SiAU18-715
Table of Contents iii
1. Introduction .......................................................................................... viii
1.1 Safety Cautions ..................................................................................... viii
1.2 Used Icons ............................................................................................. xii
Part 1 List of Functions ................................................................ 1
1. List of Functions......................................................................................2
1.1 Cooling Only.............................................................................................2
1.2 Heat Pump ...............................................................................................7
Part 2 Specifications .................................................................. 13
1. Specifications ........................................................................................14
1.1 Cooling Only...........................................................................................14
1.2 Heat Pump .............................................................................................23
Part 3 Printed Circuit Board Connector Wiring Diagram ........... 35
1. Printed Circuit Board Connector Wiring Diagram..................................36
1.1 Outdoor Unit ...........................................................................................36
1.2 BP Unit ...................................................................................................41
1.3 Wall Mounted Type 20/25/35 Class .......................................................42
1.4 Wall Mounted Type 50/60/71 Class .......................................................44
1.5 Duct Connected Type.............................................................................46
1.6 Floor / Ceiling Suspended Dual Type.....................................................48
1.7 Floor Standing Type ...............................................................................51
1.8 Ceiling Mounted Cassette 600×600 Type ..............................................54
1.9 Ceiling Mounted Cassette Type (950×950)............................................57
1.10 Ceiling Mounted Built-in Type ................................................................60
1.11 Ceiling Suspended Type ........................................................................62
Part 4 Refrigerant Circuit ........................................................... 65
1. Refrigerant Circuit .................................................................................66
1.1 Outdoor Units .........................................................................................66
1.2 BP Units .................................................................................................68
2. Functional Parts Layout ........................................................................69
2.1 Outdoor Units .........................................................................................69
3. Refrigerant Flow for Each Operation Mode...........................................70
3.1 Cooling Operation ..................................................................................70
3.2 Heating Operation ..................................................................................71
3.3 Cooling Oil Return Operation .................................................................72
3.4 Heating Oil Return Operation & Defrost Operation ................................73
Part 5 Function............................................................................ 75
1. Operation Mode ....................................................................................76
2. Basic Control.........................................................................................77
2.1 Normal Operation ...................................................................................77
2.2 Compressor PI Control...........................................................................78
2.3 Electronic Expansion Valve PI Control...................................................81
2.4 Cooling Operation Fan Control...............................................................82
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