Cooper & Hunter CH-S18FTXG User manual

Service Manual
(Refrigerant R-410A)
MODELS: CH-S18FTXG, CH-S24FTXG
Cooper&Hunter International Corporation
GENERATION III

Table of Contents
CONTENTS
Summary and Features
1. Safety Precautions........................................................................................1
2. Specifications.....................................................................................................2
2.1 Unit Specifications ...........................................................................................................2
2.2 Operation Characteristic Curve .....................................................................................16
2.3 Capacity Variation Ratio According to Temperature ......................................................16
2.4 Operation Data ..............................................................................................................17
2.5 Noise Criteria Curve Tables for Both Models.................................................................18
3. Construction Views....................................................................................19
3.1 Indoor Unit .....................................................................................................................19
3.2 Outdoor Unit ..................................................................................................................19
4. Refrigerant System Diagram...........................................................20
4.1 18K ................................................................................................................................20
4.2 24K ................................................................................................................................21
5. Schematic Diagram....................................................................................22
5.1 Electrical Data ...............................................................................................................22
5.2 Electrical Wiring.............................................................................................................22
5.3 Printed Circuit Board .....................................................................................................25
6. Function and Control...............................................................................30
6.1 Remote Controller Description ......................................................................................30
6.2 Changing Batteries and Notices....................................................................................33
6.3 Unit Indication Section...................................................................................................33
6.4 Unit ON/OFF Button ......................................................................................................33
6.5 Description of Each Control Operation..........................................................................34

Table of Contents
7. Installation Manual......................................................................................39
7.1 Tools Required for Installation ......................................................................................39
7.2 Installation Position Selection........................................................................................39
7.3 Installation of Indoor Unit...............................................................................................40
7.4 Installation of Outdoor Unit ............................................................................................43
7.5 Power ............................................................................................................................45
7.6 Test Operation ...............................................................................................................45
8. Exploded Views and Parts List.....................................................46
8.1 Indoor Unit ....................................................................................................................46
8.2 Outdoor Unit .................................................................................................................60
9. Troubleshooting.............................................................................................68
9.1 Precautions before Performing Inspection or Repair.....................................................68
9.2 Confirmation ..................................................................................................................69
9.3 Flashing LED of Indoor/Outdoor Unit and Primary Judgement ....................................69
9.4 How to Check simply the main part ...............................................................................74
9.5 2-way, 3-way Valve Appearance....................................................................................92
10. Removal Procedure................................................................................99
10.1 Removal Procedure of Indoor Unit ..............................................................................99
10.2 Removal Procedure of Outdoor Unit ........................................................................105

Summary and features
Remote control window
YB1F2
Summary and features
CH-S18FTXG
Indoor/Outdoor Unit
CH-S24FTXG

