Close and lock the lid, set to multi grain, and adjust for 6 minutes. Press start/stop.
When done, quick release and make sure all pressure is released before opening lid.
Carefully open lid and remove the eggs with a spoon. Peel then dice eggs.
In a bowl, combine, mayo, mustard, vinegar, and sugar. Stir macaroni, egg, celery, salt, and pepper into mayo mixture. Let chill in fridge. Serve and enjoy.