Page 1
U-MATCH AIR CONDITIONERS
SERVICE MANUAL
T1/R410A/50Hz
(GC201608 -
І
)
Page 2
CONTENTS
PRODUCT ......................................................................................................................................................... 2
1 MODELS LIST ............................................................................................................................................. 2
1.1 Outdoor Unit ......................................................................................................................................... 2
1.2 Indoor Unit ............................................................................................................................................ 3
2 NOMENCLATURE ...................................................................................................................................... 4
2.1 Outdoor Unit ......................................................................................................................................... 4
2.2 Intdoor Unit ........................................................................................................................................... 4
3 PRODUCT DATA ......................................................................................................................................... 5
3.1 Product Data of Indoor Unit ................................................................................................................. 5
3.2 Operation Range ................................................................................................................................ 13
3.3 Electrical Data .................................................................................................................................... 13
4 PIPING DIAGRAM .................................................................................................................................... 16
CONTROL ....................................................................................................................................................... 18
1 OPERATION FLOWCHART ...................................................................................................................... 18
1.1 Cooling/Dry Operation ....................................................................................................................... 18
1.2 Heating Operation .............................................................................................................................. 19
2 WIRELESS REMOTE CONTROLLER ...................................................................................................... 20
3 WIRED CONTROLLER ............................................................................................................................. 22
3.1 Display View ....................................................................................................................................... 22
3.2 Operation View ................................................................................................................................... 24
4 OPERATION INSTRUCTION OF SPECIAL FUNCTIONS ........................................................................ 27
5 INSTALLATION OF WIRED CONTROLLER ............................................................................................. 27
5.1 Standard Accessories......................................................................................................................... 27
5.2 Installation Position and Requirement ............................................................................................... 27
5.3 Installation of Wired Controller ........................................................................................................... 28
5.4 Removal of Wired Controller .............................................................................................................. 29
6 TROUBLESHOOTING .............................................................................................................................. 29
7 CENTRALIZED CONTROLLER ................................................................................................................ 30
7.1 Smart Zone Controller ........................................................................................................................ 30
7.2 Additional Special Functions .............................................................................................................. 33
INSTALLATION ................................................................................................................................................ 39
1 INDOOR UNIT INSTALLATION ................................................................................................................. 39
1.1 Installation of Duct Type ..................................................................................................................... 39
1.2 Installation of Cassette Type .............................................................................................................. 49
1.3 Installation of Floor Ceiling Type ........................................................................................................ 58
2 OUTDOOR UNIT INSTALLATION ............................................................................................................. 64
2.1 Before Installation .............................................................................................................................. 64
2.2 Installation Site ................................................................................................................................... 64
2.3 Caution for Installation ....................................................................................................................... 65
2.4 Dimension Data .................................................................................................................................. 65
3 REFRIGERATION PIPING WORK ............................................................................................................ 66
3.1 Refrigeration Piping Work Procedures and Caution in Connecting ................................................... 66
3.2 Specification of Connection Pipe ....................................................................................................... 71
4 ELECTRIC WIRING WORK ...................................................................................................................... 72
4.1 Wiring Precautions ............................................................................................................................. 72
4.2 Electrical Wiring ................................................................................................................................. 72
MAINTENANCE ............................................................................................................................................... 81
1 TROUBLE TABLE ..................................................................................................................................... 81
1.1 Main Control Malfunction ................................................................................................................... 81
2 FLOW CHART OF TROUBLESHOOTING ................................................................................................ 83
2.1 Troubleshooting Flow Chart of Main Control Malfunction .................................................................. 83
2.2 Interface ............................................................................................................................................. 89
3 WIRING DIADRAM ................................................................................................................................... 94
3.1 Outdoor unit ....................................................................................................................................... 94
Page 3
3.2 Indoor unit .......................................................................................................................................... 96
4. DISASSEMBLY AND ASSEMBLY PROCEDURE OF MAIN PARTS ........................................................ 99
4.1 Outdoor Unit ....................................................................................................................................... 99
4.2 Indoor Unit ........................................................................................................................................ 104
5 EXPLODED VIEWS AND SPARE PART LIST.......................................................................................... 114
5.1 Outdoor Unit ...................................................................................................................................... 114
5.2 Indoor Unit ........................................................................................................................................ 126
Page 4
U-Match Series Service Manual
PRODUCT
1
Page 5
PRODUCT
Model Name
Product Code
Power Supply
(V, Ph, Hz)
Appearance
GUHN18NK3HO
CF021W2090
220-240V~ 50Hz
GUHN24NK3HO
CF021W2100
220-240V~ 50Hz
GUHN30NK3HO
CF021W2110
220-240V~ 50Hz
GUHN36NM3HO
CF021W2080
380-415V 3N~ 50Hz
GUHN42NM3HO
CF021W2070
380-415V 3N~ 50Hz
GUHN48NM3HO
CF021W2060
380-415V 3N 50Hz
GUHN60NM3HO
CF021W2050
380-415V 3N~ 50Hz
1 MODELS LIST
1.1 Outdoor Unit
U-Match Series Service Manual
2
Page 6
U-Match Series Service Manual
Type
Model Name
Product Code
Nominal Capacity
Cooling/Heating
(kW)
Power
Supply
(V, Ph, Hz)
Appearance
Duct
Type
GFH18K3HI
CF022N0830
5.0/5.4
220-240V~ 50Hz
GFH18K3H1I
CF022N0840
5.0/5.4
220-240V~ 50Hz
GFH24K3HI
CF022N0880
7.0/7.4
220-240V~ 50Hz
GFH24K3H1I
CF022N0870
7.0/7.4
GFH30K3HI
CF022N0850
8.3/8.8
GFH30K3H1I
CF022N0860
8.3/8.8
GFH36K3HI
CF022N0820
10.0/11.5
220-240V~ 50Hz
GFH36K3H1I
CF022N0810
10.0/11.5
GFH42K3HI
CF022N0790
12.0/13.5
GFH42K3H1I
CF022N0800
12.0/13.5
GFH48K3HI
CF022N0770
14.1/15.2
220-240V~ 50Hz
GFH48K3H1I
CF022N0780
14.1/15.2
GFH60K3HI
CF022N0750
16.0/18.0
GFH60K3H1I
CF022N0760
16.0/18.0
Cassette
Type
GKH18K3HI
ET010N1090
5.0/5.4
220-240V~ 50Hz
GKH24K3HI
ET010N1110
7.0/7.6
GKH30K3HI
ET010N1100
8.5/9.0
GKH36K3HI
ET010N1080
10.0/11.5
GKH42K3HI
ET010N1070
12.0/13.5
GKH48K3HI
ET010N1060
14.1/15.0
220-240V~50Hz
GKH60K3HI
ET010N1050
15.0/16.8
Floor-ceiling
Type
GTH18K3HI
ED020N1440
5.5/5.7
220-240V~50Hz
GTH24K3HI
ED020N1450
7.2/8.2
GTH30K3HI
ED020N1460
8.5/9.8
GTH36K3HI
ED020N1420
10.6/11.8
GTH42K3HI
ED020N1470
12.0/13.2
GTH48K3HI
ED020N1430
14.2/16.0
220-240V~50Hz
GTH60K3HI
ED020N1480
15.8/18.2
1.2 Indoor Unit
NOTES:
The universal outdoor units means that the customer can choose any of three kind of indoor unit to
match the outdoor unit without any change with it.
Note:1 Ton =12000Btu/h = 3.517kW
3
Page 7
2 NOMENCLATURE
G U H N 18 N K 3 H
O
1 2 3 4 5 6 7 8 9
10
NO.
Description
Options
1
Gree Electric Appliances Inc
Capital Letter :G 2 Unit Type
U=U-Match Outdoor Unit
3
Product Type
C=Cool Only
H=Heat Pump without Aux Electric Heaters
4
Compressor Power Supply
Type Code
N=Constant Frequency
D=DC Inverter
A=AC Inverter
5
Nominal Cooling Capacity
Nominal Cooling Capacity
=Number×1000Btu/h
6
Climate Type
N=Climate T1 Condition
T= Climate T3 Condition
7
Power Supply Code
K= 220-240V~ 50Hz
M=380-415V 3N~ 50Hz
8
Refrigerant
1 =R22; 2=R407C; 3=R410A
9
Design Code
Design Code: A, B, C, D……
Design Change Code=0 (default)
1,2,3......
10
Unit Code
O=Outdoor unit
G F H
18 T K 3 H
I
1 2 3 4 5 6 7 8 9
NO.
Description
Options
1
Gree Electric Appliances Inc
Capital Letter :G
2
Unit Type
F=Duct Type; K=Cassette Type; T= Floor-ceiling Type
3
Product Type
C=Cool Only
H=Heat Pump without Aux Electric Heaters
4
Nominal Cooling Capacity
Nominal Cooling Capacity
=Number×1000Btu/h
5
Climate Type
Omit=Climate T1 Condition
T= Climate T3 Condition
6
Power Supply Code
K= 220-240V~ 50Hz
M=380-415V 3N~ 50Hz
7
Refrigerant
1 =R22; 2=R407C; 3=R410A
8
Design Code
Design Code: A, B, C, D……
Design Change Code=0 (default)
1,2,3......
9
Unit Code
I=indoor unite
2.1 Outdoor Unit
U-Match Series Service Manual
2.2 Intdoor Unit
4
Page 8
U-Match Series Service Manual
Model
Indoor unit
GFH18K3HI
GFH18K3H1I
GFH24K3HI
GFH24K3H1I
Product Code
CF022N0830
CF022N0840
CF022N0880
CF022N0870
Outdoor unit
GUHN18NK3HO
GUHN18NK3HO
GUHN24NK3HO
GUHN24NK3HO
Product Code
CF021W2090
CF021W2090
CF021W2100
CF021W2100
Capacity
Cooling Capacity
kW
5.0
5.0
7.0
7.0
Heating Capacity
kW
5.4
5.4
7.4
7.4
Power Input
Cooling
kW
2.0
2.0
2.5
2.5
Heating
kW
1.9
1.9
2.3
2.3
EER / COP
W/W
2.5/2.8
2.5/2.8
2.8/3.2
2.8/3.2
Indoor Unit
GFH18K3HI
