Daikin FDXS25EAVMB [3/223] Part 4 function and control 8

SiBE07-724_B

Table of Contents ii

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

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

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

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

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

1.1 Cooling Only.............................................................................................2

1.2 Heat Pump ...............................................................................................5

Part 2 Specifications .................................................................... 8

1. Specifications ..........................................................................................9

1.1 Cooling Only.............................................................................................9

1.2 Heat Pump .............................................................................................14

Part 3 Printed Circuit Board Connector Wiring Diagram ........... 19

1. Printed Circuit Board Connector Wiring Diagram..................................20

1.1 Indoor Unit..............................................................................................20

1.2 Outdoor Unit ...........................................................................................22

Part 4 Function and Control........................................................ 28

1. Main Functions......................................................................................29

1.1 Temperature Control ..............................................................................29

1.2 Frequency Principle................................................................................29

1.3 Fan Speed Control for Indoor Units........................................................31

1.4 Program Dry Operation ..........................................................................32

1.5 Automatic Operation...............................................................................33

1.6 Thermostat Control.................................................................................34

1.7 NIGHT SET Mode ..................................................................................35

1.8 HOME LEAVE Operation .......................................................................36

1.9 Inverter POWERFUL Operation .............................................................37

1.10 Other Functions......................................................................................38

2. Function of Thermistor ..........................................................................39

3. Control Specification .............................................................................40

3.1 Mode Hierarchy ......................................................................................40

3.2 Frequency Control..................................................................................41

3.3 Controls at Mode Changing / Start-up....................................................43

3.4 Discharge Pipe Temperature Control.....................................................45

3.5 Input Current Control..............................................................................46

3.6 Freeze-up Protection Control .................................................................47

3.7 Heating Peak-cut Control .......................................................................47

3.8 Outdoor Fan Control...............................................................................48

3.9 Liquid Compression Protection Function................................................48

3.10 Defrost Control .......................................................................................49

3.11 Electronic Expansion Valve Control .......................................................50

3.12 Malfunctions ...........................................................................................53

3.13 Standby Electricity Saving......................................................................54