AIR CONDITIONING SYSTEM FOR AUTOMOBILE

PROBLEM TO BE SOLVED: To provide a self-diagnosable function equal to the former ones by detecting whether or not a target position reaching signal is received from its object actuator after door position information for a prescribed inspection is transmitted to a single object actuator among plural actuators, and displaying it on a display part. SOLUTION: Respective actuators 18a to 18c are synthetically controlled by an automatic amplifier 22 integrating a microcomputer, and a single power source wire 23 and a single communication wire 24 are connected to each other, and are controlled by using serial communication. A communication signal (a serial signal) to be transmitted and received on the communication wire 24 is discriminating information of the actuators, an actuating-stopping signal of a motor, a targer position signal and error detecting information as information to the respective actuators 18a to 18c from the automatic amplifier 22. The information to the automatic amplifier 22 from the respective actuators 18a to 18c is composed of target position reaching information, and an operation-display part 26 is connected to the automatic amplifier 22, and a result of a self-diagnosis is displayed.