CONTENTS
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 ................................................................................................. 4
2.3 Functions of Indoor/Outdoor units.................................................................................................... 5
3. Dimension ................................................................................................................................................ 8
3.1 Indoor Unit ..................................................................................................................................... 8
3.2 Outdoor Unit ................................................................................................................................ 10
4. Refrigerant Cycle Diagram .................................................................................................................... 11
5. Wiring Diagram ...................................................................................................................................... 12
5.1 Indoor Unit ................................................................................................................................... 12
5.2 Outdoor Unit ................................................................................................................................ 14
6 Installation Details ...................................................................................................................................... 19
6.1 Wrench torque sheet for installation ........................................................................................... 19
6.2 Connecting the cables ................................................................................................................ 19
6.3 Pipe length and the elevation ..................................................................................................... 19
6.4 Installation for the first time ....................................................................................................... 20
6.5 Adding the refrigerant after running the system for many years .................................................. 21
6.6 Re-installation while the indoor unit need to be repaired ........................................................... 21
6.7 Re-installation while the outdoor unit need to be repaired ......................................................... 22
7. Operation Characteristics ..................................................................................................................... 24
8. Electronic Function ................................................................................................................................... 25
8.1 Abbreviation ................................................................................................................................. 25
8.2 Display function ........................................................................................................................... 25
8.3 Main Protection ........................................................................................................................... 26
8.4 Operation Modes and Functions ................................................................................................. 28
9. Troubleshooting ........................................................................................................................................ 36
9.1 Indoor Unit Error Display ............................................................................................................. 37
9.2 Outdoor unit error display ........................................................................................................... 38
9.3 Diagnosis and Solution ............................................................................................................... 41
10. Exploded View ........................................................................................................................................... 65
10.1 Indoor unit ................................................................................................................................. 65
10.2 Outdoor unit ............................................................................................................................... 73
11 Disassembly Instructions .................................................................................................................... 81
11.1 Indoor unit .................................................................................................................................. 81
11.2 Outdoor unit ............................................................................................................................... 85
Summary of Contents for MROHC09AS
Page 14: ...12 5 Wiring Diagram 5 1 Indoor Unit MWOHC09S MWOHC12S MWOHC18S ...
Page 15: ...13 MWOHC24S ...
Page 16: ...14 5 2 Outdoor Unit MROHC09AS MROHC12AS ...
Page 17: ...15 MROHC18AS ...
Page 18: ...16 MROHC24AS MROHC09AS MROHC12AS ...
Page 19: ...17 MROHC18AS ...
Page 29: ...27 T2 7 C 44 6 F the compressor frequency will not be limited ...
Page 53: ...51 Take the 9k model as example P V P U ...
Page 54: ...52 N U P W ...
Page 55: ...53 N W N V ...