR

Models with Mechanical Switches

EMI

FILTER

A B

A B

WHI/VIO

STATION 3

DISPENSE

SOL

YEL


YEL

STATION 4

DISPENSE

SOL

WHI/ORN

AUXILLARY

CONTROL BOARD

VIO

WHI/ORN

YEL

PNK

BLU

GRY

RED

ORN

12

WHI/GRN

GRN

J6-1

J6-5

BLK

RED

BLU

YEL

ORN

WHI/GRN

GRN

PNK

GRY

BLU

TAN

J13-1

J13-6

WHI/BLU

BLU

WHI/BLU

BLU

BLK

RED

BLU

YEL

ORN

J6-1

J6-3

J12-1

J12-3

J11-1

J11-5 J8-1 J8-2

J15-1

YEL

ORN

BLU

J15-4

J5-1

J5-4

GRN or GRY

RED

BLK

BLK

8

1

BLU

COLD WATER

DISPENSE

SWITCH

BLK

BLK

STATION 4

DISPENSE

SWITCH

ORN

BLK

STATION 3

DISPENSE

SWITCH

YEL

BLK

STATION 2

DISPENSE

SWITCH

RED

BLK

STATION 1

DISPENSE

SWITCH

GRN

STATIC

SHIELD

STATIC

SHIELD

STATIC

SHIELD

STATIC

SHIELD

STATIC

SHIELD

YEL

BLK

DISPENSE

STATION

#1

PUSH BUTTON OPTION

DISPENSE

STATION

#2

DISPENSE

STATION

#3

COLD

WATER

SWITCH

DISPENSE

STATION

#4

DISPENSE

STATION

#1

STATIC

SHIELD

DISPENSE

STATION

#2

STATIC

SHIELD

DISPENSE

STATION

#3

STATIC

SHIELD

STATIC

SHIELD

COLD

WATER

SWITCH

DISPENSE

STATION

#4

STATIC

SHIELD

ORN

BRN

DISPENSE

LOCKOUT

SWITCH

EARLY MODELS

BLK

BRN

DISPENSE

LOCKOUT

SWITCH

BLK

Chassis

Ground

PROGRAM

SWITCH

Chassis

Ground

WHI

BRN

GRN

Models with Lited Doors

WHI

BRN

GRN

Door

Ground

+

_

BLK

RED

+

_

RED

BLK

Regulator

Board

J2-1 J3-1

RED

BLK

J1-1

RED

BLK

_

+

RED

BLK

_

+

J6-1

J6-5

BLK

RED

YEL

BLU

ORN

J11-1

J11-5

120 VOLTS AC or

220-230 VOLTS AC

2 WIRE

SINGLE PHASE

BLU

BRN

DISPENSE

LOCKOUT

SWITCH

LATE MODELS

58 49179 031416


(Models with Flourescent Lited Doors)

