6SE7021-8EB51-1AA1开机就报F002维修

 西门子6SE70变频器报警F026故障原因及排除方法

在节能用变频器，西门子6SE70变频器系列，运行启动就报警F026,或上电报警F026,有时复位后可以运行，或长按P键复位不了，根据维修实例总结一些经验，分析故障和简单现场排除仅供参考。西门子6SE70变频器报警F026时   F026故障检测电路是由驱动取样，通过光耦反馈至CUVC电路板，电流检测过大，检测回路自动保护，封锁脉冲。

1、运行启动就报F026,不能复位

故障表现在驱动脉冲丢失，电流Z自检报警，电路原件多为驱动陶瓷片单路性能不良，IGBT内部触发损坏，电阻变大。外围电机短路，接地故障均会造成故障报警。

2、开机就报警F026,按P键不能复位

这种情况多发于机器停几天后，生产开机时上电就报，由于环境恶劣，缺乏保养，环境湿气大，易潮，电路板积灰过多，造成元器件引脚短路，想当余并联电阻，造成检测电路误报，通常处理方法，把机器拆下来，清除灰尘，除湿。基本上80%故障就消除了。电路板供电正负15电压如果不正常造成驱动某路不工作也会上电就报。

3、CUVC电路检测芯片 损坏也会报警F026,可用替代法排除。驱动取样。通过光藕反馈至CUVC电路板。电流检测过大。检测回路自我保护，封锁脉冲。siemens 变频器6SE70专业维修，6SE70VC维修，6SE70MC维修，F029,F011,F026,F001,F002,F006，显示"E"无显示，电压输出不平衡，运行几分钟报过流，低速电机抖动等故障，配件齐全，西门子专业检测工具。  6SE70伺服驱动维修系类
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