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SiBE041134EB

Table of Contents ii

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

1.1 Warnings and Cautions Regarding Safety of Workers.............................v

1.2 Warnings and Cautions Regarding Safety of Users............................... vii

2. Icons Used .............................................................................................ix

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

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

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

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

Part 3 Printed Circuit Board Connector Wiring Diagram ...........11

1. Indoor Unit.............................................................................................12

2. Outdoor Unit..........................................................................................14

2.1 RXS20/25K2V1B, RXS20/25K3V1B, RXS20/25L2V1B,

ARXS25L2V1B.......................................................................................14

2.2 RXS20/25L3V1B, ARXS25L3V1B..........................................................16

Part 4 Functions and Control...................................................... 17

1. Main Functions......................................................................................18

1.1 Temperature Control ..............................................................................18

1.2 Frequency Principle................................................................................18

1.3 Airflow Direction Control.........................................................................20

1.4 Fan Speed Control for Indoor Unit .........................................................21

1.5 Program Dry Operation ..........................................................................22

1.6 Automatic Operation...............................................................................23

1.7 Thermostat Control.................................................................................24

1.8 NIGHT SET Mode ..................................................................................25

1.9 ECONO Operation .................................................................................25

1.10 INTELLIGENT EYE Operation ...............................................................26

1.11 Inverter POWERFUL Operation .............................................................27

1.12 Clock Setting ..........................................................................................28

1.13 WEEKLY TIMER Operation ...................................................................29

1.14 Other Functions......................................................................................35

2. Thermistor Functions ............................................................................36

3. Control Specification .............................................................................37

3.1 Mode Hierarchy ......................................................................................37

3.2 Frequency Control..................................................................................38

3.3 Controls at Mode Changing / Start-up....................................................40

3.4 Discharge Pipe Temperature Control.....................................................42

3.5 Input Current Control..............................................................................43

3.6 Freeze-up Protection Control .................................................................44

3.7 Heating Peak-cut Control .......................................................................44

3.8 Outdoor Fan Control...............................................................................45

3.9 Liquid Compression Protection Function................................................45

3.10 Defrost Control .......................................................................................46

3.11 Electronic Expansion Valve Control .......................................................47

3.12 Malfunctions ...........................................................................................50

Brand	Daikin
Model	FTXS25K3V1B
Category	Air Conditioner
Language	English

Daikin FTXS25K3V1B Service Manual

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