Dehumidification mode on AC

Found this the other day. You can set your AC to cycle on every 4 hours to keep moisture under control. Page 8 of this link. While unit is on pree on and down button simultaneously? "hU1" shows on screen and you're off and running.
http://www.marineair.com/QBank/EPiServer/MarineAir/Manuals/Controls/2231-Marine-Air-Passport-Control-Operation-Manual_21429.pdf