LG Multi V CRUN Series Service Manual page 222

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