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Si04-402A

Table of Contents

1. Introduction .............................................................................................v

1.1

Safety Cautions ........................................................................................v

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

1. List of Functions ......................................................................................2

Part 2 Specifications .................................................................... 3

1. Specifications ..........................................................................................4

Part 3 Printed Circuit Board

Connector Wiring Diagram ................................................. 9

1. Printed Circuit Board Connector Wiring Diagram..................................10

1.1

Indoor Unit..............................................................................................10

1.2

Outdoor Unit ...........................................................................................12

Part 4 Function and Control.......................................................15

1. Main Functions......................................................................................16

1.1

Frequency Principle................................................................................16

1.2

Power-Airflow Flap, Wide-Angle Louvres and Auto-Swing ....................18

1.3

Operation Starting Control......................................................................19

1.4

Fan Speed Control for Indoor Units........................................................20

1.5

Programme Dry Function .......................................................................21

1.6

Automatic Operation...............................................................................22

1.7

NIGHT SET Mode ..................................................................................23

1.8

INTELLIGENT EYE ................................................................................24

1.9

Inverter Powerful Operation ...................................................................25

1.10 Other Functions......................................................................................26

2. Function of Thermistor ..........................................................................27

2.1

Heat Pump Model...................................................................................27

3. Control Specification .............................................................................28

3.1

Mode Hierarchy ......................................................................................28

3.2

Frequency Control..................................................................................29

3.3

Controls at Mode Changing / Start-up....................................................30

3.4

Discharge Pipe Control ..........................................................................32

3.5

Input Current Control..............................................................................32

3.6

Freeze-up Protection Control .................................................................33

3.7

Heating Peak-cut Control .......................................................................33

3.8

Fan Control.............................................................................................34

3.9

Liquid Compression Protection Function 2.............................................34

3.10 Defrost Control .......................................................................................35
3.11 Electronic Expansion Valve Control .......................................................36
3.12 Malfunctions ...........................................................................................39
3.13 Forced Operation Mode .........................................................................40
3.14 Additional Function.................................................................................40