Bunn FMD-3 service manual Solenoid Valves Dispense, SERVICE cont

SERVICE (cont.)

SOLENOID VALVE (COLD WATER - OPTIONAL) (cont.)

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

9.Refer to Fig. 27 when reconnecting the wires.

WHI/YEL to Hot/

Cold Switch

WHI to Main Wiring

Harness

P1215

FIG. 27 COLD WATER SOLENOID TERMINALS

SOLENOID VALVES (DISPENSE)

P1445.40

FIG. 28 DISPENSE SOLENOID VALVES

Location:

The dispense solenoids are located on the upper left side of the tank.

Test Procedures:

1.Disconnect the dispenser from the power source.

2.Disconnect the white and white/violet, orange or tan wires from the solenoid valve. With the “RUN/ RINSE” switch in the "RINSE" upper position press the appropriate dispense switch on front of the door.

3.Check the voltage across the white and white/ violet, orange or tan wires with a voltmeter. Connect the dispenser to the power source. The indication must be 120 volts ac for two wire 120 volt models, three wire 120/208, 120/240 volt models and 240 volts ac for two wire 240 volt models.

4.Disconnect the dispenser from the power source,

If voltage is present as described, proceed to #5

If voltage is not present as described, refer to wiring diagram and check dispenser wiring harness.

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

If continuity is present as described, reconnect the white and white/violet, orange or tan wires to the so- lenoid.

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

6.Check the solenoid valve for coil action. Connect the dispenser to the power source. With "RUN/ RINSE" switch in the "RINSE" upper position press the appropriate dispense switch and listen care- fully in the vicinity of the solenoid valve for a "click- ing" sound as the coil magnet attracts.

7.Disconnect the dispenser from the power source.

If the sound is heard as described and water will not pass through the solenoid valve, there may be a block- age in the tank water outlet before the solenoid valve or, the solenoid valve may require inspection for wear, and removal of waterborne particles.

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

Removal and Replacement:

1.Remove the white and white/violet,orange or tan wires from the solenoid valve.

2.Turn-off the water supply to the dispenser.

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