Output phase loss

What does E.LF mean?

The inverter output is shut off if one of the three phases (U, V, W) on the output side (motor/load side) is lost. This typically indicates a broken wire, loose connection, or open circuit in the motor wiring, leading to unbalanced currents and potential motor overheating.

Complete Troubleshooting Guide

1. 1

   Check the motor wiring thoroughly for proper connections and continuity across all three phases.

2. 2

   Ensure that the capacity of the motor used is not smaller than that of the inverter, which can sometimes lead to phase loss detection issues.

3. 3

   If using PM sensorless vector control, ensure a start command is not given while the motor is coasting; allow the motor to stop first or utilize the automatic restart/flying start function.