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What is an EEF1 fault code in the ATV 61/71 drives?

Issue:
What is an EEF1 fault code in the ATV 61/71 drives? 

Product Line: 
ATV61 ATV71 

Environment: 
All serial numbers 

Cause: 
Will not clear with power cycle

Resolution: 
Fault name : EEF1 [Control Eeprom]     
Probable cause: Internal memory fault, control card
Remedy: 
• Check the environment (electromagnetic compatibility)
• Turn off, reset, return to factory settings
• Inspect/repair the drive
Replace the Control Block
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