LG Therma V AHBW A0 Series - Page 68

Trouble Shooting Guide
- 68 -
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52
Transmission error
between (Inverter PCB ‘
Main PCB 2)
Main controller of Master
unit of Master unit canʼt
receive signal from
inverter controller
1. Power cable or transmission cable is not
connected
2. Defect of Main fuse/Noise Filter
3. Defect of Main / inverter PCB
Display
code
Title Cause of error Check point & Normal condition
n Error diagnosis and countermeasure flow chart
Is transmission
LED (Yellow) of inverter
compressor
PCB on?
Yes
No
Is noise filter or fuse
normal?
Replace noise filter or fuse
No
Replace inverter PCB
Is transmission cable
connected correctly?
Yes
No
Re-connect transmission cable
Is main PCB 2 normal?
Yes
No
Replace MAIN PCB 2
Replace inverter PCB
Yes
Check point
- Check the transmission connector and LED (Main & Inverter)
<MAIN PCB 2> <Inverter PCB>