Part 4 Function - Daikin VRV II RXYQ8MY1K Service Manual

Si39-502A
1. Function General...................................................................................52
2. Basic Control.........................................................................................54
3. Special Control......................................................................................60
4. Protection Control .................................................................................69
5. Other Control.........................................................................................74
6. Outline of Control (Indoor Unit) .............................................................78
Function
1.1 Symbol ...................................................................................................52
1.2 Operation Mode......................................................................................53
2.1 Normal Operation ...................................................................................54
2.2 Compressor PI Control...........................................................................55
2.3 Electronic Expansion Valve PI Control...................................................58
2.4 Step Control of Outdoor Unit Fans .........................................................58
2.5 Outdoor Unit Fan Control in Cooling Operation .....................................59
3.1 Startup Control .......................................................................................60
3.2 Oil Return Operation ..............................................................................61
3.3 Defrosting Operation ..............................................................................63
3.4 Pump-down Residual Operation ............................................................64
3.5 Standby ..................................................................................................65
3.6 Stopping Operation ................................................................................66
3.7 Pressure Equalization Prior to Startup ...................................................68
4.1 High Pressure Protection Control...........................................................69
4.2 Low Pressure Protection Control............................................................70
4.3 Discharge Pipe Protection Control .........................................................71
4.4 Inverter Protection Control .....................................................................72
4.5 STD Compressor Overload Protection...................................................73
5.1 Outdoor Unit Rotation.............................................................................74
5.2 Emergency Operation ............................................................................75
5.3 Demand Operation .................................................................................77
5.4 Heating Operation Prohibition ................................................................77
6.1 Drain Pump Control................................................................................78
6.2 Louver Control for Preventing Ceiling Dirt..............................................80
6.3 Thermostat Sensor in Remote Controller...............................................81
6.4 Thermostat Control While in Normal Operation .....................................83
6.5 Thermostat Control in Dry Operation .....................................................83
6.6 Freeze Prevention ..................................................................................84
6.7 Heater Control ........................................................................................85
6.8 List of Swing Flap Operations ................................................................86
Part 4 Part 4
Part 4 Part 4
Function Function Function Function
51