Bunn FMD-3 用户手册

22

P1449

FIG. 12 DISPENSE SWITCH TERMINALS

LEFT

CENTER

RIGHT

BLK
RED/BLK

BLK
RED/WHI

BLK
RED

ORN

BLU/WHI

ORN

BLK/WHI

ORN

BLU/BLK

P1631

Location:

The dispense switches are located on the lower

outside of the dispenser door.

Test Procedure:
1. Disconnect the dispenser from the power source.
2. Open the dispenser door and remove the bottom

door cover.

3. Disconnect the wires from the door interconnect

wiring harness to the dispense switch to be tested.

4. Check for voltage across the black and red/black

wires for the right dispense switch, black and red/
white wires for the center dispense switch or the
black and red wires for the left dispense switch
from the door interconnect wiring harness. Con-
nect the dispenser to the power supply. The indi-
cation must be:
a) 120 volts ac for two wire 120 volt models, 120/
208 volt and 120/240 volt models.
b) 240 volts ac for two wire 240 volt models.

5. Disconnect the dispenser from the power source.

If voltage is present as described, proceed to #6.
If voltage is not present as described, refer to the
Wiring Diagrams and check the dispenser wiring har-
ness.

6. With a voltmeter, check the voltage across the

blue/black (+) and orange (-) wires for the right
dispense switch, black/white (+) and orange (-)
wires for the center dispense switch, or blue/white
(+) and orange (-) for the left dispense switch from
the door interconnect wiring harness. Connect the
dispenser to the power source. The indication
must be +5 volts dc.

If voltage is present as described, proceed to #7.
If voltage is not present as described, refer to the
Wiring Diagrams and check the dispenser wiring har-
ness.
7. Check for continuity across the terminals (top

right to top left; bottom right to bottom left) of the
dispense switch with the switch in the “ON” posi-
tion. Continuity must not be present when the
switch is in the “OFF” (released) position.

If continuity is present as described, reconnect the
connector to the door interconnect wiring harness,
the switch is operating properly.
If continuity is not present as described, replace the
switch.

Removal and Replacement:
1. Open the dispenser door.
2. Remove the five #6-32 screws securing the bot-

tom door cover and remove cover.

3. Disconnect the wires on the dispense switch to

be removed from the door interconnect wiring
harness.

4. Compress the clips inside the door on the dis-

pense switch and gently push the switch through
the opening.

5. Push new switch into the opening and spread the

clips to hold the switch in the door.

6. Reconnect the wires to the dispense switch from

door interconnect wiring harness.

7. Reinstall the door bottom cover using five #6-32

screws.

8. Refer to Fig. 12 when reinstalling wires.

FIG.11 DISPENSE SWITCH

29170  080900