WARNING
These procedures require the machine to be
connected to the power supply. The voltages of
the electronic circuit are very low, but HIGHER
VOLTAGES ARE PRESENT IN THE UNIT. Do not
touch anything but the tester while the unit is being
checked out. Make all connections to the circuit
board with the ELECTRICAL POWER OFF.
INSTRUCTIONS FOR USING TESTER,
model
FC1 (Optional, order part no. A33942-001)
(These instructions assume that the unit will not
run, and prior investigation of electric power,
controls, and mechanical parts indicates that the
electronic circuit may be at fault.)
If the "NO WATER" indicator is lit, but inspection
shows that the water level in the reservoir is above
the top of the water level sensor, OR the "BIN
EMPTY" indicator is off while inspection shows that
the ice level sensors are properly aligned, clean
and not obstructed, use the tester as follows:
Bin Control
Note: All testing is done with the
electrical power on, the master switch on, and
all reset switches “reset”.
1. Unplug “photo trans” and “LED” connectors from
the circuit board.
2. Plug “photo trans” and “LED” connectors from
the tester into the circuit board.
a. Move the “bin full” switch on the tester to Full.
The light on the tester should be ON.
If the light on the tester is not on, the circuit board
should be replaced.
PHOTO TRANS
LED
SWITCH TO
“FULL”
LIGHT
GOES ON
LIGHT GOES ON
SWITCH TO
“BIN EMPTY”
LIGHT OFF
CIRCUIT BOARD TESTING
NM1852R
December 1992
Page 35
