What causes 'DC-link voltage overvoltage' in Siemens Control Unit and how to fix it?
- JjsullivanSep 1, 2025
If your Siemens Control Unit reports a DC-link voltage overvoltage, try the following: Increase the ramp-down time (p1121), set the rounding times (p1130, p1136), activate the DC link voltage controller (p1240, p1280), check the line voltage (p0210), and inspect the line phases.