This document is the operation manual for Daikin room air conditioners, which introduces the usage methods and functions of models FTXS15HVJU, FTXS18HVJU, and FTXS24HVJU. The document includes safety precautions, parts names, operation preparation, AUTO, DRY, COOL, HEAT, FAN operations, as well as air flow direction adjustment, INTELLIGENT EYE operation, POWERFUL operation, OUTDOOR UNIT QUIET operation, HOME LEAVE operation, TIMER operation, and notes for multi system.