WHI

GRN

BRN

BRN

WHI

WHI

WHI

RED

BLK

WHI

WHI

RED

BLK

WHI

BLK

DISPENSE LOCKOU

WHI

BLK

GRN

VIO or BRN

WHI/BLK

WHI/GRN

GRN

WHI

VIO or BRN

WHI

GRN

RED

BLU

BLU

BLK

BLK

BLU

BRN

GRN/YEL

BLK

WHI

BLK

WHI

L I N E

L O A D

L I N E

L O A D

T STAR

RUN

GRN/YEL-16

1

TER INLET VA

BLK

WHI

BRN

WHI/BLK

WHI/VIO

J1-1

J1-5

WHI

BLK

BLK

BLK

C O N T R O L P C B O A R D

RECIR. PUMP

K BL

J2-5

J3-1

J2-1

J3-5

J4-1

J5-1

J1-3

J1-1

J4-5

J5-5

DISPENSE

MEDIUM

LARGE

SMALL

STOP/PLUS

DISPENSE ST

COLD WA

SMALL

MEDIUM

LARGE

STOP/PLUS

MEDIUM

LARGE

SMALL

STOP/PLUS

MEDIUM

LARGE

SMALL

STOP/PLUS

DISPENSE ST

DISPENSE ST

DISPENSE ST

DISPENSE

DISPENSE

DISPENSE

DISPENSE

DISPENSE

DISPENSE ST

COLD WA

DISPENSE ST

DISPENSE ST

DISPENSE ST

59 49179 110613

SCHEMATIC WIRING DIAGRAM JDF-4S PUSH/HOLD


120V

MODELS

L1 N

220-230V

MODELS

GND L1 N

BLU/BLK

2

3

1

OVERLOAD

PROTECTOR

COMPRESSOR ASSY

C

COMPRESSOR

MOTOR

S

4

3 1

2

M

WHT

WHI

RED

BLU/BLK

STATION 1

DISPENSE

PUMP

VIO

K1

START RELAY

RED/BLK

RED

STATION 2

DISPENSE

PUMP

BLU/BLK

MOTOR

WHI

CONDENSOR FAN

WHI RECIR.

PUMP

GRN

RED/BLK

RED/BLK BLK

REFRIGERATION

SWITCH

ORN

WHI/VIO

1

WHI/VIO

WHI BLK

BLU

TRANSFORMER

WHI/BLU A

D

L

O

N

E

I

L

BLK

WHI

BLU

TRANSFORMER

WHI/BLU A

D

L

O

N

E

I

L BLK

WHI

K1

WHI/BLK

WHI/VIO

STATION 1

DISPENSE

SOL

YEL YEL

STATION 2

DISPENSE

SOL

WHI/ORN

VIO

WHI/ORN

YEL

RED

ORN

12

VIO

WHI/ORN

YEL

RED

ORN

RED

ORN

VIO

YEL

WHI/ORN

WHI/VIO

J2-1

J2-6

J3-1

J3-2

J7-1

J7-2

J9-1

J9-2

RED

WHI/RED

GRY

WHI/BLK

BLK or ORN

WHI t

WATER BATH

THERMISTOR

RED

STATION 3

DISPENSE

PUMP

VIO RED

STATION 4

DISPENSE

PUMP

ORN

COLD WATER

VALVE

WHI/VIO

SOL

WHI

BRN

WATER INLET

VALVE

SOL

WHI

WHI/VIO

1

TAN

1

RED

BLK

A B

A B

FAN t

CABINET

THERMISTOR

EMI

FILTER

A B

A B


AUXILLARY

CONTROL BOARD


+ -

RED

BLK

WHI/VIO

STATION 3

DISPENSE

SOL

YEL YEL

STATION 4

DISPENSE

SOL

WHI/ORN

VIO

WHI/ORN

YEL

PNK

BLU

GRY

RED

ORN

12

WHI/GRN

GRN

WHI/GRN

GRN

PNK

GRY

BLU

TAN

J13-1

J13-6

STATIC

SHIELD

DISPENSE

STATION

#1

STATIC

SHIELD

DISPENSE

STATION

#2

Push & Hold

Connector

STATIC

SHIELD

DISPENSE

STATION

#3

STATIC

SHIELD

COLD

WATER

SWITCH

STATIC

SHIELD

WHI/BLU

BLU

WHI/BLU

BLU

J6-1

J6-3

J12-1

J12-3

J11-1

J15-1

J15-4

J5-1

J5-4

YEL

ORN

BLU

GRY

RED

BLK

BLK

DISPENSE

STATION

#4

+ + -

Regulator

Board

J2-1 J3-1

J1-1

J11-5 J8-1

WHI

BRN

1

+ -

RED

BLK

BLK

BRN

DISPENSE

LOCKOUT

SWITCH

BLK

Chassis

Ground

PROGRAM

SWITCH

Chassis

Ground

WHI

BRN

GRN

WHI

BRN

GRN

Door

Ground

120 VOLTS AC or

220-230 VOLTS AC

2 WIRE

SINGLE PHASE


60 49179 011619

SCHEMATIC WIRING DIAGRAM JDF-4S PORTION CONTROL


120V

MODELS

L1 N

220-230V

MODELS

GND L1 N

BLU/BLK

2

3

1

OVERLOAD

PROTECTOR

COMPRESSOR ASSY

C

COMPRESSOR

MOTOR

S

4

3 1

2

M

WHT

WHI

RED

BLU/BLK

STATION 1

DISPENSE

PUMP

VIO

K1

START RELAY

RED/BLK

RED

STATION 2

DISPENSE

PUMP

BLU/BLK

MOTOR

WHI

CONDENSOR FAN

WHI RECIR.

