Bunn FMDA DBC-3 Mode D'Emploi

38

FIG. 35 INLET SOLENOID VALVE

P1682.40

Location:

The inlet solenoid is located inside  on the left

rear of the dispenser housing.

Test Procedures:
1. Disconnect the dispenser  from the power source.
2. With a voltmeter check the voltage across the

white and violet wires at the inlet solenoid. Con-
nect the dispenser to the power source.  After a
delay of 10 seconds, 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.

3. Disconnect the dispenser from the power source,

If voltage is present as described, proceed to #4
If voltage is not present as described, refer to the
wiring diagram and check dispenser wiring harness.

4. Disconnect the white and violet wires from the

solenoid valve.

5. Check for continuity across the solenoid valve coil

terminals.

If continuity is present as described, reconnect the
white and violet 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. 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
blockage 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. Remove the white and blue wires from the sole-

noid valve.

2. Turn off the water supply to the dispenser.
3. Drain enough water from the tank (approximately

2.0 gallons) so the water level is below the dis-
pense valve mounting hole.

4. Disconnect the water line from the solenoid valve.
5. Loosen the #10-32 screw securing the solenoid

valve to side of the tank. Twist the solenoid valve
clockwise and 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. 34 when reconnecting the wires.

BLU to Aux. Control Board

WHI to Aux. Control Board

P1995.50

FIG. 34 HOT WATER DISPENSE

SOLENOID VALVE WIRING

29215 052104