1
Safety Precautions
1. Safety Precautions
Installing, starting up, and servicing air conditioner can be
hazardous due to system pressure, electrical components,
and equipment location, etc.
Only trained, qualified installers and service personnel are
allowed to install, start-up, and service this equipment.
Untrained personnel can perform basic maintenance fun-
ctions such as cleaning coils. All other operations should
be performed by trained service personnel.
When handling the equipment, observe precautions in the
manual and on tags, stickers, and labels attached to the
equipment. Follow all safety codes. Wear safety glasses
andwork gloves. Keep quenching cloth and fire extinguisher
nearby when brazing.
Read the instructions thoroughly and follow all warnings or
cautions in literature and attached to the unit. Consult local
building codes and current editions of national as well as
local electrical codes.
Recognize the following safety information:
Incorrect handling could result in
personal injury or death.
Incorrect handling may result in
minor injury,or damage to product
or property.
Warning
Caution
Caution
Warning
A
ll electric work must be performed by a licensed technician
according to local regulations and the instructions given in
this manual.
Before installing, modifying, or servicing system, main
electrical disconnect switch must be in the OFF position.
There may be more than 1 disconnect switch. Lock out
and tag switch with a suitable warning label.
Never supply power to the unit unless all wiring and tub-
ing are completed, reconnected and checked.
This system adopts highly dangerous electrical voltage.
Incorrect connection or inadequate grounding can cause
personal injury or death. Stick to the wiring diagram and
all the instructions when wiring.
Have the unit adequately grounded in accordance with
local electrical codes.
All installation or repair work shall be performed by your dea-
ler or a specialized subcontractor as there is the risk of fire,
electric shock, explosion or injury.
Have all wiring connected tightly. Loose connection may
lead to overheating and a possible fire hazard.
Make sure the outdoor unit is installed on a stable, level
surface with no accumulation of snow, leaves, or trash
beside.
Make sure the ceiling/wall is strong enough to bear the
weight of the unit.
Make sure the noise of the outdoor unit does not disturb
neighbors.
Follow all the installation instructions to minimize the risk
of damage from earthquakes, typhoons or strong winds.
Avoid contact between refrigerant and fire as it generates
poisonous gas.
Apply specified refrigerant only. Never have it mixed with
any other refrigerant. Never have air remain in the
refrigerant line as it may lead to rupture and other hazards.
Make sure no refrigerant gas is leaking out when install-
ation is completed.
Should there be refrigerant leakage, the density of refri-
gerant in the air shall in no way exceed its limited value,
or it may lead to explosion.
Keep your fingers and clothing away from any moving
parts.
Clear the site after installation. Make sure no foreign ob-
jects are left in the unit.
Always ensure effective grounding for the unit.
Never install the unit in a place where a combustible gas
might leak, or it may lead to fire or explosion.
Properly insulate any tubing running inside the room to
prevent the water from damaging the wall.
Make a proper provision against noise when the unit is
installed at a telecommunication center or hospital.
Provide an electric leak breaker when it is installed in a
watery place.
Never wash the unit with water.
Should any emergency occur, stop the unit and discon-
nect the power immediately.
Handle unit transportation with care. The unit should not
be carried by only one person if it is more than 20kg.
Never touch the heat exchanger fins with bare hands.
Never touch the compressor or refrigerant piping without
wearing glove.
Do not have the unit operate without air filter.
Important!
Please Read Before Starting

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16
Specifications
0 10203040506070 90 0110210010908070605040302010
80
11
10
9
8
7
6
5
4
3
2
1
0
Compressor speed (rps)
Current (A)
11
10
9
8
7
6
5
4
3
2
1
0
Compressor speed (rps)
Current (A)
• Conditions
Indoor : DB27˚C/WB19˚C
Outdoor : DB35˚C/WB24˚C
Indoor air flow : High
Pipe length : 5m
• Conditions
Indoor : DB20˚C/WB15˚C
Outdoor : DB7˚C/WB6˚C
Indoor air flow : High
Pipe length : 5m
220V
230V
240V
220V
230V
240V
<Cooling> <Heating>
<Cooling> <Heating>
010203040506070 90 0110210010908070605040302010
80
11
10
9
8
7
6
5
4
3
2
1
0
Compressor speed (rps)
Current (A)
11
10
9
8
7
6
5
4
3
2
1
0
Compressor speed (rps)
Current (A)
• Conditions
Indoor : DB27˚C/WB19˚C
Outdoor : DB35˚C/WB24˚C
Indoor air flow : High
Pipe length : 5m
• Conditions
Indoor : DB20˚C/WB15˚C
Outdoor : DB7˚C/WB6˚C
Indoor air flow : High
Pipe length : 5m
220V
230V
240V
220V
230V
240V
2.2 Operation Characteristic Curve
18K
24K
2.3 Capacity Variation Ratio According to Temperature
<Cooling> <Heating>
32 33 34 35 36 37 38 39 43 –15 –10 –5 0 5 7 10
40 41 42
100
105
95
90
85
80
75
70
65
60
55
50
Outdoor temp. (˚C)
Capacity ratio (%)
110
100
90
80
70
60
50
40
Outdoor temp. (˚C)
Capacity ratio (%)
• Conditions
Indoor : DB20˚C/WB15˚C
Indoor air flow : High
Pipe length : 5m
• Conditions
Indoor : DB27˚C/WB19˚C
Indoor air flow : High
Pipe length : 5m