GFH18K3H1I
GFH24K3HI
GFH24K3H1I
Power Supply - 220-240V~ 50Hz
Heat Exchange
-
Cross Fin Coil
Cross Fin Coil
Cross Fin Coil
Cross Fin Coil
Fan
Drive
-
direct
direct
direct
Direct
Motor Output
kW
0.06×1
0.06×1
0.09×1
0.09×1
Air Flow
m3/h
720
720
1260
1260
Rated Ext. Static Pressure
Pa
25
25
37
37
Ext. Static Pressure Range
Pa
0~30
0~30
0~30
0~30
Sound Pressure Level(SH/H/M/L)
dB(A)
36/33/30/29
36/33/30/29
43/38/34/32
43/38/34/32
Air Filter - Standard washable synthetic
Drain
mm
Φ30×1.5
Φ26×3.0
Φ20×1.2
Φ26×3.0
Outline Dimensions (W×H×D)
mm
1015×720×275
1015×720×275
1260×555×270
1260×555×270
Net Weight
kg
31
32
33
33
Outdoor Unit
GUHN18NK3HO
GUHN18NK3HO
GUHN24NK3HO
GUHN24NK3HO
Power Supply - 220-240V~ 50Hz
Heat Exchange - Cross Fin Coil
Fan
Drive
-
Axial-flow
Motor Output
kW
0.085×1
0.085×1
0.085×1
0.085×1
Fan Motor Speed
rpm
770/640
770/640
770/640
770/640
Compressor
Type
-
Rotary
Rotary
Rotary
Rotary
Power Input
W
1930
1930
2460
2460
Refrigerant
Control - Electronic Expansion Valve
Charge
kg
1.3
1.3
1.5
1.5
Outline Dimensions (W×H×D)
mm
955×395×700
955×395×700
955×395×700
955×395×700
Net Weight
kg
53
53
61
61
Piping
Connections
Liquid
Inch
Φ1/4
Φ1/4
Φ3/8
Φ3/8
Gas
Inch
Φ1/2
Φ1/2
Φ5/8
Φ5/8
Max. Length
m
25
25
30
30
Max. Height
m
15
15
15
15
3 PRODUCT DATA
3.1 Product Data of Indoor Unit
3.1.1 Duct Type
5
Page 9
U-Match Series Service Manual
Model
Indoor unit
GFH30K3HI
GFH30K3H1I
GFH36K3HI
GFH36K3H1I
Product Code
CF022N0850
CF022N0860
CF022N0820
CF022N0810
Outdoor unit
GUHN30NK3HO
GUHN30NK3HO
GUHN36NM3HO
GUHN36NM3HO
Product Code
CF021W2110
CF021W2110
CF021W2080
CF021W2080
Capacity
Cooling Capacity
kW
8.3
8.3
10.0
10.0
Heating Capacity
kW
8.8
8.8
11.5
11.5
Power Input
Cooling
kW
2.8
2.8
3.6
3.6
Heating
kW
2.7
2.7
3.3
3.3
EER / COP
W/W
2.9/3.2
2.9/3.2
2.7/3.4
2.7/3.4
Indoor Unit
GFH30K3HI
GFH30K3H1I
GFH36K3HI
GFH36K3H1I
Power Supply - 220-240V~ 50Hz
Heat Exchange
-
Cross Fin Coil
Cross Fin Coil
Cross Fin Coil
Cross Fin Coil
Fan
Drive
-
direct
direct
direct
Direct
Motor Output
kW
0.15×1
0.15×1
0.20×1
0.20×1
Air Flow
m3/h
1400
1400
2100
2100
Rated Ext. Static Pressure
Pa
37
37
37
37
Ext. Static Pressure Range
Pa
0~50
0~50
0~75
0~75
Sound Pressure Level(SH/H/M/L)
dB(A)
48/46/45/44
48/46/45/44
51/48/46/44
51/48/46/44
Air Filter - Standard washable synthetic
Drain Piping
mm
Φ20×1.2
Φ26×3.0
Φ20×1.2
Φ26×3.0
Outline Dimensions (W×H×D)
mm
1260×555×270
1260×555×270
1230×790×290
1230×790×290
Net Weight
kg
34
35
46
47
Outdoor Unit
GUHN30NK3HO
GUHN30NK3HO
GUHN36NM3HO
GUHN36NM3HO
Power Supply
-
220-240V~ 50Hz
380-415V 3N~ 50Hz
Heat Exchange - Cross Fin Coil
Fan
Drive
-
Axial-flow
Motor Output
kW
0.100×1
0.100×1
0.100×1
0.100×1
Fan Motor Speed
rpm
900/665
900/665
900/665
900/665
Compressor
Type
-
Rotary
Rotary
Rotary
Rotary
Power Input
W
2760
2760
3320
3320
Refrigerant
Control
-
Electronic Expansion Valve
Charge
kg
1.8
1.8
2.2
2.2
Outline Dimensions (W×H×D)
mm
980×425×790
980×425×790
980×425×790
980×425×790
Net Weight
kg
69
69
69
69
Piping
Connections
Liquid
Inch
Φ3/8
Φ3/8
Φ3/8
Φ3/8
Gas
Inch
Φ5/8
Φ5/8
Φ3/4
Φ3/4
Max. Length
m
30
30
30
30
Max. Height
m
15
15
15
15
6
Page 10
U-Match Series Service Manual
Model
Indoor unit
GFH42K3HI
GFH42K3H1I
GFH48K3HI
GFH48K3H1I
Product Code
CF022N0790
CF022N0800
CF022N0770
CF022N0780
Outdoor unit
GUHN42NM3HO
GUHN42NM3HO
GUHN48NM3HO
GUHN48NM3HO
Product Code
CF021W2070
CF021W2070
CF021W2060
CF021W2060
Capacity
Cooling Capacity
kW
12.0
12.0
14.1
14.1
Heating Capacity
kW
13.5
13.5
15.2
15.2
Power Input
Cooling
kW
4.4
4.4
5.0
5.0
Heating
kW
4.1
4.1
4.7
4.7
EER / COP
W/W
2.7/3.3
2.7/3.3
2.8/3.2
2.8/3.2
Indoor Unit
GFH42K3HI
GFH42K3H1I
GFH48K3HI
GFH48K3H1I
Power Supply - 220-240V~ 50Hz
Heat Exchange
-
Cross Fin Coil
Cross Fin Coil
Cross Fin Coil
Cross Fin Coil
Fan
Drive
-
direct
direct
direct
Direct
Motor Output
kW
0.20×1
0.20×1
0.50×1
0.50×1
Air Flow
m3/h
2100
2100
2300
2300
Rated Ext. Static Pressure
Pa
37
37
50
50
Ext. Static Pressure Range
Pa
0~75
0~75
0~100
0~100
Sound Pressure Level(SH/H/M/L)
dB(A)
51/48/46/44
51/48/46/44
53/52/50/50
53/52/50/50
Air Filter Standard washable synthetic
Drain Piping
mm
Φ20×1.2
Φ26×3.0
Φ20×1.2
Φ26×3.0
Outline Dimensions (W×H×D)
mm
1230×790×290
1230×790×290
1230×790×290
1230×790×290
Net Weight
kg
46
47
53
53
Outdoor Unit
GUHN42NM3HO
GUHN42NM3HO
GUHN48NM3HO
GUHN48NM3HO
Power Supply - 380-415V 3N~ 50Hz
Heat Exchange - Cross Fin Coil
Fan
Drive
-
Axial-flow
Motor Output
kW
0.140×1
0.140×1
0.140×1
0.140×1
Fan Motor Speed
rpm
830/630
830/630
830/630
830/630
Compressor
Type
-
Rotary
Rotary
Rotary
Rotary
Power Input
W
4130
4130
4750
4750
Refrigerant
Control
-
Electronic Expansion Valve
Charge
kg
3.3
3.3
3.7
3.7
Outline Dimensions (W×H×D)
mm
1120×440×1100
1120×440×1100
1120×440×1100
1120×440×1100
Net Weight
kg
100
100
103
103
Piping
Connections
Liquid
Inch
Φ1/2
Φ1/2
Φ1/2
Φ1/2
Gas
Inch
Φ3/4
Φ3/4
Φ3/4
Φ3/4
Max. Length
m
50
50
50
50
Max. Height
m
30
30
30
30
7
Page 11
U-Match Series Service Manual
Model
Indoor unit
GFH60K3HI
GFH60K3H1I
Product Code
CF022N0750
CF022N0760
Outdoor unit
GUHN60NM3HO
GUHN60NM3HO
Product Code
CF021W2050
CF021W2050
Capacity
Cooling Capacity
kW
16.0
16.0
Heating Capacity
kW
18.0
18.0
Power Input
Cooling
kW
5.6
5.6
Heating
kW
5.5
5.5
EER / COP
W/W
2.8/3.2
2.8/3.2
Indoor Unit
GFH60K3HI
GFH60K3H1I
Power Supply - 220-240V~ 50Hz
Heat Exchange
-
Cross Fin Coil
Cross Fin Coil
Fan
Drive - direct
Direct
Motor Output
kW
0.50×1
0.50×1
Air Flow
m3/h
2500
2500
Rated Ext. Static Pressure
Pa
50
50
Ext. Static Pressure Range
Pa
0~100
0~100
Sound Pressure Level(SH/H/M/L)
dB(A)
56/52/49/49
56/52/49/49
Air Filter - Standard washable synthetic
Drain Piping
mm
Φ30×1.5
Φ26×3.0
Outline Dimensions (W×H×D)
mm
1235×830×330
1235×830×330
Net Weight
kg
56
56
Outdoor Unit
GUHN60NM3HO
GUHN60NM3HO
Power Supply - 380-415V 3N~ 50Hz
Heat Exchange - Cross Fin Coil
Fan
Drive
-
Axial-flow
Motor Output
kW
0.070×2
0.070×2
Fan Motor Speed
rpm
880/500
880/500
Compressor
Type - Rotary
Rotary
Power Input W 5200
5200
Refrigerant
Control
-
Electronic Expansion Valve
Charge
kg
4.1
4.1
Outline Dimensions (W×H×D)
mm
980×410×1350
980×410×1350
Net Weight
kg
118
118
Piping
Connections
Liquid
Inch
Φ1/2
Φ1/2
Gas
Inch
Φ3/4
Φ3/4
Max. Length m 50
50
Max. Height m 30
30
8
Page 12
U-Match Series Service Manual
Model
Indoor unit
GKH18K3HI
GKH24K3HI
GKH30K3HI
GKH36K3HI
Product Code
ET010N1090
ET010N1110
ET010N1100
ET010N1080
Outdoor unit
GUHN18NK3HO
GUHN24NK3HO
GUHN30NK3HO
GUHN36NM3HO
Product Code
CF021W2090
CF021W2100
CF021W2110
CF021W2080
Capacity
Cooling Capacity
kW
5.0
7.0
8.5
10.0
Heating Capacity
kW
5.4
7.6
9.0
11.5
Power Input
Cooling
kW
2.0
2.5
2.7
3.5
Heating
kW
1.9
2.3
2.6
3.3
EER / COP
W/W
2.5/2.8
2.8/3.3
3.1/3.4
2.8/3.4
Indoor Unit
GKH18K3HI
GKH24K3HI
GKH30K3HI
GKH36K3HI
Power Supply - 220-240V~ 50Hz
Heat Exchange
-
Cross Fin Coil
Cross Fin Coil
Cross Fin Coil
Cross Fin Coil
Fan
Drive
-
direct
direct
direct
Direct
Motor Output
kW
0.03×1
0.04×1
0.04×1
0.06×1
Air Flow
m3/h
720
1450
1500
1650
Sound Pressure Level(SH/H/M/L)
dB(A)
50/49/47/46
49/48/47/46
51/50/49/48
52/47/46/43
Air Filter - Standard washable synthetic
Drain Piping
mm
Φ26×3.0
Φ33×4.0
Φ33×4.0
Φ33×4.0
Outline Dimensions (W×H×D)
mm
665×595×240
840×840×240
840×840×240
840×840×320
Net Weight
kg
20
27
27
32
Outdoor Unit
GUHN18NK3HO
GUHN24NK3HO
GUHN30NK3HO
GUHN36NM3HO
Power Supply
-
220-240V~ 50Hz
380-415V 3N~
50Hz
Heat Exchange - Cross Fin Coil
Fan
Drive
-
Axial-flow
Motor Output
kW
0.085×1
0.085×1
0.100×1
0.100×1
Fan Motor Speed
rpm
770/640
770/640
900/665
900/665
Compressor
Type
-
Rotary
Rotary
Rotary
Rotary
Power Input
W
1930
2460
2760
3320
Refrigerant
Control
-
Electronic Expansion Valve
Charge
kg
1.3
1.5
1.8
2.2
Outline Dimensions (W×H×D)
mm
955×395×700
955×395×700
980×425×790
980×425×790
Net Weight
kg
53
61
69
69
Piping
Connections
Liquid
Inch
Φ1/4
Φ3/8
Φ3/8
Φ3/8
Gas
Inch
Φ1/2
Φ5/8
Φ5/8
Φ3/4
Max. Length
m
25
25
30
30
Max. Height
m
15
15
15
15
3.1.2 Cassette Type
9
Page 13
U-Match Series Service Manual
Model
Indoor unit
GKH42K3HI
GKH48K3HI
GKH60K3HI
Product Code
ET010N1070
ET010N1060
ET010N1050
Outdoor unit
GUHN42NM3HO
GUHN48NM3HO
GUHN60NM3HO
Product Code
CF021W2070
CF021W2060
CF021W2050
Capacity
Cooling Capacity
kW
12.0
14.1
15.0
Heating Capacity
kW
13.5
15.0
16.8
Power Input
Cooling
kW
4.2
4.8
5.3
Heating
kW
4.0
4.9
5.2
EER / COP
W/W
2.8/3.3
2.9/3.0
2.8/3.2
Indoor Unit
GKH42K3HI
GKH48K3HI
GKH60K3HI
Power Supply - 220-240V~50Hz
Heat Exchange
-
Cross Fin Coil
Cross Fin Coil
Cross Fin Coil
Fan
Drive
-
direct
direct
Direct
Motor Output
kW
0.06×1
0.06×1
0.09×1
Air Flow
m3/h
1650
1650
1800
Sound Pressure Level(SH/H/M/L)
dB(A)
52/47/46/43
52/47/46/43
53/51/49/47
Air Filter - Standard washable synthetic
Drain Piping
mm
Φ33×4.0
Φ33×4.0
Φ32×2.0
Outline Dimensions (W×H×D)
mm
840×840×320
840×840×320
840×840×290
Net Weight
kg
32
33
37
Outdoor Unit
GUHN42NM3HO
GUHN48NM3HO
GUHN60NM3HO
Power Supply - 380-415V 3N~ 50Hz
Heat Exchange - Cross Fin Coil
Fan
Drive
-
Axial-flow
Motor Output
kW
0.140×1
0.140×1
0.070×2
Fan Motor Speed
rpm
830/630
830/630
880/500
Compressor
Type
-
Rotary
Rotary
Rotary
Power Input
W
4130
4750
5200
Refrigerant
Control
-
Electronic Expansion Valve
Charge
kg
3.3
3.7
4.1
Outline Dimensions (W×H×D)
mm
1120×440×1100
1120×440×1100
980×410×1350
Net Weight
kg
100
103
118
Piping
Connections
Liquid
Inch
Φ1/2
Φ1/2
Φ1/2
Gas
Inch
Φ3/4
Φ3/4
Φ3/4
Max. Length
m
50
50
50
Max. Height
m
30
30
30
10
Page 14
U-Match Series Service Manual
Model
Indoor unit
GTH18K3HI
GTH24K3HI
GTH30K3HI
GTH36K3HI
Product Code
ED020N1440
ED020N1450
ED020N1460
ED020N1420
Outdoor unit
GUHN18NK3HO
GUHN24NK3HO
GUHN30NK3HO
GUHN36NM3HO
Product Code
CF021W2090
CF021W2100
CF021W2110
CF021W2080
Capacity
Cooling Capacity
kW
5.5
7.2
8.5
10.6
Heating Capacity
kW
5.7
8.2
9.8
11.8
Power Input
Cooling
kW
2.0
2.5
2.8
3.6
Heating
kW
2.0
2.4
2.8
3.6
EER / COP
W/W
2.7/2.8
2.8/3.4
3.0/3.5
2.9/3.2
Indoor Unit
GTH18K3HI
GTH24K3HI
GTH30K3HI
GTH36K3HI
Power Supply - 220-240V~ 50Hz
Heat Exchange
-
Cross Fin Coil
Cross Fin Coil
Cross Fin Coil
Cross Fin Coil
Fan
Drive
-
direct
direct
direct
direct
Motor Output
kW
0.02×1
0.075×1
0.075×1
0.10×1
Air Flow
m3/h
1000
1400
1500
1600
Sound Pressure Level(SH/H/M/L)
dB(A)
40/37/35/33
48/46/44/40
50/48/46/43
52/51/50/49
Air Filter - Standard washable synthetic
Drain Piping
mm
Φ17×1.75
Outline Dimensions (W×H×D)
mm
1200×665×235
Net Weight
kg
31
32
32
36
Outdoor Unit
GUHN18NK3HO
GUHN24NK3HO
GUHN30NK3HO
GUHN36NM3HO
Power Supply
-
220-240V~ 50Hz
380-415V 3N~
50Hz
Heat Exchange - Cross Fin Coil
Fan
Drive
-
Axial-flow
Motor Output
kW
0.085×1
0.085×1
0.100×1
0.100×1
Fan Motor Speed
rpm
770/640
770/640
900/665
900/665
Compressor
Type
-
Rotary
Rotary
Rotary
Rotary
Power Input
W
1930
2460
2760
3320
Refrigerant
Control
-
Electronic Expansion Valve
Charge
kg
1.3
1.5
1.8
2.2
Outline Dimensions (W×H×D)
mm
955×395×700
955×395×700
980×425×790
980×425×790
Net Weight
kg
53
61
69
69
Piping
Connections
Liquid
Inch
Φ1/4
Φ3/8
Φ3/8
Φ3/8
Gas
Inch
Φ1/2
Φ5/8
Φ5/8
Φ3/4
Max. Length
m
25
30
30
30
Max. Height
m
15
15
15
15
3.1.3 Floor ceiling Type
11
Page 15
U-Match Series Service Manual
Model
Indoor unit
GTH42K3HI
GTH48K3HI
GTH60K3HI
Product Code
ED020N1470
ED020N1430
ED020N1480
Outdoor unit
GUHN42NM3HO
GUHN48NM3HO
GUHN60NM3HO
Product Code
CF021W2070
CF021W2060
CF021W2050
Capacity
Cooling Capacity
kW
12.0
14.2
15.8
Heating Capacity
kW
13.2
16.0
18.2
Power Input
Cooling
kW
4.3
5.0
5.50
Heating
kW
4.1
4.7
5.45
EER / COP
W/W
2.8/3.2
2.8/3.4
2.8/3.3
Indoor Unit
GTH42K3HI
GTH48K3HI
GTH60K3HI
Power Supply - 220-240V~50Hz
Heat Exchange
-
Cross Fin Coil
Cross Fin Coil
Cross Fin Coil
Fan
Drive
-
direct
direct
direct
Motor Output
kW
0.1×1
0.26×1
0.26×1
Air Flow
m3/h
1650
2400
2400
Sound Pressure Level(SH/H/M/L)
dB(A)
54/52/51/50
56/55/53/52
56/55/53/52
Air Filter - Standard washable synthetic
Drain Piping
mm
Φ17×1.75
Outline Dimensions (W×H×D)
mm
1200×665×235
1570×665×235
Net Weight
kg
38
46
46
Outdoor Unit
GUHN42NM3HO
GUHN48NM3HO
GUHN60NM3HO
Power Supply - 380-415V 3N~ 50Hz
Heat Exchange - Cross Fin Coil
Fan
Drive
-
Axial-flow
Motor Output
kW
0.140×1
0.140×1
0.070×2
Fan Motor Speed
rpm
830/630
830/630
880/500
Compressor
Type
-
Rotary
Rotary
Rotary
Power Input
W
4130
4750
5200
Refrigerant
Control
-
Electronic Expansion Valve
Charge
kg
3.3
3.7
4.1
Outline Dimensions (W×H×D)
mm
1120×440×1100
1120×440×1100
980×410×1350
Net Weight
kg
100
103
118
Piping
Connections
Liquid
Inch
Φ1/2
Φ1/2
Φ1/2
Gas
Inch
Φ3/4
Φ3/4
Φ3/4
Max. Length
m
50
50
50
Max. Height
m
30
30
30
12
Page 16
U-Match Series Service Manual
Mode
Indoor ℃(℉)
Outdoor ℃(℉)
Cooling
DB:27 (80.6)
DB:35(95)
WB:19 (66.2)
WB:24(75.2)
Heating
DB:20 (68)
DB:7(44.6)
WB:--(--)
WB:6 (42.8)
Piping
Length
Duct type
Cassette type
18-48k：5m
60k：7.5m
Floor ceiling
type
18-30k：5m
36-60k：7.5m
Mode
Range of Outdoor Temperature ℃(℉)
Cooling
-15(5)-43(109.4)
Heating
-15(5)-24(75.2)
Model
Compressor
Fan Motor
Fuse/Breaker
Capacity
Min.
