When frequency converter and PLC is at fault, automatic switch to the original soft start work frequency power operation, ark to ensure the normal work of the compressor.

当变频器及PLC发生故障时，自动切换到原软启动柜工频电源运行，以保证压缩机的正常工作。

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Automatic switch, and simple operation procedure, can reduce power consumption.

自动开关，以及简便的操作程序，能够减少电能的消耗。

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Students will power is sent to the control box, press ON / OFF button switch ON keys, operation indicator light, machine.

将电源送至控制箱内，按下ON/OFF按钮开关的ON键，运转指示灯指示，机。

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