HP LaserJet Enterprise flow M830 Multifunction Printer series - Manual (Page 164)

11. Push the saddle-stitch carriage in.
NOTE: If the saddle-stitch carriage does not
easily slide into the finisher, the staple unit is not
closed properly. Pull the saddle-stitch carriage
out of the finisher and reseat the stapler unit.
12. Close the front left door.
154 Chapter 9 Solve problems ENWW