Bunn FMD-5 - Manual (Page 37)

37
J4
J1 J2
J3
J4
J1 J2
J3
P2641
FIG. 34 INLET SOLENOID VALVE TERMINALS
SERVICE (cont.)
WHI from Main Harness
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 violet wires from the sole-
noid valve.
2. Turn-off the water supply to the dispenser.
3. Disconnect the water lines to and from the sole-
noid valve.
4. Remove the two #8-32 screws securing the sole-
noid to the rear of the dispenser housing. Remove
solenoid.
5. Remove the two #8-32 U-Type fasteners from the
solenoid bracket.
6. Install the two #8-32 U-Type fasteners and the two
#8-32 screws on the new solenoid.
7. Install new solenoid on rear of dispenser housing
and tighten the two screws
8. Securely fasten the water lines to and from the
solenoid valve.
9. Refer to Fig. 34 and reconnect the wires.
VIO from Main Harness
SOLENOID VALVE (INLET)
FIG. 33 INLET SOLENOID VALVE
Location:
The inlet solenoid is located on the lower left side
near the rear panel.
Test Procedures:
1. Disconnect the dispenser from the power source.
2. Disconnect the white and violet wires from the
solenoid valve.
3. Check the voltage across the white and violet wires
with a voltmeter. Connect the dispenser to the
power source. The indication must be 120 volts ac
for two wire 120 volt models, three wire 120/208
and 120/240 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 the
wiring diagram 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.
P2635
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.
35135 012103