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SiUS041111

Table of Contents ii

Safety Consideration............................................................ vi

Part 1

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

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

Part 2

Specifications .......................................................................4

1. Specifications..............................................................................................5

1.1 Cooling Only................................................................................................. 5

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

Part 3

Printed Circuit Board

Connector Wiring Diagram..................................................11

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

1.1 09/12 Class ................................................................................................ 12

1.2 15/18/24 Class ........................................................................................... 14

2. Outdoor Unit..............................................................................................16

2.1 09/12 Class ................................................................................................ 16

2.2 15/18/24 Class ........................................................................................... 18

Part 4

Function and Control...........................................................20

1. Main Functions..........................................................................................21

1.1 Temperature Control .................................................................................. 21

1.2 Frequency Principle.................................................................................... 21

1.3 Airflow Direction Control............................................................................. 23

1.4 Fan Speed Control for Indoor Unit ............................................................. 24

1.5 Program Dry Operation .............................................................................. 25

1.6 Automatic Operation................................................................................... 26

1.7 Thermostat Control..................................................................................... 27

1.8 NIGHT SET Mode ...................................................................................... 28

1.9 ECONO Operation ..................................................................................... 29

1.10 Inverter POWERFUL Operation................................................................. 30

1.11 Other Functions.......................................................................................... 31

2. Function of Thermistor ..............................................................................32

3. Control Specification .................................................................................33

3.1 Mode Hierarchy.......................................................................................... 33

3.2 Frequency Control...................................................................................... 34

3.3 Controls at Mode Changing / Start-up........................................................ 36

Daikin FTXN24KVJU Service Manual

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