Daikin EWYQ021BAWP [48/223] Part 2 functional description

ESIE11-05

Functional Description 37

Part 2

Functional Description

1. Function General...................................................................................38

1.1 Symbol ...................................................................................................38

1.2 Operation Mode......................................................................................39

2. Basic Control.........................................................................................40

2.1 Normal Operation ...................................................................................40

2.2 Compressor PI Control...........................................................................41

2.3 Electronic Expansion Valve PI Control...................................................42

2.4 Step Control of Outdoor Unit Fans .........................................................43

2.5 Outdoor Unit Fan Control in Cooling Operation .....................................44

3. Special Control......................................................................................45

3.1 Startup Control .......................................................................................45

3.2 Defrosting Operation ..............................................................................47

3.3 Pump-down Residual Operation ............................................................48

3.4 Standby ..................................................................................................49

3.5 Stopping Operation ................................................................................50

4. Protection Control .................................................................................51

4.1 High Pressure Protection Control...........................................................51

4.2 Low Pressure Protection Control............................................................52

4.3 Discharge Pipe Protection Control .........................................................53

4.4 Inverter Protection Control .....................................................................54

4.5 STD Compressor Overload Protection...................................................55

5. Other Control.........................................................................................56

5.1 Emergency Operation ............................................................................56

5.2 Demand Operation .................................................................................58

6. Outline of Control (Hydrobox) ...............................................................59

6.1 Freeze Prevention ..................................................................................59

6.2 Thermostat Control.................................................................................60

6.3 Flow Control ...........................................................................................61

7. Field Setting from Outdoor Unit.............................................................62

7.1 Field Setting from Outdoor Unit..............................................................62

7.2 “Setting Mode 1”.....................................................................................67

7.3 “Setting Mode 2”.....................................................................................68

7.4 Monitor Mode .........................................................................................72

7.5 Setting of Low Noise Operation and Demand Operation .......................73

7.6 Setting of Refrigerant Recovery Mode ...................................................78

7.7 Setting of Vacuuming Mode ...................................................................79

8. Remote Controller .................................................................................80

8.1 Temperature Read Out for Remote Control ...........................................80

8.2 Field Setting ...........................................................................................81

8.3 Weekly Schedual....................................................................................94