Overvoltage Error

What does E825 mean?

The mechanical system energy reflected via the motor was so large for a moment that the bleeder could not completely convert it to heat. This caused the DC bus voltage in the ECODRIVE DKC01.1/DKC11.1 drive to rise above the maximum allowable value. The motor is then switched to torque-free operation, and the controller will turn on again if the DC bus voltage falls below the maximum allowable value.

• Regenerative energy from the motor exceeded the capacity of the bleeder resistor (braking resistor) to dissipate heat.
• DC bus voltage is intrinsically too high due to unstable mains supply or an internal fault in the ECODRIVE DKC01.1/DKC11.1 drive.
• Open circuit or high resistance in the braking resistor circuit.
• Sudden deceleration of a high inertia load.

Click steps to track your progress.

1. 1

   Verify that the specified braking resistor (bleeder) is correctly connected and sized for the application's regenerative energy and duty cycle.

2. 2

   Check the braking resistor and its wiring for open circuits or damage using a multimeter.

3. 3

   Reduce the deceleration rate or mechanical load to lessen regenerative energy, if application permits.

4. 4

   Monitor the incoming AC supply voltage for overvoltage conditions or transients.

5. 5

   If external conditions are normal and the issue persists, the braking resistor or the ECODRIVE DKC01.1/DKC11.1 drive's internal bleeder circuit may be faulty and require service.