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TheAChub
Reverse Phase, Open Phase
Error Code U1
Applicable Models
REYQ-T Method of Error Detection
The phase of each phase are detected by reverse phase detection circuit and right phase or reverse phase are judged. Error Decision Conditions
When a power supply is reverse phase, or T phase is open phase. Supposed Causes
Power supply reverse phase T phase open phase
Defective outdoor unit PCB (A1P) 
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