PUMP

GRN

RED/BLK

RED/BLK BLK

REFRIGERATION

SWITCH

ORN

WHI/VIO

1

WHI/VIO

WHI BLK

BLU

TRANSFORMER

WHI/BLU A

D

L

O

N

E

I

L

BLK

WHI

BLU

TRANSFORMER

WHI/BLU A

D

L

O

N

E

I

L BLK

WHI

K1

WHI/BLK

WHI/VIO

STATION 1

DISPENSE

SOL

YEL YEL

STATION 2

DISPENSE

SOL

WHI/ORN

VIO

WHI/ORN

YEL

RED

ORN

12

VIO

WHI/ORN

YEL

RED

ORN

RED

ORN

VIO

YEL

WHI/ORN

WHI/VIO

J2-1

J2-6

J3-1

J3-2

J7-1

J7-2

J9-1

J9-2

RED

WHI/RED

GRY

WHI/BLK

BLK or ORN

WHI t

WATER BATH

THERMISTOR

RED

STATION 3

DISPENSE

PUMP

VIO RED

STATION 4

DISPENSE

PUMP

ORN

COLD WATER

VALVE

WHI/VIO

SOL

WHI

BRN

WATER INLET

VALVE

SOL

WHI

WHI/VIO

1

TAN

1

RED

BLK

A B

A B

FAN t

CABINET

THERMISTOR

EMI

FILTER

A B

A B

WHI/VIO

STATION 3

DISPENSE

SOL

YEL YEL

STATION 4

DISPENSE

SOL

WHI/ORN

VIO

WHI/ORN

YEL

PNK

BLU

GRY

RED

ORN

12

WHI/GRN

GRN

WHI/GRN

GRN

PNK

GRY

BLU

TAN

J13-1

J13-6

WHI/BLU

BLU

WHI/BLU

BLU

BLK

RED

YEL

BLU

ORN

J11-5

J6-1

J6-3

J12-1

J12-3

J11-1

J15-1

J15-4

J5-1

BRN

J8-1 J8-2

WHI

J5-4

BLK

BLK

BRN

BLU

1

DISPENSE

LOCKOUT

SWITCH

Chassis

Ground

BLK

WHI

BRN

GRN

Chassis

Ground

PROGRAM

SWITCH


WHI

BRN

GRN

Door

Ground

+ -

RED

BLK

Portion Control

Connector

Models with P/C Membrane Switches

AUXILLARY

CONTROL BOARD

+ + -

Regulator

Board

J2-1 J3-1

J1-1

+ -

RED

BLK

120 VOLTS AC or

220-230 VOLTS AC

2 WIRE

SINGLE PHASE


STATIC

SHIELD

DISPENSE

STATION

#1

STATIC

SHIELD

DISPENSE

STATION

#2

STATIC

SHIELD

DISPENSE

STATION

#3

STATIC

SHIELD

STATIC

SHIELD

COLD

WATER

SWITCH

DISPENSE

STATION

#4

61 49179 011619

ELECTRICAL SCHEMATIC DIAGRAM for JDF-4D

(Press & Release Models)

SCHEMATIC WIRING DIAGRAM JDF-4D

GRN

120V

MODELS

L1 N

230V

MODELS

GND L1 N

BLU/BLK

COMPRESSOR ASSY

COMPRESSOR

MOTOR

LIMIT

THERM.

WHI/GRN

BLU

TAN

WHI/ORN

WHI/VIO

STATION 1

DISPENSE

3

6

4

5

2

N

1

WHI

CONDENSOR FAN

BLU/BLK

MOTOR

WHI

BLU/BLK

K1

RED/BLK

PUMP

WHI RECIR.

