Bunn FMD-5 - Manual (Page 34)

34
J4
J1 J2
J3
J4
J1 J2
J3
SOLENOID VALVE (COLD WATER - OPTIONAL)
FIG. 29 COLD WATER SOLENOID VALVE
P2635
Location:
The cold water solenoid valve is located on the
left side of the dispenser base just behind the compo-
nent bracket.
Test Procedures:
1. Disconnect the dispenser from the power source.
2. Disconnect the white and white/yellow wires from
the solenoid valve. With the “HOT/COLD” switch in
the "COLD" (upper) position press the left dis-
pense switch on front of the door.
3. With a voltmeter, check the voltage across the
white and white/yellow wires. Connect the dis-
penser 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.
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/yellow 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 "HOT/
COLD" switch in the "COLD" (upper) position press
the left 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 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. Loosen the two screws securing the component
bracket to the dispenser base. Lift the component
bracket off of the base and move to the right.
2. Remove the white and white/yellow wires from
the solenoid valve.
3. Turn off the water supply to the dispenser.
4. Disconnect the water lines to and from the sole-
noid valve.
5. Loosen the two #8-32 screws and washers se-
curing the solenoid mounting bracket to the base.
Remove solenoid bracket and solenoid valve as
an assembly.
6. Remove the two #10-32 screws and lockwashers
securing the solenoid valve to the solenoid bracket.
7. Using two #10-32 screws and lockwashers install
new solenoid valve on solenoid mounting bracket.
8. Install the solenoid valve and bracket on the dis-
penser base and tighten the two #8-32 screws.
9. Securely fasten the water lines to and from the
solenoid valve.
10. Refer to Fig. 30 when reconnecting the wires.
SERVICE (cont.)
P1215
WHI/YEL to Hot/
Cold Switch
WHI to Main Wiring
Harness
FIG. 30 COLD WATER SOLENOID TERMINALS
35135 012103