Heat Controller Inc Air Conditioner A MMH24FA 1 User Manual
HEAT CONTROLLER, INC.  
Wall Mounted  
Multi-Zone Split System  
Air Conditioning/Heat Pump  
Indoor Unit: B-MMC09FA-1  
B-MMH09FA-1  
B-MMC12FA-1  
B-MMH12FA-1  
Outdoor Unit :A-MMC18FA-1  
A-MMH18FA-1  
A-MMC24FA-1  
A-MMH24FA-1  
A-MMC36FA-1  
A-MMH36FA-1  
Before servicing the unit, read the  
“safety precautions” in this manual.  
Only for authorized service personnel.  
Combination table  
Combination table  
18 kBtu/h( 2 rooms)  
Combination  
Indoor Unit A(kBtu/h)  
9
Indoor Unit B(kBtu/h)  
9
Total(kBtu/h)  
18  
2 Indoor Units  
24 kBtu/h( 2 rooms)  
Combination  
Indoor Unit A(kBtu/h)  
12  
Indoor Unit B(kBtu/h)  
12  
Total(kBtu/h)  
24  
2 Indoor Units  
36 kBtu/h (3 rooms)  
Combination  
Indoor Unit A(kBtu/h) Indoor Unit B(kBtu/h) Indoor Unit C(kBtu/h)  
Total(kBtu/h)  
36  
3 Indoor Units  
12  
12  
12  
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  
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.  
Service Manual  
- 3 -  
Safety Precautions  
Safety Precautions  
To prevent injury to the user or other people and property damage, the following instructions must  
be followed.  
I 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.  
I Meanings of symbols used in this manual are as shown below.  
Be sure not to do.  
Be sure to follow the instruction.  
WARNING  
I 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.  
Wall Mounted Multi-Zone Split System Air Conditioner  
- 4 -  
Safety Precautions  
Do not install, remove, or re-  
install the unit by yourself  
(customer).  
Be cautious when unpacking  
and installing the product.  
For installation, always con-  
tact the dealer or an  
Authorized Service Center.  
• There is risk of fire, electric shock, • Sharp edges could cause injury.  
• There is risk of fire, electric shock,  
explosion, or injury.  
explosion, or injury.  
Be especially careful of the case  
edges and the fins on the con-  
denser and evaporator.  
Do not install the product on a Be sure the installation area  
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.  
defective installation stand.  
does not deteriorate with age.  
• It may cause injury, accident, or  
damage to the product.  
• If the base collapses, the air condi- • Moisture may condense and wet or  
tioner could fall with it, causing  
property damage, product failure,  
and personal injury.  
damage furniture.  
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  
Service Manual  
- 5 -  
Safety Precautions  
When flammable gas leaks,  
turn off the gas and open a  
window for ventilation before  
turn the product on.  
If strange sounds or smoke  
come from the product, turn  
the breaker off.  
Stop operation and close the  
window in storm or hurricane.  
If possible, remove the prod-  
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.  
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 never enter the product.  
an Authorized Service Center.  
Be cautious that water can  
• There is risk of physical injury,  
electric shock, or product failure.  
• There is risk of fire or electric  
shock.  
• There is risk of fire, electric 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.  
Wall Mounted Multi-Zone Split System Air Conditioner  
- 6 -  
Safety Precautions  
When the product is not being used for a long time,  
disconnect the power by turning 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  
I 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°  
Do not install the product  
where the noise or hot air  
from the outdoor unit could  
offend neighbors.  
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.  
Service Manual  
- 7 -  
Safety Precautions  
I Operational  
Do not expose the skin direct-  
ly to cool air for long periods  
of time.  
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.  
Do not block the inlet or outlet  
of air flow.  
(Don't sit in the draft.)  
• This could harm to your health.  
• There is risk of damage or loss of  
property.  
• It may cause product failure.  
Use a soft cloth to clean. Do  
not use harsh detergents, sol-  
vents, etc.  
Do not touch the metal parts of Do not step on or put anyting  
the product when removing the on the product. (outdoor  
air filter. They are very sharp!  
units)  
• There is risk of fire, electric shock, • There is risk of personal injury.  
or damage to the plastic parts of  
• There is risk of personal injury and  
failure of product.  
the product.  
Always insert the filter secure- Do not insert hands or other  
Do not drink the water drained  
ly. Clean the filter every two  
weeks or more often if neces-  
sary.  
objects through the air inlet or from the product.  
outlet while the product is  
operating.  
•
A dirty filter reduces the efficiency of • There are sharp and moving parts • It is not sanitary and could cause  
the air conditioner and could cause  
product malfunction or damage.  
that could cause personal injury.  
serious health issues.  
Wall Mounted Multi-Zone Split System Air Conditioner  
- 8 -  
Safety Precautions  
Use a firm stool or ladder when cleaning or  
maintaining the product.  
Replace the all batteries in the remote control  
with new ones of the same type. Do not mix  
old and new batteries or different types of bat-  
teries.  
• Be careful and avoid personal injury.  
• There is risk of fire or explosion  
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.  
If you ingest the liquid from the batteries, call your  
local poison control center or a doctor.  
Do not use the remote is the batteries have leaked.  
• The chemicals in batteries could cause burns or other  
health hazards.  
Service Manual  
- 9 -  
Seaside applications and installation  
Seaside applications and installation  
1. Air conditioners should not be installed in areas where corrosive gases, such as acid or alkaline gas, are produced.  
2. Do not install the product where it could be exposed to sea wind (salty wind) directly. It can result corrosion  
on the product. Corrosion, particularly on the condenser and evaporator fins, could cause product malfunc-  
tion or inefficient performance.  
3. If outdoor unit is installed close to the seaside, it should avoid direct exposure to the sea wind.  
Selecting the location(Outdoor Unit)  
1) If the outdoor unit is to be installed close to the seaside, direct exposure to the sea wind should be avoided.  
Install the outdoor unit on the opposite side of the sea wind direction.  
Sea wind  
Sea wind  
2) To install the outdoor unit on the seaside, set up a windbreaker/barrier to keep the unit from being exposed to  
the sea wind.  
• It should be strong enough (like concrete) to  
Windbreaker/Barrier  
obstruct the wind from the sea.  
• The height and width should be more than 150% of  
the outdoor unit.  
Sea wind  
•
A minimum of 70cm (27.6inches) of space between  
outdoor unit and the windbreaker/barrier for easy  
air flow.  
3) Select a well-drained place.  
1. Periodic ( more than once/year ) cleaning of dust or salt particles stuck on the heat exchanger using water is recommended.  
Wall Mounted Multi-Zone Split System Air Conditioner  
- 10 -  
Dimensions  
Dimensions  
Indoor Unit  
Split Type Indoor  
H
D
W
Installation plate  
Model  
Split Type  
Dimension  
9 kBtu/h  
840(33)  
12 kBtu/h  
W
H
mm(in)  
mm(in)  
mm(in)  
895(35.2)  
282(11.1)  
165(6.5)  
270(10.6)  
153(6)  
D
Service Manual  
- 11 -  
Dimensions  
Outdoor Unit  
W
L6  
L5  
L7  
MODEL  
UE  
18kBtu/h  
DIM  
W
mm(in)  
870(34.3)  
655(25.8)  
320(12.6)  
370(14.6)  
25(1.0)  
H
mm(in)  
mm(in)  
mm(in)  
mm(in)  
mm(in)  
mm(in)  
mm(in)  
mm(in)  
mm(in)  
D
L1  
L2  
L3  
L4  
L5  
L6  
L7  
775(30.5)  
25(1.0)  
546(21.5)  
160(6.3)  
160(6.3)  
Wall Mounted Multi-Zone Split System Air Conditioner  
- 12 -  
Dimensions  
W
L6  
L5  
L7  
MODEL  
UE 1  
24kBtu/h  
DIM  
W
H
mm(in)  
870(34.3)  
808(31.8)  
320(12.6)  
370(14.6)  
25(1.0)  
mm(in)  
mm(in)  
mm(in)  
mm(in)  
mm(in)  
mm(in)  
mm(in)  
mm(in)  
mm(in)  
D
L1  
L2  
L3  
L4  
L5  
L6  
L7  
775(30.5)  
25(1.0)  
546(21.5)  
160(6.3)  
160(6.3)  
Service Manual  
- 13 -  
Dimensions  
W
Gas side  
3-way valve  
Liquid side  
2-way valve  
L9  
L7  
L6  
L8  
MODEL  
UE2  
36kBtu/h  
DIM  
W
mm(in)  
870(34.3)  
1038(40.7)  
320(12.6)  
360(14.2)  
340(13.4)  
25(1.0)  
H
mm(in)  
mm(in)  
mm(in)  
mm(in)  
mm(in)  
mm(in)  
mm(in)  
mm(in)  
mm(in)  
mm(in)  
mm(in)  
mm(in)  
mm(in)  
D
L1  
L2  
L3  
L4  
L5  
L6  
L7  
L8  
L9  
L10  
L11  
1035(40.8)  
25(1.0)  
546(21.5)  
160(6.3)  
160(6.3)  
44(11.7)  
64.5(2.5)  
50(2.0)  
Wall Mounted Multi-Zone Split System Air Conditioner  
- 14 -  
Product Specifications  
Product Specifications  
Indoor Unit  
Indoor Unit Type  
Model  
Wall Mounted  
B-MMC09FA-1  
B-MMH09FA-1  
B-MMC12FA-1  
B-MMH12FA-1  
Nominal Cooling Capacity  
kcal/h(W)  
Btu/h  
2,267(2,637)  
2,267(2,637)  
3,023(3,516)  
12,000  
-
3,023(3,516)  
9,000  
-
9,000  
12,000  
3,023(3,516)  
12,000  
Nominal Heating Capacity  
kcal/h(W)  
Btu/h  
2,267(2,637)  
9,000  
-
-
Air Circulation  
CFM(CMM)  
°C  
289(8.2)  
18~30  
289(8.2)  
18~30  
332(9.4)  
18~30  
332(9.4)  
18~30  
Setting temperature range(cool/heat)  
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  
pints/day  
inch(mm)  
lbs(kg)  
12.4  
13.5  
33.0*10.6*6.0(840*270*153) 33.0*10.6*6.0(840*270*153) 35.2*11.1*6.5(895*282*165) 35.2*11.1*6.5(895*282*165)  
15.4(7)  
1/4 (6.35)  
3/8 (9.52)  
0.79(20)  
15.4(7)  
1/4 (6.35)  
3/8 (9.52)  
0.79(20)  
20.9(9.5)  
1/4 (6.35)  
3/8 (9.52)  
0.79(20)  
20.9(9.5)  
1/4 (6.35)  
3/8 (9.52)  
0.79(20)  
Piping Connection Liquid  
Gas  
inch(mm)  
inch(mm)  
inch(mm)  
inch(mm)  
20/40ft(hi-c)  
Drain hose (ID Ø)  
Packing Dimension (W*H*D)  
Stuffing Quantity With(Without) S/Parts  
35.7*13.1*8.8(906*332*223) 35.7*13.1*8.8(906*332*223) 38.3*9.1*14.6(973*231*372) 38.3*9.1*14.6(973*231*372)  
440/910 (1091)  
440/910 (1091)  
353/719 (792)  
353/719 (792)  
Note : 1. Due to our policy of innovation some specifications may be changed without notification.  
