Midea MSV1-09HRDN1, Service Manual

Content 

2 
 
 

Content 

1.

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

1.1

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

1.2

Warning ............................................................................................................................................. 1

2.

Function.............................................................................................................................. 3

3.

Dimension........................................................................................................................... 5

3.1

Indoor unit

（

Vertu

）

.......................................................................................................................... 5

3.2

Outdoor unit

（

Vertu

）

....................................................................................................................... 5

4.

Specification....................................................................................................................... 6

5.

Refrigerant cycle diagram ................................................................................................. 7

6.

Operation limits.................................................................................................................. 8

6.1

Cooling operation............................................................................................................................... 8

6.2

Heating operation .............................................................................................................................. 8

7.

Schematic diagram and Wiring diagram .......................................................................... 9

7.1.

Schematic diagram ............................................................................................................................ 9

7.2.

Wiring diagram ................................................................................................................................ 13

8.

Installation details ............................................................................................................ 14

8.1

Wrench torque sheet for installation ................................................................................................ 14

8.2

Connecting the cables ..................................................................................................................... 14

8.3

Pipe length and the elevation .......................................................................................................... 14

8.4

Air purging of the piping and indoor unit .......................................................................................... 15

8.5

Pumping down (Re-installation) ....................................................................................................... 16

8.6

Re-air purging (Re-installation) ........................................................................................................ 17

8.7

Balance refrigerant of the 2-way, 3-way valves................................................................................ 18

8.8

Evacuation....................................................................................................................................... 19

8.9

Gas charging ................................................................................................................................... 20

9.

Pressure table .................................................................................................................. 21

9.1

MSV1-09HRDN1 ............................................................................................................................. 21

9.2

MSV1-12HRDN1 ............................................................................................................................. 21

10.

Capacity table ................................................................................................................... 22

10.1

MSV1-09HRDN1 ............................................................................................................................. 22

10.2

MSV1-12HRDN1 ............................................................................................................................. 22

11.

Electronic function........................................................................................................... 24

11.1.

Display board................................................................................................................................... 24

11.2.

Protection ........................................................................................................................................ 25

11.3.

Fan-only mode................................................................................................................................. 25

11.4.

Cooling mode .................................................................................................................................. 25

11.5.

Dehumidifying mode ........................................................................................................................ 26

11.6.

Heating mode .................................................................................................................................. 26

11.7.

Defrosting operation (Available for heating only). ............................................................................ 27

11.8.

Outdoor low temperature protection (optional) ................................................................................ 28

11.9.

Automatic operation mode............................................................................................................... 28