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TheAChub
External Protection Device Abnormality
Error Code A0
Applicable Models
All indoor models Method of Error Detection
Detect open or short circuit between external input terminals in indoor unit. Error Decision Conditions
When an open circuit occurs between external input terminals with the remote controller set to “external ON/OFF terminal”. Supposed Causes
Actuation of external protection device Improper field setting
Defective of indoor unit PCB 
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