Braking resistor overload prewarning

What does E2820 mean?

The external braking resistor is reaching its thermal limit due to excessive regenerated energy. Continued operation could lead to resistor damage or a full shutdown.

• Excessive braking cycles or too much regenerated energy for the resistor's rating.
• Braking resistor undersized for the application's duty cycle.
• Inadequate cooling for the braking resistor.
• Faulty braking resistor thermal sensor or incorrect parameterization.

Click steps to track your progress.

1. 1

   Check the application's braking duty cycle and ensure it is within the braking resistor's specifications. Reduce deceleration times if possible.

2. 2

   Verify the braking resistor's resistance and power rating against the drive and application requirements.

3. 3

   Ensure adequate airflow around the braking resistor for cooling and clear any obstructions.

4. 4

   Check the wiring of the braking resistor's thermal sensor, if present, and verify its functionality.