LG Electronics Air Conditioner A3UC363FA0LMU360CE User Manual
website http://www.lgservice.com  
LG  
LG  
Multi Type Air Conditioner  
SERVICE MANUAL  
MODEL  
• Indoor Unit:  
Room Type  
Art Cool Type  
AMNH093D4A0(LMN090HE)  
AMNC093D4A0(LMN090CE)  
AMNH123DEA0(LMN120HE)  
AMNC123DEA0(LMN120CE)  
AMNH093APM0(LMAN090HNS)  
AMNC093APM0(LMAN090CNS)  
AMNH123APM0(LMAN120HNS)  
AMNC123APM0(LMAN120CNS)  
• Outdoor Unit: A3UH363FA0(LMU360HE)  
A3UC363FA0(LMU360CE)  
CAUTION  
• BEFORE SERVICING THE UNIT, READ THE SAFETY  
PRECAUTIONS IN THIS MANUAL.  
• ONLY FOR AUTHORIZED SERVICE PERSONNEL.  
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Model Number Nomenclature  
Model Number Nomenclature  
Indoor Unit  
09  
AMN  
H
3
D
4
A
0
Serial Number  
Function  
A : Basic, L : Nano Plasma + Auto Clean(Wall Mounted)  
C: Plasma(Ceiling Cassette), G: Low Static Motor  
ART COOL(DELUXE) Type Front Panel Color  
B : Blue, D : Wood, M : Metal, R : Mirror, W : White  
Chassis Name  
Indoor Unit Type  
Wall mounted split  
D : D- look type  
M : M- look type  
Artcool type  
L : L- look type G : G- look type  
N : N- look type  
A : standard/wide type D : Deluxe type  
B : Ceiling Concealed Duct  
V : Ceiling & Floor(Convertible)  
Electrical Rating  
3: 1Ø, 208~230V, 60Hz  
Nominal Cooling Capacity in Btu/h  
Ex) 9,000 Btu/h '09', 12,000 Btu/h '12'  
Model Type  
H: Heat Pump C: Cooling Only  
MPS Variable Multi System Indoor Unit  
Outdoor Unit  
A3U  
H
36  
3
F
A
0
Serial Number  
Function  
A : Basic  
Multi Type  
F : Free Joint Multi Type  
Electrical Ratings  
3: 1Ø, 208~230V, 60Hz  
Nominal Cooling Capacity in Btu/h  
Ex) 24,000 Btu/h '24', 36,000 Btu/h '36'  
Model Type  
H: Heat Pump C: Cooling Only  
R-410A MPS Variable Multi System Outdoor Unit  
And No. of Connectable Indoor Units  
Ex) A3U : Connectable max. 2 Indoor Units  
Service Manual 3  
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Model Number Nomenclature  
Combination table  
Cooling  
Heating  
Combination(k Btu)  
Operation  
Capacity (Btu/h)  
Total Unit-A Unit-B Unit-C Total  
9000  
12 12000  
Capacity (Btu/h)  
Unit-A Unit-B Unit-C Total  
COP  
Input Current EER  
(W) (A) (Btu/h.w)  
Input Current  
(W)  
(A)  
A
9
B
C
(Btu/h.w) (w/w)  
9
9000 1320  
12000 1320  
18000 2180  
21000 2200  
24000 2200  
5.9  
5.9  
9.8  
9.9  
9.9  
6.8  
9.1  
8.3  
9.5  
10.9  
7.4  
8.2  
9.0  
9.8  
9000  
9000  
12000  
18000  
21000  
24000  
1550  
1410  
2160  
2160  
2160  
7.0  
5.8  
8.5  
1.7  
2.5  
2.4  
2.8  
3.3  
1 UNIT  
2 UNIT  
12  
9
12000  
6.3  
9.8  
9.8  
9.8  
9
18  
21  
9000  
9000  
9000 9000  
9000 12000  
12000 12000  
8.3  
9
12  
12  
9
9000 12000  
9.7  
12  
9
24 12000 12000  
11.1  
9
27  
30  
33  
9000  
9000  
9000 9000 27000 3650 16.5  
9000 12000 30000 3650 16.5  
9000 9000  
9000  
27000  
3300  
3340  
3340  
3340  
14.9  
15.0  
15.0  
15.0  
8.2  
9.0  
2.4  
2.6  
2.9  
3.2  
9
9
12  
12  
12  
9000 9000 12000 30000  
9000 12000 12000 33000  
12000 12000 12000 36000  
3 UNIT  
9
12  
12  
9000 12000 12000 33000 3650 16.5  
9.9  
12  
36 12000 12000 12000 36000 3680 16.6  
10.8  
Notes :  
1.Cooling Capacity is based on : indoor temp. 26.7°C(80.1°F)DB, 19.4°C(66.9°F)WB; outdoor temp. 35°C(95°F)DB, 23.9°C(75°F)WB  
2.Heating Capacity is based on : indoor temp. 21.1°C(70°F)DB, 15.6°C(60.1°F)WB; outdoor temp. 8.3°C(46.9°F)DB, 6.1°C(43°F)WB  
3.The total ability of connected a indoor unit is up to 24k Btu/h  
Symbols Used in this Manual  
This symbol alerts you to the risk of electric shock.  
This symbol alerts you to hazards that could cause harm to the  
air conditioner.  
NOTICE  
This symbol indicates special notes.  
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Safety Precautions  
Safety Precautions  
To prevent injury to the user or other people and property damage, the following instructions must  
be followed.  
■ Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is  
classified by the following indications.  
This symbol indicates the possibility of death or serious injury.  
WARNING  
CAUTION This symbol indicates the possibility of injury or damage to properties only.  
■ Meanings of symbols used in this manual are as shown below.  
Be sure not to do.  
Be sure to follow the instruction.  
WARNING  
■ Installation  
Do not use a defective or under-  
rated circuit breaker. Use this  
appliance on a dedicated circuit.  
For electrical work, contact the  
dealer, seller, a qualified electrician,  
or an Authorized Service Center  
Always ground the product.  
.
• There is risk of fire or electric  
shock.  
• Do not disassemble or repair the  
product. There is risk of fire or  
electric shock.  
• There is risk of fire or electric  
shock.  
Install the panel and the cover  
of control box securely.  
Always install a dedicated cir-  
cuit and breaker.  
Use the correctly rated break-  
er or fuse.  
• There is risk of fire or electric  
shock.  
• Improper wiring or installation may • There is risk of fire or electric  
cause fire or electric shock shock.  
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Safety Precautions  
Do not modify or extend the  
power cable.  
Do not install, remove, or re-  
install the unit by yourself  
(customer).  
Be cautious when unpacking  
and installing the product.  
• There is risk of fire or electric  
• There is risk of fire, electric shock, • Sharp edges could cause injury.  
shock.  
explosion, or injury.  
Be especially careful of the case  
edges and the fins on the con-  
denser and evaporator.  
For installation, always con-  
tact the dealer or an  
Do not install the product on a Be sure the installation area  
defective installation stand.  
does not deteriorate with age.  
Authorized Service Center.  
• There is risk of fire, electric shock, • It may cause injury, accident, or  
• If the base collapses, the air condi-  
tioner could fall with it, causing  
property damage, product failure,  
and personal injury.  
explosion, or injury.  
damage to the product.  
Do not let the air conditioner  
run for a long time when the  
humidity is very high and a  
door or a window is left open.  
Take care to ensure that  
power cable could not be  
pulled out or damaged during  
operation.  
Do not place anything on the  
power cable.  
• Moisture may condense and wet or • There is risk of fire or electric  
• There is risk of fire or electric  
damage furniture.  
shock.  
shock.  
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Safety Precautions  
Do not plug or unplug the  
power supply plug during  
operation.  
Do not touch(operate) the  
product with wet hands.  
Do not place a heater or other  
appliances near the power  
cable.  
• There is risk of fire or electric  
• There is risk of fire or electrical  
• There is risk of fire and electric  
shock.  
shock.  
shock.  
Do not allow water to run into  
electric parts.  
Do not store or use flammable Do not use the product in a  
gas or combustibles near the  
product.  
tightly closed space for a long  
time.  
• It may cause There is risk of fire,  
failure of the product, or electric  
shock.  
• There is risk of fire or failure of  
product.  
• Oxygen deficiency could occur.  
Gasolin  
When flammable gas leaks,  
turn off the gas and open a  
window for ventilation before  
turn the product on.  
If strange sounds, or small or  
smoke comes from product.  
Turn the breaker off or discon- If possible, remove the prod-  
Stop operation and close the  
window in storm or hurricane.  
nect the power supply cable.  
uct from the window before  
the hurricane arrives.  
• Do not use the telephone or turn  
switches on or off. There is risk of  
explosion or fire  
• There is risk of electric shock or  
fire.  
• There is risk of property damage,  
failure of product, or electric shock.  
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Safety Precautions  
Do not open the inlet grill of the product  
during operation. (Do not touch the elec-  
trostatic filter, if the unit is so equipped.)  
When the product is soaked  
(flooded or submerged), contact not enter the product.  
an Authorized Service Center.  
Be cautious that water could  
• There is risk of physical injury,  
• There is risk of fire or electric  
• There is risk of fire, electric shock,  
electric shock, or product failure.  
shock.  
or product damage.  
Ventilate the product from time to time when  
operating it together with a stove, etc.  
Turn the main power off when cleaning or  
maintaining the product.  
• There is risk of fire or electric shock.  
• There is risk of electric shock.  
When the product is not be used for a long time, dis-  
connect the power supply plug or turn off the breaker.  
Take care to ensure that nobody could step on  
or fall onto the outdoor unit.  
• There is risk of product damage or failure, or unintend- • This could result in personal injury and product dam-  
ed operation.  
age.  
CAUTION  
■ Installation  
Always check for gas (refrigerant) leak-  
age after installation or repair of product.  
Install the drain hose to ensure that  
water is drained away properly.  
Keep level even when  
installing the product.  
• Low refrigerant levels may cause  
failure of product.  
• A bad connection may cause water • To avoid vibration or water leak-  
leakage. age.  
90°  
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Safety Precautions  
Do not install the product  
where the noise or hot air  
from the outdoor unit could  
damage the neighborhoods.  
Use two or more people to lift  
and transport the product.  
Do not install the product  
where it will be exposed to  
sea wind (salt spray) directly.  
• It may cause a problem for your  
neighbors.  
• Avoid personal injury.  
• It may cause corrosion on the  
product. Corrosion, particularly on  
the condenser and evaporator fins,  
could cause product malfunction or  
inefficient operation.  
■ Operational  
Do not expose the skin directly to cool air for  
long periods of time.  
(Don't sit in the draft.)  
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  
refrigeration system.  
• This could harm to your health.  
• There is risk of damage or loss of property.  
Do not block the inlet or outlet Use a soft cloth to clean. Do  
Do not touch the metal parts of  
the product when removing the  
air filter. They are very sharp!  
of air flow.  
not use harsh detergents, sol-  
vents, etc.  
• It may cause product failure.  
• There is risk of fire, electric shock, • There is risk of personal injury.  
or damage to the plastic parts of  
the product.  
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Safety Precautions  
Do not step on or put anyting  
on the product. (outdoor  
units)  
Always insert the filter secure- Do not insert hands or other  
ly. Clean the filter every two  
weeks or more often if neces-  
sary.  
objects through the air inlet or  
outlet while the product is  
operated.  
• There is risk of personal injury and • A dirty filter reduces the efficiency  
• There are sharp and moving parts  
failure of product.  
of the air conditioner and could  
cause product malfunction or dam-  
age.  
that could cause personal injury.  
Do not drink the water drained Use a firm stool or ladder  
Replace the all batteries in the  
remote control with new ones  
of the same type. Do not mix  
old and new batteries or dif-  
ferent types of batteries.  
from the product.  
when cleaning or maintaining  
the product.  
• It is not sanitary and could cause  
• Be careful and avoid personal  
• There is risk of fire or explosion  
serious health issues.  
injury.  
Do not recharge or disassemble the batteries.  
Do not dispose of batteries in a fire.  
If the liquid from the batteries gets onto your  
skin or clothes, wash it well with clean water.  
Do not use the remote if the batteries have  
leaked.  
• They may burn or explode.  
• The chemicals in batteries could cause burns or other  
health hazards.  
