Mitsubishi Electric · MSZ-AP Air Conditioners
If the main power is turned off without first stopping the unit via the remote controller, and then turned back on, the unit will automatically resume operation in the same mode it was in before the power interruption.
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This is a normal safety feature designed for convenience; no immediate action is required.
If you do not want the unit to restart automatically, always ensure you stop the unit with the remote controller before turning off the main power.
To change the operation after an auto restart, simply use the remote controller as you normally would.