Is the detected
value of current
over the current
limit?
Is input voltage
normal?
Check current detection circuit
and replace the PCB
Check power supply system
Is compressor
normal?
Replace compressor
Check whether pipe is blocked
and refrigerant state
No
Yes
Yes
Yes
No
No
Fault diagnosis and Trouble shooting guide
Max CT
22
• Malfunction of compressor
• Blocking of pipe
• Malfunction of current detection circuit
• Low voltage input
When current detection is
over the maximum current
limit
Trouble shooting Flow
Title
Display
code
Cause of errorMeaning
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