Specifications

Si34-704
Function 83
Part 4
Function
1. Function general ...................................................................................84
1.1 Symbol ...................................................................................................84
1.2 Operation Mode......................................................................................85
2. Basic Control.........................................................................................86
2.1 Normal Operation ...................................................................................86
2.2 Compressor PI Control...........................................................................86
2.3 Electronic Expansion Valve PI Control...................................................98
2.4 Step Control of Outdoor Unit Fans .........................................................98
2.5 Outdoor Unit Fan Control in Cooling Operation .....................................98
3. Special Control......................................................................................99
3.1 Startup Control .......................................................................................99
3.2 Oil Return Operation ............................................................................100
3.3 Pump-down Residual Operation ..........................................................101
3.4 Standby ................................................................................................102
3.5 Stopping Operation ..............................................................................103
4. Protection Control ...............................................................................105
4.1 High Pressure Protection Control.........................................................105
4.2 Low Pressure Protection Control..........................................................106
4.3 Discharge Pipe Protection Control .......................................................107
4.4 Inverter Protection Control ...................................................................108
4.5 STD Compressor Overload Protection.................................................109
4.6 Injection Control (only for RXQ5P) .......................................................109
5. Other Control.......................................................................................110
5.1 Outdoor Unit Rotation...........................................................................110
5.2 Emergency Operation ..........................................................................111
5.3 Demand Operation ...............................................................................115
6. Outline of Control (Indoor Unit) ...........................................................116
6.1 Drain Pump Control..............................................................................116
6.2 Louver Control for Preventing Ceiling Dirt............................................118
6.3 Thermostat Sensor in Remote Controller.............................................119
6.4 Thermostat Control while in Normal Operation ....................................120
6.5 Thermostat Control in Dry Operation ...................................................120
6.6 Electronic Expansion Valve Control .....................................................121
6.7 Freeze Prevention ................................................................................122
6.8 List of Swing Flap Operations ..............................................................123
6.9 Control of Outdoor Air Processing Unit
(Unique Control for Outdoor Air Processing Unit) ................................124