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
Shift the control panel from the motor side converter control board to the line side converter control board to access its specific status.
- 2
Refer to the line side converter manual for a detailed description of the active fault and troubleshooting procedures.
Verified technical data. Last updated: March 2026
Related Faults
Source: ABB ACS800 Standard Firmware