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.

Complete Troubleshooting Guide

1. 1

   Check that the supply voltage delivered to the frequency converter matches its nominal voltage rating.

2. 2

   Perform an input voltage test to confirm stable and correct incoming power to the drive.

3. 3

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