Fault diagnosis and Trouble shooting guide
Title
Display
code
Cause of errorMeaning
Is low
pressure
normal?
Replace low
pressure sensor
Does SVC valve
open?
Yes
Open SVC valve
No
Replace PCB
Check whether pipe is blocked
and refrigerant state
Does suction
pressure really
drop?
No
No
Yes
Yes
Low pressure
35
• Abnormal of sensor for detecting pressure of
suction pipe of compressor
• Malfunction of circuit for detecting pressure of
suction pipe of compressor
• Closing of SVC valve
• Shortage of refrigerant
Compressor off has occurred
3 times in1 hour
The suction pressure of
compressor is under the
limit
Trouble shooting Flow
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