28 September 2021
A pump is oscillating (or surging) up and down when ramping up to speed on the ATS48 soft starter?Product line:
All models, all serial numbersCause:
Excessive motor slipResolution:
In the drC menu, reduce LSC. Generally, LSC = 30 will suffice.
LSC = Stator Loss Compensation
Oscillations are most common when controlling a motor with excessive slip.
Another option is to turn off the torque control. In the drC menu, set CLP = OFF.
Refer to the ATS48 Programming manual S1A37491