Midea MS11M-09HRFN1-BW0W Service Manual page 2

1. Precaution ..................................................................................................................................................... 1
1.1 Safety Precaution .......................................................................................................................... 1
1.2 Warning ......................................................................................................................................... 1
2. Part Names And Functions .......................................................................................................................... 4
2.1 Model Names of Indoor/Outdoor units .......................................................................................... 4
2.2 Part names of Indoor/Outdoor units .............................................................................................. 5
3. Dimension ..................................................................................................................................................... 6
3.1 Indoor Unit ..................................................................................................................................... 6
3.2 Outdoor Unit .................................................................................................................................. 9
4. Refrigerant Cycle Diagram ........................................................................................................................ 10
5. Wiring Diagram ........................................................................................................................................... 11
6 Installation Details ....................................................................................................................................... 11
6.1 Wrench torque sheet for installation ........................................................................................... 11
6.2 Connecting the cables ................................................................................................................. 11
6.3 Pipe length and the elevation ...................................................................................................... 11
6.4 Installation for the first time ......................................................................................................... 12
6.5 Adding the refrigerant after running the system for many years ................................................. 12
6.6 Re-installation while the indoor unit need to be repaired ............................................................ 13
6.7 Re-installation while the outdoor unit need to be repaired ......................................................... 13
7. Operation Characteristics ......................................................................................................................... 15
8. Electronic Function .................................................................................................................................... 16
8.1 Abbreviation ................................................................................................................................. 16
8.2 Display function ........................................................................................................................... 16
8.3 Main Protection ........................................................................................................................... 17
8.4 Operation Modes and Functions ................................................................................................. 18
9. Troubleshooting ......................................................................................................................................... 23
9.1 Indoor Unit Error Display ............................................................................................................. 24
9.2 Outdoor unit error display ............................................................................................................ 25
9.3 Diagnosis and Solution ............................................................................................................... 29
10 Disassembly Instructions ......................................................................................................................... 58
10.1 Indoor unit ................................................................................................................................. 58
10.2 Outdoor unit ............................................................................................................................... 62
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