The Phenomena From Main Component Failure - LG Multi V ARWM072CAS5 Service Manual

1. The phenomena from main component failure

The phenomena from main component failure
Component
Not operating
Compressor
Stop during running
Abnormal noise during running
Heating failure
No operation sound after switching
Outdoor EEV ON the power supply
Low pressure error or discharge
temperature error
When system fault occurs, the error code is displayed on the indoor unit display or remote control display.
The trouble shooting guide is available in the service manual.
• When CH05/53/11 ERROR occurs, check if auto-addressing has done and communication wiring is ok.
Phenomenon
The phenomena from main component failure
Cause Check method and Trouble shooting
Check resistance between terminals and
Motor insulation broken
chassis
Strainer clogged Change strainer
Oil leakage Check Oil level after opening oil port
Check resistance between terminals and
Motor insulation failure
chassis
R-S-T misconnection Check compressor R-S-T connection
Bad connector contact Check resistance between terminals
Coil failure Service necessary
EEV clogged
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