SiUS041111
20 Function and Control
Part 4
Function and Control
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
3.4 Discharge Pipe Temperature Control......................................................... 39
3.5 Input Current Control.................................................................................. 40
3.6 Freeze-up Protection Control ..................................................................... 41
3.7 Heating Peak-cut Control ........................................................................... 41
3.8 Outdoor Fan Control................................................................................... 42
3.9 Liquid Compression Protection Function.................................................... 42
3.10 Defrost Control ........................................................................................... 43
3.11 Electronic Expansion Valve Control ........................................................... 45
3.12 Malfunctions ............................................................................................... 48
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