LG Multi V CRUN Series Service Manual page 227

Fault diagnosis and Trouble shooting guide
Display
Title
code
22
Max CT
Trouble shooting Flow
Check whether pipe is blocked
Meaning
When current detection is
over the maximum current
limit
Is the detected
value of current
over the current
limit?
Yes
Is input voltage
normal?
Yes
Is compressor
normal?
Yes
and refrigerant state
• Malfunction of compressor
• Blocking of pipe
• Malfunction of current detection circuit
• Low voltage input
No
Check current detection circuit
and replace the PCB
No
Check power supply system
No
Replace compressor
Self-diagnosis function
Cause of error
Service Manual 227