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What can cause a buF [DB unit sh. circuit] fault on an ATV340 series drive and how do I correct it?

Published date: 11 February 2019

Issue:
Customer is experiencing BUF [DB unit sh. circuit] Fault on an ATV340 series drive.

Product Line:
ATV340

Environment:
External Braking resistor is being used.

Cause:
 Short-circuit from braking circuit.

Resolution:
 Verify the wiring of the braking unit.
 Verify that the braking unit value is not too low.

 

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