Power
Supply
Cord
Power
Supply
Qty.
RLA
FLA
V/Ph/Hz
− A A A mm2
GUHN18NK3HO
220-240,1,50
1
8.4
<1
5/13
2.5
GUHN24NK3HO
220-240,1,50
1
11.3
<1
5/20
4.0
GUHN30NK3HO
220-240,1,50
1
12.7
<1
5/20
4.0
GUHN36NM3HO
380-415,3,50
1
6.9
<1
5/13
1.5
GUHN42NM3HO
380-415,3,50
1
7.2
<1
5/13
2.5
GUHN48NM3HO
380-415,3,50
1
8.7
<1
5/16
2.5
GUHN60NM3HO
380-415,3,50
1
9.3
<1
5/16
2.5
Note: Nominal capacities are based on the follow conditions.
The air volume is measured at the relevant standard external static pressure.
Noise is tested in the semianechoic room, so it should be slightly higher in the actual operation due
to environmental change.
3.2 Operation Range
3.3 Electrical Data
3.3.1 Outdoor unit
Table 1-4-1 Electrical Data of Outdoor Unit
13
Page 17
3.3.2 Indoor unit
Model
Power
Supply
Fan Motor
FLA
Fuse/Breaker
Capacity
Min. Power
Supply Cord
V/Ph/Hz
A A mm2
GFH18K3HI
220-240,1,50
<1
5/6
1.0
GFH18K3H1I
220-240,1,50
<1
5/6
1.0
GFH24K3HI
220-240,1,50
<1
5/6
1.0
GFH24K3H1I
220-240,1,50
<1
5/6
1.0
GFH30K3HI
220-240,1,50
<1
5/6
1.0
GFH30K3H1I
220-240,1,50
<1
5/6
1.0
GFH36K3HI
220-240,1,50
<1
5/6
1.0
GFH36K3H1I
220-240,1,50
<1
5/6
1.0
GFH42K3HI
220-240,1,50
<1
5/6
1.0
GFH42K3H1I
220-240,1,50
<1
5/6
1.0
GFH48K3HI
220-240,1,50
<1
5/6
1.0
GFH48K3H1I
220-240,1,50
<1
5/6
1.0
GFH60K3HI
220-240,1,50
<1
5/6
1.0
GFH60K3H1I
220-240,1,50
<1
5/6
1.0
GKH18K3HI
220-240,1,50
<1
5/6
1.0
GKH24K3HI
220-240,1,50
<1
5/6
1.0
GKH30K3HI
220-240,1,50
<1
5/6
1.0
GKH36K3HI
220-240,1,50
<1
5/6
1.0
GKH42K3HI
220-240,1,50
<1
5/6
1.0
GKH48K3HI
220-240,1,50
<1
5/6
1.0
GKH60K3HI
220-240,1,50
<1
5/6
1.0
GTH18K3HI
220-240,1,50
<1
5/6
1.0
GTH24K3HI
220-240,1,50
<1
5/6
1.0
GTH30K3HI
220-240,1,50
<1
5/6
1.0
GTH36K3HI
220-240,1,50
<1
5/6
1.0
GTH42K3HI
220-240,1,50
<1
5/6
1.0
GTH48K3HI
220-240,1,50
<1
5/6
1.0
GTH60K3HI
220-240,1,50
<1
5/6
1.0
U-Match Series Service Manual
Table 1-4-2 Electrical Data of Indoor Unit
Notes:
RLA: Rated load amperes
LRA: Locked rotor amperes
FLA: Full load current
Install the disconnect device with a contact gap of at least 3mm in all poles nearby the units
①
(Both indoor unit and outdoor unit).The appliance must be positioned so that the plug is
accessible.
The specifications of the breaker and power cable listed in the table above are determined based
②
on the maximum power (maximum amps) of the unit.
The specifications of the power cable listed in the table above are applied to the conduit-guarded
③
multi-wire copper cable (like, YJV copper cable, consisting of PE insulated wires and a PVC
cable jacket) used at 40°С and resistible to 90°С (see IEC 60364-5-52). If the working condition
changes, they should be modified according to the related national standard.
14
Page 18
U-Match Series Service Manual
The specifications of the breaker listed in the table above are applied to the breaker with the
④
working temperature at 40°С. If the working condition changes, they should be modified
according to the related national standard.
15
Page 19
4 PIPING DIAGRAM
U-Match Series Service Manual
16
Page 20
U-Match Series Service Manual
CONTROL
17
Page 21
CONTROL
1 OPERATION FLOWCHART
1.1 Cooling/Dry Operation
U-Match Series Service Manual
18
Page 22
U-Match Series Service Manual
1.2 Heating Operation
19
Page 23
U-Match Series Service Manual
No.
Name
Function Description
Signal
transmitter
Signal transmitter
ON/OFF
button
Press this button and the unit will be turned on; press it once more and the unit will be turned off.
When turning off the unit, the Sleep function will be canceled, but the presetting time is still
remained.
MODE
button
By pressing this button, Auto, Cool, Dry, Fan, Heat mode can be selected circularly. Auto
mode is default after power on. Under the Auto mode, the setting temperature will not be
displayed; Under the Heat mode, the initial value is 28°C (82°F); under other modes, the initial
value is 25°C (77°F).
AUTO; COOL; DRY; FAN; HEAT (only for cooling and heating unit)
- button
Preset temperature can be decreased by pressing this button. Pressing and holding this button
for more than 2 seconds can make the temperature changed quickly until release this button and
then transmit this order. The temperature adjustment is unavailable under the Auto mode, but
the order can be sent by pressing this button. Centigrade setting range: 16-30; Fahrenheit scale
setting range 61-86.
+ button
Preset temperature can be increased by pressing this button. Pressing and holding this button
for more than 2 seconds can make the temperature changed quickly until release the button and
then transmit this order. The temperature adjustment is unavailable under the Auto mode, but
the order can be sent by pressing this button. Centigrade setting range: 16-30; Fahrenheit scale
setting range 61-86.
2 WIRELESS REMOTE CONTROLLER
2.1 Operation and Display View
Table 2-2-1 Operation instruction of wireless remote controller
20
Page 24
U-Match Series Service Manual
FAN
button
By pressing this button, Auto, Low, Middle, High speed can be circularly selected. After power
on, Auto fan speed is default.
Low speed
Middle speed
High speed
Note: Under the DRY mode, the fan will be kept running at the low speed and the fan speed isn't
adjustable.
SWING
UP/DOW
N button
Press this button to set up the swing angle, which circularly changes as below:
When the guide louver starts to swing up and down, if SWING functions are canceled, the air
guide louver will stop and remains at the current position.
Indicates the guide louver swings up and down among those five directions.(Simplified
SWING function applicable for some Fan Coil Units: When the wireless remote controller is
energized initially with the unit under the OFF status, it should be set by pressing the + button
and the SWING button simultaneously, with the symbol blinking twice. Then, after the unit
is turned on, this function can be activated by pressing the SWING button, with the displayed
symbol indicating swing function is on and without this displayed symbol indicating swing
function is off.)
CLOCK
button
By pressing this button, the clock is allowed to be set, with blinking, and then press the +/-
button to adjust the clock within 5 seconds. If the +/-button is pressed down constantly for more
than 2 seconds, the clock setting will be increased or decreased 10 minutes every 0.5 seconds.
After that, another press on the CLOCK button accepts the setting. 12:00 is the default, when
the wireless remote controller is energized.
TIMER
ON button
When TIMER ON is activated, ON will blink while the symbol will disappear. Within 5
seconds it is allowed to set the ON time by pressing the +/- button. Each press will make the
time increase or decrease one minute. Besides, the time can also be set by pressing the +/button constantly. That is, in the early 2.5 seconds, the time will increase/decrease quickly per
single minute, and in the late 2.5, the time will increase/decrease per ten minutes. After the
desired time value is set, press TIENE ON again to conform the setting within five seconds. After
that, another press on TIMER ON will cancel the setting. Prior to this setting, the clock shall be
set to the actual time.
X-FAN
button
Pressing this button can activate or deactivate the X-FAN function. In Cool or Dry mode, by
pressing this button, if " " is displayed, it indicates the X-FAN function is activated. By
repressing this button, if " " disappears, it indicates the X-FAN function is deactivated. After
energization, X-FAN OFF is defaulted. If the unit is turned off, X-FAN can be deactivated but
can't be activated.
TEMP
button
By pressing this button it is allowed to select displaying the indoor setting temperature or the
indoor ambient temperature.
Indoor setting temperature is default after the indoor unit is energized initially.
By pressing the TEMP button, when the temperature symbol is displayed, the indoor
displayer will show the indoor setting temperature; when is displayed, it will show the
indoor ambient temperature; when is invalidation, If current displays indoor ambient
temperature, if received the other remote control signal, it will display presetting temperature, 5s
later, will back to display the ambient temperature. (This function is applicable to partial of
models)
TIMER
OFF
button
By pressing this button it is available to go to the TIMER OFF setting state with the same setting
method as that of the TIMER ON, in which case the OFF symbol blinks.
21
Page 25
TURBO
button
In the Cool or Heat mode, pressing this button can activate or deactivate the TURBO function.
When the TURBO function is activated, its symbol will be displayed; when the running
mode or the fan speed is changed, this function will be canceled automatically. (This function is
applicable to partial of models).
SLEEP
button
By pressing this button, Sleep On and Sleep Off can be selected. After powered on, Sleep Off is
defaulted. Once the unit is turned off, the Sleep function is canceled. When Sleep is set to on,
the symbol of SLEEP will display. Under the Fan and Auto modes, this function is not
available.
LIGHT
button
Press this button to select LIGHT on or off in the displayer. When the LIGHT is set to on, the icon
will be displayed and the indicating light in the displayer will be on. When the LIGHT is set
to off, the icon will be disappeared and the indicating light in the displayer will be off.
3 WIRED CONTROLLER
3.1 Display View
U-Match Series Service Manual
Figure 2-3-1 Appearance of wired controller
Figure 2-3-2 LCD display of wired controller
22
Page 26
U-Match Series Service Manual
No.
Icons
Introduction
1 Left and right swing function
2 Up and down swing function
3 Air exchange function
4 Sleep function
5 Auto mode
6 COOL mode
7 DRY mode
8 FAN mode
9 HEAT mode
10 Health function
11 I-Demand function
12 Vacation function
13 Status display of master and slave wired controller
14
Shield function
The button operation, temperature setting, "On/Off" operation, "Mode" setting,
and "Save" setting are disabled.
15 Fan speed
16
Memory function
The unit will resume the original setting state after power recovery.
17 Turbo function
18 Energy-saving function
19 Ambient/setting temperature
20 Electric heater
21 Blow function
22 Defrosting function
23 Filter cleaning
24 Timer Setting
25 Keycard control / Detected status sensed by human body
26 Quiet function
27 Lock function
Table 2-3-1 Instruction to LCD Display
23
Page 27
3.2 Operation View
No.
Description
Functions
1
Enter/Cancel
Function selection and canceling;
Press it for 5s to view the ambient temperature; press Mode button to
select viewing outdoor ambient temperature or indoor ambient
temperature.
2
▲
Running temperature setting range of indoor unit: 16-30℃;
Timer setting range: 0.5-24hr;
Setting of air function level;
Setting of energy-saving temperature;
Setting of cleaning class.
6
▼
3
Fan
Setting of high/medium high/medium/medium low/low/auto fan speed.
4
Mode
Setting of auto/cooling/heating/fan/dry mode of indoor unit.
5
Function
Switch over among these functions of swing/air/sleep/health/
I-Demand/out/turbo/save/e-heater/X-fan/clean/quiet.
7
Timer
Timer setting.
8
On/Off
Turn on/off indoor unit.
4 Mode and
2 ▲
Memory function
Press Mode and ▲ buttons at the same time for 5s under off state of the unit
to enter/cancel memory function (If memory function is set, indoor unit will
resume original setting state after power failure and then power recovery. If
not, indoor unit is defaulted to be off after power recovery. Ex-factory setting
of memory function is on).
2 ▲ and
6 ▼
Lock
Upon startup of the unit without malfunction or under off state of the unit,
press ▲ and ▼ buttons at the same time for 5s to enter lock state. In this
case, any other buttons won‟t respond when pressing. Repress ▲ and ▼
buttons for 5s to quit lock state.
4 Mode and
5 Function
Enquiry and
setting of address
of wired controller
Under off state of the unit, press Mode and Function buttons at the same time
for 5s to set the address. (More details please refer to project debugging)
5 Function and
7 Timer
Setting of project
parameters (More
details please
refer to the Notes)
Under off state of the unit, press Function and Timer buttons at the same time
for 5s to go to the debugging menu. Press Mode button to adjust the setting
items and press ▲ or ▼ buttons to set the actual value.
4 Mode and
6 ▼
Switch between
Fahrenheit and
Centigrade
Under off state of the unit, press Mode and ▼ buttons at the same time for 5s
to switch between Fahrenheit and Centigrade.
5 Function and
6 ▼
Viewing historical
malfunction
Continuously press Function and ▼ buttons for 5s to view historical
malfunction. Then press ▲ and ▼ buttons to adjust displayed contents. The
timer displaying position displays the sequence of malfunction and the
detailed error code. The 5th displayed malfunction is the last malfunction.
