I would take Hood's advice. It's just one more step in the elimination process, it might lead you to solve the problem. He has an end game...your checking pins from X versus Z I take it.
Otherwise go back to the manual and the conditions for a fault:
Are you exceeding 20 amps, basic overcurrent? You'll need to measure somehow.
Is POSITION ERROR exceeding +/- 128 counts causing a break of the servo-lock. If so;
Conditions 1-3 are generally during a run so disregard for now
4) The current LIMIT is set too low. Not sure where your at with this?
5) The power supply current is insufficient for the demand. Don't think so your not moving yet but only drawing holding current
6) The motor is wired backwards, is broken or disconnected. It's new but could plus be reversed with minus on motor end?
7) Encoder failure. Most proable but you say you eliminated this with replacement known to be good?
The troubling part is that the fault should only come on for one of the above conditions so you have to figure out which one it is. If you lift the encoder wires power off does the fualt stay on?