Table Of Contents - Midea MSR1-24HRDN1-QC2W 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 ........................................................................................................................................................ 6

4. Specification ............................................................................................................................................. 7

5. Refrigerant cycle diagram ....................................................................................................................... 8

6. Wiring diagram ......................................................................................................................................... 9

6.1 Indoor Unit ........................................................................................................................................................... 9

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

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

7.1 Wrench torque sheet for installation .................................................................................................................. 11

7.2 Connecting the cables ....................................................................................................................................... 11

7.3 Pipe length and the elevation ............................................................................................................................ 11

7.4 Air purging of the piping and indoor unit ............................................................................................................ 11

7.5 Pumping down (Re-installation) ......................................................................................................................... 13

7.6 Re-air purging (Re-installation) .......................................................................................................................... 14

7.7 Balance refrigerant of the 2-way, 3-way valves ................................................................................................. 15

7.8 Evacuation ......................................................................................................................................................... 16

7.9 Gas charging ..................................................................................................................................................... 17

8. Electronic function ................................................................................................................................ 18

8.1 Abbreviation ...................................................................................................................................................... 18

8.2 Display function ................................................................................................................................................. 18

8.3 Protection .......................................................................................................................................................... 18

8.4 Fan-Only Mode .................................................................................................................................................. 19

8.5 Cooling Mode .................................................................................................................................................... 19

8.6 Drying mode ...................................................................................................................................................... 21

8.7 Heating mode .................................................................................................................................................... 22

8.8 Auto mode function ............................................................................................................................................ 25

8.9 Forced operation function .................................................................................................................................. 25

8.10 Action of 4-way valve ....................................................................................................................................... 25

8.11 Two speeds outdoor fan function ..................................................................................................................... 25

8.12 Timer function .................................................................................................................................................. 26

8.13 Sleep function mode ........................................................................................................................................ 26

8.14 Auto-Restart function ....................................................................................................................................... 26

9. Troubleshooting ..................................................................................................................................... 27

9.1 Indoor Unit Error Display ................................................................................................................................... 28

9.2 Diagnosis and Solution ...................................................................................................................................... 29

9.3 Key parts checking. ........................................................................................................................................... 32

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