Bunn JDF-4D Compressor Relay Q25, Water Q27, Water Q28, Water Q7, Cold Water Valve Q11, Water Q8

Page 50

Triac Map

1.	Compressor Relay Q25
2.	Station 2	Water Q27
3.	Station 1	Water Q28
4.	Station 1	Concentrate Q23
5.	Station 2	Concentrate Q18

110

9

6.	Station 3	Concentrate Q17
7.	Station 4	Concentrate Q13
8.	Station 3	Water Q7
9.	Cold Water Valve Q11
10.	Inlet Water Valve Q10
11.	Station 4	Water Q8

2

6 7

4 5

3

8

11

50	49179	012214

Image 50

Contents JDF-4D, JDF-4SB Phone 217 529-6601 FAX 217BUNN-O-MATIC Commercial Product Warranty Introduction Recommended Daily Cleaning Instructions Required Regular Maintenance Remedy Problem Probable CauseCold Water Circulation Dispenser Locked Out Problem Probable Cause RemedyRefrigeration Ed replace relay When dispensing. If yes, replaceContinuity Check for kinked flex lineConcentrate only Water onlyWater pressure greater than Nect fittingsTray 100psiUnit is not working Pump tubing Inspect, clean, or replace tubing AgeAdapter assembly Replace control boardService Component AccessServicecont Access Panels Access PanelsServicecont Dispense Platform Removal Dispense Platform RemovalBallast JDF-2S,4S ServiceTest Procedure LocationRemove the four screws attaching the fan and cover assembly Cabinet Fan all ModelsLG Compressor JDF-2S,4S,4D LocationCompressor Design Pressures High 335 Low 88 psiGD Compressor JDF-2S,4S,4D CompressorDisconnect and remove the transformer Compressor JDF-4SB Compressor ThermalBLU/BLK Compressor Switch all Models Compressor SwitchCondenser Fan all Models Condenser FANTest Procedure Power Supply Circuitry Control Board, Main all ModelsSource. The indication must be 24 volts ac Portion Control Board JDF-2S,4SWith a voltmeter, back probe check the voltage To the transformer See TransformerPush Button Control Board JDF-4D Push Button Control BoardPortion Control Board JDF-4D Circulation Pump all Models With a voltmeterReturn power to the dispenser Dispense Platform Switch all ModelsDisconnect the two black wires from the switch Dispense Pump all Models except JDF-4D Dispense PumpReconnect the two wires to the motor as shown in Fig Dispense Motor all ModelsDispense Valve all Models Dispense ValveDispense Switches JDF-2S, JDF-4S Dispense SwitchesCold Water Dispense Switch JDF-4S only Cold Water Dispense SwitchDispense Membrane Switch all Models LocationMembrane Switch EMI Filter all Models EMI FilterLamps, Holders and Ballasts Early Models Lamps & HoldersLED regulator board Disconnect power from the dispenserLED Lamps JDF-2S, JDF-4S Rectifier JDF-2S, JDF-4S RectifierVolts ac for 120 volt models Volts ac for 230 volt models Refer to to reconnect the wiresRelay all Models Resistor all 230V Models ResistorSolenoid Cold Water JDF-4S only If voltage is present as described, proceed to #5Solenoid Inlet all Models 120V 1.2 kΩ 230V 3.84 kΩ32 F 31.2k 34k Ω Temperature Probe all ModelsTemp Resistance Voltage 77 F 8k 10.2k Ω 77 F 350 Ω Temperature Sensor all Models 32 F 5k Ω Transformer all Models Transformer TerminalsTransformer Lited Doors JDF-2S, JDF-4S Water Q28 Compressor Relay Q25Water Q27 Water Q7Diagram for JDF-2S LED Lited Doors Schematic Wiring Schematic Wiring Diagram JDF-4S Schematic Wiring Diagram JDF Schematic Wiring Diagram JDF-4D Schematic Wiring Diagram JDF-4D Electrical Schematic Diagram

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