Infeed: Voltage dip in at least one line supply phase

What does 206205 mean?

This alarm indicates a voltage dip or overvoltage in one or more line supply phases during operation, causing pulses to be inhibited for at least 8 ms. The operating signal of the infeed unit remains active, but pulse inhibition is displayed. The specific cause (e.g., line angle deviation, active current deviation, line overvoltage/undervoltage, peak current trip, or line asymmetry) is detailed by the alarm value in r2124. If unresolved, this can lead to unstable drive operation and potential damage to components due to irregular power supply.

Complete Troubleshooting Guide

1. 1

   Check the line supply and fuses for proper connection and integrity.

2. 2

   Verify the quality of the line supply and system fault level.

3. 3

   Check the load on the system to ensure it's not causing dips or overloads.

4. 4

   Adjust limit values (p3463, p0284, p0285) if poor line quality or frequent line changeover operations are triggering the alarm.

5. 5

   Note previous A6205 alarm messages and their specific alarm values for detailed diagnostics.