| 摘要 |
PURPOSE:To store a trouble inexpensively instead of storing the trouble by using a semiconductor storage circuit by providing a fuse in a display power source for fusing at the time of the trouble as trouble display and trouble content storage means. CONSTITUTION:An output line of a signal A of a first trouble signal from a port 1a of a microprocessor 1 for controlling an inverter is connected to a load resistor 12 of a primary circuit of a photocoupler 4 provided at the output stage of a trouble display circuit through a first gate 2. A fuse 5 is provided as a display power source for fusing at the time of the trouble as trouble display and its trouble content storage means. That is, if an inverter or the like is troubled due to a malfunction, a fuse 5 of a circuit corresponding to a preset trouble display is fused. Thus, the trouble display circuit has a fail-safe function, outputs a normal signal at the time of normal operation including a light trouble, and fuses a fuse 5 at the time of a heavy trouble, thereby storing the trouble content. |
