Daikin VRV X RXQ6-48ANR Series, Service Manual, Page: 62 / 297

SiME341909EA
56 Part 4 Functions and Control
1. Function Flowchart................................................................................57
2. Stop Control ..........................................................................................58
2.1 Abnormal Shutdown ...............................................................................58
2.2 Slave Unit Stops during Master Unit Operation......................................58
3. Standby Control ....................................................................................59
3.1 Restart Standby......................................................................................59
4. Startup Control ......................................................................................60
4.1 Cooling Startup Control ..........................................................................60
5. Normal Control ......................................................................................61
5.1 List of Functions in Normal Control ........................................................61
5.2 Compressor Control ...............................................................................61
5.3 Compressor Capacity Control ................................................................62
5.4 Operating Priority and Rotation of Compressors....................................63
5.5 Compressor Step Control.......................................................................64
5.6 Step Control of Outdoor Fans ................................................................64
6. Protection Control .................................................................................65
6.1 High Pressure Protection Control...........................................................65
6.2 Low Pressure Protection Control............................................................65
6.3 Discharge Pipe Protection Control .........................................................66
6.4 Compressor Body Protection Control.....................................................66
6.5 Inverter Protection Control .....................................................................67
7. Special Control......................................................................................68
7.1 Outdoor Unit Rotation.............................................................................68
7.2 Oil Return Control...................................................................................69
7.3 Inverter Pre-Heat Control .......................................................................70
8. Outline of Control (Indoor Unit) .............................................................71
8.1 Set Temperature and Control Target Temperature................................71
8.2 Thermostat Control.................................................................................71
8.3 Automatic Airflow Rate Control ..............................................................73
8.4 Airflow Direction Control.........................................................................74
8.5 Auto Draft Reducing Control (FXFSQ-AR only) .....................................75
8.6 Eco Full Automatic Control (FXFSQ-AR only)........................................75
8.7 Drain Pump Control................................................................................76
8.8 Freeze-Up Prevention Control................................................................78
8.9 Dew Condensation Prevention Control ..................................................79
8.10 Electronic Expansion Valve Control .......................................................80
8.11 Circulation Airflow (FXFSQ-AR only) .....................................................81
Part 4
Functions and Control