Midea AAC-18ISCH, Service Manual

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Content
2
Content
1. Precaution .......................................................................................................................... 1
1.1 Safety Precaution .............................................................................................................................. 1
1.2 Warning ............................................................................................................................................. 1
2. Function.............................................................................................................................. 3
3. Dimension........................................................................................................................... 5
3.1 Indoor unit
（
Alfa
）
............................................................................................................................ 5
3.2 Outdoor unit
（
Alfa
）
.......................................................................................................................... 5
3.3 Indoor unit
（
Corona
）
....................................................................................................................... 6
3.4 Outdoor unit
（
Corona
）
.................................................................................................................... 6
3.5 Indoor unit(Inverter Eco) .................................................................................................................... 7
3.6 Outdoor unit(Inverter Eco) ................................................................................................................. 7
3.7 Indoor unit(Inverter Star).................................................................................................................... 8
3.8 Outdoor unit(Inverter Star) ................................................................................................................. 8
4. Specification....................................................................................................................... 9
5. Refrigerant cycle diagram ............................................................................................... 12
6. Operation limits................................................................................................................ 13
6.1 Cooling operation............................................................................................................................. 13
6.2 Heating operation ............................................................................................................................ 13
7. Schematic diagram and Wiring diagram ........................................................................ 14
7.1. Schematic diagram .......................................................................................................................... 14
7.2. Wiring diagram ................................................................................................................................ 18
8. Installation details ............................................................................................................ 23
8.1 Wrench torque sheet for installation ................................................................................................ 23
8.2 Connecting the cables ..................................................................................................................... 23
8.3 Pipe length and the elevation .......................................................................................................... 23
8.4 Air purging of the piping and indoor unit .......................................................................................... 24
8.5 Pumping down (Re-installation) ....................................................................................................... 25
8.6 Re-air purging (Re-installation) ........................................................................................................ 26
8.7 Balance refrigerant of the 2-way, 3-way valves................................................................................ 27
8.8 Evacuation....................................................................................................................................... 28
8.9 Gas charging ................................................................................................................................... 29
9. Pressure table .................................................................................................................. 30
9.1 MSH-18HRIN1................................................................................................................................. 30
9.2 MSC-18HRIN1................................................................................................................................. 30
10. Capacity table ................................................................................................................... 31
10.1 MSH-18HRIN1................................................................................................................................. 31
10.2 MSC-18HRIN1................................................................................................................................. 32
10.3 MSG-09HRI ..................................................................................................................................... 33
10.4 MSG-12HRI ..................................................................................................................................... 33
10.5 MSG-21HRI ..................................................................................................................................... 34
10.6 MSG-24HRI ..................................................................................................................................... 34