主机总电源开关不能启动：检查主令继电器是否损坏，过流继电器是否跳闸。
Total mainframe power switch could not be activated: check whether the Master relay is damaged, whether the flow relay tripped.
在使用中如按钮失灵(按钮松开后吊篮仍然继续上升或下降)、接触器触点粘合等情况，则立即断开总电源开关，停止使用。
If button failure (after button released, the basket still keep rising or falling) or adhesion happens in the process of use, the general power supply should be cut and stop using.
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