17
Specifications
Cooling
Heating
NOTES :
(1) Measure surface temperature of heat exchanger pipe around center of heat exchanger path U
bent. (Thermistor thermometer)
(2) Connecting piping condition : 5 m
(3) P: pressure of air pipe connected to the indoor and outdoor units (gas valve side)
T1: Inlet and outlet temperature for evaporator
T2: Inlet and outlet temperature for condenser
2.4 Operation Data
Temperature condition
(°C) Model name
Standard
pressure
Heat exchanger pipe
temp. Indoor fan
mode
Outdoor fan
mode
Compressor
revolution (rps)
Indoor Outdoor P (MPa) T1 (°C) T2 (°C)
27/19 35/24 18K 0.9 to 1.1 12 to 14 70 to 40 Super High High 67
24K 0.8 to 1.0 10 to 12 72 to 40 Super High High 80
Temperature condition
(°C) Model name
Standard
pressure
Heat exchanger pipe
temp. Indoor fan
mode
Outdoor fan
mode
Compressor
revolution (rps)
Indoor Outdoor P (MPa) T1 (°C) T2 (°C)
20/- 7/6
18K 2.2 to 2.4 70 to 35 2 to 4 Super High High 60
24K 2.5 to 2.7 70 to 35 0 to 3 Super High High 78
(1) General energy efficiency unit
(2) High energy efficiency unit
Cooling
Heating
Temperature condition
(°C) Model name
Standard
pressure
Heat exchanger pipe
temp. Indoor fan
mode
Outdoor fan
mode
Compressor
revolution (rps)
Indoor Outdoor P (MPa) T1 (°C) T2 (°C)
27/19 35/- 18K 0.9 to 1.1 12 to 14 70 to 40 Super High High 72
24K 0.8 to 1.0 10 to 12 72 to 40 Super High High 83
Temperature condition
(°C) Model name
Standard
pressure
Heat exchanger pipe
temp. Indoor fan
mode
Outdoor fan
mode
Compressor
revolution (rps)
Indoor Outdoor P (MPa) T1 (°C) T2 (°C)
20/- 7/6
18K 2.2 to 2.4 70 to 35 2 to 4 Super High High 66
24K 2.5 to 2.7 70 to 35 0 to 3 Super High High 75

18
Specifications
2.5 Noise Criteria Curve Tables for Both Models
50
40
30
Indoor side noise when blowing
Indoor fan motor rotating speed
Low Middle High
Noise/dB(A)
40
42
44
46
48
50
52
54
56
20 4030 50 60 70 80 90
Noise dB(A)
Heating
Cooling
24K
24K((
High energy
efficiency unit
)
18K

19
Construction views
3. Construction Views
3.1 Indoor Unit
ON/OFF
Φ55Φ55
124
100
50 50
319
1008
865
540 150
40
Φ55 Φ55
298
40
175 193
685130
Wall Mounting Frame
Unit: mm
3.2 Outdoor Unit
890 340
700
396
955
364
560
W
H
D
Model W(mm)H(mm)D(mm)
18K 865 305 215/223(GWH18KG-K3DNB1B/I)
24K 1008 319 221

20
Refrigerant System Diagram
4. Refrigerant System Diagram
4.1 18K
INDOOR UNIT OUTDOOR UNIT
HEAT
EXCHANGE
(EVAPORATOR)
HEAT
EXCHANGE
(CONDENSER)
COMPRESSOR
GAS SIDE
3-WAY VALVE
LIQUID SIDE
2-WAY VALVE
COOLING
HEATING
Accumlator
Discharge
Suction
Muffler
4-Way valve
CapillaryStrainer Strainer
Refrigerant pipe diameter
Liquid : 1/4" (6 mm)
Gas : 1/2" (12 mm)
INDOOR UNIT OUTDOOR UNIT
HEAT
EXCHANGE
(EVAPORATOR)
HEAT
EXCHANGE
(CONDENSER)
COMPRESSOR
GAS SIDE
3-WAY VALVE
LIQUID SIDE
2-WAY VALVE
COOLING
Accumlator
Discharge
Suction
Muffler
Capillary Strainer
(1)Cooling Only Models
(2)Cooling & Heating Models

