A power outage will not damage the system, when power returns the systems will continue in the same state it was in before the power outage. If an outage is scheduled it is best to stop work, turn off the systems functions and power down the system. In the event of a power surge or power fluctuation the frequency inverter for the circulation blower may experience an error. In this case simply turn circulation off, reset the error at the frequency inverter and turn circulation back on.