Service manual

5-9
TROUBLESHOOTING CHART B
2002 Optics Design
TEST RESULT POSSIBLE CAUSE CORRECTIVE ACTION
2 LED pulses, repeated.
Ice maker slide control turned OFF (closed). Move ice maker slide control to ON (open).
Dirt on optics. Clean dirt from optics.
Frost on optics lenses. Clean frost from lenses.
Flapper door is open and is blocking the
emitter beam.
Hold the emitter door closed, and the status LED should be
on steady.
Failed optics. Replace emitter and receiver boards and retest.
No LED pulses. Ice maker is in 5 minute
“harvest” cycle.
To verify, press in on door switch. Status LED should flash
at 1 second intervals.
Incorrect wiring at emitter or receiver board. Correct wiring and retest.
Optics performing self-tests (will not
perform diagnostic tests during this time).
Make sure ice maker is
“parked.” Unplug refrigerator for
5 seconds to reset optics control and retest.
LED is defective. Replace emitter and receiver boards and retest.
5 second LED on steady. Flapper door is held closed. Normal with flapper door closed.
Optics Diagnostic Mode
(optics test only)