Issue:
What can cause a EEF1 fault on a ATV320 drive?

Product Line:
Altivar Machines, Altivar 320

Environment:
All models and serial numbers.

Cause:
Internal memory detected fault in the Main Control Board

Resolution:
Power cycle the drive.
Check the parameter settings.
If the fault returns, could reset to factory default settings.
If it still faults, contact the Drives Product Support Group.

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