A: 1. Determine whether to restart the rotating motor. If so, you can wait until the motor stops stably or enable the speed tracking function.
2. Check whether the acceleration time of the VFD is too short or not, and extend the acceleration time. If the process of the customer allows, advised to replace the inverter with a higher power VFD.
3. Confirm whether the load of VFD changes suddenly during acceleration. If so, the protection value or acceleration time can be increased.
4. Check whether the output voltage is low while at 50Hz, and adjust the no-load current of the motor to make the output voltage reach 380V.
5. Check whether the output cable is too long. Generally more than 50m, output reactor or filter should be installed; generally, reactor should be added to submersible pump, and OC1 is easy to trip without reactor.
6. Check motor insulation.