Braking resistor overload

What does F2820 mean?

The external braking resistor has been overloaded, indicating it has dissipated too much energy and its temperature has likely exceeded safe limits. This occurs during regenerative braking when the motor feeds energy back into the drive. Continuous overload can damage the resistor or cause a fire hazard.

• Braking resistor too small for the application (insufficient power rating)
• Frequent or prolonged braking cycles
• Incorrect braking resistor parameters configured in the drive
• Faulty temperature sensor on the braking resistor (if applicable)
• Failure of cooling for the braking resistor

Click steps to track your progress.

1. 1

   Verify drive parameters P_0_0116 (Braking resistor power) and P_0_0117 (Braking resistor resistance) against the installed resistor's nameplate specifications.

2. 2

   Inspect the external braking resistor for any physical damage, signs of overheating (discoloration, charring), and ensure cooling fins/vents are clear and unobstructed.

3. 3

   Inspect all electrical connections and wiring between the IndraDrive and the braking resistor for tightness, corrosion, or signs of burning.

4. 4

   Measure the actual resistance value of the external braking resistor (with power off) and compare it to the nominal value specified on its nameplate and in drive parameter P_0_0117.

5. 5

   Verify the application's deceleration rates and braking cycle frequency to ensure they do not exceed the continuous power rating and duty cycle capabilities of the installed braking resistor.