Motor blocked

What does dEr mean?

This fault indicates that the motor's shaft is prevented from rotating or is rotating significantly slower than commanded, likely due to a mechanical obstruction or excessive load. By default, this critical condition triggers a full TRIP, inhibiting all ignition pulses and resetting the Ready signal to prevent motor damage, overheating, or mechanical stress on the system. Manual reset is required.

Complete Troubleshooting Guide

1. 1

   Check for mechanical obstructions: Visually inspect the motor, coupling, and driven machinery for any jams, foreign objects, or binding.

2. 2

   Disengage load (if possible): Attempt to disconnect the motor from the load to determine if the motor can rotate freely on its own.

3. 3

   Verify motor brake operation: If a motor brake is present, ensure it is releasing fully when commanded.

4. 4

   Measure motor current: Monitor motor current during attempted start to detect high currents indicating mechanical resistance.

5. 5

   Check motor bearings: Listen for unusual noises from the motor bearings that could indicate failure.