3.2.1 Silk Screen of Buttons
U-Match Series Service Manual
Figure 2-3-3 Silk screen of buttons
3.3.2 Instruction to Function of Buttons
Table 2-3-2 Instruction to buttons of wired controller
24
Page 28
U-Match Series Service Manual
1 Enter/Cancel
and
4 Mode
Setting of master
and slave wired
controller
Under off state of the unit, press Enter/Cancel and Mode buttons at the same
time for 5s to set master and slave wired controller. Press ▲ or ▼ button to
adjust. (More details please refer to project debugging)
Notes:
The following functions can be set through Function and Timer buttons: setting of ambient
temperature sensor, selecting three speeds in high speed and three speeds in low speed of indoor fan
motor, display setting of freeze protection error code, setting of cold air prevention and hot air hot
prevention function, setting of refrigerant-lacking protection function, selecting of blowing residual heat of
indoor unit, selecting of compressor electric heater mode, selecting of low-power consumption mode,
selecting door control function, selecting human sensitive function, long-distance monitoring,
temperature compensation value at the air return port.
3.2.3 Setting of Wired Controller’s Address
3.2.3.1 Enquiry and Setting of Wired Controller’s Address
Under off state of the unit, press Function and Mode buttons at the same time for 5s to enter setting
interface of wired controller‟s address. In this case, LCD displays address number. Then press▲ or ▼
button to adjust address and then press Enter/Cancel button to confirm. The address setting is related to
the setting of Debugging Function 4.9.10. When the selection in 4.9.10 is 00, address of centralized
controller is to be set and the address setting range is 01~16; when the selection in 4.9.10 is 01, address
of long-distance monitor is to be set and the address setting range is 01~255.
Enquiry and setting of wired controller‟s address is shown as Figure 2-3-4 below:
Figure 2-3-4 Enquiry and setting of wired controller‟s address
25
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U-Match Series Service Manual
3.2.3.2 Setting of Master/Slave Wired Controller’s Address
Under off status of the unit, press Enter/Cancel and Mode buttons at the same time for 5s to go to
the enquiry and setting interface of master/slave wired controller. In this case, LCD displays wired
controller‟s address (01 for master wired controller and 02 for slave wired controller). Press ▲ or ▼
button to adjust address of master/slave wired controller and then press Enter/Cancel button to confirm.
If slave wired controller is set, the icon will be displayed.
Note: If there is only one wired controller, it only can be set as the master; if there are two wired
controllers, one should be the master and the other should be the slave.
Setting of master/slave wired controller‟s address is shown as Figure 2-3-5 below:
Figure 2-3-5 Enquiry and setting of master/slave wired controller‟s address
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U-Match Series Service Manual
Description
Quantity
Note
Socket base box installed in the wall
1
No.1 in Figure 2-5-1
Base plate of wired controller
1
No.2 in Figure 2-5-1
Screw M4×25
2
No.3 in Figure 2-5-1
Panel of wired controller
1
No.4 in Figure 2-5-1
4 OPERATION INSTRUCTION OF SPECIAL FUNCTIONS
4.1 Door Control Function
Door control function can be selected (More details please refer to Debugging Function).
When door control function is selected, the wired controller will work when the room card is inserted
and stop working when the room card is not inserted. When the door control function senses the room
card is not inserted, the wired controller will display icon.
Note:
In long-distance monitoring or centralized control, no matter the room card is inserted or not,
（1）
the ON/OFF of unit can be controlled. If long-distance monitoring or centralized control
information is received when the room card is not inserted, icon is cleared. When the card
is reinserted, door control function is judged to be turned on. If long-distance monitoring or
centralized control information is received when the room card is inserted, it will keep the
original status.
The unit can not be controlled by buttons when the card is not inserted.
（2）
5 INSTALLATION OF WIRED CONTROLLER
5.1 Standard Accessories
Table 2-5-1 Standard Accessories of Wired Controller
5.2 Installation Position and Requirement
(1) Prohibit installing the wired controller at the misty place or the place with direct sunlight.
(2) Prohibit installing the wired controller at the place near high temperature objects or
water-splashing places.
(3) Prohibit installing the wired controller at the place where faces forward to the window, to avoid
interference of another remote controller from neighborhood.
(4) Cut off the power of heavy current wire in the installation hole of the wall. All power should be cut
Figure 2-5-1
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U-Match Series Service Manual
off during installation.
(5) In order to avoid abnormal operation due to electromagnetic interference, etc., pay attention to
the following notes during connecting wires:
1) Make sure the tie-in interface of communication wire is correct, otherwise it may lead to
communication malfunction.
2) The signal wires and communication wires of wired controller should be separated from
power cord and connection wire between indoor unit and outdoor unit.
3) If the air conditioner is installed at the strong electromagnetic interference place, signal wire
and communication wire of wired controller must use shielding twisted wire.
5.3 Installation of Wired Controller
Firstly, the selection and connection way of wired controller‟s signal wire are as below:
(1) Choose suitable signal wire: 2-core signal wire (wire diameter >=0.75mm, wire length<30m and
the recommended length is 8m).
(2) Make sure the power of indoor unit is cut off; fix the signal wire of wired controller on the wiring
board for wired controller of indoor unit with screws; make sure the signal wire is solid.
Then, the detailed installation procedures of wired controller are as shown in Figure 2-5-2:
Figure 2-5-2 Installation of wired controller
Brief instructions of installation procedure:
a) Pull out the 2-core signal wire in the installation hole of the wall and then let this wire go
through the hole at the back of wired controller‟s base plate.
b) Fix the base plate and installation hole of the wall together with screw M4×25.
c) Fix the above mentioned 2-core signal wire on the copper insert X1 and X2 with the
equipped screws of wired controller.
d) Fasten the wired controller‟s panel with its base plate together.
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U-Match Series Service Manual
Number
Error code
Error
Remarks
1
E1
Compressor high pressure protection
2 E2
Indoor anti-freeze protection
3
E3
Compressor low pressure protection, refrigerant lack
protection and refrigerant colleting mode
4
E4
Compressor high discharge temperature protection
5
E6
Communication error
6 E9
Full water protection
7
F0
Indoor ambient temperature sensor error
8
F1
Evaporator temperature sensor error
9 F2
Condenser temperature sensor error
10
F3
Outdoor ambient temperature sensor error
11
F4
Discharge temperature sensor error
12
F5
Temperature sensor error of wired controller
13
H3
Compressor overload protection
14
H4
Overloading
15
U7
4-way valve direction changing protection
16
C4
Outdoor unit capacity code error
17
C5
Indoor unit capacity code error
18
CC
Long-distance monitor or centralized controller has set the
shielding function.
5.4 Removal of Wired Controller
Figure 2-5-3 Removal of wired controller
6 TROUBLESHOOTING
6.1 Display of Error Code
Table 2-6-1 Error Code List
When there is a malfunction during operation, error will be displayed on the temperature displaying
zone of LCD. When several malfunctions occur at the same time, these error codes will be displayed
circularly.
When there is a malfunction, please turn off the unit and ask the professional for maintenance.
For example, E1 means high pressure protection during operation.
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Figure 2-6-1
U-Match Series Service Manual
7 CENTRALIZED CONTROLLER
7.1 Smart Zone Controller
7.1.1 Function
The smart zone controller can directly control up to 16 sets of indoor units in a control network and is
available to check the running status of any unit through the LCD, including running mode, timer, fan
speed, centralized control and shielding setting etc.
7.1.2 Outline Drawing of Press Buttons
Figure 2-7-1
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U-Match Series Service Manual
No.
Name
Function Description
1
Mode
It is used for the switchover among different modes.
2
Fan
It is used to set the fan speed, high, medium, low or auto.
3
On/Off
It is used to set the on/off status of the indoor unit.
4
▲
1. Under the single/centralized control status: It is used to set the running
temperature of the indoor unit with max.30°C anmin.16°C;
2. Under the timing setting status: It is used to set the timing period with max.24
hours and min.0 hour;
3. Under the clock setting status: it is used to set the hour (max.:23, min.: 0) and
minute (max.:59, min.: 0) of the clock.
5
▼
6
Mon 1/9
It is used for the switchover between unit 1 and unit 9;
Under the timing or clock setting status, it indicates Monday.
7
Tue 2/10
It is used for the switchover between unit 2 and unit 10;
Under the timing or clock setting status, it indicates Tuesday.
8
Wed 3/11
It is used for the switchover between unit 3 and unit 11;
Under the timing or clock setting status, it indicates Wednesday.
9
Thu 4/12
It is used for the switchover between unit 4and unit 12;
Under the timing or clock setting status, it indicates Thursday.
10
Fri 5/13
It is used for the switchover between unit 5and unit 13;
Under the timing or clock setting status, it indicates Friday.
11
Sat 6/14
It is used for the switchover between unit 6 and unit 14;
Under the timing or clock setting status, it indicates Saturday.
12
Sun 7/15
It is used for the switchover between unit 7 and unit 15;
Under the timing or clock setting status, it indicates Sunday.
13
8/16
It is used for the switchover between unit 8 and unit 16.
14
Timer/Time
It is used to set the timing or on/off time of the selected indoor unit as well as to set
the clock of the system.
15
Central
It is used for the switchover between single and centralized control modes.
16
Shield
It is used to deactivate some or all functions of a single or a group the indoor unit(s).
17
All on/off
It is used to start/stop all indoor units.
7.1.3 Functions of Press Buttons
Table 2-7-1 Functions of Press Buttons
7.1.4 LCD of the Controller
7.1.4.1 Outline Drawing of the LCD
Figure 2-7-2
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7.1.4.2 Introduction to Symbols on the LCD
No.
Name
Description
1
Fan speed
It displays the fan speed of the indoor unit, high, medium, low and auto.
2
Running mode
It displays the running mode of the indoor unit, auto, cool, dry, fan and heat.
3
System clock
It displays the current time (hour and minute) in 24-hour time system and
also the week day.
4
Shield
It displays the shield status, “ALL‟, “TEMP”, “MODE” and „On/Off”.
5
Weekly timer
It displays the timing period (unit: 0.5 hour) which will circulate every week.
6
Set temperature
Indoor unit code
It displays the set temperature, indoor unit code (01-16), and symbols of
Celsius and Fahrenheit scale.
7
Control mode
It displays “CENTER” under the centralized control mode and no display
under the single control mode.
8
Ambient
temperature
Serial port
It displays the ambient temperature, serial port as well as symbols of Celsius
and Fahrenheit scale.
9
Indoor unit code
On/off status
Numbers indicate the indoor unit codes which will be displayed when the
corresponding indoor unit is online; “” indicates the on/off status of the
indoor unit, its flashing for “on” or else for “off”
10
Error
Child lock
It displays the error codes when some error(s) arises and also “CHILD
LOCK” when this function is activated.
Figure 2-7-3
Table 2-7-2 Introduction to the Symbols on the LCD
U-Match Series Service Manual
7.1.4.3 Network Topology
Network Connection of the Smart Zone Controller
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U-Match Series Service Manual
7.1.4.4 Dimensions
Figure 2-7-5
7.2 Additional Special Functions
7.2.1 Door control function
Door control function is available for this series. In order to achieve this function, please select the
door control accessories from Gree.
(1) Interface instructions
1) The interface printing is DOOR-C and the type is B2B-XH-B. The wires of door control
accessories must be connected to this interface;
2) Electrical characteristic: none;
3) Working principle: when the card is inserted, this interface is short-circuited; when the card is
not inserted, this interface is cut off;
Connect the door control detection port of indoor mainboard with the interface of door control board
(CN1 in the following Figure); connect the door control signal to the door control signal input port (X1 and
X2 in the following Figure). X1 is AC 220V signal input and X2 is DC +5V to 24V. You can only choose
X1 or X2. Definition of interface is as shown in Figure below:
Figure 2-7-6 Illustration of door control port
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U-Match Series Service Manual
No.
Terminal name
Terminal instruction
1
CN1
CN1 wiring terminal and door control interface of indoor mainboard
2
X1(AC-L, AC-N)
X1(AC-L, AC-N) wiring terminal, connected to door control input
signal, rated voltage 220V.
3
X2
X2 wiring terminal, connected to door control input signal
Table 2-7-3 Door control wiring port
(2) Function instructions:
In order to achieve this function, set it through wired controller and refer to the following operation
method. It is defaulted that this function is not activated; if this function is set and door control
accessories are connected, the unit will control the ON/OFF of unit according to the card state detected
by door control detection board. When the card is not connected, the unit will turn to standby state. If the
unit is with wired controller, icon will be displayed on the wired controller.
If the unit is without wired controller, there will be no display. The unit will control the ON/OFF of unit
according to the detected information
.
(3) Setting method:
Under off state of the unit, press Function and Timer buttons at the same time for 5s to go to the
debugging menu. Press Mode button to adjust to “08” in temperature displaying zone. Timer zone
displays setting state and press ▲ or ▼ button to adjust. There are 2 selections:
1) Without door control function (LCD displays 00)
2) With door control function (LCD displays 01)
Choose the second selection and then press Enter/Cancel button to save and exit setting. Now,
door control function is activated. The unit will memorize this setting status. The setting value will be
memorized after power failure. The detailed setting is as shown in the Figure below:
Figure 2-7-7
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U-Match Series Service Manual
7.2.2 MODBUS interface
The indoor unit of this series has MODBUS interface. If the user needs to connect the unit to the
management system of the building, please enquire Gree for the MODBUS protocol.
Figure 2-7-8
(1) Interface instruction:
1) The printing is COM-BMS1 and the interface type is B4B-XH-K3;
2) Electrical characteristic: baud rate: 9600bps; standard: RS485;
3) Working principle:
The indoor mainboard can send out the unit operation state through this interface and receive
logical control information to realize control and monitor of the unit.
(2) Function instructions:
In order to achieve this function, set the address mode and address through wired controller. Please
refer to Point 3 for the setting method. You must set the address mode into long-distance control
address mode.
The address mode is defaulted to be connecting to centralized controller mode and the defaulted
address is 1.
