Brake resistor short circuit

What does 25 mean?

This warning is triggered when the brake resistor is detected as short-circuited during operation. While the frequency converter remains operational, its braking function is disabled, posing a safety risk in applications requiring active braking. Continued operation without a functional brake resistor can lead to uncontrolled deceleration or safety hazards.

Complete Troubleshooting Guide

1. 1

   Immediately remove all power from the frequency converter to prevent further damage or risk.

2. 2

   Replace the faulty brake resistor with a new one of the correct specification, consulting parameter 2-15 (Brake Check) for relevant settings.

3. 3

   Carefully inspect the wiring connections to the brake resistor for any signs of physical damage, insulation breakdown, or direct short circuits.

4. 4

   After replacement, perform a brake check (if available in the drive's functions) to confirm proper operation of the new resistor.