Control apparatus of air conditioning system

Electrical circuits (35a)-(37a) and exclusive ICs (35b)-(37b) which are for data communication are respectively included inside of a housing of actuator side connectors (22')-(24') of a harness assembly (30) which connects an A/C amplifier unit (16) and actuators (40), (50) and (60), and the actuator side connectors (22')-(24') are formed in a configuration possible to be connected to connectors (41)-(61) of the actuators (40)-(60) which are used in a door control apparatus which is designed not to carry out the data communication.