Manuals / Bunn / Kitchen Appliance / Coffeemaker

Bunn JDF-4SB SERVICE CONT Transformer - Lited Doors JDF-2S, JDF-4S, WHI/GRN - T8, WHI/BLK - T12

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

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SERVICE (CONT.)

FIG. 71 TRANSFORMER

SERVICE (CONT.)

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

	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.Disconnect the four pin plug from the main harness

from the four pin connector on the transformer.

3Check the voltage across black wire pin 1 and the white wire pin 2 on the plug from the main har- ness. Connect the dispenser to power source. The indication must be:

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 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.

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.

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.

3Disconnect 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

WHI - 120V T2, 240V T6

BLK - TI

P1647

FIG. 72 TRANSFORMER TERMINALS

49	49179	110613

Image 49

Bunn JDF-4SB SERVICE CONT Transformer - Lited Doors JDF-2S, JDF-4S, WHI/GRN - T8, WHI/BLK - T12, WHI - 120V T2, 240V T6

Contents

JDF-2S, JDF-4S JDF-4D, JDF-4SB SERVICE & REPAIR MANUALBUNN-O-MATIC CORPORATION 49179.0000C 02/14 2013 Bunn-O-Matic CorporationBUNN-O-MATIC COMMERCIAL PRODUCT WARRANTY Safety first CONTENTSBasic Maintenance Preventive MaintenanceRecommended Daily Cleaning Instructions REQUIRED REGULAR MAINTENANCE PROBLEM TROUBLESHOOTINGPROBABLE CAUSE Cold Water CirculationRefrigeration TROUBLESHOOTING ContinuedDispenser Locked Out PROBLEMPROBLEM TROUBLESHOOTING ContinuedPROBABLE CAUSE REMEDYwater only concentrate onlyTROUBLESHOOTING Continued PROBLEMPROBLEM TROUBLESHOOTING Continued1. Initial fill/setup PROBABLE CAUSEPROBLEM TROUBLESHOOTING Continuedfrom bag-in-box connector to bottle PROBABLE CAUSECOMPONENT ACCESS SERVICEFIG. 1 ACCESS PANELS SERVICECONT ACCESS PANELSJDF-4S shown 49179The JDF-4S uses 2 of the two head dispense platforms SERVICECONT DISPENSE PLATFORM REMOVALFIG. 3 BALLAST SERVICE CONT Ballast JDF-2S,4SLocation Location SERVICE CONT Cabinet Fan all ModelsFIG. 5 CABINET FAN GRN Wire SERVICE CONT LG Compressor JDF-2S,4S,4DSERVICE CONT Compressor Cont FIG. 11 COMPRESSOR SERVICE CONT GD Compressor JDF-2S,4S,4DLocation FIG.12 COMPRESSOR THERMALBLU/BLK GRN WHI SERVICE CONT Compressor ContPlugs into Relay 230V shown SERVICE CONT Compressor JDF-4SBBLU/BLK SERVICE CONT Compressor ContBLU from Capacitor BRN from CapacitorFIG. 19 COMPRESSOR SWITCH SERVICE CONT Compressor Switch all ModelsLocation RED/BLK BLKFIG. 21 CONDENSER FAN SERVICE CONT Condenser Fan all ModelsLocation BLU/BLKSERVICE CONT Control Board, Main all Models Disconnect the dispenser from the power source SERVICE CONT Portion Control Board JDF-2S,4SFIG. 28 CONTROL BOARD CONNECTORS SERVICE CONT Push Button Control Board JDF-4DPortion Control Board JDF-4D SERVICE CONTSERVICE CONT Circulation Pump all Models FIG. 33 DISPENSE PLATFORM SWITCH SERVICE CONT Dispense Platform Switch all ModelsSERVICE CONT Dispense Pump all Models except JDF-4D FIG. 38 DISPENSE MOTOR CONNECTORS SERVICE CONT Dispense Motor all ModelsFIG. 37 DISPENSE MOTOR FIG. 39 DISPENSE VALVE SERVICE CONT Dispense Valve all ModelsDispense Station #1 WHI/VIO #3 WHI/VIO Dispense Station #4 WHI/ORN YEL to Control BoardP1449 SERVICE CONT Dispense Switches JDF-2S, JDF-4SSERVICE CONT Cold Water Dispense Switch JDF-4S only Location SERVICE CONT Dispense Membrane Switch all ModelsSERVICE CONT FIG. 48 MEMBRANE SWITCHCold Water Dispense Membrane Switch all Models FIG.47 MEMBRANE SWITCHESFIG. 49 EMI FILTER SERVICE CONT EMI Filter all ModelsJDF-4S shown FIG. 51 LAMPS & HOLDERS SERVICE CONT Lamps, Holders and Ballasts Early ModelsFIG. 52 LAMP HOLDERS SERVICE CONT LED Lamps JDF-2S, JDF-4S SERVICE CONT Rectifier JDF-2S, JDF-4SFIG. 55 RECTIFIER SERVICE CONT Relay all ModelsFIG. 57 RELAY SERVICE CONT Resistor all 230V ModelsFIG. 59 RESISTOR WHI/VIO to Control Board SERVICE CONT Solenoid - Cold Water JDF-4S onlyWHI to Control Board FIG. 62 COLD WATER SOLENOIDBRN to Control Board SERVICE CONT Solenoid - Inlet all ModelsTEMP SERVICE CONT Temperature Probe all ModelsRESISTANCE VOLTAGEFIG. 67 TEMPERATURE SENSOR SERVICE CONT Temperature Sensor all ModelsTEMP RESISTANCEWHI/BLU to Control SERVICE CONT Transformer all ModelsBoard J6-1,J12-1 to ControlWHI/GRN - T8 SERVICE CONT Transformer - Lited Doors JDF-2S, JDF-4SWHI/BLK - T12 WHI - 120V T2, 240V T6Station Triac MapStation StationSCHEMATIC WIRING DIAGRAM JDF-2S DIAGRAM for JDF-2S LED Lited DoorsELECTRICAL SCHEMATIC Models with 2 WIREModels with Flourescent Lited Doors ELECTRICAL SCHEMATIC DIAGRAM for JDF-2SSCHEMATIC WIRING DIAGRAM JDF-2SSCHEMATIC WIRING DIAGRAM JDF-4S ELECTRICAL SCHEMATIC DIAGRAM for JDF-4S Models with LED Lited Doors2 WIRE SINGLE PHASESCHEMATIC WIRING DIAGRAM JDF ELECTRICAL SCHEMATIC DIAGRAM for JDF-4S2 WIRE SINGLE PHASE Models with Flourescent Lited DoorsPress & Release Models ELECTRICAL SCHEMATIC DIAGRAM for JDF-4DSCHEMATIC WIRING DIAGRAM JDF-4D 2 WIRESCHEMATIC WIRING DIAGRAM JDF-4D ELECTRICAL SCHEMATIC DIAGRAM for JDF-4D Portion Control Models2 WIRE SINGLE PHASESCHEMATIC WIRING DIAGRAM JDF-4S-SB ELECTRICAL SCHEMATIC DIAGRAM for JDF-4S-SB2 WIRE SINGLE PHASE