InF6
Unknown or Incompatible Option Board
Schneider Electric · Altivar Machine ATV320 Variable Speed Drive
What does InF6 mean?
An unknown or incompatible option board has been detected. This means the drive cannot recognize or properly integrate an installed option card, rendering its functions unavailable and potentially preventing the drive from starting. Check compatibility carefully.
Common Causes
- An installed option board is not recognized or is incompatible.
- Incorrect option board selected in configuration (e.g., P1-02).
- Damaged communication interface on the option board or drive.
- Firmware on the option board is outdated or corrupted.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Verify the option board part number and ensure it is compatible with the drive model and firmware.
- 2
Re-seat the option board firmly in its designated slot.
- 3
Power cycle the drive to allow for proper detection.
- 4
If recently installed, try removing the option board to see if the fault clears, indicating incompatibility.
Verified technical data. Last updated: March 2026
Related Faults
Source: Schneider Electric Altivar Machine ATV320 Variable Speed Drive