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.)
Bin Control
Note: Testing is done with the
electrical power on, the master switch on, and all
the 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
SWITCH TO
“FULL”
LIGHT
GOES ON
LIGHT GOES ON
SWITCH TO
“BIN EMPTY”
LIGHT OFF
Moving Parts Hazard.
Disconnect electrical
power before
beginning.
NME950R & FME1200R
December 1995
Page 35
