Table Of Contents - Daikin EWAQ016BAW Service Manual

1. Introduction .............................................................................................v
Part 1 - General Outline.................................................................. 1
1. Specifications ..........................................................................................2
2. Refrigerant Circuit ...................................................................................3
3. Water Circuit .........................................................................................18
4. Wiring Diagram .....................................................................................25
Part 2 - Functional Description .................................................... 39
1. Function General...................................................................................40
2. Basic Control.........................................................................................42
3. Special Control......................................................................................47
4. Protection Control .................................................................................53
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Table of Contents

1.1 Safety Cautions ........................................................................................v
1.1 Option Specifications................................................................................2
1.2 Technical Specifications...........................................................................2
1.3 Electrical Specifications............................................................................2
1.4 Nomenclature ...........................................................................................2
1.5 Operation Range ......................................................................................2
2.1 Refrigerant Circuit ....................................................................................3
2.2 Functional Parts Layout Outdoor Unit ......................................................9
2.3 Refrigerant Flow for Each Operation Mode............................................12
3.1 EWA/YQ016BA, 021BA, 025BA, 032BA................................................18
3.2 EWA/YQ040BA, 050BA, 064BA Module................................................20
3.3 Pressure Drop ........................................................................................22
4.1 Hydrobox Wiring.....................................................................................25
4.2 Wiring Diagram - Three Phase (3N~).....................................................28
4.3 Wiring Outdoor .......................................................................................29
4.4 Field Wiring ............................................................................................38
1.1 Symbol ...................................................................................................40
1.2 Operation Mode......................................................................................41
2.1 Normal Operation ...................................................................................42
2.2 Compressor PI Control...........................................................................43
2.3 Electronic Expansion Valve PI Control...................................................44
2.4 Step Control of Outdoor Unit Fans .........................................................45
2.5 Outdoor Unit Fan Control in Cooling Operation .....................................46
3.1 Startup Control .......................................................................................47
3.2 Defrosting Operation ..............................................................................49
3.3 Pump-down Residual Operation ............................................................50
3.4 Standby ..................................................................................................51
3.5 Stopping Operation ................................................................................52
4.1 High Pressure Protection Control...........................................................53
4.2 Low Pressure Protection Control............................................................54
4.3 Discharge Pipe Protection Control .........................................................55
4.4 Inverter Protection Control .....................................................................56
4.5 STD Compressor Overload Protection...................................................57
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Table of Contents