LG ARNU Series - Page 274

Troubleshooting Guide
- 274 -
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1. Loose connection of transmission cables
2. Transmission cables are open/sort
3. Defect of outdoor PCB
4. Defect of fan Main PCB
Error No. Error Type Error Point Main Reasons
Transmission error between
outdoor Main PCB and fan
Main PCB (Fan ➔ outdoor
main)
Transmission error between
outdoor unit Main PCB and
fan Main PCB
105
■ Error diagnosis and countermeasure flow chart
Is transmission LED
(yellow) of inverter fan
PCB on?*
Yes
No
Is noise filter or fuse
normal ? [refer electric
component part]
Replace noise filter or fuse
No
Yes
Replace inverter fan PCB
Are transmission cables
of Main PCB / Fan PCB
connected normally?
Yes
No
Re-connect transmission cables
Is green LED of
Main PCB blinks?**
Yes
No
Replace Main PCB
Replace inverter fan PCB
** Location of inverter transmission connector of
Main PCB and LED
*Location of PCB transmission connector of
Inverter FAN and LED