Panasonic Air Conditioner CS S12NKUW 1 User Manual
Order No: PHAAM1111084C1  
Indoor Unit  
CS-S9NKUW-1  
CS-S12NKUW-1  
CS-S18NKU-1  
CS-S22NKU-1  
Outdoor Unit  
CU-S9NKU-1  
CU-S12NKU-1  
CU-S18NKU-1  
CU-S22NKU-1  
Please file and use this manual together with the service manual for Model No. CU-2S18NBU, Order No. PHAAM1111121C1.  
WARNING  
This service information is designed for experienced repair technicians only and is not designed for use by the general public.  
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.  
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to  
service or repair the products dealt with in this service information by anyone else could result in serious injury or death.  
PRECAUTION OF LOW TEMPERATURE  
In order to avoid frostbite, be assured of no refrigerant leakage during the installation or repairing of refrigerant circuit.  
© Panasonic HA Air-Conditioning (M) Sdn. Bhd. 2011.  
Unauthorized copying and distribution is a violation of law.  
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1. Safety Precautions  
•
•
Read the following “SAFETY PRECAUTIONS” carefully before perform any servicing.  
Electrical work must be installed or serviced by a licensed electrician. Be sure to use the correct rating of the power plug and  
main circuit for the model installed.  
•
The caution items stated here must be followed because these important contents are related to safety. The meaning of each  
indication used is as below. Incorrect installation or servicing due to ignoring of the instruction will cause harm or damage,  
and the seriousness is classified by the following indications.  
This indication shows the possibility of causing death or serious injury.  
WARNING  
This indication shows the possibility of causing injury or damage to properties.  
CAUTION  
•
•
The items to be followed are classified by the symbols:  
This symbol denotes item that is PROHIBITED from doing.  
Carry out test run to confirm that no abnormality occurs after the servicing. Then, explain to user the operation, care and  
maintenance as stated in instructions. Please remind the customer to keep the operating instructions for future reference.  
WARNING  
1. Do not modify the machine, part, material during repairing service.  
2. If wiring unit is supplied as repairing part, do not repair or connect the wire even only partial wire break. Exchange the whole wiring unit.  
3. Do not wrench the fasten terminal. Pull it out or insert it straightly.  
Engage authorized dealer or specialist for installation and servicing. If installation of servicing done by the user is defective, it will cause  
water leakage, electrical shock or fire.  
4.  
5. Install according to this installation instructions strictly. If installation is defective, it will cause water leakage, electric shock or fire.  
Use the attached accessories parts and specified parts for installation and servicing. Otherwise, it will cause the set to fall, water leakage,  
fire or electrical shock.  
6.  
Install at a strong and firm location which is able to withstand the set’s weight. If the strength is not enough or installation is not properly  
done, the set will drop and cause injury.  
7.  
For electrical work, follow the local national wiring standard, regulation and the installation instruction. An independent circuit and single  
outlet must be used. If electrical circuit capacity is not enough or defect found in electrical work, it will cause electrical shock or fire.  
8.  
This equipment is strongly recommended to be installed with Earth Leakage Circuit Breaker (ELCB) or Residual Current Device (RCD).  
Otherwise, it may cause electrical shock and fire in case equipment breakdown or insulation breakdown.  
9.  
Do not use joint cable for indoor/outdoor connection cable. Use the specified indoor/outdoor connection cable, refer to installation  
10. instruction CONNECT THE CABLE TO THE INDOOR UNIT and connect tightly for indoor/outdoor connection. Clamp the cable so that no  
external force will be acted on the terminal. If connecting or fixing is not perfect, it will cause heat up or fire at the connection.  
Wire routing must be properly arranged so that control board cover is fixed properly. If control board cover is not fixed perfectly, it will  
cause heat-up or fire at the connection point of terminal, fire or electrical shock.  
11.  
When install or relocate air conditioner, do not let any substance other than the specified refrigerant, eg. air etc. mix into refrigeration cycle  
(piping). (Mixing of air etc. will cause abnormal high pressure in refrigeration cycle and result in explosion, injury etc.).  
12.  
Do not install outdoor unit near handrail of veranda. When installing air-conditioner unit at veranda of high rise building, child may climb up  
to outdoor unit and cross over the handrail and causing accident.  
13.  
This equipment must be properly earthed. Earth line must not be connected to gas pipe, water pipe, earth of lightning rod and  
telephone. Otherwise, it may cause electrical shock in case equipment breakdown or insulation breakdown.  
14.  
15. Keep away from small children, the thin film may cling to nose and mouth and prevent breathing.  
Do not use unspecified cord, modified cord, joint cord or extension cord for power supply cord. Do not share the single outlet with  
other electrical appliances. Poor contact, poor insulation or over current will cause electrical shock or fire.  
16.  
Tighten the flare nut with torque wrench according to specified method. If the flare nut is over-tightened, after a long period, the flare may  
break and cause refrigerant gas leakage.  
17.  
For R410A models, when connecting the piping, do not use any existing (R22) pipes and flares nuts. Using such same may cause  
abnormally high pressure in the refrigeration cycle (piping), and possibly result in explosion and injury. In case of using existing  
(R22) pipes during installation of R410A models, must carry out pump down properly to collect back the refrigerant and oil before  
installation new unit.  
18.  
Thickness of copper pipes used with R410A must be more than 0.6mm. Never use copper pipes thinner than 0.6mm.  
It is desirable that the amount of residual oil is less than 40 mg/10m.  
3
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WARNING  
During installation, install the refrigerant piping properly before run the compressor. (Operation of compressor without fixing refrigeration  
19. piping and valves at opened condition will cause suck-in of air, abnormal high pressure in refrigeration cycle and result in explosion, injury  
etc.).  
During pump down operation, stop the compressor before remove the refrigeration piping. (Removal of refrigeration piping while  
20. compressor is operating and valves are opened condition will cause suck-in of air, abnormal high pressure in refrigeration cycle and result  
in explosion, injury etc.)..  
After completion of installation or service, confirm there is no leakage of refrigerant gas. It may generate toxic gas when the refrigerant  
contacts with fire.  
21.  
22. Ventilate if there is refrigerant gas leakage during operation. It may cause toxic gas when the refrigerant contacts with fire.  
23. Do not insert your fingers or other objects into the unit, high speed rotating fan may cause injury  
24. Must not use other parts except original parts describe in catalog and manual.  
25. Using of refrigerant other than the specified type may cause product damage, burst and injury etc.  
CAUTION  
Do not install the unit at place where leakage of flammable gas may occur. In case gas leaks and accumulates at surrounding of  
the unit, it may cause fire.  
1.  
Carry out drainage piping as mentioned in installation instructions. If drainage is not perfect, water may enter the room and damage the  
furniture.  
2.  
Tighten the flare nut with torque wrench according to specified method. If the flare nut is over-tightened, after a long period, the flare may  
break and cause refrigerant gas leakage.  
3.  
4. Do not touch outdoor unit air inlet and aluminium fin. It may cause injury.  
5. Select an installation location which is easy for maintenance.  
Pb free solder has a higher melting point than standard solder; typically the melting point is 50°F – 70°F (30°C – 40°C) higher. Please use  
6. a high temperature solder iron. In case of the soldering iron with temperature control, please set it to 700 ± 20°F (370 ± 10°C).  
Pb free solder will tend to splash when heated too high (about 1100°F / 600°C).  
Power supply connection to the air conditioner. Connect the power supply cord of the air conditioner to the mains using one of the  
following methods.  
Power supply point shall be the place where there is ease for access for the power disconnection in case of emergency. In some  
countries, permanent connection of this room air conditioner to the power supply is prohibited.  
7. i. Power supply connection to the receptacle using a power plug.  
Use an approved 15/16A (1.0 ~ 1.75HP) or 16A (2.0HP) or 20A (2.5HP), power plug with earth pin for the connection to the socket.  
ii. Power supply connection to a circuit breaker for the permanent connection.  
Use an approved 16A (1.0 ~ 2.0HP) or 20A (2.5HP), circuit breaker for the permanent connection. It must be a double pole switch with  
a minimum 3.0 mm contact gap.  
