Error 7: the fan in the Power Control Box has failed.

错误7：在电源控制箱的风扇出现故障。

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Wind power generated by fan blades (9) on the shaft enters a film picking barrel (5) through a wind blowing port (11) and blows the remnant films into a lifting film box (16).

轴上的风扇叶片（9）产生的风力通过吹风口（11）进入拾膜桶（5）内，将残膜吹进提升膜箱（16）里。

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