Bunn FMD-3 Manual De Usuario

34

FIG. 32 DISPENSE SOLENOID VALVE

TERMINALS

P1645

LEFT

CENTER

RIGHT

TAN to Main Harness
WHI to Main
Harness
ORN to Main
Harness
WHI to Main
Harness
WHI/VIO to Main
Harness
WHI to Main
Harness

FIG. 31 DISPENSE SOLENOID VALVES

P1637.40

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. With a voltmeter, check the voltage across the

white and white/violet, orange or tan wires. Con-
nect the dispenser to the power source. The indi-
cation 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.

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
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
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 white and white/violet,orange or tan

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 Fig. 32 when reconnecting the wires.

29170 080900