Service Manual

SiUS091133

ii Table of Contents

1. Safety Considerations..................................................................................i

1.1 Safety Considerations for Repair .................................................................. i

1.2 Safety Considerations for Users....................................................................ii

Part 1

List of Functions ...................................................................1

1. Functions.....................................................................................................2

1.1 FTXS Series................................................................................................. 2

1.2 FDXS Series................................................................................................. 4

Part 2

Specifications .......................................................................5

1. Specifications..............................................................................................6

1.1 FTXS Series................................................................................................. 6

1.2 FDXS Series............................................................................................... 11

Part 3

Printed Circuit Board

Connector Wiring Diagram..................................................12

1. Indoor Unit.................................................................................................13

1.1 FTXS09/12LVJU ........................................................................................ 13

1.2 FTXS15/18/24/30/36LVJU ......................................................................... 16

1.3 FDXS09/12LVJU........................................................................................ 19

2. Outdoor Unit..............................................................................................21

2.1 RXS09/12LVJU .......................................................................................... 21

2.2 RXS15/18LVJU .......................................................................................... 23

2.3 RXS24LVJU, RK(X)S30/36LVJU ............................................................... 25

Part 4

Function and Control...........................................................27

1. Main Functions..........................................................................................28

1.1 Temperature Control .................................................................................. 28

1.2 Frequency Principle.................................................................................... 28

1.3 Airflow Direction Control (FTXS Series)..................................................... 30

1.4 Fan Speed Control for Indoor Unit ............................................................. 32

1.5 Program Dry Operation .............................................................................. 33

1.6 Automatic Operation................................................................................... 34

1.7 Thermostat Control..................................................................................... 35

1.8 NIGHT SET Mode ...................................................................................... 36

1.9 ECONO Operation ..................................................................................... 37

1.10 INTELLIGENT EYE Operation (FTXS Series) ........................................... 38

1.11 Inverter POWERFUL Operation................................................................. 39