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8) CB "GM" and "COMP" LEDs are on. Use an object to cover BC1 lens at the bottom of
the icemaker. If the bottom of the icemaker is not accessible in your application, remove
the thumbscrew securing BC1 housing, remove the housing from the base, then cover
BC1 lens. See Fig. 4. The yellow LED on BC1 turns on (ashing or steady). The yellow
LED ashes when ice is at the outer limit of its range and turns steady as ice nears.
After the yellow LED turns on (ashing or steady), BC1 shutdown delay timer starts.
See "III.B.2. BC1 (Infrared Sensor) Shutdown Delay (S1 dip switch 1, 2, 3)." Comp
(LLV/SLV on MLH model) should de-energize immediately after the shutdown delay
timer terminates. 5 min. later, GM and FM/FMR should de-energize.
Diagnosis: If BC1 yellow LED is not on after covering the lens, replace BC1. If the
appliance remains on after BC1 shutdown delay timer terminates and the 5-min. ice
purge timer terminates, replace CB. If BC1 fails to shut down the icemaker and the level
of ice activates BC2, the icemaker shuts down and a 9-beep alarm sounds. To reset,
move the power switch to the "OFF" position, and then back to the "ON" position.
9) Remove the object covering the lens. If you removed BC1 housing from the base,
replace it in its correct position, and secure it with the thumbscrew.
10) Move the power switch to the "OFF" position. Turn off the power supply, then proceed
to "II.D.2. Bin Control 2 (mechanical stand-alone or backup) Check."
Legend: BC1–bin control 1 (infrared sensor); BC2–bin control 2 (mechanical stand-alone
or backup); CB–control board; Comp–compressor; FM–fan motor; FMR–fan
motor-remote; GM–gear motor; LLV–liquid line valve;
SLV –suction line valve
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