there is a thing on every air cond compressor called a klixon that heats up at the same rate the windings in the motor do. If in a brownout period the voltage goes down, then the amperage goes up. Fact or law of electric. the klixon will snap off until it cools and then snap back on. It should (repeat should) prevent the AC from turning to toast.If you hear the compressor cycling, turn it off.For best insurance, buy a Progressive EMS and it will turn off the electric for you. Absolute peace of mind for a couple hundred bucks