Power Bridge Fault (Adv. Code 0,1,2)

What does 27 mean?

The drive has detected a failure in its output power devices, such as IGBTs or diodes within the power bridge. This critical fault can lead to uncontrolled motor operation, damage to the motor, or complete drive failure. It may also indicate a problem with the input power section.

Complete Troubleshooting Guide

1. 1

   Power down the drive immediately and disconnect all motor leads from the output terminals.

2. 2

   Perform a continuity or resistance test across the drive's output phases and between each phase and ground to check for internal shorts or open circuits.

3. 3

   Inspect the motor and motor cabling for any short circuits or insulation breakdown that could cause reflective damage to the drive.

4. 4

   If no external issues are found, the fault indicates internal drive hardware damage. Consult the factory for repair or replacement.