LG GR-K20SVZ Technical Manual page 11

Circuit Diagram
Press and hold the FOOD button and the STORAGE TEMPERATURE button
simultaneously. If everything is correct, all LEDs will turn on. If there is a failure, all
LEDs EXCEPT the Remaining Maturation Time LED will turn on.
Press TEST
SWITCH once
Press TEST
SWITCH at
TEST1 once
Press TEST
SWITCH at
TEST2 once
Press TEST
SWITCH at
TEST3 once
Press TEST
SWITCH at
TEST4 once
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