6-11
Symptom
Checkpoint
Remedy
Cause
Abnormal
frosting on
compressor
・
Frosting on
terminal
cover
・
Frosting on
compressor
head
Dusts caught in
injection solenoid
valve ISV
Defrost completed
Is the ISV
outlet pipe frosted?
(Leak from ISV)
ISV wiring check
Correct wiring
Replace the
ISV valve
Is there any frost
on the compressor?
Is there any frost
on the compressor?
Replace the EV
Finish
Manual defrost
Circuit breaker OFF
⇒
ON
NO
YES
NO
YES
NO
YES
YES
NO
YES
NO
※
As for the manual defrost, refer to P.2-20.
Faulty operation of
electronic expansion
valve (EV)
Ⅶ
Abnormal frosting on compressor
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