Manuals / Bunn / Kitchen Appliance / Coffeemaker

Bunn JDF-4D, JDF-4SB manual SERVICE CONT Portion Control Board JDF-2S,4S

Models: JDF-4D JDF-4SB JDF-4S

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SERVICE (CONT.)

SERVICE (CONT.)

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

P4034.25

FIG. 25 PORTION CONTROL BOARD

Location:

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

Removal and Replacement:

1.Remove the five screws securing the door cover to the door frame.

2.Carefully pull the cover forward and disconnect all switch harnesses from the connectors on the control board.

3.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.

Test Procedure:
1. Disconnect the dispenser from the power source.
2. With a voltmeter, back probe check the voltage
	across pins 1 & 5 of the J6 connector on the wir-
	ing harness. Connect the dispenser to the power
	source. The indication must be 24 volts ac.			J-8
3.	Disconnect the dispenser from the power source.			J-8	J-7
					J-7
If voltage is not present as described, refer to the Wiring					J-9
Diagrams and check the dispenser wiring harness back
to the transformer (See TRANSFORMER).
				J-6
	J-1	Cold Water Switch			J-5
	J-2	Left Left Dispense Switch			J-1
	J-3	Left Middle Dispense Switch		J-4
	J-4	Right Middle Dispense Switch		J-3
	J-5	Right Right Dispense Switch		J-2
	J-6	Main Harness		J-2
	J-6	Main Harness
	J-7	N/A
	J-8	N/A
	J-9	N/A		FIG. 26 CONTROL BOARD CONNECTORS
				FIG. 26 CONTROL BOARD CONNECTORS
			26		49179	110613
					49179	110613

Image 26

Bunn JDF-4D, JDF-4SB manual SERVICE CONT Portion Control Board JDF-2S,4S, Disconnect the dispenser from the power source

