1

Service Manual

1. Summary

Part : Technical Information

Indoor Unit

GWH18MC-K3DNA4H/IGWH24MD-K3DNA4H/I

GWH18MC-K3DNA2H/IGWH24MD-K3DNA2H/I

GWH24ME-K3DNA4A/IGWH28ME-K3DNA4H/I

GWH24ME-K3DNA1A/IGWH28ME-K3DNA1H/I

Outdoor Unit:

GWH18MC-K3DNA4H/O(DRED)GWH24MD-K3DNA4H/O(DRED)

GWH24ME-K3DNA3A/O(DRED)GWH28ME-K3DNA4H/O(DRED)

Remote Controller:

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Service Manual

ModelGWH18MC-K3DNA4H(DRED)GWH18MC-K3DNA2H(DRED)

GWH24MD-K3DNA4H(DRED)GWH24MD-K3DNA2H(DRED)

CB161003101CB181003801

CB161003201CB181003901

PowerRated Voltage V~ 220-240 220-240

Hz 50 501 1

Cooling Capacity W 5200 6300Heating Capacity W 5850 6300

W 1590 1930W 1790 1930A 7.05 8.56A 7.94 8.56W 2500 2700A 12.05 11.98

m3 850/780/650/550/- 950/800/700/550/-1.8 2.5

EER W/W 3.27 3.26COP W/W 3.27 3.26SEER W/W / /

W/W / /Application Area m2 23-34 32-50

IndoorUnit

GWH18MC-K3DNA4H/IGWH18MC-K3DNA2H/I

GWH24MD-K3DNA4H/IGWH24MD-K3DNA2H/I

mmr/min 1350/1150/1050/900/- 1350/1150/950/850/-r/min 1420/1250/1150/1050/- 1400/1200/1000/900/-

W 20 35A 0.29 0.31

1.5 2.5W / /

Pipe Diameter mmmm 2-1.4 2-1.5mm

Swing Motor Model MP28VBW 2 2.5A 3.15 5

dB (A) 46/44/40/35/- 51/45/42/39/-dB (A) 56/54/50/55/- 61/55/52/49/-

mmmmmm

13 1616 19.5

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Service Manual

GWH18MC-K3DNA4H/O(DRED) GWH24MD-K3DNA4H/O(DRED)

MITSUBISHIELECTRIC(GUANGZHOU)COMPRESSOR CO.,LTD.

MISUBISHI ELECTRIC/MITSUBISHI ELECTRIC(GUANGZHOU)COMPRESSOR CO., LTD

Compressor ModelCompressor OilCompressor Type Rotary RotaryL.R.A. A 27.00 27Compressor RLA A 8.40 8.4

W 1245±5% 1245±5%INTILL-6578 1NT11L-6578

Capillary CapillaryOperation temp OC 16~30 16~30Ambient temp (Cooling) OC 18~43 18~43Ambient temp (Heating) OC -7~24 -7~24

Pipe Diameter mmmm 1-1.4 2-1.4mmrpm 700 780W 60 60A 0.28 0.28

/ /m3 3200 3200

mm

Climate Type T1 T1Isolation I I

IP24 IP24

MPa 4.3 4.3

MPa 2.5 2.5

dB (A) 56 56dB (A) 66 66

mmmmmm

44 5049 55

Refrigerant R410A R410A1.2 1.9

ConnectionPipe

m 7.5 7.5g/m 20 50mmmmm 10 10m 25 25

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Service Manual

ModelGWH24ME-K3DNA4A(DRED)GWH24ME-K3DNA1A(DRED)

GWH28ME-K3DNA4H(DRED)GWH28ME-K3DNA1H(DRED)

