FF51

LINE CONV

ABB · ACS800 Standard Firmware

What does FF51 mean?

A fault has been detected on the line side converter. Specific details regarding this fault are typically documented in the dedicated line side converter manual.

Common Causes

  • Error related to the line converter or AC input stage.
  • Incorrect input voltage or frequency.
  • Faulty components in the AC-DC conversion circuit.
  • Power quality issues on the supply line.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Shift the control panel from the motor side converter control board to the line side converter control board to access its specific status.

  2. 2

    Refer to the line side converter manual for a detailed description of the active fault and troubleshooting procedures.

Browse all codes in this manual (33)
Verified technical data. Last updated: March 2026

Related Faults

Source: ABB ACS800 Standard Firmware