LG Single A Svc Manual page 70

6.7 Check code Trouble shooting CH03
Display
Title
code
Communication Error
03
(Wired remote controller)
Check Flow Chart
Check the wire
connection(Open /
Short / Miswirring)
Is it normal ?
Yes
Is the soldering state
of connector is normal?
Yes
Check the volt. of main
PCB power source.
(DC 12V,DC 5V)
Is it normal ?
Yes
Check the installation of
wired remote controller.
(Noise interference)
Is it normal ?
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Cause of error
• Connector connection
error
• Faulty PCB / Remote
controller
• Connection wire break
No
Correct connection
Or change connection wire
No
Re-soldering component
Or change the PCB
No
Correct connection
Or change the PCB
No
Adjust the state
of installation
- 69 -
Check point & Normal condition
• Connection of wire
• Main PCB Volt. DC12V
• Noise interference
CN-REMO
Wired R/C
S 12V GND
(YL) (RD) (BR)
12Vdc
V
Check the Volt.
5. Trouble Shooting
Indoor Unit
12V S GND
(RD) (YL) (BR)
12Vdc
V
Check the Volt.
LGE Internal Use Only