CB161004401CB190001801

CB161003301CB190001701

Rated Voltage V~ 220-240 220-240

Hz 50 50

1 1

Cooling Capacity W 7200 8000

Heating Capacity W 7500 8400

W 2140 2460

W 2300 2550

A 10.08 10.91

A 10.76 11.31

W 3600 3600

A 16.14 15.97

m3 1350/1200/1100/900/- 1200/1100/1000/900/-

2.5 2.7

EER W/W 3.20 3.25COP W/W 3.25 3.29SEER W/W / /

W/W / /Application Area m2 27-42 35-52

Indoor Unit

GWH24ME-K3DNA4A/IGWH24ME-K3DNA1A/I

GWH28ME-K3DNA4H/IGWH28ME-K3DNA1H/I

mm

r/min 1320/1150/1020/920/- 1410/1350/1260/1200/-

r/min 1320/1150/1020/920/- 1410/1350/1260/1200/-

W 25 30A 0.27 0.30

3 3

W / /

Pipe Diameter mmmm 2-1.5 2-1.5mm

Swing Motor Model MP24BA MP24BAW 1.5 1.5A 5 5

dB (A) 51/47/43/40/- 51/48/43/40/-dB (A) 61/57/53/50/- 61/58/53/50/-

mm

mmmm

17.5 17.521.5 21.5

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Service Manual

GWH24ME-K3DNA3A/O(DRED) GWH28ME-K3DNA4H/O(DRED)

MITSUBISHIELECTRIC(GUANGZHOU)COMPRESSOR CO.,LTD/MITSUBISHI ELECTRIC

MISUBISHI ELECTRIC/MITSUBISHI

ELECTRIC(GUANGZHOU)COMPRESSOR CO., LTD.

Compressor ModelCompressor Oil PV50S PV50SCompressor Type Rotary RotaryL.R.A. A 45 45Compressor RLA A 9.7 9.7

W 2200±5% 2200±5%CS-7C-1595 CS-7C-1595

Capillary CapillaryOperation temp OC 16~30 16~30Ambient temp (Cooling) OC 18~43 18~43Ambient temp (Heating) OC -7~24 -7~24

Pipe Diameter mmmm 2-1.4 3-1.5mmrpm 780/500 780W 90 90A 0.79 0.79

7 7m3 4000 4000

mm

Climate Type T1 T1Isolation I I

IP24 IP24

MPa 3.8 4.3

MPa 1.2 2.5

dB (A) 59 59dB (A) 69 69

mmmmmm

65 7073 75

Refrigerant R410A R410A1.8 2.4

ConnectionPipe

m 7.5 7.5g/m 30 50mmmmm 10 10m 30 30

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Service Manual

2.2 Operation Characteristic Curve

Cooling Heating

0 10 20 30 40 50 60 70 90 0 10 20 30 40 50 60 70 80 90 100 12011080

11109876543210

11109876543210

220V

230V

240V

220V

230V

240V

Cur

rent

(A)

Cur

rent

(A)

Conditions coolingIndoor:DB27°C/WB19°COutdoor:DB35°C/WB24°CIndoor air flow:Super HighPipe length:7.5m

Conditions heatingIndoor:DB20°C/WB15°COutdoor:DB7°C/WB6°CIndoor air flow:Super HighPipe length:7.5m

Compressor speed (rps) Compressor speed (rps)

18K:

0 10 20 30 40 50 60 70 90 0 10 20 30 40 50 60 70 80 90 100 12011080

11109876543210

11109876543210

220V

230V

240V

220V

230V

240V

Cur

rent

(A)

Cur

rent

(A)

Conditions heatingIndoor:DB20°C/WB15°COutdoor:DB7°C/WB6°CIndoor air flow:Super HighPipe length:7.5m

Compressor speed (rps) Compressor speed (rps)

Cooling Heating24/28K:

Conditions coolingIndoor:DB27°C/WB19°COutdoor:DB35°C/WB24°CIndoor air flow:Super HighPipe length:7.5m

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Service Manual

2.3 Capacity Variation Ratio According to Temperature

Cooling Heating

)%(oitar

yticapaC

)%(oitar

yticapaC 20

40

60

80

100

120

157-7 -5 0 2 240

-10 5 1032 33 34 35 36 37 38 39 4340 41 42

100105

95908580757065605550

Conditions coolingIndoor:DB27°C/WB19°CIndoor air flow:Super HighPipe length:7.5m

Condition heatin gIndoor:DB20°C/WB15°CIndoor air flow: Super HighPipe length:7.5m

2.4 Cooling and Heating Data Sheet in Rated Frequency

Instruction:

Cooling:

Heating:

Rated cooling condition(°C) (DB/WB) Model

connecting indoor of indoor

Compressor

Indoor P (MPa) T1 (°C) T2 (°C)