Refrigerant System Diagram
21
Refrigerant pipe diameter
Liquid : 1/4" (6 mm)
Gas : 1/2" (12 mm)
(1)Cooling Only Models
(2)Cooling & Heating Models
4.2 24K
INDOOR UNIT OUTDOOR UNIT
HEAT
EXCHANGE
(EVAPORATOR)
HEAT
EXCHANGE
(CONDENSER)
COMPRESSOR
GAS SIDE
3-WAY VALVE
LIQUID SIDE
2-WAY VALVE
COOLING
Accumlator
Discharge
Suction
Muffler
Strainer
Expansion valve
INDOOR UNIT OUTDOOR UNIT
HEAT
EXCHANGE
(EVAPORATOR)
HEAT
EXCHANGE
(CONDENSER)
COMPRESSOR
GAS SIDE
3-WAY VALVE
LIQUID SIDE
2-WAY VALVE
COOLING
HEATING
Accumlator
Discharge
Suction
Muffler
4-Way valve
Strainer Strainer
Expansion valve

22
Schematic Diagram
Symbol Parts name Symbol Color symbol Symbol Color symbol
C1 CBB61 BN BROWN WH WHITE
C2 CBB65 BU BLUE YE YELLOW
SAT OVERLOAD BK BLACK RD RED
COMP COMPRESSOR OG ORANGE YEGN YELLOW GREEN
PROTECTIVE EARTH WH WHITE
5. Schematic Diagram
5.1 Electrical Data
Meaning of marks
5.2 Electrical Wiring
Outdoor Unit
Indoor Unit
Indoor Unit
Symbol Color symbol Symbol Color symbol
BU BLUE BN BROWN
YE YELLOW GN GREEN
RD RED BK BLACK
YEGN YELLOW GREEN PROTECTIVE EARTH
These circuit diagrams are subject to change without notice, please refer to the one supplied with the unit.
OUTDOOR UNIT
MOTOR
FAN
PGF PG
0
MOTOR
RECEIVER AND
YEGN
BN
BU
L
N
SWING-UD
DISPLAY BOARD
DISP1
4YEGN
COM-OUT
N
0
AP1
TUBE
SWING
TEM. SENSOR
DISP2
JUMP YEGN
PE
PE
AP2
TUBE ROOM
TEM. SENSOR
CAP
EVAPORATOR
BU
BK
BN
EARTH-PLATE
L
L
RT1
RT2
M1
BLOCK
TERMINAL
1BU
N(1)
2
XT
3
3BN
2BK
ROOM
M2
L-OUT
AC-L
NO COM

23
Schematic Diagram
RT2 RT1
EARTH-PLATE
BN
BK
BU
EVAPORATOR
CAP
TEM. SENSOR
ROOM
TUBE
AP2
PE
PE
YEGN
JUMP
DISP2
TEM. SENSOR
SWING
TUBE
AP1
0
N
COM-OUT
4YEGN
DISP1
DISPLAY BOARD
SWING-UD
N
L
BU
BN
YEGN
RECEIVER AND
MOTOR
0
PG
PGF
FAN
MOTOR
OUTDOOR UNIT
HEALTH-L HEALTH-N
RD BU
L
L
M2
ROOM
2BK
3BN
3
XT
2
N(1)
1BU
TERMINAL
BLOCK
M1
IONIZER
AC-L L-OUT
NO COM
Outdoor Unit
TEM.SENSOR
EXHAUST
TEM.SENSOR
OUTROOM
TEM.SENSOR
OUTTUBE
L
INDC1
WH OG
INDC2
COMP-W
COMP-V
COMP-U
COMPRESSOR
EKV
FAN MOTOR
YE
TERMINAL BLOCK
BN
RD
C1
X1
C2
PFCC1
YE
PFCC2
PE
BU
BN
BK
FA
COMP
YEGN
YEGN
SAT
4WH
5WH
OVC-COMP
OFAN
PE
3RD2BU
1YE
RT3
RT2
RT1
COM-INNER(1)
PE
PE
E
C(T,U)
RD
YE BU
N(1)
2
3
XT
AP1
BK
BN
PE
BU
YEGN
N
AC-L
6YEGN
T-SENSOR
S(W,X)
R(M,V)
0
0
0
WH BK
WARNING
Please don't touch any terminal when the
AP1 is higher than 30V to prevent the risk
of electrical shock!
voltage of terminal P(DC+) and N(DC-) at
INDOOR UNIT
～
M