Service Manual  
- 15 -  
Product Specifications  
Outdoor Unit - Multiple piping models  
Model  
A-MMC18FA-1  
A-MMH18FA-1  
18,000  
18,000  
Cooling Capacity  
Heating Capacity  
Btu/hr  
W
5,275  
5,275  
4,536  
4,536  
kcal/hr  
Btu/hr  
W
-
18,000  
-
5,275  
-
4,536  
kcal/hr  
W
1,978  
1,978  
Input  
Cooling  
Heating  
Cooling  
Heating  
-
1,960  
W
8.8  
8.8  
Running Current(208/230V)  
Power Supply  
A
-
8.6  
A
1,208/230,60  
1,208/230,60  
Ø,V,Hz  
2
2
Max. Number of Connectable Indoor Units  
Rotary  
Rotary  
Compressor  
(Constant)  
Type  
GK094K  
GK094K  
Model  
Hermetic  
Hermetic  
Motor Type  
Quantity  
1
1
Ea  
W
955  
955  
Motor Input  
Oil Charge  
Oil Type  
330 10  
330 10  
cc  
FVC68D  
FVC68D  
30 / 370  
30 / 370  
Capacitor  
µF/Vac  
External Type(MRA98996-12026)  
External Type(MRA98996-12026)  
O.L.P Type(model name)  
Type  
Rotary  
Rotary  
Compressor  
(Constant)  
GK113K  
GK113K  
Model  
Hermetic  
Hermetic  
Motor Type  
Quantity  
1
1
Ea  
W
1,120  
1,120  
Motor Input  
Oil Charge  
Oil Type  
330 10  
330 10  
cc  
FVC68D  
FVC68D  
35 / 370  
35 / 370  
Capacitor  
µF/Vac  
oz(g)  
External Type(MRA12124-12026)  
External Type(MRA12124-12026)  
O.L.P Type(model name)  
Charge  
49.4(1400)  
49.4(1400)  
Refrigerant charge  
Coil  
R410A  
R410A  
Type  
EEV  
EEV  
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,28C  
2R,28C  
IC-1640LG GE  
IC-1640LG GE  
Fan motor  
Fan  
90  
90  
Output  
W
6/370  
6/370  
Capacitor  
µF/Vac  
Propeller  
Propeller  
Type  
1765.7(50)  
1765.7(50)  
No. Used / Diameter  
Discharge  
Outdoor  
CFM(CMM)  
Side / Top  
CMM(CFM)  
Side  
Side  
50(1765.7)  
50(1765.7)  
Air Circulation  
51  
51  
Invertion Cycle  
1/4 (6.35) * 2EA  
3/8 (9.52) * 2EA  
34.3*25.8*12.6 (870*655*320)  
125.7(57)  
Noise Level(H/L) at 230V Sound Press,1m  
Defrosting  
dB(A)  
1
-
1/4 (6.35) * 2EA  
SVC Valve  
Liquid  
Gas  
inch(mm)  
3/8 (9.52) * 2EA  
34.3*25.8*12.6 (870*655*320)  
Dimensions  
Net Weight  
W*H*D  
Outdoor  
inch(mm)  
lbs(kg)  
ft(m)  
125.7(57)  
98.4(30)  
98.4(30)  
Max. Interunit Piping Length Total of Each Room  
For One Room  
49.2(15)  
49.2(15)  
ft(m)  
24.6(7.5)  
24.6(7.5)  
Max. Installation  
Height Difference  
Packing Dimension  
Stuffing Quantity  
SEER  
Indoor Unit~Outdoor Unit  
Indoor Unit~Indoor Unit  
W*H*D  
ft(m)  
24.6(7.5)  
24.6(7.5)  
ft(m)  
40.2*28.2*17.2 (1020*716*437)  
40.2*28.2*17.2 (1020*716*437)  
81/171  
inch(mm)  
20/40ft  
81/171  
13.0  
-
13.0  
7.7  
HSPF  
Note:  
1. Capacities are based on the following conditions:  
2. Wiring cable size must comply with the applicable local and national code.  
3. Capacities are Net Capacities.  
Cooling:  
- Indoor Temperature 26.7˚C(80˚F) DB/19.4˚C(67˚F) WB  
- Outdoor Temperature 35˚C(95˚F) DB/23.9˚C(75˚F) WB  
- Indoor Temperature 21.1˚C(70˚F) DB/15.6˚C(60˚F) WB  
- Outdoor Temperature 8.3˚C(47˚F) DB/6.1˚C(43˚F) WB  
4. The specification may be subject to change without prior notice for purpose  
of improvement.  
Heating:  
Piping Length - Interconnecting Piping Length 24.6 ft(7.5m)  
- Level Difference of Zero  
Wall Mounted Multi-Zone Split System Air Conditioner  
- 16 -  
Product Specifications  
Model  
A-MMC24FA-1  
A-MMH24FA-1  
24,000  
24,000  
Cooling Capacity  
Heating Capacity  
Btu/hr  
W
7,033  
7,033  
6,037  
6,037  
kcal/hr  
Btu/hr  
W
-
24,000  
-
7,033  
-
6,037  
kcal/hr  
W
2,526  
2,526  
Input  
Cooling  
Heating  
Cooling  
Heating  
-
2440  
W
11.4  
11.4  
Running Current(208/230V)  
Power Supply  
A
-
11.1  
A
1,208/230,60  
1,208/230,60  
Ø,V,Hz  
2
2
Max. Number of Connectable Indoor Units  
Rotary  
Rotary  
Compressor  
(Constant)  
Type  
GK094K  
GK094K  
Model  
Hermetic  
Hermetic  
Motor Type  
Quantity  
1
1
Ea  
W
955  
955  
Motor Input  
Oil Charge  
Oil Type  
330 10  
330 10  
cc  
FVC68D  
FVC68D  
30 / 370  
30 / 370  
Capacitor  
µF/Vac  
External Type(MRA98996-12026)  
External Type(MRA98996-12026)  
O.L.P Type(model name)  
Type  
Rotary  
Rotary  
Compressor  
(Constant)  
GK141K  
GK141K  
Model  
Hermetic  
Hermetic  
Motor Type  
Quantity  
1
1
Ea  
W
1430  
1,430  
Motor Input  
Oil Charge  
Oil Type  
350 10  
350 10  
cc  
FVE  
FVE  
35 / 370  
35 / 370  
Capacitor  
µF/Vac  
oz(g)  
External Type(MRA12105-12026)  
External Type(MRA12105-12026)  
O.L.P Type(model name)  
Charge  
56.4(1,600)  
56.4(1,600)  
Refrigerant charge  
Coil  
R410A  
R410A  
Type  
EEV  
EEV  
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,36C  
2R,36C  
IC-1640LG GE  
IC-1640LG GE  
Fan motor  
Fan  
90  
90  
Output  
W
6/370  
6/370  
Capacitor  
µF/Vac  
Propeller  
Propeller  
Type  
1 / 460  
1 / 460  
No. Used / Diameter  
Discharge  
Outdoor  
CFM(CMM)  
Side / Top  
CMM(CFM)  
Side  
Side  
1872(53)  
1872(53)  
Air Circulation  
54  
54  
Invertion Cycle  
1/4 (6.35) * 2EA  
3/8 (9.52) * 2EA  
34.3*31.8*12.6 (870*808*320)  
141.1(64)  
Noise Level(H/L) at 230V Sound Press,1m  
Defrosting  
dB(A)  
1
-
1/4 (6.35) * 2EA  
SVC Valve  
Liquid  
Gas  
inch(mm)  
3/8 (9.52) * 2EA  
34.3*31.8*12.6 (870*808*320)  
Dimensions  
Net Weight  
W*H*D  
Outdoor  
inch(mm)  
lbs(kg)  
ft(m)  
141.1(64)  
98.4(30)  
98.4(30)  
Max. Interunit Piping Length Total of Each Room  
For One Room  
49.2(15)  
49.2(15)  
ft(m)  
24.6(7.5)  
24.6(7.5)  
Max. Installation  
Height Difference  
Packing Dimension  
Stuffing Quantity  
SEER  
Indoor Unit~Outdoor Unit  
Indoor Unit~Indoor Unit  
W*H*D  
ft(m)  
24.6(7.5)  
24.6(7.5)  
ft(m)  
40.2*34.3*17.2 (1022*870*437)  
40.2*34.3*17.2 (1022*870*437)  
54/114  
inch(mm)  
20/40ft  
54/114  
13.0  
-
13.0  
7.7  
HSPF  
Note:  
1. Capacities are based on the following conditions:  
2. Wiring cable size must comply with the applicable local and national code.  
3. Capacities are Net Capacities.  
Cooling:  
- Indoor Temperature 26.7˚C(80˚F) DB/19.4˚C(67˚F) WB  
- Outdoor Temperature 35˚C(95˚F) DB/23.9˚C(75˚F) WB  
- Indoor Temperature 21.1˚C(70˚F) DB/15.6˚C(60˚F) WB  
- Outdoor Temperature 8.3˚C(47˚F) DB/6.1˚C(43˚F) WB  
4. The specification may be subject to change without prior notice for purpose  
of improvement.  
