LG ATNH09GRLE2 Svc Manual page 132

6.7 Troubleshooting Outdoor Error
CH 05/53 (Indoor/Outdoor Device Communication Error) → Detection by indoor devices
Applied Model : Multi/Single Outdoor PCBA
(Refer to PCB P/no of attached file)
Applied S/No : ~ 301xxxxxx (~ Jan, 2013)
1. Symptom
2. Causes
3. Improvement
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4. Trouble Shooting
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