PUMP

RED/BLK

GRN

WHI

K1

WHI/BLK

REFRIGERATION

SWITCH

RED/BLK BLK

WHI BLK

STATION 2

DISPENSE PUMP

STATION 3

DISPENSE PUMP

VIO

ORN

RED

PNK

ORN

WHI/GRN

1

6

VIO

ORN

RED

PNK

ORN

WHI/GRN

J2-1

J2-6

STATION 4

DISPENSE PUMP

STATION 1

DISPENSE

STATION 2

DISPENSE

SOL

SOL

J13-1

O

A

C

B

R

D

L

P

R

O

N

T

C

O

STATION 3

DISPENSE

STATION 4

DISPENSE

SOL

SOL

WHI/VIO

WHI/ORN

YEL

TAN

BLU

GRY

1

WHI/VIO

WHI/ORN

YEL

TAN

BLU

GRY

6

J13-6


J10-1

J10-7

AUXILLARY

CONTROL BOARD

J6-1

J6-5

J8-1

BLK

RED

BLU

YEL

ORN

WHI/BLU

BLU

WHI/BLU

BLU

J6-1

J6-3

J12-1

J12-3

BLK

RED

BLU

YEL

ORN

J11-1

J11-5

BLU

TRANSFORMER

O

L L

I

WHI/BLU

BLK

WHI

BLU

TRANSFORMER

O

L L

I

WHI/BLU

BLK

WHI

COLD WATER

WHI/VIO

VALVE

SOL

WHI

A B

A B

BRN

WATER INLET

VALVE

SOL

WHI

J3-1

J3-2

RED

WHI/RED

J7-1

J7-2

J9-1

J9-2

GRY

WHI/BLK

BLK

WHI

1

J8-1 t

WATER BATH

THERMISTOR

WHI-22

BLK-22 t

CABINET

THERMISTOR

RED

BLK

RED

BLK

FAN

FAN

J15-1

J15-4

J5-1

J5-4

BLK

BLK

EMI

FILTER

A B

A B

1 22

J8-6

J9-1

J9-4

RINSE

SWITCH

DISPENSE

LOCKOUT

SWITCH

BLK

BLK

DISPENSE

SWITCH

#1

DISPENSE

NOZZLE

#1

DISPENSE

SWITCH

#2

DISPENSE

NOZZLE

#2

DISPENSE

SWITCH

#3

POWER

LED

DISPENSE

SWITCH

#4

DISPENSE

NOZZLE

#3

COOLING

LED

STATIC

SHIELD

DISPENSE

NOZZLE

#4

WHI/VIO

WHI/ORN

TAN

120 VOLTS AC or

230 VOLTS AC

2 WIRE

SINGLE PHASE 41649.0000B 03/09 © 2009 BUNN-O-MATIC CORPORATION

BLU

WHI/GRN

62 49179 110613

ELECTRICAL SCHEMATIC DIAGRAM for JDF-4D

(Portion Control Models)

SCHEMATIC WIRING DIAGRAM JDF-4D

GRN

120V

MODELS

L1 N

220-230V

MODELS

GND L1 N

BLU

TRANSFORMER

WHI/BLU A

D

L

O

N

E

I

L

BLK

WHI

BLU

TRANSFORMER

WHI/BLU A

D

L

O

N

E

I

L BLK

WHI

A B

A B

EMI

FILTER

A B

A B

BLU/BLK

COMPRESSOR ASSY

STATION 1

DISPENSE

3

6

4

5

2

N

PTC

ASSY 1

WHI

CONDENSOR FAN

BLU/BLK

MOTOR

WHI

BLU/BLK

K1

RED/BLK

PUMP

WHI RECIR.

