Mange pro no lowering all he way

Hi just got an Harlot Mange pro 8k
Did my first print and now the plate will not lower in to the tray. It only travels half way down the Z. I have done a reset and still the same. I can power off and manually turn the Z screw o lower the plate.
regards
Mike

Try to reboot the printer and if you press the bed level or homing what happen?