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


 
Service Manual 75
Does the Operating LED of indoor unit blink
when Operation's ON?
Is the Connection between indoor power
relay Pin and terminal block No. 1 right?
Refer to the self-diagnosis function.
The Outdoor Unit does not operate at all.
Trouble 7
YES
Check the connecting state of connector
NO
NO
Is the connection of cable between indoor
and outdoor unit right?
Indoor Outdoor
1(Brown) 1(Brown)
2(Blue) 2(Blue)
3(Green/YL) 3(Green/YL)
4(Red) 4(Red)
NO
YES
Is the voltage of Terminal Block , in
outdoor Control Box about AC220V /
240V?
Check the Fuse of Outdoor PCB Ass'y.
NO
YES
Is the voltage of NF01J , in outdoor
PCB Ass'y about AC220V / 240V when
Operation's ON?
Check the PTC and RY-PWR.
NO
YES
Is the Bridge Diode(BD01S) right?
Check the Bring Diode.
NO
YES
Replace the PCB Ass'y.
NO
Troubleshooting Guide