LG L3-C363LA0 Service Manual page 38

Electronic Parts Troubleshooting Guide
4. When indoor Fan does not operate.(or "ON/OFF" led of display blinks 8 times)
Check it (Indoor/Outdoor)the connection line is complied with Wiring Diagram
38 MPS Multi Air Conditioner
Turn off Main power
Bad connection
Correct connection line
Check the line fuse in the outdoor unit
Check the connection of CN-MOTOR
check the operation of blower by manual
Check POLY S/W in indoor PCB Ass'y
If it is opened
Exchange Indoor PCB Ass'y
Good connection
If it is shorted
Check the outdoor PCB Ass'y