BUNN-O-MATIC CORPORATION
SERVICE & REPAIR MANUAL
JDF-2S, JDF-4S JDF-4D, JDF-4SB
49179.0000C 02/14 2013 Bunn-O-Matic Corporation
BUNN-O-MATIC COMMERCIAL PRODUCT WARRANTY
Basic Maintenance
CONTENTS
Safety first
Preventive Maintenance
Recommended Daily Cleaning Instructions
REQUIRED REGULAR MAINTENANCE
PROBABLE CAUSE
TROUBLESHOOTING
PROBLEM
Cold Water Circulation
Dispenser Locked Out
TROUBLESHOOTING Continued
Refrigeration
PROBLEM
PROBABLE CAUSE
TROUBLESHOOTING Continued
PROBLEM
REMEDY
TROUBLESHOOTING Continued
concentrate only
water only
PROBLEM
1. Initial fill/setup
TROUBLESHOOTING Continued
PROBLEM
PROBABLE CAUSE
from bag-in-box connector to bottle
TROUBLESHOOTING Continued
PROBLEM
PROBABLE CAUSE
SERVICE
COMPONENT ACCESS
JDF-4S shown
SERVICECONT ACCESS PANELS
FIG. 1 ACCESS PANELS
49179
SERVICECONT DISPENSE PLATFORM REMOVAL
The JDF-4S uses 2 of the two head dispense platforms
Location
SERVICE CONT Ballast JDF-2S,4S
FIG. 3 BALLAST
FIG. 5 CABINET FAN
SERVICE CONT Cabinet Fan all Models
Location
SERVICE CONT LG Compressor JDF-2S,4S,4D
GRN Wire
SERVICE CONT Compressor Cont
Location
SERVICE CONT GD Compressor JDF-2S,4S,4D
FIG. 11 COMPRESSOR
FIG.12 COMPRESSOR THERMAL
Plugs into Relay
SERVICE CONT Compressor Cont
BLU/BLK GRN WHI
SERVICE CONT Compressor JDF-4SB
230V shown
BLU from Capacitor
SERVICE CONT Compressor Cont
BLU/BLK
BRN from Capacitor
Location
SERVICE CONT Compressor Switch all Models
FIG. 19 COMPRESSOR SWITCH
RED/BLK BLK
Location
SERVICE CONT Condenser Fan all Models
FIG. 21 CONDENSER FAN
BLU/BLK
SERVICE CONT Control Board, Main all Models
SERVICE CONT Portion Control Board JDF-2S,4S
Disconnect the dispenser from the power source
SERVICE CONT Push Button Control Board JDF-4D
FIG. 28 CONTROL BOARD CONNECTORS
SERVICE CONT
Portion Control Board JDF-4D
SERVICE CONT Circulation Pump all Models
SERVICE CONT Dispense Platform Switch all Models
FIG. 33 DISPENSE PLATFORM SWITCH
SERVICE CONT Dispense Pump all Models except JDF-4D
FIG. 37 DISPENSE MOTOR
SERVICE CONT Dispense Motor all Models
FIG. 38 DISPENSE MOTOR CONNECTORS
Dispense Station #1 WHI/VIO
SERVICE CONT Dispense Valve all Models
FIG. 39 DISPENSE VALVE
#3 WHI/VIO Dispense Station #4 WHI/ORN YEL to Control Board
SERVICE CONT Dispense Switches JDF-2S, JDF-4S
P1449
SERVICE CONT Cold Water Dispense Switch JDF-4S only
SERVICE CONT Dispense Membrane Switch all Models
Location
Cold Water Dispense Membrane Switch all Models
FIG. 48 MEMBRANE SWITCH
SERVICE CONT
FIG.47 MEMBRANE SWITCHES
JDF-4S shown
SERVICE CONT EMI Filter all Models
FIG. 49 EMI FILTER
FIG. 52 LAMP HOLDERS
SERVICE CONT Lamps, Holders and Ballasts Early Models
FIG. 51 LAMPS & HOLDERS
SERVICE CONT LED Lamps JDF-2S, JDF-4S
FIG. 55 RECTIFIER
Rectifier JDF-2S, JDF-4S
SERVICE CONT
FIG. 57 RELAY
Relay all Models
SERVICE CONT
FIG. 59 RESISTOR
Resistor all 230V Models
SERVICE CONT
WHI to Control Board
SERVICE CONT Solenoid - Cold Water JDF-4S only
WHI/VIO to Control Board
FIG. 62 COLD WATER SOLENOID
SERVICE CONT Solenoid - Inlet all Models
BRN to Control Board
RESISTANCE
SERVICE CONT Temperature Probe all Models
TEMP
VOLTAGE
TEMP
SERVICE CONT Temperature Sensor all Models
FIG. 67 TEMPERATURE SENSOR
RESISTANCE
Board J6-1,J12-1
SERVICE CONT Transformer all Models
WHI/BLU to Control
to Control
WHI/BLK - T12
SERVICE CONT Transformer - Lited Doors JDF-2S, JDF-4S
WHI/GRN - T8
WHI - 120V T2, 240V T6
Station
Triac Map
Station
Station
ELECTRICAL SCHEMATIC Models with
DIAGRAM for JDF-2S LED Lited Doors
SCHEMATIC WIRING DIAGRAM JDF-2S
2 WIRE
SCHEMATIC WIRING
ELECTRICAL SCHEMATIC DIAGRAM for JDF-2S
Models with Flourescent Lited Doors
DIAGRAM JDF-2S
2 WIRE
ELECTRICAL SCHEMATIC DIAGRAM for JDF-4S Models with LED Lited Doors
SCHEMATIC WIRING DIAGRAM JDF-4S
SINGLE PHASE
2 WIRE SINGLE PHASE
ELECTRICAL SCHEMATIC DIAGRAM for JDF-4S
SCHEMATIC WIRING DIAGRAM JDF
Models with Flourescent Lited Doors
SCHEMATIC WIRING DIAGRAM JDF-4D
ELECTRICAL SCHEMATIC DIAGRAM for JDF-4D
Press & Release Models
2 WIRE
2 WIRE
ELECTRICAL SCHEMATIC DIAGRAM for JDF-4D Portion Control Models
SCHEMATIC WIRING DIAGRAM JDF-4D
SINGLE PHASE
2 WIRE
ELECTRICAL SCHEMATIC DIAGRAM for JDF-4S-SB
SCHEMATIC WIRING DIAGRAM JDF-4S-SB
SINGLE PHASE
