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 6SE70变频器报故障代码F002,意思是:母线欠电压。有以下原因:1).一般为熔断器烧毁 。熔断器装置外有,装置内部也有。可用万用表量出是哪的烧了。换报险时千万不要带电换,很危险,而且易烧内部保险。并且要检查好烧保险原因才能更换。主要原因有几种,电机不匹配、电缆线对地、母线接触不良,
 2).变频器显示电压低,看R006显示电压,电压差太多,原因有下几种:
 装置内靠近保险出来的检测电路中有 N个电阻,作用是降电压比的,如果有烧毁的,电压显示就会变低,电阻坏的越多显示电压越低,
 3).CUVC板坏掉了,
 4).母线电压P071标定值太高,参数P071=   装置输入电压。
 以上几点可以助力快速解决F002的故障,      P071=    装置输入电压F002为预充电故障,判断: 在3s 的zui大预充电时间里达不到80%的zui小直流母线电压(P071 线电压x1.34)的话,则报F002故障。
 如果你的P071的值设置的是380V的话,则F002的报故障阈值为:380X1.34X80%=407.36V
   针对F002预充电故障,可能原因有以下几种——
 1、可能充电电容有问题。
 2、可能检测预充电电压电路有问题。
 3、若是存放一年以上的变频器,在使用前,必须预充电,否则就会烧坏电路板或报警。
 4、检查进线电源电压有无问题。是否电源电压太低,或者电源缺相。
 5、检查参数P071的设置是否正确。
 6、如果上述都正常,则检查变频器的整流单元——
 1)整流单元必须先于逆变器投入电网;
         2)整流单元的参数设置是否正确;         3)整流单元的硬件上是否存在问题,如熔断器烧了等等。 |