Service manual
Room Air Conditioner
Split Wall-Mounted Type
GC/CU-S24HR
GC/CU-S30HR
GC/CU-S36HR
www.generalclimate.com Wall-Mounted Split Type
Content
1. Precaution 1
1.1 Safety Precaution 1
1.2 Warning 1
2. Function 3
3. Dimension 5
3.1 Indoor unit 5
3.2 Outdoor unit 6
4. Specification 7
5. Refrigerant cycle diagram 8
6. Operation limits 9
6.1 Cooling operation 9
6.2 Heating operation 9
7. Schematic diagram and Wiring diagram 9
7.1 Schematic diagram 10
7.2 Wiring diagram 11
8. Installation details 13
8.1 Wrench torque sheet for installation 13
8.2 Connecting the cables 13
8.3 Pipe length and the elevation 13
8.4 Air purging of the piping and indoor unit 14
8.5 Pumping down (Re-installation) 15
8.6 Re-air purging (Re-installation) 16
8.7 Balance refrigerant of the 2-way, 3-way valves 17
8.8 Evacuation 18
8.9 Gas charging 19
9. Capacity table 20
9.1 GC/GU-S24HR 20
9.2 GC/GU-S30HR 21
9.3 GC/GU-S36HR 22
10. Electronic function 23
10.1 Electronic control working environment 23
10.2 Proper symbols and their meaning 23
10.3 Function 24
10.4 Protection 24
10.5 Fan only mode 24
10.6 Cooling mode 24
10.7 Dehumidifying mode 25
10.8 Heating mode 25
10.9 Defrosting mode(available for heating mode) 27
10.10 Auto mode 28
10.11 Force cooling function 28
10.12 Sleep mode 28
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10.13 Auto restart function 29
11. Model and Parameters 30
12. Troubleshooting 31
12.1 Display board 31
12.2 Troubleshooting 32
12.3 Diagnostic chart 33
12.4 Resetting phenomenon often occurs during operation. 34
12.5 Operation lamp flashes and Timer lamp off. 34
12.6 Operation lamp flashes and Timer lamp on. 34
12.7 Operation lamp off and Timer lamp flashes 35
12.8 Operation lamp on and Timer lamp flashes 35
12.9 Operation lamp flashes, Timer lamp flashes . 35
13. Characteristic of temperature sensor 36
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1. Precaution
1.1 Safety Precaution
n To prevent injury to the user or other people and property damage, the following instructions must be followed.
n Incorrect operation due to ignoring instruction will cause harm or damage.
n Before service unit, be sure to read this service manual at first.
1.2 Warning
Ø Installation
n Do not use a defective or underrated circuit breaker.
Use this appliance on a dedicated circuit.
There is risk of fire or electric shock.
n For electrical work, contact the dealer, seller, a
qualified electrician, or an Authorized service center.
Do not disassemble or repair the product, there is risk of
fire or electric shock.
n Always ground the product.
There is risk of fire or electric shock.
n Install the panel and the cover of control box
securely.
There is risk of fire of electric shock.
n Always install a dedicated circuit and breaker.
Improper wiring or installation may cause fore or electric
shock.
n Use the correctly rated breaker of fuse.
There is risk of fire or electric shock.
n Do not modify or extend the power cable.
There is risk of fire or electric shock.
n Do not install, remove, or reinstall the unit by
yourself (customer).
There is risk of fire, electric shock, explosion, or injury.
n Be caution when unpacking and installing the
product.
Sharp edges could cause injury, be especially careful of
the case edges and the fins on the condenser and
evaporator.
n For installation, always contact the dealer or an
Authorized service center.
There is risk of fire, electric shock, explosion, or injury.
n Do not install the product on a defective installation
stand.
It may cause injury, accident, or damage to the product.
n Be sure the installation area does not deteriorate
with age.
If the base collapses, the air conditioner could fall with it,
causing property damage, product failure, and personal
injury.
n Do not let the air conditioner run for a long time
when the humidity is very high and a door or
windows is left open.
Moisture may condense and wet or damage furniture.
n Take care to ensure that power cable could not be
pulled out or damaged during operation.
There is risk of fire or electric shock.
n Do not place anything on the power cable.
There is risk of fire or electric shock.
n Do not plug or unplug the power supply plug during
operation.
There is risk of fire or electric shock.
n Do not touch (operation) the product with wet hands.
There is risk of fire or electric shock.
n Do not place a heater or other appliance near the
power cable.
There is risk of fire and electric shock.
n Do not allow water to run into electric parts.
It may cause fire, failure of the product, or electric shock.
n Do not store or use flammable gas or combustible
near the product.
There is risk of fire or failure of product.
n Do not use the product in a tightly closed space for a
long time.
Oxygen deficiency could occur.
n When flammable gas leaks, turn off the gas and
open a window for ventilation before turn the
product on.
Do not use the telephone or turn switches on or off.
There is risk of explosion or fire.
n If strange sounds, or small or smoke comes from
product. Turn the breaker off or disconnect the
power supply cable.