10 Multi type Air Conditioner  
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Dimensions  
Dimensions  
Indoor Unit  
1. Split Type Indoor  
2. Art Cool Type Indoor Unit  
W
D
H
H
D
W
Pipe Hole  
Hanger Hole  
Fix Hole  
Installation plate  
Split Type  
ARTCOOL Type  
SP3  
Model  
S4  
SE  
Dimension  
9 kBtu/h  
840  
12 kBtu/h  
9 kBtu/h  
12 kBtu/h  
W
H
mm  
mm  
mm  
895  
282  
165  
570  
568  
129  
270  
D
153  
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Dimensions  
Outdoor Unit  
W
Gas side  
3-way valve  
Liquid side  
2-way valve  
L9  
L7  
L6  
L8  
MODEL  
UE2 36k  
DIM  
W
mm  
mm  
mm  
mm  
mm  
mm  
mm  
mm  
mm  
mm  
mm  
mm  
mm  
mm  
870  
1038  
320  
360  
340  
25  
H
D
L1  
L2  
L3  
L4  
L5  
L6  
L7  
L8  
L9  
L10  
L11  
1035  
25  
546  
160  
160  
44  
64.5  
50  
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Product Specifications  
Product Specifications  
Indoor Unit  
Indoor Unit Type  
Wall Mounted  
Model  
AMNC093D4A0(LMN090CE)  
AMNH093D4A0(LMN090HE) AMNC123DEA0(LMN120CE) AMNH123DEA0(LMN120HE)  
Nominal Cooling Capacity  
Nominal Heating Capacity  
Air Circulation  
■
kcal/h(W)  
Btu/h  
2,267(2,637)  
2,267(2,637)  
9,000  
3,023(3,516)  
3,023(3,516)  
12,000  
9,000  
12,000  
■
kcal/h(W)  
Btu/h  
-
2,267(2,637)  
9,000  
-
3,023(3,516)  
12,000  
-
8.2(289)  
-
9.4(332)  
H/M/L  
CMM(CFM)  
°C  
8.2(289)  
9.4(332)  
Setting temperature range(cool/heat)  
18~30  
16~30  
18~30  
16~30  
Fan motor  
Output  
W
15  
15  
15  
15  
Model  
DL-88430LGIF  
DC36  
DL-88430LGIF  
DC36  
DL-88430LGIF  
DC36  
DL-88430LGIF  
DC36  
Input  
V
A
Running Current  
Type  
0.15  
0.15  
0.15  
0.15  
Fan  
Cross Flow Fan  
1/3.74(95)  
31 / 29 / 22  
Thermistor  
0.197(5.0)  
20  
Cross Flow Fan  
1/3.74(95)  
31 / 29 / 22  
Thermistor  
0.197(5.0)  
20  
Cross Flow Fan  
1/3.74(95)  
36 / 32 / 29  
Thermistor  
0.197(5.0)  
18  
Cross Flow Fan  
1/3.74(95)  
36 / 32 / 29  
Thermistor  
0.197(5.0)  
18  
No. Used / Diameter  
EA/inch(mm)  
dBA  
Noise Level (Sound Press,1m) H/M/L  
Temperature controller  
Coil  
Tube Size (OD)  
inch(mm)  
Fins per inch  
No. of Rows & Column  
2R,15C  
2R,15C  
2R,15C  
2R,15C  
Dehumidification Rate  
Dimensions (W*H*D)  
Net Weight  
l/h  
-
1.1  
-
1.2  
inch(mm)  
kg(lbs)  
33.0*10.6*6.0(840*270*153)  
7(15.4)  
33.0*10.6*6.0(840*270*153)  
7(15.4)  
35.2*11.1*6.5(895*282*165)  
9.5(20.9)  
35.2*11.1*6.5(895*282*165)  
9.5(20.9)  
Piping Connection  
Liquid  
inch(mm)  
inch(mm)  
mm  
1/4 (6.35)  
3/8 (9.52)  
20  
1/4 (6.35)  
3/8 (9.52)  
20  
1/4 (6.35)  
3/8 (9.52)  
20  
1/4 (6.35)  
3/8 (9.52)  
20  
Gas  
Drain hose (ID Ø)  
Packing Dimension (W*H*D)  
inch(mm)  
20/40ft(hi-c)  
35.7*13.1*8.8(906*332*223)  
440/910 (1091)  
35.7*13.1*8.8(906*332*223)  
440/910 (1091)  
38.3*9.1*14.6(973*231*372)  
353/719 (792)  
38.3*9.1*14.6(973*231*372)  
353/719 (792)  
Stuffing Quantity  
With(Without) S/Parts  
Indoor Unit Type  
Model  
Artcool  
AMNC093APM0(LMAN090CNS)  
AMNH093APM0(LMAN090HNS)  
AMNC123APM0(LMAN120CNS)  
AMNH123APM0(LMAN120HNS)  
Nominal Cooling Capacity  
Nominal Heating Capacity  
Air Circulation  
■
kcal/h(W)  
Btu/h  
2,267(2,637)  
2,267(2,637)  
9,000  
3,023(3,516)  
3,023(3,516)  
12,000  
9,000  
12,000  
■
kcal/h(W)  
Btu/h  
-
2,267(2,637)  
9,000  
-
3,023(3,516)  
12,000  
-
7.5(264)  
18~30  
-
8.5(300)  
18~30  
H/M/L  
CMM(CFM)  
°C  
7.5(264)  
16~30  
8.5(300)  
16~30  
Setting temperature range(cool/heat)  
Fan motor  
Output  
W
24  
24  
24  
24  
Model  
DL-89812LGIB  
DL-89812LGIB  
DL-89812LGIB  
DL-89812LGIB  
No. of Poles  
Input  
V
A
DC36  
1.5  
DC36  
1.5  
DC36  
1.5  
DC36  
1.5  
Running Current  
Type  
Fan  
Turbo Fan  
1/24.32(617.7)  
37 / 31 / 27  
Thermistor  
0.197(5.0)  
20  
Turbo Fan  
1/24.32(617.7)  
37 / 31 / 27  
Thermistor  
0.197(5.0)  
20  
Turbo Fan  
1/24.32(617.7)  
43 / 39 / 31  
Thermistor  
0.197(5.0)  
20  
Turbo Fan  
1/24.32(617.7)  
43 / 39 / 31  
Thermistor  
0.197(5.0)  
20  
No. Used / Diameter  
EA/inch(mm)  
dBA  
Noise Level (Sound Press,1m) H/M/L  
Temperature controller  
Coil  
Tube Size (OD)  
inch(mm)  
Fins per inch  
No. of Rows & Column  
2R,20C  
2R,20C  
2R,20C  
2R,20C  
Dehumidification Rate  
Dimensions (W*H*D)  
Net Weight  
l/h  
-
1.1  
-
1.4  
inch(mm)  
kg(lbs)  
22.4*22.4*5.1(570*568*129)  
9(19.84)  
22.4*22.4*5.1(570*568*129)  
9(19.84)  
22.4*22.4*5.1(570*568*129)  
9(19.84)  
22.4*22.4*5.1(570*568*129)  
9(19.84)  
Piping Connection  
Liquid  
inch(mm)  
inch(mm)  
mm  
1/4 (6.35)  
1/4 (6.35)  
1/4 (6.35)  
1/4 (6.35)  
Gas  
3/8 (9.52)  
3/8 (9.52)  
3/8 (9.52)  
3/8 (9.52)  
Drain hose (ID Ø)  
20  
20  
20  
20  
Packing Dimension (W*H*D)  
Stuffing Quantity With(Without) S/Parts  
inch(mm)  
20/40ft(hi-c)  
26.2*25.7*9.1(665*653*231)  
237/534(239/539)  
26.2*25.7*9.1(665*653*231)  
237/534(239/539)  
26.2*25.7*9.1(665*653*231)  
237/534(239/539)  
26.2*25.7*9.1(665*653*231)  
237/534(239/539)  
Note : 1.  
■
See the page "Combination Table"  
2. Due to our policy of innovation some specifications may be changed without notification.  
Service Manual 13  
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Product Specifications  
Outdoor Unit - Multiple piping models  
A3UC363FA0(LMU360CE)  
A3UH363FA0(LMU360HE)  
Model  
9,000~36,000  
9,000~36,000  
Cooling Capacity■  
Btu/hr  
W
2637~10,550  
2637~10,550  
2267~9071  
2267~9071  
kcal/hr  
Btu/hr  
W
-
9,000~36,000  
Heating Capacity■  
-
2637~10,550  
-
2267~9071  
kcal/hr  
W
1320~3680  
1320~3680  
Input■  
Cooling  
Heating  
Cooling  
Heating  
-
1410~3340  
W
5.9~16.6  
5.9~16.6  
Running Current■(208/230V)  
Power Supply  
A
-
6.3~15.0  
A
1,208/230,60  
1,208/230,60  
Ø,V,Hz  
3
3
Max. Number of Connectable Indoor Units  
Rotary  
Rotary  
Compressor  
(Constant)  
Type  
GK141K  
GK141K  
Model  
2 Pole Induction(PSC)  
2 Pole Induction(PSC)  
Motor Type  
Quantity  
1
1
Ea  
W
1430  
1430  
Motor Input  
Oil Charge  
Oil Type  
350Å}10  
350Å}10  
cc  
FVC68D  
FVC68D  
35 / 370  
35 / 370  
Capacitor  
µF/Vac  
External Type  
External Type  
O.L.P Type(model name)  
Type  
Rotary  
Rotary  
Compressor  
(Constant)  
GJ230K  
GJ230K  
Model  
2 Pole Induction(PSC)  
2 Pole Induction(PSC)  
Motor Type  
Quantity  
1
1
Ea  
W
2370  
2370  
Motor Input  
Oil Charge  
Oil Type  
700±10  
7000±10  
cc  
FVC68D  
FVC68D  
50 / 400  
50 / 400  
Capacitor  
µF/Vac  
g(oz)  
Internal Type  
Internal Type  
O.L.P Type(model name)  
Charge  
2400  
2400  
Refrigerant charge  
Coil  
R410A  
R410A  
Type  
L.E.V  
L.E.V  
Control  
0.276(7.0)  
0.276(7.0)  
Tube Size (OD)  
Fins per inch  
No. of Rows & Column/No.  
Model  
inch(mm)  
18  
18  
2R,48C  
2R,48C  
ARC286B01 * 2  
ARC286B01 * 2  
Fan motor  
Fan  
102  
102  
Output  
W
2/370  
2/370  
Capacitor  
µF/Vac  
Propeller  
Propeller  
Type  
2 / 15.7(400)  
2 / 15.7(400)  
No. Used / Diameter  
Discharge  
Outdoor  
EA/inch(mm)  
Side / Top  
Side  
Side  
63(2225)  
63(2225)  
Air Circulation  
CMM(CFM)  
51  
51  
Noise Level(H/L) at 230V Sound Press,1m  
dB(A)  
1
1/4 (6..35) * 3EA  
1/4 (6..35) * 3EA  
SVC Valve  
Liquid  
Gas  
inch(mm)  
3/8 (9.52) * 3EA  
3/8 (9.52) * 3EA  
34.3*41.7*12.6 (870*1060*320)  
34.3*41.7*12.6 (870*1060*320)  
Dimensions  
Net Weight  
W*H*D  
Outdoor  
inch(mm)  
kg(lbs)  
m
80(176)  
80(176)  
45  
45  
Max. Interunit Piping Length Total of Each Room  
For One Room  
15  
15  
m
7.5  
7.5  
Max. Installation  
Height Difference  
Packing Dimension  
Stuffing Quantity  
Indoor Unit~Outdoor Unit  
Indoor Unit~Indoor Unit  
W*H*D  
m
7.5  
41.1*44.9*17.3 (1045*1140*440)  
51/111  
7.5  
41.1*44.9*17.3 (1045*1140*440)  
51/111  
m
inch(mm)  
20/40ft  
Notes: 1. Capacities are based on the following conditions:  
Cooling: -Indoor Temperature 26.7°C(80.1°F)DB/19.4°C66.9°F)WB  
-Outdoor Temperature 35°C(95°F)DB/23.9°C(75°F)WB  
-Interconnecting Piping Length 7.5m  
-Level Difference of Zero.  
Heating: -Indoor Temperature 21.1°C(70°F)DB/15.6°C(60.1°F)WB  
-Outdoor Temperature 8.3°C(46.94°F)DB/6.1°C(42.98°F)WB  
-Interconnecting Piping Length 7.5m  
-Level Difference of Zero.  
2. Capacities are Net Capacities.  
3.  
■
: See the page "Combination Table"  
4. Due to our policy of innovation some specifications may be changed without notification.  
14 Multi type Air Conditioner  
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Installation  
Installation  
Read carefully, and then follow step by step.  
Installation Parts  
Installation plate  
Type "A" screw and plastic anchor  
Remote Control Holder  
Type "B" screw  
Installation Tools  
Figure  
Name  
Figure  
Name  
Screw driver  
Electric Drill  
Ohmmeter  
Hexagonal wrench  
Measuring Tape, Knife  
Hole Core Drill  
Ammeter  
Gas Leak Detector  
Thermometer,  
Level  
Spanner  
Torque wrench  
Flaring Tool Set  
Service Manual 15  
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Installation  
Select the best location  
Indoor unit  
1. Do not have any heat or steam near the unit.  
More than 5cm  
(2.0 inch)  
2. Select a place where there are no obstacles in front  
of the unit.  
More than 5cm  
(2.0 inch)  
3. Make sure that condensation drainage can be conve-  
niently routed away.  
More than 2.3m  
(90.6 inch)  
4. Do not install near a doorway.  
5. Ensure the spaces indicated by arrows from the wall,  
ceiling, fence or other obstacles.  
More than 5cm  
(2.0 inch)  
6. Use a stud finder to locate studs to prevent unneces-  
sary damage to the wall.  
More than 10cm  
More than 50cm  
CAUTION: Install the indoor unit  
on the wall where the height from  
the floors more than 2.3m(7.5ft).  
More than 50cm  
More than 2m  
Outdoor unit  
1. If an awning is built over the unit to prevent direct  
sunlight or rain exposure, make sure that heat radia-  
tion from the condenser is not restricted.  
more than 30cm  
(11.8 inch)  
2. Ensure that the spaces indicated by arrows around  
front, back and side of the unit.  
more than 30cm  
(11.8 inch)  
3. Do not place animals and plants in the path of the  
warm air.  
4. Take the air conditioner weight into account and  
select a place where noise and vibration are mini-  
mum.  
more than 70cm  
(27.6 inch)  
5. Select a place so that the warm air and sound from  
the air conditioner do not disturb neighbors.  
Rooftop Installations:  
If the outdoor unit is installed on a roof structure, be  
sure to level the unit. Ensure the roof structure and  
anchoring method are adequate for the unit location.  
Consult local codes regarding rooftop mounting.  
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Installation  
Piping length and elevation  
Multi Piping Type  
Max Elevation  
between each  
indoor unit and out-  
door unit (h1)  
Max total length of  
all pipes  
(A+B/A+B+C)  
Max elevation  
between indoor  
units (h2)  
Max length of each Min length of each  
Capacity(Btu/h)  
36k  
pipe (A/B/C)  
pipe (A/B/C)  
45m(150ft)  
15m(50ft)  
3m(10ft)  
7.5m(25ft)  
7.5m(25ft)  
Pipe Size  
Indoor Capacity  
(Btu/h)  
Gas  
Liquid  
Standard Length  
Additional Refrigerant  
9K  
3/8"  
3/8"  
1/4"  
1/4"  
7.5m(25ft)  
7.5m(25ft)  
20g/m(0.32oz/ft)  
20g/m(0.32oz/ft)  
12K  
A
h2  
h2  
B
h1  
C
h1  
h1  
CAUTION: Capacity is based on standard length and maximum allowance length is on the  
basis of reliability. Oil trap should be installed every 5~7 meters (16.4~23.0ft).  
Service Manual 17  
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Installation  
Fixing Installation Plate(Standard Type)  
The wall you select should be strong and solid enough to  
prevent vibration  
Installation Plate  
1. Mount the installation plate on the wall with  
type "A" screws. If mounting the unit on a concrete wall,  
use anchor bolts.  
• Mount the installation plate horizontally by aligning the  
centerline using a level.  
Chassis  
Hook  
Type "A" screw  
2. Measure the wall and mark the centerline. It is also  
important to use caution concerning the location of the  
installation plate-routing of the wiring to power outlets is  
through the walls typically. Drilling the hole through the  
wall for piping connections must be done safely.  
Installation plate  
B
Distance (mm)  
D
CHASSIS  
(Grade)  
A
B
C
D
A
C
Ø70mm  
Ø70mm  
S4  
SE  
50  
65  
105  
110  
59  
85  
105  
110  
Left rear piping  
Right rear piping  
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Installation  
Preparing work for Installation (Artcool Type Only)  
Open panel front  
1. First, push the front panel backward and lift it up to remove the two screws.  
2. The moment of lifting the both lower parts of panel front, you can hear sound this panel came out, In this time panel front is  
separated  
3. After pull down this panel a bit, and separate connecting wire with product.  
Panel Front  
Connector  
Remove cover pipe and cover side  
1. Remove two screws(for fixing cover pipe)  
2. Pull up the cover side of desired connecting direction, then cover  
side is separated.  
