LG ATNH09GRLE2 Svc Manual page 76

6.7 Troubleshooting Outdoor Error
CH 21 (DC Peak / Comp IPM Fault)
Cause of
Trouble
Generation
of refrigerant Bending/Blocking of a pipe
flow distur- EEV fault Closing of SVC Valve
bance
Bending/Blocking of a pipe
Bending of a pipe
Check pipes
SVC Valve
Check
EEV Check
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Only for training and service purposes
Condition
Checking SVC Valve
Replacing a part of or
the entire pipes
SVC Valve Full Open
Replacing EEV
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Mechanism of Fault Generation
Freezing of indoor device
Reduced evaporation temperature due to
excessive expansion of refrigerant.
Weak heating and cooling
Insufficient flow of refrigerant
Frequent turning on/off of the compressor by
the high/low pressure protection logic
Accumulated refrigerant elevates the tem-
perature and reduces the pressure.
Wrong oil collection elevates the outlet tem-
perature of the compressor and damages the
compressor.
4. Trouble Shooting
OPEN
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