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Service Manual
1. Summary
Indoor Unit:
Outdoor Unit:
Part ĉ: Technical Information
GWH18TC-K3DNA1B/I
GWH24TD-K3DNA1B/I
GWH28TD-K3DNA1B/I
Remote Controller:
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GWH24TD-K3DNA1B/O
GWH28TD-K3DNA1B/O
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Model GWH18TC-K3DNA1B
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Power
6XSSO\
Rated Voltage V 220-240
5DWHG)UHTXHQF\ Hz 50
3KDVHV 1
3RZHU6XSSO\0RGH Indoor
Cooling Capacity (Min Max) W 5300
Heating Capacity (Min Max) W 5800
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EER W/W 3.49
COP W/W 3.50
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Operation temp ºC 16~30
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Model GWH24TD-K3DNA1B
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Rated Voltage V 220-240
5DWHG)UHTXHQF\ Hz 50
3KDVHV 1
3RZHU6XSSO\0RGH Indoor
Cooling Capacity (Min Max) W 7000
Heating Capacity (Min Max) W 7600
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COP W/W 3.50
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Rated Voltage V 220-240
5DWHG)UHTXHQF\ Hz 50
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3RZHU6XSSO\0RGH Indoor
Cooling Capacity (Min Max) W 8000
Heating Capacity (Min Max) W 8400
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2.4 Noise Criteria Curve Tables for Both Models
2.2 Operation Characteristic Curve
2.3 Capacity Variation Ratio According to Temperature
Cooling: Heating:
Current(A)
Compressor Speed (rps)
12010080604020
Compressor Speed (rps)
Current(A)
13
11
9
7
5
3
1
12010080604020
13
11
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7
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30
40
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48
50
52
54
56
58
60
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Cooling
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Capacity ratio(%) Capacity ratio(%)
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0
20
40
60
80
100
120
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2.5 Cooling and Heating Data Sheet in Rated Frequency
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in:75~83
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3. Outline Dimension Diagram
3.1 Indoor Unit
Unit:mm
Model W H D
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24/28K 1178 326 264
130 100
50
178 747 253
Φ70 Φ70
144 685 189
55
44
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13
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119
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3.2 Outdoor Unit
Unit:mm
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18K Unit
Unit:mm
340
955
700
396
890
860
364
427
980
920
610
370
790
395

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HEATING
Accumulator
Accumlator
4-Way valve
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Discharge
Suction
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Suction
Heat
exchanger
(evaporator)
Heat
exchanger
(evaporator) Heat
exchanger
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Heat
exchang
(condenser)
Valve
Valve
Valve
Valve
Liquid pipe
side
Gas pipe
side
Liquid pipe
side
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side
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Strainer
Strainer
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5. Electrical Part
5.1 Wiring Diagram
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Symbol Symbol Color Symbol Symbol Color Symbol Name
WH :KLWH GN Green CAP -XPSHUFDS
YE Yellow BN Brown COMP Compressor
RD Red BU %OXH *URXQGLQJZLUH
YEGN Yellow/Green BK %ODFN //
VT Violet OG Orange / /
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2
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L1
L2
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BU
BN
BK
XT
3
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voltage of terminal P(DC+) and N(DC-) at
of electrical shock!
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WARNING
BN:BROWN
BU:BLUE
BK:BLACK RD:RED
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5.2 PCB Printed Diagram
ƔTop view
ƔBottom view
Indoor Unit
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2 DC fan
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9 Display interface
10 -XPSHULQWHUIDFH
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7
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1 Compressor interface
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14 Reactor interface 2
ƔTop view
ƔBottom view
Outdoor Unit