LG Electronics AS-W126URH0/UBH0/UWH0/UMH0/UCH0 Air Conditioner User Manual


 
Service Manual 77
When compressor does not oprate normally.
Communication error between Indoor and Outdoor (Error Code )
Trouble 8-2
Does the operating LED in display PCB
Ass'y blink 5 times?
Check the state of connecting cable
(3 line) bewteen indoor and outdoor unit .
Check Fuse, Noise Filter, PTC, etc.
NO
YES
Is the voltage of BR/BK, RD AC220/240V in
Main PCB Ass'y.
Electrical wiring diagram(Colors)
Check the connecting state
of connectors in outdoor PCB Ass'y
Check the Fuse of outdoor PCB Ass'y.
NO
YES
Is the connection of CN-T/Block and in
CN-AC/DC indoor P.C.B Ass'y is right?
Replace the PCB Ass'y.
Main PCB Ass'y (Indoor/Outdoor)
Control Box Ass'y.
Reconnect the connectors.
Check the PCB pattern(Resoldering).
NO
YES
Troubleshooting Guide