PUMP

RED/BLK

GRN

WHI

K1

WHI/BLK

REFRIGERATION

SWITCH

RED/BLK BLK

WHI BLK

STATION 2

DISPENSE PUMP

STATION 3

DISPENSE PUMP

STATION 4

DISPENSE PUMP

VIO

ORN

RED

PNK

ORN

WHI/GRN

1

6

VIO

ORN

RED

PNK

ORN

WHI/GRN

J2-1

J2-6

STATION 1

DISPENSE

SOL

STATION 2

DISPENSE

SOL

STATION 3

DISPENSE

SOL

STATION 4

DISPENSE

SOL

WHI/VIO

WHI/ORN

YEL

TAN

BLU

GRY

1

6

WHI/VIO

WHI/ORN

YEL

TAN

BLU

GRY

J13-1

J13-6

COLD WATER

VALVE

WHI/VIO

SOL

WHI

C

P

BOARD

BRN

WATER INLET

VALVE

SOL

WHI

J3-1

J3-2

RED

WHI/RED

J7-1

J7-2

J9-1

J9-2

GRY

WHI/BLK

BLK

WHI

J8-1

1 t

WATER BATH

THERMISTOR

WHI-22

BLK-22

1

CLOCK t

CABINET

THERMISTOR

RED

BLK

RED

BLK

FAN

FAN

WHI/GRN

BLU

TAN

WHI/ORN

WHI/VIO


J10-1

POWER LED

J10-7

COOLING LED

J8-1

J8-6

J6-1

J6-5

BLK

RED

BLU

YEL

ORN

WHI/BLU

BLU

WHI/BLU

BLU

J6-1

J6-3

J12-1

J12-3

BLK

RED

BLU

YEL

ORN

J11-1

J11-5

J15-1

J15-4

J5-1

J5-4

BLK

BLK

AUXILLARY

CONTROL BOARD

J9-1

J9-4

RINSE

SWITCH

BLK

BLK DISPENSE

LOCKOUT

SWITCH

STATIC

SHIELD

STATIC

SHIELD

STATIC

SHIELD

STATIC

SHIELD

STATIC

SHIELD

DISPENSE

STATION

#1

DISPENSE

NOZZLE

#1

DISPENSE

STATION

#2

DISPENSE

NOZZLE

#2

DISPENSE

STATION

#3

DISPENSE

NOZZLE

#3

COLD

WATER

SWITCH

DISPENSE

STATION

#4

DISPENSE

NOZZLE

#4

WHI/VIO

WHI/ORN

TAN

120 VOLTS AC or

220-230 VOLTS AC

2 WIRE

SINGLE PHASE 41649.0001A 02/13 © 2013 BUNN-O-MATIC CORPORATION

BLU

WHI/GRN

63 49179 110613

ELECTRICAL SCHEMATIC DIAGRAM for JDF-4S-SB

SCHEMATIC WIRING DIAGRAM JDF-4S-SB

GRN

120V

MODELS

L1 N

230V

MODELS

GND L1 N

BLU

TRANSFORMER

L

O I

L

WHI/BLU

BLK

WHI

BLU

TRANSFORMER

WHI/BLU

A

D

L

O

N

E

I

L BLK

WHI

BLU/BLK

COMPRESSOR ASSY

COMPRESSOR

MOTOR

LIMIT

THERM.

WHI

K1

WHI/BLK

COLD WATER

VALVE

WHI/VIO

SOL

WHI

3

6

4

5

2

N

1

BLU/BLK

K1

RED/BLK

RED

STATION 1

DISPENSE

PUMP

VIO RED

STATION 2

DISPENSE

PUMP

ORN

CONDENSOR FAN

BLU/BLK

MOTOR

WHI

WHI

RECIR.

