Mitsubishi Heavy Industries · R410A Systems
The outdoor unit has detected that the electrical phases are reversed. This indicates an issue with the power supply wiring to the outdoor unit.
Click steps to track your progress.
Turn off the main power supply to the unit at the circuit breaker.
Wait for at least 30 seconds before turning the power back on.
If the error persists, contact a qualified electrician to inspect the power supply wiring for correct phasing.