SiUS04111120 Function and ControlPart 4Function and Control1. Main Functions..........................................................................................211.1 Temperature Control .................................................................................. 211.2 Frequency Principle.................................................................................... 211.3 Airflow Direction Control............................................................................. 231.4 Fan Speed Control for Indoor Unit ............................................................. 241.5 Program Dry Operation .............................................................................. 251.6 Automatic Operation................................................................................... 261.7 Thermostat Control..................................................................................... 271.8 NIGHT SET Mode ...................................................................................... 281.9 ECONO Operation ..................................................................................... 291.10 Inverter POWERFUL Operation ................................................................. 301.11 Other Functions.......................................................................................... 312. Function of Thermistor ..............................................................................323. Control Specification .................................................................................333.1 Mode Hierarchy .......................................................................................... 333.2 Frequency Control...................................................................................... 343.3 Controls at Mode Changing / Start-up........................................................ 363.4 Discharge Pipe Temperature Control......................................................... 393.5 Input Current Control.................................................................................. 403.6 Freeze-up Protection Control ..................................................................... 413.7 Heating Peak-cut Control ........................................................................... 413.8 Outdoor Fan Control................................................................................... 423.9 Liquid Compression Protection Function.................................................... 423.10 Defrost Control ........................................................................................... 433.11 Electronic Expansion Valve Control ........................................................... 453.12 Malfunctions ............................................................................................... 48
