Midea MCHSU-18PHH2

CONTENTS
1. Precaution .................................................................................................................................................... 3
1.1 Safety Precaution .......................................................................................................................... 3
1.2 Warning ......................................................................................................................................... 3
2. Model list ...................................................................................................................................................... 6
3. Dimension .................................................................................................................................................... 7
3.1 Indoor Unit ..................................................................................................................................... 7
3.2 Outdoor Unit .................................................................................................................................. 9
4. Refrigerant Cycle Diagram ....................................................................................................................... 10
5. Wiring Diagram ........................................................................................................................................... 11
5.1 Indoor Unit .................................................................................................................................... 11
5.2 Outdoor Unit ................................................................................................................................ 13
6 Installation Details ...................................................................................................................................... 15
6.1 Wrench torque sheet for installation ........................................................................................... 15
6.2 Connecting the cables ................................................................................................................ 15
6.3 Pipe length and the elevation ..................................................................................................... 15
6.4 Installation for the first time ......................................................................................................... 16
6.5 Adding the refrigerant after running the system for many years ................................................ 16
6.6 Re-installation while the indoor unit need to be repaired ........................................................... 17
6.7 Re-installation while the outdoor unit need to be repaired ......................................................... 18
7. Operation Characteristics ......................................................................................................................... 19
8. Electronic function .................................................................................................................................... 20
8.1 Abbreviation ................................................................................................................................ 20
8.2 Display function ........................................................................................................................... 20
8.3 Main Protection ........................................................................................................................... 21
8.4 Operation Modes and Functions ................................................................................................. 22
9. Troubleshooting ......................................................................................................................................... 28
9.1 Indoor Unit Error Display ............................................................................................................. 29
9.2 Outdoor unit error display ........................................................................................................... 30
9.3 Diagnosis and Solution ............................................................................................................... 34
10 Disassembly Instructions ........................................................................................................................ 63
10.1 Indoor unit ................................................................................................................................. 63
10.2 Outdoor unit .............................................................................................................................. 67