Daikin VRVIII-S, Service Manual

Page: 2 / 266

SiENBE34-703
Table of Contents i
R-410A
Heat Pump
50Hz
1. Introduction ........................................................................................... vi
1.1 Safety Cautions ....................................................................................... vi
1.2 PREFACE ................................................................................................x
Part 1 General Information ........................................................... 1
1. Model Names of Indoor/Outdoor Units....................................................2
2. External Appearance...............................................................................3
2.1 Indoor Units ..............................................................................................3
3. Capacity Range.......................................................................................4
Part 2 Specifications .................................................................... 5
1. Specifications ..........................................................................................6
1.1 Outdoor Units ...........................................................................................6
1.2 Indoor Units ..............................................................................................8
Part 3 List of Electrical and Functional Parts............................ 33
1. List of Electrical and Functional Parts ...................................................34
1.1 Outdoor Unit ...........................................................................................34
Part 4 Refrigerant Circuit ...........................................................35
1. Refrigerant Circuit .................................................................................36
1.1 RXYSQ4 / 5 / 6P ....................................................................................36
2. Functional Parts Layout ........................................................................38
2.1 RXYSQ4 / 5 / 6P ....................................................................................38
Part 5 Function............................................................................39
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 ..............................................................................46
3.3 Defrosting Operation ..............................................................................48
3.4 Pump-down Residual Operation ............................................................49
3.5 Restart Standby......................................................................................50
3.6 Stopping Operation ................................................................................51