Bunn FMD-1 - Manual (Page 20)

20
SERVICE (cont.)
HOPPER DELAY BOARD
FIG. 14 HOPPER DELAY BOARD
Location
The hopper delay board is located behind the
lower front access panel mounted in the center of the
component bracket.
Test Procedures:
1. Disconnect the dispenser from the power source.
2. Disconnect the eight pin plug on the main wiring
harness from the eight pin connector on the hop-
per delay board.
3. With the rinse/run switch in the “Run”, lower
position, check the voltage across the white wire
(#8 terminal) and black wire (#4 terminal) of the
main wiring harness with a voltmeter. Connect the
dispenser to the power source. The indication
must be:
a) 120 volts ac for two wire 120 volt models.
b) 120 volts ac for three wire 120/208 volt or 120/
240 volt models.
4. Disconnect the dispenser 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 diagram and check the dispenser wiring harness.
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5. Reconnect the eight pin connector of the main
wiring harness to the hopper delay board.
6. Check the voltage across the terminals on the
auger motor with a voltmeter. Press and hold the
dispense switch. Connect the dispenser to the
power source. After a delay of .7 seconds the
indication must be:
a) 120 volts ac for two wire 120 volt models.
b) 120 volts ac for three wire 120/208 volt or 120/
240 volt models.
7. Disconnect the dispenser from the power source.
If voltage is present as described the hopper delay
board is operating properly.
If voltage is not present as described, replace the hop-
per delay board.
Removal and Replacement:
1.
Disconnect the eight pin plug from the hopper
delay board.
2. Remove the two #8-32 keps nuts securing the
hopper delay board to the component bracket.
3. Remove hopper delay board and discard.
4. Install new hopper delay board on the compo-
nent bracket using two #8-32 keps nuts.
5. Reconnect the eight pin connector to the hopper
delay board.
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