Daikin FTKS25BVMB Service Manual Download

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SiBE04-302

Table of Contents

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

1.1

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

Part 1 List of Function .................................................................. 1

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

1.1

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

1.2

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

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

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

1.1

Cooling Only...........................................................................................10

1.2

Heat Pump .............................................................................................16

Part 3 Printed Circuit Board Connector Wiring Diagram ...........23

1. Printed Circuit Board Connector Wiring Diagram..................................24

1.1

Indoor Unit..............................................................................................24

1.2

Outdoor Unit ...........................................................................................27

Part 4 Function and Control........................................................29

1. Main Functions......................................................................................30

1.1

Frequency Principle................................................................................30

1.2

Power-Airflow Dual Flaps, Wide Angle Louvers and Auto-Swing ..........32

1.3

Fan Speed Control for Indoor Units........................................................33

1.4

Programme Dry Function .......................................................................34

1.5

Automatic Operation...............................................................................35

1.6

Night Set Mode.......................................................................................36

1.7

Intelligent Eye.........................................................................................37

1.8

Home Leave Operation ..........................................................................39

1.9

Inverter Powerful Operation ...................................................................40

1.10 Other Functions......................................................................................41

2. Function of Main Structural Parts..........................................................42

2.1

Main Structural Parts..............................................................................42

2.2

Function of Thermistor ...........................................................................43

3. Control Specification .............................................................................45

3.1

Mode Hierarchy ......................................................................................45

3.2

Frequency Control..................................................................................46

3.3

Controls at Mode Changing / Start-up....................................................48

3.4

Discharge Pipe Control ..........................................................................49

3.5

Input Current Control..............................................................................49

3.6

Freeze-up Protection Control .................................................................50

3.7

Heating Peak-cut Control .......................................................................50

3.8

Fan Control.............................................................................................51

3.9

Moisture Protection Function 1
(Securing of Differential Pressure and Blown Air Temperature) ............51

3.10 Moisture Protection Function 2...............................................................52
3.11 Defrost Control .......................................................................................53
3.12 Electronic Expansion Valve Control .......................................................54
3.13 Malfunctions ...........................................................................................57
3.14 Forced Operation Mode .........................................................................58