ILF1
Internal Link Fault 1
Schneider Electric · Altivar Machine ATV320 Variable Speed Drive
What does ILF1 mean?
Indicates a communication interruption between option card 1 and the drive. This fault code is read-only and persists until the drive is disconnected and reconnected to power. It implies that the functionality of option card 1 is unavailable, potentially impacting external communications or I/O.
Common Causes
- A specific internal communication path (Link 1) has failed.
- Defective internal wiring or termination at the connector.
- Interference on the internal communication bus.
- Failure of a connected slave device on Link 1.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Ensure option card 1 is properly seated and secured in its slot.
- 2
Inspect the connectors on both the option card and the drive for any physical damage.
- 3
Power cycle the drive to attempt a reset and re-establish internal communication.
- 4
If possible, try swapping option card 1 with a known good card to isolate the issue.
Verified technical data. Last updated: March 2026
Related Faults
Source: Schneider Electric Altivar Machine ATV320 Variable Speed Drive