DC under voltage

What does 8 mean?

If the intermediate circuit voltage (DC link) drops below the under-voltage limit, the frequency converter checks for a 24 V DC back-up supply. If no back-up is connected, the unit trips after a fixed delay. This condition can lead to unexpected shutdowns and loss of motor control.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Perform a soft charge circuit test, as issues in this circuit can prevent the DC link from charging correctly.