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.

Complete Troubleshooting Guide

1. 1

   Investigate the mechanical system for sudden or excessive load changes that could cause current spikes.

2. 2

   Perform a thorough inspection of the motor and inverter output wiring for any short circuits or ground faults.

3. 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.