An air conditioner includes: a power generating unit that generates drive power for driving the air conditioner; an output unit that drives a motor; a detecting unit that detects a DC voltage applied to the output unit; a motor drive control unit that controls the output unit based on a detection result from the detecting unit; a drive power supply unit that supplies an operating power source to the output unit and the motor drive control unit; a main body control unit that outputs a motor drive command or a motor drive stop command to the supply unit; a power circuit unit that supplies operating power to the main body control unit and the supply unit; and an input changeover switch that inputs the detection result to the motor drive control unit as the motor is driven, and cuts off input of the detection result as the motor stops.