SiENBE18-621Function 59Part 5Function1. Operation Mode ....................................................................................602. Basic Control.........................................................................................612.1 Normal Operation ...................................................................................612.2 Compressor PI Control...........................................................................622.3 Electronic Expansion Valve PI Control...................................................652.4 Cooling Operation Fan Control...............................................................663. Special Control......................................................................................673.1 Startup Control .......................................................................................673.2 Oil Return Operation ..............................................................................683.3 Defrosting Operation ..............................................................................703.4 Pump-down Residual Operation ............................................................713.5 Restart Standby......................................................................................713.6 Stopping Operation ................................................................................724. Protection Control .................................................................................734.1 High Pressure Protection Control...........................................................734.2 Low Pressure Protection Control............................................................744.3 Discharge Pipe Protection Control .........................................................754.4 Inverter Protection Control .....................................................................764.5 Freeze-up Protection Control .................................................................774.6 Dew Condensation Prevention Control ..................................................785. Other Control.........................................................................................795.1 Demand Operation .................................................................................795.2 Heating Operation Prohibition ................................................................796. BP Unit Control .....................................................................................806.1 BP Unit Command Conversion ..............................................................806.2 BP Unit Electronic Expansion Valve Control ..........................................816.3 SH Control in Cooling Operation ............................................................836.4 SC Control in Heating Operation............................................................846.5 Heat Exchanger Isothermal Control in Heating Operation .....................847. Indoor Unit (RA Models)........................................................................857.1 Power-Airflow Dual Flaps, Wide Angle Louvers and Auto-Swing ..........857.2 Fan Speed Control for Indoor Units........................................................867.3 Programme Dry Function .......................................................................877.4 Automatic Operation...............................................................................887.5 Thermostat Control.................................................................................897.6 Night Set Mode.......................................................................................907.7 ECONO Mode ........................................................................................917.8 INTELLIGENT EYE ................................................................................927.9 HOME LEAVE Operation .......................................................................947.10 Inverter POWERFUL Operation .............................................................957.11 Other Functions......................................................................................968. Indoor Unit (SkyAir Models) ..................................................................988.1 Function Outline .....................................................................................988.2 Electric Function Parts ...........................................................................998.3 Function Details....................................................................................100