Unit utilization (I²t) exceeded

What does 44 mean?

The inverter's utilization, based on its I²t (current squared time) thermal model, has exceeded 125%, indicating a sustained overload condition. This fault leads to an immediate disconnection to protect the inverter's power section from thermal damage due to prolonged high currents.

Complete Troubleshooting Guide

1. 1

   Decrease the power output required from the drive by reducing the mechanical load or limiting the operating speed.

2. 2

   Extend acceleration and deceleration ramps to lessen peak current demands during dynamic operations.

3. 3

   If the suggested actions are not feasible for the application, consider using a larger inverter that is more appropriately sized for the sustained load.