Do not release refrigerant during piping work for installation, servicing, reinstallation and during repairing a refrigerant parts. Take  
care of the liquid refrigerant, it may cause frostbite.  
8.  
9. Installation or servicing work: It may need two people to carry out the installation or servicing work.  
10. Do not install this appliance in a laundry room or other location where water may drip from the ceiling, etc.  
11. Do not sit or step on the unit, you may fall down accidentally.  
12. Do not touch the sharp aluminum fins , sharp parts may cause injury.  
4
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2. Specification  
Indoor  
CS-S9NKUW-1  
CU-S9NKU-1  
ARI  
CS-S12NKUW-1  
CU-S12NKU-1  
ARI  
Model  
Outdoor  
Performance Test Condition  
Phase, Hz  
Single, 60  
Single, 60  
Power Supply  
V
208  
Mid.  
2.49  
230  
Mid.  
2.49  
208  
Mid.  
3.48  
230  
Mid.  
3.48  
Min.  
1.20  
Max.  
3.00  
Min.  
1.20  
Max.  
3.00  
Min.  
1.20  
Max.  
3.85  
Min.  
1.20  
Max.  
3.85  
kW  
Capacity  
BTU/h  
4100 8500 10200 4100 8500 10200 4100 11900 13100 4100 11900 13100  
Running Current  
Input Power  
A
-
3.7  
700  
3.56  
-
-
3.3  
700  
3.56  
-
-
5.1  
1.00k 1.15k  
3.48 3.35  
-
-
4.6  
1.00k 1.15k  
3.48 3.35  
-
W
W/W  
250  
4.80  
900  
3.33  
250  
4.80  
900  
3.33  
250  
4.80  
250  
4.80  
EER  
Btu/hW  
%
16.40 12.10 11.30 16.40 12.10 11.30 16.40 11.90 11.35 16.40 11.90 11.35  
Power Factor  
-
91  
40 / 25 / 20  
56 / -  
-
-
92  
40 / 25 / 20  
56 / -  
-
-
94  
43 / 28 / 20  
59 / -  
-
-
95  
43 / 28 / 20  
59 / -  
-
dB-A  
Indoor Noise (H / L / QLo)  
Power Level dB  
dB-A  
45 / - / -  
60 / -  
47 / - / -  
62 / -  
46 / - / -  
61 / -  
48 / - / -  
63 / -  
Outdoor Noise (H / L / QLo)  
Power Level dB  
Max Current (A) / Max Input Power (W)  
Starting Current (A)  
4.1 / 900  
3.7  
5.4 / 1.22k  
5.1  
Min Circuit Ampacity  
Max. Overcurrent Protection  
Type  
15.0  
15.0  
15.0  
15.0  
Hermetic Motor (Rotary)  
Hermetic Motor (Rotary)  
Brushless (6 poles)  
700  
Compressor  
Motor Type  
Brushless (6 poles)  
700  
Output Power  
W
Type  
Cross-flow fan  
ASG20K1  
Transistor (8 poles)  
47.0 - 47.0  
30  
Cross-flow fan  
ASG20K1  
Transistor (8 poles)  
47.0 - 47.0  
30  
Material  
Motor Type  
Input Power  
Output Power  
W
W
QLo  
rpm  
rpm  
rpm  
rpm  
rpm  
610  
630  
Lo  
Me  
Hi  
710  
790  
Speed  
920  
1030  
1130  
1270  
SHi  
1230  
1400  
Type  
Propeller  
PP  
Propeller  
PP  
Material  
Motor Type  
Input Power  
Output Power  
Induction (6 poles)  
-
Induction (6 poles)  
-
W
W
28  
28  
Speed  
Hi  
rpm  
760 - 840  
0.6 (1.3)  
5.65 (199)  
6.76 (239)  
9.08 (321)  
11.4 (400)  
12.51 (442)  
760 - 840  
1.1 (2.3)  
Moisture Removal  
L/h (Pt/h)  
QLo  
Lo  
m3/min (ft3/min)  
m3/min (ft3/min)  
m3/min (ft3/min)  
m3/min (ft3/min)  
m3/min (ft3/min)  
5.30 (187)  
6.98 (246)  
9.49 (335)  
12.0 (425)  
13.36 (472)  
Indoor Airflow  
Me  
Hi  
SHi  
Outdoor  
Airflow  
Hi  
m3/min (ft3/min)  
29.7 (1050)  
31.0 (1095)  
29.7 (1050)  
31.0 (1095)  
5
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Control Device  
Refrigerant Oil  
Refrigerant Type  
Height(I/D / O/D)  
Width (I/D / O/D)  
Depth (I/D / O/D)  
Net (I/D / O/D)  
Capillary Tube  
Capillary Tube  
Refrigeration  
Cycle  
cm3  
RB68A or Freol Alpha68M (320)  
R410A, 965 (34.1)  
RB68A or Freol Alpha68M (320)  
R410A, 980 (34.6)  
g (oz)  
mm (inch)  
mm (inch)  
mm (inch)  
kg (lb)  
290 (11-7/16) / 540 (21-9/32)  
870 (34-9/32) / 780 (30-23/32)  
204 (8-1/16) / 289 (11-13/32)  
290 (11-7/16) / 540 (21-9/32)  
870 (34-9/32) / 780 (30-23/32)  
204 (8-1/16) / 289 (11-13/32)  
Dimension  
Weight  
9 (20)  
37 (82)  
9 (20)  
37 (82)  
Pipe Diameter (Liquid /  
Gas)  
mm (inch)  
6.35 (1/4) / 9.52 (3/8)  
6.35 (1/4) / 12.70 (1/2)  
Standard length  
Length range (min – max)  
I/D & O/D Height different  
Additional Gas Amount  
Length for Additional Gas  
Inner Diameter  
m (ft)  
m (ft)  
7.5 (24.6)  
3 (9.8) ~ 15 (49.2)  
5 (16.4)  
7.5 (24.6)  
3 (9.8) ~ 15 (49.2)  
5 (16.4)  
m (ft)  
g/m (oz/ft)  
m (ft)  
20 (0.2)  
20 (0.2)  
7.5 (24.6)  
7.5 (24.6)  
mm (inch)  
mm (inch)  
16.7 (5/8)  
16.7 (5/8)  
Drain Hose  
Length  
Fin Material  
650 (25-5/8)  
650 (25-5/8)  
Aluminium (Pre Coat)  
Slit Fin  
Aluminium (Pre Coat)  
Slit Fin  
Fin Type  
Indoor Heat  
Exchanger  
Row x Stage x FPI  
Size (W x H x L)  
Fin Material  
2 x 15 x 19  
2 x 15 x 21  
inch  
inch  
A
(1) x (12-3/8) x (24)  
Aluminium (Blue coated)  
Corrugate Fin  
2 x 24 x 17  
(1) x (12-3/8) x (24)  
Aluminium (Blue coated)  
Corrugate Fin  
2 x 24 x 17  
Outdoor  
Heat  
Exchanger  
Fin Type  
Row x Stage x FPI  
(1-3/8) x (19-7/8) x (28-1/8)  
(26-7/8)  
(1-3/8) x (19-7/8) x (28-1/8)  
(26-7/8)  
Size (W x H x L)  
Material  
Type  
Polypropelene  
Polypropelene  
Air Filter  
One-touch  
One-touch  
Power Supply  
Outdoor  
Outdoor  
Power Supply Cord  
Thermostat  
-
-
-
-
-
-
Protection Device  
DRY BULB  
89.6  
WET BULB  
73.4  
DRY BULB  
89.6  
WET BULB  
73.4  
Maximum  
Minimum  
Maximum  
Minimum  
Indoor Operation Range  
Outdoor Operation Range  
60.8  
109.4  
60.8  
51.8  
78.8  
51.8  
60.8  
109.4  
60.8  
51.8  
78.8  
51.8  
1. Cooling capacities are based on indoor temperature of 80.6°F DRY BULB, 66°F WET BULB and outdoor air temperature of 95°F DRY BULB,  
75.2°F WET BULB.  