(3) Setting method:
Firstly, set the address mode of wired controller into centralized controller address mode. The
setting method is:
Under off state of the unit, press Function and Timer buttons at the same time for 5s to go to the
debugging menu. Press Mode button to adjust to “10” in temperature displaying zone. Timer zone
displays setting state and press ▲ or ▼ button to adjust. There are 2 selections:
1) Centralized controller address mode (LCD displays 00)
2) Long-distance control address mode (LCD displays 01)
Choose the second selection and then press Enter/Cancel button to save and exit setting. Now, the
address of wired controller is set to match the address of long-distance control. The unit will memorize
this setting status. The setting value will be memorized after power failure. The detailed setting is as
shown in the Figure below:
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U-Match Series Service Manual
Figure 2-7-9
Address setting of each unit: when the address mode is set to be long-distance control address
mode. The address setting value range is 01~255. The setting method is:
Under off state of the unit, press Function and Mode buttons at the same time for 5s to enter setting
interface of wired controller address. LCD displays address sequence. Press ▲ or ▼ button to adjust the
address sequence and then press Enter/Cancel button to confirm. The setting value will be memorized
after power failure. The detailed setting is as shown in the Figure below:
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U-Match Series Service Manual
Figure 2-7-10
Note:
In order to realize the MODBUS interface function, the address mode of the unit must be set into
①
long-distance control address mode; you can not set it into centralized control address mode,
otherwise, this function can not be realized;
The unit can not be connected to MODBUS and centralized controller at the same time; only one
②
of them can be selected;
255 sets of unit in maximum can be connected in the same network; the unit addresses in the
③
same network must be different, otherwise, the unit control will be affected;
Perform wiring when the unit power is cut off.
④
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INSTALLATION
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U-Match Series Service Manual
INSTALLATION
1 INDOOR UNIT INSTALLATION
1.1 Installation of Duct Type
1.1.1 Before Installation
After receiving the machine, please check for any transport damage. If finding any surface or
internal damage, please immediately report to the transport company or equipment company in writing.
After receiving the machine, please check the unit and accessories in reference to the packing list.
Ensure that the model is correct and the machine is in good condition. Please also check if the
specification and quantity of accessory parts are correct.
Determine the correct handling route and methods, thus to avoid damaging the unit or causing
possible hazard. For the sake of protection and safety, it is suggested to move the unit with the
packaging box. Even though it is not permitted to do like this under special occasions, do not remove the
packaging box, thus to avoid loosening or falling during handling.
Confirm if the installing foundation is solid. When this unit is to be installed on the metal section of
the building, make sure that the electrical insulation must comply with applicable standards.
Ensure that the place of installation is far from the area where the inflammable or explosive
substances are stored, thus to avoid possible explosion or fire due to leakage.
1.1.2 Installation Site
Ensure the top hanging piece has strong strength to withstand the weight of the unit.
The drainage pipe has convenient flow of water.
There is no obstacle blocking the return air inlet and exhaust outlet, so as to ensure sound air
circulation.
The installation spaces required by the drawing must be ensured, so as to provide enough space for
the service and maintenance.
The installation site must be far away from heat source, leakage of inflammable gas or smoke.
The indoor unit is of ceiling mount (indoor unit is hidden inside the ceiling).
The indoor and outdoor units, the power cable and the connecting electrical lines must be at least 1
meter from any TV set or radio. This is to avoid image interference or noise of the TV set or radio. (Even
if the distance is 1 meter, noise can also exist if there is strong electric wave.)
1.1.3 Caution for Installation
Generally, the unit is installed indoor on ceiling. For ceiling mounting, ensure that the hangers on
ceiling have adequate strength to support the weight of the unit.
To meet the noise and vibration requirements, the unit shall be installed by using rubber pad
(thickness ≥20mm) and rubber connector.
Insert a M10 expansion bolt into the hole. Drive a nail into the bolt. Refer to the profile dimensions
drawing of the indoor unit for the distance between the holes. Refer to Figure 3-1-1 for the installation of
the expansion bolt.
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U-Match Series Service Manual
Figure 3-1-1 Figure 3-1-2
Figure 3-1-3
Install the hanger onto the indoor unit as Figure 3-1-2 and Figure 3-1-3 shows.
Install the indoor unit at the ceiling as Figure Figure 3-1-4 shows.
Figure 3-1-4
Precautions for unfavorable installation:
The preparation of all pipes (connecting pipes and drainage pipes) and cables (connecting lines of
wire controller, indoor unit and outdoor unit) must be ready before the installation, so as to achieve
smooth installation.
Drill an opening on the ceiling. Maybe it is required to support the ceiling to ensure the evenness of
it and avoid the vibration of it. Consult with the user or a construction company for details.
In case the strength of ceiling is not enough, use angle iron sections to set up a beam support.
Place the unit at the beam and fix it.
Level inspection of the indoor unit
After the indoor unit is installed, it is required to check the level of the whole unit. The unit must be
placed horizontally, but the condensate pipe shall be installed obliquely, so as to facilitate the drainage of
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U-Match Series Service Manual
condensate.
1.1.4 Dimension Data
Figure 3-1-5
For the units: 18K
Figure 3-1-6
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For the units: 24~60K
Item
Model
A B C D E F G H I
J
GFH18K3HI
GFH18K3H1I
940
430
740
738
206
125
1015
275
720
-
GFH24K3HI
GFH24K3H1I
1101
515
820
1159
1260
555
1002
160
235
270
GFH30K3HI
GFH30K3H1I
GFH36K3HI
GFH36K3H1I
1011
748
820
1115
1230
790
979
160
231
290
GFH42K3HI
GFH42K3H1I
GFH48K3HI
GFH48K3H1I
GFH60K3HI
GFH60K3H1I
1011
788
820
1115
1235
830
979
160
256
330
U-Match Series Service Manual
Figure 3-1-7
Table 3-1-1
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U-Match Series Service Manual
Name & Shape
QTY
Notes
Installation and Operating Instructions
1
Insulation materials for gas pipe
1
Used for gas pipe connector on indoor unit
Insulation materials for liquid pipe
1
Used for liquid pipe connector on indoor unit
Insulation materials for drainage pipe
2
Used for wrapping the condensate pipe and rubber plug.
Nut M8 with gasket
8
Use for fixing the hanger hook
4
4 sets, used for ceiling mounting of the indoor unit
Nut and spring gasket
4
Hook
4
Used for ceiling mounting of the indoor unit
Strap
4 or 8 pcs
4 pcs for 18KBtu/h unit and 8 pcs for others
Wired controller
1
Remote controller
1
Battery
2
Fexible pipe
0.2 or 4 pcs
0 pc for 18 KBtu/h unit; 2 pcs for 22.5,27KBtu/h unit; and 4
pcs for 36-45KBtu/h unit
Power cord
1 – 2 pcs
2 pcs for36-45 KBtu/h unit and 1 pc for others
Connection wire
Table 3-1-2 Installation Accessories List for Duct-type Indoor Unit
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1.1.5 Installation Clearance Data
CAUTION!
Install the drain hose in accordance with the instructions in this installation manual and keep the
area warm enough to prevent condensation. Problems with the piping may lead to water leaks.
Figure 3-1-8
Warning: The height of installation for the indoor unit should be 2.5m above.
1.1.6 Drain Piping Work
U-Match Series Service Manual
Installation of Drainage Pipeline:
(1) Install the drain hose with downward gradient (1/50 to 1/100) and no risers or traps are used for
the hose. (Figure 3-1-8)
(2) Be sure there is no crack or leak on the drain hose to avoid the formation of air pocket. (Figure
3-1-8)
(3) When the hose is long, install supporters. (Figure 3-1-9)
(4) Always use the drain hose which has been insulated properly.
Figure 3-1-9
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U-Match Series Service Manual
CAUTION!
Always check that the drain cap is installed to the unused drain port and is fastened with the
nylon fastener. If the drain cap is not installed, or is not sufficiently fastened by the nylon
fastener, water may drip during the cooling operation.
Figure 3-1-13
Figure 3-1-10 Figure 3-1-11
Figure 3-1-12
(5) Use a suitable drain hose, and see Table 3-2-4 for its
size.
(6) There is a drain port on both the left and right sides.
Select the drain port to match the local conditions. (Figure 3-1-11)
(7) When the unit is shipped from the factory, the drain port is
defaulted to be the one on the left side (electric box side); the port on right side has been
plugged.
(8) When using the drain port on the right side of the unit, reinstall the
drain cap to the left side drain port. (Figure 3-1-13)
(9) Be sure to insulate where the drain port and the drain hose is connected. (Figure 3-1-14)
(10) The unused drain port also should be insulated properly. (Figure 3-1-15)
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U-Match Series Service Manual
Figure 3-1-14 Figure 3-1-15
(11) There is adhesive on one side of the insulation so that after removing the protective paper over
it the insulation can be directly attached to the drain hose.
(12) Considerations for the unit with the condensate pump:
1) For the unit with the condensate pump, only one drain port at the side close to the electric
box is prepared and only through it the drain hose can be connected.
2) See table 3 for the size of the drain port of the unit with the condensate pump, which is
different from that of the unit without the condensate pump.
3) For the unit with the condensate pump, two drain ports at the bottom are defaulted to be
factory plugged with drain caps. After the installation of the drain hose, these two drain ports
also need to be insulated properly with the same way aforementioned.
4) The drain hose for the unit with the condensate pump should be arranged as shown in the
figure below.
Figure 3-1-16
a) The vertical height of the drain hose should be 75mm or less so that it is unnecessary for
the drain port to withstand additional force.
Figure 3-1-17
b) When multiple drain hoses are used, their installation should be performed as shown in the
figure below.
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U-Match Series Service Manual
1.1.7 Installation of air duct
Dimensions of the Supply Air Outlet/Return Air Inlet
Figure 3-1-19 Supply Air Outlet
Figure 3-1-18
Figure 3-1-20 Return Air Inlet
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Table 3-1-3
Item
Model
Supply Air Outlet
Return Air Inlet
A B C
D
GFH18K3HI
GFH18K3H1I
123
736
710
166
GFH24K3HI
GFH24K3H1I
158
818
994
195
GFH30K3HI
GFH30K3H1I
158
818
994
195
GFH36K3HI
GFH36K3H1I
158
818
1000
206
GFH42K3HI
GFH42K3H1I
158
818
1000
206
GFH48K3HI
GFH48K3H1I
158
818
1000
206
GFH60K3HI
GFH60K3H1I
190
850
940
286
CAUTION!
①. The maximum length of the duct means the maximum length of the supply air duct plus the maximum length of the
return air duct.
②. The duct is rectangular and connected with the air inlet/outlet of the indoor unit. Among all supply air outlets, at least
one should be kept open.
No.
Name
No.
Name
1
Hanger
5
Filter
2
Air Intake
Pipe
6
Main Air
Supply Pipe
3
Canvas Air
Pipe
7
Air Supply
Outlet
4
Air Intake
1.1.8 Installation of the Supply Air Duct
U-Match Series Service Manual
(1) Installation of the Rectangular Duct.
Figure 3-1-21
(2) The default installation location of the rectangular flange is at the back and the return air cover
plate is at the bottom, as shown in Figure 3-1-22.
Figure 3-1-22
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U-Match Series Service Manual
No.
Name
No.
Name
1
Return Air Inlet (with filter)
4
Indoor unit
2
Canvas Duct
5
Supply Air Duct
3
Return Air Duct
6
Grille
(3) If the bottom return air is desired, just change the place of the rectangular flange and the return
air cover plate.
(4) Connect one end of the return air duct to the return air outlet of the unit by rivets and the other to
the return air louver. For the sake of the convenience to freely adjust the height, a cutting of
canvas duct will be helpful, which can be reinforced and folded by 8# iron wire
(5) More noise is likely to be produced in the bottom return air mode than the backward return air
mode, so it is suggested to install a silencer and a static pressure box to minimize the noise.
(6) The installation method can be chosen with considering the conditions of the building and
maintenance etc., as shown in Figure 3-1-23.
Figure 3-1-23
Table 3-1-4 Installation of the return air duct
1.2 Installation of Cassette Type
1.2.1 Before Installation
After receiving the machine, please check for any transport damage. If finding any surface or
internal damage, please immediately report to the transport company or equipment company in writing.
After receiving the machine, please check the unit and accessories in reference to the packing list.
Ensure that the model is correct and the machine is in good condition. Please also check if the
specification and quantity of accessory parts are correct.
Determine the correct handling route and methods, thus to avoid damaging the unit or causing
possible hazard. For the sake of protection and safety, it is suggested to move the unit with the
packaging box. Even though it is not permitted to do like this under special occasions, do not remove the
packaging box, thus to avoid loosening or falling during handling.
Confirm if the installing foundation is solid. When this unit is to be installed on the metal section of
the building, make sure that the electrical insulation must comply with applicable standards.
Ensure that the place of installation is far from the area where the inflammable or explosive
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U-Match Series Service Manual
Models
H(mm)
GKH18K3HI
240
GKH24K3HI
GKH30K3HI
240
GKH36K3HI
GKH42K3HI
GKH48K3HI
320
GKH60K3HI
290
substances are stored, thus to avoid possible explosion or fire due to leakage.
1.2.2 Installation Site
Select an installation site where the following conditions are fulfilled and that meets your customer's
approval.
(1) Obstruct should be put away from the intake or outlet vent of the indoor unit so that the airflow
can be blown through all the room.
(2) Make sure that the installation meets the requirement of the schematic diagram of installation
spaces.
(3) Select the place where can stand 4 times of the weight of the indoor unit and would not increase
the operating noise and vibration.
(4) The horizontality of the installation place should be guaranteed.
(5) Select the place where is easy to drain out the condensate water, and connect with outdoor unit.
(6) Make sure that there are enough space for care and maintenance, and the height fall between
the indoor unit and ground is above 1800mm.
(7) When installing the suspension bolt, check if the installation place can stand 4 times of the
weight of the unit. If not, reinforce it before installation.
Note: There will be large amount of greasy dirt accumulated on the fan, heat exchanger and water
pump located in the dinning room and kitchen, which would reduce the capacity of the heater exchanger,
lead to leakage and abnormal operation of the water pump.
Figure 3-1-24
Table 3-1-6
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1.2.3 Installing the Main Body Unit
Figure 3-1-25
(1) Install the hoisting stand on the hoisting screw by using nuts and gaskets at both the upper and
lower sides of the hoisting stand. To prevent the gasket from breaking off, a gasket anchor
board can be helpful.
(2) Install the paper template on the unit, and fix the drain pipe at the outlet vent.
(3) Adjust the unit to the best position.
(4) Check if the unit is installed horizontally at four directions. If not, the water pump and the float
switch would function improperly and even lead to water leakage.
(5) Remove the gasket anchor board and tighten the nut remained.
(6). Remove the paper template.
1.2.4 Installing the Suspension Bolts
(1) Using the installation template, drill holes for bolts (four holes). (Figure 3-1-26)
(2) Install the bolts to the ceiling at a place strong enough to hang the unit. Mark the bolt positions
from the installation template. With a concrete drill, drill for 12.7 mm (1/2”) diameter holes.
(Figure 3-1-27)
(3) Insert the anchor bolts into the drilled holes, and drive the pins completely into the anchor bolts
with a hammer. (Figure 3-1-28)
Figure 3-1-26 Figure 3-1-27 Figure 3-1-28
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1.2.5 Leveling
The water level test must be done after installing the indoor unit to make the unit is horizontal, as
shown below.
Figure 3-1-29
1.2.6 The Panel Installation
(1) See the figure below for the relationship of the front panel and the connecting pipe.
Figure 3-1-30
(2) Place the panel at the unit, and latch the hooks beside and opposite the swing flap motor.
