1

Service Manual

1. SummaryIndoor Unit:

Outdoor Unit:

Part : Technical Information

GWH18TC-K3DNA1B/IGWH24TD-K3DNA1B/IGWH28TD-K3DNA1B/I

Remote Controller:

GWH24TD-K3DNA1B/OGWH28TD-K3DNA1B/O

GWH18TC-K3DNA1B/O

FAN

MODE

ON/OFF

2

Service Manual

Model GWH18TC-K3DNA1B

CB148003100_K96584

PowerRated Voltage V 220-240

Hz 501

IndoorCooling Capacity (Min Max) W 5300Heating Capacity (Min Max) W 5800

Max) W 1520Max) W 1660

A 7.28A 8.09W 2500

A 12.5

m3 950/870/790/710/630/560/480

1.8

EER W/W 3.49

COP W/W 3.50

SEER W/W /

W/W /

Application Area m2 23-34

Indoor Unit

GWH18TC-K3DNA1B/I

CB148N03100_K96584

mm

L/SL)r/min 1250/1150/1050/950/850/750/650

L/SL)r/min 1300/1200/1100/1000/900/800/700

W 25A 0.1

/W /

Pipe Diameter mmmm 2-1.5mm

Swing Motor Model MP28VC/MP35DA/MP24AAW 2/2.5/1.5A 3.15

SL)dB (A) 49/44/41/39/36/33/30

dB (A) 59/54/51/49/46/43/40

mm

mm

mm

16

19

3

Service Manual

OutdoorUnit

GWH18TC-K3DNA1B/OCB148W03100_K96584

MITSUBISHI/MITSUBISHI ELECTRIC (GUANGZHOU)COMP

Compressor Model

Compressor Oil

Compressor Type Rotary

L.R.A. A 27

Compressor RLA A 8.4

W 12451NT11L-6578

CapillaryOperation temp ºC 16~30

Ambient temp (cooling) ºC 16~48

ºC -15~24

Pipe Diameter mm

mm 3-1.4mmrpm 700W 60A /

/

m3 3200

mm

Climate Type T1Isolation I

IP24

MPa 4.3

MPa 2.5

dB (A) 56/-/50dB (A) 66/-/60

mmmmmm

5053

Refrigerant R410A

1.6

ConnectionPipe

m 7.5

g/m 50mmmm

m 10

m 25

4

Service Manual

Model GWH24TD-K3DNA1B

CB148003300_K96584

PowerRated Voltage V 220-240

Hz 50

1

Indoor

Cooling Capacity (Min Max) W 7000

Heating Capacity (Min Max) W 7600

Max) W 2000

Max) W 2170

A 8.87

A 9.63

W 3500

A 15.52

m3 1200/1130/1060/990/920/850/780

2.50

EER W/W 3.50

COP W/W 3.50

SEER W/W /

W/W /

Application Area m2 35-52

Indoor Unit

GWH24TD-K3DNA1B/I

CB148N03300_K96584

mm

M/ML/L/SL)r/min 1400/1300/1200/1100/1000/850/750

M/ML/L/SL)r/min 1400/1300/1200/1100/1000/850/750

W 60

A 0.28

/

W /

Pipe Diameter mm

mm 2-1.5

mm

Swing Motor Model MP35CJ/MP24HB/MP24HC

W 2.5/1.5/1.5

A 3.15

ML/L/SL)dB (A) 51/49/45/43/41/39/36

L/SL)dB (A) 61/59/55/53/51/49/46

mm

mm

mm

18

24

5

Service Manual

OutdoorUnit

GWH24TD-K3DNA1B/OCB148W03300_K96584

MITSUBISHI/MITSUBISHI ELECTRIC (GUANGZHOU)COMP

Compressor ModelCompressor OilCompressor Type RotaryL.R.A. A 45Compressor RLA A 10.63

W 2200CS-7C-1595

CapillaryOperation temp ºC 16~30Ambient temp (cooling) ºC 18~43

ºC -15~24

Pipe Diameter mm

mm 3-1.5

mm

rpm 780

W 90

A 0.28

/

m3 4000

mm

Climate Type T1

Isolation I

IP24

MPa 3.8

MPa 1.2

dB (A) 56/-/50

dB (A) 66/-/60

mm

mm

mm

68

74

Refrigerant R410A

2.3

ConnectionPipe

m 7.5g/m 50mmmmm 10m 25

6

Service Manual

Model GWH28TD-K3DNA1B

CB148003400_K96584

PowerRated Voltage V 220-240

Hz 50

1

Indoor

Cooling Capacity (Min Max) W 8000

Heating Capacity (Min Max) W 8400

Max) W 2390

Max) W 2510

A 10.60

A 11.14

W 4200

A 18.63

m3 1200/1130/1060/990/920/850/780

2.7

EER W/W 3.35

COP W/W 3.35

SEER W/W /

W/W /

Application Area m2 35-52

Indoor Unit

GWH28TD-K3DNA1B/I

CB148N03400_K96584

mm

SL)r/min 1400/1300/1200/1100/1000/850/750

SL)r/min 1400/1300/1200/1100/1000/850/750

W 70

A 0.28

/

W /

Pipe Diameter mm

mm 2-1.5

mm

Swing Motor Model MP35CJ/MP24HB/MP24HC

W 2.5/1.5/1.5

A 3.15

dB (A) 51/49/45/43/41/39/36

dB (A) 61/59/55/53/51/49/46

mm

mm

mm

18

24

7

Service Manual

OutdoorUnit

GWH28TD-K3DNA1B/OCB148W03400_K96584

Gree/ZHUHAI LANDA COMPRESSOR CO,LTD.Compressor ModelCompressor OilCompressor Type RotaryL.R.A. A 40Compressor RLA A 12

