Put an air pressure gauge on the back of your plasma cutter to be sure you have at least 75 psi.
Try this electrode movement:
Check all your wiring for loose connections. Perhaps someone inadvertently unplugged and plugged a wire in an incorrect spot.
Can you fire the torch manually? Attach another torch (perhaps a hand torch) and see if you can get it to fire.
When you do a test fire with FireControl, do you hear the click in the enclosure box? If so, trace the torch on/off lead looking for any damage to the cable.