SiBE28-805Function 31Part 4Function1. Function General...................................................................................321.1 Symbol ...................................................................................................321.2 Operation Mode......................................................................................332. Basic Control.........................................................................................342.1 Normal Operation ...................................................................................342.2 Compressor PI Control...........................................................................352.3 Electronic Expansion Valve PI Control...................................................372.4 Step Control of Outdoor Unit Fans .........................................................372.5 Outdoor Unit Fan Control in Cooling Operation .....................................383. Special Control......................................................................................393.1 Startup Control .......................................................................................393.2 Oil Return Operation ..............................................................................403.3 Defrosting Operation ..............................................................................423.4 Pump-down Residual Operation ............................................................433.5 Standby ..................................................................................................443.6 Stopping Operation ................................................................................454. Protection Control .................................................................................474.1 High Pressure Protection Control...........................................................474.2 Low Pressure Protection Control............................................................484.3 Discharge Pipe Protection Control .........................................................494.4 Inverter Protection Control .....................................................................504.5 Injection Control (only for CMSQ200A7) ................................................515. Other Control.........................................................................................525.1 Demand Operation .................................................................................525.2 Heating Operation Prohibition ................................................................526. Outline of Control (Indoor Unit) .............................................................536.1 Drain Pump Control................................................................................536.2 Louver Control for Preventing Ceiling Dirt..............................................556.3 Thermostat Sensor in Remote Controller...............................................566.4 Thermostat Control while in Normal Operation ......................................586.5 Thermostat Control in Dry Operation .....................................................586.6 Electronic Expansion Valve Control .......................................................596.7 Hot Start Control (In Heating Operation Only)........................................596.8 Freeze Prevention ..................................................................................606.9 Heater Control ........................................................................................606.10 List of Swing Flap Operations ................................................................61