Contents

BUNN-O-MATIC CORPORATION SERVICE & REPAIR MANUALJDF-2S, JDF-4S JDF-4D, JDF-4SB 49179.0000C 02/14 2013 Bunn-O-Matic CorporationBUNN-O-MATIC COMMERCIAL PRODUCT WARRANTY Basic Maintenance CONTENTSSafety first Preventive MaintenanceRecommended Daily Cleaning Instructions REQUIRED REGULAR MAINTENANCE PROBABLE CAUSE TROUBLESHOOTINGPROBLEM Cold Water CirculationDispenser Locked Out TROUBLESHOOTING ContinuedRefrigeration PROBLEMPROBABLE CAUSE TROUBLESHOOTING ContinuedPROBLEM REMEDYTROUBLESHOOTING Continued concentrate onlywater only PROBLEM1. Initial fill/setup TROUBLESHOOTING ContinuedPROBLEM PROBABLE CAUSEfrom bag-in-box connector to bottle TROUBLESHOOTING ContinuedPROBLEM PROBABLE CAUSESERVICE COMPONENT ACCESSJDF-4S shown SERVICECONT ACCESS PANELSFIG. 1 ACCESS PANELS 49179SERVICECONT DISPENSE PLATFORM REMOVAL The JDF-4S uses 2 of the two head dispense platformsLocation SERVICE CONT Ballast JDF-2S,4SFIG. 3 BALLAST FIG. 5 CABINET FAN SERVICE CONT Cabinet Fan all ModelsLocation SERVICE CONT LG Compressor JDF-2S,4S,4D GRN WireSERVICE CONT Compressor Cont Location SERVICE CONT GD Compressor JDF-2S,4S,4DFIG. 11 COMPRESSOR FIG.12 COMPRESSOR THERMALPlugs into Relay SERVICE CONT Compressor ContBLU/BLK GRN WHI SERVICE CONT Compressor JDF-4SB 230V shownBLU from Capacitor SERVICE CONT Compressor ContBLU/BLK BRN from CapacitorLocation SERVICE CONT Compressor Switch all ModelsFIG. 19 COMPRESSOR SWITCH RED/BLK BLKLocation SERVICE CONT Condenser Fan all ModelsFIG. 21 CONDENSER FAN BLU/BLKSERVICE CONT Control Board, Main all Models SERVICE CONT Portion Control Board JDF-2S,4S Disconnect the dispenser from the power sourceSERVICE CONT Push Button Control Board JDF-4D FIG. 28 CONTROL BOARD CONNECTORSSERVICE CONT Portion Control Board JDF-4DSERVICE CONT Circulation Pump all Models SERVICE CONT Dispense Platform Switch all Models FIG. 33 DISPENSE PLATFORM SWITCHSERVICE CONT Dispense Pump all Models except JDF-4D FIG. 37 DISPENSE MOTOR SERVICE CONT Dispense Motor all ModelsFIG. 38 DISPENSE MOTOR CONNECTORS Dispense Station #1 WHI/VIO SERVICE CONT Dispense Valve all ModelsFIG. 39 DISPENSE VALVE #3 WHI/VIO Dispense Station #4 WHI/ORN YEL to Control BoardSERVICE CONT Dispense Switches JDF-2S, JDF-4S P1449SERVICE CONT Cold Water Dispense Switch JDF-4S only SERVICE CONT Dispense Membrane Switch all Models LocationCold Water Dispense Membrane Switch all Models FIG. 48 MEMBRANE SWITCHSERVICE CONT FIG.47 MEMBRANE SWITCHESJDF-4S shown SERVICE CONT EMI Filter all ModelsFIG. 49 EMI FILTER FIG. 52 LAMP HOLDERS SERVICE CONT Lamps, Holders and Ballasts Early ModelsFIG. 51 LAMPS & HOLDERS SERVICE CONT LED Lamps JDF-2S, JDF-4S FIG. 55 RECTIFIER Rectifier JDF-2S, JDF-4SSERVICE CONT FIG. 57 RELAY Relay all ModelsSERVICE CONT FIG. 59 RESISTOR Resistor all 230V ModelsSERVICE CONT WHI to Control Board SERVICE CONT Solenoid - Cold Water JDF-4S onlyWHI/VIO to Control Board FIG. 62 COLD WATER SOLENOIDSERVICE CONT Solenoid - Inlet all Models BRN to Control BoardRESISTANCE SERVICE CONT Temperature Probe all ModelsTEMP VOLTAGETEMP SERVICE CONT Temperature Sensor all ModelsFIG. 67 TEMPERATURE SENSOR RESISTANCEBoard J6-1,J12-1 SERVICE CONT Transformer all ModelsWHI/BLU to Control to ControlWHI/BLK - T12 SERVICE CONT Transformer - Lited Doors JDF-2S, JDF-4SWHI/GRN - T8 WHI - 120V T2, 240V T6Station Triac MapStation StationELECTRICAL SCHEMATIC Models with DIAGRAM for JDF-2S LED Lited DoorsSCHEMATIC WIRING DIAGRAM JDF-2S 2 WIRESCHEMATIC WIRING ELECTRICAL SCHEMATIC DIAGRAM for JDF-2SModels with Flourescent Lited Doors DIAGRAM JDF-2S2 WIRE ELECTRICAL SCHEMATIC DIAGRAM for JDF-4S Models with LED Lited DoorsSCHEMATIC WIRING DIAGRAM JDF-4S SINGLE PHASE2 WIRE SINGLE PHASE ELECTRICAL SCHEMATIC DIAGRAM for JDF-4SSCHEMATIC WIRING DIAGRAM JDF Models with Flourescent Lited DoorsSCHEMATIC WIRING DIAGRAM JDF-4D ELECTRICAL SCHEMATIC DIAGRAM for JDF-4DPress & Release Models 2 WIRE2 WIRE ELECTRICAL SCHEMATIC DIAGRAM for JDF-4D Portion Control ModelsSCHEMATIC WIRING DIAGRAM JDF-4D SINGLE PHASE2 WIRE ELECTRICAL SCHEMATIC DIAGRAM for JDF-4S-SBSCHEMATIC WIRING DIAGRAM JDF-4S-SB SINGLE PHASE