Service Manual

Table Of Contents

SiUS181631EA

Table of Contents ii

1. Introduction ............................................................................................... vii

1.1 Safety Considerations .................................................................................vii

1.2 Icons Used ...................................................................................................ix

1.3 Legends........................................................................................................ix

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

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

1.1 Outdoor Unit ................................................................................................. 2

1.2 Indoor Unit.................................................................................................... 3

Part 2 Specifications ....................................................................... 9

1. Specifications ............................................................................................10

1.1 Outdoor Unit ............................................................................................... 10

1.2 Branch Provider (BP) Unit .......................................................................... 11

1.3 Indoor Unit.................................................................................................. 12

Part 3 Printed Circuit Board Connector Wiring Diagram .............. 21

1. Outdoor Unit..............................................................................................22

1.1 RMXS48LVJU ............................................................................................ 22

2. Branch Provider (BP) Unit.........................................................................25

2.1 BPMKS048A2U, BPMKS049A3U .............................................................. 25

3. Indoor Unit................................................................................................26

3.1 CTXG09/12/18QVJUW(S).......................................................................... 26

3.2 CTXS07JVJU, CTXS09/12HVJU ............................................................... 28

3.3 CTXS07LVJU, FTXS09/12LVJU ................................................................ 30

3.4 FTXS15/18/24LVJU ................................................................................... 32

3.5 FDXS09/12LVJU, CDXS15/18/24LVJU ..................................................... 34

3.6 FVXS09/12/15/18NVJU.............................................................................. 36

3.7 FFQ09/12/15/18Q2VJU.............................................................................. 38

4. Wired Remote Controller...........................................................................39

4.1 BRC1E73 ................................................................................................... 39

5. Wireless Remote Controller Kit .................................................................40

5.1 BRC082A41W, BRC082A42W(S).............................................................. 40

Part 4 Refrigerant Circuit .............................................................. 41

1. Refrigerant Circuit .....................................................................................42

1.1 Outdoor Unit ............................................................................................... 42

1.2 Branch Provider (BP) Unit .......................................................................... 43

2. Functional Parts Layout ............................................................................44

3. Refrigerant Flow for Each Operation Mode...............................................46

3.1 Cooling Operation ...................................................................................... 46

3.2 Heating Operation ...................................................................................... 47

3.3 Cooling Oil Return Operation ..................................................................... 48

3.4 Heating Oil Return Operation & Defrost Operation .................................... 49