6
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Indoor  
CS-S18NKU-1  
CU-S18NKU-1  
ARI  
CS-S22NKU-1  
CU-S22NKU-1  
ARI  
Model  
Outdoor  
Performance Test Condition  
Phase, Hz  
Single, 60  
Single, 60  
Power Supply  
V
208  
Mid.  
5.01  
230  
Mid.  
5.01  
208  
Mid.  
6.18  
230  
Mid.  
6.18  
Min.  
1.30  
Max.  
5.80  
Min.  
1.30  
Max.  
5.80  
Min.  
1.30  
Max.  
6.85  
Min.  
1.30  
Max.  
6.85  
kW  
Capacity  
BTU/h  
4400 17100 19800 4400 17100 19800 4400 21000 23400 4400 21000 23400  
Running Current  
Input Power  
A
-
8.3  
1.65k 1.95k  
3.04 2.97  
-
-
7.5  
1.65k 1.95k  
3.04 2.97  
-
-
11.2  
2.25k 2.55k  
2.75 2.69  
-
-
10.0  
-
W
W/W  
250  
5.20  
250  
5.20  
250  
5.20  
250  
5.20  
2.25k 2.55k  
2.75  
2.69  
9.15  
-
EER  
Btu/hW  
%
17.60 10.35 10.15 17.60 10.35 10.15 17.60 9.30  
9.15 17.60 9.30  
Power Factor  
-
96  
47 / 39 / 36  
63 / -  
-
-
96  
47 / 39 / 36  
63 / -  
-
-
97  
47 / 39 / 36  
63 / -  
-
-
98  
47 / 39 / 36  
63 / -  
dB-A  
Indoor Noise (H / L / QLo)  
Power Level dB  
dB-A  
47 / - / -  
61 / -  
47 / - / -  
61 / -  
50 / - / -  
64 / -  
50 / - / -  
64 / -  
Outdoor Noise (H / L / QLo)  
Power Level dB  
Max Current (A) / Max Input Power (W)  
Starting Current (A)  
9.0 / 1.99k  
8.3  
10.8 / 2.48k  
11.2  
Min Circuit Ampacity  
Max. Overcurrent Protection  
Type  
15.0  
20.0  
20.0  
25.0  
Hermetic Motor (Scroll)  
Brushless (4 poles)  
900  
Hermetic Motor (Scroll)  
Brushless (4 poles)  
900  
Compressor  
Motor Type  
Output Power  
W
Type  
Cross-flow fan  
ASG30K1  
Transistor (8 poles)  
94.8 - 94.8  
30  
Cross-flow fan  
ASG30K1  
Transistor (8 poles)  
94.8 - 94.8  
30  
Material  
Motor Type  
Input Power  
Output Power  
W
W
QLo  
rpm  
rpm  
rpm  
rpm  
rpm  
990  
990  
Lo  
Me  
Hi  
1090  
1090  
Speed  
1270  
1270  
1460  
1460  
SHi  
1500  
1500  
Type  
Propeller  
PP  
Propeller  
PP  
Material  
Motor Type  
Input Power  
Output Power  
Induction (8 poles)  
-
Induction (8 poles)  
-
W
W
38  
38  
Speed  
Hi  
rpm  
500 - 550  
1.7 (3.6)  
550 - 600  
2.9 (6.1)  
Moisture Removal  
L/h (Pt/h)  
QLo  
Lo  
m3/min (ft3/min)  
m3/min (ft3/min)  
m3/min (ft3/min)  
m3/min (ft3/min)  
m3/min (ft3/min)  
11.73 (414)  
13.15 (464)  
15.70 (554)  
18.4 (650)  
18.97 (670)  
11.73 (414)  
13.15 (464)  
15.70 (554)  
18.4 (650)  
18.97 (670)  
Indoor Airflow  
Me  
Hi  
SHi  
Outdoor  
Airflow  
Hi  
m3/min (ft3/min)  
37.5 (1325)  
41.6 (1470)  
43.8 (1545)  
47.5 (1675)  
7
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Control Device  
Refrigerant Oil  
Refrigerant Type  
Height(I/D / O/D)  
Width (I/D / O/D)  
Depth (I/D / O/D)  
Net (I/D / O/D)  
Expansion Valve  
Expansion Valve  
Refrigeration  
Cycle  
cm3  
RB68A or Freol Alpha68M (400)  
R410A, 1.18k (41.7)  
RB68A or Freol Alpha68M (400)  
R410A, 1.37k (48.4)  
g (oz)  
mm (inch)  
mm (inch)  
mm (inch)  
kg (lb)  
290 (11-7/16) / 795 (31-5/16)  
1070 (42-5/32) / 875 (34-15/32)  
235 (9-9/32) / 320 (12-5/8)  
290 (11-7/16) / 795 (31-5/16)  
1070 (42-5/32) / 875 (34-15/32)  
235 (9-9/32) / 320 (12-5/8)  
Dimension  
Weight  
12 (26)  
52 (115)  
12 (26)  
53 (117)  
Pipe Diameter (Liquid / Gas)  
Standard length  
mm (inch)  
m (ft)  
6.35 (1/4) / 12.70 (1/2)  
6.35 (1/4) / 15.88 (5/8)  
5.0 (16.4)  
3 (9.8) ~ 20 (65.6)  
15 (49.2)  
5.0 (16.4)  
3 (9.8) ~ 20 (65.6)  
15 (49.2)  
Length range (min – max)  
I/D & O/D Height different  
Additional Gas Amount  
Length for Additional Gas  
Inner Diameter  
m (ft)  
m (ft)  
g/m (oz/ft)  
m (ft)  
20 (0.2)  
20 (0.2)  
10 (32.8)  
10 (32.8)  
mm (inch)  
mm (inch)  
16.7 (5/8)  
16.7 (5/8)  
Drain Hose  
Length  
Fin Material  
650 (25-5/8)  
650 (25-5/8)  
Aluminium (Pre Coat)  
Slit Fin  
Aluminium (Pre Coat)  
Slit Fin  
Fin Type  
Indoor Heat  
Exchanger  
Row x Stage x FPI  
Size (W x H x L)  
Fin Material  
2 x 15 x 21  
2 x 15 x 21  
inch  
inch  
A
(1) x (12-3/8) x (31-7/8)  
Aluminium (Blue coated)  
Corrugate Fin  
2 x 36 x 19  
(1) x (12-3/8) x (31-7/8)  
Aluminium (Blue coated)  
Corrugate Fin  
Outdoor  
Heat  
Exchanger  
Fin Type  
Row x Stage x FPI  
2 x 36 x 18  
(1-3/8) x (29-3/4) x (24-3/8)  
(24-3/8)  
(1-3/8) x (29-3/4) x (33)  
Size (W x H x L)  
(31-7/8)  
Material  
Type  
Polypropelene  
Polypropelene  
Air Filter  
One-touch  
One-touch  
Power Supply  
Outdoor  
Outdoor  
Power Supply Cord  
Thermostat  
-
-
-
-
-
-
Protection Device  
DRY BULB  
89.6  
WET BULB  
73.4  
DRY BULB  
WET BULB  
73.4  
Maximum  
Minimum  
Maximum  
Minimum  
89.6  
60.8  
Indoor Operation Range  
Outdoor Operation Range  
60.8  
109.4  
60.8  
51.8  
78.8  
51.8  
51.8  
109.4  
60.8  
78.8  
51.8  
1. Cooling capacities are based on indoor temperature of 80.6°F DRY BULB, 66°F WET BULB and outdoor air temperature of 95°F DRY BULB,  
75.2°F WET BULB.  
