Service Manual

CONTENTS
1. Indoor Unit Combination .......................................................................................................................................... 4
2. Suggested Indoor Unit Model Numbers ...................................................................................................................5
3. Dimension Of Outdoor Unit...................................................................................................................................... 6
4. Refrigerant Cycle Diagram ........................................................................................................................................ 7
5. Installation Details .................................................................................................................................................... 9
5.1 Wrench torque sheet for installation ................................................................................................................. 9
5.2 Connecting the cables ........................................................................................................................................ 9
5.3 Pipe length and the elevation ............................................................................................................................. 9
5.4 Installation for the first time .............................................................................................................................. 9
5.5 Adding the refrigerant after running the system for many years .................................................................... 11
5.6 Procedure when servicing the indoor unit refrigeration circuit. ...................................................................... 12
5.7 Evacuation after servicing the outdoor unit refrigeration circuit .................................................................... 13
6. Electronic Function ................................................................................................................................................. 14
6.1 Abbreviation ..................................................................................................................................................... 14
6.2 Electric control working environment. ............................................................................................................. 14
6.3 Main Protection ................................................................................................................................................ 14
6.4 Control and Functions ...................................................................................................................................... 16
7. Wiring Diagrams ..................................................................................................................................................... 21
8. Troubleshooting ..................................................................................................................................................... 24
8.1Safety ................................................................................................................................................................. 24
8.2 Indoor Unit Error Display................................................................................................................................... 25
8.3 Outdoor Unit Display ........................................................................................................................................ 26
8.4 Diagnosis and Solution ..................................................................................................................................... 31
8.5 Trouble Criterion Of Main Parts. ...................................................................................................................... 80