Teco has pretty tech support for these systems, have you tried talking to
them-
800-451-8798.

I have two 2HP Tecos on my 2HP mill and 2HP lathe and they've worked fine,
including starting the lathe with a heavy 8" tru-adjust chuck on it. They're
both running on single phase input with no problems.

As you have probably seen however, there are a zillion pararmeters that can
be set on these controllers. If you bought the unit used I would put them
all back to the default values as a starting point.

Good luck-

Paul T.