CIRCUIT BOARD TESTING
INSTRUCTIONS FOR USING TESTER, (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.
b. If the light on the tester IS on, move the “bin
full” switch to Bin Empty. The light on the tester
should go OFF, and the Bin Empty light on the
circuit board should go ON.
If the Bin Empty light is ON, wait 10-20 seconds for
the machine to start, if the machine starts, replace
the ice level sensors.
If the Bin Empty light does not come ON, the
circuit board should be replaced.
LED
PHOTO
TRANS
SWITCH TO
“FULL”
LIGHT GOES
ON
LIGHT GOES ON
LIGHT OFF
SWITCH TO
“BIN EMPTY”
Electrical Shock Hazard.
Disconnect electrical
power to the icemaker -
dispenser before
beginning.
NDE750
December 1993
Page 31