27/19 35/24

18K 0.9~1.1in:7~9 in:75~85

73

24(MD)K 0.9~1.1in:8~9 in:75~85

52

24(ME)/28K 0.9~1.1in:7~9 in:75~85

58

condition(°C) (DB/WB) Modelconnecting indoor and

of indoor Compressor

Indoor P (MPa) T1 (°C) T2 (°C)

20/15 7/6

18K 2.2~2.4in:75~85 in:1~3

77

24(MD)K 2.5~2.8in:75~85 in:1~3

56

24(ME)/28K 2.8~3.0in:75~85 in:1~3

89

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Service Manual

2.5 Noise Curve

Indoor side noise

55

45

35

Indoor fan motor rotating speed Compressor frequency/Hz

Low Middle High Super High

60

50

40

30

200 20 40 60 10080

Noi

se/d

B(A)

Noi

se/d

B(A)

18K

28K

24(ME)K

24(MD)K

18K

28K

24(ME)K

24(MD)K

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Service Manual

3. Outline Dimension Diagram3.1 Indoor Unit

19353 694

9831

Φ55X2

45

205117 685

6790

75

Φ70X2

Unit:mm

W

D

H

Models W H D18K 940 298 200

24(MD)K 1007 315 219

24(MD)K

18K

10

Service Manual

Unit:mm

24(ME)/28K

39

253

130100

746

2XΦ70

179

326

1178 253

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Service Manual

890

955

340

700

368

560

396

427980

920

610

370

097

593

3.2 Outdoor Unit

Unit:mm

Unit:mm

GWH18MC-K3DNA4H/O(DRED) GWH24MD-K3DNA4H/O(DRED)

GWH24ME-K3DNA3A/O(DRED) GWH28ME-K3DNA4H/O(DRED)

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Service Manual

4. Refrigerant System Diagram

18K)24/28K)

Indoor unit Outdoor unit

COOLINGHEATING

4-Way valve

Discharge

SuctionHeatexchanger(evaporator) Heat

exchanger(condenser)

Valve

Valve

Liquid pipeside

Gas pipeside

Strainer StrainerCapillary

AccumlatorCompressor

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Service Manual

5. Electrical Part5.1 Wiring Diagram

Symbol Symbol Color Symbol Symbol Color Symbol NameWH GN Green CAPYE Yellow BN Brown COMP Compressor

RD Red BU

YEGN Yellow/Green BK / /

VT Violet OG Orange / /

Models:GWH18MC-K3DNA4H/I GWH24MD-K3DNA4H/I GWH18MC-K3DNA2H/I GWH24MD-K3DNA2H/I

14

Service Manual

RT215

2

3

RT1

Models:GWH24ME-K3DNA4A/I GWH24ME-K3DNA1A/I GWH28ME-K3DNA4H/I GWH28ME-K3DNA1H/I

Model:GWH18MC-K3DNA4H/O(DRED) GWH24MD-K3DNA4H/O(DRED)

15

Service Manual

Models:GWH24ME-K3DNA3A/O(DRED) GWH28ME-K3DNA4H/O(DRED)

16

Service Manual

5.2 PCB Printed DiagramModels:GWH18MC-K3DNA4H/I GWH24MD-K3DNA4H/I GWH18MC-K3DNA2H/I GWH24MD-K3DNA2H/I

1 2 3

4

5

6

789

10

11

12

1 PG motor terminal2

3swing terminal

4fan

5 Interface of display6

7interface

8sensor interface

9

101112

Top view

Bottom view

17

Service Manual

Models:GWH24ME-K3DNA4A/I GWH24ME-K3DNA1A/I GWH28ME-K3DNA4H/I GWH28ME-K3DNA1H/I

3 4 5 76 8 9 10 11

12

13

14

1

2

1

2

3

4

5

67 Low speed89101112 Display interface1314 Display interface

Top view

Bottom view

18

Service Manual

Outdoor Unit

1

2 3 4 5 6 7

8

9

10

11

12

13

14

1 Compressor interface234567

8

9101112 Reactor interface 11314 Reactor interface 2

Models:GWH18MC-K3DNA4H/O(DRED) GWH24MD-K3DNA4H/O(DRED) GWH24ME-K3DNA3A/O(DRED)GWH28ME-K3DNA4H/O(DRED)

Top view

Bottom view

19Installation and Maintenance

Service Manual

1

2

3

4

5

DRED