8
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3. Location of Controls and Components  
3.1 Indoor Unit  
3.2 Outdoor Unit  
3.3 Remote Control  
9
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4. Dimensions  
4.1 Indoor Unit  
4.1.1  
CS-S9NKUW-1 CS-S12NKUW-1  
10  
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4.1.2  
CS-S18NKU-1 CS-S22NKU-1  
11  
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4.2 Outdoor Unit  
4.2.1  
CU-S9NKU-1 CU-S12NKU-1  
4.2.2  
CU-S18NKU-1 CU-S22NKU-1  
12  
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5. Refrigeration Cycle Diagram  
5.1 CS-S9NKUW-1 CU-S9NKU-1 CS-S12NKUW-1 CU-S12NKU-1  
13  
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5.2 CS-S18NKU-1 CU-S18NKU-1 CS-S22NKU-1 CU-S22NKU-1  
14  
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6. Block Diagram  
6.1 CS-S9NKUW-1 CU-S9NKU-1 CS-S12NKUW-1 CU-S12NKU-1  
15  
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6.2 CS-S18NKU-1 CU-S18NKU-1 CS-S22NKU-1 CU-S22NKU-1  
16  
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7. Wiring Connection Diagram  
7.1 Indoor Unit  
7.1.1  
CS-S9NKUW-1 CS-S12NKUW-1  
17  
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7.1.2  
CS-S18NKU-1 CS-S22NKU-1  
18  
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7.2 Outdoor Unit  
7.2.1  
CU-S9NKU-1 CU-S12NKU-1  
19  
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7.2.2  
CU-S18NKU-1  
20  
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7.2.3  
CU-S22NKU-1  
21  
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8. Electronic Circuit Diagram  
8.1 Indoor Unit  
8.1.1  
CS-S9NKUW-1 CS-S12NKUW-1  
22  
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8.1.2  
CS-S18NKU-1 CS-S22NKU-1  
23  
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8.2 Outdoor Unit  
8.2.1  
CU-S9NKU-1 CU-S12NKU-1  
24  
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8.2.2  
CU-S18NKU-1  
25  
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8.2.3  
CU-S22NKU-1  
26  
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9. Printed Circuit Board  
9.1 Indoor Unit  
9.1.1  
Main Printed Circuit Board  
27  
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9.1.2  
Power Printed Circuit Board  
9.1.3  
Indicator Printed Circuit Board  
28  
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9.2 Outdoor Unit  
9.2.1  
Main Printed Circuit Board  
CU-S9NKU-1 CU-S12NKU-1  
9.2.1.1  
29  
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9.2.1.2  
CU-S18NKU-1 CU-S22NKU-1  
30  
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10. Installation Instruction  
10.1 S9NKUW-1 S12NKUW-1  
10.1.1 Select the Best Location  
10.1.1.1 Indoor Unit  
10.1.2 Indoor/Outdoor Unit Installation  
Diagram  
•
•
•
Do not install the unit in excessive oil fume area  
such as kitchen, workshop and etc.  
There should not be any heat source or steam  
near the unit.  
There should not be any obstacles blocking the air  
circulation.  
•
•
•
A place where air circulation in the room is good.  
A place where drainage can be easily done.  
A place where noise prevention is taken into  
consideration.  
•
•
Do not install the unit near a door way.  
Ensure the spaces indicated by arrows from the  
wall, ceiling, fence or other obstacles.  
Recommended installation height for indoor unit  
shall be at least 8.2 ft.  
•
10.1.1.2 Outdoor Unit  
•
If an awning is built over the unit to prevent direct  
sunlight or rain, be careful that heat radiation from  
the condenser is not obstructed.  
•
•
•
•
There should not be any animal or plant which  
could be affected by hot air discharged.  
Keep the spaces indicated by arrows from wall,  
ceiling, fence or other obstacles.  
Do not place any obstacles which may cause a  
short circuit of the discharged air.  
If piping length is over the [piping length for  
additional gas], additional refrigerant should be  
added as shown in the table.  
Example: For S9NKUW-1  
If the unit is installed at 32.8 ft distance, the quantity of  
additional refrigerant should be 1.64 oz .... (32.8 - 24.6)  
ft x 0.2 oz/ft = 1.64 oz.  
31  
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10.1.3  
Indoor Unit  
10.1.3.1 How to Fix Installation Plate  
The mounting wall shall be strong and solid enough to prevent if from the vibration.  
The centre of installation plate should be at more than c at right and left of the wall.  
The distance from installation plate edge to ceiling should more than d.  
From installation plate left edge to unit’s left side is e.  
From installation plate right edge to unit’s right side is f.  
B
○
: For left side piping, piping connection for liquid should be about g from this line.  
: For left side piping, piping connection for gas should be about h from this line.  
1
2
Mount the installation plate on the wall with 5 screws or more (at least 5 screws).  
(If mounting the unit on the concrete wall, consider using anchor bolts.)  
o
Always mount the installation plate horizontally by aligning the marking-off line with the thread and using  
a level gauge.  
Drill the piping plate hole with ø2 ¾” hole-core drill.  
o
Line according to the left and right side of the installation plate. The meeting point of the extended line is  
the center of the hole. Another method is by putting measuring tape at position as shown in the diagram  
above. The hole center is obtained by measuring the distance namely 5 1/16” for left and right hole  
respectively.  
o
Drill the piping hole at either the right or the left and the hole should be slightly slanting to the outdoor  
side.  
10.1.3.2 To Drill a Hole in the Wall and  
Install a Sleeve of Piping  
1
2
3
Insert the piping sleeve to the hole.  
Fix the bushing to the sleeve.  
Cut the sleeve until it extrudes about 19/32”  
from the wall.  
4
Finish by sealing the sleeve with putty or  
caulking compound at the final stage.  
32  
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10.1.3.3 Indoor Unit Installation  
10.1.3.4  
10.1.3.5  
10.1.3.6  
For the right rear piping  
For the right bottom piping  
For the embedded piping  
(This can be used for left rear piping and bottom  
piping also.)  
33  
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10.1.3.7  
Connect the Cable to the Indoor Unit  
1. The inside and outside connecting cable can  
be connected without removing the front grille.  
2. Unscrew the conduit cover and fix the conduit  
connector to conduit cover with lock nut, then  
secure it against chassis.  
3. Connecting wire between indoor unit and  
outdoor unit should be UL listed or CSA  
approved 4 conductor wires minimum AWG16  
in accordance with local electric codes.  
o
Ensure the colour of wires of outdoor unit  
and terminal number are the same as the  
indoor's respectively.  
This equipment must be properly earthed.  
Earth lead wire shall be Yellow/Green  
(Y/G) in colour and shall be longer than  
other lead wires as shown in the figure for  
electrical safety in case of the slipping.  
o
34  
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10.1.3.8 Wire Stripping and connecting requirement  
10.1.3.9  
Cutting and flaring the piping  
1
2
Please cut using pipe cutter and then remove the burrs.  
Remove the burrs by using reamer. If burrs is not removed, gas leakage may be caused. Turn the piping end  
down to avoid the metal powder entering the pipe.  
3
Please make flare after inserting the flare nut onto the copper pipes.  
35  
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10.1.4 Outdoor Unit  
10.1.4.1 Install the Outdoor Unit  
•
After selecting the best location, start installation to Indoor/Outdoor Unit Installation Diagram.  
1
2
Fix the unit on concrete or rigid frame firmly and horizontally by bolt nut (ø13/32”).  
When installing at roof, please consider strong wind and earthquake.  
Please fasten the installation stand firmly with bolt or nails.  
Model  
A
B
C
D
S9NKUW-1,  
S12NKUW-1  
22 7/16”  
4 1/8”  
23/32”  
12 19/32”  
10.1.4.2 Connect the Piping  
Do not over tighten, over tightening may cause gas leakage.  
10.1.4.2.1  
Connecting the piping to  
indoor  
Piping size  
1/4”  
Torque  
13.3 lbf.ft  
31.0 lbf.ft  
40.6 lbf.ft  
47.9 lbf.ft  
73.8 lbf.ft  
Please make flare after inserting flare nut (locate at  
joint portion of tube assembly) onto the copper pipe.  
(In case of using long piping)  
3/8”  
1/2”  
5/8”  
3/4”  
Connect the piping  
•
Align the center of piping and sufficiently tighten  
the flare nut with fingers.  
•
Further tighten the flare nut with torque wrench in  
specified torque as stated in the table.  
10.1.4.2.2  
Connecting the piping to  
outdoor  
Decide piping length and then cut by using pipe cutter.  
Remove burrs from cut edge.  
Make flare after inserting the flare nut (locate at valve)  
onto the copper pipe.  
Align center of piping to valve and then tighten with  
torque wrench to the specified torque as stated in the  
table.  
