LG LBNG3061YL Service Manual page 38

When compressor does not operate normally.
Trouble 5-1
n Communication error between Indoor and Outdoor (Error Code ⑤ )
Is the LCD of wired remote controller
shows 'CH05'?
Is the connecting state of connector
outdoor PCB Ass'y right?
Is the connection of CN-DATA between
indoor and outdoor unit right?
Replace the PCB Ass'y.
• Main PCB Ass'y (Indoor/Outdoor)
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Only for training and service purposes
NO
YES
NO
YES
NO
YES
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• Check the state of connecting cable
(4 line) bewteen indoor and outdoor unit .
• Electrical wiring diagram(Colors)
• Check the connecting state
of connectors in outdoor PCB Ass'y
(CN_Data - Terminal Block.)
• Reconnect the cable to terminal block.
• Check the PCB pattern(Resoldering).
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