hi all, sorry because this topic written by english. I am vietnamese vfd engineer.
Today, I repair a Toshiba inverter that immediately turned on and reported error ef1.
I tried to redraw the circuit for measuring current but couldn't because it was too complicated.  The 2 pictures below are the voltages I measured at 4 ICs. I think it is related to the ef1 error. Can anyone tell me where it is going wrong?
Translate:
大家好，抱歉，因为这个主题是用英语写的。 我是越南vfd工程师。
今天维修一台东芝逆变器，立即开机报错ef1。
我尝试重新绘制测量电流的电路，但无法完成，因为它太复杂了。 下面两张图是我在4个IC上测得的电压。 我认为这与 ef1 错误有关。 谁能告诉我哪里出了问题？

隔壁解密板块倒是也有很多越南的朋友
啥时候。。。把越南弄过来就好了