(3) Latch other two hooks.
(4) Tighten four hexagonal screws under the latches about 15mm.
(5) Adjust the panel along the direction indicated by the arrow as shown in Figure 3-1-31.
(6) Tighten the screws until the thickness of the sealing material between the panel and the indoor
unit reduces to 5-8cm.
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Figure 3-1-31
(7) Improper screwing of the screws may cause the troubles shown in Figure 3-1-32.
Figure 3-1-32
(8) If gap still exists between ceiling and decoration panel after tightening the screws, readjust the
height of the indoor unit. (Figure 3-1-33)
Figure 3-1-33
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(9) Wire the swing flap motor as shown in Figure 3-1-34.
A
B
C
D
E
F
G
H
I
J
Bottom face of ceiling
Item
Model
A B C D E F G H I
J
GKH18K3HI
670
595
599
562
135
240
665
234
562
491
U-Match Series Service Manual
1.2.7 Dimension Data
For the units: 18k
Figure 3-1-34
Figure 3-1-35
Table 3-1-7
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U-Match Series Service Manual
Item
Model
A B C D E
F
GKH24K3HI
950
840
784
728
135
240
GKH30K3HI
GKH36K3HI
950
840
776
712
134
320
GKH42K3HI
GKH48K3HI
GKH60K3HI
950
840
770
680
134
290
For the units: 24~60K
Figure 3-1-36
Table 3-1-8
1.2.8 Installation of Drain Piping
(1) Keep piping as short as possible and slope it downwards at a gradient of at least 1/100 so that
air may not remain trapped inside the pipe.
(2) Keep pipe size equal to or greater than that of the connecting pipe.
(3) Install the drain piping as shown and take measures against condensation. Improperly rigged
piping could lead to leaks and eventually wet furniture and belongings.
Figure 3-1-37
1.2.9 Installing the Drain Pipes
(1) Insert the drain pipe to the drain outlet of the unit and then tighten the clamp securely with tape.
(2) Connect the extension drain pipe to the drain pipe and then tighten the clamp with tape.
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Tighten the clamp until the screw head is less
then 4 mm from the hose.
①. Metal clamp
②. Drain hose (accessory)
③. Grey tape (accessory)
Insulate the pipe clamp and the drain hose
using heat insulation sponge.
①. Metal clamp (accessory)
②. Insulation sponge (accessory)
(3) When unifying multiple drain pipes, install the pipes as Figure 3-1-38. Select converging drain
pipes whose gauge is suitable for the operating capacity of the unit.(take the cassette type unit
for example)
Figure 3-1-38
(4) When the drain hose cannot keep a sufficient gradient, it is necessary to fit a riser pipe (field
supplied) to it.
(5) If the air flow of indoor unit is high, this might cause negative pressure and result in return
suction of outdoor air. Therefore, U-type water trap shall be designed on the drainage side of
each indoor unit. (Figure 3-1-39)
(6) Install one water trap for each unit.
(7) Installation of water trap shall consider easy cleaning in the future.
Figure 3-1-39 Figure 3-1-40 Figure 3-1-41
(8) Connection of drainage branch pipe to the standpipe or horizontal pipe of drainage main pipe
The horizontal pipe cannot be connected to the vertical pipe at a same height. It can be connected
in a manner as shown below:
NO.1: Attach the 3-way connection of the drainage pipe joint as shown in Figure 3-1-42.
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NO.2: Attach the drain elbow as shown in Figure 3-1-43.
NO.3: Attach the horizontal pipe as shown in Figure 3-1-44.
Figure 3-1-42 Figure 3-1-43 Figure 3-1-44
1.2.10 Precautions When Doing Riser Piping Work
(1) Make sure that heat insulation work is executed on the following 2 spots to prevent any possible
water leakage due to dew condensation.
1) Connect the drain hose to the drain lift pipe, and insulate them.
2) Connect the drain hose to the drain outlet on the indoor unit, and tighten it with the clamp.
Figure 3-1-45
(2) Make sure the lift pipe is at most 280 mm.
(3) Stand the lift pipe vertically, and make sure it is not further than 300 mm from the base of the
drain outlet.
(4) Secure a downward gradient of 1/100 or more for the drain pipe. To accomplish this, mount
supporting brackets at an interval of 1 - 1.5 m.
Figure 3-1-46
(5) The incline of attached drain hose should be 75 mm or less so that the drain outlet does not
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U-Match Series Service Manual
have to withstand additional force.
Figure 3-1-47
1.2.11 Testing of Drain Piping
After piping work is finished, check if drainage flows smoothly. Shown in the Figure 3-1-48, Add
approximately 1liter of water slowly into the drain pan and check drainage flow during COOL running.
Figure 3-1-48
1.3 Installation of Floor Ceiling Type
1.3.1 Before Installation
After receiving the machine, please check for any transport damage. If finding any surface or
internal damage, please immediately report to the transport company or equipment company in writing.
After receiving the machine, please check the unit and accessories in reference to the packing list.
Ensure that the model is correct and the machine is in good condition. Please also check if the
specification and quantity of accessory parts are correct.
Determine the correct handling route and methods, thus to avoid damaging the unit or causing
possible hazard. For the sake of protection and safety, it is suggested to move the unit with the
packaging box. Even though it is not permitted to do like this under special occasions, do not remove the
packaging box, thus to avoid loosening or falling during handling.
Confirm if the installing foundation is solid. When this unit is to be installed on the metal section of
the building, make sure that the electrical insulation must comply with applicable standards.
Ensure that the place of installation is far from the area where the inflammable or explosive
substances are stored, thus to avoid possible explosion or fire due to leakage.
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1.3.2 Installation Site
(1) Install the unit at a place where is strong enough to withstand the weight of the unit.
(2) The air inlet and outlet of the unit should never be clogged so that the airflow can reach every
corner of the room.
(3) Leave service space around the unit as required in Figure 3-1-49.
Figure 3-1-49
(4) Install the unit where the drain pipe can be easily installed.
(5) The space from the unit to the ceiling should be kept as much as possible so as for more
convenient service.
1.3.3 Indoor Unit Installation
(1) Determine the location of the hanger through the paper template, and then remove the paper
template.
Figure 3-1-50
(2) Insert the anchor bolts into the drilled holes, and drive the pins completely into the anchor bolts
with a hammer.
(3) Remove the right and left side panels.
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(4) Put the hanger bolt into the clasp of the indoor unit and tighten screws on the hanger to prevent
the indoor unit from moving.
(5) Adjust the height of the unit to make the drain pipe slant slightly downward so that the drainage
will become much smoother.
Floor type
Ceiling type
Figure 3-1-51
Figure 3-1-52
(6) Reinstall and tighten the right and left side panel.
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Model
A B C D H
GTH18K3HI
1200
235
1142
318
665
GTH24K3HI
GTH30K3HI
GTH36K3HI
GTH42K3HI
GTH48K3HI
1570
235
1512
318
665
GTH60K3HI
1.3.4 Leveling
The water level test must be done after installing the indoor unit to make the unit is horizontal, as
shown below.
Figure 3-1-53
1.3.5 Dimension Data
Figure 3-1-54
Table 3-1-9
Unit: mm
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U-Match Series Service Manual
1.3.6 Drain Piping Work
1.3.6.1 Precautions When Doing the Piping Work
(1) Keep piping as short as possible and slope it downwards at a gradient of at least 1/100 so that
air may not remain trapped inside the pipe.
(2) Keep pipe size equal to or greater than that of the connecting pipe.
(3) Install the drain piping as shown and take measures against condensation. Improperly rigged
piping could lead to leaks and eventually wet furniture and belongings.
Figure 3-1-55
(4) Connect the drain hose. (Figure 3-1-56)
Figure 3-1-56
1.3.6.2 Installing the Drain Pipes
(1) For determining the position of the drain hose, perform the following procedures.
(2) Insert the drain pipe to the drain outlet of the unit and then tighten the clamp securely with tape.
(Figure 3-1-57)
(3) Connect the extension drain pipe to the drain pipe and then tighten the clamp with tape.
Figure 3-1-57 Figure 3-1-58 Figure 3-1-59
Tighten the clamp until the screw head is less than 4 mm from the hose. (Figure 3-1-58)
①- Metal clamp ②- Drain hose
Insulate the pipe clamp and the drain hose using heat insulation sponge. (Figure 3-1-59)
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①- Metal clamp ②- Insulation sponge
(4) When drain hose requires extension, obtain an extension hose commercially available.
(5) After connecting the local drain hose, tape the slits of the heat insulation tube.
(6) Connect the drain hose to the local drain pipe. Position the inter connecting wire in the same
direction as the piping.
1.3.6.3 Connecting the Drain Hose
(1) Connect the extension auxiliary pipe to the local piping.
(2) Prepare the local piping at the connection point for the drain pipe, as shown in the installation
drawings.
Note: Be sure to place the drain hose as shown in the diagram below, in a downward sloping
direction.
Figure 3-1-60
1.2.6.4 Testing of Drain Piping
(1) After piping work is finished, check if drainage flows smoothly.
(2) As shown in the figure, pour water into the drain pan from the right side to check that water flows
smoothly from the drain hose.
Figure 3-1-61
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WARNING
①. Install the unit where it will not be tilted by more than 5°.
②. During installation, if the outdoor unit has to be exposed to strong wind, it must be fixed securely.
2 OUTDOOR UNIT INSTALLATION
2.1 Before Installation
After receiving the machine, please check for any transport damage. If finding any surface or
internal damage, please immediately report to the transport company or equipment company in writing.
After receiving the machine, please check the unit and accessories in reference to the packing list.
Ensure that the model is correct and the machine is in good condition. Please also check if the
specification and quantity of accessory parts are correct.
Determine the correct handling route and methods, thus to avoid damaging the unit or causing
possible hazard. For the sake of protection and safety, it is suggested to move the unit with the
packaging box. Even though it is not permitted to do like this under special occasions, do not remove the
packaging box, thus to avoid loosening or falling during handling.
Confirm if the installing foundation is solid. When this unit is to be installed on the metal section of
the building, make sure that the electrical insulation must comply with applicable standards.
Ensure that the place of installation is far from the area where the inflammable or explosive
substances are stored, thus to avoid possible explosion or fire due to leakage.
2.2 Installation Site
If possible, do not install the unit where it will be exposed to direct sunlight. (If necessary, install a
blind that does not interfere with the air flow.)
(1) Install the outdoor unit in a place where it will be free from being dirty or getting wet by rain as
much as possible.
(2) Install the outdoor unit where it is convenient to connect with the indoor unit.
(3) Install the outdoor unit where the condensate water can be drained out freely during heating
operation.
(4) Do not place animals and plants in the path of the warm air.
(5) Take the air conditioner weight into account and select a place where noise and vibration are
small.
(6) Install the outdoor unit where is capable of withstanding the weight of the unit and generates as
less noise and vibration as possible.
(7) Provide the space shown in Figure 3-2-1, so that the air flow is not blocked. Also for efficient
operation, leave three of four directions of peripheral constructions open.
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Figure 3-2-1
2.3 Caution for Installation
The outdoor unit shall be so installed that the air discharged out of the outdoor unit will not flow back
and that enough space shall be maintained around the machine for repair;
The installing position shall be in good ventilation, so that the machine can breathe and exhaust
enough air. Ensure that there is no obstruction at the inlet and outlet of the machine. If any, please
remove the obstructions blocking the air inlet and outlet.
If the outdoor unit is installed on concrete or solid ground, it shall be fixed by using M10 bolts and
nuts. And ensure that the machine is kept vertical and horizontal.
The outdoor unit must be lifted by using the designated lift hole. During lifting, take care to protect
the air conditioner and avoid knocking the metal parts, thus to prevent rusting in the future.
To meet the noise and vibration requirements, the outdoor unit shall be installed by using rubber
damping pad or spring damper.
To install the drainage pipe, please insert the drainage joint to the drainage hole on the outdoor
chassis and connect a drainage pipe on the drainage joint. (The installing height of outdoor unit shall be
at least 5cm if drainage joint is to be used).
To insert the pipe through the wall, the wall-cross tube must be installed.
The installing dimension shall comply with the installation requirements in these instructions. The
outdoor unit must be fixed at the installing position.
The installation shall be done by specialist technicians.
2.4 Dimension Data
Figure 3-2-2
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U-Match Series Service Manual
Item
Model
A B C D E
GUHN18NK3HO
955
395
700
560
360
GUHN24NK3HO
GUHN30NK3HO
980
425
790
610
395
GUHN36NM3HO
GUHN42NM3HO
1120
440
1100
631
400
GUHN48NM3HO
1120
440
1100
631
400
GUHN60NM3HO
980
410
1350
572
376
Table 3-2-1
Unit: mm
3 REFRIGERATION PIPING WORK
3.1 Refrigeration Piping Work Procedures and Caution in Connecting
3.1.1 Flare Processing
(1) Cut the connection pipe with the pipe cutter and remove the burrs.
(2) Hold the pipe downward to prevent cuttings from entering the pipe.
(3) Remove the flare nuts at the stop valve of the outdoor unit and inside the accessory bag of the
indoor unit, then insert them to the connection pipe, after that, flare the connection pipe with a
flaring tool.
(4) Check if the flare part is spread evenly and there are no cracks (see Figure 3-2-3).
Figure 3-2-3
3.1.2 Bending Pipes
(1) The pipes are shaped by your hands. Be careful not to collapse them.
(2) Do not bend the pipes in an angle more than 90°.
Figure 3-2-4
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Figure 3-2-5
CAUTION!
①. To prevent breaking of the pipe, avoid sharp bends. Bend the pipe with a radius of curvature of 150 mm or over.
②. If the pipe is bent repeatedly at the same place, it will break.
CAUTION!
①. Be sure to apply the pipe against the port on the indoor unit correctly. If the centering is improper, the flare nut
cannot be tightened smoothly. If the flare nut is forced to turn, the threads will be damaged.
②. Do not remove the flare nut until the connection pipe is to be connected so as to prevent dust and impurities from
coming into the pipe system.
(3) When pipes are repeatedly bent or stretched, the material will
harden, making it difficult to bend or stretch them any more.
Do not bend or stretch the pipes more than three times.
(4) When bending the pipe, do not bend it as is. The pipe will be
collapsed. In this case, cut the heat insulating pipe with a sharp
cutter as shown in Figure 3-2-5, and bend it after exposing the
pipe. After bending the pipe as you want, be sure to put the heat insulating pipe back on the pipe,
and secure it with tape.
3.1.3 Connecting the Pipe at the Indoor Unit Side
Detach the caps and plugs from the pipes.
When connecting the pipe to the unit or removing it from the unit, please do use both the spanner
and the torque wrench.( Figure 3-2-6)
When connecting, smear both inside and outside of the flare nut with refrigeration oil, screw it hand
tight and then tighten it with the spanner.
