The Phenomena From Main Component Failure - LG R410A Service Manual

1. The phenomena from main component failure

The phenomena from main component failure
Component Phenomenon
Not operating
Stop during running
Compressor
Loud noise during
running
High pressure error
Outdoor
at cooling
fan
Heating failure, fre-
quent defrosting
No operating sound
at applying power
Outdoor
Heating failure,
LEV
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
The phenomena from main component failure
Cause
Motor insulation broken
Motor insulation failure
Phase sequence fault
Motor failure,
bad ventilation around
outdoor heat exchanger
Bad connector contact
Coil failure
LEV clogged
LEV clogged
Check method and Trouble shooting
Check resistance between terminals and
chassis
Check resistance between terminals and
chassis
Check wiring(R, S, T) sequence, or inter
change last two phase connection.
Check the outdoor fan operation after being
turned the outdoor units off for some time.
Remove obstacles around the outdoor units
Check connector
Check resistance between terminals
Service necessary
Service necessary
Service Manual 115