The phenomena from main component failure
Compressor
Outdoor
fan
Outdoor
LEV
Not operating
Stop during running
Loud noise during
running
High pressure error
at cooling
Heating failure, fre-
quent defrosting
No operating sound
at applying power
Heating failure,
Frozen outdoor heat
exchanger part
Low pressure error
or discharge temper-
ature error
Motor insulation broken
Strainer locking
Oil shortage
Motor insulation failure
Phase sequence fault
Motor failure,
Bad ventilation around
outdoor heat exchanger
Bad connector contact
Coil failure
LEV clogged
LEV clogged
Check resistance between terminals and
chassis
Service necessary
Open drain cock and check oil
Check resistance between terminals and
chassis
Check wiring(R, S, T) sequence, or lnter
change last two phase connection.
Check the outdoor fan operation after being
turned the outdoor unit off for sme time.
Remove obstacles around the outdoor unit
Check connector
Check resistance between terminals
Service necessary
Service necessary
Component Phenomenon Cause Check method and Trouble shooting
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
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