Heating:  
Piping Length - Interconnecting Piping Length 24.6 ft(7.5m)  
- Level Difference of Zero  
Service Manual  
- 17 -  
Product Specifications  
Model  
A-MMC36FA-1  
A-MMH36FA-1  
Cooling Capacity  
Btu/hr  
W
36,000  
36,000  
10,550  
10,500  
kcal/hr  
Btu/hr  
W
9,071  
9,071  
Heating Capacity  
-
36,000  
-
10,500  
kcal/hr  
W
-
9,071  
Input  
Cooling  
Heating  
Cooling  
Heating  
4,045  
4,045  
W
-
3340  
Running Current(208/230V)  
Power Supply  
A
18.2  
18.2  
A
-
17.9  
Ø,V,Hz  
1,208/230,60  
1,208/230,60  
Max. Number of Connectable Indoor Units  
3
3
Compressor  
(Constant)  
Type  
Rotary  
Rotary  
Model  
GK141K  
GK141K  
Motor Type  
Quantity  
2 Pole Induction(PSC)  
2 Pole Induction(PSC)  
Ea  
W
1
1
Motor Input  
Oil Charge  
Oil Type  
1430  
1430  
cc  
350Å}10  
350Å}10  
FVC68D  
FVC68D  
Capacitor  
µF/Vac  
35 / 370  
35 / 370  
O.L.P Type(model name)  
Type  
External Type  
External Type  
Compressor  
(Constant)  
Rotary  
Rotary  
Model  
GJ230K  
GJ230K  
Motor Type  
Quantity  
2 Pole Induction(PSC)  
2 Pole Induction(PSC)  
Ea  
W
1
1
Motor Input  
Oil Charge  
Oil Type  
2370  
2370  
cc  
700 10  
7000 10  
FVC68D  
FVC68D  
Capacitor  
µF/Vac  
oz(g)  
50 / 400  
50 / 400  
O.L.P Type(model name)  
Charge  
Internal Type  
Internal Type  
Refrigerant charge  
Coil  
84.7(2400)  
84.7(2400)  
Type  
R410A  
R410A  
Control  
EEV  
EEV  
Tube Size (OD)  
Fins per inch  
No. of Rows & Column/No.  
Model  
inch(mm)  
0.276(7.0)  
0.276(7.0)  
18  
18  
2R,48C  
2R,48C  
Fan motor  
Fan  
ARC286B01 * 2  
ARC286B01 * 2  
Output  
W
102  
102  
Capacitor  
µF/Vac  
2/370  
2/370  
Type  
Propeller  
Propeller  
No. Used / Diameter  
Discharge  
Outdoor  
EA/inch(mm)  
Side / Top  
2 / 15.7(400)  
2 / 15.7(400)  
Side  
Side  
Air Circulation  
CFM(CMM)  
2225(63)  
2225(63)  
Noise Level(H/L) at 230V Sound Press,1m  
dB(A)  
1
51  
51  
SVC Valve  
Liquid  
Gas  
inch(mm)  
1/4 (6..35) * 3EA  
1/4 (6..35) * 3EA  
3/8 (9.52) * 3EA  
3/8 (9.52) * 3EA  
Dimensions  
Net Weight  
W*H*D  
Outdoor  
inch(mm)  
lbs(kg)  
ft(m)  
34.3*40.7*12.6 (870*1038*320)  
34.3*40.7*12.6 (870*1038*320)  
185.2(84)  
185.2(84)  
Max. Interunit Piping Length Total of Each Room  
For One Room  
147.6(45)  
147.6(45)  
ft(m)  
49.2(15)  
49.2(15)  
Max. Installation  
Height Difference  
Packing Dimension  
Stuffing Quantity  
SEER  
Indoor Unit~Outdoor Unit  
Indoor Unit~Indoor Unit  
W*H*D  
ft(m)  
24.6(7.5)  
24.6(7.5)  
ft(m)  
24.6(7.5)  
24.6(7.5)  
inch(mm)  
20/40ft  
41.3*44.9*17.3 (1048*1140*439)  
41.3*44.9*17.3 (1048*1140*439)  
53/111  
13.0  
-
53/111  
13.0  
7.7  
HSPF  
Note:  
1. Capacities are based on the following conditions:  
2. Wiring cable size must comply with the applicable local and national code.  
3. Capacities are Net Capacities.  
Cooling:  
- Indoor Temperature 26.7˚C(80˚F) DB/19.4˚C(67˚F) WB  
- Outdoor Temperature 35˚C(95˚F) DB/23.9˚C(75˚F) WB  
- Indoor Temperature 21.1˚C(70˚F) DB/15.6˚C(60˚F) WB  
- Outdoor Temperature 8.3˚C(47˚F) DB/6.1˚C(43˚F) WB  
4. The specification may be subject to change without prior notice for purpose  
of improvement.  
Heating:  
Piping Length - Interconnecting Piping Length 24.6 ft(7.5m)  
- Level Difference of Zero  
Wall Mounted Multi-Zone Split System Air Conditioner  
- 18 -  
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  
Adjustable Wrench  
Torque wrench  
Flaring Tool Set  
Service Manual  
- 19 -  
Installation  
Selecting the best location  
Indoor unit  
1. Do not have any heat or steam near the unit.  
More than 10 cm  
(3.9 inch)  
2. Select a place where there are no obstacles in front  
of the unit.  
More than 20 cm  
(7.9 inch)  
3. Make sure that condensation drainage can be conve-  
niently routed away.  
4. Do not install near a doorway.  
5. Ensure the unit is unobstructed, allow proper space on all sides  
according to the arrows and distance measurements in the figures.  
More than 2.4m  
(8 ft)  
More than 10 cm  
(3.9 inch)  
6. Use a metal detector or stud finder to locate studs to  
prevent unnecessary damage to the wall.  
CAUTION: Install the indoor unit  
on the wall where the height from  
the floors more than 2.4 m (8 ft).  
Outdoor unit  
more than 30 cm  
(11.8 inch)  
18 / 24 kBtu/h  
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 30 cm  
(11.8 inch)  
2. Ensure the unit is unobstructed, allow proper space on all sides  
according to the arrows and distance measurements in the figures.  
3. Do not place animals and plants in the path of the  
warm air.  
more than 70 cm  
(27.6 inch)  
4. Take the air conditioner weight into account and  
select a place where noise and vibration are mini-  
mum.  
more than 60 cm  
(23.6 inch)  
5. Select a place so that the warm air and sound from  
the air conditioner does not disturb neighbors.  
36 kBtu/h  
Rooftop Installations:  
more than 30 cm  
(11.8 inch)  
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.  
more than 30 cm  
(11.8 inch)  
more than 70 cm  
(27.6 inch)  
more than 60 cm  
(23.6 inch)  
Wall Mounted Multi-Zone Split System Air Conditioner  
- 20 -  
Installation  
Piping length and elevation  
Multi Piping Type  
Max Elevation  
between each  
indoor unit and  
outdoor unit (h1)  
Max total length Max length of  
Min length of  
each pipe  
(A/B/C)  
Max elevation  
between indoor  
units (h2)  
Capacity  
of all pipes  
each pipe  
(A/B/C)  
(A+B/A+B+C)  
18 kBtu  
24 kBtu  
36 kBtu  
30 m (100 ft)  
30 m (100 ft)  
45 m (150 ft)  
15 m (50 ft)  
15 m (50 ft)  
15 m (50 ft)  
3 m (10 ft)  
3 m (10 ft)  
3 m (10 ft)  
7.5 m (25 ft)  
7.5 m (25 ft)  
7.5 m (25 ft)  
7.5 m (25 ft)  
7.5 m (25 ft)  
7.5 m (25 ft)  
Pipe Size  
Indoor Capacity  
Additional  
Refrigerant  
Gas  
Liquid  
Standard Length  
9 kBtu  
9.52 mm (3/8")  
6.35 mm (1/4")  
6.35 mm (1/4")  
7.5 m (25 ft)  
7.5 m (25 ft)  
20 g/m (0.22 oz/ft)  
20 g/m (0.22 oz/ft)  
12 kBtu  
9.52 mm (3/8")  
A
A
18 / 24 kBtu/h  
36 kBtu/h  
h2  
h2  
h2  
B
B
h1  
h1  
C
h1  
h1  
h1  
B
CAUTION: Capacity is based on standard length and maximum allowance length is on the  
basis of reliability.  
Service Manual  
- 21 -  
Installation  
Installing 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 regarding the location of the  
installation plate, as routing the wiring through the wall is  
typically done in this application. Drilling the hole through  
the wall for piping connections must be done safely.  
Installation plate  
Distance (mm)  
CHASSIS  
B
D
A
B
C
D
A
C
9 kBtu/h  
50(1.97) 105(4.13) 59(2.32) 105(4.13)  
65(2.56) 110(4.33) 85(3.35) 110(4.33)  
Ø70mm  
Ø70mm  
Left rear piping  
Right rear piping  
12 kBtu/h  
Drilling the hole in the wall  
• Drill the piping hole with a Ø 70 mm (Ø 2.75 inch) 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  
Wall Mounted Multi-Zone Split System Air Conditioner  
- 22 -  
Flaring Work and Connection of Piping  
Flaring Work and Connection of Piping  
Flaring work  
The main cause for gas leakage is due to defects in flaring work. Carry out correct flaring work using the following procedures.  
