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Mini Split Heat Pump error codes

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4 guides found

Code A6 triggers when indoor fan motor fan speed drops below expected RPM or motor drawing excessive current.

Code U4 indicates communication loss on terminal 3 wire connecting indoor wall head to outdoor condenser PCB.

Code E6 alerts that communication signal between indoor controller board and outdoor board is broken or noisy.

Code P8 signals abnormal evaporator pipe temperature during heating or cooling mode, indicating protection shutdown.