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What is an INF4 fault on an ATV12 drive?

Issue:
What is an INF4 fault on an ATV12 drive?

Product Line:
Altivar 12

Environment:
All

Cause:
N/A

Resolution:
This is an internal error.  This fault may occur if data within the drive is corrupted or if there are inconsistency.  
If somove/simple loader/multiloader is used to upload/download to the drive, then make sure that the firmware of the other drive (ATV12) matches along with the part number.
Using Non-matching drives to force download to another ATV12 can cause this issue.
Perform factory reset if needed to clear fault.
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