W 24501NT11L-6233

CapillaryOperation temp ºC 16~30Ambient temp (cooling) ºC 18~43

ºC -15~24

Pipe Diameter mm

mm 3-1.5

mm

rpm 780

W 90

A 0.28

/

m3 4000

mm

Climate Type T1

Isolation I

IP24

MPa 4.3

MPa 2.5

dB (A) 56/-/50

dB (A) 66/-/60

mm

mm

mm

69

75

Refrigerant R410A

2.4

ConnectionPipe

m 7.5

g/m 50

mm

mm

m 10

m 30

8

Service Manual

2.4 Noise Criteria Curve Tables for Both Models

2.2 Operation Characteristic Curve

2.3 Capacity Variation Ratio According to Temperature

Cooling: Heating:

Cur

rent

(A)

Compressor Speed (rps)12010080604020

Compressor Speed (rps)

Cur

rent

(A)

13

11

9

7

5

3

112010080604020

13

11

9

7

5

3

1

Indoor: DB27°C/WB19°COutdoor: DB35°C/WB24°C

Indoor: DB20°C/WB15°C Outdoor: DB7°C/WB6°C

230V 230V

24/28K

18K

20

30

40

50

SL L ML MHM H SH

Noi

se/d

B(A

)

46

48

50

52

54

56

58

60

20 30 40 50 60 70 80 90 100

Noi

se d

B(A

)

Heating

Cooling

Indoor side noise Outdoor side noise

Cooling Heating

Cap

acity

ratio

(%)

Cap

acity

ratio

(%)

Outdoor Temp.( ) Outdoor Temp.( )

0

20

40

60

80

100

120

-15 -10 17 -5 0 2 5 7 100

20

40

60

80

100

120

5 10 15 20 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46

9

Service Manual

2.5 Cooling and Heating Data Sheet in Rated Frequency

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

connecting indoor and Compressor

(rps)Indoor P (MPa) T1 (°C) T2 (°C)

27/19 35/24 18K 0.9~1.0 in:8~11 in:75~83 75

27/19 35/24 24K 0.9~1.0 in:8~11 in:75~83 75

27/19 35/24 28K 0.9~1.0 in:8~11 in:75~83 80

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

(rps)Indoor P (MPa) T1 (°C) T2 (°C)

20/15 7/6 18K 2.2~2.4 in:75~83 in:1~3 75

20/15 7/6 24K 2.2~2.4 in:75~83 in:1~3 75

20/15 7/6 28K 2.2~2.4 in:75~83 in:1~3 80

Instruction:

Cooling:

Heating:

10

Service Manual

3. Outline Dimension Diagram3.1 Indoor Unit

Unit:mm

Model W H D18K 1018 319 230

24/28K 1178 326 264

130 100

50

178 747 253

Φ70 Φ70

144 685 189

55

44

Φ70

1355

Φ70

119

W

H

D

18K

24/28K

11

Service Manual

3.2 Outdoor Unit

Unit:mm

24/28K Unit

18K Unit

Unit:mm

340955

700

396890

860

364

427980

920

610

370

790

395

12

Service Manual

4. Refrigerant System Diagram(1)Cooling Only Models

(2)Cooling & Heating Models

Indoor unit Outdoor unit

Indoor unit Outdoor unit

COOLINGHEATING

Accumulator

Accumlator

4-Way valve

COOLING

Discharge

Suction

Discharge

Suction

Heatexchanger(evaporator)

Heatexchanger(evaporator) Heat

exchanger(condenser)

Heatexchang(condenser)

Valve

Valve

Valve

Valve

Liquid pipeside

Gas pipeside

Liquid pipeside

Gas pipeside

Compressor

Compressor

Strainer

Strainer

Capillary

StrainerCapillary

13

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 / /

(1) GWH18TC-K3DNA1B/I

LN

32

14

Service Manual

(2) GWH24TD-K3DNA1B/I GWH28TD-K3DNA1B/I

LN

32

15

Service Manual

(1)GWH18TC-K3DNA1B/O

(2)GWH24TD-K3DNA1B/O GWH28TD-K3DNA1B/O

INDO

OR U

NIT

23

L1

L1

L2

AC_LCOM-INNER

N

YEGN

BU

BN

BK

XT

3

2

N(1)

PEYEGN

BKBN

BU

PE

OG:ORANGE

voltage of terminal P(DC+) and N(DC-) at

of electrical shock!AP1 is higher than 30V to prevent the risk

Please don't touch any terminal when the WARNING

BN:BROWNBU:BLUEBK:BLACK RD:RED

YE:YELLOWWH:WHITE

YEGN:YELLOW GREEN

16

Service Manual

5.2 PCB Printed Diagram

Top view

Bottom view

Indoor Unit

12 DC fan3456789 Display interface

101112

13

1415

16

1718

1 2 3 4 5 6 7

8

9

10

11121314

15

16

17

18

17

Service Manual

1 2 3 54 6

7

8

9

10

11

13 1214

1 Compressor interface

2protector

34567

8

9101112 Reactor interface 11314 Reactor interface 2

Top view

Bottom view

Outdoor Unit