Cut the pipes  
1. Use the copper pipe 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  
Adding the Flare Nut  
• Remove flare nuts attached to the indoor and outdoor unit,  
then put them on the end of the copper pipe once you hav  
completed burr removal (it is not possible to put them on after  
the flaring work)  
Flare nut  
Copper tube  
Flaring work  
• Carry out flaring work using flaring tool as shown below.  
• Firmly hold copper pipe in the proper size hole dimension of  
the bar as shown in the table below.  
Outside diameter  
A
Handle  
Yoke  
mm  
Ø6.35  
Ø9.52  
inch  
1/4  
mm  
0~0.5  
0~0.5  
Bar  
Bar  
3/8  
Cone  
Copper pipe  
Clamp handle  
Red arrow mark  
Service Manual  
- 23 -  
Flaring Work and Connection of Piping  
Check  
1. Compare the flare work like the figure on the right.  
Smooth all around  
Inside is shiny without scratches  
2. If a flared section is defective, cut it off and repeat the flar-  
ing process again.  
= Improper flaring =  
Inclined Surface Cracked Uneven  
damaged  
thickness  
Even length  
all around  
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 illustration on the  
right) and pull the tubing and drain hose away from chassis.  
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.  
3. Tape the tubing, drain hose, and the connecting cable. Be  
sure that the drain hose is located on the lowest side of the  
bundle. Locating on the Upper side can cause the conden-  
sation to overflow in the drain pan inside the indoor 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  
Wall Mounted Multi-Zone Split System Air Conditioner  
- 24 -  
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 the indoor unit 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.  
Indoor unit tubing  
Flare nut Pipes  
2. Tighten the flare nut with a torque.  
Outside diameter  
Torque  
Open-end wrench (fixed)  
.
mm  
Ø6.35  
Ø9.52  
inch  
1/4  
kg m  
lbf.in  
156.2  
364.5  
1.8  
4.2  
Flare nut  
3/8  
Wrench  
Connection pipe  
3. Next, extend the indoor unit's drain hose.  
Then attach the drain pipe.  
Indoor unit tubing  
Drain pipe  
Indoor unit drain hose  
Vinyl tape(narrow)  
Wrap the insulation material around the all connections.  
1. Overlap the connection pipe insulation material and the  
indoor unit pipe insulation material. Bind them together  
with vinyl tape so that there is no gap.  
Adhesive  
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)  
3. Bundle the piping and drain hose together by wrapping  
them with vinyl tape, enough to cover where they fit into  
the rear piping housing section.  
Connecting cable  
Pipe  
Vinyl tape(narrow)  
Wrap with vinyl tape  
Pipe  
Vinyl tape(wide)  
Drain hose  
Service Manual  
- 25 -  
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.  
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. between the indoor unit and the instal-  
lation plate to separate the bottom of the indoor unit from  
the wall. (The spacer is used to ease installation and will  
be removed later on per the installation instructions.)  
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  
lbf.in  
156.2  
364.5  
Open-end wrench (fixed)  
1.8  
4.2  
Flare nut  
Wrench  
Connection pipe  
Indoor unit tubing  
3. Next, extend the indoor unit's drain hose.  
Then attach the drain pipe.  
Drain hose  
Indoor unit drain hose  
Vinyl tape (narrow)  
Adhesive  
Wall Mounted Multi-Zone Split System Air Conditioner  
- 26 -  
Flaring Work and Connection of Piping  
Wrap the insulation material around the connecting por-  
tion.  
Plastic bands  
Insulation material  
1. Overlap the connection pipe insulation and the indoor unit  
pipe heat insulation material. Bind them together with vinyl  
tape so that there is 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  
3. Bundle the piping and drain hose together by wrapping  
them with vinyl tape over the range within which they fit  
into the rear piping housing section.  
Pipe  
Drain hose  
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  
- 27 -  
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 slowly downward.  
Bad case  
• Bending the pipe from right to left may cause damage to the tubing.  
Wall Mounted Multi-Zone Split System Air Conditioner  
- 28 -  
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 a long length of  
time.  
Insert the two batteries.(AAA, 1.5V)  
• Be sure that the (+) and (-) directions are correct.  
• Be sure that both batteries are new.  
Re-attach the cover.  
• Slide it back into position.  
Service Manual  
- 29 -  
Flaring Work and Connection of Piping  
Outdoor  
Align the center of the piping and sufficiently tighten the flare  
nut by hand.  
Finally, tighten the flare nut with torque wrench until the  
wrench clicks.  
Outdoor unit  
18/24 kBtu/h  
• When tightening the flare nut with torque wrench, ensure  
the direction for tightening follows the arrow on the wrench.  
Outside diameter  
Torque  
A-UNIT  
Gas side piping  
.
mm  
Ø6.35  
Ø9.52  
inch  
1/4  
kg m  
lbf.in  
156.2  
364.5  
1.8  
4.2  
B-UNIT  
Liquid side piping  
3/8  
Torque wrench  
Outdoor unit  
36 kBtu/h  
A-UNIT  
Gas side piping  
B-UNIT  
Liquid side piping  
C-UNIT  
Torque wrench  
Wall Mounted Multi-Zone Split System Air Conditioner  
- 30 -  
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 ground wire should be longer than the common wires.  
The circuit diagram is 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.  
WARNING:  
• The circuit diagram is subject to change without notice.  
• Be sure to connect wires according to the wiring diagram.  
• Connect the wires firmly, so that they can not be pulled out easily.  
• Connect the wires according to color codes by referring to the wiring diagram.  
WARNING: Provide a circuit breaker  
Main power source  
between power source and the outdoor  
unit as shown below.  
Air  
Circuit Breaker  
Use a circuit breaker  
or time delay fuse.  
Conditioner  
WARNING: The power cord connected to the outdoor unit should comply with the following specifica-  
tions: ETL recognized and CSA certified.  
AWG12 (Allowable temperature  
to the wire rated at least 90C˚)  
18 / 24 kBtu/h  
36 kBtu/h  
AWG14  
Line voltage (208~230V)  
Line voltage (208~230V)  
The power connecting cable connected to the indoor and outdoor unit should comply with the following  
specifications: ETL recognized and CSA certified.  
AWG18  
Low voltage (below 40V)  
WARNING: When using the separate wires as the power cord, please secure the separate wires into  
the control box panel using tie wraps to hold all wires together in place.  
Service Manual  
- 31 -  
Connecting the Cable between Indoor Unit and Outdoor Unit  
Connect the cable to the Outdoor unit.  
1. Remove the control cover from the unit by loosening the  
screw.  
Connect the wires to the terminals on the control board  
individually as the following.  
Outdoor unit  
Terminal block  
Over 5mm  
(0.2inch)  
2. Secure the cable onto the control board with the holder  
(clamper).  
Holder for  
power supply  
cord  
3. Re-attach the control cover to the original position using  
the screws.  
Power supply  
cable  
18 kBtu/h  
Teminal on the Indoor Unit  
Teminal on the Indoor Unit  
B-UNIT  
A-UNIT  
1
1
2
3
4
1
2
3
4
Control cover  
Connecting  
cable  
Connecting cable(Low voltage)  
L1  
L2  
2
3
4
1
2
3
4
Teminal on the Outdoor Unit  
Teminal on the Outdoor Unit  
A Indoor  
B Indoor  
Power Source  
208/230V AC  
(High voltage)  
24 kBtu/h  
Teminal on the Indoor Unit  
Teminal on the Indoor Unit  
B-UNIT  
A-UNIT  
1
1
2
3
4
1
2
3
4
Connecting cable(Low voltage)  
2
3
4
1
2
3
4
L1  
L2  
Teminal on the Outdoor Unit  
Teminal on the Outdoor Unit  
Teminal on the Outdoor Unit  
A Indoor  
B Indoor  
Power Source  
208/230V AC  
(High voltage)  
36 kBtu/h  
Teminal on the Indoor Unit  
Teminal on the Indoor Unit  
Teminal on the Indoor Unit  
B-UNIT  
C-UNIT  
A-UNIT  
1
1
2
3
4
1
2
3
4
1
2
3
4
Connecting cable(Low voltage)  
2
3
4
1
2
3
4
1
2
3
4
L1  
L2  
Teminal on the Outdoor Unit  
Teminal on the Outdoor Unit  
Teminal on the Outdoor Unit  
Teminal on the Outdoor Unit  
A Indoor  
B Indoor  
C Indoor  
Power Source  
208/230V AC  
(High voltage)  
NOTICE  
:
1. Separately wire the high and low voltage lines.  
2. Use heat resistant electrical wiring capable of withstanding temperatures up to 75°C(167°F).  
3.Use outdoor waterproof connection cable rated for at least 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.  
Wall Mounted Multi-Zone Split System Air Conditioner  
- 32 -  
Connecting the Cable between Indoor Unit and Outdoor Unit  
Methods of connecting the cable  
(1) Remove two-caps on the conduit panel.  
(for low voltage line)  
(2) Pull out connection cable through conduit.  
(3) After conduit to the panel, fix nut to the opposite  
side of panel.  
Terminal  
block  
(4) Pass the connection cable through the hole.  
(5) Properly connect the cable on the terminal block.  
Cord clamp  
Cap(Reuse)  
(6) Fix the connection cable with cord clamp provided  
on the unit to reduce strain at the terminal when the  
connection cable is pulled outside up to a 35 pound  
weight  
G
Lock nut  
Hole  
(for low voltage line)  
Cap(Remove)  
Taping  
(for sealing)  
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.  
