Error code library

Daikin Mini Split Heat Pump error codes

Search 2 diagnostic guides for Daikin Mini Split Heat Pump faults. Each guide explains what the code means, what to check, and which part may be involved.

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DaikinMini Split Heat Pump

Code A6

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

DaikinMini Split Heat Pump

Code U4

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