10.1.4.2.3  
Connecting the piping to outdoor multi  
Decide piping length and then cut by using pipe cutter. Remove burrs from cut edge.  
Make flare after inserting the flare nut (locate at valve) onto the copper pipe.  
Align center of piping to valve and then tighten with torque wrench to the specified torque as stated in the table.  
36  
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10.1.4.2.4  
Gas leak checking  
Pressure test to system to 400 PSIG with dry nitrogen, in stages. Thoroughly leak check the system.  
If the pressure holds, release the nitrogen and proceed to section 10.1.4.3.  
10.1.4.3 Evacuation of the equipment  
When installing an air conditioner, be sure to evacuate the air inside the indoor unit and pipes in the following  
procedures.  
1. Connect a charging hose with a push pin to the Low side of a charging set and the service port of the 3-way  
valve.  
2. Connect the micron gauge between vacuum pump and service port of outdoor units.  
3. Turn on the power switch of the vacuum pump and make sure that connect digital micron gauge and to pull  
down to a value of 500 microns.  
4. To make sure micron gauge a value 500 microns and close the low side valve of the charging set and turn off  
the vacuum pump.  
5. Disconnect the vacuum pump hose from the service port of the 3-way valve.  
6. Tighten the service port caps of the 3-way valve at a torque of 13.3 Ibf.ftwith a torque wrench.  
7. Remove the valve caps of both of the 2-way valve and 3-way valve. Position both of the valves to “Open”  
using a hexagonal wrench (5/32”).  
8. Mount valve caps onto the 2-way valve and the 3-way valve.  
o
Be sure to check for gas leakage.  
10.1.4.4 Connect the Cable to the Outdoor Unit  
1. Remove Top panel.  
2. Remove Control Board Cover (Resin and Metal).  
3. Remove Plugs.  
4. Fix the conduit connectors to the knockout holes with  
lock-nuts, then secure them against the side panel.  
5. All wires pass through conduits.  
6. Connecting wire between indoor unit and outdoor unit  
should be UL listed or CSA approved 4 conductor  
wires minimum AWG16 in accordance with local  
electric codes.  
7. Wire connection to the power supply (208/230V 60Hz)  
through circuit breaker.  
o
Connect the UL listed or CSA approved wires  
minimum AWG14 to the terminal board, and  
connect the other end of the wires to ELCB /  
GFCI.  
8. Connect the power supply cord and connecting wire  
between indoor unit and outdoor unit according to the diagram below.  
37  
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9. Secure the wire onto the control board with the holder  
(clamper).  
10. After completing wiring connections, reattach the control  
board cover (Metal and Resin) and the top panel to the  
original position with the screws.  
11. For wire stripping and connection requirement, refer to  
instruction g of indoor unit.  
This equipment must be properly earthed.  
o
Earth lead wire shall be Yellow/Green (Y/G) in colour  
and shall be longer than other lead wires as shown in  
the figure for electrical safety in case of the slipping.  
10.1.4.5 Piping Insulation  
1. Please carry out insulation at pipe connection portion as mentioned in Indoor/Outdoor Unit Installation  
Diagram. Please wrap the insulated piping end to prevent water from going inside the piping.  
2. If drain hose or connecting piping is in the room (where dew may form), please increase the insulation by  
using POLY-E FOAM with thickness ¼” or above.  
38  
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10.2 S18NKU-1 S22NKU-1  
10.2.1 Select the Best Location  
10.2.1.1 Indoor Unit  
10.2.2 Indoor/Outdoor Unit Installation  
Diagram  
•
•
•
Do not install the unit in excessive oil fume areas  
such as kitchens, workshops etc.  
There should not be any heat source or steam  
near the unit.  
There should not be any obstacles blocking the air  
circulation.  
•
•
•
A place where air circulation in the room is good.  
A place where drainage can be easily done.  
A place where noise prevention is taken into  
consideration.  
•
•
Do not install the unit near a doorway.  
Ensure the spaces indicated by arrows from the  
wall, ceiling, fence or other obstacles.  
Recommended installation height for indoor unit  
shall be at least 8.2 ft.  
•
10.2.1.2 Outdoor Unit  
•
If an awning is built over the unit to prevent direct  
sunlight or rain, be careful that heat radiation from  
the condenser is not obstructed.  
•
•
•
•
There should not be any animal or plant which  
could be affected by hot air discharged.  
Keep the spaces indicated by arrows from wall,  
ceiling, fence or other obstacles.  
Do not place any obstacles which may cause a  
short circuit of the discharged air.  
If piping length is over the [piping length for  
additional gas], additional refrigerant should be  
added as shown in the table.  
•
Recommended installation height for outdoor unit  
should be above the seasonal snow level.  
Example: For S18NKU-1  
If the unit is installed at 41 ft distance, the quantity of  
additional refrigerant should be 1.64 oz .... (41 - 32.8)  
ft x 0.2 oz/ft = 1.64 oz.  
39  
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10.2.3  
Indoor Unit  
10.2.3.1 How to Fix Installation Plate  
The mounting wall must be strong and solid enough to prevent if from the vibration.  
The centre of installation plate should be at more than c at right and left of the wall.  
The distance from installation plate edge to ceiling should more than d.  
From installation plate left edge to unit’s left side is e.  
From installation plate right edge to unit’s right side is f.  
B
○
: For left side piping, piping connection for liquid should be about g from this line.  
: For left side piping, piping connection for gas should be about h from this line.  
1
2
Mount the installation plate on the wall with 5 screws or more (at least 5 screws).  
(If mounting the unit on the concrete wall, consider using anchor bolts.)  
o
Always mount the installation plate horizontally by aligning the marking-off line with the thread and using  
a level gauge.  
Drill the piping plate hole with ø2 ¾” hole-core drill.  
o
Line according to the left and right side of the installation plate. The meeting point of the extended line is  
the center of the hole. Another method is by putting measuring tape at position as shown in the diagram  
above. The hole center is obtained by measuring the distance namely 5 1/16” for left and right hole  
respectively.  
o
Drill the piping hole at either the right or the left and the hole should be slightly slanting to the outdoor  
side.  
10.2.3.2 To Drill a Hole in the Wall and  
Install a Sleeve of Piping  
1
2
3
Insert the piping sleeve to the hole.  
Fix the bushing to the sleeve.  
Cut the sleeve until it extrudes about 19/32”  
from the wall.  
4
Finish by sealing the sleeve with putty or  
caulking compound at the final stage.  
40  
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10.2.3.3 Indoor Unit Installation  
10.2.3.4  
10.2.3.5  
10.2.3.6  
For the right rear piping  
For the right bottom piping  
For the embedded piping  
(This can be used for left rear piping and bottom  
piping also.)  
41  
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10.2.3.7  
Connect the Cable to the Indoor Unit  
1. The inside and outside connecting cable can  
be connected without removing the front grille.  
2. Unscrew the conduit cover and fix the conduit  
connector to conduit cover with lock nut, then  
secure it against chassis.  
3. Connecting wire between indoor unit and  
outdoor unit should be UL listed or CSA  
approved 4 conductor wires minimum AWG16  
in accordance with local electric codes.  
o
Ensure the colour of wires of outdoor unit  
and terminal number are the same as the  
indoor's respectively.  
This equipment must be properly earthed.  
Earth lead wire shall be Yellow/Green  
(Y/G) in colour and shall be longer than  
other lead wires as shown in the figure for  
electrical safety in case of the slipping.  
o
42  
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10.2.3.8 Wire Stripping and connecting requirement  
10.2.3.9  
Cutting and flaring the piping  
1
2
Please cut using pipe cutter and then remove the burrs.  
Remove the burrs by using reamer. If burrs is not removed, gas leakage may be caused. Turn the piping end  
down to avoid the metal powder entering the pipe.  
3
Please make flare after inserting the flare nut onto the copper pipes.  
43  
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10.2.4 Outdoor Unit  
10.2.4.1 Install the Outdoor Unit  
•
After selecting the best location, start installation to Indoor/Outdoor Unit Installation Diagram.  
