| 摘要 |
PURPOSE:To enable to cope with the control abnormality by remotely controlling even when the state of impossible communication develops by a structure wherein a safety circuit, which is brought into actuation by detecting the test overcurrent generated by an overcurrent detection circuit, is provided in a device main body. CONSTITUTION:An overcurrent generation circuit 13, which generates an overcurrent in power supply lines 9 by short-circuiting the lines by turning a switch 12 ON, is provided in a remote controller 7. At the same time, an overcurrent detection circuit 14 to detect the overcurrent developed in the power supply lines 9 and a safety circuit 15, which stops the power supply from a power circuit 3 to a device main body side control circuit 4 based upon the detection of overcurrent by the overcurrent detection circuit 14, are provided in a device main body 2. Thus, if the proper communication between the device main body 2 and the remote controller becomes impossible due to the uncontrollable runaway of the device main body side control circuit 4, the power supply to the device main body side control circuit 4 is stopped by bringing the safety circuit 15 into actuation by generating overcurrent by turning the switch 12 ON. |
