Manuals / Bunn / Kitchen Appliance / Coffeemaker

Bunn JDF-4S concentrate only, water only, TROUBLESHOOTING Continued, Problem, Probable Cause

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

1 57

Page 9

TROUBLESHOOTING (Continued)

PROBLEM	PROBABLE CAUSE	REMEDY
Dispense station	Water solenoid	Replace solenoid (24vdc) or check
concentrate only		wire connection between water valve
		and main control board.
Dispense station	Concentrate out	Replace refill concentrate container
water only		or BIB
	Product pump not pumping	Check for proper counterclockwise
		rotation of pump rollers. If coun-
		terclockwise, replace pump tubing.
		If clockwise, wire connection to
		pump is reversed. Switch wires on
		terminals.
	Pump not turning	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 conti-
		nuity. Then replace circuit board if
		needed.

9	49179	110613

Page 9

Image 9

Bunn JDF-4SB, JDF-4D manual concentrate only, water only, TROUBLESHOOTING Continued, Problem, Probable Cause, Remedy

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 REMOVALSERVICE CONT Ballast JDF-2S,4S FIG. 3 BALLASTLocation SERVICE CONT Cabinet Fan all Models LocationFIG. 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 THERMALSERVICE CONT Compressor Cont BLU/BLK GRN WHIPlugs 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 SERVICE CONT Dispense Motor all Models FIG. 38 DISPENSE MOTOR CONNECTORSFIG. 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 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 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 VOLTAGETEMP SERVICE CONT Temperature Sensor all ModelsRESISTANCE VOLTAGEWHI/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