1
2
Fix the unit on concrete or rigid frame firmly and horizontally by bolt nut (ø13/32”).  
When installing at roof, please consider strong wind and earthquake.  
Please fasten the installation stand firmly with bolt or nails.  
Model  
A
B
C
D
S18NKU-1,  
S22NKU-1  
24 1/8”  
5 5/32”  
5/8”  
14 3/32”  
10.2.4.2 Connect the Piping  
Do not over tighten, over tightening may cause gas leakage.  
Piping size  
1/4”  
Torque  
10.2.4.2.1  
Connecting the piping to  
indoor  
13.3 lbf.ft  
31.0 lbf.ft  
40.6 lbf.ft  
47.9 lbf.ft  
73.8 lbf.ft  
3/8”  
Please make flare after inserting flare nut (locate at  
joint portion of tube assembly) onto the copper pipe.  
(In case of using long piping)  
1/2”  
5/8”  
3/4”  
Connect the piping  
•
Align the center of piping and sufficiently tighten  
the flare nut with fingers.  
•
Further tighten the flare nut with torque wrench in  
specified torque as stated in the table.  
10.2.4.2.2  
Connecting the piping to  
outdoor  
Decide piping length and then cut by using pipe cutter.  
Remove burrs from cut edge.  
Make flare after inserting the flare nut (locate at valve)  
onto the copper pipe.  
Align center of piping to valve and then tighten with  
torque wrench to the specified torque as stated in the  
table.  
10.2.4.2.3  
Gas leak checking  
Pressure test to system to 400 PSIG with dry nitrogen, in stages. Thoroughly leak check the system.  
If the pressure holds, release the nitrogen and proceed to section 10.2.4.3.  
44  
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10.2.4.3 Evacuation of the equipment  
When installing an air conditioner, be sure to evacuate the air inside the indoor unit and pipes in the following  
procedures.  
1. Connect a charging hose with a push pin to the Low side of a charging set and the service port of the 3-way  
valve.  
2. Connect the micron gauge between vacuum pump and service port of outdoor units.  
3. Turn on the power switch of the vacuum pump and make sure that connect digital micron gauge and to pull  
down to a value of 500 microns.  
4. To make sure micron gauge a value 500 microns and close the low side valve of the charging set and turn off  
the vacuum pump.  
5. Disconnect the vacuum pump hose from the service port of the 3-way valve.  
6. Tighten the service port caps of the 3-way valve at a torque of 13.3 Ibf.ftwith a torque wrench.  
7. Remove the valve caps of both of the 2-way valve and 3-way valve. Position both of the valves to “Open”  
using a hexagonal wrench (5/32”).  
8. Mount valve caps onto the 2-way valve and the 3-way valve.  
o
Be sure to check for gas leakage.  
10.2.4.4 Connect the Cable to the Outdoor Unit  
1. Remove control board cover (Resin and Metal).  
2. Remove particular plate.  
3. Remove plugs.  
4. Fix the conduit connectors to the knockout holes with lock-nuts, then secure them against the side panel.  
5. All wires pass through conduits & particular plate’s opening hole.  
6. Connecting wire between indoor unit and outdoor unit should be UL listed or CSA approved 4 conductor  
wires minimum AWG16 in accordance with local electric codes.  
7. Wire connection to the power supply (208/230V 60Hz) through circuit breaker.  
o
Connect the UL listed or CSA approved wires minimum AWG12 to the terminal board, and connect the  
other end of the wires to ELCB / GFCI.  
8. Connect the power supply cord and connecting wire between indoor unit and outdoor unit according to the  
diagram below.  
45  
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9. Secure the wire onto the control board with the holder (clamper).  
10. After completing wiring connections, reattach the particular plate and control board cover (metal and resin) to  
the original position with the screws.  
11. For wire stripping and connection requirement, refer to instruction g of indoor unit.  
This equipment must be properly earthed.  
o
Earth lead wire shall be Yellow/Green (Y/G) in colour and longer than other lead wires for electrical  
safety in case of the slipping.  
10.2.4.5 Piping Insulation  
1. Please carry out insulation at pipe connection portion as mentioned in Indoor/Outdoor Unit Installation  
Diagram. Please wrap the insulated piping end to prevent water from going inside the piping.  
2. If drain hose or connecting piping is in the room (where dew may form), please increase the insulation by  
using POLY-E FOAM with thickness ¼” or above.  
46  
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11. Operation Control  
11.1 Basic Function  
Inverter control, which equipped with a microcomputer in determining the most suitable operation mode as time  
passes, automatically adjusts output power for maximum comfort always. In order to achieve the suitable operation  
mode, the microcomputer maintains the set temperature by measuring the temperature of the environment and  
performing temperature shifting. The compressor at outdoor unit is operating following the frequency instructed by  
the microcomputer at indoor unit that judging the condition according to internal setting temperature and intake air  
temperature.  
11.1.1 Internal Setting Temperature  
Once the operation starts, remote control setting temperature will be taken as base value for temperature shifting  
processes. These shifting processes are depending on the air conditioner settings and the operation environment.  
The final shifted value will be used as internal setting temperature and it is updated continuously whenever the  
electrical power is supplied to the unit.  
Remote Control Setting Temperature  
60.8°F ~ 86°F  
Indoor Air Temperature Shifting  
Outdoor Air Temperature Shifting  
Powerful Mode Shifting  
Setting Temperature Limit Checking  
(Min: 60.8°F; Max: 91.4°F)  
Internal Setting Temperature  
11.1.2 Cooling Operation  
11.1.2.1 Thermostat control  
•
•
Compressor is OFF when intake Air Temperature - Internal Setting Temperature < 29.3°F.  
Compressor is ON after waiting for 3 minutes, if the Intake Temperature - Internal Setting Temperature >  
Compressor OFF point.  
11.1.3 Soft Dry Operation  
11.1.3.1 Thermostat control  
•
•
Compressor is OFF when Intake Temperature - Internal Setting Temperature < 28.4°F.  
Compressor is ON after waiting for 3 minutes, if the Intake Air Temperature - Internal Setting Temperature >  
Compressor OFF point.  
11.1.3.2 Automatic Operation  
•
•
This mode can be set using remote control and the operation is decided by indoor intake air temperature.  
During operation mode judgment at the beginning of the Auto Mode operation, indoor fan motor (with speed of  
Lo-) is running for 30 seconds to detect the indoor intake air temperature.  
•
The operation mode is decided based on below chart.  
Cooling  
operation  
73.4°F  
Soft Dry  
operation  
Indoor intake  
Air Temp  
•
After the operation mode is decided, the unit operation will follow the respective operation mode control.  
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11.2 Indoor Fan Motor Operation  
11.2.1 Basic Rotation Speed  
•
Manual Fan Speed  
o
Fan motor’s number of rotation is determined according to remote control setting.  
Remote control  
Tab  
○
○
○
○
○
Hi  
Me+  
Me  
Me-  
Lo  
•
Auto Fan Speed  
o
o
According to room temperature and setting temperature, indoor fan speed is determined automatically.  
The indoor fan will operate according to pattern below.  
Fan Speed  
a
b
c
d
e
f
g
h
a
b
Higher  
Medium  
Lower  
[1 pattern : 10s]  
•
Feedback control  
o
o
Immediately after the fan motor is started, feedback control is performed once every second.  
During fan motor on, if fan motor feedback ≥ 2550 rpm or <50 rpm continuously for 10 seconds, the fan  
motor error counter increased; fan motor is then stopped and restarted. If the fan motor error counter  
increased to 7, then H19 – fan motor error is detected. Operation stopped and could not be restarted.  
11.3 Outdoor Fan Motor Operation (For S9NK and S12NK)  
Outdoor fan motor is operated with one fan speed only. Outdoor fan turns on when compressor starts to operate. But  
outdoor fan will turns off 30 seconds after compressor stops to operate.  
