LG LS-J0762YL/NM/NN/NQ Service Manual page 59

When compressor does not oprate normally.
Trouble 7-2
Communication error between Indoor and Outdoor (Error Code
Does the operating LED in display PCB
Ass'y blink 5 times?
Is the voltage of BR/BK, RD AC220/240V in
Main PCB Ass'y.
Is the connection of CN-DATA between
indoor and outdoor unit right?
Replace the PCB Ass'y.
• Main PCB Ass'y (Indoor/Outdoor)
• Control Box Ass'y.
NO
YES
NO
YES
NO
YES
-59-
)
• Check the state of connecting cable
(3 line) bewteen indoor and outdoor unit .
• Check Fuse, Noise Filter, PTC, etc.
• Electrical wiring diagram(Colors)
• Check the connecting state
of connectors in outdoor PCB Ass'y
• Check the Fuse of outdoor PCB Ass'y.
• Reconnect the cable to terminal block.
• Check the PCB pattern(Resoldering).