Frequently asked questions
What causes a DB unit short circuit on an ATV61 drive?
FA275018
28 September 2021
Issue:Getting DB unit short circuit fault on Atlivar 61 or Altivar 71.
Product Line:
Altivar Machines, Altivar 61, Altivar 71
Environment:
All
Cause:
This fault appears only for the drives > 90kW.
Short circuit inside the braking module.
Braking resistor in short circuit.
Short circuit to the ground.
BRA=NO (ramp autoadaptation) and no braking resistor.
Resolution:
Check the wiring of the braking unit and the resistor.
Check the configuration of the drive.
Disable the BUF parameter in the Fault Management menu.