PURPOSE: To inexpensively confirm an operation by detecting a trouble of a relay contact by detecting a current amount exceeding a predetermined level of a current flowing to an operating circuit.

CONSTITUTION: In a remote control circuit, an operating circuit 4 is composed of an operation side power source 1, a relay 2, an operation switch 3, etc., a motor load 6 is connected to a load side power source 5 through the first relay contact 2a of the relay 2 to form a load circuit 7. A constant-current diode 8 is connected in series with the relay 2 between the relay 2 and the switch 3, and an operation confirming signal current circuit 10 of a series circuit of a current limiting resistor 9 and the second relay contact 2b is provided in parallel with the series circuit. Further, a relay 11 for detecting the current amount of the circuit 4 is provided, and a notifying circuit 12 is opened or closed by the contact 11a. Thus, even in case of 2-wire system, the malfunction of the circuit 7 due to a trouble of the contacts 2a∼2b can be confirmed by the switch 3 side.