Refer to Table 10 to check if the wrench has been tightened properly (too tight would mangle the nut
and lead to leakage).
Examine the connection pipe to see if it leaks, then take the treatment of heat insulation, as shown
in the Figure 3-2-6.
Use the medium-sized sponge to insulate the coupler of the gas pipe.
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Pipe Diameter
Tightening Torque
1/4〞(Inch)
15-30 (N·m)
3/8〞(Inch)
35-40 (N·m)
1/2〞(Inch)
45-50 (N·m)
5/8〞(Inch
)
60-65 (N·m)
3/4〞(Inch
)
70-75 (N·m)
7/8〞(Inch
)
80-85 (N·m)
CAUTION!
Be sure to connect the gas pipe after connecting the liquid pipe completely.
Figure 3-2-6
Table 3-2-2 Flare nut tightening torque
3.1.4 Connecting the Pipe at the Outdoor Side Unit
Tighten the flare nut of the connection pipe at the outdoor unit valve connector. The tightening
method is the same as that as at the indoor side.
Figure 3-2-2
3.1.5 Checking the Pipe Connections for Gas Leaking
For both indoor and outdoor unit side, check the joints for gas leaking by the use of a gas leakage
detector without fail when the pipes are connected.
3.1.6 Heat Insulation on the Pipe Joints (Indoor Side Only)
Stick coupler heat insulation (large and small) to the place where connecting pipes.
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CAUTION!
Do not purge the air with refrigerants but use a vacuum pump to vacuum the installation! There is no
extra refrigerant in the outdoor unit for air purging!
Figure 3-2-3
3.1.7 Vacuum and Gas Leakage Inspection
3.1.7.1 Vacuum
(1) Remove the caps of the liquid valve, gas valve and also the service port.
(2) Connect the hose at the low pressure side of the manifold valve assembly to the service port of
the unit‟s gas valve, and meanwhile the gas and liquid valves should be kept closed in case of
refrigerant leak.
(3) Connect the hose used for evacuation to the vacuum pump.
(4) Open the switch at the lower pressure side of the manifold valve assembly and start the vacuum
pump. Meanwhile, the switch at the high pressure side of the manifold valve assembly should be
kept closed, otherwise evacuation would fail.
(5) The evacuation duration depends on the unit‟s capacity, generally, 20 minutes for the 18k units,
30 minutes for the 24/30/36k units, 45 minutes for the 42/48/60k units. And verify if the pressure
gauge at the low pressure side of the manifold valve assembly reads -1.0Mp (-75cmHg), if not, it
indicates there is leak somewhere. Then, close the switch fully and then stop the vacuum pump.
(6) Wait for some time to see if the system pressure can remain unchanged, 5 minutes for the
18K~24k units, 10 minutes for the units more than 36K~60k. During this time, the reading of the
pressure gauge at the low pressure side can not be larger than 0.005Mp (0.38cmHg).
(7) Slightly open the liquid valve and let some refrigerant go to the connection pipe to balance the
pressure inside and outside of the connection pipe, so that air will not come into the
connection pipe when removing the hose. Note that the gas and liquid valve can be opened fully
only after the manifold valve assembly is removed.
(8) Place back the caps of the liquid valve, gas valve and also the service port.
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Item
Units
Standard Pipe Length
Unnecessary Charge
Pipe Length
Additional Refrigerant
Amount for Extra Pipe
18k
5.0m
≤
7.0m
18 g/m
24~30k
5.0m
≤
7.0m
54 g/m
36k
Duct type and
Cassette IDU
5.0m
≤
7.0m
54 g/m
Floor ceiling type
IDU
7.5m
≤
9.5m
54 g/m
42~48k
Duct type and
Cassette IDU
5.0m
≤
7.0m
90 g/m
Floor ceiling type
IDU
7.5m
≤
9.5m
90 g/m
60k
7.5m
≤
9.5m
90 g/m
Oil bend
Oil bend
Indoor
Outdoor
6m
Figure 3-2-4
Note: For the large-sized unit, it has the service port for both the gas valve and the liquid valve.
During evacuation, it is available to connect two hoses of the manifold valve assembly to two service
ports to quicken the evacuating speed.
3.1.7.2 Additional Charge
Refrigerant suitable for a piping length of 5m is charged in the 18~42k outdoor unit at the factory,
and for 48~60k outdoor unit refrigerant is charged for a piping length of 7.5m.
When the piping of 18~42k unit is longer than 7.0m or the piping of 48~60k unit is longer than 9.5m,
additional charging is necessary.
For the additional amount, see Table 3-2-3.
Table 3-2-3
When the height difference between the indoor unit and outdoor unit is larger than 10 meters, an oil
bend should be employed for every 6 meters.
Figure 3-2-5
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Item
Model
Size of Fitting Pipe(Inch)
Max. Pipe
Length
(m)
Max. Height Difference
between Indoor Unit and
Outdoor Unit (m)
Drainage pipe(Outer
Diameter × wall thickness)
(mm)
Liquid
Gas
GUHN18NK3HO
1/4
1/2
25
15
Φ16X2.0
GUHN24NK3HO
3/8
5/8
30
15
Φ16X2.0
GUHN30NK3HO
3/8
5/8
30
15
Φ16X2.0
GUHN36NM3HO
3/8
3/4
30
15
Φ16X2.0
GUHN42NM3HO
1/2
3/4
50
30
Φ16X2.0
GUHN48NM3HO
1/2
3/4
50
30
Φ16X2.0
GUHN60NM3HO
1/2
3/4
50
30
Φ16X2.0
3.2 Specification of Connection Pipe
Table 3-2-4
The connection pipe should be insulated with proper water-proof insulating material.
The pipe wall thickness shall be 0.5-1.0 mm and the pipe wall shall be able to withstand the
pressure of 6.0 MPa. The longer the connecting pipe, the lower the cooling and heating effect performs.
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4 ELECTRIC WIRING WORK
WARNING
①. Before obtaining access to terminals, all supply circuits must be disconnected.
②. The rated voltage of the unit is as shown as Table 1-4-1 and Table 1-4-2
③. Before turning on, verify that the voltage is within the 185~264V range (for single phrase unit) or 342~456V range (for
three-phrase unit).
④. Always use a special branch circuit and install a special receptacle to supply power to the air conditioner.
⑤. Use a special branch circuit breaker and receptacle matched to the capacity of the air conditioner.
⑥. The special branch circuit breaker is installed in the permanent wiring. Always use a circuit that can trip all the poles
of the wiring and has an isolation distance of at least 3 mm between the contacts of each pole.
⑦. Perform wiring work in accordance with standards so that the air conditioner can be operated safely and positively.
⑧. Install a leakage special branch circuit breaker in accordance with the related laws and regulations and electric
company standards.
WARNING
①. The power source capacity must be the sum of the air conditioner current and the current of other electrical
appliances. When the current contracted capacity is insufficient, change the contracted capacity.
②. When the voltage is low and the air conditioner is difficult to start, contact the power company to raise the voltage.
4.1 Wiring Precautions
U-Match Series Service Manual
4.2 Electrical Wiring
(1) For solid core wiring (Figure 3-2-6)
1) Cut the wire end with a wire cutter or wire-cutting pliers, and then strip the insulation about
25 mm (15/16").
2) Using a screwdriver, remove the terminal screw(s) on the terminal board.
3) Using pliers, bend the solid wire to form a loop suitable for the terminal screw.
4) Shape the loop wire properly, place it on the terminal board and tighten securely with the
terminal screw using a screwdriver.
(2) For strand wiring (Figure 3-2-6)
1) Cut the wire end with a wire cutter or wire-cutting pliers, and then strip the insulation about
10 mm (3/8").
2) Using a screwdriver, remove the terminal screw (s) on the terminal board.
3) Using a round terminal fastener or pliers, securely clamp a round terminal to each stripped
wire end.
4) Position the round terminal wire, and replace and tighten the terminal screw with a
screwdriver. (Figure 3-2-7)
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WARNING
①. Before starting work, check that power is not being supplied to the indoor unit and outdoor unit.
②. Match the terminal block numbers and connection cord colors with those of the indoor unit side.
③. Erroneous wiring may cause burning of the electric parts.
④. Connect the connection cords firmly to the terminal block. Imperfect installation may cause a fire.
⑤. Always fasten the outside covering of the connection cord with cord clamps. (If the insulator is not clamped, electric
leakage may occur.)
⑥. Always connect the ground wire.
Figure 3-2-6
Figure 3-2-7 Figure 3-2-8
(3) How to fix connection cord and power cord by cord clamp
After passing the connection cord and power cord through the insulation tube, fasten it with the cord
clamp. (Figure 3-2-8)
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(4) Electric wiring between the indoor and outdoor units
GUHN18NK3HO + GFH18K3HI/GFH18K3H1I
①. Power cord 3×2.5 mm2(H07RN-F)
②. Power cord 3×1.0 mm2 (H05VV-F)
③. Communication Cords 2×0.75 mm2 (H05VV-F)
GUHN24NK3HO + GFH24K3HI/GFH24K3H1I
GUHN30NK3HO + GFH30K3HI/GFH30K3H1I
①. Power cord 3×4.0 mm2 (H07RN-F)
②. Power cord 3×1.0 mm2 (H05VV-F)
③. Communication Cords 2×0.75 mm2 (H05VV-F)
GUHN36NM3HO + GFH36K3HI/GFH36K3H1I
①. Power cord 5×1.5 mm2 (H07RN-F)
②. Power cord 3×1.0 mm2 (H05VV-F)
③. Communication Cords 2×0.75 mm2 (H05VV-F)
GUHN42NM3HO + GFH42K3HI/GFH42K3H1I
GUHN48NM3HO + GFH48K3HI/GFH48K3H1I
GUHN60NM3HO + GFH60K3HI/GFH60K3H1I
①. Power cord 5×2.5 mm2 (H07RN-F)
②. Power cord 3×1.0 mm2 (H05VV-F)
③. Communication Cords 2×0.75 mm2 (H05VV-F)
Single-phase units (18~30k)
Duct Type Unit
U-Match Series Service Manual
Three -phase units (36~60k)
Duct Type Unit
Figure 3-2-9
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U-Match Series Service Manual
GUHN18NK3HO + GKH18K3HI
①. Power cord 3×2.5 mm2 (H07RN-F)
②. Power cord 3×1.0 mm2 (H05VV-F)
③. Communication Cords 2×0.75 mm2 (H05VV-F)
GUHN24NK3HO + GKH24K3HI
GUHN30NK3HO + GKH30K3HI
①. Power cord 3×4.0 mm2 (H07RN-F)
②. Power cord 3×1.0 mm2 (H05VV-F)
③. Communication Cords 2×0.75 mm2 (H05VV-F)
Single-phase units 18k
Single-phase units (24~30k)
Casssete Type Unit
Three -phase units (36~60k)
Casssete Type Unit
Casssete Type Unit
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GUHN36NM3HO + + GKH36K3HI
①. Power cord 5×1.5 mm2 (H07RN-F)
②. Power cord 3×1.0 mm2 (H05VV-F)
③. Communication Cords 2×0.75 mm2 (H05VV-F)
GUHN42NM3HO + GKH42K3HI
GUHN48NM3HO + GKH48K3HI
GUHN60NM3HO + GKH60K3HI
①. Power cord 5×2.5 mm2 (H07RN-F)
②. Power cord 3×1.0 mm2 (H05VV-F)
③. Communication Cords 2×0.75 mm2 (H05VV-F)
Single-phase units (18~30k)
GUHN18NK3HO+GTH18K3HI
①. Power cord 3×2.5mm2(H07RN-F)
②. Power cord 3×1.0mm2(H05RN-F)
③. Communication Cords 2×0.75mm2(H05RN-F)
GUHN24NK3HO+GTH24K3HI
GUHN30NK3HO+GTH30K3HI
①. Power cord 3×4.0mm2(H07RN-F)
②. Power cord 3×1.0mm2 (H05RN-F)
③. Communication Cords 2×0.75mm2 (H05RN-F)
GUHN36NM3HO+GTH36K3HI
①. Power cord 5×1.5mm2 (H07RN-F)
②. Power cord 3×1.0mm2 (H05RN-F)
③. Communication Cords 2×0.75mm2 (H05RN-F)
U-Match Series Service Manual
Figure 3-2-10
Floor Ceiling Type Unit
Three-phase units (36~60k)
Floor Ceiling Type Unit
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U-Match Series Service Manual
GUHN42NM3HO+GTH42K3HI
GUHN48NM3HO+GTH48K3HI
GUHN60NM3HO+GTH60K3HI
①. Power cord 5×2.5mm2 (H07RN-F)
②. Power cord 3×1.0mm2(H05RN-F)
③. Communication Cords 2×0.75mm2(H05RN-F)
L
N
1
2
H1
H2
Figure 3-2-11
(5) Electric wiring of indoor unit side
Remove the electric box cover from the electric box sub-assy and then connect the wire.
Duct Type Unit：
Cassette Type Unit：
Floor Ceiling Type Unit：
Figure 3-2-12
Figure 3-2-13
Figure 3-2-14
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U-Match Series Service Manual
CAUTION!
①. The power cord and the wire of the fresh air valve are high-voltage, while the communication cord and connection
wire of the wired controller are low-voltage. They should run separately against electromagnetic interference.
②. The high-voltage and low-voltage lines should pass through the rubber rings at different electric box covers.
③. Do not bundle the connection wire of the wired controller and the communication cord together, or arrange them in
parallel, otherwise improper operation would occur.
④. The high-voltage and low-voltage lines should be fixed separately and securely, with internal big clamps for the former
and small clamps for the latter.
⑤. Tighten the indoor/outdoor connection cord and power cord respectively on the terminal boards with screws. Faulty
connection may cause a fire.
⑥. If the indoor unit connection cord (to the outdoor unit) and power supply are wired incorrectly, the air conditioner may
be damaged.
⑦. Connect the indoor unit connection cord properly based on the corresponding marks as shown in Figure 3-2-9.
⑧. Ground both the indoor and outdoor units by attaching a ground wire.
⑨. Unit shall be grounded in compliance with the applicable local and national codes.
(6) Electric wiring of outdoor unit side
Note: When connecting the power supply cord, make sure that the phase of the power supply
matches with the exact terminal board. If not, the compressor will rotate reversely and run improperly.
Remove the big handle (18k~30k) /front board (36k~60k) of the outdoor unit and insert the end of
the communication cord and the power cable into the terminal board.
Single phase:
Figure 3-2-13
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U-Match Series Service Manual
Three-phase:
Figure 3-2-14
79
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MAINTENANCE
80
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U-Match Series Service Manual
No.
Error
code
Malfunction
name
Origin of
malfunction
signal
Control description
1
E1
High pressure
protection
High pressure
switch
When outdoor unit detects the high pressure switch is cut off for 3s
successively, high pressure protection will occur. All the loads (except
the 4-way valve in heating mode) will be switched off. In this case, all
the buttons and remote control signals except ON/OFF button will be
disabled and cannot be recovered automatically. Switch off the unit or
re-energize the unit after cutting off power to eliminate this protection.
