Bunn TU5Q - Manual (Page 20)

Page 20
SERVICE (cont.)
ON/OFF SWITCH
FIG. 16 ON/OFF SWITCH
P2131.40
Location:
The ON/OFF switch is located in the front of the hood,
above and to the left of the brew funnel.
Test Procedure:
1. Disconnect the brewer from the power source.
2. Remove the black and white/violet wires from the
switch terminals.
3. With a voltmeter, check the voltage across the
black wire removed from the ON/OFF switch and
the white wire on the switch terminal.
4. Connect the brewer to the power source.The indi-
cation must be:
a) 120 volts ac for 2-wire 120 volt models.
b) 120 volts ac for 3-wire 120/208 and 120/240
volt models.
5. Disconnect the brewer from the power source.
If voltage is present as described, proceed to #6.
If voltage is not present as described, refer to the Wir-
ing Diagrams and check the wiring harness.
6. Check for continuity across the center and end
terminals of the bottom row when the switch is in
the “ON” position.
If continuity is present as described, replace the wires,
the switch is operating properly.
If continuity is not present as described, replace the
switch.
Removal and Replacement:
1. Remove the wires from the switch terminals.
2. Compress the clips inside the hood and gently
push the switch through the opening.
3. Push the new switch into the opening and spread
the clips to hold the switch captive in the hood.
4. Refer to FIG. 17 when reconnecting the wires.
P1590
FIG.17 ON/OFF SWITCH TERMINALS
10777 041500
BLK to Terminal
Block
WHI/VIO to
Dilution Switch
WHI/VIO to
Timer Board TL1
WHI to Timer
Board TL2