LG ATNH09GRLE2 Svc Manual page 127

4. Trouble Shooting
6.7 Troubleshooting Outdoor Error
CH 05/53 (Indoor/Outdoor Device Communication Error) → Detection by indoor devices
2/2.5kW
4kW
PCBA Fuse
5kW
PCBA Fuse
6kW
PCBA Fuse
7kW
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