Hi, I am checking ACS800-04-260 VFD, it gives short circuit fault. The fault occures at different times,ie. as soon as start command given, at full speed and running for few minutes. We checked the motor insulation and reading are normal ( including cable). checked parameters 03.05-> 1 , 04.01->1 , and 4.02->4 . so we changed AINT-02C board and problem is same, Then we changed U Phase IGBT Module including AGDR-71C board. But still the same. I really appreciate if you can provide guidance on troubleshooting.