Hi....
Easyest way to do is this (but this is rather a Macgyver way) : A axis AMP card has a FAULT wire. If this wire does not have + 20V on it (maybe more) then axis logic card (or CPU) will E-stop the CNC , and tells you that this is the problem. Maybe SETP settings are not relevant here. You shuld try to disconnect the AMP's Power or all logicel wires to it. If no change.... remove logic card aswell.
I hope i could help. If any more Qs you will find my skype address in my profile.
Akos
FADAL VMC4020 HT 1995, Z 28" (if true) , 88HS , 10K rmp , 21 TC geneva /rotary/ , VH-65 (A-axis) ,3ph 400V , metric, NO conveyor, No palette. (+alternative DC AMP)