What can cause an InF3 or internal error 3 on the ATV630 and ATV930 Process drives?

Issue:
InF3 error on the ATV630 and ATV930 Process drives.

Product Line:
ATV630, ATV930, ATV660, ATV960 etc

Environment:
All

Cause:
ISL communication time out error between Application and power board

Resolution:
• Check the internal connections (44 pin ribbon cable between control block and power board).
• Replace the control block

In some situations INF3 has been reported on Size 7 drives running Firmware V3.7 IE40.  This was a rare occurrence, and only reported on Size 7.  This issue has been corrected on versions above 3.7.
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Frequently Asked Questions - Schneider Electric (se.com)

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