Examine the control panel, operating instrument and auto components, all the protection switches are on OFF position or STOP position.

检查控制盘内外部各操作和自动元件有无异常，各操作用防护开关是否关闭或者在停止位置。

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When have the over-load protection, the pressure overload, the red light or the yellow light glisten, and auto-stop.

配有过载保护装置，压力过载时，红灯或黄灯闪亮，并自动停机。

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