Power supply line Conduit panel  
Low voltage line  
(connecting cable)  
(1ø, 230/208V)  
High voltage  
When connecting each power wire to the corresponding terminal,  
follow instructions "How to connect wiring to the terminals" and  
fasten the wire tightly using the screw on the terminal plate.  
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  
Service Manual  
- 33 -  
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  
Fuse or breaker  
Model  
Power source  
Capacity  
Air  
18 kBtu/h 1Ø, 230 / 208V  
24 kBtu/h 1Ø, 230 / 208V  
36 kBtu/h 1Ø, 230 / 208V  
20 A  
25 A  
40 A  
Circuit Breaker  
Use a circuit  
breaker or time  
delay fuse.  
Conditioner  
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 goes back into  
place.  
Wall Mounted Multi-Zone Split System Air Conditioner  
- 34 -  
Checking the Drainage, Insulating the Pipe and Special Piping Applications  
Checking the Drainage, Insulating the Pipe and Special Piping Applications  
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. See below for examples of incorrect drain pipe applica-  
tions, which will cause poor condensate flow.  
Accumulated  
Do not raise  
drain water  
Less than  
50mm gap  
Tip of drain hose  
dipped in water  
Air  
Water  
leakage  
Water  
leakage  
Water  
leakage  
Kinking  
Ditch  
Service Manual  
- 35 -  
Checking the Drainage, Insulating the Pipe and Special Piping Applications  
Insulating the Pipe and Special Piping Applications  
Insulate the piping by wrapping the con-  
necting portion of the indoor unit with  
insulation material and secure it with  
two layers of vinyl tape.  
Seal any small  
opening around  
the piping with  
gum type sealant.  
Taping  
Drain hose  
• 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  
Piping  
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  
downward to upward.  
Power supply  
cord  
2. Secure the taped piping along the exterior wall using  
• Trap is required to prevent water from entering  
into electrical parts.  
saddle or equivalent.  
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 any small opening  
around the piping  
with gum type sealant.  
Trap  
3. Secure the piping onto the wall using a saddle or equivalent.  
Trap  
Wall Mounted Multi-Zone Split System Air Conditioner  
- 36 -  
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 leaks, and vacuumed to remove incondensible  
gas and moisture in the system.  
Leak checking  
1. Do a leakage test of all joints of the copper piping(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 copper pipe(both liquid and gas side) between  
the indoor and outdoor units have been properly connected and  
all wiring for the test run has been completed. Remove the ser-  
vice valve caps from both the gas and the liquid side on the out-  
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.  
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 testing shoud be done for each  
indoor unit connection set, separately.  
Nitrogen gas  
cylinder(in vertical  
standing position)  
Service Manual  
- 37 -  
Air Purging and Evacuation  
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.  
Outdoor unit  
Required time for evacuation when 4 CFM vacuum  
pump is used  
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.  
Wall Mounted Multi-Zone Split System Air Conditioner  
- 38 -  
Charging  
Charging  
I Each outdoor unit is factory charged (see rating plate) for the evaporator as well as a 7.5m(25ft) line set for each indoor line.  
Any time the total line set is used either shorter or longer then the nominal line set length the refrigerant charge has to be  
adjusted.  
I Whether the line set is made shorter or longer you must adjust the charge based on how many m(ft) of tubing are either  
added or removed based on 20g(0.22oz) of R-410A per meter(foot).  
Max Elevation  
Max total length  
of all pipes  
(A+B)  
Max elevation  
between indoor  
units (h2)  
Additional  
Refrigerant  
Max length of  
Min length of  
between each indoor  
Capacity (Btu/h)  
each pipe (A/B) each pipe (A/B) unit and outdoor unit  
(h1)  
18k  
24k  
30m(100ft)  
30m(100ft)  
15m(50ft)  
3m(10ft)  
7.5m(25ft)  
7.5m(25ft)  
7.5m(25ft)  
20g/m(0.22oz/ft)  
20g/m(0.22oz/ft)  
15m(50ft)  
3m(10ft)  
7.5m(25ft)  
Max Elevation  
between each indoor  
unit and outdoor unit  
(h1)  
Max total length Max length of  
Min length of  
each pipe  
(A/B/C)  
Max elevation  
between indoor  
units (h2)  
Additional  
Refrigerant  
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, an additional 5 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 charge amount speci-  
fied on the unit's rating plate, adjusting for line sets longer or shorter than 7.5m(25ft) for each indoor unit. Unit is critically  
charged.  
Service Manual  
- 39 -  
Test Running  
Test Running  
Split Type  
1. Check that all copper piping and wiring has been proper-  
Bolt  
ly connected.  
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(14.4°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.  
35°C (95°F) 8.5~9.5kg/cm2G(120~135 P.S.I.G.)  
• Remove the batteries from the remote controller if the sys-  
tem is not going to be used for a long time.  
2) Precautions in test run  
Intake temperature  
I The initial power supply must provide at least 90% of  
the rated voltage.  
Otherwise, the air conditioner should not be operated.  
Discharge air  
I First operate the unit in cooling, even if you are test-  
ing the unit in the winter/heating season.  
Operating the unit in heating first during the test run  
can cause compressor trouble.  
I Carry out the test run more than 5 minutes without  
failure. (Test run will be cancelled 18 minutes later  
automatically)  
Discharge  
temperature  
I The test run is started by pressing timer cancel button  
five times continuously.  
I To cancel the test run, press any button.  
3) Settlement of outdoor unit  
I Anchor the outdoor unit with a bolt and  
nut(ø10mm/0.4inch) tightly and horizontally on a con-  
crete or rigid mount.  
I 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.  
I If the vibration from the unit is being transferred to  
the indoor unit via the connection of the condensation  
hose and/or copper tubing, secure the outdoor unit with  
anti-vibration rubber grommets.  
Wall Mounted Multi-Zone Split System Air Conditioner  
- 40 -  
Operation  
Operation  
Function of control  
1. MAIN UNIT FUNCTION  
• DISPLAY  
Operation Indicator  
• On while in appliance operation, off while in appliance pause  
• Flashing if unit is disconnected or has experienced a short in the thermistor (3 seconds off/0.5 sec on).  
Sleep Timer Indicator  
• On while in sleep time mode, off when sleep timer mode is canceled or appliance operation is paused.  
Timer Indicator  
• On while in timer mode (on/off), off when timer mode is completed or canceled  
Defrost Indicator  
•
Off except when units is in hot start mode (heat pump model only) or while unit is running in defrost control mode.  
I Cooling Mode Operation  
• When the intake air temperature reaches 0.5°C(0.9°F) below the set point temp, the compressor and the out-  
door fan stop.  
• When it reaches 0.5°C(0.9°F) above the set point temp, they start to operate again.  
Compressor ON Temp  
Compressor OFF Temp  
➲ Set point Temp+0.5°C(0.9°F)  
➲ Set point Temp-0.5°C(0.9°F)  
• While the compressor is running, operating with the airflow speed set by the remote control. While compressor  
is off, fan operates at low speed regardless of the set point.  
I Soft Dry Operation Mode  
• When the dehumidification operation input by the remote control is received, the intake air temperature is  
detected and the set point 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 the compressor is 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.  
➲ Set point Temp+0.5°C(0.9°F)  
Compressor OFF Temp. ➲ Set point Temp-0.5°C(0.9°F)  
• In 10-min dehumidification operation, the indoor fan operates with the low airflow speed.  
I Heating Mode Operation  
• When the intake air temp reaches +3°(37.4°F)…above the set point temp, the compressor is turned off. When  
below the set point temp, the compressor is turned on.  
Compressor ON Temp.  
➲ Set point Temp.  
Compressor OFF Temp. ➲ Set point Temp.+3°C(37.4°F)  
• While compressor is 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 at low speed. When the indoor pipe temp is between 20°C(68°F) and 27°C(80.6°F), it  
Service Manual  
- 41 -  
Operation  
operates (except in sleep mode, the airflow will be at medium speed).  
• While compressor is 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 mode, the indoor and outdoor fans are turned off.  
I Defrost Control(Heating)  
• While in defrost mode, the indoor and outdoor fans are turned off.  
• Defrost operation is controlled by timer and sensing temperature of the outdoor pipe.  
• The first defrost cycle starts only when the outdoor pipe temperature falls below -6°C (21.2° F) after 35 min-  
utes has passed from the start of the heating operation and more than 4 minutes since the last of operation of  
the 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 cycle starts only when the outdoor pipe temperature falls below -6°C(21.2°F) after 35 min-  
utes passed from ending the second defrost cycle and more than 4 minutes since the last operation of the  
compressor.  
I Fuzzy Operation  
• When the unit is turned on and an operation mode has not been selected, after 3 hours has passed, the opera-  
tion mode will be automatically selected via fuzzy operation.  
• 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) ≤ Intake Air Temp  
21°C(69.8°F) ≤ Intake Air Temp<24°C(75.2°F)  
Intake Air Temp<21°C(69.8°F)  
➲ Fuzzy Operation for Cooling  
➲ Fuzzy Operation for Dehumidification  
➲ Fuzzy Operation for Heating  
• However, if any of the operation modes among cooling / dehumidification / heating mode operations has been  
carried out for 10 sec or longer before Fuzzy operation, the last mode that the unit operated in will be automati-  
cally selected.  
1) Fuzzy Operation for Cooling  
• According to the set point temperature selected by Fuzzy rule, when the intake air temp is 0.5°C(0.9°F) or more  
below the set point temp, the compressor is turned off. When 0.5°C(0.9°F) or more above the set point temp,  
the compressor is turned on.  
Compressor ON Temp  
Compressor OFF Temp  
➲ Set point Temp +0.5°C(0.9°F)  
➲ Set point Temp + 0.5°C(0.9°F)  
• At the beginning of Fuzzy mode operation, the set point 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(1.8°F)  
➲ Intake Air Temp + 0.5°C(0.9°F)  
➲ Intake Air Temp  
➲ 18°C(64.4°F)  
• When the Fuzzy key (Temperature Control key) is input after the initial set point temperature is selected, the  
Fuzzy key value and the intake air temperature at that time are compared to select the set point 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.  
