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What can cause a ILF fault on the ATV71 drive with an VW3A3501 CIC card installed?

Issue:
ILF fault on the ATV71 with an  VW3A3501 CIC card installed.

Product line:
Altivar ATV71

Environment:
All models, all serial numbers 

Cause:
If the CIC card is missing the external +24vdc pwr supply the drive will trigger an ILF fault after 1 sec of being powered up.      

Resolution:
Per the CIC installation manual document, atv71_controller_inside_EN_V3 page 10, it is recommended to add an external power supply part number ABL7RE2402 to the controller inside cards +24vdc and com terminals to resolve issue.
 

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