PUMP

GRN

WHI/VIO

1

WHI/VIO

RED/BLK

RED/BLK BLK

REFRIGERATION

SWITCH

WHI BLK

WHI/VIO

STATION 1

DISPENSE

SOL

YEL YEL

STATION 2

DISPENSE

SOL

WHI/ORN

VIO

WHI/ORN

YEL

RED

ORN

12

VIO

WHI/ORN

YEL

RED

ORN

RED

ORN

VIO

YEL

WHI/ORN

WHI/VIO

J2-1

J2-6

RED

STATION 3

DISPENSE

PUMP

VIO RED

STATION 4

DISPENSE

PUMP

ORN

WHI/VIO

1

TAN

WHI/VIO

STATION 3

DISPENSE

SOL

YEL YEL

STATION 4

DISPENSE

SOL

WHI/ORN

VIO

WHI/ORN

YEL

PNK

BLU

GRY

RED

ORN

12

WHI/GRN

GRN

WHI/GRN

GRN

PNK

GRY

BLU

TAN

J13-1

J13-6

WHI/BLU

BLU

WHI/BLU

BLU

J6-1

J6-3

J12-1

J12-3

J11-1

120 VOLTS AC or

230 VOLTS AC

2 WIRE

SINGLE PHASE 44746.0001A 06/11 © 2011 BUNN-O-MATIC CORPORATION

J11-5

BRN

WATER INLET

VALVE

SOL

WHI

J3-1

J3-2

J7-1

J7-2

J9-1

J9-2

RED

WHI/RED

GRY

WHI/BLK

BLK or ORN

WHI

J15-1

YEL

ORN

BLU

J15-4

J5-1

J5-4

GRN

RED

BLK

BLK

DISPENSE

LOCKOUT

SWITCH t

WATER BATH

THERMISTOR

BLK

1

BLK

BLK

MAIN POWER

ON/OFF

SWITCH

BLK

WHI WHI

RED

BLK FAN t

CABINET

THERMISTOR

8

1

ORN

YEL

RED

GRN

BLK

BLK

BLK

BLK

BLK

BLK

BLK

BLK

BLK

BLK

BLK

BLK

A B

A B

RED

BLK

1

BLK

6

GRN

BLK

1

BLK

6

ORN

BLK

1

BLK

6

YEL

BLK

1

BLK

6

EMI

FILTER

A B

A B

STATIC

SHIELD

DISPENSE

DISPENSE

STATION

#4

STATIC

SHIELD

DISPENSE

DISPENSE

STATION

#3

STATIC

SHIELD

DISPENSE

DISPENSE

STATION

#2

STATIC

SHIELD

DISPENSE

DISPENSE

STATION

#1

64 49179 110613

SCHEMATIC WIRING DIAGRAM JDF-4S-SB PUSH/HOLD

(OVAL SWITCH MEMBRANE)

GRN

120V

MODELS

L1 N

220-230V

MODELS

GND L1 N

A B

A B

EMI

FILTER

BLK

WHI

A B

A B

MAIN ON/OFF SWITCH

BLU/BLK

2

3

1

OVERLOAD

PROTECTOR

COMPRESSOR ASSY

COMPRESSOR

MOTOR

S

4

3

C

1

2

M

WHT

START RELAY

BLU/BLK

MOTOR

WHI

CONDENSOR FAN

BLU/BLK

K1

RED/BLK

RED

STATION 1

DISPENSE

PUMP

VIO RED

STATION 2

DISPENSE

PUMP

ORN

WHI RECIR.

