SiUS091133ii Table of Contents1. Safety Considerations .................................................................................. i1.1 Safety Considerations for Repair .................................................................. i1.2 Safety Considerations for Users....................................................................iiPart 1List of Functions ................................................................... 11. Functions.....................................................................................................21.1 FTXS Series ................................................................................................. 21.2 FDXS Series................................................................................................. 4Part 2Specifications ....................................................................... 51. Specifications ..............................................................................................61.1 FTXS Series ................................................................................................. 61.2 FDXS Series............................................................................................... 11Part 3Printed Circuit BoardConnector Wiring Diagram .................................................. 121. Indoor Unit.................................................................................................131.1 FTXS09/12LVJU ........................................................................................ 131.2 FTXS15/18/24/30/36LVJU ......................................................................... 161.3 FDXS09/12LVJU ........................................................................................ 192. Outdoor Unit..............................................................................................212.1 RXS09/12LVJU .......................................................................................... 212.2 RXS15/18LVJU .......................................................................................... 232.3 RXS24LVJU, RK(X)S30/36LVJU ............................................................... 25Part 4Function and Control........................................................... 271. Main Functions..........................................................................................281.1 Temperature Control .................................................................................. 281.2 Frequency Principle.................................................................................... 281.3 Airflow Direction Control (FTXS Series) ..................................................... 301.4 Fan Speed Control for Indoor Unit ............................................................. 321.5 Program Dry Operation .............................................................................. 331.6 Automatic Operation................................................................................... 341.7 Thermostat Control..................................................................................... 351.8 NIGHT SET Mode ...................................................................................... 361.9 ECONO Operation ..................................................................................... 371.10 INTELLIGENT EYE Operation (FTXS Series) ........................................... 381.11 Inverter POWERFUL Operation ................................................................. 39