7

DC overvoltage

Danfoss · VLT AutomationDrive FC 301/302

What does 7 mean?

If the DC-link voltage exceeds a specific limit, the frequency converter will trip after a certain time delay. This typically occurs due to regenerative energy from the motor during deceleration or an issue with the mains supply.

Additional Steps

Steps 1–2 are listed in Priority Fix.

  1. 3

    Activate or adjust functions in parameter 2-10 Brake Function.

  2. 4

    If the alarm/warning occurs during a power sag, enable kinetic back-up via parameter 14-10 Mains Failure.

Source: Danfoss VLT AutomationDrive FC 301/302
View Official PDF