I did notice that the drive manual does not recommend your model as single phase input...... Note* 28?
Only models GS2-10P2, GS2-10P5,
GS2-11P0, GS2-20P5, GS2-21P0,
GS2-22P0, and GS2-23P0 are rated for
1-phase input power
Thats why the drive had to be derated....
From what I have read no drives over 3hp are rated to do what we are doing here with out derating.
The other issue we are hoping we slide by is if the drive has phase loss detection.
Some do some don't.
If it does its going to know there is no line three and go into phase loss fault.
We have had some really good knowledge input here but still counting on a little bit of luck...