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

VW3A3501; ATV71 with a CIC card VW3A3501 is tripping on ILF fault on power up.

Product line:
Altivar ATV71

All models, all serial numbers 

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.      

Per the CIC installation manual document number atv71_controller_inside_EN_V3 page 10 they recommend adding an external power supply part number  ABL7RE2402 to the controller inside cards +24vdc and com terminals.


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