6-7
Symptom
Checkpoint
Remedy
Cause
The low
pressure is
excessively
high
Solenoid valve
internal leak(BSV,
DSV, HSV)
Solenoid valve
internal leak(ISV)
Faulty compression
by compressor
Replace the compressor
Leak from solenoid valve
⇒
Replace
Is pull-down possible?
Finish
Normal operation
Is HSV, DSV, BSV
outlet pipe hot?
Is the ISV
outlet pipe hot?
Circuit breaker OFF
→
ON
Leak from solenoid valve
⇒
Replace
*HSV: Hot gas solenoid valve
DSV: Defrost solenoid valve
BSV: Discharge gas bypass solenoid valve
*ISV: Injection solenoid valve
YES (Hot)
YES (Hot)
YES
NO (Cold)
NO (Cold)
NO
Ⅲ
Inside temperature does not drop
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