There is risk of electric shock or fire.
n Stop operation and close the window in storm or
hurricane. If possible, remove the product from the
window before the hurricane arrives.
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There is risk of property damage, failure of product, or
electric shock.
n Do not open the inlet grill of the product during
operation. (Do not touch the electrostatic filter, if the
unit is so equipped.)
There is risk of physical injury, electric shock, or product
failure.
n When the product is soaked (flooded or submerged),
contact an Authorized service center.
There is risk of fire or electric shock.
n Be caution that water could not enter the product.
There is risk of fire, electric shock, or product damage.
n Ventilate the product from time to time when
operating it together with a stove, etc.
There is risk of fire or electric shock.
n Turn the main power off when cleaning or
maintaining the product.
There is risk of electric shock.
n When the product is not be used for a long time,
disconnect the power supply plug or turn off the
breaker.
There is risk of product damage or failure, or unintended
operation.
n Take care to ensure that nobody could step on or fall
onto the outdoor unit.
This could result in personal injury and product damage.
Ø CAUTION
n Always check for gas (refrigerant) leakage after
installation or repair of product.
Low refrigerant levels may cause failure of product.
n Install the drain hose to ensure that water is drained
away properly.
A bad connection may cause water leakage.
n Keep level even when installing the product.
To avoid vibration of water leakage.
n Do not install the product where the noise or hot air
from the outdoor unit could damage the
neighborhoods.
It may cause a problem for your neighbors.
n Use two or more people to lift and transport the
product.
Avoid personal injury.
n Do not install the product where it will be exposed to
sea wind (salt spray) directly.
It may cause corrosion on the product. Corrosion,
particularly on the condenser and evaporator fins, could
cause product malfunction or inefficient operation.
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Ø Operational
n Do not expose the skin directly to cool air for long
periods of time. (Do not sit in the draft).
This could harm to your health.
n Do not use the product for special purposes, such
as preserving foods, works of art, etc. It is a
consumer air conditioner, not a precision refrigerant
system.
There is risk of damage or loss of property.
n Do not block the inlet or outlet of air flow.
It may cause product failure.
n Use a soft cloth to clean. Do not use harsh
detergents, solvents, etc.
There is risk of fire, electric shock, or damage to the
plastic parts of the product.
n Do not touch the metal parts of the product when
removing the air filter. They are very sharp.
There is risk of personal injury.
n Do not step on pr put anything on the product.
(outdoor units)
There is risk of personal injury and failure of product.
n Always insert the filter securely. Clean the filter
every two weeks or more often if necessary.
A dirty filter reduces the efficiency of the air conditioner
and could cause product malfunction or damage.
n Do not insert hands or other object through air inlet
or outlet while the product is operated.
There are sharp and moving parts that could cause
personal injury.
n Do not drink the water drained from the product.
It is not sanitary could cause serious health issues.
n Use a firm stool or ladder when cleaning or
maintaining the product.
Be careful and avoid personal injury.
n Replace the all batteries in the remote control with
new ones of the same type. Do not mix old and mew
batteries or different types of batteries.
There is risk of fire or explosion.
n Do not recharge or disassemble the batteries. Do not
dispose of batteries in a fire.
They may burn of explode.
n If the liquid from the batteries gets onto your skin or
clothes, wash it well with clean water. Do not use the
remote of the batteries have leaked.
The chemical in batteries could cause burns or other
health hazards.
2. Function
T
he function will be
Room temp
erature sensor.
Maintain the room temperature in accordance with the setting temperature.
Indoor fan is delayed for 5 sec at the starting.
Restarting is for approx.
3
minutes..
High
, med, low, breeze.
Light up in the LED (LCD) for each operation mode.
The unit will decide the louver direction according to operation mode.
The fan is turn to low speed
(cooling/heating).
The function is usually used in rainy days in
The louver can be
set at the desired position or swing up and
The unit can be change by the room temperature.
P
revent the cold wind at
Indoor unit
Operation ON/OFF by remote controller
Sensing by room temperature
Pipe temperature sensor.
Room temperature control
Starting temperature control
Time Delay Safety control
Indoor fan speed control
Operation indication Lamps (LED)
Two-direction air vane
Sleep mode auto control
The unit will be turn off after seven hours.
Independent dehumidification
springtime or damp areas.
Self-diag. function
operate in any operation
Air flow Direction control
down automatically
Anti-cold function
the beginning of unit start.
Temp. Compensation
Defrost mode
Auto-restart function
Flexible wiring connection
Easy clean panel
Auto mode
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T
he unit can operate in cooling mode at low
ambient
temperature conditions.
The unit has
3 mins delay between
continuously
ON/OFF
operations
.
Outdoor unit
B
ird tail propeller fan makes the outdoor unit run more quietly.
T
he hydrophilic fin can improve the heating efficiency at operation mode.
I
t is only operated in t
he heating operation mode except defrosting
operation
.
Made from electrolytic zinc steel shee
t and anti
-
rust coated components.
I
t protects the valves and prevents water from dripping.