PUMP

GRN

RED/BLK

WHI/VIO

1

WHI

1

WHI/VIO

WHI/VIO

STATION 1

DISPENSE

SOL

YEL

RED

STATION 3

DISPENSE

PUMP

VIO

YEL

STATION 2

DISPENSE

SOL

WHI/ORN

RED

STATION 4

DISPENSE

PUMP

ORN

VIO

WHI/ORN

YEL

RED

ORN

12

WHI

WHI

WHI

WHI

WHI

VIO

WHI/ORN

YEL

12

RED

ORN

WHI/VIO

1

WHI

1

TAN

WHI/VIO

STATION 3

DISPENSE

SOL

YEL YEL

STATION 4

DISPENSE

SOL

WHI/ORN

VIO

WHI/ORN

YEL

RED

ORN

12

WHI

WHI

WHI

WHI

WHI

PNK

BLU

GRY

12

WHI/GRN

GRN

BLU

TRANSFORMER

WHI/BLU A

D

L

O

N

E

L

I

BLK

WHI

BLU

TRANSFORMER

WHI/BLU A

D

L

O

N

E

L

I

BLK

WHI

WHI

K1

WHI/BLK

WHI/VIO

COLD WATER

VALVE

SOL

WHI

RED/BLK BLK

REFRIGERATION

SWITCH

RED

ORN

VIO

YEL

WHI/ORN

WHI/VIO

J2-1

J2-6

WHI/GRN

GRN

PNK

GRY

BLU

TAN

J13-1

J13-6

WHI BLK

WHI/BLU

BLU

WHI/BLU

BLU

J6-1

J6-3

J12-1

J12-3

J11-1

J11-5 J8-1

WHI

BRN

J15-1

YEL

ORN

BLU

J15-4

J5-1

J5-4

GRY

RED

BLK

BLK

BRN

WATER INLET

VALVE

SOL

WHI

J3-1

J3-2

J7-1

J7-2

J9-1

J9-2

RED

WHI/RED

GRY

WHI/BLK

BLK or ORN

WHI

1

RED

BLK FAN t

WATER BATH

THERMISTOR t

CABINET

THERMISTOR


AUXILLARY

CONTROL BOARD

Push & Hold

Connector

STATIC

SHIELD

DISPENSE

STATION

#1

STATIC

SHIELD

DISPENSE

STATION

#2

STATIC

SHIELD

DISPENSE

STATION

#3

STATIC

SHIELD

STATIC

SHIELD

COLD

WATER

SWITCH

DISPENSE

STATION

#4

1

120 VOLTS AC or

220-230 VOLTS AC

2 WIRE

SINGLE PHASE


BLK

BRN

DISPENSE

LOCKOUT

SWITCH

BLK

Chassis

Ground

PROGRAM

SWITCH

Chassis

Ground

WHI

BRN

GRN

Door

Ground

65 49179 011619

BUNN JDF-2S 120V Lit Two Segment Graphic Door PH Service Manual

Silver Series

JDF-2S & JDF-4S PH or PC with Non LIT or LIT Graphic Door

JDF-2S & JDF-4S PH or PC with LIT Segment Door

SERVICE & REPAIR MANUAL

Bunn-O-Matic Corporation

INTRODUCTION

CONTENTS

USER NOTICES

SITE PREPARATION

Recommended Daily Cleaning Instructions

REQUIRED REGULAR MAINTENANCE:

TROUBLESHOOTING

TROUBLESHOOTING (Continued)

TROUBLESHOOTING (Continued)

TROUBLESHOOTING (Continued)

TROUBLESHOOTING (Continued)

TROUBLESHOOTING (Continued)

SERVICE

Triac Map

ELECTRICAL SCHEMATIC DIAGRAM for JDF-2S

(Models with LED Lited Doors)

ELECTRICAL SCHEMATIC DIAGRAM for JDF-2S

(Models with Flourescent Lited Doors)

ELECTRICAL SCHEMATIC DIAGRAM for JDF-4S

(Models with LED Lited Doors)

ELECTRICAL SCHEMATIC DIAGRAM for JDF-4S

(Models with Flourescent Lited Doors)

ELECTRICAL SCHEMATIC DIAGRAM for JDF-4D

(Press & Release Models)

ELECTRICAL SCHEMATIC DIAGRAM for JDF-4D

(Portion Control Models)

ELECTRICAL SCHEMATIC DIAGRAM for JDF-4S-SB

Related manuals

Table of contents

BUNN JDF-2S 120V Lit Two Segment Graphic Door PH Service Manual

Silver Series

JDF-2S & JDF-4S PH or PC with Non LIT or LIT Graphic Door

JDF-2S & JDF-4S PH or PC with LIT Segment Door

SERVICE & REPAIR MANUAL

Bunn-O-Matic Corporation

INTRODUCTION

CONTENTS

USER NOTICES

SITE PREPARATION

Recommended Daily Cleaning Instructions

REQUIRED REGULAR MAINTENANCE:

TROUBLESHOOTING

TROUBLESHOOTING (Continued)

TROUBLESHOOTING (Continued)

TROUBLESHOOTING (Continued)

TROUBLESHOOTING (Continued)

TROUBLESHOOTING (Continued)

SERVICE

Triac Map

ELECTRICAL SCHEMATIC DIAGRAM for JDF-2S

(Models with LED Lited Doors)

ELECTRICAL SCHEMATIC DIAGRAM for JDF-2S

(Models with Flourescent Lited Doors)

ELECTRICAL SCHEMATIC DIAGRAM for JDF-4S

(Models with LED Lited Doors)

ELECTRICAL SCHEMATIC DIAGRAM for JDF-4S

(Models with Flourescent Lited Doors)

ELECTRICAL SCHEMATIC DIAGRAM for JDF-4D

(Press & Release Models)

ELECTRICAL SCHEMATIC DIAGRAM for JDF-4D

(Portion Control Models)

ELECTRICAL SCHEMATIC DIAGRAM for JDF-4S-SB

Related manuals

Bunn

JDF-2S

U.S. Sunlight

Thermal Switch

Bunn

JDF-2

Bunn

JDF Silver Series

Bunn

JDF-2S

Bunn

JDF-2S 120V LIT 2 SEG PC W/GRAPHICS

Bunn

Marine Battery JDF-2S

Bunn

JDF-4S

Table of contents