No
Replace the indoor unit PCB
No
Repair the
connection
Yes
Yes
Fault diagnosis and Trouble shooting guide
03
Failure Checking Method
Error Item
Error Display
No.
Major Error Occurrence Cause
Meaning
Communication error
between wired remote
controller and indoor unit
If failing to receive wired
remote control signal at the
indoor unit
• Defective wired remote control
• Defective indoor unit PCB
• Poor connection, contact
Check transmission signal from the
indoor PCB is normal
Is transmission signal normal?
Check connection between indoor unit
and wired remote controller
Is connection normal?
Check or replace the
wired remote controller
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