Bunn TU3QF-EZ User Guide
Page 19
SERVICE (cont.)
HOT WATER SOLENOID VALVE (for faucet)
33030 030101
WHI/VIO to Relay
WHI to Power Cord
P2156.50
FIG. 9 HOT WATER VALVE TERMINALS
FIG. 8 HOT WATER SOLENOID VALVE
Location:
The hot water solenoid valve for the faucet is lo-
cated inside the hood. It is located in front of the
tank, on the left side.
tank, on the left side.
Test Procedures:
NOTE: Remove the white/blue wire from the cold wa-
ter solenoid valve before testing the hot water valve.
1. Disconnect the brewer from the power source.
2. Check the water level in the tank to confirm that it
NOTE: Remove the white/blue wire from the cold wa-
ter solenoid valve before testing the hot water valve.
1. Disconnect the brewer from the power source.
2. Check the water level in the tank to confirm that it
is within 1/2" from the top of the tank.
3. Connect the brewer to the power source.
4. Check the dispense valve for coil action. Place the
4. Check the dispense valve for coil action. Place the
ON/OFF switch in the "ON" position, press and hold
the faucet switch in the Black Tea position. Listen
carefully in the vicinity of the hot water dispense
valve for a "clicking" sound as the coil magnet
attracts and repels the plunger.
the faucet switch in the Black Tea position. Listen
carefully in the vicinity of the hot water dispense
valve for a "clicking" sound as the coil magnet
attracts and repels the plunger.
5. Disconnect the brewer from the power source.
If the sound is heard as described, there may be a
blockage in the dispense valve or the water line to the
sprayhead. Remove the dispense valve and inspect for
wear, and remove waterborne particles.
If the sound is not heard as described, proceed to #6.
blockage in the dispense valve or the water line to the
sprayhead. Remove the dispense valve and inspect for
wear, and remove waterborne particles.
If the sound is not heard as described, proceed to #6.
P2158.40
6. Connect the voltmeter lead ends to the hot water
dispense valve coil terminals. Connect the brewer
to the power source. Place "ON/OFF" Switch in the
"ON" position. Press and hold the Black Tea faucet
switch. The indication must be 120 volts ac .
to the power source. Place "ON/OFF" Switch in the
"ON" position. Press and hold the Black Tea faucet
switch. The indication must be 120 volts ac .
7. Disconnect the brewer from the power source.
If voltage is present as described, but no coil action is
observed, nor "clicking" heard, dispense valve is de-
fective. Replace valve and test again to verify repair.
If voltage is not present as described, refer to
observed, nor "clicking" heard, dispense valve is de-
fective. Replace valve and test again to verify repair.
If voltage is not present as described, refer to
Wiring
Diagrams and check the brewer wiring harness. Also
check the control board for proper operation. See
Page 25.
check the control board for proper operation. See
Page 25.
Removal and Replacement
1. Remove all wires from solenoid valve.
2. Turn off the water supply to the brewer.
3. Disconnect the water lines to and from the sole-
1. Remove all wires from solenoid valve.
2. Turn off the water supply to the brewer.
3. Disconnect the water lines to and from the sole-
noid valve.
4. Remove the two #8-32 nuts holding the solenoid
valve to the hood.
5. Securely install the new solenoid valve to the hood.
6. Securely fasten the water lines to and from the
6. Securely fasten the water lines to and from the
solenoid valves.
7. Refer to Fig. 9 when reconnecting the wires.
8. Refer to Fig. 5 when reconnecting the white/blue
8. Refer to Fig. 5 when reconnecting the white/blue
wire to the cold water valve.