Midea MSV1I-09HRDN1, MSV1I-12HRDN1, M2OA-18HRIN1, M3OA-27HRIN1, M40A-27HRIN1 Schematic

GD Midea Refrigeration Equipment Co.,Ltd

MULTI SPLIT TYPE, HEAT PUMP AIR CONDITIONERS

Technical service manual 2006

R410A Vertu Inverter multi Series

Indoor Models

Outdoor Models

MSV1I-09HRDN1 MSV1I-12HRDN1

M2OA-18HRIN1 M3OA-27HRIN1

M40A-27HRIN1

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1. Product features

2. Dimensions

3. Refrigeration cycle diagram

4. Operation temperature limits

5. Indoor units combination

6. Wiring diagram

7. Wiring connection

8. Electric control functions

9. Troubleshooting

Annex 1 Characteristic of temp. sensor

Annex 2 Reference data

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1 Product Features

1.1 Powerful at cooling/heating.

1.2 Low voltage start-up function.

1.3 Anti-icing function at cooling mode.

1.4 Anti-cold air function at heating mode.

1.5 Auto-defrosting.

1.6 Outdoor electric current protection

1.7 Temperature protection of the outdoor compressor top.

1.8 Error self diagnosis function.

1.9 Free connection between indoor and outdoor unit

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2 Dimensions

2.1 Indoor unit

Dimension

Mode

9K 795 270 165

12K 845 286 165

W H D

2.2 Outdoor unit

a) Outdoor unit M2OA-18HRIN1& M3OA-27HRIN1

335

b) Outdoor unit M4OA-27HRIN1

845

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3 Refrigeration Cycle Diagram

3.1 Refrigeration circuit drawing of inverter quadplex type

4-way valve

Compressor

Exhaust temp. sensor

Axial flow fan

Condenser

Coil temp. sensor

Auxiliary Capillary

Check Valve

Main Capillary

Capillary A

Capillary B

Capillary C

EXV A

EXV B

EXV C

Indoor pipe out temp. seneor A

Indoor pipe out temp. seneor B

Indoor pipe out temp. seneor C

Indoor pipe out temp. seneor D

Outdoor Unit

3.2 Refrigeration circuit drawing of inverter trinary type

Axial

4-way valve

Compressor

Exhaust temp. sensor

flow fan

Condenser

Main Capillary

Coil temp. sensor

Auxiliary Capillary

Check Valve

Capillary A

Capillary B

Capillary C

EXV A

EXV B

EXV C

Indoor pipe out temp. seneor A

Indoor pipe out temp. seneor B

Indoor pipe out temp. seneor C

Filter A

Filter B

Filter C

Filter A

Filter B

Filter C

Liquid valve A

Liquid valve B

Liquid valve C

Liquid valve D

Gas valve A

Gas valve B

Gas valve C

Gas valve D

Liquid valve A

Liquid valve B

Liquid valve C

Gas valve A

Gas valve B

Gas valve C

flow fan

Cross

Evaporator

Indoor Unit

flow fan

Cross

Evaporator

Outdoor Unit

Indoor Unit

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3.2 Refrigeration circuit drawing of inverter binary type

Axial flow fan

Exhaust temp. sensor

4-way valve

Compressor

Condenser

Coil temp. sensor

Outdoor Unit

4 Operation Temperature Limits

Cooling mode

Heating mode

Dry mode

EXVA

EXVB

Indoor pipe out temp. seneor A

Indoor pipe out temp. seneor B

Filter A

Filter B

Liquid valve A

Liquid valve B

Gas valve A

Gas valve B

flow fan

Cross

Main Capillary

Auxiliary Capillary

Check Valve

Capillary A

Capillary B

Indoor Unit

Indoor temperature 17℃～32℃

Outdoor temperature 0℃～50℃

Indoor temperature <=30

Outdoor temperature -15℃～33℃

Indoor temperature 10℃～32℃

Outdoor temperature 0℃～50℃

Evaporator

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5 Indoor units combination

5.1 M2OA-18HRIN1

Indoor units can be combined by 7000Btu/h 9000 Btu/h 12000Btu/h 7000Btu/h+9000 Btu/h 7000Btu/h+12000Btu/h 9000Btu/h+9000 Btu/h 9000Btu/h+12000Btu/h 12000Btu/h+12000Btu/h 12000Btu/h+18000Btu/h 9000Btu/h+18000Btu/h 7000Btu/h+18000Btu/h

5.2 M3OA-27HRIN1

Indoor units can be combined by 7000Btu/h 9000 Btu/h 12000Btu/h 7000Btu/h+9000 Btu/h 7000Btu/h+12000Btu/h 9000Btu/h+9000 Btu/h 9000Btu/h+12000Btu/h 12000Btu/h+12000Btu/h 12000Btu/h+18000Btu/h 9000Btu/h+18000Btu/h 7000Btu/h+18000Btu/h 7000Btu/h*2+9000 Btu/h 7000Btu/h*2+12000 Btu/h 7000Btu/h*2+18000 Btu/h 7000Btu/h*3 9000Btu/h*2+7000 Btu/h 9000Btu/h*2+12000 Btu/h 9000Btu/h*3 12000Btu/h*2+7000 Btu/h 12000Btu/h*2+9000 Btu/h 12000Btu/h+7000Btu/h+9000Btu/h

5.3 M4OA-27HRIN1

Indoor units can be combined by 7000Btu/h 9000 Btu/h 12000Btu/h

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7000Btu/h+9000 Btu/h 7000Btu/h+12000Btu/h 9000Btu/h+9000 Btu/h 9000Btu/h+12000Btu/h 12000Btu/h+12000Btu/h 12000Btu/h+18000Btu/h 9000Btu/h+18000Btu/h 7000Btu/h+18000Btu/h 7000Btu/h*2+9000 Btu/h 7000Btu/h*2+12000 Btu/h 7000Btu/h*2+18000 Btu/h 7000Btu/h*3 9000Btu/h*2+7000 Btu/h 9000Btu/h*2+12000 Btu/h 9000Btu/h*2+18000 Btu/h 9000Btu/h*3 12000Btu/h*2+7000 Btu/h 12000Btu/h*2+9000 Btu/h 12000Btu/h*3 7000Btu/h+9000Btu/h+12000Btu/h 7000Btu/h+9000Btu/h+18000Btu/h 9000Btu/h+9000Btu/h+18000Btu/h 7000Btu/h+12000Btu/h+18000Btu/h 9000Btu/h+12000Btu/h+18000Btu/h 7000Btu/h*2+9000 Btu/h*2 7000Btu/h*2+9000 Btu/h+12000 Btu/h 7000Btu/h*3+9000 Btu/h 7000Btu/h*3+12000 Btu/h 7000Btu/h*3+18000 Btu/h 7000Btu/h*4 9000Btu/h*2+7000 Btu/h+12000 Btu/h 9000Btu/h*3+7000 Btu/h 9000Btu/h*3+12000 Btu/h 97000Btu/h*4

Remark:

1. One, two, three or four indoor units can be connected according your need;

2. As 18000 Btu/h unit, just Cassette and duct are available.

3. There should be no more two duct indoor units and other indoor units should be all wall mounted in a system;

4. There should be no more one cassette and other indoor units should be all wall mounted in a system;

5. Cassette and duct can not be combined in a system;

6. When heating, capacity attenuate sharply if indoor unit capacity exceed too much.

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6. Wiring Diagram

6.1 Indoor unit

6.2 Outdoor unit M2OA-18HRIN1

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