Table Of Contents - Midea MS9A-09HRDN1-QC2 Service Manual

Dc inverter split wall-mounted type

Table of Contents

1. Precaution................................................................................................................................................. 1

1.1 Safety Precaution ................................................................................................................................................ 1

1.2 Warning ............................................................................................................................................................... 1

2. Function .................................................................................................................................................... 4

3. Dimension................................................................................................................................................. 6

3.1 Indoor Unit ........................................................................................................................................................... 6

3.2 Outdoor Unit ........................................................................................................................................................ 7

4. Specification............................................................................................................................................. 9

5. Refrigerant cycle diagram....................................................................................................................... 9

6. Wiring diagram ....................................................................................................................................... 10

6.1 Indoor Unit ......................................................................................................................................................... 10

6.2 Outdoor Unit ...................................................................................................................................................... 10

7. Installation details...................................................................................................................................11

7.1 Wrench torque sheet for installation .................................................................................................................. 12

7.2 Connecting the cables ....................................................................................................................................... 12

7.3 Pipe length and the elevation ............................................................................................................................ 12

7.4 Air purging of the piping and indoor unit ............................................................................................................ 12

7.5 Pumping down (Re-installation)......................................................................................................................... 14

7.6 Re-air purging (Re-installation).......................................................................................................................... 15

7.7 Balance refrigerant of the 2-way, 3-way valves ................................................................................................. 16

7.8 Evacuation......................................................................................................................................................... 20

7.9 Gas charging ..................................................................................................................................................... 21

8. Operation characteristics...................................................................................................................... 19

8.1 MS9A-09HRDN1-QC2....................................................................................................................................... 19

8.2 MS9A-12HRDN1-QC2....................................................................................................................................... 20

9. Electronic function ................................................................................................................................ 21

9.1 Abbreviation ...................................................................................................................................................... 21

9.2 Display function ................................................................................................................................................. 21

9.3 Protection .......................................................................................................................................................... 22

9.4 Fan-Only Mode.................................................................................................................................................. 22

9.5 Cooling Mode .................................................................................................................................................... 23

9.6 Drying mode ...................................................................................................................................................... 24

9.7 Heating mode .................................................................................................................................................... 24

9.8 Auto mode function............................................................................................................................................ 27

9.9 Forced operation function.................................................................................................................................. 28

9.10 Action of 4-way valve....................................................................................................................................... 28

9.11 Two speeds outdoor fan function ..................................................................................................................... 28

9.12 Timer function .................................................................................................................................................. 29

9.13 Sleep function mode........................................................................................................................................ 29

9.14 Auto-Restart function....................................................................................................................................... 29

9.15 Ionizer/Plasma dust collector function(optional) .............................................................................................. 29

9.16 Outdoor chassis heating cable (optional) ........................................................................................................ 29

10. Troubleshooting................................................................................................................................... 30

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