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  • 维修案例

    西门子变频器维修 CS1系列

    2015-06-16 11:13:56
    今天2015年5月20日,公司司机从签订维修协议的客户拉回来一台西门子变频器,F001报警。经工程师检测后,分析出  f011 报警有两种情况:
    1) 西门子变频器故障现象:控制面板pmu液晶显示屏显示f011过电流报警。
    处理情况:更换CUVC板后故障依旧,说明原因在底板。分析电路互感器经a1再通过TL084给CUVC信号,如果大于说设置的电流将会发生
    报警并停车。用电阻档测。TL084周边电阻发现7脚输出电阻R4447变值为无穷大致使信号阻断,更换新电阻后送电试车一切正常
    2) 西门子变频器故障现象:控制面板pmu液晶显示屏显示f011报警。
    处理情况:更换CUVC板后,完全正常,说明故障在 CUVC 板 查 CUV。
    C 板将万用表黑表笔接触 2 红表笔接触 1 测其阻值偏大正常值应为 2.91k 再查 R 521, R 523, R 526 阻值已经变大 换新后试车
    一切正常。为了便于维修, 也可以自己制作了西门子变频器维修控制器。准确模仿了现场。提高维修效率。保证了维修的成功率在接540V直流前最好先用 24 V 低压试一下 以免发生不必要的损失。
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