3. In case of connecting direction is left or right, path through the  
hole of cover side.  
Pipe hole  
CAUTION: After removing the pipe hole, cut the  
burr for safety.  
NOTICE  
When connecting pipe path through rear  
wall, don’t remove the hole.  
Drain hose junction  
1. Remove the rubber stopple of desired direction of  
drainage.  
2. As the following picture, Insert drain hose in the  
handle of drain pan, and join drain hose and con-  
necting hose.  
Adhesive  
Only one  
desiring direction  
Connecting  
part  
Drain  
hose  
rubber cap  
Service Manual 19  
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Installation  
■ Sticking the installation guide map and  
fixing Indoor unit  
1. Put an Installation Guide Map on the desired  
surface.  
7. Drill the piercing part for connecting pipe as  
diameter 50mm. (In case of piercing rear surface)  
INSTALLATION GUIDE MAP  
Refer to No. 5 on this page when making a hole in the wall.  
2. Make a hole with diameter of 6mm and depth of  
8. First, Drive the two points of the upper parts by  
screws. (Leave 10mm for hanging product)  
30-35mm when piercing a screw point.  
INST  
AIIA  
TION G  
UIDE MAP  
INST  
ALLA  
TION GU  
3. Drive the fore plastic anchors into drilled points.  
IN  
S
T
A
L
L
A
9. Drive the lower parts after facing the hole of  
product with plastic anchors, and fix completely  
the upper screws.  
T
IO  
N
G
U
ID  
E
M
A
P
Plastic anchors  
Plastic anchors  
4. Hang the hole of product at the upper screws.  
(In this time, Remove the map)  
In case of nothing wrong in the matter,  
connect the pipe and the wire.  
(Installation manual reference)  
INST  
ALLA  
(Falling attention)  
TION GUIDE MAP  
Hanger hole  
(Rear side of  
product)  
■ Drill a hole in the wall  
5. Check the fixed product with light power.  
• Drill the piping hole with a ø50mm hole core drill. Drill  
the piping hole at either the right or the left with the hole  
slightly slanted to the outdoor side.  
WALL  
Indoor  
Outdoor  
6. Look at suited horizon by horizontal meter on  
the horizontal setting line, and Fix lightly the  
map by adhesive tape.  
IN  
S
T
A
L
L
A
T
Horizontality  
IO  
N
G
U
ID  
E
M
A
P
20 Multi type Air Conditioner  
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Flaring Work and Connection of Piping  
Flaring Work and Connection of Piping  
Flaring work  
Main cause for gas leakage is due to defect in flaring work. Carry out correct flaring work in the following procedure.  
Cut the pipes and the cable.  
1. Use the piping kit accessory or the pipes purchased locally.  
2. Measure the distance between the indoor and the outdoor unit.  
Copper  
pipe  
Slanted Uneven Rough  
90°  
3. Cut the pipes a little longer than measured distance.  
4. Cut the cable 1.5m (5.0ft) longer than the pipe length.  
Burrs removal  
1. Completely remove all burrs from the cut cross section of  
pipe/tube.  
2. Put the end of the copper tube/pipe in a downward direction  
as you remove burrs in order to avoid dropping burrs into the  
tubing.  
Pipe  
Reamer  
Point down  
Putting nut on  
• Remove flare nuts attached to indoor and outdoor unit, then  
put them on pipe/tube having completed burr removal.  
(not possible to put them on after flaring work)  
Flare nut  
Copper tube  
Flaring work  
• Carry out flaring work using flaring tool as shown below.  
• Firmly hold copper pipe in a die in the dimension shown in the  
table above.  
Outside diameter  
A
Handle  
Yoke  
mm  
Ø6.35  
inch  
1/4  
mm  
0~0.5  
0~0.5  
Bar  
Bar  
Ø9.52  
3/8  
Cone  
Copper pipe  
Clamp handle  
Red arrow mark  
Service Manual 21  
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Flaring Work and Connection of Piping  
Check  
Smooth all round  
1. Compare the flared work with the figure by.  
Inside is shiny without scratches  
2. If a flared section is defective, cut it off and do flaring work  
again.  
= Improper flaring =  
Inclined Surface Cracked Uneven  
damaged  
thickness  
Even length  
all round  
Connecting the Piping  
Indoor  
1. Prepare the indoor unit's piping and drain hose for installation through the wall.  
2. Remove the plastic tubing retainer(see the illustration by)  
and pull the tubing and drain hose away from chassis.  
3. Replace only the plastic tubing holder 1, not the holder 2 in  
the original position.  
For right rear piping  
1. Route the indoor tubing and the drain hose in the direction  
of rear right.  
2. Insert the connecting cable into the indoor unit from the out-  
door unit through the piping hole.  
• Do not connect the cable to the indoor unit.  
•
Make a small loop with the cable for easy connection later.  
Drain hose  
3. Tape the tubing, drain hose, and the connecting cable. Be  
sure that the drain hose is located at the lowest side of the  
bundle. Locating at the uper side can cause drain pan to  
overflow inside the unit.  
Drain hose  
If the drain hose is routed inside the room, insulate the hose  
with an insulation material* so that dripping from "sweat-  
ing"(condensation) will not damage furniture or floors.  
*Foamed polyethylene or equivalent is recommended.  
Tape  
Connecting  
pipe  
Drain hose  
Connecting cable  
Loop  
Gas side piping  
Connecting  
cable  
Liquid side piping  
Drain hose  
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Flaring Work and Connection of Piping  
4. Indoor unit installation  
Hook the indoor unit onto the upper portion of the installa-  
tion plate.(Engage the two hooks of the rear top of the  
indoor unit with the upper edge of the installation plate.)  
Ensure that the hooks are properly seated on the installa-  
tion plate by moving it left and right.  
Connecting  
cable  
Drain hose  
Press the lower left and right sides of the unit against the  
installation plate until the hooks engage into their  
slots(clicking sound).  
Connecting the piping to the indoor unit and drain hose  
to drain pipe.  
1. Align the center of the pipes and sufficiently tighten the  
flare nut by hand.  
2. Tighten the flare nut with a wrench.  
Indoor unit tubing  
Flare nut Pipes  
Outside diameter  
Torque  
.
mm  
Ø6.35  
Ø9.52  
inch  
1/4  
3/8  
kg m  
Open-end wrench (fixed)  
1.8  
4.2  
Flare nut  
Wrench  
Connection pipe  
3. When extending the drain hose at the indoor unit, install  
the drain pipe.  
Indoor unit tubing  
Drain pipe  
Indoor unit drain hose  
Vinyl tape(narrow)  
Wrap the insulation material around the connecting por-  
tion.  
Adhesive  
1. Overlap the connection pipe insulation material and the  
indoor unit pipe insulation material. Bind them together  
with vinyl tape so that there may be no gap.  
Plastic bands  
Insulation material  
2. Wrap the area which accommodates the rear piping hous-  
ing section with vinyl tape.  
Indoor unit pipe  
Wrap with vinyl tape  
Connection pipe  
Vinyl tape (wide)  
Connecting cable  
3. Bundle the piping and drain hose together by wrapping  
them with vinyl tape for enough to cover where they fit into  
the rear piping housing section.  
Pipe  
Vinyl tape(narrow)  
Wrap with vinyl tape  
Pipe  
Vinyl tape(wide)  
Drain hose  
Service Manual 23  
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Flaring Work and Connection of Piping  
For left rear piping  
1. Route the indoor tubing and the drain hose to the required  
piping hole position.  
1
2
Connecting  
cable  
2. Insert the piping, drain hose, and the connecting cable into  
the piping hole.  
3. Insert the connecting cable into the indoor unit.  
• Don't connect the cable to the indoor unit.  
• Make a small loop with the cable for easy connection  
later.  
Drain pipe  
4. Tape the drain hose and the connecting cables.  
5. Indoor unit installation  
• Hang the indoor unit from the hooks at the top of the  
installation plate.  
• Insert the spacer etc. between the indoor unit and the  
installation plate and separate the bottom of the indoor  
unit from the wall.  
Indoor unit  
Spacer  
Installation plate  
8cm  
Connecting the piping to the indoor unit and the drain  
hose to drain pipe.  
1. Align the center of the pipes and sufficiently tighten the  
flare nut by hand.  
Indoor unit tubing  
Flare nut Pipes  
2. Tighten the flare nut with a wrench.  
Outside diameter  
Torque  
.
mm  
Ø6.35  
Ø9.52  
inch  
1/4  
3/8  
kg m  
1.8  
4.2  
Open-end wrench (fixed)  
Flare nut  
Wrench  
Connection pipe  
3. When extending the drain hose at the indoor unit, install  
the drain pipe.  
Indoor unit tubing  
Drain hose  
Indoor unit drain hose  
Vinyl tape (narrow)  
Adhesive  
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Flaring Work and Connection of Piping  
Wrap the insulation material around the connecting por-  
tion.  
Plastic bands  
Insulation material  
1. Overlap the connection pipe heat insulation and the indoor  
unit pipe heat insulation material. Bind them together with  
vinyl tape so that there may be no gap.  
2. Wrap the area which accommodates the rear piping hous-  
ing section with vinyl tape.  
Indoor  
unit piping  
Connection  
pipe  
Vinyl tape  
(wide)  
Wrap with vinyl tape  
Pipe  
Vinyl tape(narrow)  
Connecting cable  
Drain hose  
3. Bundle the piping and drain hose together by wrapping  
them with cloth tape over the range within which they fit  
into the rear piping housing section.  
Pipe  
Vinyl tape(narrow)  
Wrap with  
vinyl tape(wide)  
Reroute the pipings and the drain hose across the back  
of the chassis.  
Indoor unit installation  
1. Remove the spacer.  
Piping for  
passage through  
piping hole  
2. Ensure that the hooks are properly seated on the installa-  
tion plate by moving it left and right.  
3. Press the lower left and right sides of the unit against the  
installation plate until the hooks engage into their  
slots(clicking sound).  
Connecting  
cable  
Drain hose  
Service Manual 25  
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Flaring Work and Connection of Piping  
■ Panel Assembly(Art Cool Type only)  
1. First, Check the side cover assembly exactly, Fix  
power cord in the bottom groove of cover side  
left.  
2. Assemble connecting lead wire with controller  
and first fix the upper part of panel front, then  
match the lower part of panel front  
Panel Front  
Connector  
3. Drive two screws.  
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Flaring Work and Connection of Piping  
Installation Information. For left piping. Follow the instruction below.  
Good case  
• Press on the upper side of clamp and unfold the tubing to downward slowly.  
Bad case  
• Following bending type from right to left may cause damage to the tubing.  
Service Manual 27  
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Flaring Work and Connection of Piping  
REMOTE CONTROL PREPARATION(OPTIONAL)  
HOW TO MOUNT ONTO A WALL  
HOW TO INSERT BATTERIES  
Remove the battery cover from the remote con-  
troller.  
• Slide the cover according to the arrow direction.  
• Do not use rechargeable batteries,  
such batteries differ from standard dry  
cells in shape, dimensions, and per-  
formance.  
• Romove the batteries from the remote  
controller if the air conditioner is not  
going to be used for some long time.  
Insert the two batteries.  
• Be sure that the (+) and (-) directions are correct.  
• Be sure that both batteries are new.  
Re-attach the cover.  
• Slide it back into position.  
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Flaring Work and Connection of Piping  
Outdoor  
Align the center of the pipings and sufficiently tighten the flare  
nut by hand.  
Finally, tighten the flare nut with torque wrench until the  
wrench clicks.  
Outdoor unit  
• When tightening the flare nut with torque wrench, ensure  
the direction for tightening follows the arrow on the wrench.  
Outside diameter  
Torque  
.
mm  
Ø6.35  
inch  
1/4  
kg m  
A-UNIT  
Gas side piping  
1.8  
4.2  
Ø9.52  
3/8  
B-UNIT  
Liquid side piping  
C-UNIT  
Torque wrench  
Service Manual 29  
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Connecting the Cable between Indoor Unit and Outdoor Unit  
Connecting the Cable between Indoor Unit and Outdoor Unit  
Connect the cable to the Indoor unit.  
Connect the cable to the indoor unit by connecting the wires to the terminals on the control board individually  
according to the outdoor unit connection. (Ensure that the color of the wires of the outdoor unit and the terminal No. are  
the same as those of the indoor unit.)  
The earth wire should be longer than the common wires.  
The circuit diagram is not subject to change without notice.  
When installing, refer to the electrical diagram behind the front panel of Indoor Unit.  
The wiring for the outdoor unit can be found on the inside of the Outdoor Unit control cover.  
RECOMMAND:  
• The circuit diagram is not subject to change without notice.  
• Be sure to connect wires according to the wiring diagram.  
• Connect the wires firmly, so that not to be pulled out easily.  
• Connect the wires according to color codes by referring to the wiring diagram.  
RECOMMAND: Provide a circuit breaker  
Main power source  
between power source and the outdoor  
unit as shown below.  
Air  
Circuit Breaker  
Conditioner  
Use a circuit breaker  
or time delay fuse.  
RECOMMAND: The power cord connected to the outdoor unit should be complied with the following  
specifications (ETL recognized and CSA certified).  
AWG14  
Line voltage (208~230V)  
The power connecting cable connected to the indoor and outdoor unit should be complied with the  
following specifications (ETL recognized and CSA certified).  
AWG18  
Low voltage (below 40V)  
RECOMMAND: When using the separate wire as the power cord, please fix the separate wire into the  
control box panel by using tie wrap as the fixture.  
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Connecting the Cable between Indoor Unit and Outdoor Unit  
Connect the cable to the Outdoor unit.  
1. Remove the cover control from the unit by loosening the  
screw.  
Outdoor unit  
Connect the wires to the terminals on the control board  
individually as the following.  
Terminal block  
Over 5mm  
2. Secure the cable onto the control board with the holder  
(clamper).  
Holder for  
power supply  
cord  
3. Refix the cover control to the original position with the  
screw.  
