Instruction/ maintenance manual of the product JDF-4S Bunn
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JDF-2S, JDF-4S JDF-4D, JDF-4SB SER VICE & REP AIR MANU AL BUNN-O-MA TIC CORPORA TION POST OFFICE BOX 3227 SPRINGFIELD, ILLINOIS 62708-3227 PHONE: (217) 529-6601 F AX: (217) 529-6644 T o ensure you.
2 BUNN-O-MA TIC 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, MCP/MCA pod brewers thermal ser vers and Thermofresh servers (mechanical and digital)- 1 year parts and 1 year labor .
3 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. CONTENTS Warranty ...................................................................
4 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 .
5 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 Pump T ube Replacement Kit (Includes items indented below) 28755.
6 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 T echnical Ser vice Department.
7 PROBLEM PROBABLE CAUSE REMEDY TROUBLESHOOTING (Continued) Check for "ON" position or no continu - ity - replace switch. Clean filter and fins or replace con- denser filter . (Filter not supplied on some machines). A) Check for 120V or 230V AC.
8 PROBLEM PROBABLE CAUSE REMEDY TROUBLESHOOTING (Continued) Dispense station not working All stations dispense concentrate only 1. Dispense Lockout switch set to OFF position. 2. Dispense switch failed Main water supply Frozen bath Inlet water valve failed Place switch in ON position.
9 PROBLEM PROBABLE CAUSE REMEDY TROUBLESHOOTING (Continued) Dispense station concentrate only Dispense station water only 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.
10 PROBLEM PROBABLE CAUSE REMEDY TROUBLESHOOTING (Continued) Water leak filling drip tray or around dispense deck area Water leaking beneath machine Erratic spray during dispense Dispense nozzle dripping water 1. Initial fill/setup 2. Dispense deck 3.
11 PROBLEM PROBABLE CAUSE REMEDY TROUBLESHOOTING (Continued) Unit is not working Difficulty brixing and/or weak bever - age Difficulty brixing and/or weak bever - age Difficulty brixing bag-in-box 1. Step-down transformer . 2. Main control board. 1.
12 SERVICE This section provides procedures for testing and replacing various major components used in this dispenser should service become necessar y .
13 SERVICE(CONT .) ACCESS P ANELS 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.
14 SERVICE(CONT .) DISPENSE PLA TFORM REMOV AL 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).
15 SERVICE (CONT .) Ballast (JDF-2S,4S) P1684.40 FIG. 3 BALLAST Location: The door lamp ballast is located inside the dispenser door mounted in the center of the door rear cover . T est Procedure: 1. Disconnect the dispenser from the power source. 2. Disconnect a black and blue wire from one set of lamp sockets.
16 SERVICE (CONT .) Cabinet Fan (all Models) P1684.40 FIG. 5 CABINET F AN Location: The cabinet fan is located inside the dispenser cabinet mounted in the center behind the fan guard cover . T est Procedure: 1. Disconnect the dispenser from the power source.
17 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. T est Procedures: Compressor Relay: Refer to FIG. 8 1. Disconnect the dispenser from the power source. 2.
18 SERVICE (CONT .) Compressor (Cont.) Removal and Replacement: Compressor Relay: Refer to FIG. 8 1. Remove the terminal cover (1) 2. Disconnect the white wire from the compressor relay . 3. Pull relay (2) off of the compressor pins and discard. 4. Push new relay onto the compressor pins.
19 SERVICE (CONT .) GD Compressor (JDF-2S,4S,4D) P1684.40 FIG. 11 COMPRESSOR Location: The compressor is located at the top of the dispenser frame. T est Procedures: Compressor Start Relay: Refer to FIG. 12 WARNING: The compressor capacitor must be properly discharged before proceeding.
20 SERVICE (CONT .) Compressor (Cont.) Removal and Replacement: Compressor Start Relay: Refer to FIG. 12 1. Remove the terminal cover (4) 2. Disconnect the wires from the compressor start relay . 3. Pull relay (1) off of the compressor pins and dis- card.
21 SERVICE (CONT .) Compressor (JDF-4SB) P1684.40 FIG. 15 COMPRESSOR Location: The compressor is located at the top of the dispenser frame. T est Procedures: Compressor Start Relay: Refer to FIG. 16 WARNING: The compressor capacitor must be properly discharged before proceeding.
22 SERVICE (CONT .) Compressor (Cont.) Removal and Replacement: Compressor Start Relay: Refer to FIG. 16 1. Remove the terminal cover (4) 2. Disconnect the wires from the compressor start relay . 3. Pull relay (1) off of the compressor pins and dis- card.
23 SERVICE (CONT .) Compressor Switch (all Models) 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.
24 SERVICE (CONT .) Condenser Fan (all Models) P1684.40 FIG. 21 CONDENSER F AN Location: The condenser fan is located inside the main frame below the compressor assembly . T est Procedure: 1. Disconnect the dispenser from the power source. 2. Disconnect the 2-pin from the fan to the main wiring harness.
