Overcurrent trip during constant speed

What does E.OC2 mean?

This fault indicates that the inverter's output current has reached or exceeded approximately 200% of its rated value while operating at a constant speed. This is typically caused by sudden increases in mechanical load, a short circuit, or a ground fault in the motor or its cabling. Persistent overcurrent can lead to overheating and premature failure of inverter components.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Review and adjust the stall prevention operation parameters (e.g., Pr. 156, Pr. 157) to ensure they are suitable for the application's load characteristics.