Solenoid (Inlet) - Bunn FMD-3 Operating & Service Manual

SERVICE (cont.)
SOLENOID VALVE (INLET)
FIG. 33 INLET SOLENOID VALVE
Location:
The inlet solenoid is located inside on the left rear
of the dispenser housing.
Test Procedures:
1. Disconnect the dispenser
source.
2. Disconnect the white and violet wires from the
solenoid valve.
3. With a voltmeter, check the voltage across the white
and violet 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 the 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 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
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 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 violet wires from the sole-
P1445.40
2. Turn off the water supply to the dispenser.
3. Disconnect the water lines to and from the solenoid
4. Loosen the two #8-32 screws securing the solenoid
5. Remove the two #8-32 U-Type fasteners from the
from the power
6. Install the two #8-32 U-Type fasteners and the two
7. Install new solenoid valve on rear of dispenser
8. Securely fasten the water lines to and from the
9. Refer to Fig. 34 when reconnecting the wires.
36
the dispenser to the power source. Listen carefully
in the vicinity of the solenoid valve for a "clicking"
sound as the coil magnet attracts.
noid valve.
valve.
to the rear dispenser housing. Remove solenoid.
solenoid bracket.
#8-32 screws on the new solenoid.
housing and tighten the two screws.
solenoid valve.
WHI to Main
Harness
VIO to Control
Board J4-2
FIG. 34 INLET SOLENOID VALVE TERMINALS
P1217
29170 090407