Part 4 Functions And Control - Daikin REYQ-TA Series Service Manual

SiUS371614E
1. Operation Flowchart (Outdoor Unit) ..........................................................58
2. Stop Control ..............................................................................................59
3. Standby Control ........................................................................................60
4. Startup Control ..........................................................................................61
5. Basic Control.............................................................................................63
6. Protection Control .....................................................................................73
7. Special Control..........................................................................................80
8. Other Control.............................................................................................88
9. Outline of Control (Indoor Unit) .................................................................89
Functions and Control
Functions and Control
2.1 Stop due to Error ........................................................................................ 59
2.2 When System is in Stop Mode ................................................................... 59
2.3 Slave Unit Stops during Master Unit Operation.......................................... 59
3.1 Restart Standby.......................................................................................... 60
3.2 Crankcase Heater Control.......................................................................... 60
4.1 Startup Control in Cooling .......................................................................... 61
4.2 Startup Control in Heating .......................................................................... 62
5.1 Normal Operation ....................................................................................... 63
5.2 Compressor PI Control............................................................................... 64
5.3 Operation Priority and Rotation of Compressors........................................ 64
5.4 Compressor Step Control........................................................................... 66
5.5 Electronic Expansion Valve PI Control....................................................... 69
5.6 Step Control of Outdoor Fans .................................................................... 70
5.7 Heat Exchanger Control ............................................................................. 72
6.1 High Pressure Protection Control............................................................... 73
6.2 Low Pressure Protection Control................................................................ 75
6.3 Discharge Pipe Protection Control ............................................................. 76
6.4 Compressor Body Protection Control......................................................... 77
6.5 Inverter Protection Control ......................................................................... 78
7.1 Pump Down Residual Operation ................................................................ 80
7.2 Oil Return Operation .................................................................................. 81
7.3 Defrost Operation ....................................................................................... 83
7.4 Cooling/Heating Mode Switching ............................................................... 84
8.1 Backup Operation....................................................................................... 88
8.2 Demand Operation ..................................................................................... 88
8.3 Heating Operation Prohibition .................................................................... 88
9.1 Operation Flowchart ................................................................................... 89
9.2 Set Temperature and Control Temperature ............................................... 91
9.3 Remote Controller Thermistor .................................................................... 93
9.4 Thermostat Control..................................................................................... 95
9.5 Drain Pump Control.................................................................................... 98
Part 4
56