Regenerative Overvoltage during Acceleration

What does E.OV1 mean?

Regenerative power or a power supply surge has caused the inverter's internal main circuit DC voltage to rise above the specified limit, triggering the protective shutdown. This can occur with rapid acceleration, especially with vertical loads, or if stall prevention settings are incorrect. Continued overvoltage can damage inverter components.

Complete Troubleshooting Guide

1. 1

   Decrease the acceleration time setting to reduce regenerative energy, and consider enabling the regeneration avoidance function (Pr.882, Pr.883, Pr.885, Pr.886).

2. 2

   Set Pr.22 Stall prevention operation level to a value higher than the motor's no-load current.

3. 3

   If applicable, set Pr.154 Voltage reduction selection during stall prevention operation to "11".