DC under voltage

What does 8 mean?

If the DC-link voltage drops below the undervoltage limit, the drive checks for a 24 V DC back-up supply. If no back-up is connected, the drive trips after a fixed time delay, which varies by unit size. This usually indicates an issue with the mains supply.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Perform a soft-charge circuit test, if applicable, to ensure the DC bus pre-charge is functioning correctly.