ON  
ON  
Compressor  
Outdoor Fan  
OFF  
OFF  
ON  
Fan Speed  
ƒ30 sec„  
ON  
11.4 Outdoor Fan Motor Operation (For S18NK and S22NK)  
There is 2 speeds for outdoor fan motor. Outdoor fan speed can be changed to Hi or Shi according to outdoor  
temperature. By default, the outdoor fan speed is set to Hi. For Cooling or Soft Dry operation, when outdoor  
temperature reaches 100.4°F the outdoor fan speed is set to Shi, when outdoor temperature reduced to 98.6°F the  
fan speed will set to Hi again. Outdoor fan will turns off 30 seconds after compressor stops to operate.  
ON  
ON  
Compressor  
Outdoor Fan  
OFF  
ON  
Fan Speed  
ƒ30 sec„  
ON  
OFF  
(For S18NK and S22NK)  
11.5 Airflow Direction  
•
There are two types of airflow, vertical airflow (directed by horizontal vane) and horizontal airflow (directed by  
vertical vanes).  
•
Control of airflow direction can be automatic (angles of direction is determined by operation mode, heat  
exchanger temperature and intake air temperature) and manual (angles of direction can be adjusted using  
remote control).  
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11.5.1 Vertical Airflow  
Vane Angle (°)  
Operation Mode  
Airflow Direction  
1
2
3
4
5
Auto  
Manual  
Auto  
20 ~ 45  
32  
20 ~ 45  
32  
Cooling  
Soft Dry  
20  
20  
26  
26  
37  
37  
45  
45  
Manual  
•
•
Automatic vertical airflow direction can be set using remote control; the vane swings up and down within the  
angles as stated above. It does not swing during fan motor stop. When the air conditioner is stopped using  
remote control, the vane will shift to close position.  
Manual vertical airflow direction can be set using remote control; the angles of the vane are as stated above and  
the positions of the vane are as figure below. When the air conditioner is stopped using remote control, the vane  
will shift to close position.  
Side View  
1
2
140°  
3
Close position  
4
5
11.5.2 Horizontal Airflow  
11.5.2.1 S9NK, S12NK  
The horizontal airflow direction louvers can be adjusted manually by hand.  
11.5.2.2 S18NK, S22NK  
•
Automatic airflow direction can be set using remote control; the vane swings left and right within the angles as  
stated below. It does not swing during fan motor stop.  
Operation Mode  
Cooling and soft dry  
Vane Angle (°)  
68 ~112  
•
Manual vertical airflow direction can be set using remote control; the angles of the vane are as stated below and  
the positions of the vane are as figure below:  
11.6 Quiet Operation (Cooling Mode/Cooling Area of Dry Mode)  
•
Purpose  
o
To provide quiet cooling operation compare to normal operation.  
•
Control condition  
o
Quiet operation start condition  
When Quiet button at remote control is pressed Quiet INDICATOR illuminates.  
Quiet operation stop condition  
When one of the following conditions is satisfied, quiet operation stops:  
ƒ
o
ƒ
•
•
•
•
Powerful button is pressed.  
Stop by OFF/ON button.  
OFF Timer activates.  
Quiet button is pressed again.  
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ƒ
ƒ
ƒ
ƒ
ƒ
When quiet operation is stopped, operation is shifted to normal operation with previous setting.  
When fan speed is changed, quiet operation is shifted to quiet operation of the new fan speed.  
When operation mode is changed, quiet operation is shifted to quiet operation of the new mode.  
During quiet operation, if ON timer activates, quiet operation maintains.  
After off, when on back, quiet operation is not memorized.  
•
Control content  
o
Fan speed is changed from normal setting to quiet setting of respective fan speed. This is to reduce sound of  
Hi, Me, Lo for 3dB (more than 3dB for some models).  
o
Fan speed for quiet operation is -1 step from setting fan speed.  
11.7 Powerful Mode Operation  
•
When the powerful mode is selected, the internal setting temperature will shift lower up to 35.6°F (for  
Cooling/Soft Dry) than remote control setting temperature for 20 minutes and the fan speed will increase to  
achieve the setting temperature quickly.  
•
Powerful operation stops condition  
o
When one of the following condition is satisfied, powerful operation stops:  
ƒ
ƒ
ƒ
ƒ
ƒ
Quiet button is pressed.  
Stop by OFF/ON button.  
OFF Timer activates.  
Powerful button is pressed again.  
Powerful operation continue for 20 minutes.  
11.8 Timer Control  
11.8.1 ON Timer Control  
ON timer can be set using remote control, the unit with timer set will start operate earlier than the setting time. This is  
to provide a comfortable environment when reaching the set ON time.  
60 minutes before the set time, indoor (at fan speed of Lo-) and outdoor fan motor start operate for 30 seconds to  
determine the indoor intake air temperature and outdoor air temperature in order to judge the operation starting time.  
From the judgment, the decided operation will start operation earlier than the set time as shown below.  
Indoor intake air  
temperature (°F)  
15 min  
86  
10 min  
77  
5 min  
Outdoor air  
86  
95  
temperature (°F)  
Cooling / Soft Dry  
11.8.2 OFF Timer Control  
OFF timer can be set using remote control, the unit with timer set will stop operate at set time.  
11.9 Random Auto Restart Control  
•
When the power supply is cut off during the operation of air conditioner, the compressor will re-operate within  
three to four minutes. There are 10 patterns to be selected randomly after power supply resumes.  
This control is not applicable during OFF/ON Timer setting.  
•
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11.10 Indication Panel  
LED  
POWER  
TIMER  
QUIET  
POWERFUL  
Color  
Green  
Orange  
Orange  
Orange  
Light ON Operation ON Timer Setting ON Quiet Mode ON Powerful Mode ON  
Light OFF Operation OFF Timer Setting OFF Quiet Mode OFF Powerful Mode OFF  
Note:  
•
•
If POWER LED blinks, the possible operation of the unit is operation mode judgment, or ON timer sampling.  
If TIMER LED blinks, there is an abnormal operation occurs.  
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12. Protection Control  
12.1 Restart Control (Time Delay Safety Control)  
•
The compressor will not turn on within 3 minutes from the moment operation stops, although the unit is turned on  
again by pressing OFF/ON button at remote control within this period.  
•
•
This control is not applicable if the power supply is cut off and on again.  
This phenomenon is to balance the pressure inside the refrigerant cycle.  
12.2 30 Seconds Forced Operation  
•
Once the air conditioner is turned on, the compressor will not stop within 30 seconds in a normal operation  
although the intake air temperature has reached the thermo-off temperature. However, force stop by pressing the  
OFF/ON button at the remote control is permitted or the Auto OFF/ON button at indoor unit.  
The reason for the compressor to force operation for minimum 30 seconds is to allow the refrigerant oil run in a  
full cycle and return back to the outdoor unit.  
•
12.3 Total Running Current Control  
•
When the outdoor unit total running current (AC) exceeds X value, the frequency instructed for compressor  
operation will be decreased.  
•
If the running current does not exceed X value for 5 seconds, the frequency instructed will be increased.  
Model  
S9***  
X (A)  
3.89  
S12***  
X (A)  
5.19  
S18***  
X (A)  
8.77  
S22***  
X (A)  
11.05  
9.55  
Operation Mode  
Cooling / Soft Dry (A)  
Cooling / Soft Dry (B)  
3.28  
4.63  
7.72  
•
The first 30 minutes of cooling operation, (A) will be applied.  
12.4 IPM (Power Transistor) Prevention Control  
12.4.1 S9NK, S12NK  
•
•
Overheating Prevention Control  
o
o
When the IPM temperature rises to 212°F, compressor operation will stop immediately.  
Compressor operation restarts after 3 minutes the temperature decreases to 203°F.  
DC Peak Current Control  
o
o
o
o
When electric current to IPM exceeds set value of 18.5A, the compressor will stop operate. Then, operation  
will restart after 3 minutes.  
If the set value exceeds again more than 30 seconds after the compressor starts, the operation will restart  
after 2 minutes.  
If the set value exceeds again within 30 seconds after the compressor starts, the operation will restart after 1  
minute. If this condition repeats continuously for 7 times, all indoor and outdoor relays will be cut off.  
Timer LED will be blinking (F99 is indicated).  
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12.4.2 S18NK, S22NK  
•
Overheating Prevention Control  
o
o
When the IPM temperature rises to 212°F, compressor operation will stop immediately.  
