| 摘要 |
PURPOSE:To prevent the overheat and burn of a motor or the over-discharge of a battery by cutting off the electricity to a compressor when the compressor can not be driven because of the power generation stop of a generator or the power supply voltage drop of the battery, etc. CONSTITUTION:When an alternator 7 is rotated by an engine to generate power, the normally-opened contact RL5a of a charge lamp relay RL5 is made off, a relay RL4 is not operated, a normally-closed contact RL4b is made on, and a compressor can be operated. When the engine stops and the alternator is not generating power, the contact RL5a is made on, the relay RL4 is operated, and the contact RL4b is made off. Accordingly, even if the normally-opened contact RL3a of a relay RL3 is made on, the compressor 3 is not operated, thereby the motor 3 can be prevented from being burnt when the compressor 3 can not be started because of the wear of the battery B or the voltage drop of the battery. |