24
Schematic Diagram
WARNING
Please don't touch any terminal when the
AP1 is higher than 30V to prevent the risk
of electrical shock!
voltage of terminal P(DC+) and N(DC-) at
4YV
TEM.SENSOR
EXHAUST
TEM.SENSOR
OUTROOM
TEM.SENSOR
OUTTUBE
L
INDC1
WH OG
INDC2
COMP-W
COMP-V
COMP-U
COMPRESSOR
EKV
4-WAY
FAN MOTOR
YE
TERMINAL BLOCK
BN
RD
C1
X1
C2
PFCC1
YE
PFCC2
PE
BU
BN
BK
FA
COMP
YEGN
YEGN
SAT
4WH
5WH
OVC-COMP
OFAN
PE
3RD2BU
1YE
4V
RT3
RT2
RT1
COM-INNER(1)
PE
PE
E
C(T,U)
RD
YE BU
N(1)
2
3
XT
AP1
BK
BN
PE
BU
YEGN
N
AC-L
6YEGN
T-SENSOR
VALVE
S(W,X)
R(M,V)
0
0
0
WH BK
INDOOR UNIT
～
M

25
Schematic Diagram
5.3 Printed Circuit Board
Indoor Unit
(1)Control PCB
TOP VIEW
Up&down swing
terminal
PG feedback
terminal
Jumper cap
PG motor terminal
Piezoresistor
Fan capacitor
Protective
tube
Neutral line
connects the
terminal of
copper pin
Auxiliary relay K1, K2
Supply power for
outdoor unit's
control relay K4
Connect to the
copper pin of
communication
line of outdoor
unit
Filter SF2022A-05220
Rectifier DB1 High-frequency
transformer T1
Connect the terminal of diaplay
board DISP1, DISP2
Ambient
temperature
sensor terminal
Tube temperature
sensor terminal
Health relay K3

26
Schematic Diagram
BOTTOM VIEW

27
Schematic Diagram
13
14
12
1
23 45
11
67
10
9
8
R6 7
(OG)
C301
C103
C3
R2
L2
C2
C304
++
D44
(YE)
PFCC2
BD1
(YE)
PFCC1
D20
(YE)
COMP-U
(BU)
(RD)
COMP-V COMP-W
RV4
C74
U23
Q16
BD2
U20
U22
INDC2
C120
++
C302
PZ1
D12
IPM1
U7
C69
C70
CN101
D11
C71
D13
D18
C66
CN6
BD3
++
C305
D41
++
R100
C217
R128
R127
D19
++
D101
C303
U13
D42
C218
C164
C227
PTC1
C4
K1
K2
CT1
FU1
C54
T1
CN5 D21
CN9
C222
D25
D24
L4
C219
<WH>
INDC1
D23
C221
U19 R69
U12
D3
C25
Q3
U15
K4
CN102
2
J1
1
C65 C64
C216
C63
U6
C13
C118
R131
U14
U21
U2
C224 C223
D27
D26
C225
1413
Y1
C62
C72
OVC-COMP
GRJW823-A V1.3
2010.01.06
SOLD
C7 3
HPP T-SENSOR FA HAL L
U5
SMT AI HI
0
C60
12 3 4 5 6 78 9
L1
C5
(BU)
N
(YEGN)
PE
(BN)
TVS1
AC_L
C6
RV2
C1
RV1
RV3
72 : T30AH 250V
50/18K/24K T25AH 250V
R70
(BK)
COM-INNER
HEAT
RC2
ZD1
C24
FU2
ZD2
R184
R15
T3.15AL 250V
R185
R14
ZD4
ZD3
D1
RC1
R68
K6
K3
D2
K5
OFAN 4V
J102 J103
Outdoor Unit (1)Control PCB
TOP VIEW

