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CONTENTS
Page
1.
SPECIFICATIONS ............................................................................................................. 1-1
1.1 Product External Views ...........................................................................................................................1-2
1.2 Product Specification ...............................................................................................................................1-3
1.2.1 Model Number and Product Name.......................................................................................1-3
1.2.2 Combination of Indoor Unit and Outdoor Unit....................................................................1-4
1.2.3 Structure Drawing ................................................................................................................1-7
1.2.4 Outdoor Unit Specifications .................................................................................................1-8
1.3 Outside Drawing of Outdoor Unit .........................................................................................................1-14
1.4 Outdoor Unit Internal Structure............................................................................................................1-16
1.5 Various Characteristics..........................................................................................................................1-18
1.5.1 Cooling and Heating Capabilities and Gas Consumption for Each Indoor Unit
Connection Capacities........................................................................................................1-18
1.5.2 Allowable Cooling and Heating Temperature Ranges .......................................................1-21
1.5.3 Changes According to Piping Length.................................................................................1-22
1.5.4 Fuel Comsunption ..............................................................................................................1-23
1.5.5 Outdoor Unit Operating Sound Characteristics.................................................................1-26
1.6 System Flow Chart .................................................................................................................................1-29
1.6.1 Refrigerant Circulation Diagrams and Description...........................................................1-29
1.6.2 Coolant/Fuel/Air Circulation Diagrams and Description..................................................1-31
2.
CONTROL ........................................................................................................................... 2-1
2.1 System Control Function List..................................................................................................................2-3
2.2 Remote Control Unit Functions ..............................................................................................................2-7
2.3 DIP Switches for Function Selection ......................................................................................................2-8
2.4 System Input/Output Specifications ......................................................................................................2-11
2.4.1 Indoor Unit Input/Output Specifications ............................................................................2-11
2.4.2 Outdoor Unit Input/Output Specifications..........................................................................2-13
2.5 Protection Units......................................................................................................................................2-15
2.5.1 Protection Units and Sensor Functions..............................................................................2-15
2.5.2 Sensor Mounting Positions.................................................................................................2-18
2.6 Outdoor Unit Electrical Wiring Diagrams ............................................................................................2-20
2.6.1 Outdoor Unit Electrical Wiring Diagram ..........................................................................2-20
2.6.2 Indoor Unit Wiring Diagram..............................................................................................2-23
3.
TROUBLE DIAGNOSIS AND REPAIR............................................................................ 3-1
3.1 Circuit Base Board Maintenance Functions ..........................................................................................3-2
3.2 Trouble Items and Diagnosis .................................................................................................................3-19
3.2.1 Error Codes, Contents, and Major Likely Causes..............................................................3-19
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