Power relay control
Low ambient kit
Low noise air flow system
Hydrophilic aluminum fin
4 way valve control
Discharge pipe temperature protect
Anti-rust cabinet
Valve protection cover
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3. Dimension
3.1 Indoor unit
Dimension
Mode
24K1080330222
30K1080330222
36K1250325230
WHL
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560
360
735
560
360
735
560
360
735
3.2 Outdoor unit
Dimension
Mode
WHDL1L2L3
24K845695335
30K845695335
36K895860302
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μ
m3/h
≤
≤
Ф
Ф
Φ
m
4. Specification
Model
Power supply
Capacity Btu/h
Cooling
Input W
Rated current A
EER Btu/w.h
Capacity Btu/h
Heating
Input W
Rated current A
COP W/W
Max. current
Starting current
Model
Type
Brand
Capacity Btu/h
Compressor
Input W
Rated current(RLA) A
Locked rotor Amp(LRA) A
Thermal protector
Capacitor uF
Refrigerant oil ml
Model
Indoor
fan motor
Brand
Input W
Capacitor uF
Speed(hi/mi/lo) r/min
Indoor air flow (Hi/Mi/Lo)
Indoor noise level (Hi/Mi/Lo)
Model
Outdoor
fan motor
Brand
Input W
Capacitor uF
Speed r/min
Outdoor air flow
Outdoor noise level
Refrigerant type R410A
Design pressure
Refrigerant
piping
Liquid side/ Gas side mm
Max. refrigerant pipe length m
Max. difference in level m
Operation temp
Ambient temp
Application area
Ph-V-Hz
A
A
m3/h
dB(A)
dB(A)
g
MPa
℃
℃
2
GC/GU-S24HRGC/GU-S30HRGC/GU-S36HR
1, 220-240V~,50Hz1, 220-240V~,50Hz
2400028000
27503200
12,515
8.7, 2.68,8
2700030000
27503100
12,514,5
2,99,79,3
162032
5076150
QP407PT24CZR34KH-PFJ-522
RotaryScroll
LGCopeland
2340028800
23172520
10,112,1
5476
InternalInternal15HM1637
4550
65012421240
YDK36-4GYDK36-4GYDK50-4E
WellingWellingWelling
65/63/6068/65/62
2μF/450V3
1050/950/8501150/1050/9501260/1150/990
1050/950/8501150/1050/9501350/1200/1050
43/40/3747/44/41
YDK53-6KYDK53-6KYDK100-6
WellingWellingWelling
130140169
3,53,55
800800900
250025003000
56
R22/1900R22/24502450
2,62,62,6
9.53/Ф16.0
202025
101010
17-3017-3017-30
-7 - 45-7 - 45-7 - 45
40~5650~6860~78
F/450V3
58
9.53/Ф16.0
1, 220-240V~, 50Hz
35000
4120
18,6
8,5
38000
4100
18,5
ZR47K3-PFJ-522
SCROLL
COPELAND
39000
3510
19,3
114
60uF/≥400VAC
85/80/77
49/46/42
59
9.52/Φ16
Note:
The noise date is base on hemi-anechoic chamber, during actual operation; these values are normally somewhat
different as a result of ambient condition.
The above design and specifications are subject to change without prior notice for product improvement.
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5. Refrigerant cycle diagram
Ø Cooling only
Ø Heat pump mode
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6. Operation limits
6.1 Cooling operation
Outdoor unit air temp.℃ DB
Indoor air temp. ℃ DB
Note: The chart is the result from the continuous operation under constant air temperature conditions. However, excludes the initial
pull-down stage.
6.2 Heating operation
Indoor air temp. ℃ DB
Outdoor unit air temp.℃ DB
Note: The chart is the result from the continuous operation under constant air temperature conditions. However, excludes the initial
pull-down stage.
7. Schematic diagram and Wiring diagram
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7.1 Schematic diagram
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7.2 Wiring diagram
7.2.1 Heating mode
GC/GU-S24HR, GC/GU-S30HR
A2
A1
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GC/GU-S36HR
A1A2
www.generalclimate.com 12 Wall-Mounted Split Type
length
Btu/h
GAS
LIQUID
B (m)A
(m)
(g/m)
24K
5/8’’ (φ15.88)
3/8’’ (φ9.52)
51020655/8’’ (φ15.88)
3/8’’ (φ9.52)
51530653/4’’ (φ19.05)
3/8’’ (φ9.52)
51530
65
8. Installation details
8.1 Wrench torque sheet for installation
Outside diameter
Torque
mminchKg.m
φ6.351/41.8
φ9.523/84.2
φ12.71/25.5
φ15.885/86.6
φ19.053/46.6
8.2 Connecting the cables
The power cord of connect should be selected according to the following specifications sheet.
Grade
Unit24K30K36K
mm22,52,52,5
8.3 Pipe length and the elevation
Capacity
Standard
Pipe size
(m)ElevationElevationrefrigerant
Max.Max.Additional
30K~36K
In case that more
than 5m.
Caution:
Capacity is base on standard length and maximum allowance length is base of reliability.
Oil trap should be install per 5-7 meters.
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