Wall Mounted Multi-Zone Split System Air Conditioner  
- 42 -  
Operation  
2) Fuzzy Operation for Dehumidification  
• According to the set point temperature selected by Fuzzy rule, when the intake air temp is 0.5°C(0.9°F) or  
more below the set point temp, the compressor is turned off. When 0.5°C(0.9°F) or more above the set point  
temp, the compressor is turned on.  
Compressor ON Temp  
Compressor OFF Temp  
➲ Set point Temp + 0.5°C(0.9°F)  
➲ Set point Temp+0.5°C(0.9°F)  
• At the beginning of Fuzzy mode operation, the set point 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(1.8°F)  
➲ Intake Air Temp+0.5°C(0.9°F)  
➲ Intake Air Temp  
➲ 18°C(64.4°F)  
• When the Fuzzy key (Temperature Control key) is input after the initial set point temperature is selected, the  
Fuzzy key value and the intake air temperature at that time are compared to select the set point temperature  
automatically according to the Fuzzy rule.  
• While in Fuzzy operation, the airflow speed of the indoor fan repeats the low airflow speed or , except in dehu-  
midification mode where the indoor fan may pause.  
3) Fuzzy Operation for Heating  
• According to the set point temperature selected by Fuzzy rule, when the intake air temp is 3°C(37.4°F) or more  
above the set point temp, the compressor is turned off. When below the set point temp, the compressor is  
turned on.  
Compressor ON Temp  
Compressor OFF Temp  
➲ Set point Temp  
➲ Set point Temp + 3°C(5.4°F)  
• At the beginning of Fuzzy mode operation, the set point 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(0.9°F)  
➲ 20°C(68°F)  
• When the Fuzzy key (Temperature Control key) is input after the initial set point temperature is selected, the  
Fuzzy key value and the intake air temperature at that time are compared to select the set point temperature  
automatically according to the Fuzzy rule.  
• While in Fuzzy operation, the airflow speed of the indoor fan is set to the high or medium according to the  
intake air temperature and the set point temperature.  
I 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.  
I 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.  
I 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.  
Service Manual  
- 43 -  
Operation  
• If the appliance is paused at the time set by the timer, the pause continues.  
I 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.  
I 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 paused, the sleep timer mode cannot be input.  
• While in cooling mode, 30 min later the start of the sleep timer, the set point temperature increases by  
1°C(33.8°F). After another 30 min elapse, it increases by 1°C(1.8°F) again.  
• When the sleep timer mode is input while in cooling mode, the airflow speed of the indoor fan is set to the low.  
• When the sleep timer mode is input while in heating mode, the airflow speed of the indoor fan is set to the  
medium.  
I 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.  
I 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.  
I Jet Cool Mode Operation  
• While in heating mode or Fuzzy operation, the Jet Cool key cannot be input. When it is input while in 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 in cooling mode.  
• In the Jet Cool mode operation, the room temperature is controlled to the set point temperature, 18°C(64.4°F)  
• When the sleep timer mode is input while in Jet Cool mode, 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.  
.
I Auto Restarting Operation  
• When the power is restored after a sudden power failure the appliance is in operation, the mode before the  
power failure is kept in the memory. Because of this feature, the appliance automatically operates in the  
mode on the memory.  
Wall Mounted Multi-Zone Split System Air Conditioner  
- 44 -  
Operation  
I Forced Operation  
• To operate the appliance by force (in case the remote control is lost), the forced operation selection switch is  
on the main unit of the appliance and operates it in standard conditions.  
• When the power is supplied while the slide switch is in the forced operation position, or the Auto Restart (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 15 sec and then the operation condi-  
tion is set according to the intake air temperature as follows.  
24°C(43.2°F)≤Intake Air Temp  
21°C(37.8°F)≤Intake Air Temp<24°C(43.2°F)  
Intake Air Temp<21°C(37.8°F)  
➲ Cooling Mode Operation, 22°C(39.6°F), High Speed  
➲ Dehumidification Operation, 23°C(41.4°F), High Speed  
➲ Heating Mode Operation, 24°C(43.2°F), High Speed  
I Buzzer Sound  
• 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.  
Service Manual  
- 45 -  
Operation  
Function of Indoor Unit  
Split 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 set point 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  
Soft Dry Operation Mode  
• Intermittent operation of fan at low speed.  
De-Ice or Defrost Control (Heating)  
Sleep Mode Auto Control  
• Both the indoor and outdoor fans  
stop during de-icing.  
• Hot start after de-Ice ends.  
• The fan is switched to low(Cooling), med(Heating) speed.  
•
The unit will be stopped after user selected1, 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  
reaches 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.  
Wall Mounted Multi-Zone Split System Air Conditioner  
- 46 -  
Operation  
Function of Outdoor Unit  
Outdoor Unit  
Operating Step  
• Compressor step varies considering conditions such as room temperature, operating room number,  
temperature gap between room temperature and set point temperature and so on.  
LEV Control  
• The linear expansion valve is pulse is modulated to keep constant superheat or subcooling.  
Outdoor Fan Control  
• Outdoor fan operates at High or Off to respond to the load condition.  
R/Valve Control(Heating Model Only)  
• Reversing valves is used to change cooling to heating, heating to cooling.  
Defrost Function  
• After 45 minutes in heating mode, defrost mode will take effect if the outdoor pipe temp is below 5°C  
(23°F). The defrost mode will end when the outdoor pipe temp is above 12°C (53.6°F) or after the unit  
has been operated in cooling mode for 9 minutes.  
• To de-ice the outdoor heat exchanger in low temperature conditions, the unit will defrost by changing  
the operating mode from heating to cooling, while turning off both indoor and outdoor fans.  
Oil Return System  
• In single(one) compressor operation duration, another compressor will operate for 30 seconds every 1  
hours.  
compressor Overload Protection  
• To protect compressor from being overloaded, the compressor overload protector will turn the  
compressor off.  
High Pressure Protction  
• If the refrigerant cycle's pressure is too high, above 36.7 kgf/cm2 (521.997psi), the high pressure  
switch will turn the compressor off.  
Service Manual  
- 47 -  
Operation  
Remote Control Operation  
The Remote Controller transmits the signals to the system.  
1. START/STOP BUTTON  
Operation starts when this button is  
pressed and stops when the button is pressed again.  
Signal transmitter  
2. OPERATION MODE SELECTION BUTTON  
(Cooling Only)  
(Heat Pump)  
Used to select the operation mode.  
3. ROOM TEMPERATURE SETTING BUTTONS  
Used to select the room temperature.  
4. INDOOR FAN SPEED SELECTOR  
Used to select fan speed in four steps  
low, medium, high and CHAOS.  
5
6
1
3
5. JET COOL  
Used to start or stop the speed cooling/heating.  
(speed cooling/heating operates super high fan speed.)  
6. CHAOS SWING BUTTON  
4
Used to stop or start louver movement  
and set the desired up/down airflow direction.  
10  
2
7
CANCEL  
9
SET  
ON  
OFF  
7. ON/OFF TIMER BUTTONS  
AUTO CLEAN  
12  
11  
8
Used to set the time of starting and stopping operation.  
15  
16  
8. TIME SETTING BUTTONS  
Used to adjust the time.  
14  
13  
9. TIMER SET/CANCEL BUTTON  
Used to set the timer when the desired time is obtained  
and to cancel the Timer operation.  
10. SLEEP MODE AUTO BUTTON  
Flip-up door  
(opened)  
Used to set Sleep Mode Auto operation.  
11. AIR CIRCULATION BUTTON  
Operation Mode  
Used to circulate the room air without cooling or heating.  
12. ROOM TEMPERATURE CHECKING BUTTON  
Cooling Operation  
Used to check the room temperature.  
13. RESET BUTTON  
Auto Operation or Auto Changeover  
Healthy Dehumidification Operation  
Used prior to resetting time.  
14. 2nd F Button  
Used prior to using modes printed in blue at the bottom of  
buttons.  
Heating Operation  
15. AUTO CLEAN  
•
Cooling Model( ), Heat Pump Model(  
)
Used to set Auto Clean mode.  
16. ˚C TO ˚F SWITCHING BUTTON  
Used to switch temperature reading from Centigrade to  
Fahrenheit.  
Wall Mounted Multi-Zone Split System Air Conditioner  
- 48 -  
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.  
Ground  
Conductor  
Service Manual  
- 49 -  
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 Evaporator Holder, at the right  
1EA).  
• Repairing the unit, do not damage the Caution  
label.  
Wall Mounted Multi-Zone Split System Air Conditioner  
- 50 -  
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 screws.  
