LG Therma V AHBW Series Service Manual page 58

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(Heater) power
source. (DC 12V,DC 5V)
Is it normal ?
Yes
Check the installation of
wired remote controller.
(Noise interference)
Is it normal ?
Check Point
1. Check the wire connection. (Open / Short) ' Repair the connection
2. Check the soldering state of connector. (Soldered poorly) ' Repair or Change the PCB(Heater).
3. Check the volt. Of Main PCB(Heater) power source. (DC 12V) ' Repair or Change the Main PCB(Heater).
4. Check the installation of wired remote controller. (Noise interference) ' Adjust the state of installation
Cause of error
• Connector connection
error
• Faulty PCB(Heater) /
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
- 58 -
Check point & Normal condition
• Connection of wire
• Main PCB(Heater) Volt. DC12V
• Noise interference
Wired R/C
12V S GND
(RD) (YL) (BK) (RD)
12Vdc
V
Check the Volt.
CN_REMO CN_REMO CN_REMO
Unit
12V S GND
(YL) (BK)
12Vdc
V
Check the Volt.