What is an INF9 error on an ATV61 drive?

Issue:
INF9 - Internal-I measure error displayed on ATV61 or ATV71 drive

Product Line:
Altivar 61
Altivar 71

Environment:
All

Cause:
N/A

Resolution:
This is an internal error indicating the current measurements are incorrect.

Depending on the part number of the drive, this would indicate issues with the Current Sensors, Power Board or the connections between them.
Both ATV61 and ATV71 drives have been discontinued for several years.  Parts may no longer be available.
Consider replacing the drive with a current product.

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