Overcurrent trip during acceleration

What does E.OC1 mean?

This overcurrent trip occurs during acceleration when the inverter output current reaches or exceeds approximately 230% of its rated current. It indicates that the motor is experiencing excessive load, sudden acceleration demands, or a potential electrical fault. The inverter trips to protect itself and the motor.

Complete Troubleshooting Guide

1. 1

   Increase the acceleration time setting in the inverter parameters; for lifts, shorten the downward acceleration time.

2. 2

   Inspect all wiring for the motor and output circuit for any short-circuits or ground faults.

3. 3

   Verify that Pr. 3 (Base frequency) is set correctly for the motor's rated frequency (e.g., 50Hz for a 50Hz motor, not 60Hz).

4. 4

   Lower the setting of the stall prevention operation level (Pr. 22) and activate the fast-response current limit operation.

5. 5

   Set Pr. 19 (Base frequency voltage) to the motor's rated voltage. If E.OC1 continuously appears at startup, disconnect the motor and re-test; if it persists, contact your sales representative.