LG ARUV Series Service Manual page 274

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