Manuals / Bunn / Kitchen Appliance / Coffeemaker

Bunn JDF-4SB, JDF-4D SERVICE CONT Transformer all Models, WHI/BLU to Control, Board J6-1,J12-1

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

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SERVICE (CONT.)

FIG. 69 TRANSFORMER

SERVICE (CONT.)

Transformer (all Models)

	AC
A C	+

P3864

Location:

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

Test Procedure:

1.Disconnect the dispenser from the power source.

2.Check the voltage across black wire and the white wire from the main harness. Connect the dispenser to power source. The indication must be:

a)120 volts ac for two wire 120 volt models, three wire 120/208 volt and three wire 120/240 volt models.

b)240 volts ac for two wire 240 volt models.

c)230 volts ac for two wire 230 volt models.

4. Disconnect the dispenser from the power source.

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

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.

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.

3Remove 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.

	WHI from
WHI/BLU to Control	Power Cord
Board J6-1,J12-1	BLK from
	Power Cord
BLU	to Control
Board J6-3,J12-3
	P1647
FIG. 70 TRANSFORMER TERMINALS

48	49179	110613

Image 48

Bunn JDF-4SB, JDF-4D manual SERVICE CONT Transformer all Models, WHI/BLU to Control, Board J6-1,J12-1, Board J6-3,J12-3

Contents

SERVICE & REPAIR MANUAL JDF-2S, JDF-4S JDF-4D, JDF-4SBBUNN-O-MATIC CORPORATION 49179.0000C 02/14 2013 Bunn-O-Matic CorporationBUNN-O-MATIC COMMERCIAL PRODUCT WARRANTY CONTENTS Safety firstBasic Maintenance Preventive MaintenanceRecommended Daily Cleaning Instructions REQUIRED REGULAR MAINTENANCE TROUBLESHOOTING PROBLEMPROBABLE CAUSE Cold Water CirculationTROUBLESHOOTING Continued RefrigerationDispenser Locked Out PROBLEMTROUBLESHOOTING Continued PROBLEMPROBABLE CAUSE REMEDYconcentrate only water onlyTROUBLESHOOTING Continued PROBLEMTROUBLESHOOTING Continued PROBLEM1. Initial fill/setup PROBABLE CAUSETROUBLESHOOTING Continued PROBLEMfrom bag-in-box connector to bottle PROBABLE CAUSESERVICE COMPONENT ACCESSSERVICECONT ACCESS PANELS FIG. 1 ACCESS PANELSJDF-4S shown 49179SERVICECONT DISPENSE PLATFORM REMOVAL The JDF-4S uses 2 of the two head dispense platformsSERVICE CONT Ballast JDF-2S,4S FIG. 3 BALLASTLocation SERVICE CONT Cabinet Fan all Models LocationFIG. 5 CABINET FAN SERVICE CONT LG Compressor JDF-2S,4S,4D GRN WireSERVICE CONT Compressor Cont SERVICE CONT GD Compressor JDF-2S,4S,4D FIG. 11 COMPRESSORLocation FIG.12 COMPRESSOR THERMALSERVICE CONT Compressor Cont BLU/BLK GRN WHIPlugs into Relay SERVICE CONT Compressor JDF-4SB 230V shownSERVICE CONT Compressor Cont BLU/BLKBLU from Capacitor BRN from CapacitorSERVICE CONT Compressor Switch all Models FIG. 19 COMPRESSOR SWITCHLocation RED/BLK BLKSERVICE CONT Condenser Fan all Models FIG. 21 CONDENSER FANLocation 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 SERVICE CONT Dispense Motor all Models FIG. 38 DISPENSE MOTOR CONNECTORSFIG. 37 DISPENSE MOTOR SERVICE CONT Dispense Valve all Models FIG. 39 DISPENSE VALVEDispense Station #1 WHI/VIO #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 LocationFIG. 48 MEMBRANE SWITCH SERVICE CONTCold Water Dispense Membrane Switch all Models FIG.47 MEMBRANE SWITCHESSERVICE CONT EMI Filter all Models FIG. 49 EMI FILTERJDF-4S shown SERVICE CONT Lamps, Holders and Ballasts Early Models FIG. 51 LAMPS & HOLDERSFIG. 52 LAMP HOLDERS SERVICE CONT LED Lamps JDF-2S, JDF-4S Rectifier JDF-2S, JDF-4S SERVICE CONTFIG. 55 RECTIFIER Relay all Models SERVICE CONTFIG. 57 RELAY Resistor all 230V Models SERVICE CONTFIG. 59 RESISTOR SERVICE CONT Solenoid - Cold Water JDF-4S only WHI/VIO to Control BoardWHI to Control Board FIG. 62 COLD WATER SOLENOIDSERVICE CONT Solenoid - Inlet all Models BRN to Control BoardSERVICE CONT Temperature Probe all Models TEMPRESISTANCE VOLTAGESERVICE CONT Temperature Sensor all Models FIG. 67 TEMPERATURE SENSORTEMP RESISTANCESERVICE CONT Transformer all Models WHI/BLU to ControlBoard J6-1,J12-1 to ControlSERVICE CONT Transformer - Lited Doors JDF-2S, JDF-4S WHI/GRN - T8WHI/BLK - T12 WHI - 120V T2, 240V T6Triac Map StationStation StationDIAGRAM for JDF-2S LED Lited Doors SCHEMATIC WIRING DIAGRAM JDF-2SELECTRICAL SCHEMATIC Models with 2 WIREELECTRICAL SCHEMATIC DIAGRAM for JDF-2S Models with Flourescent Lited DoorsSCHEMATIC WIRING DIAGRAM JDF-2SELECTRICAL SCHEMATIC DIAGRAM for JDF-4S Models with LED Lited Doors SCHEMATIC WIRING DIAGRAM JDF-4S2 WIRE SINGLE PHASEELECTRICAL SCHEMATIC DIAGRAM for JDF-4S SCHEMATIC WIRING DIAGRAM JDF2 WIRE SINGLE PHASE Models with Flourescent Lited DoorsELECTRICAL SCHEMATIC DIAGRAM for JDF-4D Press & Release ModelsSCHEMATIC WIRING DIAGRAM JDF-4D 2 WIREELECTRICAL SCHEMATIC DIAGRAM for JDF-4D Portion Control Models SCHEMATIC WIRING DIAGRAM JDF-4D2 WIRE SINGLE PHASEELECTRICAL SCHEMATIC DIAGRAM for JDF-4S-SB SCHEMATIC WIRING DIAGRAM JDF-4S-SB2 WIRE SINGLE PHASE