On/Off Switch - Bunn CWA-APS Operating & Service Manual

SERVICE (cont.)

ON/OFF SWITCH

FIG. 6 ON/OFF SWITCH
Location:
The ON/OFF switch is located left of center on the
front of the hood.
Test Procedure:
1. Disconnect the brewer from the power source.
2. Viewing the switch from the back remove the red
wire from the upper terminal and the black wire
from the center terminal.
3. With a voltmeter, check the voltage across the red
wire and the black wire. Connect the brewer to the
power source. The indication must be 240 volts ac.
4. Disconnect the brewer from the power source.
If voltage is present as described, reconnect the red
wire and proceed to #5.
If voltage is not present as described, refer to the
Wiring Diagram and check the brewer wiring harness.
5. With the black wire removed, remove the white/
red wire from the lower terminal.
6. Check for continuity across the center and lower
terminal with the switch in the "ON" (upper) posi-
tion. Continuity must not be present when the
switch is in the "OFF" (lower) position.
If continuity is present as described, reconnect the
black wire to the center terminal and the white/red to
the lower terminal.
If continuity is not present as described, replace the
switch.
Removal and Replacement:
1. Remove the wires from switch terminals.
2. Compress the clips inside the hood and gently
push switch through opening.
3. Push new switch into opening until clips hold
switch in the hood. (#3 terminal to the top)
4. Refer to Fig. 7 when reconnecting the wires. Red
wire must be connected to #3 terminal, black wire
to terminal #2 and white/red wire to terminal #1.
P1467.40
FIG. 7 ON/OFF SWITCH TERMINALS
Page 16
#3
RED to Terminal Block
(Red Insert)
#2
BLK to Terminal Block
(Black Insert)
#1
WHI/RED to Timer TL1
P1131
10690.1 063000