Daikin RXSQ24TAVJU, Service Manual, Page: 52 / 311

SiUS331708EA
39 Functions and Control
Part 4
Functions and Control
1. Operation Mode ........................................................................................40
2. Basic Control.............................................................................................41
2.1 Normal Operation ....................................................................................... 41
2.2 Compressor PI Control............................................................................... 42
2.3 Electronic Expansion Valve PI Control....................................................... 43
2.4 Cooling Operation Fan Control................................................................... 44
3. Special Control..........................................................................................45
3.1 Startup Control ........................................................................................... 45
3.2 Oil Return Operation .................................................................................. 47
3.3 Defrost Operation ....................................................................................... 49
3.4 Pump Down Residual Operation ................................................................ 50
3.5 Restart Standby.......................................................................................... 51
3.6 Stop Control ............................................................................................... 51
4. Protection Control .....................................................................................52
4.1 High Pressure Protection Control ............................................................... 52
4.2 Low Pressure Protection Control................................................................ 54
4.3 Discharge Pipe Protection Control ............................................................. 55
4.4 Inverter Protection Control ......................................................................... 56
5. Other Control.............................................................................................58
5.1 Demand Operation ..................................................................................... 58
5.2 Heating Operation Prohibition .................................................................... 58
5.3 Gas Furnace Operation Prohibition............................................................ 58
5.4 Gas Furnace Operation Startup Prohibition ............................................... 58
6. Outline of Control (Indoor Unit) .................................................................59
6.1 Operation Flowchart ................................................................................... 59
6.2 Set Temperature and Control Temperature ............................................... 63
6.3 Remote Controller Thermistor .................................................................... 65
6.4 Thermostat Control..................................................................................... 67
6.5 List of Swing Flap Operations .................................................................... 70
6.6 Hot Start Control (In Heating Operation Only)............................................ 71
6.7 Louver Control for Preventing Ceiling Dirt.................................................. 72
6.8 Drain Pump Control.................................................................................... 73
6.9 Electronic Expansion Valve Control ........................................................... 75
6.10 Freeze-Up Prevention ................................................................................ 76
6.11 Heater Control (Except FXTQ-TA Models)................................................. 78
6.12 Heater Control (FXTQ-TA Models)............................................................. 79
6.13 Gas Furnace Control (CXTQ-TA Models) .................................................. 82
6.14 3-Step Thermostat Processing (FXTQ-TA Models) ................................... 83
6.15 2-Step Thermostat Processing (CXTQ-TA Models) ................................... 84
6.16 Fan Control (Heater Residual) (FXTQ-TA Models) .................................... 85
6.17 Interlocked with External Equipment (FXTQ-TA and CXTQ-TA Models) ... 85