Overcurrent

What does OC mean?

This fault indicates that the inverter's output current has exceeded its safe operating limit, often due to a sudden increase in motor load, a short circuit in the motor wiring, or rapid acceleration. Excessive current can damage the inverter's power components (IGBTs) and the motor windings if sustained. It triggers a protective shutdown to prevent hardware failure.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Verify the motor parameters set in the inverter match the actual motor nameplate data.

2. 4

   Increase acceleration/deceleration times (parameters C1-01 / C1-02) if the fault occurs during speed changes.

3. 5

   Check for proper sizing of the inverter relative to the motor and application.