Daikin VRV II RXYQ5MATL, Service Manual

Page: 76 / 331

Si39-504
Function 65
Part 4 Part 4 Part 4 Part 4
Function Function Function Function
1. Function general ...................................................................................66
1.1 Symbol ...................................................................................................66
1.2 Operation Mode......................................................................................67
2. Basic Control.........................................................................................68
2.1 Normal Operation ...................................................................................68
2.2 Compressor PI Control...........................................................................69
2.3 Electronic Expansion Valve PI Control...................................................75
2.4 Step Control of Outdoor Unit Fans .........................................................75
2.5 Outdoor Unit Fan Control in Cooling Operation .....................................76
3. Special Control......................................................................................77
3.1 Startup Control .......................................................................................77
3.2 Oil Return Operation ..............................................................................78
3.3 Defrosting Operation ..............................................................................80
3.4 Pump-down Residual Operation ............................................................81
3.5 Standby ..................................................................................................82
3.6 Stopping Operation ................................................................................83
3.7 Pressure Equalization prior to Startup....................................................85
4. Protection Control .................................................................................86
4.1 High Pressure Protection Control...........................................................86
4.2 Low Pressure Protection Control............................................................87
4.3 Discharge Pipe Protection Control .........................................................88
4.4 Inverter Protection Control .....................................................................89
4.5 STD Compressor Overload Protection...................................................90
4.6 Injection Control (only for RXYQ5MA)....................................................90
5. Other Control.........................................................................................91
5.1 Outdoor Unit Rotation.............................................................................91
5.2 Emergency Operation ............................................................................92
5.3 Demand Operation .................................................................................94
5.4 Heating Operation Prohibition ................................................................94
6. Outline of Control (Indoor Unit) .............................................................95
6.1 Drain Pump Control................................................................................95
6.2 Louver Control for Preventing Ceiling Dirt..............................................97
6.3 Thermostat Sensor in Remote Controller...............................................98
6.4 Thermostat Control While in Normal Operation ...................................100
6.5 Thermostat Control in Dry Operation ...................................................100
6.6 Freeze Prevention ................................................................................101
6.7 Heater Control ......................................................................................102
6.8 List of Swing Flap Operations ..............................................................103