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TROUBLE SHOOTING CHART for OPTICS DIAGNOSTIC CHART
TEST
Optics Diagnostic
Mode (optics test
only)
RESULT
2 LED pulses,
repeated.
No LED pulses.
5 second LED on
steady.
POSSIBLE CAUSE
Dirt on optics.
Frost on optics
lenses.
Flapper door is open
and is blocking the
emitter beam.
Failed optics.
Ice maker is in 5
minutes "harvest"
cycle.
Incorrect wiring at
emitter or receiver
board.
Optics performing
self-tests (will not
perform diagnostic
tests during this time).
LED is defective.
Flapper door is held
closed.
CORRECTIVE
ACTION
Clean dirt from optics.
Clean frost from
lenses.
Hold the emitter door
closed, and the status
LED should be on
steady.
Replace emitter and
receiver boards and
retest.
To verify, press in on
door switch. Status
LED should flash at 1
second intervals.
Correct wiring and
retest.
Make sure ice maker
is "parked." Switch
OFF the Ice-Maker by
means the User
Board for 5 seconds
to reset optics control
and retest.
Replace emitter and
receiver boards and
retest.
Normal with flapper
door closed.
32
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