Service Manual
Table Of Contents
- Cover
- Table of contents
- Part 1 List of Functions
- Part 2 Specifications
- Part 3 Printed Circuit Board Connector Wiring Diagram
- Part 4 Refrigerant Circuit
- Part 5 Functions and Control
- Part 6 Test Operation and Field Settings
- Part 7 Remote Controller
- Part 8 Troubleshooting
- 1. Troubleshooting with LED
- 2. Service Diagnosis
- 3. Error Codes and Description
- 4. Troubleshooting for CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series
- 5. Troubleshooting for FFQ Series
- 6. Troubleshooting for Branch Provider (BP) Unit
- 7. Troubleshooting for Outdoor Unit
- 8. Thermistor Resistance/Temperature Characteristics
- 9. Pressure Sensor
- 10. Method of Replacing Inverter’s Power Transistors Modules
- Part 9 Appendix
SiUS181631EA
Refrigerant Circuit 41
Part 4
Refrigerant Circuit
1. Refrigerant Circuit .....................................................................................42
1.1 Outdoor Unit ............................................................................................... 42
1.2 Branch Provider (BP) Unit .......................................................................... 43
2. Functional Parts Layout ............................................................................44
3. Refrigerant Flow for Each Operation Mode...............................................46
3.1 Cooling Operation ...................................................................................... 46
3.2 Heating Operation ...................................................................................... 47
3.3 Cooling Oil Return Operation ..................................................................... 48
3.4 Heating Oil Return Operation & Defrost Operation .................................... 49