Part 4 Function - Daikin RXYQ72 Serivce Manual

SiUS39-601
1. Operation Mode ........................................................................................32
2. Basic Control.............................................................................................33
3. Special Control..........................................................................................40
4. Protection Control .....................................................................................49
5. Other Control.............................................................................................54
6. Outline of Control (Indoor Unit) .................................................................58
Function
2.1 Normal Operation ....................................................................................... 33
2.2 Compressor PI Control............................................................................... 34
2.3 Electronic Expansion Valve PI Control....................................................... 38
2.4 Cooling Operation Fan Control................................................................... 39
3.1 Startup Control ........................................................................................... 40
3.2 Oil Return Operation .................................................................................. 41
3.3 Defrosting Operation .................................................................................. 43
3.4 Pump-down Residual Operation ................................................................ 44
3.5 Restart Standby.......................................................................................... 45
3.6 Stopping Operation .................................................................................... 46
3.7 Pressure Equalization prior to Startup........................................................ 48
4.1 High Pressure Protection Control............................................................... 49
4.2 Low Pressure Protection Control................................................................ 50
4.3 Discharge Pipe Protection Control ............................................................. 51
4.4 Inverter Protection Control ......................................................................... 52
4.5 STD Compressor Overload Protection....................................................... 53
5.1 Outdoor Unit Rotation................................................................................. 54
5.2 Emergency Operation ................................................................................ 55
5.3 Demand Operation ..................................................................................... 57
5.4 Heating Operation Prohibition .................................................................... 57
6.1 Drain Pump Control.................................................................................... 58
6.2 Thermostat Sensor in Remote Controller................................................... 60
6.3 Freeze Prevention ...................................................................................... 62
Part 4
Function
31