Table Of Contents - Midea MSC-18HRDN1-QC2 Service Manual

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

MSC-18HRDN1-QC2 .......................................................................................................................................... 6

MSH-18HRDN1-QC2 .......................................................................................................................................... 6

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

MOF-18HDN1-QC2 .............................................................................................................................................. 7

4. Specification ............................................................................................................................................. 8

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

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

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

MSC-18HRDN1-QC2

6.2 Outdoor Unit ...................................................................................................................................................... 11

MOF-18HDN1-QC2 ............................................................................................................................................ 11

7. Installation details .................................................................................................................................. 12

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......................................................................................................................................................... 17

7.9 Gas charging ..................................................................................................................................................... 18

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

8.1 MSC-18HRDN1-QC2 ........................................................................................................................................ 19

8.2 MSH-18HRDN1-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

CONTENTS

MSH-18HRDN1-QC2 ............................................................................................. 10