SiUS04-924
Function and Control 11
Part 4
Function and Control
1. Main Functions..........................................................................................12
1.1 Frequency Principle.................................................................................... 12
1.2 Airflow Direction Control............................................................................. 14
1.3 Fan Speed Control for Indoor Units............................................................ 15
1.4 Program Dry Function ................................................................................ 16
1.5 Automatic Operation................................................................................... 17
1.6 Thermostat Control..................................................................................... 18
1.7 NIGHT SET Mode ...................................................................................... 19
1.8 ECONO Mode ............................................................................................ 20
1.9 INTELLIGENT EYE.................................................................................... 21
1.10 Inverter POWERFUL Operation................................................................. 23
1.11 Other Functions.......................................................................................... 24
2. Function of Thermistor ..............................................................................26
3. Control Specification .................................................................................27
3.1 Mode Hierarchy.......................................................................................... 27
3.2 Frequency Control...................................................................................... 28
3.3 Controls at Mode Changing / Start-up........................................................ 30
3.4 Discharge PipeTemperature Control.......................................................... 32
3.5 Input Current Control.................................................................................. 33
3.6 Freeze-up Protection Control ..................................................................... 34
3.7 Fan Control................................................................................................. 35
3.8 Liquid Compression Protection Function 2................................................. 35
3.9 Electronic Expansion Valve Control ........................................................... 37
3.10 Malfunctions ............................................................................................... 40
3.11 Forced Operation Mode ............................................................................. 41
3.12 Additional Functions................................................................................... 41
3.13 Facility Setting Switch (cooling at low outdoor temperature)...................... 42