What Causes an ILF Fault on an ATV320 Drive and How Can It Be Resolved?

An ILF (Internal Link Fault) on an ATV320 (Altivar 320) drive indicates a communication interruption between the drive and its installed option card.

How to Diagnose and Resolve an ILF Fault

Follow these steps to identify and correct the issue:

Swap the Option Card

• Replace the suspected option card with a known good card from a properly functioning ATV320 drive.
• Check whether the ILF fault follows the option card or remains with the drive.

Inspect the Environment

• Verify that the installation environment meets electromagnetic compatibility (EMC) requirements.
• Look for nearby sources of electrical noise or interference.

Check Connections

• Ensure all connectors between the drive and the option card are properly seated and secure.
• Inspect for damaged cables or bent pins.

Check the Mechanical Adapter

• If a mechanical adapter is installed, replace it and retest.

Replace the Option Card

• If the fault follows the card, replace the option card permanently.

Evaluate Network Load

• If the ILF fault persists after replacing the option card, network overload or excessive communication traffic may be the cause.

Contact Technical Support

• If the issue remains unresolved, contact Schneider Electric Product Support for further assistance.

If this article does not answer your question, check out our FAQ database that has answers to more commonly asked questions:

Frequently Asked Questions - Schneider Electric (se.com)

If this FAQ did not solve your issue, you can call us at 1-888-778-2733 Option 2 and then 4 or e-mail us atdrive.products.support@se.comto create a case with our Technical Support Team.

If you are not located in North America, please contact your local Customer Care Center for assistance:

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