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SiUS041829E

22 Part 4 Functions and Control

1. Main Functions..........................................................................................23

1.1 Temperature Control .................................................................................. 23

1.2 Frequency Principle.................................................................................... 23

1.3 Airflow Direction Control............................................................................. 25

1.4 Fan Speed Control for Indoor Unit ............................................................. 26

1.5 Program Dry Operation .............................................................................. 27

1.6 Automatic Cooling/Heating Changeover .................................................... 28

1.7 Thermostat Control..................................................................................... 29

1.8 NIGHT SET Mode ...................................................................................... 30

1.9 ECONO Operation .................................................................................... 31

1.10 2-Area INTELLIGENT EYE Operation ....................................................... 32

1.11 POWERFUL Operation .............................................................................. 34

1.12 Multi-Monitor Lamp/TIMER Lamp .............................................................. 35

1.13 Clock Setting .............................................................................................. 36

1.14 WEEKLY TIMER Operation ....................................................................... 37

1.15 Other Functions.......................................................................................... 43

2. Thermistor Functions ................................................................................44

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 Temperature Control......................................................... 50

3.5 Input Current Control.................................................................................. 51

3.6 Freeze-up Protection Control ..................................................................... 52

3.7 Heating Peak-cut Control ........................................................................... 52

3.8 Outdoor Fan Control................................................................................... 53

3.9 Liquid Compression Protection Function.................................................... 53

3.10 Defrost Control ........................................................................................... 54

3.11 Electronic Expansion Valve Control ........................................................... 55

3.12 Malfunctions ............................................................................................... 58

Part 4

Functions and Control

Daikin FTXR-T Series Service Manual

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