Bunn TU3Q - Manual (Page 25)

Page 25 10288 031604
SERVICE (cont.)
OFF/SELECTOR SWITCH (SWEETENER OPTION)
FIG. 20 OFF/SELECTOR SWITCH
P2845.40
Location:
The OFF/SELECTOR 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. With a voltmeter, check the voltage across the
black wire and white wire on the selector switch.
3. Connect the brewer to the power source. The in-
dication must be:
a) 120 volts ac for two wire 120 volt models.
b) 240 volts ac for two wire 240 volt models.
c) 100 volts ac for two wire 100 volt models.
4. Disconnect the brewer from the power source.
If voltage is present as described, proceed to #5.
If voltage is not present as described, refer to the
Wir-
ing Diagrams and check the wiring harness.
5. Disconnect the black and white wires from the
center terminals.
6. Disconnect the brown/white and white/violet wires
from the right side terminals.
7. Check for continuity across the center and right
terminals in rows one through four when the
switch is in the "SWEET” position.
If continuity is present as described, replace the wires
on the right side and proceed to #8.
If continuity is not present as described, replace the
switch.
8. Disconnect the white/violet wires on the left side
terminal.
9. Check for continuity across the center and left side
terminals in rows one through four when the
switch is in the "UNSWEET” 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. 21 when reconnecting the wires.
P1763
FIG.21 OFF/SELECTOR SWITCH TERMINALS
BLK to Power Cord
BRN/WHI to
Sweetener Sol
WHT/GRN to
Brew Sol
WHT/VIO
to Brew
Timer TL1
WHT to Power Cord
QU ICK BR EW