Power supply  
cable  
36k Outdoor side  
A-UNIT  
B-UNIT  
C-UNIT  
1
2
3
4
1
2
3
4
1
2
3
4
Cover control  
Connecting  
cable  
Connecting cable(Low voltage)  
L
N
1
2
3
4
1
2
3
4
1
2
3
4
Terminal BLOCK  
Terminal BLOCK  
Terminal BLOCK  
Power Source  
208/230V AC  
(High voltage)  
Indoor A-UNIT  
Indoor B-UNIT Indoor C-UNIT  
NOTICE  
:
1. Separately wire the high and low voltage line.  
2. Use heat-proof electrical wiring capable of withstanding temperature up to 75°C(167°F).  
3. Use outdoor and waterproof connection cable rated more than 300V for the connection between indoor and outdoor unit.  
(For example, Type SJO-WA)  
WARNING:  
• Be sure to comply with local codes while running the wire from the indoor unit to the outdoor unit(size of  
wire and wiring method, etc).  
• Every wire must be connected firmly.  
• No wire should be allowed to touch refrigerant tubing, the compressor or any moving parts.  
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Connecting the Cable between Indoor Unit and Outdoor Unit  
Connection method of the connecting cable(Example)  
(1) Remove two-caps on the conduit panel.  
(2) Make a hole appropriate for the passage of connection cable  
through on cap by tool.  
(for low voltage line)  
Terminal  
block  
(3) Pass the connecting cable through the hole.  
(4) Properly connect the cable on the terminal block.  
(5) Fix the connection cable with cord clamp provided on the unit  
not to have strain at the terminal when the connection cable is  
pulled outside up to a 35 pound weight.  
Cord clamp  
Cap(Reuse)  
G
Lock nut  
(6) Wind the vinyl tape round the connecting cable for sealing  
between the surface of the connection cable and cap.  
(7)Finally, Fix the cap to the conduit panel.  
Hole  
(for low voltage line)  
Cap(Remove)  
Taping  
WARNING: Loose wiring may cause the termi-  
nal to overheat or result in unit malfunction. A  
fire hazard may also exist. Therefore, be sure  
all wiring is tightly connected.  
(for sealing)  
Power supply line Conduit panel  
(1ø, 230/208V)  
Low voltage line  
(connecting cable)  
When connecting each power wire to the corresponding terminal,  
follow instructions "How to connect wiring to the terminals" and  
fasten the wire tightly with the fixing screw of the terminal plate.  
High voltage  
Strand wire  
How to connect wiring to the terminals  
■■For strand wiring  
Round  
terminal  
(1) Cut the wire end with a wire cutter or wire-cutting pliers,  
then strip the insulation to expose the strand wiring about  
10mm(3/8").  
(2) Using a screwdriver, remove the terminal screw(s) on the  
terminal plate.  
(3) Using a round terminal fastener or pliers, securely clamp  
each stripped wire end with a round terminal.  
(4) Position the round terminal wire, and replace and tighten  
the terminal screw using a screwdriver.  
Low voltage  
Loosening the  
terminal block  
screw  
Fastening the  
wire tightly  
Connecting cable  
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Connecting the Cable between Indoor Unit and Outdoor Unit  
CAUTION: Provide a circuit breaker between power source and the unit as shown  
below.  
Main power source  
Air  
Fuse or breaker  
Model  
36k  
Power source  
Circuit Breaker  
Use a circuit  
breaker or time  
delay fuse.  
Conditioner  
Capacity  
1Ø, 230/208V  
40A  
Connect the cable to the indoor unit  
1. Connect the wires to the terminals on the control board  
individually according to the outdoor unit connection.  
• Ensure that the color of the wires of outdoor unit and the  
terminal No. are the same as those of indoor unit respec-  
tively.  
Connecting cable  
2. Attach the Grille onto the cabinet.  
• Grasp the lower left and right side of the Grille and  
engage four tabs on the top inside edge of the chassis.  
• Press the Grille toward the chassis until it will be back into  
place.  
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Checking the Drainage, Forming the Pipings and Long Pipe Setting  
Checking the Drainage, Forming the Pipings and Long Pipe Setting  
Checking the drainage  
To check the drainage.  
1. Pour a glass of water on the evaporator.  
2. Ensure the water flows through the drain hose of the  
indoor unit without any leakage and goes out the drain exit.  
Drain piping  
1. The drain hose should point downward for easy drain flow.  
Downward slope  
2. Do not make drain piping.  
Accumulated  
drain water  
Do not raise  
Less than  
50mm gap  
Tip of drain hose  
dipped in water  
Air  
Water  
leakage  
Water  
leakage  
Water  
leakage  
Waving  
Ditch  
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Checking the Drainage, Forming the Pipings and Long Pipe Setting  
Forming the piping  
Form the piping by wrapping the con-  
necting portion of the indoor unit with  
insulation material and secure it with  
Seal a small  
opening around  
the pipings with  
gum type sealer.  
Taping  
Drain hose  
two kinds of vinyl tape.  
• If you want to connect an additional drain hose, the end  
of the drain outlet should be routed above the ground.  
Secure the drain hose appropriately.  
Plastic  
band  
Pipings  
Connecting  
cable  
In cases where the outdoor unit is  
installed below the indoor unit perform  
the following.  
1. Tape the piping, drain hose and connecting cable from  
Power supply  
cord  
down to up.  
2. Secure the tapped piping along the exterior wall using  
saddle or equivalent.  
• Trap is required to prevent water from entering  
into electrical parts.  
In cases where the Outdoor unit is  
installed above the Indoor unit perform  
the following.  
1. Tape the piping and connecting cable from down to up.  
2. Secure the taped piping along the exterior wall. Form a  
trap to prevent water entering the room.  
Seal a small opening  
around the pipings  
with gum type sealer.  
Trap  
3. Fix the piping onto the wall by saddle or equivalent.  
Trap  
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Air Purging and Evacuation  
Air Purging and Evacuation  
Air and moisture remaining in the refrigerant system have undesirable effects as indicated below.  
1. Pressure in the system rises.  
2. Operating current rises.  
3. Cooling(or heating) efficiency drops.  
4. Moisture in the refrigerant circuit may freeze and block capillary tubing.  
5. Water may lead to corrosion of parts in the refrigeration system.  
Therefore, the indoor/outdoor unit and connecting tube must be checked for leak tight, and vacuumed to remove incondensi-  
ble gas and moisture in the system.  
Checking method  
1. Do a leakage test of all joints of the tubing(both indoor and  
outdoor) and both gas and liquid side service valves.  
Bubbles indicate a leak. Be sure to wipe off the soap with a  
clean cloth.  
Preparation  
• Check that each tube(both liquid and gas side tubes) between  
the indoor and outdoor units have been properly connected and  
all wiring for the test run has been completed. Remove the ser-  
2. After the system is found to be free of leaks, relieve the  
nitrogen pressure by loosening the charge hose connector  
at the nitrogen cylinder. When the system pressure is  
reduced to normal, disconnect the hose from the cylinder.  
vice valve caps from both the gas and the liquid side on the out-  
door unit. Check that both the liquid and the gas side service  
valves on the outdoor unit are kept closed at this stage.  
Leakage test  
• Connect the manifold valve(with pressure gauges) and dry nitro-  
gen gas cylinder to this service port with charge hoses.  
Indoor unit  
CAUTION: Be sure to use a manifold  
valve for leak testing.  
The high side manifold valve must always  
be kept closed.  
Outdoor unit  
• Pressurize the system to no more than 150 P.S.I.G. with dry  
nitrogen gas and close the cylinder valve when the gauge  
reading reached 150 P.S.I.G. Next, test for leaks with liquid  
soap.  
CAUTION: To avoid nitrogen entering the  
refrigerant system in a liquid state, the top  
of the cylinder must be higher than its bottom  
when you pressurize the system. Usually, the  
cylinder is used in a vertical standing position.  
Manifold valve  
Pressure  
Lo  
Hi  
gauge  
Charge hose  
NOTICE  
:
Leakage test shoud be done for each indoor  
unit connection set, separately.  
Nitrogen gas  
cylinder(in vertical  
standing position)  
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Checking the Drainage, Forming the Pipings and Long Pipe Setting  
Evacuation  
1. Connect the charge hose end described in the preceding  
steps to the vacuum pump to evacuate the tubing and  
indoor unit.  
Confirm the "Lo" knob of the manifold valve is open. Then,  
run the vacuum pump.  
Indoor unit  
The operation time for evacuation varies with tubing length  
and capacity of the pump. The following table shows the  
time required for evacuation.  
Required time for evacuation when 30 gal/h vacuum  
pump is used  
Outdoor unit  
If tubing length is longer  
than 10m (33 ft)  
If tubing length is less  
than 10m (33 ft)  
10 min. or more  
15 min. or more  
2. When the desired vacuum is reached, close the "Lo" knob  
of the manifold valve and stop the vacuum pump.  
Finishing the job  
1. With a service valve wrench, turn the valve stem of liquid  
side valve counter-clockwise to fully open the valve.  
Manifold valve  
2. Turn the valve stem of gas side valve counter-clockwise to  
fully open the valve.  
Pressure  
gauge  
Lo  
Hi  
3. Loosen the charge hose connected to the gas side service  
port slightly to release the pressure, then remove the hose.  
4. Replace the flare nut and its bonnet on the gas side ser-  
vice port and fasten the flare nut securely with an  
adjustable wrench. This process is very important to pre-  
vent leakage from the system.  
Open  
Close  
5. Replace the valve caps at both gas and liquid side service  
valves and fasten them tight.  
This completes air purging with a vacuum pump.  
The air conditioner is now ready for test running.  
Vacuum pump  
NOTICE  
: Repeat evacuation procedure for each indoor  
unit.  
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Charging  
Charging  
■ Each outdoor unit is factory charged (nameplate charge) for the evaporator as well as a 7.5m(25ft) line set for each indoor  
line.  
Any time total line set is used either shorter or longer then the nominal 22.5m(75ft: for tri-zone) line set length the refrigerant  
charge has to be adjusted.  
■ Whether the line set is made shorter or longer you must adjust the charge based on how many ft of tubing are either added  
or removed based on 20g(0.22oz) of R-410A per meter(foot).  
Max Elevation  
Max total length Max length of  
Min length of  
each pipe  
(A/B/C)  
Max elevation  
between indoor  
units (h2)  
Additional  
Refrigerant  
between each indoor  
unit and outdoor unit  
(h1)  
Capacity (Btu/h)  
36k  
of all pipes  
(A+B+C)  
each pipe  
(A/B/C)  
45m(150ft)  
15m(50ft)  
3m(10ft)  
7.5m(25ft)  
7.5m(25ft)  
20g/m(0.22oz/ft)  
Example: A 80ft line set is used for tri - zone 5 additional ft X 0.22 ounces per foot= add 1.1 ounces of R-410A  
Important:  
If you are ever uncertain of the unit charge, reclaim, evacuate and weigh in the correct charge using the unit nameplate charge  
adjusting for line sets longer or shorter than 7.5m(25ft) for each indoor unit.  
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Test Running  
Test Running  
Split, Art Cool Type  
1. Check that all tubing and wiring have been properly con-  
Bolt  
nected.  
2. Check that the gas and liquid side service valves are  
fully open.  
1) Prepare remote controller  
Remove the battery cover by pulling it according to  
the arrow direction.  
Insert new batteries making sure that the (+) and (–)  
of battery are installed correctly.  
Reattach the cover by pushing it back into position.  
Tubing connection  
4) Evaluation of the performance  
Operate unit for 15~20 minutes, then check the system  
refrigerant charge:  
1. Measure the pressure of the gas side service valve.  
2. Measure the temperature of the intake and discharge of  
air.  
3. Ensure the difference between the intake temperature  
and the discharge is more than 8°C(46°F) (Cooling) or  
reversely (Heating).  
Outside ambient  
TEMP.  
The pressure of the gas side  
service valve.  
Refrigerant  
R-410A  
NOTE:  
• Use 2 AAA(1.5volt) batteries. Do not use rechargeable  
batteries.  
• Remove the batteries from the remote controller if the sys-  
tem is not going to be used for a long time.  
35°C (95°F) 8.5~9.5kg/cm2G(120~135 P.S.I.G.)  
2) Precautions in test run  
Intake temperature  
■ The initial power supply must provide at least 90% of  
the rated voltage.  
Otherwise, the air conditioner should not be operated.  
Discharge air  
■ For test run, carry out the cooling operation firstly  
even during heating season. If heating operation is  
carried out firstly, it leads to the trouble of compres-  
sor. Then attention must be paid.  
■ Carry out the test run more than 5 minutes without  
fail. (Test run will be cancelled 18 minutes later auto-  
matically)  
Discharge  
temperature  
Intake temperature  
■ The test run is started by pressing timer cancel button  
five times continuously. (Room type)  
Discharge air  
■ To cancel the test run, press any button.  
3) Settlement of outdoor unit  
■ Anchor the outdoor unit with a bolt and nut(ø10mm)  
tightly and horizontally on a concrete or rigid mount.  
■ When installing on the wall, roof or rooftop, anchor the  
mounting base securely with a nail or wire assuming the  
influence of wind and earthquake.  
■ In the case when the vibration of the unit is conveyed to  
the hose, secure the unit with an anti-vibration rubber.  
Discharge  
temperature  
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Operation  
Operation  
Function of control  
1. MAIN UNIT FUNCTION  
• DISPLAY  
Operation Indicator  
• On while in appliance operation, off while in appliance pause  
• Flashing while in disconnection or short in Thermistor (3 sec off / 0.5 sec on)  
Sleep Timer Indicator  
• On while in sleep timer mode, off when sleep timer cancel or appliance operation pause  
Timer Indicator  
• On while in timer mode (on/off), off when timer mode is completed or canceled  
Defrost Indicator  
• Off except when hot start during heating mode operation or while in defrost control  
■ Cooling Mode Operation  
• When the intake air temperature reaches 0.5°C(32.9°F) below the setting temp, the compressor and the outdoor  
fan stop.  
• When it reaches 0.5°C(32.9°F) above the setting temp, they start to operate again.  
Compressor ON Temp  
Compressor OFF Temp  
■■Setting Temp+0.5°C(32.9°F)  
■ Setting Temp-0.5°C(31.1°F)  
• While in compressor running, operating with the airflow speed set by the remote control. While compressor is  
off fan operates at low speed regardless of the setting.  
■ Soft Dry Operation Mode  
• When the dehumidification operation input by the remote control is received, the intake air temperature is  
detected and the setting temp is automatically set according to the intake air temperature.  
26°C(78.8°F) ≤ Intake Air Temp  
■■ 25°C(77°F)  
24°C(75.2°F) ≤ Intake Intake Air Temp<26°C(78.8°F)  
18°C(64.4°F) ≤ Intake Intake Air Temp<24°C(75.2°F)  
Intake Air Temp<18°C(64.4°F)  
■■ Intake Air Temp-1°C(30.2°F)  
■■ Intake Air Temp-0.5°C(31.1°F)  
■■ 18°C(64.4°F)  
• While compressor off, the indoor fan repeats low airflow speed and stop.  
