Bunn H5X, H5E, DV manual Service Solenoid Valve Early Models

Page 15

SERVICE (cont.)

Solenoid Valve (Early Models)

Location:

The solenoid valve is located behind the large access panel on the left side of the dispenser.

To test the solenoid valve, access will also be needed to the electronic control board.

BUNN

H 10

P1994

FIG. 15a SOLENOID VALVE

Test Procedure:

1.Disconnect the dispenser from the power source and turn off the water supply to the dispenser.

2.Remove the pink wire from terminal 5 of the elec- tronic control board.

3.Check the voltage across the solenoid valve coil terminals with a voltmeter. Connect the dispenser to the power source. The indication must be 200 to 240 volts ac for 200 to 240 volt models after a delay of approximately 5 seconds.

4.Disconnect the dispenser from the power source.

If voltage was present as described, proceed to #5. If voltage was not present as described, refer to the Wir- ing Diagrams and check the dispenser wiring harness.

5.Remove both wires from the solenoid valve coil terminals.

6.Check for continuity across the solenoid valve coil terminals.

If continuity is present as described, reconnect the wires and proceed to #7.

If continuity is not present as described, replace the solenoid valve coil.

7.Check the solenoid valve for coil action. Connect the dispenser to the power source. Listen carefully in the vicinity of the solenoid valve for a “clicking” sound after approximately 5 seconds, as the coil magnet attracts the plunger.

8.Disconnect the dispenser from the power source.

9.Reconnect the pink wire to terminal 5 of the elec- tronic control board.

If the sound was heard as described and water will not pass through the solenoid valve, there may be a blockage in the water line before or after the solenoid valve or the solenoid valve may require inspection for wear and removal of waterborne particles.

If the sound was not heard as described, replace the solenoid valve.

Removal and Replacement:

1.Remove all wires from the solenoid valve coil.

2.Turn off the water supply to the dispenser.

3.Disconnect the water lines to and from the solenoid valve.

4.Remove the two 8-32 slotted-head screws holding the solenoid valve and mounting bracket to the component bracket.

5.Lift out the solenoid valve.

6.Remove the two 10-32 slotted-head screws holding the solenoid valve to its mounting bracket.

7.Securely install the new solenoid valve to its mount- ing bracket. The direction of flow arrow must be pointing towards the tank lid.

8.Attach the solenoid valve and mounting bracket to the component bracket.

9.Securely fasten the water lines to and from the solenoid valve.

10.Reconnect the wires, FIG. 8.

WHI/BLU to Contol

Board T1

RED to Terminal Block

RED to Control Board T4

P1779

FIG. 15b SOLENOID VALVE WIRING

15

42311 071310

 

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Contents Phone 217 529-6601 FAX 217 H5E/DV PCBUNN-O-MATIC Commercial Product Warranty 19-23 ContentsFlashes Problem Probable Cause RemedyProblem Probable Cause Deposits. Delime as required Water boils continuously Temperature controlNoises Water supply Ready indicator will not light Lime build-upComponent Access H10X Component Access H5E/DV-PC/XLiquid Level Control Flow Charts Electronic ControlsLocation Service Electronic Controls Liquid Level Control Test ProcedureService H5X Thermostat Replace the electronic control board Service Limit Thermostat Test ProcedureLocation Limit thermostat is located on the tank lid Safety Overflow Wiring Service Safety Overflow SwitchIf voltage was present as described, proceed to #5 Service Solenoid Valve Late ModelsService Solenoid Valve Early Models Service Tank Heater Location Tank heater is located in the tank lidCheck for continuity across the tank heater termi- nals Thermistor Position Service Steam Sensor ThermistorLocation Dispense Valve is located behind control panel Service Dispense Valve PC OnlySingle Phase 230V AC 2 Wire + GND Wire + GND Schematic Wiring Diagram H5E/H5X Wire + GND Single Phase
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DV, H5E, H5X specifications

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