SERVICE (cont.)

SOLENOID VALVE (COLD WATER - OPTIONAL for FMD-2,-3,-4,-5)

FMD DBC-3 shown

P4102.40

FIG. 42 COLD WATER SOLENOID VALVE Location:

The cold water solenoid valve is located on the left side of the dispenser base just behind the component bracket.

Test Procedures:

1.Disconnect the dispenser from the power source.

2.With the “HOT/COLD” switch in the “COLD” (upper) position press any left dispense switch on front of the door.

3.With a voltmeter check the voltage across the white and white/yellow wires at the solenoid terminals. Connect the dispenser to the power source. The indication must be:

a)120 volts ac for two wire 120 volt models

b)120 volts ac for three wire 120/208 or 120/240 volt models

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

d)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 diagram and check dispenser wiring harness.

5.Disconnect the white and white/yellow wires from the solenoid.

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

If continuity is present as described, reconnect the white and white/yellow wires to the solenoid.

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

7.Check the solenoid valve for coil action. Connect the dispenser to the power source. With “HOT/COLD” switch in the “COLD” (upper) position press the left dispense switch and listen carefully in the vicinity of the solenoid valve for a “clicking” sound as the coil magnet attracts.

8.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 water line 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.Loosen the two screws securing the component bracket to the dispenser base. Lift the component bracket off of the base and move to the right.

2.Remove the white and white/yellow wires from the solenoid valve.

3.Turn off the water supply to the dispenser.

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

5.Loosen the two #8-32 screws and washers secur- ing the solenoid mounting bracket to the base. Remove solenoid bracket and solenoid valve as an assembly.

6.Remove the two #10-32 screws and lockwash- ers securing the solenoid valve to the solenoid bracket.

7.Using two #10-32 screws and lockwashers install new solenoid valve on solenoid mounting brack- et.

8.Install the solenoid valve and bracket on the dis- penser base and tighten the two #8-32 screws.

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

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

P1215

FIG. 43 COLD WATER SOLENOID TERMINALS

46

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Bunn FMD-5, FMD-4 manual Solenoid Valve Cold Water Optional for FMD-2,-3,-4,-5, Cold Water Solenoid Terminals

FMD-4, FMD-5 specifications

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