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。
Link the control box to power and start carriage to check its moving direction.
将电源与单控箱连接，不过要注意接线方法。启动跑车，检查其运动方向。
Link the control box to power and start carriage to check its moving direction.
将电源与单控箱连接，不过要注意接线方法。启动跑车，检查其运动方向。
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