Daikin VRV EMERION REYQ-AATJA Service Manual page 149

SiUS372201EB
1. Operation Flowchart................................................................................144
2. Stop Control ............................................................................................145
3. Standby Control ......................................................................................146
4. Startup Control ........................................................................................147
5. Basic Control...........................................................................................149
6. Protection Control ...................................................................................159
7. Special Control........................................................................................165
8. Other Control...........................................................................................176
9. Outline of Control (Indoor Unit) ...............................................................177
Part 4 Functions and Control
Functions and Control
2.1 Stop due to Error ...................................................................................... 145
2.2 When System is in Stop Control............................................................... 145
2.3 Sub Unit Stops during Master Unit Control .............................................. 145
3.1 Restart Standby........................................................................................ 146
3.2 Crankcase Heater Control........................................................................ 146
4.1 Startup Control in Cooling ........................................................................ 148
4.2 Startup Control in Heating ........................................................................ 148
5.1 Normal Control ......................................................................................... 149
5.2 Compressor PI Control............................................................................. 150
5.3 Compressor Step Control......................................................................... 151
5.4 Electronic Expansion Valve PI Control..................................................... 155
5.5 Step Control of Outdoor Fans .................................................................. 156
5.6 Heat Exchanger Control ........................................................................... 158
6.1 High Pressure Protection Control............................................................. 159
6.2 Low Pressure Protection Control.............................................................. 161
6.3 Discharge Pipe Protection Control ........................................................... 162
6.4 Inverter Protection Control ....................................................................... 163
7.1 Pump Down Residual Operation .............................................................. 165
7.2 Oil Return Operation ................................................................................ 166
7.3 Defrost Operation ..................................................................................... 169
7.4 Outdoor Unit Rotation............................................................................... 172
7.5 Cooling/Heating Mode Switching ............................................................. 173
8.1 Backup Operation..................................................................................... 176
8.2 Demand Operation ................................................................................... 176
8.3 Heating Operation Prohibition .................................................................. 176
9.1 Operation Flowchart ................................................................................. 177
9.2 Set Temperature and Control Target Temperature.................................. 181
9.3 Remote Controller Thermistor .................................................................. 183
9.4 Thermostat Control................................................................................... 185
Part 4
142