LG L1804R - Manual (Page 28)

28 Room Air Conditioner
Troubleshooting Guide
Possible Trouble 6 Remote controller does not operate.
Possible Trouble 7 It displays abnormally on DC PCB Ass’y.
NO
NO
NO
NO
YES
YES
YES
Is the IC01G good?
Is the connection of
CN-AC/DC OK?
• Replace the DC
PCB Ass'y.
• Replace IC01G.
• Replace IC03G
(Q01G, Q02G, Q03G
for Delux Model).
• Connect connector
to CN-AC/DC exactly.
Does the IC03G
(Q01G, Q02G, Q03G for Delux Model)
operate normally on DC
PCB Ass'y?
• Check the PCB pattern.
Is the voltage of Battery
over 2.3V?
• Replace Receiver Ass'y.
Is the connection of
CN-AC/DC OK?
Is the voltage No.10
of CN-AC/DC on DC PCB
Ass'y DC 5V?
• Replace the battery.
• Check the PCB pattern.
• Connect connector to
CN-AC/DC exactly.
NO
NO
NO
YES
YES
YES