• 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 -  
Disassembly  
Schematic Diagram  
Electronic Control Device  
1. Indoor Unit  
1) Split Type  
Wall Mounted Multi-Zone Split System Air Conditioner  
- 52 -  
Schematic Diagram  
2. Outdoor Unit  
Service Manual  
- 53 -  
Schematic Diagram  
5 6 1 * 2  
1 u F  
1 u F  
1 M  
4 7 2 * 3  
1 u F  
2 2 2 * 2  
Wall Mounted Multi-Zone Split System Air Conditioner  
- 54 -  
Schematic Diagram  
Wiring Diagram  
1. Indoor Unit  
2. Outdoor Unit  
1)A-MMC18FA-1  
2)A-MMH18FA-1  
Service Manual  
- 55 -  
Schematic Diagram  
3) A-MMC24FA-1  
4) A-MMH24FA-1  
5) A-MMC36FA-1  
6) A-MMH36FA-1  
Wall Mounted Multi-Zone Split System Air Conditioner  
- 56 -  
Schematic Diagram  
Component Locations  
1. Indoor Unit  
MAIN P.C.B. ASSEMBLY  
1) Split Type  
• TOP VIEW  
PCB :6870A90409B  
ASSY:6871A20771  
6871A20782  
• BOTTOM VIEW  
Service Manual  
- 57 -  
Schematic Diagram  
2. Display ASSEMBLY  
1) Split Type (6871A20680)  
Wall Mounted Multi-Zone Split System Air Conditioner  
- 58 -  
Schematic Diagram  
3. Outdoor Unit  
1) Component side  
Service Manual  
- 59 -  
Schematic Diagram  
2) Solder side  
Wall Mounted Multi-Zone Split System Air Conditioner  
- 60 -  
Troubleshooting Guide  
Troubleshooting Guide  
Refrigeration Cycle Diagram  
1. A-MMC18FA-1  
OUTDOOR UNIT  
High pressure S/W  
Ø9.52  
Room B  
Field Piping  
Gas  
Ø9.52  
Room A  
Header  
Th3  
Th1  
Th2  
Heat  
Exchanger  
EEV-B  
EEV-A  
Ø6.35  
Room B  
Ø6.35  
Room A  
Field Piping  
Liquid  
Refrigerant Flow  
Cooling  
Strainer  
Th1: Discharge thermistor  
Th2: Discharge thermistor  
Th3: Outdoor temperature thermistor  
2. A-MMH18FA-1  
OUTDOOR UNIT  
Ø9.52  
Room B  
Field Piping  
Gas  
Ø9.52  
Room A  
High pressure S/W  
Header  
Th3  
Th1  
Th2  
Heat  
Exchanger  
EEV-B  
EEV-A  
Ø6.35  
Room B  
Ø6.35  
Room A  
Field Piping  
Liquid  
Th4  
Refrigerant Flow  
Cooling  
Strainer  
Heating  
Th1: Discharge thermistor  
Th2: Discharge thermistor  
Th3: Outdoor temperature thermistor  
Th4: Defrost thermistor  
Service Manual  
- 61 -  
Troubleshooting Guide  
3. A-MMC24FA-1  
OUTDOOR UNIT  
High pressure S/W  
Ø9.52  
Room B  
Ø9.52  
Room A  
Field Piping  
Gas  
Strainer  
Header  
Th3  
Th1  
Th2  
Heat  
Exchanger  
EEV-B  
EEV-A  
Ø6.35  
Room B  
Ø6.35  
Room A  
Field Piping  
Liquid  
Refrigerant Flow  
Cooling  
Strainer  
Th1: Discharge thermistor  
Th2: Discharge thermistor  
Th3: Outdoor temperature thermistor  
4. A-MMH24FA-1  
OUTDOOR UNIT  
Ø9.52  
Room B  
Field Piping  
Gas  
Ø9.52  
Room A  
Strainer  
High pressure S/W  
Header  
Th3  
Th1  
Th2  
Heat  
Exchanger  
EEV-B  
EEV-A  
Ø6.35  
Room B  
Ø6.35  
Room A  
Field Piping  
Liquid  
Th4  
Refrigerant Flow  
Cooling  
Strainer  
Heating  
Th1: Discharge thermistor  
Th2: Discharge thermistor  
Th3: Outdoor temperature thermistor  
Th4: Defrost thermistor  
Wall Mounted Multi-Zone Split System Air Conditioner  
- 62 -  
Troubleshooting Guide  
OUTDOOR UNIT  
5. A-MMC36FA-1  
Ø9.52  
Room C  
High pressure S/W  
Ø9.52  
Room B  
Ø9.52  
Room A  
Field Piping  
Gas  
Header  
Th3  
Th1  
Th2  
Heat  
Exchanger  
EEV-C  
EEV-B  
Ø6.35  
Room C  
Ø6.35  
Room B  
Ø6.35  
Room A  
Field Piping  
Liquid  
EEV-A  
Refrigerant Flow  
Cooling  
Th1: Discharge thermistor  
Th2: Discharge thermistor  
Th3: Outdoor temperature thermistor  
OUTDOOR UNIT  
6. A-MMH36FA-1  
Ø9.52  
Room C  
Ø9.52  
Room B  
Field Piping  
Gas  
Ø9.52  
Room A  
High pressure S/W  
Header  
Th3  
Th1  
Th2  
Heat  
Exchanger  
EEV-C  
Ø6.35  
Room C  
EEV-B  
EEV-A  
Ø6.35  
Room B  
Ø6.35  
Room A  
Field Piping  
Liquid  
Th4  
Refrigerant Flow  
Cooling  
Heating  
Th1: Discharge thermistor  
Th2: Discharge thermistor  
Th3: Outdoor temperature thermistor  
Th4: Defrost thermistor  
Service Manual  
- 63 -  
Troubleshooting Guide  
Self-diagnosis Function  
I Error Indicator  
• The self-diagnosis function of the air conditioner is used to identify any troubles that may exist.  
• Refer to the table below to determine the error code associated with the LED signals given by the indoor air con-  
ditioner's display.  
• If more than two problems occur simultaneously, one error code of most severity is displayed.  
• After an error has occurred, if the error is fixed/cleared, the LED display representing the error code (shown in  
the table below) will also be cleared simultaneously.  
• To operate the unit after the occurrence of an error code, it is best to power off the unit and then power on again.  
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)  
Wall Mounted Multi-Zone Split System Air Conditioner  
- 64 -  
Troubleshooting Guide  
Cycle Troubleshooting Guide  
Trouble analysis  
1. Check temperature difference between intake and discharge air, as well as the operating current.  
Temp. difference  
Current  
: approx. 0°C(0°F)  
: less than 80% of  
rated current  
All of the refrigerant many have  
leaked out.  
Restriction in the refrigeration cycle.  
Temp. Difference  
Operating Current  
Temp. difference  
Current  
: approx. 8°C(14.4°F)  
: less than 80% of  
rated current  
Refrigerant leakage  
Clog of refrigeration cycle  
Defective compressor  
Temp. difference  
Current  
: less than 8°C(14.4°F)  
: near the rated cur-  
rent  
Excessive amount of refrigerant  
Temp. difference : over 8°C(14.4°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  
or Refrigerant Cycle Restrictions.  
Current is low.  
Higher  
Notice:  
2
1. The suction pressure is usually 4.5~6.0 kg/cm(64.0~85.34psi) at normal condition.  
2. The temperature can be measured by attaching the thermometer to the low pressure tubing and wrapping it  
with putty.  
Service Manual  
- 65 -  
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.  
Is "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.C.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↑  
Wall Mounted Multi-Zone Split System Air Conditioner  
- 66 -  
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  
due to the designed 3 minute delay, which is a protective function anytime the compres-  
sor is stopped.  
When the compressor is stopped, the Indoor Fan is driven by a low speed.  
At this point the fan speed is not controlled by the remote controller.  
(When operated in the Sleeping Mode, the fan speed is set to the low speed as designed.)  
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(L / M) and wind  
speed selecting.  
Check DISP PCB Ass'y  
-Voltage between CN1 ➀ - ➆ : DC +5V  
Check the Display PCB Ass'y  
• Check receiver ass'y  
Service Manual  
- 67 -  
Troubleshooting Guide  
The Compressor/Outdoor Fan don't operate  
Trouble 3  
Turn on the main power.  
Operate Cooling Mode by setting the disired temperature of the remote controller to less  
than one of the Indoor temperature by 1°C(33.8°F) at least.  
When in air circulation mode, compressor/outdoor fan is stopped.  
Check that the sensor for Indoor temperature is attatched and as close as to the Heat  
Exchanger (Evaporator.)  
When the sensor circuit for Indoor temperature and connector have a 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 that the Indoor temperature sensor is disconnected (about 10K at 25°C(77°F)).  
Check the Relay(RY-PWR, RY-START) for driving Compressor.  
• Check the voltage between brown and blue cable of terminal which connects to the Outdoor unit  
(About AC208V / 230V).  
• Check the Outdoor PCB Assembly's relay circuit.  
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.  
Wall Mounted Multi-Zone Split System Air Conditioner  
- 68 -  
Troubleshooting Guide  
When indoor Fan does not operate.  
When indoor Fan does not operate.  
Trouble 4  
Does the voltage of each terminals of CN-MOTOR CONNECTOR in  
Indoor unit corresponds to values in the Table of page 70  
Does the voltage of terminal of CN-DC/DC CONNECTOR in Indoor  
Check connection condition of the CN-MOTOR CON-  
unit that corresponds to the values in the table of page 70  
NECTOR  
Does the voltage of terminal of  
Check the pattern and the  
CN-DC/DC CONNECTOR in  
condition of Indoor unit PCB  
Outdoor unit corresponds to the  
Ass'y.  
Check for any interference of Indoor Fan.  
values in the table of page 70  
NO  
Check the motor of Indoor Fan  
Check the condition of con-  
necting wires between Indoor  
and Outdoor unit.  
Check the patterns and the  
conditions of outdoor unit PCB  
Assy's.  
Indoor Fan may be off in the Soft Dry Mode(change to the Cooling Operation Mode).  
Indoor Fan is off when Indoor pipe(coil) termperature is lower than 79°F.  
(At that time, the defrost indicator is turn on.)  
