To prevent such trouble that a protector against an overcurrent operates to turn off the system due to the excess over tolerance of the current flowing to the protector, in case that a compressor operates in the vicinity of the set maximum frequency, etc., and that it deteriorates the feeling at use of an air conditioner or that the electrified product other than the air conditioner stops.

This controller is equipped with a CT circuit 11 which detects the current flowing to the wiring of a housing, a suppressed current setting means 6 which drops the operation frequency of air conditioners 17 and 17' or stops the compressor of the air conditioner or sets the operation state of the air conditioners 17 and 17' to waiting condition, and a recovery current setting means 20 which sets the former operation state, and this removes the off operation of a protector 7 against an overcurrent caused by the power on to the electrified product other than the air conditioner.