LG ATNH126ELFC Service Manual page 114

Troubleshooting Guide
Troubleshooting CH03
Display
Title
code
Communication
03
Wired R/C
Check Point
1. Check the wire connection. (Open / Short)
2. Check the soldering state of connector. (Soldered poorly)
3. Check the volt. Of main PCB power source. (DC 12V, DC 5V)
4. Check the installation of wired remote controller. (Noise interference)
114 Synchro Air Conditioner
Cause of error
• Open / Short
• Wrong connection
Wired R/C
12V S GND 12V
12Vdc
V
Check the Volt.
Repair the connection
Check point & Normal condition
• Connection of wire
• Main PCB Volt. DC12V
• Noise interference
Indoor Unit
S GND
12Vdc
V
Check the Volt.
Repair or Change the PCB.
Repair or Change the main PCB.
Adjust the state of installation