LG ARUN038GS2 Installation Manual page 73

How to Cope with Test Run Abnormality
The phenomena from main component failure
Component Phenomenon
Not operating
Compressor
Stop during running
High pressure error
Outdoor
at cooling
fan
Heating failure, fre-
quent defrosting
No operating sound
at applying power
Outdoor
Heating failure,
EEV
Frozen outdoor heat
exchanger part
Low pressure error
or discharge temper-
ature error
When system fault occurs, the error code is displayed at indoor unit display or remote control display, the trou-
ble shooting guide is in the service manual
Cause
Motor insulation broken Check resistance between terminals and
chassis
Motor insulation failure Check resistance between terminals and
chassis
Motor failure, Check the outdoor fan operation after being
Bad ventilation around turned the outdoor units off for some time.
outdoor heat exchanger Remove obstacles around the outdoor units
Bad connector contact Check connector
Coil failure Check resistance between terminals
EEV clogged Service necessary
EEV clogged Service necessary
Check method and Trouble shooting
Installation Manual 73
Test Run