• While the intake air temp is between compressor on temp. and compressor off temp., 10-min dehumidification  
operation and 4-min compressor off repeat.  
Compressor ON Temp.  
■ Setting Temp+0.5°C(32.9°F)  
Compressor OFF Temp. ■ Setting Temp-0.5°C(31.1°F)  
• In 10-min dehumidification operation, the indoor fan operates with the low airflow speed.  
■ Heating Mode Operation  
• When the intake air temp reaches +3°(37.4°F)…above the setting temp, the compressor is turned off. When  
below the setting temp, the compressor is turned on.  
Compressor ON Temp.  
■ Setting Temp.  
Compressor OFF Temp. ■ Setting Temp.+3°C(37.4°F)  
• While compressor on, the indoor fan is off when the indoor pipe temp. is below 20°C(68°F), when above  
27°C(80.6°F) , it operates with the low or setting speed. When the indoor pipe temp is between 20°C(68°F) and  
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Operation  
27°C(80.6°F), it operates with Super-Low(while in sleep mode, with the medium airflow speed).  
• While compressor off, the indoor fan is off when the indoor pipe temp is below 33°C(91.4°F), when above  
35°C(95°F) , it operates with the low airflow speed.  
• While in defrost control, the indoor is outdoor fans are turned off.  
■ Defrost Control(Heating)  
• Defrost operation is controlled by timer and sensing temperature of outdoor pipe.  
• The first defrost starts only when the outdoor pipe temperature falls below -6°C(21.2°F) after 35 minutes  
passed from starting of heating operation and more than 4 minutes operation of compressor.  
• Defrost ends after 12 minutes passed from starting of defrost operation when the outdoor pipe temperature  
rises over 15°C(59°F) even before 12 minutes.  
• The second defrost starts only when the outdoor pipe temperature falls below -6°C(21.2°F) after 35 minutes  
passed from ending of the first defrost and more than 4 minutes operation of compressor.  
■ Fuzzy Operation  
• When any of operation mode is not selected like the moment of the power on or when 3 hrs has passed since  
the operation off, the operation mode is selected.  
• When determining the operation mode, the compressor, the outdoor fan, and the 4 way valve are off and only  
the indoor fan is operated for 15 seconds. Then an operation mode is selected according to the intake air  
temp at that moment as follows.  
24°C(75.2°F) ≤ Inatake Air Temp  
21°C(69.8°F) ≤ Inatake Air Temp<24°C(75.2°F)  
Inatake Air Temp<21°C(69.8°F)  
■ Fuzzy Operation for Cooling  
■ Fuzzy Operation for Dehumidification  
■ Fuzzy Operation for Heating  
• If any of the operation modes among cooling / dehumidification / heating mode operations is carried out for 10  
sec or longer before Fuzzy operation, the mode before Fuzzy operation is operated.  
1) Fuzzy Operation for Cooling  
• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5°C(32.9°F) or more  
below the setting temp, the compressor is turned off. When 0.5°C(32.9°F) or more above the setting temp, the  
compressor is turned on.  
Compressor ON Temp  
Compressor OFF Temp  
■ Setting Temp +0.5°C(32.9°F)  
■ Setting Temp + 0.5°C(32.9°F)  
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the  
intake air temp at that time.  
26°C(78.8°F)≤ Intake Air Temp  
■ 25°C(77°F)  
24°C(75.2°F)≤ Intake Air Temp<26°C(78.8°F)  
22°C(71.6°F)≤ Intake Air Temp<24°C(75.2°F)  
18°C(64.4°F)≤ Intake Air Temp<22°C(71.6°F)  
Intake Air Temp<18°C(64.4°F)  
■ Intake Air Temp + 1°C(33.8°F)  
■ Intake Air Temp + 0.5°C(32.9°F)  
■ Intake Air Temp  
■ 18°C(64.4°F)  
• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the  
Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature  
automatically according to the Fuzzy rule.  
• While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the temper-  
ature.  
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Operation  
2) Fuzzy Operation for Dehumidification  
• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5°C(32.9°F) or more  
below the setting temp, the compressor is turned off. When 0.5°C(32.9°F) or more above the setting temp, the  
compressor is turned on.  
Compressor ON Temp  
Compressor OFF Temp  
■ Setting Temp + 0.5°C(32.9°F)  
■ Setting Temp+0.5°C(32.9°F)  
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the  
intake air temp at that time.  
26°C(78.8°F) ≤ Intake Air Temp  
■ 25°C(77°F)  
24°C(75.2°F) ≤ Intake Air Temp<26°C(78.8°F)  
22°C(71.6°F) ≤ Intake Air Temp<24°C(75.2°F)  
18°C(64.4°F) ≤ Intake Air Temp<22°C(71.6°F)  
Intake Air Temp<18°C(64.4°F)  
■ Intake Air Temp+1°C(33.8°F)  
■■ Intake Air Temp+0.5°C(32.9°F)  
■ Intake Air Temp  
■ 18°C(64.4°F)  
• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the  
Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature  
automatically according to the Fuzzy rule.  
• While in Fuzzy operation, the airflow speed of the indoor fan repeats the low airflow speed or pause as in  
dehumidification operation.  
3) Fuzzy Operation for Heating  
• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 3°C(37.4°F) or more  
above the setting temp, the compressor is turned off. When below the setting temp, the compressor is turned  
on.  
Compressor ON Temp  
Compressor OFF Temp  
■ Setting Temp  
■ Setting Temp + 3°C(37.4°F)  
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the  
intake air temp at that time.  
20°C(68°F)≤Intake Air Temp  
Intake Air Temp<20°C(68°F)  
■ Intake Air Temp + 0.5°C(32.9°F)  
■ 20°C(68°F)  
• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the  
Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature  
automatically according to the Fuzzy rule.  
• While in Fuzzy operation, the airflow speed of the indoor fan is set to the high or the medium according to the  
intake air temperature and the setting temperature.  
■■Airflow Speed Selection  
• The airflow speed of the indoor fan is set to high, medium, low, or power (auto) by the input of the airflow  
speed selection key on the remote control.  
■ On-Timer Operation  
• When the set time is reached after the time is input by the remote control, the appliance starts to operate.  
• The timer LED is on when the on-timer is input. It is off when the time set by the timer is reached.  
• If the appliance is operating at the time set by the timer, the operation continues.  
While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the temperature.  
■■Off-Timer Operation  
• When the set time is reached after the time is input by the remote control, the appliance stops operating.  
• The timer LED is on when the off-timer is input. It is off when the time set by the timer is reached.  
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Operation  
• If the appliance is on pause at the time set by the timer, the pause continues.  
■■Off-Timer <=> On-Timer Operation  
• When the set time is reached after the on/off time is input by the remote control, the on/off-timer operation is  
carried out according to the set time.  
■■Sleep Timer Operation  
• When the sleep time is reached after <1,2,3,4,5,6,7,0(cancel) hr> is input by the remote control while in appli-  
ance operation, the operation of the appliance stops.  
• While the appliance is on pause, the sleep timer mode cannot be input.  
• While in cooling mode operation, 30 min later since the start of the sleep timer, the setting temperature  
increases by 1°C(33.8°F). After another 30 min elapse, it increases by 1°C(33.8°F) again.  
• When the sleep timer mode is input while in cooling cycle mode, the airflow speed of the indoor fan is set to  
the low.  
• When the sleep timer mode is input while in heating cycle mode, the airflow speed of the indoor fan is set to  
the medium.  
■■Chaos Swing Mode  
• By the Chaos Swing key input, the upper/lower vane automatically operates with the Chaos Swing or they are  
fixed to the desired direction.  
• While in Chaos Swing mode, the angles of cooling and heating cycle operations are different.  
■■Chaos Natural Wind Mode  
• When the Chaos Natural Wind mode is selected and then operated, the high, medium, or low speed of the air-  
flow mode is operated for 2~15 sec. randomly by the Chaos Simulation.  
■■Jet Cool Mode Operation  
• While in heating mode or Fuzzy operation, the Jet Cool key cannot be input. When it is input while in the  
other mode operation (cooling, dehumidification, ventilation), the Jet Cool mode is operated.  
• In the Jet Cool mode, the indoor fan is operated at super-high speed for 30 min at cooling mode operation.  
• In the Jet Cool mode operation, the room temperature is controlled to the setting temperature, 18°C(64.4°F)  
.
• When the sleep timer mode is input while in the Jet Cool mode operation, the Jet Cool mode has the priority.  
• When the Jet Cool key is input, the upper/lower vanes are reset to those of the initial cooling mode and then  
operated in order that the air outflow could reach further.  
■■Auto Restarting Operation  
• When the power is restored after a sudden power failure while in appliance operation, the mode before the  
power failure is kept on the memory and the appliance automatically operates in the mode on the memory.  
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Operation  
■ Forced Operation  
• To operate the appliance by force in case that the remote control is lost, the forced operation selection switch  
is on the main unit of the appliance to operate the appliance in the standard conditions.  
• When the power is supplied while the slide switch is on the forced operation position, or when the slide switch  
position is switched to the Auto Restarting (or test operation) position or switched from the remote control  
position to the forced operation position while the power is on, the forced operation is carried out.  
• When the slide switch position is switched from the forced operation position to the Auto Restarting position or  
the remote control position, the forced operation is canceled and the appliance stops operating.  
• In the forced operation mode, the indoor fan is operated at low speed for around 15 sec and then the opera-  
tion condition is set according to the intake air temperature as follows.  
24°C(75.2°F)≤Intake Air Temp  
21°C(69.8°F)≤Intake Air Temp<24°C(75.2°F)  
Intake Air Temp<21°C(69.8°F)  
■ Cooling Mode Operation, 22°C(71.6°F), High Speed  
■ Dehumidification Operation, 23°C(73.4°F), High Speed  
■ Heating Mode Operation, 24°C(75.2°F), High Speed  
■ Buzzer Sounding Operation  
• When the appliance-operation key is input by the remote control, the short "beep-beep-" sounds.  
• When the appliance-pause key is input by the remote control, the long "beep—" sounds.  
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Operation  
Function of Indoor Unit  
Split Type Indoor Unit  
Operation ON/OFF by Remote controlle  
r
Sensing the Room Temperature  
• Room temperature sensor. (THERMISTOR)  
Room temperature control  
• Maintains the room temperature in accordance with the Setting Temp.  
Starting Current Control  
• Indoor fan is delayed for 5 seconds at the starting.  
Time Delay Safety Control  
• Restarting is delayed for approx. 3 minutes.  
Indoor Fan Speed Control  
• High, Med, Low, Chaos, Jet Cool  
Operation indication Lamps (LED)  
On/Off  
Sleep Mode : Lights up during Sleep Mode Auto operation.  
Timer : Lights up during Timer operation.  
Defrost Mode: Lights up during Defrost Mode or Hot Start operation (Heat pump model only)  
: Lights up during the system operation.  
Outdoor unit  
operation  
: Lights up during outdoor unit operation.(Cooling model only)  
Desire temperature For cooling,dehumidification,heating modes it display Destired temperature  
indicator  
• Cooling  
• Dehumidification : 18°C~30°C(64°F~86°F)  
• Heating : 16~30°C(60°F~86°F)  
: 18°C~30°C(64°F~86°F)  
• AI : Auto Operation  
• Po : Jet Cool  
• Lo : Test Mode  
: The function illustrates its dynamic mode by using a multiple lighting system. (Optional)  
Plasma  
Soft Dry Operation Mode  
• Intermittent operation of fan at low speed.  
Sleep Mode Auto Control  
Deice (defrost) control (Heating)  
• Both the indoor and outdoor fan  
stops during deicing.  
• Hot start after deice ends.  
• The fan is switched to low(Cooling), med(Heating) speed.  
• The unit will be stopped after 1, 2, 3, 4, 5, 6, 7 hours.  
Natural Air Control by CHAOS Logic  
Hot-start Control (Heating)  
• The fan is switched to intermittent or irregular operation  
• The indoor fan stops until the  
evaporator piping temperature will  
be reached at 27°C(80.6°F).  
•
The fan speed is automatically switched from high to low speed.  
* Airflow Direction Control  
• The louver can be set at the desired position or swing  
up and down automatically.(Model base)  
"Wall Mounted Type is standard"  
* Functions is dependent on model type.  
Service Manual 45  
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Operation  
Art Cool Type Indoor Unit  
Operation ON/OFF by Remote controller  
Sensing the Room Temperature  
• Room temperature sensor. (THERMISTOR)  
Room temperature control  
• Maintains the room temperature in accordance with the Setting Temp.  
Starting Current Control  
• Indoor fan is delayed for 5 sec at the starting.  
Time Delay Safety Control  
• Restarting is inhibited for approx. 3 minutes.  
Indoor Fan Speed Control  
• High, Med, Low, CHAOS, JET COOL  
Operation indication Lamps (LED)  
On/Off  
: Lights up during the system operation.  
: Lights up during Sleep Mode Auto operation.  
: Lights up during Timer operation.  
Sleep Mode  
Timer  
Defrost Mode  
: Lights up during Defrost Mode or  
Hot Start operation.(Heat pump model only)  
Outdoor unit  
operation  
: Lights up during outdoor unit operation.(Cooling model only)  
Desire temperature For cooling,dehumidification,heating modes it display Destired temperature  
indicator  
• Cooling  
• Dehumidification : 18°C~30°C(64°F~86°F)  
• Heating : 16~30°C(60°F~86°F)  
: 18°C~30°C(64°F~86°F)  
• AI : Auto Operation  
• Po : Jet Cool  
• Lo : Test Mode  
PLASMA  
: Indicate PLASMA purifier operation.  
Soft Dry Operation Mode  
PLASMA  
• Intermittent operation of fan at low speed.  
• The function will be operated while in any  
operation mode with selecting the function.  
• The function is to be stopped while it is  
operating with selecting the function.  
Sleep Mode Auto Control  
• The fan is switched to low(Cooling), med(Heating) speed.  
• The unit will be stopped after 1, 2, 3, 4, 5, 6, 7 hours.  
Defrost(Deice) control (Heating)  
Natural Air Control by CHAOS Logic  
• Both the indoor and outdoor fan stops dur-  
• The fan is switched to intermittent or irregular operatio  
n
ing defrosting.  
•
The fan speed is automatically switched from high to low speed.  
Hot-start Control (Heating)  
Airflow Direction Control  
• The indoor fan stops until the  
evaporator pipe temperature will be reached  
at 28°C(82.4°F).  
