Brake Resistor Excess Temperature

What does A793 mean?

The temperature of the brake resistor has exceeded its configured warning limit (parameter 43.12). Continuous operation under this condition will lead to premature failure of the resistor and inability to dissipate regenerative energy, risking DC link overvoltage.

Complete Troubleshooting Guide

1. 1

   Stop the drive immediately to allow the brake resistor to cool down.

2. 2

   Review the resistor overload protection function settings within parameter group 43 (Brake chopper).

3. 3

   Check the warning limit setting in parameter 43.12 to ensure it is appropriate for the application.

4. 4

   Verify that the brake resistor is correctly dimensioned for the application's braking energy requirements.

5. 5

   Assess if the braking cycle frequency and duration meet the allowed limits for the installed resistor.