2
E2
Freeze
protection
Indoor
evaporator
temperature
sensor
If detecting that the evaporator temperature is lower than protective
temp. Value after the unit has been running for a period of time under
cooling or dry mode, the unit will report this fault, in which case the
compressor and outdoor fan motor will be stopped. The unit will not run
until evaporator temperature is higher than the protective temp. value
and the compressor is stopped for 3min.
3
E3
Low pressure
protection
Low pressure
switch
If it is detected within 30s successively that the low-pressure switch is
cut off under ON or standby state, the unit will report low pressure
protection. If the fault occurs successively 3 times within 30min, the unit
cannot be recovered automatically.
Refrigerant
lacking
protection
-
If the unit reports system refrigerant lacking within 10min after turning
on the unit, the unit will stop operation. If the fault occurs successively 3
times, the unit cannot be recovered automatically.
Refrigerant
recycling mode
-
If enter refrigerant recycling mode through special operation, E3 will be
displayed. After exiting refrigerant recycling mode, the code will
disappear.
4
E4
Compressor
high discharge
temperature
protection
Compressor
discharge
temperature is
high
If outdoor unit detects that the discharge temperature is higher than
protective temp. Value, the unit will report high discharge temperature
protection. If the protection occurs over 6 times, the unit cannot be
recovered automatically. Switch off the unit or re-energize the unit after
cutting off power to eliminate this protection.
6
E6
Communicatio
n malfunction
Communicatio
n between
indoor and
outdoor
mainboard
If the outdoor unit does not receive data from indoor unit,
communication malfunction will be reported. If there is communication
abnormity between display board and indoor unit, communication
malfunction will be reported too.
9
E9
Full water
protection
Water level
switch
If cut-off of water level switch is detected for 8s successively once
energized, the system will enter full water protection. In this case,
switch off the unit and then switch it on to eliminate this malfunction.
10
F0
Malfunction of
indoor ambient
temperature
sensor at air
return port
Indoor ambient
temperature
sensor
If the indoor ambient temperature sensor is detected of open circuit or
short circuit for 5s successively, indoor ambient temperature sensor
malfunction will be reported. The unit can automatically resume
operation after the malfunction disappears. If indoor ambient
temperature sensor malfunction occurs in fan mode, only the error code
is displayed and the indoor unit can work normally.
11
F1
Malfunction of
evaporator
temperature
sensor
Evaporator
temperature
sensor
If the indoor evaporator temperature sensor is detected of open circuit
or short circuit for 5s successively, evaporator temperature sensor
malfunction will be reported. The unit can automatically resume
operation after the malfunction disappears. If evaporator temperature
sensor malfunction occurs in fan mode, only the error code is displayed
and the indoor unit can work normally.
12
F2
Malfunction of
condenser
temperature
sensor
Condenser
temperature
sensor
If the outdoor condenser temperature sensor is detected of open circuit
or short circuit for 5s successively, condenser temperature sensor
malfunction will be reported. The unit can automatically resume
operation after the malfunction disappears. If condenser temperature
sensor malfunction occurs in fan mode, only the error code is displayed
and the indoor unit can work normally.
MAINTENANCE
1 TROUBLE TABLE
1.1 Main Control Malfunction
Table 1 Fault Display on Indoor Wired Controller
81
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No.
Error
code
Malfunction
name
Origin of
malfunction
signal
Control description
13
F3
Malfunction of
outdoor
ambient
temperature
sensor
Outdoor
ambient
temperature
sensor
If the outdoor ambient temperature sensor is detected of open circuit or
short circuit for 5s successively, outdoor ambient temperature sensor
malfunction will be reported. The unit can automatically resume
operation after the malfunction disappears. If outdoor ambient
temperature sensor malfunction occurs in fan mode, only the error code
is displayed and the indoor unit can work normally.
14
F4
Malfunction of
discharge
temperature
sensor
Discharge
temperature
sensor
If the outdoor discharge temperature sensor is detected of open circuit
or short circuit for 5s successively after the compressor has been
operating for 3min, outdoor discharge temperature sensor malfunction
will be reported. The unit can automatically resume operation after the
malfunction disappears.
15
F5
Malfunction
wired controller
temperature
sensor
Wired
controller
If the wired controller detects open circuit or short circuit of its
temperature sensor for 5s successively, wired controller temperature
sensor malfunction will be reported.
20
H3
Compressor
overload
protection
Compressor
overload switch
If it is detected within 3s successively that the overload switch is cut off
under ON or standby state, the unit will report overload protection. If the
fault occurs successively 3 times, the unit cannot be recovered
automatically. Switch off the unit or re-energize the unit after cutting off
power to eliminate this protection.
21
H4
Overload
protection
Evaporator
temperature,
condenser
temperature
If outdoor unit detects that the tube temperature is higher than
protective temp. Value, the unit will report overload protection. The unit
will not restart operation until tube temperature is lower than the
protective temp. Value and the compressor is stopped for 3min. If the
protection occurs over 6 times, the unit cannot be recovered
automatically. Switch off the unit or re-energize the unit after cutting off
power to eliminate this protection.
22
CC
Long-distance
monitor or
centralized
controller has
set the
shielding
function
long-distance
monitor or
centralized
controller
When the unit is connected to long-distance monitor or centralized
controller, shielding function (including ON/OFF setting for shielding
function, temperature setting for shielding function, SE setting for
shielding function or all lock setting) can be set through long-distance
monitor or centralized controller. When all lock is set, “cc” code will be
always displayed on the indoor unit. When setting other shielding
function, “CC” code will be displayed for 1s after receiving the remote
control signal. This is the normal function for the unit. After cancel
shielding function through long-distance monitor or centralized
controller, this code will disappear automatically.
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U-Match Series Service Manual
2 FLOW CHART OF TROUBLESHOOTING
2.1 Troubleshooting Flow Chart of Main Control Malfunction
E1 High Pressure Protection
E2 Freeze Protection
Freeze protection is normal protection but not abnormal malfunction. If freeze protection occurs
frequently during operation, please check if the indoor filter is with filth blockage or if the indoor air outlet
is abnormal. The user is required to clean the filter, check the air outlet and air return pipe periodically to
ensure smooth air return and air outlet.
E3 stands for three statuses:
(1) Low pressure protection (48k/60k);
(2) Refrigerant lacking protection;
(3) Refrigerant recycling mode;
83
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① If enter refrigerant recycling mode through special operation, the displayed E3 is not an error
code. It will be eliminated when exiting refrigerant recycling mode.
② If you do not want to have refrigerant lacking protection, you can enter the debugging mode
through wired controller and then cancel the refrigerant lacking protection mode.
84
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U-Match Series Service Manual
E4 Discharge Protection
E6 Communication Malfunction
85
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E9 Full Water Protection
E9 protection
If the unit is
installed with
water pump
No
Yes
Replace the water pump
Short circuit the full water
protection interface on indoor
mainboard according to the circuit
diagram
Check if the
water pump
works normally
No
Replace the full water switch
or make sure the float of full
water switch works normally
Yes
Malfunction of
indoor ambient
temperature
sensor
Check if the
indoor ambient temperature
sensor on mainboard is inserted
on the needle
stand correctly
Disconnect
the temperature sensor and
measure if its resistance is
normal
Correctly insert the
temperature sensor
on the needle stand
Replace the
temperature sensor
Replace the indoor
mainboard
Yes
No
No
Yes
F0 Malfunction of Indoor Ambient Temperature Sensor
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U-Match Series Service Manual
F1 Malfunction of Evaporator Temperature Sensor
F2 Malfunction of Condenser Temperature Sensor
87
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F3 Malfunction of Outdoor Ambient Temperature Sensor
F4 Malfunction of Discharge Temperature Sensor
88
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U-Match Series Service Manual
F5 Malfunction of Wired Controller Temperature Sensor
2.2 Interface
GUHN18NK3HO/GUHN24NK3HO/GUHN30NK3HO
Main Control Board
89
Page 93
NO.
SILK-SCREEN
INTERFACE
INTERFACE INSTRUCTION
1
AC-N
Neutral wire input
Neutral wire input
2
HEAT
Compressor electrical heater
Compressor electric heating belt
3
4WAY
4-way valve
4-way valve
4
OFAN1
AC fan motor
AC fan motor
5
FA
Electronic expansion valve line
1 to 4-pin: Drive impulse output;5-pin:
+12V;
Interface of electronic expansion valve:
1 to 4-pin: Drive impulse output;
5-pin: +12V;
6
LPP
Low pressure switch for system protection
(obligate)
Interface of low pressure protection
7
HPP
High pressure switch for
systemprotection(obligate)
Interface of high pressure protection
8
CN1
1&2 pin: Tube sensor
3&4 pin: Ambient temperature
5&6 pin: Air discharge
1&2 pin: Case temperature sensor
3&4 pin: Ambient temperature sensor
5&6 pin: Discharge temperature sensor
9
SENSOR
High pressure switch for fan speed
adjustment
Pressure protection switch for fan speed adjustment
10
COM-INNER
Communication interface
Communication interface
11
AC-L
Live wire input
Live wire input
12
COMP
Compressor C
Compressor C
GUHN36NM3HO/GUHN42NM3HO/GUHN48NM3HO/GUHN60NM3HO
Main Control Board
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U-Match Series Service Manual
NO.
SILK-SCREEN
INTERFACE
INTERFACE INSTRUCTION
1
AC-N
Neutral wire input
Neutral wire input
2
HEAT
Compressor electrical heater
Compressor electric heating belt
3
4WAY
4-way valve
4-way valve
4
OFAN1
AC fan motor 1
AC fan motor 1
5
FA
Electronic expansion valve line
1 to 4-pin: Drive impulse output;5-pin:
+12V;
Interface of electronic expansion valve:
1 to 4-pin: Drive impulse output;
5-pin: +12V;
6
LPP
Low pressure switch for system
protection (obligate)
Interface of low pressure protection
7
HPP
High pressure switch for
systemprotection(obligate)
Interface of high pressure protection
8
CN1
1&2 pin: Tube sensor
3&4 pin: Ambient temperature
5&6 pin: Air discharge
1&2 pin: Case temperature sensor
3&4 pin: Ambient temperature sensor
5&6 pin: Discharge temperature sensor
9
SENSOR
High pressure switch for fan speed
adjustment
Pressure protection switch for fan speed
adjustment
10
COM-INNER
Communication interface
Communication interface
11
AC-L
Live wire input
Live wire input
12
COMP
Compressor AC Contactor
Compressor AC Contactor
13
OFAN2
AC fan motor 2
AC fan motor 2
NO.
SILK-SCREEN
INTERFACE
NO.
SILK-SCREEN
INTERFACE
1
AC-L
Power live wire
2
AC-N
Power neutral wire
3
CN61
Interface of fan motor 1
4
CN1
Interface of fan motor 2
5
PUMP
Water pump interface
6
WATER_DCDT
Full water detection
7
DOOR_C
Door control
8
TUBE
Evaporator temperature
sensor
GFH18K3HI/GFH18K3H1I/GFH24K3HI/GFH24K3H1I/GFH30K3HI/GFH30K3H1I/
GFH36K3HI/GFH36K3H1I/GFH42K3HI/GFH42K3H1I/GFH48K3HI/GFH48K3H1I/
GFH60K3HI/GFH60K3H1I
Main Control Board
91
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9
ROOM
Ambient temperature
sensor
10
COM_BMS2
Communication port of
centralized controller
11
COM_BMS1
MOUDBUS interface
12
DISP2
Interface of light board 2
13
DISP1
Interface of light board 1
14
COM_OUT
Interface of outdoor unit
15
COM_MANUAL
Interface of wired
controller
16
COM1
Interface of monitor
NO.
SILK-SCREEN
INTERFACE
NO.
SILK-SCREEN
INTERFACE
1
AC-L
Power live wire
2
AC-N
Power neutral wire
3
CN1
Interface of fan motor
4
PUMP
Water pump interface
5
WATER_DCDT
Full water detection
6
DOOR_C
Door control
7
TUBE
Evaporator temperature
sensor
8
ROOM
Ambient temperature
sensor
9
COM_BMS2
Communication port of
centralized controller
10
COM_BMS1
MOUDBUS interface
11
UD_SWING4
Swing motor 1
12
UD_SWING3
Swing motor 2
13
DISP2
Interface of light board 1
14
DISP3
Interface of light board 2
15
COM_OUT
Interface of outdoor unit
16
COM_MANUAL
Interface of wired
controller
17
COM1
Interface of monitor
GKH18K3HI/GKH24K3HI/GKH30K3HI/GKH36K3HI/GKH42K3HI/GKH48K3HI/GKH60K3HI
Main Control Board
92
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U-Match Series Service Manual
NO.
SILK-SCREEN
INTERFACE
NO.
SILK-SCREEN
INTERFACE
1
AC-L
Power live wire
2
AC-N
Power neutral wire
3
CN61
Interface of fan motor 1
4
CN1
Interface of fan motor 2
5
DOOR_C
Door control
6
TUBE
Evaporator temperature
sensor
7
ROOM
Ambient temperature
sensor
8
COM_BMS2
Communication port of
centralized controller 2
9
COM_BMS1
Communication port of
centralized controller 1
10
COM_BMS1
MOUDBUS interface
11
UN_SWING4
Swing motor 1
12
UN_SWING3
Swing motor 2
13
DISP2
Interface of light board 2
14
DISP1
Interface of light board 1
15
COM_OUT
Interface of outdoor unit
16
COM_MANUAL
Interface of wired
controller
17
COM1
Interface of monitor
GTH18K3HI/GTH24K3HI/GTH30K3HI/GTH36K3HI/GTH42K3HI/GTH48K3HI/GTH60K3HI
Main Control Board
93
Page 97
3 WIRING DIADRAM
3.1 Outdoor unit
The actual wiring should always refer to the wiring diagram of the unit.
Model: GUHN18NK3HO
94
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U-Match Series Service Manual
Model: GUHN24NK3HO, GUHN30NK3HO
Model: GUHN36NM3HO, GUHN42NM3HO, GUHN48NM3HO,GUHN60NM3HO
95
Page 99
3.2 Indoor unit
The actual wiring should always refer to the wiring diagram of the unit.
3.2.1 Duct Type
Model:GFH18K3HI,GFH24K3HI,GFH30K3HI,GFH36K3HI,GFH42K3HI,GFH48K3HI,GFH60K3HI
Model: GFH18K3H1I, GFH24K3H1I, GFH30K3H1I, GFH36K3H1I, GFH42K3H1I, GFH48K3H1I,
GFH60K3H1I
96
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U-Match Series Service Manual
3.2.2 Cassette Type
Model: GKH18K3HI
Model: GKH24K3HI, GKH30K3HI, GKH36K3HI, GKH42K3HI, GKH48K3HI
97
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