25 SERVICE (CONT .) Control Board, Main (all Models) FIG. 23 CONTROL BOARD P3250.25 Location: The Main Control Board is located on the electrical component enclosure behind the splash panel. T est Procedure: Power Supply Circuitry: 1. Disconnect the dispenser from the power source.
26 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. T est Procedure: 1. Disconnect the dispenser from the power source.
27 SERVICE (CONT .) Push Button Control Board (JDF-4D) FIG. 27 PUSH BUTTON CONTROL BOARD P4081.25 Location: The Push Button Control Board is located inside the door cover mounted on the bracket. T est Procedure: 1. Disconnect the dispenser from the power source.
28 POWE R C O O L ING SERVICE (CONT .) Portion Control Board (JDF-4D) FIG. 29 PORTION CONTROL BOARD Location: The Portion Control Board is located inside the door cover mounted on the bracket. T est Procedure: 1. Disconnect the dispenser from the power source.
29 SERVICE (CONT .) Circulation Pump (all Models) FIG. 31 CIRCULA TION PUMP Location: The Circulation Pump is located on top of the water bath tank cover . T est Procedure: 1. Disconnect the dispenser from the power source. 2. With a voltmeter . If voltage is present as described, proceed to step 4.
30 SERVICE (CONT .) Dispense Platform Switch (all Models) FIG. 33 DISPENSE PLA TFORM SWITCH Location: The Dispense Platform Switch is located below the dispenser in the front center and is mounted on the component mounting bracket. T est Procedure: 1.
31 SERVICE (CONT .) Dispense Pump (all Models except JDF-4D) 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.
32 SERVICE (CONT .) Dispense Motor (all Models) FIG. 37 DISPENSE MOTOR Location: The Dispense Motors are located on the rear of the platform assembly . T est Procedure: 1. Disconnect the dispenser from the power source. 2. With a voltmeter , check the voltage across the two wire terminals of the motor assembly .
33 SERVICE (CONT .) Dispense Valve (all Models) FIG. 39 DISPENSE V AL VE Location: The Dispense Valves are located at the front of the platform assembly . T est Procedure: 1. Disconnect the dispenser from the power source. 2. With a voltmeter , check the voltage across the two wire terminals of the valve solenoid.
34 SERVICE (CONT .) Dispense Switches (JDF-2S, JDF-4S) FIG. 41 DISPENSE SWITCHES P1449 FIG. 42 DISPENSE SWITCH TERMINALS Station #1 Station #2 Station #3 BLK RED BLK GRN Location: The dispense switches are located on the lower outside of the dispenser door .
35 SERVICE (CONT .) Cold Water Dispense Switch (JDF-4S only) FIG. 43 COLD WA TER DISPENSE SWITCH P1449 FIG. 44 COLD WA TER SWITCH TERMINALS BLK BLU Location: The cold water dispense switch is located on the lower outside of the dispenser door . T est Procedure: 1.
36 COLD WA TER SERVICE (CONT .) Dispense Membrane Switch (all Models) 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 .
37 SERVICE (CONT .) Cold Water Dispense Membrane Switch (all Models) FIG.47 MEMBRANE SWITCHES Location: The dispense buttons are located on the lower outside of the dispenser door and actuate switches on the dispense switch board located on the inside of the door .
38 SERVICE (CONT .) EMI Filter (all Models) FIG. 49 EMI FIL TER Location: The EMI Filter is located on the electrical component mounting bracket on the lower front of the dispenser behind the splash panel. T est Procedure: 1. Disconnect the dispenser from the power source.
39 SERVICE (CONT .) Lamps, Holders and Ballast(s) (Early Models) FIG. 51 LAMPS & HOLDERS Location: The lamps and lamp holders are located on the door light panel behind the door cover . T est Procedure: 1. Disconnect the dispenser from the power source.
40 SERVICE (CONT .) LED Lamps (JDF-2S, JDF-4S) Removal and Replacement: 1. Disconnect power from the dispenser . 2. Remove the five #6-32 screws securing the door cover to the door . 3. Carefully lower the door cover and disconnect the lamp terminals from the LED regulator board.
41 SERVICE (CONT .) Rectifier (JDF-2S, JDF-4S) Removal and Replacement: 1. Disconnect the wires from the rectifier . 2. Remove the #10-32 screw securing the rectifier . 3. Remove the rectifier and discard. 4. Secure new rectifier with #10-32 screw .
42 12 11 9 8 7 SERVICE (CONT .) Relay (all Models) FIG. 57 RELA Y 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. T urn on power and check for continuity across terminals on relay .
43 12 11 9 8 7 SERVICE (CONT .) Resistor (all 230V Models) Removal and Replacement: 1. Disconnect the dispenser from the power source. 2. Disconnect the resistor from the relay and discard. 3. Install new resistor to the relay as shown below . 4. Return power to the dispenser .
44 SERVICE (CONT .) Solenoid - Cold Water (JDF-4S only) FIG. 62 COLD WA TER SOLENOID TERMINALS FIG. 61 COLD WA TER DISPENSE SOLENOID Location: The Cold Water dispense solenoid is located at the inside rear of the chassis frame. T est Procedures: 1. Disconnect the dispenser from the power source.
