SERVICE (cont.)

SOLENOID VALVES (DISPENSE) (all Models)

FMD DBC-3 shown

FIG. 44 DISPENSE SOLENOID VALVES P1637.40 Location:

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

Test Procedures:

1.Disconnect the dispenser from the power source.

2.Disconnect the two wires from the solenoid valve. With the “RUN/RINSE” switch in the “RINSE” (up- per) position press the appropriate dispense switch on front of the door.

3.With a voltmeter, check the voltage across the two wires. Connect the dispenser to the power source. The indication must be:

a)120 volts ac for two wire 120 volt models, three wire 120/208 volt, and 120/240 volt models.

b)240 volts ac for two wire 240 volt models.

c)230 volts ac for two wire 230 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 Diagrams and check dispenser wiring harness.

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

If continuity is present as described, reconnect the two wires to the solenoid.

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 carefully in the vicinity of the solenoid valve for a “clicking” 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 two wires from the solenoid valve.

2.Turn off the water supply to the dispenser.

3.Drain enough water from the tank (approximately 1.0 gallon) so the water level is below the dispense valve mounting hole.

4.Disconnect the water line from the solenoid valve.

5.Remove the #10-32 screw securing the solenoid valve to side of the tank. Remove solenoid valve.

6.Using the #10-32 screw install new solenoid valve on side of the tank

7.Push the water line onto the tube on bottom of solenoid valve.

8.Refer to schematic wiring diagrams when recon- necting the wires.

to Dispense Switch

to Control Board

FIG. 45 DISPENSE SOLENOID VALVE

P1645

 

TERMINALS

 

 

47

 

42672 122209

 

 

Page 47
Image 47
Bunn FMD-4, FMD-5 manual Solenoid Valves Dispense all Models, Dispense Solenoid Valves P1637.40 Location

FMD-4, FMD-5 specifications

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