MHI · R410A Systems
This code signifies a fault within the input circuit of the outdoor unit, which could be related to how power is received and processed.
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Turn off the main power supply to the air conditioning system at the circuit breaker.
Have a qualified technician inspect the input circuit of the outdoor unit.
The technician will check for loose connections or damaged components within the input circuit.
Restore power only after the fault has been identified and corrected.