Service Manual  
- 69 -  
Troubleshooting Guide  
Voltage of Connectors according to Indoor Fan Speed  
Input Power  
INDOOR  
FAN  
MOTOR  
INDOOR PWB ASSY  
1
4
4
3
3
TAB-N  
RY-COMP-A  
RY-COMP-B  
Connecting wires  
between Indoor  
and Outdoor  
CN-DC/DC  
1 2 3 4  
Indoor  
Connecting Terminal  
Outdoor  
Connecting Terminal  
CN-COM  
BL BK BR RD  
BL  
1
2
3
4
BK  
BR  
RD  
No. of pins  
DC Voltage( 10%)  
+
4
-
S-Hi  
Hi  
Med  
Low  
Off  
0
3
35.5  
32.96  
11.97  
25.17  
17.28  
11.97  
INDOOR  
CN-  
MOTOR  
2
3
11.97  
11.97  
11.97  
4
3
2
2
35.5  
32.96  
15.87  
25.17  
15.87  
17.28  
15.87  
0
INDOOR  
CN-  
DC/DC  
15.87  
15.87  
4
3
2
2
35.5  
32.96  
15.87  
25.17  
15.87  
17.28  
15.87  
0
OUTDOO  
R CN-  
COM  
15.87  
15.87  
Wall Mounted Multi-Zone Split System Air Conditioner  
- 70 -  
Troubleshooting Guide  
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 connection condition of CN-UP/DOWN Connector  
• Check the soldering condition(on PCB) 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 if the assembly parts are catching and interfering in the rotation of  
the Vertical Louver  
Service Manual  
- 71 -  
Troubleshooting Guide  
Error Code  
I Trouble Shooting  
Error  
code  
Description  
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)  
01  
Indoor 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)  
02  
06  
Indoor inlet pipe sensor  
Indoor outlet pipe 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)  
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(77°F), 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 onto the 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(77°F), then sensor is normal.  
8. If the resistance of the sensor is 0 or 5Vdc, then sensor is abnormal. ➔ Repair or Change the PCB  
Wall Mounted Multi-Zone Split System Air Conditioner  
- 72 -  
Troubleshooting Guide  
Error  
code  
Description  
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  
• Poor Communication  
❑ Check Point  
1. Check the input power AC 230V.(Outdoor, Indoor)  
2. Check that the communication wires are correctly connected.  
➔ Adjust the connection of wire  
➔ Confirm the "Live", "Neutral“ wires.  
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 operating normally, outdoor PCB has no problem.  
➔ Check the other indoor unit.  
* CH05 is displayed at indoor unit, CH53 is displayed at outdoor unit.  
Service Manual  
- 73 -  
Troubleshooting Guide  
Error  
code  
Description  
Cause of error  
Check point & Normal condition  
• Check the discharge pipe sensor.  
• Check the install condition for over load.  
• Check for leakage of refrigerent.  
• Discharge sensor  
temp. high  
33  
D-Pipe Temp. High  
• Check is the Service Valve (SVC V/V) is open.  
COMP OFF  
115°C(239°F)  
LEV OPEN(16PULSE/MIN)  
100°C(212°F)  
95°C(203°F)  
LEV OPEN(10PULSE/MIN)  
NORMAL  
❑ Check Point  
1. Check the install condition for over load.  
2. Check is the Service Valve (SVC V/V) is open.  
3. Check for leakage of refrigerent.  
4. Check the constant compressor.  
Error  
code  
Description  
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.  
➔ single cycle has no error for over capacity.  
Wall Mounted Multi-Zone Split System Air Conditioner  
- 74 -  
Troubleshooting Guide  
Error  
code  
Description  
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 -  
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  
Control Mechanism  
Factory Setting  
Shaft position  
Shaft position  
Service port  
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  
(with valve cap)  
Open  
(with valve cap)  
Closed  
(with cap)  
Pumping down  
(Transfering)  
Closed  
(clockwise)  
Open  
(counter-clockwise)  
Open  
(connected  
manifold gauge)  
Evacuation  
(Servicing)  
Open  
Open  
Open  
Open  
Open  
Open  
Open  
Open  
Open  
(with charging  
cylinder)  
3.  
4.  
Gas charging  
(Servicing)  
Open  
(with charging  
cylinder)  
Pressure check  
(Servicing)  
Open  
(with charging  
cylinder)  
5.  
6.  
Gas releasing  
(Servicing)  
Open  
(with charging  
cylinder)  
Wall Mounted Multi-Zone Split System Air Conditioner  
- 76 -  
2-way, 3-way Valve  
(1) Pumping down  
Liquid side  
Indoor unit  
Outdoor unit  
Close  
Open  
2-Way  
valve  
Gas side  
3-Way  
valve  
Liquid side  
Indoor unit  
Close  
Open  
2-Way  
valve  
Gas side  
3-Way  
valve  
manifold gauge  
Low-  
handle  
(CLOSE)  
Hi- handle  
(CLOSE)  
7. Immediately set the gas side valve to the closed position.  
• Procedure  
1. Confirm that both the gas side and liquid side  
valves are set to the open position.  
- Do this quickly so that the gauge ends up indicat-  
ing 1kg/  
(14.22psi).  
8. Disconnect the charge set, and replace the liquid side  
and gas side valve caps and the service port nut.  
- Use torque wrench to tighten the service port nut to  
a torque as indicated below.  
- Remove the valve stem caps and confirm that the  
valve stems are in the raised position.  
- Be sure to use a hexagonal wrench to operate  
the valve stems.  
2. Operate the unit for 10 to 15 minutes.  
3. Stop operation and wait for 3 minutes, then connect the  
manifold gauge to the service port of the gas side valve.  
- Connect the hose of the gauge with the push pin  
to the service port.  
Outside diameter  
Turque  
.
.
mm  
inch  
1/4  
3/8  
1/2  
kg m  
lbf in  
Ø6.35  
Ø9.52  
Ø12.7  
1.8  
4.2  
5.5  
156.2  
364.5  
477.4  
4. Air purging of the charge hose.  
- Be sure to check for gas leakage.  
- 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.  
6. Operate the air conditioner at the cooling cycle and  
2
stop it when the gauge indicates 1kgf/cm (14.22psi).  
•
Be sure not to short the pressure switch S/W, otherwise if the low pressure switch S/W detects low pressure it will stop the compressor.  
Service Manual  
- 77 -  
2-way, 3-way Valve  
(2) Evacuation  
(All the refrigerant leaked)  
Liquid side  
Indoor unit  
Outdoor unit  
Open  
Open  
2-Way  
valve  
Gas side  
3-Way  
valve  
Liquid side  
Indoor unit  
Open  
Open  
2-Way  
valve  
Gas side  
3-Way  
valve  
manifold gauge  
Vacuum pump  
Low-  
handle  
(OPEN)  
Hi- handle  
(OPEN)  
• Procedure  
6. Disconnect the charge hose from the vacuum  
pump.  
- If the vacuum pump oil becomes dirty or deplet-  
ed, replenish as needed.  
7. Replace the valve and service port caps.  
1. Confirm that both the liguid side valve and gas  
side valve are set to the opened position.  
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.  
4. Evacuate 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).  
Wall Mounted Multi-Zone Split System Air Conditioner  
- 78 -  
2-way, 3-way Valve  
(3) Gas Charging  
(After Evacuation)  
Liquid side  
Indoor unit  
Outdoor unit  
Open  
Open  
2-Way  
valve  
Gas side  
3-Way  
valve  
Liquid side  
Indoor unit  
Open  
Open  
2-Way  
valve  
Gas side  
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 discon-  
nected from the vacuum pump, to the valve at  
the bottom of the cylinder.  
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.  
-
-
Stopping part way will allow the gas to be discharged.  
If the system has been charged with liquid refrig-  
erant while operating the air conditioner turn off  
the air conditioner before disconnecting the hose.  
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.  
The procedure is the same if using a gas cylinder.  
5. Replace the valve stem nuts and the service port nut.  
- Use torque wrench to tighten the service port  
nut to a torque as indicated below.  
3. Open the low handle on the gauge and charge  
the system with liquid refrigerant.  
-
If the system can not be charged with the specified  
amount of refrigerant, it can be charged with a little at a  
time (approximately 150g(5.29oz) each time) while oper-  
ating the air conditioner in the cooling cycle; however,  
one time is not sufficient, wait approximately 1 minute  
and then repeat the procedure(pumping down-pin).  
Outside diameter  
Turque  
.
.
mm  
inch  
1/4  
3/8  
1/2  
kg m  
lbf in  
Ø6.35  
Ø9.52  
Ø12.7  
1.8  
4.2  
5.5  
156.2  
364.5  
477.4  
- Be sure to check for gas leakage.  
4. Immediately disconnect the charge hose from  
the gas side valve's service port.  
Service Manual  
- 79 -  
Exploded View  
Exploded View  
Indoor Unit  
Model : B-MMC09FA-1, B-MMH09FA-1, B-MMC12FA-1, B-MMH12FA-1  
135312  
152302A  
152302B  
135301  
152313  
131410  
733010  
342800  
354210  
359011  
135311  
135500  
147581  
346810  
567480A  
268711A  
135516  
35211B  
567480B  
352150  
147582  
146811  
268711B  
268711C  
267110  
249951  
Wall Mounted Multi-Zone Split System Air Conditioner  
- 80 -  
Exploded View  
Outdoor Unit  
Model : A-MMC18FA-1, A-MMH18FA-1  
Service Manual  
- 81 -  
Exploded View  
Model : A-MMC24FA-1, A-MMH24FA-1  
Wall Mounted Multi-Zone Split System Air Conditioner  
- 82 -  
Exploded View  
Model : A-MMC36FA-1, A-MMH36FA-1  
Service Manual  
- 83 -  
Specifications and performance data subject to change without notice.  
HEAT CONTROLLER, INC.  
1900 WELLWORTH AVENUE • JACKSON, MICHIGAN 49203  
THE QUALITY LEADER IN CONDITIONING AIR  
P/No.:3828A20390X  
08/06/2008  

Brother MFC 6490CW User Manual
Brother MFC 8840DN User Manual
Carrier COMFORT 50VLA User Manual
Cognitive Solutions All in One Printer B780 User Manual
Cornelius Visual Display Dispenser EJ1 User Manual
Epson Stylus CX8400 User Manual
Extron electronic Extron Electronics Battery Charger 200 User Manual
Friedrich MW18Y3E User Manual
Heat Controller Inc Air Conditioner DMH12SB 0 User Manual
Hotpoint Air Conditioner HP21WR User Manual