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What can cause an ACF2 or AFE control loop fault2 on the ATV680 and ATV980 enclosed drives?

Published date: 11 October 2019

Issue:
Getting a ACF2 or AFE control loop fault 2 on the ATV680 and ATV980 enclosed drives.

Product Line:
ATV680 and ATV980 enclosed drives

Environment:
All 

Cause:
Probable cause:
- Unstable mains voltage

Resolution:
AFE Control Loop Fault 2
Principle:
If the average value over (3ms) of the switching frequency of the AFE brick is
above 14 KHz this error occurs to protect the DC link capacitors.

Probable cause:
- Unstable mains voltage
Remedies:
- Analyze the mains voltage

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