During a power outage, the air conditioner's compressor shuts down. When power is restored, the compressor attempts to restart, but it can draw excessive current and cause the circuit breaker to trip again.
To prevent this problem, it is important to turn off the air conditioner and unplug it before a power outage occurs and keep it turned off for at least 5 minutes before plugging it back in after power is restored.
Additionally, using a surge protector can help to protect the air conditioner from damage caused by power surges.