Daikin REYQ-XA Service Manual page 115

SiUS371901E
1. Function General.....................................................................................104
2. Stop Control ............................................................................................ 106
3. Standby Control ......................................................................................107
4. Startup Control ........................................................................................ 108
5. Basic Control........................................................................................... 110
6. Protection Control ................................................................................... 117
7. Special Control........................................................................................ 123
8. Other Control........................................................................................... 133
9. Outline of Control (Indoor Unit) ............................................................... 134
Functions and Control
Functions and Control
1.1 Outdoor Unit ............................................................................................. 104
1.2 Branch Selector Unit & Indoor Unit Operation Mode Detail ..................... 105
2.1 Stop due to Error ...................................................................................... 106
2.2 When System is in Stop Control............................................................... 106
2.3 Slave Unit Stops during Master Unit Control............................................ 106
3.1 Restart Standby........................................................................................ 107
3.2 Crankcase Heater Control........................................................................ 107
4.1 Startup Control in Cooling ........................................................................ 108
4.2 Startup Control in Heating ........................................................................ 109
5.1 Normal Control ......................................................................................... 110
5.2 Compressor PI Control............................................................................. 111
5.3 Compressor Step Control......................................................................... 112
5.4 Electronic Expansion Valve PI Control..................................................... 114
5.5 Step Control of Outdoor Fans .................................................................. 115
5.6 Heat Exchanger Control ........................................................................... 116
6.1 High Pressure Protection Control............................................................. 117
6.2 Low Pressure Protection Control.............................................................. 119
6.3 Discharge Pipe Protection Control ........................................................... 120
6.4 Compressor Body Protection Control....................................................... 121
6.5 Inverter Protection Control ....................................................................... 121
7.1 Pump Down Residual Control .................................................................. 123
7.2 Oil Return Control..................................................................................... 124
7.3 Defrost Control ......................................................................................... 127
7.4 Outdoor Unit Rotation............................................................................... 128
7.5 Cooling/Heating Mode Switching ............................................................. 129
8.1 Backup Operation..................................................................................... 133
8.2 Demand Operation ................................................................................... 133
8.3 Heating Operation Prohibition .................................................................. 133
9.1 Operation Flowchart ................................................................................. 134
9.2 Set Temperature and Control Temperature ............................................. 138
9.3 Remote Controller Thermistor .................................................................. 140
Part 4
102