SiMT041509EFunction and Control 12Part 4Function and Control1. Main Functions......................................................................................131.1 Temperature Control ..............................................................................131.2 Frequency Principle................................................................................131.3 Airflow Direction Control.........................................................................151.4 Fan Speed Control for Indoor Unit .........................................................161.5 Program Dry Operation ..........................................................................171.6 Automatic Operation...............................................................................181.7 Thermostat Control.................................................................................191.8 NIGHT SET Mode ..................................................................................201.9 ECONO Operation .................................................................................201.10 INTELLIGENT EYE Operation ...............................................................211.11 Inverter POWERFUL Operation .............................................................221.12 Clock Setting ..........................................................................................231.13 WEEKLY TIMER Operation ...................................................................241.14 Other Functions......................................................................................302. Function of Thermistor ..........................................................................313. Control Specification .............................................................................323.1 Mode Hierarchy ......................................................................................323.2 Frequency Control..................................................................................333.3 Controls at Mode Changing / Start-up....................................................353.4 Discharge Pipe Temperature Control.....................................................363.5 Input Current Control..............................................................................373.6 Freeze-up Protection Control .................................................................383.7 Heating Peak-cut Control .......................................................................383.8 Outdoor Fan Control...............................................................................393.9 Liquid Compression Protection Function................................................393.10 Defrost Control .......................................................................................403.11 Electronic Expansion Valve Control .......................................................413.12 Discharge Pipe Thermistor Disconnection Control.................................433.13 Malfunctions ...........................................................................................43