Sadly, it didn't help. The best it does in the svc mode is that it rotates with jerks with 1-5rpms stopping intermittently regardless of speed/freq I set with the trimpot.
So it doesn't work in svc mode at all and trips in v/f mode if frequency is below 120Hz.
The same motor works fine with my Huanyang v/f only inverter from ~1hz up to 400Hz which means that the motor itself is fine.