• The louver can be set at the desired position or swing  
up and down automatically.  
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Operation  
Function of Outdoor Unit  
Outdoor Unit  
Two Comp algorithm  
• Inverter Comp is first priority and then Constant Comp is turning on responding to load condtion.  
Operating Step  
• Compressor step varies considering condition such as room temp,outdoor temp, operating room  
number,Temp gap between room temp and set temp and so on.  
LEV Control  
• LEV pulse is modulated to keep constant superheat or subcooling.  
Out door Fan Control  
• Outdoor fan operates at High or Off to respond to the load condition.  
R/Valve Control(Heating Model Only)  
• Convert R/Valve to change cooling to heating, heating to cooling.  
Defrost Function  
• After 45 min heating operation, check the defrost condition and if outdoor pipe temp is below -  
5°C(23°F) and released from deice operation in case outdoor pipe temp is over 12°C(53.6°F) or 9 min  
cooing mode.  
• To deice outdoor heat exchanger in low temp condtion, convert operating mode from heating to  
Oil Return System  
• In single(one) comp operation duration, another comp will operate for 30 seconds every 1 hours.  
Comp Overload Protection  
• To protect comp from being overload, protector will turn off the comp.  
High Pressure Protction  
• If cycle pressure is too high(around 36.7 kgf/cm2), it will turn off comp A  
Service Manual 47  
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Operation  
Remote Control Operation  
The Remote Controller transmits the signals to the system.  
START/STOP BUTTON  
Operation starts when this button is pressed and stops when  
the button is pressed again.  
1
Signal transmitter  
OPERATION MODE SELECTION BUTTON  
Used to select the operation mode.  
2
3
(Cooling Only)  
(Heat Pump)  
ROOM TEMPERATURE  
SETTING BUTTONS  
Used to select the room temperature.  
INDOOR FAN SPEED SELECTOR  
Used to select fan speed in four steps  
low, medium, high and CHAOS.  
4
5
6
5
6
1
3
JET COOL  
Used to start or stop the speed cooling/heating.  
(Speed cooling/heating operates super high fan speed.)  
4
CHAOS SWING BUTTON  
Used to stop or start louver movement and set the desired  
up/down airflow direction.  
10  
2
7
CANCEL  
9
SET  
ON  
OFF  
AUTO CLEAN  
16  
11  
8
13  
ON/OFF TIMER BUTTONS  
Used to set the time of starting and stopping operation.  
7
8
9
12  
17  
18  
15  
°C/°F  
TIME SETTING BUTTONS  
Used to adjust the time.  
14  
TIMER SET/CANCEL BUTTON  
Used to set the timer when the desired time is obtained and to cancel  
the Timer operation.  
SLEEP MODE AUTO BUTTON  
Used to set Sleep Mode Auto operation.  
10  
11  
12  
13  
14  
15  
Flip-up door  
(opened)  
AIR CIRCULATION BUTTON  
Used to circulate the room air without cooling or heating.  
Operation Mode  
ROOM TEMPERATURE CHECKING BUTTON  
Used to check the room temperature.  
Cooling Operation  
PLASMA(OPTIONAL)  
Used to start or stop the plasma-purification function.  
Auto Operation  
RESET BUTTON  
Initialize remote controller.  
Healthy Dehumidification Operation  
2nd F Button  
Heating Operation  
Used prior to using modes printed in blue at the bottom of buttons.  
AUTO CLEAN  
Used to set Auto Clean mode.  
•
Cooling Model( ), Heat Pump Model(  
)
16  
17  
˚C TO ˚F SWITCHING BUTTON  
Used to switch temperature reading from Centigrade to Fahrenheit.  
HORIZONTAL AIRFLOW DIRECTION CONTROL BUTTON (NOT ON  
ALL MODELS)  
18  
Used to set the desired horizontal airflow direction.  
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Disassembly  
Disassembly  
Indoor Unit  
Split Type Indoor Unit  
Disconnect the unit from power supply before mak-  
ing any checks.  
Be sure the power switch is set to “OFF”.  
To remove the Grille from the Chassis.  
• Set the up-and-down air discharge louver to open  
position (horizontally) by finger pressure.  
• Remove the securing screws.  
• To remove the Grille, pull the lower left and right  
side of the grille toward you (slightly tilted) and lift it  
straight upward.  
1. Before removing the control box, be sure to  
take out the wire screwed at the other end.  
Earth  
Conductor  
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Disassembly  
2. To remove the Control Box.  
• Remove securing screws.  
• Pull the control box out from the chassis  
carefully.  
Screw  
3. To remove the Discharge Grille.  
• Unhook the discharge grille and pull the  
discharge grille out from the chassis carefully.  
4. To remove the Evaporator.  
• Remove 3 screws securing the evaporator(at the  
left 2EA in the Eva Holder, at the right 1EA).  
• When repair, do not damage the Caution label.  
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Disassembly  
• Unhook the tab on the right inside of the chassis  
at the same time, slightly pull the evaporator  
toward you until the tab is clear of the slot.  
5. To remove the Motor Cover  
• Remove 2 securing screw.  
• Pull the motor cover out from the chassis  
carefully.  
Motor cover  
6. To remove the Cross-Flow Fan  
• Loosen the screw securing the cross-flow fan to  
the fan motor (do not remove).  
Bearing  
• Lift up the right side of the cross-flow fan and the  
fan motor, separate the fan motor from the  
cross-flow fan.  
Cross-flow fan  
• Remove the left end of the cross-flow fan from  
the self-aligning bearing.  
Service Manual 51  
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Disassembly  
Art Cool Type Indoor Unit  
CAUTION: Disconnect the unit from  
power supply before making any  
checks.  
Be sure the power switch is set to  
“OFF”.  
1. To remove the Grille from the Chassis.  
- Pull the grille bottom, the remove 2 securing screws.  
- Lift the both lower parts of panel front.  
- After pull down this panel a bit, separate connecting  
wire with product.  
Panel Front  
Connector  
Step Motor Connectors  
2. To remove the Control Box.  
- Before removing the control box, be sure to  
disconnect the wires from PWB.  
Sensor Connector  
- Pull the cover control out from the control box  
and disconnect other wires.  
- Remove securing screws.  
- Pull the control box out from the chassis carefully.  
4Way/Fan Connector  
Motor  
Comp Connector  
Power Connector  
Power Connector  
Comp Connector  
Connector  
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Disassembly  
3) To remove the Evaporator.  
- Remove 4 screws securing the evaporator.  
- Pull the evaporator out from the chassis carefully.  
4) Before removing the Turbo Fan.  
- Remove the securing screws from the chassis.  
- Pull the pipe cover, top cover and the air guide.  
Air Guide  
Top Cover  
Pipe Cover  
5) To remove the Motor.  
Bracket  
- Remove the securing bolt from the motor shaft.  
- Pull the fan out from the motor shaft.  
- Remove 4 screws securing motor mount from the  
chassis and lift up the motor mount and the brack-  
et.  
Turbo Fan  
Bolt  
Motor Mount  
Service Manual 53  
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Schematic Diagram  
Schematic Diagram  
Electronic Control Device  
1. Indoor Unit  
1) Split Type  
54 Multi type Air Conditioner  
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Schematic Diagram  
2) Art Cool Type  
R D  
R D  
O R  
O R  
B L P K Y L  
B L P K Y L  
FG  
5V  
AVdd1  
AVss  
R D  
R D  
O R Y L P K B L  
O R Y L P K B L  
Service Manual 55  
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Schematic Diagram  
2. Outdoor Unit  
56 Multi type Air Conditioner  
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Schematic Diagram  
Service Manual 57  
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Schematic Diagram  
Wiring Diagram  
1. Room Type Indoor Unit -S4/SE chassis  
2. Art Cool Type Indoor Unit  
3. Outdoor Unit  
1. A3UH363FA0(LMU360HE)  
2. A3UC363FA0(LMU360CE)  
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Schematic Diagram  
Components Locations  
1. Indoor Unit  
MAIN P.C.B ASM  
1) Split Type  
• TOP VIEW  
PCB :6870A90409B  
ASSY:6871A20771  
6871A20782  
• BOTTOM VIEW  
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Schematic Diagram  
2) Art Cool Type  
• TOP VIEW  
• BOTTOM VIEW  
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Schematic Diagram  
2. Display ASSEMBLY  
1) Split Type (6871A20680)  
2) Art Cool Type (6871A20462)  
TOP VIEW  
BOTTOM VIEW  
Service Manual 61  
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Schematic Diagram  
3. Outdoor Unit  
1) Component side  
62 Multi type Air Conditioner  
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Schematic Diagram  
2) Solder side  
Service Manual 63  
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Troubleshooting Guide  
Troubleshooting Guide  
Refrigeration Cycle Diagram  
1. A3UH363FA0(LMU360HE)  
OUTDOOR UNIT  
Ø9.52  
Room C  
High pressure S/W  
Ø9.52  
Field Piping  
Gas  
Room B  
Ø9.52  
Room A  
Header  
Th3  
Th1  
Th2  
Heat  
Exchanger  
LEV-C  
LEV-B  
Ø6.35  
Room C  
Ø6.35  
Room B  
Ø6.35  
Room A  
Field Piping  
Liquid  
LEV-A  
Refrigerant Flow  
Cooling  
Th1: Discharge thermistor  
Th2: Discharge thermistor  
Th3: Outdoor temperature thermistor  
2. A3UC363FA0(LMU360CE)  
OUTDOOR UNIT  
Ø9.52  
Room C  
Ø9.52  
Field Piping  
Room B  
Gas  
Ø9.52  
Room A  
High pressure S/W  
Header  
Th3  
Th1  
Th2  
Heat  
Exchanger  
LEV-C  
Ø6.35  
Room C  
LEV-B  
LEV-A  
Ø6.35  
Field Piping  
Room B  
Liquid  
Ø6.35  
Room A  
Th4  
Refrigerant Flow  
Cooling  
Heating  
Th1: Discharge thermistor  
Th2: Discharge thermistor  
Th3: Outdoor temperature thermistor  
Th4: Defrost thermistor  
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Troubleshooting Guide  
Self-diagnosis Function  
■ Error Indicator  
• The function is to self-diagnoisis airconditioner and express the troubles identifically if there is any trouble.  
• Error mark is ON/OFF for the operation LED of evaporator body in the same manner as the following table.  
• If more than two troubles occur simultaneously, primarily the highest trouble fo error code is expressed.  
• After error occurrence, if error is released, error LED is also released simultaneously.  
• To operate again on the occurrence of error code, be sure to turn off the power and then turn on.  
• Having or not of error code is different from Model.  
LED1 LED2  
Indoor Error  
Error code  
Description  
MPS Variable  
LED1  
LED2  
Indoor Status  
00  
01  
02  
05  
06  
07  
10  
No Error  
ON  
Indoor Room Thermistor Error  
Indoor In-Piping Error  
1 time  
2 times  
5 times  
6 times  
7 times  
OFF  
OFF  
OFF  
OFF  
OFF  
OFF  
Communication Error between In and Out  
Indoor Out-Piping Error  
Differnt mode operation  
Indoor fan motor locked error  
1 times  
Outdoor Error  
Error code  
Description  
MPS Variable  
LED1(Red)  
LED2(Green) Indoor Status  
33  
44  
45  
47  
51  
D-Pipe High(Normal)  
3 times  
4 times  
4 times  
4 times  
5 times  
3 times  
4 times  
5 times  
7 times  
1 times  
OFF  
OFF  
OFF  
OFF  
OFF  
Outdoor Air Thermistor Error(Open/Short)  
Cond Pipe Thermistor Error(Open/Short)  
Const. D-Pipe Thermistor Error(Open/Short)  
Capcity Error(High/Low)  
Service Manual 65  
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Troubleshooting Guide  
Cycle Troubleshooting Guide  
Trouble analysis  
1. Check temperature difference between intake and discharge air, and operating current.  
Temp. difference  
Current  
: approx. 0°C(32°F)  
: less than 80% of  
rated current  
All amount of refrigerant leaked out.  
Check refrigeration cycle.  
Temp. Difference  
Operating Current  
Temp. difference  
Current  
: approx. 8°C(46.4°F)  
: less than 80% of  
rated current  
Refrigerant leakage  
Clog of refrigeration cycle  
Defective compressor  
Temp. difference  
Current  
: less than 8°C(46.4°F)  
: near the rated cur-  
rent  
Excessive amount of refrigerant  
Temp. difference : over 8°C(46.4°F)  
Normal  
Notice:  
Temperature difference between intake and discharge air depends on room air humidity. When the room air  
humidity is relatively higher, temperature difference is smaller. When the room air humidity is relatively lower  
temperature difference is larger.  
2. Check temperature and pressure of refrigeration cycle.  
Suction pressure  
(Compared with  
the normal value)  
Temperature  
(Compared with  
the normal value)  
Cause of Trouble  
Description  
High  
Defective compressor  
Current is low.  
Higher  
Lower  
Normal  
Excessive amount of  
refrigerant  
High pressure does not quickly  
rise at the beginning of operation.  
Insufficient amount of  
refrigerant(Leakage)  
Clogging  
Current is low.  
Higher  
Notice:  
2
1. The suction pressure is usually 4.5~6.0 kg/cm G at normal condition.  
2. The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with  
putty.  
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Troubleshooting Guide  
Electronic Parts Troubleshooting Guide  
■ Refer to electronic contorol device drawing & schematic diagram.  
The Product doesn’t operate at all.  
Trouble 1  
Turn off the main power and wait until LED on outdoor PCB is off.  
Turn on the main power again.  
Does "Beeping" sound is made from the indoor unit?  
NO  
YES  
• Primarily, the operating condi-  
tion of Micom is O.K.  
Check the voltage of power(AC208V/AC230V, 60Hz).  
• The voltage of main power.  
• The voltage applied to the unit.  
• The connecting method of Indoor/Outdoor connecting cable (each color)  
• The P.W.B. Ass'y  
(Fuse, Noise Filter, Power Transformer, IC01D, IC02D, etc.)  
• Check CN-DISP1  
The operation check of the P.C.B. Ass'y  
Specification  
1) AC230V ± 30V  
Remedy  
Procedure  
1) Replace  
1) The input voltage of power trans-  
former.  
: Check the rated voltage  
power transfomer.  
2) 15V ± 1.5V  
2) Replace  
2) The output voltage of power  
transformer.  
power transfomer.  
3) DC12V  
4) DC5V  
3) Replace IC01D.  
4) Replace IC02D.  
5) Replace IC01A.  
