Overcurrent shut-off during acceleration

What does OC During Acc mean?

The inverter output is shut off because the output current reached or exceeded approximately 200% of the rated current during the acceleration phase. This indicates that the motor load is too high for the acceleration rate, or there is an issue with the motor or wiring.

• Motor accelerating too rapidly for the connected load inertia or motor capability.
• Output short-circuit or ground fault occurring during acceleration.
• Motor or driven equipment experiencing mechanical binding or excessive friction.

Click steps to track your progress.

1. 1

   Increase the acceleration time setting (e.g., Pr. 7 or Pr. 44) to allow for a gentler ramp-up.

2. 2

   Measure the motor load current during acceleration and compare it to the motor nameplate rated current.

3. 3

   Inspect motor cable and motor terminals for signs of short-circuit or ground fault.