LG LSC27990TT Service Manual page 28

EXPLANATION FOR MICOM CIRCUIT
1-8. Switch entry circuit
The following circuits are sensing signal form the damper motor reed switch for testing and diagnosing the refrigerator.
(1) GR-G277STSA(LSC27990TT)
1-9. Option designation circuit (model separation function)
(1) GR-G277STSA(LSC27990TT)
The circuits shown above vary according to which features are included on your particular model.
Separation Connection Status Application Standard
Connection OptiFresh exist
OP1
OUT OptiFresh don't exist
uThese circuits are preset at the factory and cannot be altered.
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