Daikin FTK20GV1B [3/184] Part 3 printed circuit board connector wiring diagram 3

Si04-807

ii Table of Contents

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

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

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

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

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

Part 2 Specifications .................................................................... 5

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

1.1 Cooling Only.............................................................................................6

1.2 Heat Pump ...............................................................................................8

Part 3 Printed Circuit Board Connector Wiring Diagram ........... 13

1. Printed Circuit Board Connector Wiring Diagram..................................14

1.1 Indoor Units ............................................................................................14

1.2 Outdoor Units .........................................................................................16

Part 4 Function and Control........................................................ 19

1. Main Functions......................................................................................20

1.1 Frequency Principle................................................................................20

1.2 Airflow Direction Control.........................................................................22

1.3 Fan Speed Control for Indoor Units........................................................23

1.4 Programme Dry Function .......................................................................24

1.5 Automatic Operation...............................................................................25

1.6 Thermostat Control.................................................................................26

1.7 NIGHT SET Mode ..................................................................................27

1.8 ECONO Mode ........................................................................................28

1.9 Inverter POWERFUL Operation .............................................................29

1.10 Other Functions......................................................................................30

2. Function of Thermistor ..........................................................................31

2.1 Heat Pump Model...................................................................................31

3. Control Specification .............................................................................32

3.1 Mode Hierarchy ......................................................................................32

3.2 Frequency Control..................................................................................33

3.3 Controls at Mode Changing / Start-up....................................................35

3.4 Discharge Pipe Temperature Control.....................................................36

3.5 Input Current Control..............................................................................37

3.6 Freeze-up Protection Control .................................................................38

3.7 Heating Peak-cut Control .......................................................................38

3.8 Fan Control.............................................................................................39

3.9 Liquid Compression Protection Function 2.............................................39

3.10 Defrost Control .......................................................................................40

3.11 Electronic Expansion Valve Control .......................................................41

3.12 Malfunctions ...........................................................................................44

3.13 Forced Operation Mode .........................................................................45

3.14 Additional Function.................................................................................45