Hot/Cold Switch - Bunn FMD-3 Operating & Service Manual

SERVICE (cont.)
HOT/COLD SWITCH (Optional)
FIG. 18 HOT/COLD SWITCH
Location:
The hot/cold switch is located on the left side of
the whipper motor mounting panel.
Test Procedure:
1. Disconnect the dispenser from the power source.
2. Disconnect the four pin plug from the hot/cold
switch and the four pin connector on the main
wiring harness.
3. Press the left dispense switch on the door and, with
a voltmeter, check the voltage across the white wire
(pin 4) and red wire (pin 2) in the four pin connector
on the main wiring harness. Connect the dispenser
to the power source. The indication must be:
a) 120 volts ac for two wire 120 volt models, and
three wire 120/208 volt and 120/240 volt models.
b) 240 volts ac for two wire 240 volt models.
c) 230 volts ac for two wire 230 volt models.
4. Disconnect the dispenser from the power source.
If voltage is present as described, reconnect the four
pin plugs and proceed to #5.
If voltage is not present as described, refer to the Wiring
Diagrams and check the main wiring harness.
5. Disconnect the wires from the switch terminals.
6. With the switch in the "Cold" (upper) position check
for continuity between the center terminal and the
bottom terminal. With the switch in the "Hot"
(lower) position check for continuity between the
center terminal and the upper terminal.
If continuity is present as described, the hot/cold switch
is operating properly.
If continuity is not present as described, replace the
switch.
Removal and Replacement:
1. Remove all wires from the switch terminals.
P1642.40 2. Remove the mounting nut on the front of the whip-
per motor mounting panel.
3. Remove the hot/cold switch from the rear of the
front panel and discard.
4. Reconnect the wires to the terminals on the rear of
the new switch.
5. Push new hot/cold switch through the hole on the
left side of the whipper motor mounting panel and
secure with mounting nut.
6. Refer to Fig. 19 when reconnecting the wires.
TAN to Main Harness
RED to Main Harness
WHI/YEL to Cold
Solenoid
FIG. 19 HOT/COLD SWITCH TERMINALS
27
P1208
29170 090407