Confirm the transmission signal from
the indoor unit PCB
No
Replace the indoor unit PCB
Replace the wired
remote controller
No
Repair the
connection
Transmission signal is
normal?
Confirm the connection between indoor unit
and wired remote controller
The connection is
normal?
Yes
Yes
Fault diagnosis and Trouble shooting guide
Wired remote controller ↔
indoor unit transmission
error
03
• Wired remote controller PCB may be
poor
• Indoor unit PCB may be poor
• Defection of connection
In the case that indoor unit
can not receive any signal
from wired remote controller
successively for 3minutes
Trouble shooting Flow
Title
Display
code
Cause of errorMeaning
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