Part 4 Functions And Control - Daikin Aurora Series Service Manual

SiUS341802E
1. Operation Flowchart (Outdoor Unit) ..........................................................42
2. Stop Control ..............................................................................................43
3. Standby Control ........................................................................................44
4. Startup Control ..........................................................................................45
5. Basic Control.............................................................................................47
6. Protection Control .....................................................................................54
7. Special Control..........................................................................................60
8. Other Control.............................................................................................65
9. Outline of Control (Indoor Unit) .................................................................67
Functions and Control
Functions and Control
2.1 Stop due to Error ........................................................................................ 43
2.2 When System is in Stop Mode ................................................................... 43
2.3 Slave Unit Stops during Master Unit Operation.......................................... 43
3.1 Restart Standby.......................................................................................... 44
3.2 Crankcase Heater Control.......................................................................... 44
4.1 Startup Control in Cooling .......................................................................... 45
4.2 Startup Control in Heating .......................................................................... 46
5.1 Normal Operation ....................................................................................... 47
5.2 Compressor PI Control............................................................................... 48
5.3 Operating Priority and Rotation of Compressors........................................ 49
5.4 Compressor Step Control........................................................................... 50
5.5 Electronic Expansion Valve PI Control....................................................... 52
5.6 Step Control of Outdoor Fans .................................................................... 53
6.1 High Pressure Protection Control............................................................... 54
6.2 Low Pressure Protection Control................................................................ 56
6.3 Discharge Pipe Protection Control ............................................................. 57
6.4 Compressor Body Protection Control......................................................... 58
6.5 Inverter Protection Control ......................................................................... 58
7.1 Pump Down Residual Operation ................................................................ 60
7.2 Oil Return Operation .................................................................................. 61
7.3 Defrost Operation ....................................................................................... 63
7.4 Outdoor Unit Rotation................................................................................. 64
8.1 Backup Operation....................................................................................... 65
8.2 Demand Operation ..................................................................................... 65
8.3 Heating Operation Prohibition .................................................................... 66
9.1 Operation Flowchart ................................................................................... 67
9.2 Set Temperature and Control Temperature ............................................... 69
9.3 Remote Controller Thermistor .................................................................... 71
9.4 Thermostat Control..................................................................................... 73
9.5 Drain Pump Control.................................................................................... 76
9.6 Control of Electronic Expansion Valve ....................................................... 78
Part 4
40