3) IC01D(7812)  
4) IC02D(7805)  
5) IC01A(KIA7036)  
5) The voltage of micom pin 29  
: DC4.5V↑  
Service Manual 67  
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Troubleshooting Guide  
Product doesn't operate with the remote controller.  
Trouble 2  
Turn on main power.  
While the compressor has been stopped, the compressor does not operate  
owing to the delaying function for 3 minutes after stopped.  
When the compressor stopped Indoor Fan is driven by a low speed.  
At this point the wind speed is not controlled by the remote controller.  
(When operated in the Sleeping Mode, the wind speed is set to the low speed as force.)  
Caused by other parts except  
Caused by the remote controller.  
the remote controller  
When the mark (  
) is displayed in LCD  
Check the contact of CN-DISP 1 connector  
screen, replace battery.  
When the detect switch (double key) inside the  
remote controller door is fault, it is impossible to  
operate temperature regulating(■ / ■) and wind  
speed selecting.  
Check DISP PWB Ass'y  
-Voltage between CN1 ■■- ■■: DC +5V  
Check the Display PWB Ass'y  
• Check receiver ass'y  
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Troubleshooting Guide  
The Compressor/Outdoor Fan are don't operate  
Trouble 3  
Turn on the main power.  
Operate Cooling Mode by setting the disired temperature of the remote controller is less  
than one of the Indoor temperature by 1°C at least.  
When in air circulation mode, compressor/outdoor fan is stopped.  
Check the sensor for Indoor temperature is attatched as close as to be effected by the  
themperature of Heat Exchange (EVA.)  
When the sensor circuit for Indoor temperature and connector are in bad connection or are  
not engaged, Compressor/Outdoor fan is stopped.  
• Check the related circuit of R01H(1K), R02H(1K), R03H(1K), R04H(1K), Micom(pin No. 74 ,  
75 , 76 , 77 ).  
• Check the Indoor temperature sensor is disconnected or not (about 10K at 25°C).  
Check the Relay(RY-PWR, RY-START) for driving Compressor.  
• Check the voltage between brown and blue cable of terminal to connect the Outdoor  
(About AC208V / 230V).  
• Check the related circuit of relay in Outdoor PCB Ass'y.  
Check Point  
Comp. ON  
DC 5V  
Comp. OFF  
DC 0V  
Between Micom(No. 50,51) and  
GND  
Between IC01M(No. 10) and  
GND  
DC 1V↓  
DC 12V  
Turn off main power.  
Check the electrical wiring diagram of Outdoor side.  
Check the open or short of connecting wires between Indoor and Outdoor.  
Service Manual 69  
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Troubleshooting Guide  
When indoor Fan does not operate.  
Trouble 4  
When indoor Fan does not operate.  
Does the voltage of each terminals of CN-MOTOR CONNECTOR in  
Indoor unit corresponds to values in the Table of page 69  
Does the voltage of terminal of CN-DC/DC CONNECTOR in  
Check connecting condition of the CN-MOTOR CON-  
Indoor unit corresponds to the values in the table of page 56  
NECTOR  
Do the voltage of terminal of  
Check the pattern and the  
CN-DC/DC CONNECTOR in  
condition of Indoor unit PWB  
Outdoor unit corresponds to the  
Ass'y.  
Check the interference of Indoor Fan.  
values in the table of page 56  
NO  
Check the connecting condi-  
Check the patterns and the  
tion and disconnection of  
Check the motor of Indoor Fan  
conditions of outdoor unit  
connecting wires between  
PWB Assy's.  
Indoor and Outdoor unit.  
Indoor Fan may be stopped in the Soft Dry Mode(change to the Cooling Operation Mode).  
Indoor Fan is to be stopped when Indoor pipe(coil) termperature is lower than 79°F.  
(At that times, Defrost indicator is turned on)  
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Troubleshooting Guide  
When the louver does not operate.  
When Vertical Louver does not operate.  
Trouble 5  
• Confirm that the Vertical Louver is normally geared with the shaft of  
Stepping Motor.  
• If the regular torque is detected when rotating the Vertical Louver with  
hands  
Normal  
• Check the connecting condition of CN-UP/DOWN Connector  
• Check the soldering condition(on PWB) of CN-UP/DOWN Connector  
Check the operating circuit of the Vertical Louver  
+
• Confirm that there is DC 12V between pin (RED) of CN-UP/DOWN and  
GND.  
• Confirm that there is a soldering short at following terminals.  
- Between 60 , 61 , 62 and 63 of MICOM  
- Between 2 , 3 , 4 and 5 of IC01M  
- Between 12 , 13 , 14 , 15 of IC01M  
- Between 1 , 2 , 3 , 4 and 5 of CN-UP/DOWN  
If there are no problems after above checks  
• Confirm the assembly conditions that are catching and interfering parts in  
the rotation radial of the Vertical Louver  
Service Manual 71  
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Troubleshooting Guide  
Error Code  
■ Trouble Shooting  
Error  
code  
Title  
Cause of error  
• Open / Short  
• Soldered poorly  
• Internal circuit error  
Check point & Normal condition  
Normal resistor : 10KΩ / at 25°C (Unplugged)  
Normal voltage : 2.5Vdc / at 25°C (plugged)  
01  
02  
06  
Indoor air sensor  
• Open / Short  
• Soldered poorly  
• Internal circuit error  
Normal resistor : 5KΩ/ at 25°C (Unplugged)  
Normal voltage : 2.5Vdc / at 25°C (plugged)  
Indoor inlet pipe sensor  
Indoor outlet pipe sensor  
• Open / Short  
• Soldered poorly  
• Internal circuit error  
Normal resistor : 5KΩ/ at 25°C (Unplugged)  
Normal voltage : 2.5Vdc / at 25°C (plugged)  
10KΩ  
2.5Vdc  
Ω
V
Check the resistance / voltage  
■ Check Point  
1. Unplug the sensor on Indoor unit PCB.  
2. Estimate the resistance of each sensor  
3. If the resistance of the sensor is 10KΩ/5KΩ at 25°C, then sensor is normal  
4. If the resistance of the sensor is 0 KΩ or ∞, then sensor is abnormal. ■ Change the sensor.  
5. Plug the sensor on Indoor unit PCB and Power ON.  
6. Estimate the voltage of each sensor.  
7. If the voltage of the sensor is 2.5Vdc / at 25°C, then sensor is normal.  
8. If the resistance of the sensor is 0 or 5Vdc, then sensor is abnormal. ■ Repair or Change the PCB  
72 Multi type Air Conditioner  
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Troubleshooting Guide  
Error  
code  
Title  
Cause of error  
Check point & Normal condition  
• Power input AC 230V.(Outdoor, Indoor)  
• The connector for transmission is disconnected.  
• The connecting wires are misconnected.  
• The GND 1,2 is not connected at main GND.  
• The communication line is shorted at GND.  
• Transmission circuit of outdoor PCB is abnormal.  
• Transmission circuit of indoor PCB is abnormal.  
Communication  
(Indoor ■ Outdoor)  
05 / 53  
• Communication poorly  
■ Check Point  
1. Check the input power AC 230V.(Outdoor, Indoor)  
2. Check the communication wires are correctly connected.  
■ Adjust the connection of wire  
■ Confirm the wire of "Live", "Neutral".  
3. Check the resistance between communication line and GND.(Normal : Over 2MΩ)  
4. Check the connector for communication is correctly connected.  
5. Check the connection of GND1, GND2, and main GND.  
6. If one indoor unit is operated normally, outdoor PCB is no problem.  
■ Check the another indoor unit.  
* CH05 is displayed at indoor unit, CH53 is displayed at outdoor unit.  
Service Manual 73  
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Troubleshooting Guide  
Error  
code  
Title  
Cause of error  
Check point & Normal condition  
• Check the discharge pipe sensor.  
• Check the install condition for over load.  
• Check the leakage of refrigerent.  
• Check the SVC V/V open.  
• Discharge sensor  
temp. high  
33  
D-Pipe Temp. High  
COMP OFF  
115°C(239°F)  
LEV OPEN(16PULSE/MIN)  
100°C(212°F)  
LEV OPEN(10PULSE/MIN)  
95°C(203°F)  
NORMAL  
A3UH363FA0(LMU360HE)/A3UC363FA0(LMU360CE)  
■ Check Point  
1. Check the install condition for over load.  
2. Check the SVC V/V open.  
3. Check the leakage of refrigerent.  
4. Check the constant compressor.  
Error  
code  
Title  
Cause of error  
Check point & Normal condition  
• Over Capacitor com-  
bination  
• Check the indoor unit capacity.  
• Check the combination table  
51  
Capacitor error  
■ Check Point  
1. Check the indoor unit capacity.  
2. Check the combination table.  
■ In the tropical model case  
■ single cycle has no error for over capacity.  
74 Multi type Air Conditioner  
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Troubleshooting Guide  
Error  
code  
Title  
Cause of error  
• Open / Short  
• Soldered poorly  
• Internal circuit error  
Check point & Normal condition  
Normal resistor : 10KΩ / at 25°C(77°F) (Unplugged)  
Normal voltage : 2.5Vdc / at 25°C(77°F) (plugged)  
44  
45  
47  
Outdoor air sensor  
• Open / Short  
• Soldered poorly  
• Internal circuit error  
Normal resistor : 5KΩ/ at 25°C(77°F) (Unplugged)  
Normal voltage : 2.5Vdc / at 25°C(77°F) (plugged)  
Condensor pipe sensor  
D-Pipe sensor  
• Open / Short  
• Soldered poorly  
• Internal circuit error  
Normal resistor : 200KΩ/ at 25°C(77°F) (Unplugged)  
Normal voltage : 4.5Vdc / at 25°C(77°F) (plugged)  
Ω
Ω
Check the resistance  
■ Check Point  
1. Estimate the resistance of each sensor.(Unplugged)  
2. Estimate the voltage of each sensor.(Plugged)  
3. If the resistance is 0V or 5Vdc, then sensor is abnormal  
Service Manual 75  
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2-way, 3-way Valve  
2-way, 3-way Valve  
2-way Valve (Liguid Side)  
3-way Valve (Gas Side)  
Valve cap  
Hexagonal wrench  
(4mm)  
Open position  
Closed position  
Flare nut  
Flare nut  
Open position  
Pin  
Closed position  
To  
To  
piping  
piping  
Service  
port cap  
Service  
port  
connection  
connection  
To outdoor unit  
To outdoor unit  
Works  
Shaft position  
Shaft position  
Service port  
Shipping  
Closed  
Closed  
Closed  
(with valve cap)  
(with valve cap)  
(with cap)  
Air purging  
Open  
Closed  
Open  
(Installation)  
(counter-clockwise)  
(clockwise)  
(push-pin or with  
vacuum pump)  
1.  
2.  
Operation  
Open  
Open  
Closed  
(with valve cap)  
(with valve cap)  
(with cap)  
Pumping down  
(Transfering)  
Closed  
Open  
Open  
(clockwise)  
(counter-clockwise)  
(connected  
manifold gauge)  
Evacuation  
(Servicing)  
Open  
Open  
Open  
Open  
Open  
Open  
Open  
Open  
Open  
3.  
4.  
(with charging  
cylinder)  
Gas charging  
(Servicing)  
Open  
(with charging  
cylinder)  
Pressure check  
(Servicing)  
Open  
5.  
6.  
(with charging  
cylinder)  
Gas releasing  
(Servicing)  
Open  
(with charging  
cylinder)  
76 Multi type Air Conditioner  
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2-way, 3-way Valve  
(1) Pumping down  
Liquid side  
Indoor unit  
Outdoor unit  
Close  
2-Way  
valve  
Gas side  
Open  
3-Way  
valve  
Liquid side  
Indoor unit  
Close  
2-Way  
valve  
Gas side  
Open  
3-Way  
valve  
manifold gauge  
Low-  
handle  
(CLOSE)  
Hi- handle  
(CLOSE)  
• Procedure  
6. Operate the air conditioner at the cooling cycle  
1. Confirm that both the gas side and liquid side  
valves are set to the open position.  
2
and stop it when the gauge indicates 1kg/cmg.  
- Remove the valve stem caps and confirm that the  
valve stems are in the raised position.  
7. Immediately set the gas side valve to the closed  
position.  
- Do this quickly so that the gauge ends up indicat-  
- Be sure to use a hexagonal wrench to operate  
the valve stems.  
ing 1kg/  
g.  
8. Disconnect the charge set, and mount the liquid  
side and gas side valve caps and the service port  
nut.  
2. Operate the unit for 10 to 15 minutes.  
3. Stop operation and wait for 3 minutes, then con-  
nect the manifold gauge to the service port of the  
gas side valve.  
- Use torque wrench to tighten the service port nut  
to a torque of 1.8kg.m.(4.2kg.m/5.5kg.m)  
- Connect the hose of the gauge with the push pin  
to the service port.  
- Be sure to check for gas leakage.  
4. Air purging of the charge hose.  
- Open the Low-handle valve on the gauge  
slightly to air purge from the hose.  
5. Set the liquid side valve to the closed position.  
• Be sure to short pressure S/W. otherwise Low pressure S/W detect low pressure skete and stops the compressor.  
Service Manual 77  
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2-way, 3-way Valve  
(2) Evacuation  
(All amount of refrigerant leaked)  
Liquid side  
Indoor unit  
Outdoor unit  
Open  
2-Way  
valve  
Gas side  
Open  
3-Way  
valve  
Liquid side  
Indoor unit  
Open  
2-Way  
valve  
Gas side  
Open  
3-Way  
valve  
manifold gauge  
Vacuum pump  
Low-  
handle  
(OPEN)  
Hi- handle  
(OPEN)  
• Procedure  
6. Disconnect the charge hose from the vacuum  
pump.  
1. Confirm that both the liguid side valve and gas  
side valve are set to the opened position.  
- Vacuum pump oil.  
If the vacuum pump oil becomes dirty or deplet-  
ed,replenish as needed.  
2. Connect the vaccum pump to the center hose of  
the manifold gauge.  
3. Connect the service port of the gas side valve to  
the low side of the gauge.  
7. Mount the valve caps and the service port caps.  
4. Evacuation for approximately one hour.  
- Confirm that the gauge needle has moved  
toward-76 cmHg (vacuum of 4 mmHg or less).  
5. Close the Low handle of the gauge turn off the  
vacuum pump, and confirm that the gauge needle  
does not move(approximately 5 minutes after  
turning off the vacuum pump).  
