Hi all.
I've found the problem. I hope.
You all above was wright.
My VFD Huanyang has imput connection -R S T .
That means L goes to R and N to one of those S or T.
The problem I foung is that my RCD is not strong enought tho hold the leakage that VFD make when is powered on.
Now the option is to upgrade my RCD to higher - ( which is very expensive) or disconect it , but only for my VFD.
Any suggestion? What should I do?
Shoul I try to connect it one more time but without the RCD?
Many thx. Stan