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.

Complete Troubleshooting Guide

1. 1

   Check that the supply voltage matches the drive's specified voltage rating on the nameplate.

2. 2

   Perform an input voltage test to verify a stable mains supply and check for transient sags.

3. 3

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