78 Multi type Air Conditioner  
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2-way, 3-way Valve  
(3) Gas Charging  
(After Evacuation)  
Liquid side  
Indoor unit  
Outdoor unit  
Open  
2-Way  
valve  
Gas side  
Open  
3-Way  
valve  
Liquid side  
Indoor unit  
Open  
2-Way  
valve  
Gas side  
Open  
3-Way  
valve  
manifold gauge  
Charging  
cylinder  
Low-handle  
(OPEN)  
Hi- handle  
(OPEN)  
Check valve  
• Procedure  
1. Connect the gauge to the charging cylinder.  
- Connect the charge hose which you disconnect-  
ed from the vacuum pump to the valve at the  
bottom of the cylinder.  
4. Immediately disconnect the charge hose from  
the gas side valve's service port.  
This is different from previous procedures.  
Because you are charging with liquid refrigerant  
from the gas side, absolutely do not attempt to  
charge with larger amounts of liquid refrigerant  
while operating the air conditioner.  
- If you are using a gas cylinder, also use a scale  
and reverse the cylinder so that the system can  
be charged with liquid.  
2. Purge the air from the charge hose.  
-
Open the valve at the bottom of the cylinder and  
press the check valve on the charge set to purge  
the air. (Be careful of the liquid refrigerant). The  
procedure is the same if using a gas cylinder.  
- Stopping partway will allow the gas to be dis-  
charged.  
- If the system has been charged with liquid  
refrigerant while operating the air conditioner  
turn off the air conditioner before disconnecting  
the hose.  
3. Open the low handle on the gauge and charge  
the system with liquid refrigerant.  
- If the system can not be charged with the speci-  
fied amount of refrigerant, it can be charged  
with a little at a time (approximately 150g each  
time) while operating the air conditioner in the  
cooling cycle; however, one time is not suffi-  
cient, wait approximately 1 minute and then  
repeat the procedure(pumping down-pin).  
5. Mount the valve stem nuts and the service port  
nut.  
- Use torque wrench to tighten the service port  
nut to a torque of 1.8 kg.m.(4.2kg.m/5.5kg.m.)  
- Be sure to check for gas leakage.  
Service Manual 79  
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Exploded View & Replacement Parts List  
Exploded View & Replacement Parts List  
Indoor Unit  
S4, SE chassis  
135311  
152302-1  
152302-2  
135301  
131410  
733010  
152313  
342800  
354210  
359011  
135312  
135500  
159901  
346810  
35211B  
268712  
135516  
352150  
147582  
146811  
263230-2  
263230-1  
268714  
668713  
267110  
249951  
80 Multi type Air Conditioner  
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Exploded View & Replacement Parts List  
Parts List (S4, SE chassis)  
PART No.  
S4 chassis  
SE chassis  
SVC  
CODE  
LOCATION  
DESCRIPTION  
No.  
AMNH093D4A0 AMNC093D4A0 AMNH123DEA0 AMNC123DEA0  
(LMN090HE)  
(LMN090CE)  
(LMN120HE)  
(LMN120CE)  
131410 CHASSIS ASSEMBLY  
135311 GRILLE ASSEMBLY,FRONT(INDOOR)  
135301 GRILLE,FRONT  
3141A20019C  
3531A14003K  
3530A10253A  
5230A20051B  
5230A20051D  
3531A11307A  
5990A20069A  
4758A30052A  
4681A20055A  
6871A20680D  
3551A20156B  
4681AR2295L  
5231A20040A  
4995A20831A  
6871A20782A  
6871A20989A  
6323AQ3226T  
6323A20004A  
6711A20128C  
4280A20004B  
5421A20222C  
5211A21363E  
5251A20011B  
5901A20017F  
3301A20020C  
3550A30262A  
3141A20019C  
3531A14003K  
3530A10253A  
5230A20051B  
5230A20051D  
3531A10307V  
5990A20069A  
4758A30052A  
4681A20055A  
6871A20680F  
3551A20156B  
4681AR2295L  
5231A20040A  
4995A20831A  
6871A20782A  
6871A20989D  
6323AQ3226T  
6323A20004A  
6711A20128A  
4280A20004B  
5421A20222C  
5211A21363E  
5251A20011B  
5901A20017F  
3301A20020C  
3550A30262A  
3141A20034A  
3531A18015A  
3530A10287A  
5230A20064A  
5230A20064A  
3531A11362A  
5990A20068A  
4758A30057A  
4681A20055A  
6871A20680D  
3551A20156B  
4681AR2295L  
5231A20040K  
4995A20831A  
6871A20782A  
6871A20989B  
6323AQ3226T  
6323A20004A  
6711A20128C  
4280A20004B  
5421A20282A  
5211A15008A  
5251A20011G  
5901A20017H  
3301A20020A  
3550A30315A  
3141A20034A  
3531A18015A  
3530A10287A  
5230A20064A  
5230A20064A  
3531A11362B  
5990A20068A  
4758A30057A  
4681A20055A  
6871A20680F  
3551A20156B  
4681AR2295L  
5231A20040K  
4995A20831A  
6871A20782A  
6871A20989C  
6323AQ3226T  
6323A20004A  
6711A20128A  
4280A20004B  
5421A20282A  
5211A15008A  
5251A20011G  
5901A20017H  
3301A20020A  
3550A30315A  
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
152302-1 FILTER,AIR  
152302-2 FILTER,AIR  
135312 GRILLE ASSEMBLY,DISCHARGE(INDOOR)  
159901 LOUVER,HORIZONTAL  
147582 LOUVER,VERTICAL  
146811 MOTOR,DC  
268712 PCB ASSEMBLY,DISPLAY  
135516 COVER ASSEMBLY,MOTOR  
346810 MOTOR,DC  
152313 FILTER ASSEMBLY,DEODORIZER  
249951 CASE ASSEMBLY,CONTROL(INDOOR)  
268714 PCB ASSEMBLY,MAIN  
668713 PCB ASSEMBLY(OPTION PCB)  
263230-1 THERMISTOR,NTC  
263230-2 THERMISTOR,NTC  
267110 REMOTE CONTROLLER ASSEMBLY  
342800 BEARING  
354210 EVAPORATOR ASSEMBLY,FINAL  
35211B TUBE ASSEMBLY,TUBING  
352150 HOSE ASSEMBLY,DRAIN  
359011 FAN ASSEMBLY,CROSS FLOW  
733010 PLATE ASSEMBLY,INSTALLATION  
135500 COVER  
NOTE) Please ensure GCSC since these parts may be changed depending upon the buyer's request.  
*
(GCSC WEBSITE http://biz.LGservice.com)  
Service Manual 81  
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Exploded View & Replacement Parts List  
SP3 Chassis Art Cool Type  
82 Multi type Air Conditioner  
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Exploded View & Replacement Parts List  
Parts List (SP3 chassis)  
PART No.  
SVC  
CODE  
LOCATION  
DESCRIPTION  
AMNH093APM0 AMNC093APM0 AMNH123APM0 AMNC123APM0  
(LMAN090HNS) (LMAN090CNS) (LMAN120HNS) (LMAN120CNS)  
No.  
131410 CHASSIS ASSEMBLY  
3141A20030C  
3141A20030C  
3531A21035T  
3531A20212K  
5230A20032A  
6871A20462B  
6871A20259B  
6871A20363D  
3550A20123C  
3550A20124B  
3550A20060A  
3551A20031H  
4758A20014B  
4681A20055A  
5983A20007F  
4995A20832A  
6871A20387M  
6323A20004N  
3141A20030C  
3531A21035N  
3531A20212K  
5230A20032A  
6871A20462A  
6871A20259B  
6871A20363D  
3550A20123C  
3550A20124B  
3550A20060A  
3551A20031H  
4758A20014B  
4681A20055A  
5983A20007F  
4995A20832D  
6871A20387M  
6323A20004N  
6323AQ3226T  
6711A20128F  
3087A30004A  
4681A20047B  
4960A20016A  
5211AR7066F  
5251AR1222R  
5421A20072A  
5900A00003A  
3141A20030C  
3531A21035T  
3531A20212K  
5230A20032A  
6871A20462B  
6871A20259B  
6871A20363D  
3550A20123C  
3550A20124B  
3550A20060A  
3551A20031H  
4758A20014B  
4681A20055A  
5983A20007F  
4995A20832C  
6871A20387N  
6323A20004N  
6323AQ3226T  
6711A20083R  
3087A30004A  
4681A20047B  
4960A20016A  
5211AR7066F  
5251AR1222R  
5421A20072A  
5900A00003A  
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
135312 GRILLE ASSEMBLY,FRONT(INDOOR) 3531A21035N  
135314 GRILLE ASSEMBLY,INLET  
152302 FILTER, AIR  
3531A20212K  
5230A20032A  
6871A20462A  
6871A20259B  
6871A20363D  
3550A20123C  
3550A20124B  
3550A20060A  
3551A20031H  
4758A20014B  
4681A20055A  
5983A20007F  
268712 PCB ASSEMBLY,DISPLAY  
268717-1 PCB ASSEMBLY,SUB  
268717-2 PCB ASSEMBLY,SUB  
135500-1 COVER  
135500-2 COVER  
135500-3 COVER  
135515 COVER ASSEMBLY,TOP(INDOOR)  
147581 LOUVER,HORIZONTAL  
146811 MOTOR,DC  
159830 FILTER ASSEMBLY,AIR CLEANER  
249951 CASE ASSEMBLY,CONTROL(INDOOR) 4995A20832B  
268714 PCB ASSEMBLY 6871A20387K  
263230-2 THERMISTOR,NTC(ROOM+IN PIPE) 6323A20004N  
263230-1 THERMISTOR,NTC(OUT PIPE) 6323AQ3226T 6323AQ3226T  
267110 REMOTE CONTROLLER ASSEMBLY 6711A20128F  
6711A20083R  
3087A30004A  
4681A20047B  
4960A20016A  
5211AR7066F  
330870 PAN ASSEMBLY,DRAIN  
346810 MOTOR,UNCLASSIFIED  
349600 BRACKET,MOTOR  
3087A30004A  
4681A20047B  
4960A20016A  
5211AR7066F  
35211B TUBE ASSEMBLY,TUBING  
352150 HOSE ASSEMBLY,DRAIN  
354210 EVAPORATOR ASSEMBLY,FIRST  
359012 FAN,TURBO  
5251AR1222R 5251AR1222R  
5421A20072A  
5900A00003A  
5421A20072A  
5900A00003A  
NOTE) Please ensure GCSC since these parts may be changed depending upon the buyer's request.  
*
(GCSC WEBSITE http://biz.LGservice.com)  
Service Manual 83  
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Exploded View & Replacement Parts List  
Outdoor Unit  
A3UH363FA0(LMU360HE), A3UC363FA0(LMU360CE)  
84 Multi type Air Conditioner  
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Exploded View & Replacement Parts List  
Parts List (A3UH363FA0(LMU360HE), A3UC363FA0(LMU360CE))  
PART No.  
LOCATION  
No.  
SVC  
CODE  
DESCRIPTION  
A3UH363FA0(LMU360HE) A3UC363FA0(LMU360CE)  
135301  
135314  
GRILLE,DISCHARGE  
3530A20006G  
3530A10176B  
6323A20028A  
6323A20026A  
3041AP2741H  
3551A10044G  
3H03266H  
3530A20006G  
3530A10176B  
6323A20028A  
6323A20026A  
3041AP2741H  
3551A10044H  
3H03266H  
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
GRILLE,REAR  
263230-1  
263230-2  
430410  
THERMISTOR, NTC  
THERMISTOR, NTC  
BASE ASSEMBLY, OUTDOOR  
COVER ASSEMBLY,CONTROL(OUTDOOR)  
COVER ASSEMBLY,TOP(OUTDOOR)  
PANEL ASSEMBLY,FRONT(OUTDOOR)  
BARRIER ASSEMBLY,OUTDOOR  
MOTOR ASSEMBLY,OUTDOOR  
ACCUMULATOR ASSEMBLY(MECH)  
TUBE ASSEMBLY,CONDENSER IN  
TUBE ASSEMBLY, CONDENSER OUT  
TUBE ASSEMBLY, REVERSING  
TUBE ASSEMBLY, SUCTION(OUTDOOR)  
CONDENSER ASSEMBLY, BENDING  
FAN ASSEMBLY, PROPELLER  
COIL ASSEMBLY, REVERSING VALVE  
CASE ASSEMBLY,CONTROL(OUTDOOR)  
PWB(PCB) ASSEMBLY,MAIN(AC)  
PWB(PCB) ASSEMBLY,MAIN(OUTDOOR)  
PANEL ASSEMBLY, SIDE  
435511  
435512  
437211  
3721A10109C  
4791A10019B  
4681AR1392X  
4848A20006L  
5211A11010A  
5211A12001A  
AJR30111101  
AJR30125001  
5403A20168A  
5901A10033A  
3A02028Z  
3721A10109C  
4791A10019B  
4681AR1392X  
4848A20006L  
5211A11010A  
5211A12001A  
AJR30111101  
AJR30125001  
5403A20168C  
5901A10033A  
-
447910  
546810  
548490  
552112  
552113  
552116  
552117  
554031  
559010  
561410  
649950  
4995A00002H  
6871A20500B  
6871A20479E  
3721A10110A  
3721A10111C  
5220A20001K  
2H02479J  
4995A00002H  
6871A20500B  
6871A20479E  
3721A10110A  
3721A10111C  
5220A20001K  
2H02479J  
668711-1  
668711-2  
137213-1  
137213-2  
552203-1  
552203-2  
554160-1  
554160-2  
561411-1  
561411-2  
561411-3  
W0CZZ-1  
W0CZZ-2  
567502  
PANEL ASSEMBLY, SIDE  
VALVE,SERVICE  
VALVE,SERVICE  
COMPRESSOR  
2520UHGK2AA  
TBZ30111701  
6877A20050A  
6877A20050B  
6877A20050C  
0CZZA20007Q  
2H01451S  
2520UHGK2AA  
TBZ30111701  
6877A20050A  
6877A20050B  
6877A20050C  
0CZZA20007Q  
2H01451S  
COMPRESSOR  
DRAWING,ASSEMBLY(EEV COIL)  
DRAWING,ASSEMBLY(EEV COIL)  
DRAWING,ASSEMBLY(EEV COIL)  
CAPACITOR,FILM,BOX  
CAPACITOR,FILM,BOX  
O.L.P  
6750U-L048A  
6750U-L048A  
NOTE) Please ensure GCSC since these parts may be changed depending upon the buyer's request.  
*
(GCSC WEBSITE http://biz.LGservice.com)  
Solenoid(Coil Assembly, Reverse) is only for heat pump model.  
Service Manual 85  
Download from Www.Somanuals.com. All Manuals Search And Download.  
May, 2006  
Printed in Korea  
P/No.: 3828A20474C  
Download from Www.Somanuals.com. All Manuals Search And Download.  

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