45 SERVICE (CONT .) Solenoid - Inlet (all Models) FIG. 63 INLET SOLENOID V AL VE P1445.40 Location: The inlet solenoid is located inside on the rear of the dispenser base. T est Procedures: 1 . Disconnect the dispenser from the power source. 2 . Disconnect the two wires from the solenoid valve.
46 SERVICE (CONT .) T emperature Probe (all Models) FIG. 65 TEMPERA TURE PROBE FIG. 66 TEMPERA TURE PROBE Location: The temperature probe is located on the top of the tank assembly . T est Procedure: 1. Disconnect the dispenser from the power source. 2.
47 SERVICE (CONT .) T emperature Sensor (all Models) FIG. 68 TEMPERA TURE SENSOR FIG. 67 TEMPERA TURE SENSOR Location: The T emperature Sensor is located inside the cabinet between the fan and the water coil. T est Procedures: 1. Remove the left side housing panel.
48 + A C A C SERVICE (CONT .) T ransformer (all Models) Removal and Replacement: 1. Loosen the two #8-32 screws securing the com- ponent 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.
49 SERVICE (CONT .) T ransformer - Lited Doors (JDF-2S, JDF-4S) Removal and Replacement: 1. Loosen the two #8-32 screws securing the com- ponent bracket to the dispenser housing base. 2. Pull component bracket out the front of the dispenser far enough so the transformer connector can be disconnected from the main wiring harness.
50 T riac Map 49179 012214 1 2 3 4 5 6 7 8 9 10 1 1 1. Compressor Relay Q25 2. Station 2 Water Q27 3. Station 1 Water Q28 4. Station 1 Concentrate Q23 5. Station 2 Concentrate Q18 6. Station 3 Concentrate Q17 7. Station 4 Concentrate Q13 8. Station 3 Water Q7 9.
51 ELECTRICAL SCHEMA TIC DIAGRAM for JDF-2S (Models with LED Lited Doors) J6-1 J11-1 J11-5 J6-1 J6-5 J6-3 J5-1 J5-4 J2-1 J2-6 GRN WHI/ORN LEFT DISPENSE RIGHT DISPENSE LEFT DISPENSE RIGHT DISPENSE YEL YEL WHI/VIO RECIR.
52 J6-1 J11-1 J11-5 J6-1 J6-5 J6-3 C O N T R O L P C B O A R D J5-1 J5-4 J2-1 J2-6 GRN WHI/ORN LEFT DISPENSE RIGHT DISPENSE LEFT DISPENSE RIGHT DISPENSE YEL YEL WHI/VI O RECIR.
53 ELECTRICAL SCHEMA TIC DIAGRAM for JDF-4S (Models with LED Lited Doors) J6-1 J6-3 J5-1 J5-4 J2-1 J2-6 GRN WHI/ORN STA TION 1 DISPENSE STA TION 2 DISPENSE STA TION 1 DISPENSE STA TION 2 DISPENSE YEL YEL WHI/VIO RECIR.
54 J6-1 J6-3 C O N T R O L P C B O A R D J5-1 J5-4 J2-1 J2-6 GRN WHI/ORN ST AT ION 1 DISPENSE ST AT ION 2 DISPENSE ST AT ION 1 DISPENSE ST AT ION 2 DISPENSE YE LY EL WHI/VIO RECIR.
55 J6-1 J6-3 C O N T R O L P C B O A R D J5-1 J5-4 J2-1 J2-6 GRN ST AT ION 1 DISPENSE RECIR. PUMP BRN WHI BLK J1-1 J1-5 WHI J3-1 J3-2 WHI/BLK RED RED WHI/RED BLK WHI RED/BLK RED/BLK WHI/BLU BLU MOTOR .
56 ELECTRICAL SCHEMA TIC DIAGRAM for JDF-4D (Portion Control Models) J6-1 J6-3 J5-1 J5-4 J2-1 J2-6 GRN STA TION 1 DISPENSE RECIR. PUMP BRN WHI BLK J1-1 J1-5 WHI J3-1 J3-2 WHI/BLK RED RED WHI/RED BLK W.
57 J6-1 J6-3 J5-1 J5-4 J2-1 J2-6 GRN WHI/ORN STA TION 1 DISPENSE STA TION 2 DISPENSE STA TION 1 DISPENSE STA TION 2 DISPENSE YEL YEL WHI/VIO RECIR. PUMP BRN WHI BLK J1-1 J1-5 WHI J3-1 J3-2 WHI/BLK ORN.
An important point after buying a device Bunn JDF-4S (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Bunn JDF-4S yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Bunn JDF-4S - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Bunn JDF-4S you will learn all the available features of the product, as well as information on its operation. The information that you get Bunn JDF-4S will certainly help you make a decision on the purchase.
If you already are a holder of Bunn JDF-4S, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Bunn JDF-4S.
However, one of the most important roles played by the user manual is to help in solving problems with Bunn JDF-4S. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Bunn JDF-4S along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
