Input Phase Loss

What does E.ILF mean?

This fault occurs when Pr.872 (Input phase loss protection selection) is enabled ('1') and one of the three phases of the input power supply to a three-phase model inverter is lost. The inverter immediately shuts off its output to prevent damage. This condition indicates a break, loose connection, or failure in one of the incoming power lines. Continued operation with a phase loss can lead to severe damage to the inverter's input rectifier bridge.

Complete Troubleshooting Guide

1. 1

   Inspect all input power cabling and connections to the inverter for any signs of breaks, loose terminals, or incorrect wiring.

2. 2

   Repair any damaged cable sections or secure loose connections to restore proper three-phase power supply.

3. 3

   Verify that Pr.872 (Input phase loss protection selection) is set appropriately for the application; set to '1' for protection, or '0' if this function is intentionally disabled (not recommended for 3-phase).