63

Mechanical Brake Low

Danfoss · VLT Micro Drive FC 51

What does 63 mean?

The actual motor current failed to exceed the configured 'release brake' current within the specified 'start delay' time window. This indicates that the mechanical brake did not disengage as expected during the startup sequence, preventing the motor from moving.

Additional Steps

Steps 1–2 are listed in Priority Fix.

  1. 3

    Adjust the 'start delay' time window (e.g., parameter 1-97) to allow sufficient time for the mechanical brake to fully release.

  2. 4

    Inspect the brake wiring and its independent power supply (if applicable) for any issues preventing timely disengagement.

Source: Danfoss VLT Micro Drive FC 51
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