CONTENTS
1. Indoor Unit Combination .......................................................................................................................................... 4
2. Suggested Indoor Unit Model Numbers ................................................................................................................... 6
3. Dimension Of Outdoor Unit ...................................................................................................................................... 7
4. Refrigerant Cycle Diagram ........................................................................................................................................ 8
5. Installation Details .................................................................................................................................................... 9
6.1 Wrench torque sheet for installation ................................................................................................................. 9
6.2 Connecting the cables ........................................................................................................................................ 9
6.3 Pipe length and the elevation ............................................................................................................................. 9
6.4 Installation for the first time .............................................................................................................................. 9
6.5 Adding the refrigerant after running the system for many years .................................................................... 11
6.6 Re-installation while the indoor unit need to be repaired ............................................................................... 11
6.7 Re-installation while the outdoor unit need to be repaired ............................................................................ 12
6. Electronic Function ................................................................................................................................................. 13
7.1 Abbreviation ..................................................................................................................................................... 13
7.2 Electric control working environment. ............................................................................................................. 13
7.3 Main Protection ................................................................................................................................................ 13
7.4 Control and Functions ...................................................................................................................................... 15
7. Wiring Diagrams ...................................................................................................................................................... 19
8. Troubleshooting ...................................................................................................................................................... 32
9.1Safety ................................................................................................................................................................. 32
8.2 Indoor Unit Error Display ............................................................................................................................. 33
9.3 Outdoor Unit Display ........................................................................................................................................ 36
9.4 Diagnosis and Solution ..................................................................................................................................... 40
9.5 Trouble Criterion Of Main Parts. ...................................................................................................................... 89
9. Disassembly Instructions ...................................................................................................................................... 100
Model: M2OC-18HFN1-M, M2OD-18HFN1-M (W210 metal plate) .................................................. 100
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