Input Phase Loss Circuit Error

What does InFA mean?

A detected error in the input phase loss circuit. This indicates a problem with the drive's internal sensing of the incoming mains voltage phases, which is crucial for detecting power supply issues. This fault may falsely indicate a phase loss or miss a real one, impacting drive protection.

• Loss of one or more input phases detected by the drive's monitoring circuit.
• Loose connection on the main power input terminals (L1, L2, L3).
• Failure of a phase monitoring component within the drive.
• Motor winding fault causing uneven phase currents.

Click steps to track your progress.

1. 1

   Verify that all incoming three-phase power connections to the drive are secure and correct.

2. 2

   Check incoming mains voltage for stability and balance across all phases.

3. 3

   Power cycle the drive to reset the internal sensing logic.

4. 4

   If the fault persists, it indicates an internal hardware issue with the input phase detection circuit, requiring repair or replacement.