LG AS-W1863 Series Svc Manual page 74

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