TESTING ELECTRONIC CIRCUIT
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.)
Make all connections to the circuit board with
the ELECTRICAL POWER OFF.
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.
PHOTO TRANS
LED
LIGHT GOES
ON
SWITCH TO
“FULL”
LIGHT GOES ON
LIGHT GOES
OFF
SWITCH TO
“BIN EMPTY”
Electrical Shock Hazard.
Disconnect electrical
power to the icemaker -
dispenser before
connecting tester.
NDE550 & NDE650
April 1997
Page 34