28
Schematic Diagram
4
23
10
9
65
1
7
8
R96R94
R188
R189
YE
(BU)
(RD)
COMP-W
R13 5 C14 2
COMP-U
COMP-V
R43R44
U11
C106
R80 C105
R193
C10
R8
R198
R151
R152
C220
C32
R10
RS8
R199
Q11
R205
R7
R26
R142
R165
R181
R5
R161
R9
R138
C79
C80
Q17
R192
D28
R150
R31
C67
D10
R162
R153
R207
R206
C12
R126
Q18
Q23
R183
R182
R197
DC+
R249
R12C138
R22C14
C163
C126
R13 7 C14 0
R15 7
C13 9
R18 7 C13 7
R99
C14 3
R234
R237
R240
R243
R24 6
D47
R233
R236
R239
R242
R245
R248
R232
R241
R235
R238
R244
R247
C134
C162
RS1
R103
C132
R45
R42
R102
C131
R41
R40
R38
R60
C7
R201
R202
R164
R200
C115
C130
R87
C91
C88
R85
R83
C92
C89
C93
C90
C85
C87
D46
R86R84 R82
R113
R170
C94
C95
C86
C102
D45
C100
C96
C101
C145
C38
R88
C57
R174
R154
R158
R155
C82
R139
C121
R130
C146
C147
R34
R98
C68
R13 6
C14 1
D39
R24
C135
R54
R27
R156
D40
C34
R140
D22R75
R78
U8
R116
R3
C9
C8
R4 R76
C36
C29
C30
D14
R79
R73 Q1
D4 C23
Q9
R123
R125
R71
R114
D17
C42
C37
C370
D290
D31
R11
Q5
Q6
C39
C35
R74
R72
C40
D32
U9
R36
R129
R21
R121
POWER
C21
D8
C51
C52
D7
C49
C50
R81
R66
R65
R173
R64
R91R6
C47
C48
C41
U10
D29
C44
R143
R141
R175
R62
R144
R171
C81
C22
C43
C110
C59
C1 3 6
C11
R117
D15
R25
U24
D43
R23
R163
R13
R16
C26
R1
C56
C58
C55
R124
R50
C31D9
U3
R159
R35
R132
R19
C97
R12 2
R51
C18
C98
C75
C117
1
R133
C109 C122
C33
C108
C111
C77
C124
U4
R134
R29
C83
C28
R20
R89
R172
R90
C53
C19
C45
C78
C84
R63C46
R77
D5
12
D6
3
D16
4
D30
R55
R56
R61 R57
R58
R37
C15
R106
R105
R49
C116
C76
U1
R28
R101
C27
C125
C114
C113
R30
C123
R179
C119
C144
C17
C16
R176
C112
R177
R1 8 6
R53
R52
R107
D33
R111
C107
D35
R109
D34
R180
R59
C20
R115
R33
R32
R17
R196
R169
SGND
R145
R146R17 8
R149
R160
R168
R147
R148
R166
+5V
HW
R167
HU
HV
C159
R18
C99
C12 7C128
R118
R119
W
R120
RS4
D37
RS2
RS6
RS3
RS5
D38
D36
R46
R47
R104
C133
C104
R48
R112
R39
R108
R110
)N()N(
(E)
(AC-L)
R95
R97
R93
R92
V
U
BOTTOM VIEW