Daikin FTXS09HVJU Service Manual Download

Page: 31 / 274

SiUS04-904

Function and Control

Part 4

Function and Control

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

1.1 Frequency Principle................................................................................... 23
1.2 Power-Airflow Dual Louvers, Wide-Angle Fins and Auto-Swing .............. 24
1.3 Fan Speed Control for Indoor Units........................................................... 25
1.4 Program Dry Function ............................................................................... 26
1.5 Automatic Operation.................................................................................. 27
1.6 Thermostat Control.................................................................................... 28
1.7 NIGHT SET Mode ..................................................................................... 29
1.8 INTELLIGENT EYE ................................................................................... 30
1.9 HOME LEAVE Operation .......................................................................... 31
1.10 Inverter POWERFUL Operation ................................................................ 32
1.11 Other Functions......................................................................................... 33

2. Function of Thermistor ............................................................................. 35
3. Control Specification (09/12 Class).......................................................... 36

3.1 Mode Hierarchy ........................................................................................ 36
3.2 Frequency Control..................................................................................... 36
3.3 Controls at Mode Changing / Start-up....................................................... 38
3.4 Discharge Pipe Temperature Control........................................................ 40
3.5 Input Current Control................................................................................. 40
3.6 Freeze-up Protection Control .................................................................... 41
3.7 Heating Peak-cut Control .......................................................................... 42
3.8 Fan Control................................................................................................ 42
3.9 Liquid Compression Protection Function 2................................................ 42
3.10 Defrost Control .......................................................................................... 43
3.11 Electronic Expansion Valve Control .......................................................... 44
3.12 Malfunctions .............................................................................................. 47
3.13 Forced Operation Mode ............................................................................ 48
3.14 Additional Functions .................................................................................. 48

4. Control Specification (15/18/24 Class)..................................................... 49

4.1 Mode Hierarchy ......................................................................................... 49
4.2 Frequency Control..................................................................................... 50
4.3 Controls at Mode Changing / Start-up....................................................... 52
4.4 Discharge Pipe Temperature Control........................................................ 53
4.5 Input Current Control................................................................................. 53
4.6 Freeze-up Protection Control .................................................................... 54
4.7 Heating Peak-cut Control .......................................................................... 54
4.8 Fan Control................................................................................................ 55
4.9 Liquid Compression Protection Function 2................................................ 55
4.10 Low Hz High Pressure Limit ...................................................................... 55
4.11 Defrost Control .......................................................................................... 56
4.12 Electronic Expansion Valve Control .......................................................... 57

Daikin FTXS09HVJU, Service Manual

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