Part 4 Trouble Shooting
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Cause of
Trouble
Condition Mechanism of Fault Generation
Generation
of refrigerant
flow distur-
bance
Bending/Blocking of a pipe
EEV fault Closing of SVC Valve
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.
■ Bending/Blocking of a pipe ■ Checking SVC Valve
Bending of a pipe
OPEN
Check pipes
SVC Valve
Check
EEV Check
Replacing a part of or
the entire pipes
SVC Valve Full Open
Replacing EEV
❈ EEV Checking Method :
Check the opening/closing
sound of EEV when the power
is applied for the first time.
Generation of refrigerant flow disturbance
6.7 Troubleshooting Outdoor Error
CH 21 (DC Peak / Comp IPM Fault)
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