Bunn FMD-1 - Manual (Page 26)

26
SOLENOID VALVE (DISPENSE)
FIG. 24 DISPENSE SOLENOID VALVE
Location:
The dispense solenoid is located on the upper
left center of the tank.
Test Procedures:
1.
Disconnect the dispenser from the power source.
2. Disconnect the white and white/red wires from
the solenoid valve. With the “RUN/RINSE” switch
in the "RINSE" upper position press the dispense
switch on front of the door.
3. Check the voltage across the white and white/red
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 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 white/red 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. With "RUN/
RINSE" switch in the "RINSE" upper position press
the 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 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/red wire from the
solenoid valve.
2. Turn-off the water supply to the dispenser.
3. Drain enough water from the tank so the water
level is below the dispense valve mounting hole.
NOTE: Bunn-O-Matic has a syphon assembly,
#12440.0000. available for this purpose.
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.
P1505
SERVICE (cont.)
FIG. 23 RINSE/RUN SWITCH TERMINALS
P1456
BLK to Main
Wiring Harness
BLK from
Hopper Delay
Board #4
RUN/RINSE SWITCH (cont.)