Compressor operation restarts after 3 minutes the temperature decreases to 203°F.  
•
DC Peak Current Control  
o
o
o
When electric current to IPM exceeds set value of 29.9A, the compressor will stop operate. Then, operation  
will restart after 3 minutes.  
If the set value is exceeded again more than 30 seconds after the compressor starts, the operation will  
restart after 2 minute.  
If the set value is exceeded again within 30 seconds after the compressor starts, the operation will restart  
after 1 minute. If this condition repeats continuously for 7 times, all indoor and outdoor relays will be cut off.  
12.5 Compressor Overheating Prevention Control (For S18, S22NK only)  
•
Instructed frequency for compressor operation will be regulated by compressor discharge temperature. The  
changes of frequency are as below.  
•
If compressor discharge temperature exceeds 233.6°F, compressor will be stopped, occurs 4 times per 20  
minutes, timer LED will be blinking. “F97” is indicated.  
12.6 Low Pressure Protection Control (Gas Leakage Detection)  
•
Control start conditions  
o
For 5 minutes, the compressor continously operates and outdoor total current is between 0.66A and 1.25A  
(S9NK and S12NK) or 0.81A and 1.23A (S18NK and S22NK).  
o
During Cooling and Soft Dry operation:  
Indoor suction temperature – indoor piping temperature is below 39.2°F  
•
Control contents  
o
o
Compressor stops (and restart after 3 minutes).  
If the conditions above happened 2 times within 20 minutes, the unit will:  
ƒ
ƒ
Stop operation  
Timer LED blinks and “F91” indicated.  
12.7 Low Frequency Protection Control 1  
•
When the compressor operates at frequency lower than 26Hz continued for 20 minutes, the operation frequency  
will be changed to 25Hz for 2 minutes. (For S9NK and S12NK)  
•
When the compressor operates at frequency lower than 25Hz continued for 240 minutes, the operation frequency  
will be change to 24Hz for 2 minutes. (For S18NK and S22NK)  
12.8 Low Frequency Protection Control 2  
•
When all below conditions comply, minimum limit of compressor frequency will be set.  
Cooling / Soft Dry  
Temperature, T, for:  
S9NK and S12NK  
T < 59 or T ≥ 86  
T < 60.8 or T ≥ 100.4  
T < 86  
S18NK and S22NK  
T < 57.2 or ≥ 86  
T < 55.4 or T ≥ 100.4  
T < 86  
Indoor intake air (°F)  
Outdoor air (°F)  
Indoor heat exchanger (°F)  
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12.9 Outdoor Air Temperature Control  
•
The compressor operating frequency is regulated in accordance to the outdoor air temperature as shown in the  
diagram below.  
•
•
This control will begin 1 minute after the compressor starts.  
Compressor frequency will adjust based on outdoor air temperature.  
Free  
100.4°F or 77°F (For S18/22NK)  
98.6°F or 71.6°F (For S18/22NK)  
Limited Frequency  
Outdoor air temperature  
12.10 Cooling Overload Control  
•
Pipe temperature limitation / restriction.  
o
o
o
Detects the outdoor pipe temperature and carry out restriction / limitation below (Limit the compressor  
operation frequency)  
The compressor stops if outdoor pipe temperature exceeds 141.8°F (for S9NK and S12NK), 145.4°F (for  
S18NK and S22NK).  
If the compressor stops 4 times in 20 minutes, Timer LED blinks (“F95” indicated: Outdoor high pressure rise  
protection)  
12.11 Freeze Prevention Control  
•
When indoor heat exchanger temperature is lower than 32°F continuously for 6 minutes, compressor will stops  
operation.  
•
•
•
Compressor will resume its operation 3 minutes after the indoor heat exchanger is higher than 55.4°F.  
At the same time, indoor fan speed will be higher than during its normal operation.  
If the indoor heat exchanger temperature is higher than 55.4°F for 5 minutes, the fan speed will return to its  
normal operation.  
12.12 Freeze Prevention Control 2  
•
Control start conditions  
o
During Cooling operation and soft dry operation  
ƒ
ƒ
During thermo OFF condition, indoor intake temperature is less than 50°F or  
Compressor stops for freeze prevention control  
o
Either one of the conditions above occurs 5 times in 60 minutes.  
•
Control contents  
o
o
Operation stops  
Timer LED blinks and “H99” indicated  
12.13 Dew Prevention Control  
•
•
To prevent dew formation at indoor unit discharge area.  
This control will be activated if:  
o
o
o
o
o
Cooling mode or Quiet mode is activated.  
Remote control setting temperature is less than 77°F.  
Fan Speed is at CLo or QLo.  
Room temperature is constant (±33.8°F) for 30 minutes.  
Compressor is continuously running.  
•
Fan speed will be adjusted accordingly in this control.  
o
Fan speed will be increased slowly if the unit is in quiet mode but no change in normal cooling mode.  
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13. Servicing Mode  
13.1 Auto Off/On Button  
Auto OFF/ON  
Auto OFF/ON  
Button Pressed  
Button Pressed  
5 sec  
Test Run Operation  
(Forced Cooling Operation)  
Auto Operation  
Stop  
1
2
AUTO OPERATION MODE  
The Auto Operation will be activated immediately once the Auto OFF/ON button is pressed. This operation  
can be used to operate air conditioner with limited function if remote control is misplaced or malfunction.  
TEST RUN OPERATION (FOR PUMP DOWN/SERVICING PURPOSE)  
The Test Run Operation will be activated if the Auto OFF/ON button is pressed continuously for more than 5  
seconds. A “beep” sound will be heard at the fifth seconds, in order to identify the starting of this operation.  
The Auto OFF/ON button may be used together with remote control to set / change the advance setting of air  
conditioner operation.  
3
REMOTE CONTROL NUMBER SWITCH MODE  
The Remote Control Number Switch Mode will be activated if the Auto OFF/ON button is pressed  
continuously for more than 11 seconds (3 “beep” sounds will occur at 11th seconds to identify the Remote  
Control Number Switch Mode is in standby condition), press “AC Reset” button and then press any button at  
remote control to transmit and store the desired transmission code to the EEPROM.  
There are 4 types of remote control transmission code could be selected. The indoor unit will only operate  
when received signal with same transmission code from remote control. This could prevent signal  
interference when there are 2 or more units installed nearby together.  
To change remote control transmission code, short or open jumpers at the remote control printed circuit  
board.  
Remote Control Printed Circuit Board  
Jumper A (J-A)  
Short  
Jumper B (J-B)  
Open  
Remote Control No.  
A (Default)  
Open  
Short  
Open  
Short  
B
C
Open  
Short  
D
4
REMOTE CONTROL RECEIVING SOUND OFF/ON MODE  
The Remote Control Receiving Sound OFF/ON Mode will be activated if the Auto OFF/ON button is pressed  
continuously for more than 16 seconds (4 “beep” sounds will occur at 16th seconds to identify the Remote  
Control Receiving Sound OFF/ON Mode is in standby condition) and press “AC Reset” button and then press  
“Check” button at remote control.  
Press Auto OFF/ON button to toggle remote control receiving sound.  
- Short “beep”: Turn ON remote control receiving sound.  
- Long “beep”: Turn OFF remote control receiving sound.  
After Auto OFF/ON button is pressed, the 20 seconds counter for Remote Control Receiving Sound OFF/ON  
Mode is restarted.  
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13.2 Remote Control Button  
13.2.1 SET Button  
•
To check remote control transmission code and store the transmission code to EEPROM  
o
o
Press “Set” button continuously for 10 seconds by using pointer  
Press “Timer Set” button unit a “beep” sound is heard as confirmation of transmission code change.  
13.2.2 RESET (RC)  
•
To clear and restore the remote control setting to factory default.  
Press once to clear the memory  
o
13.2.3 RESET (AC)  
•
To restore the unit’s setting to factory default.  
Press once to restore the unit’s setting  
o
13.2.4 TIMER ▲  
•
To change indoor unit indicators’ intensity:  
Press continuously for 5 seconds.  
o
13.2.5 TIMER ▼  
•
To change remote control display from Degree Celsius (°C) to Degree Fahrenheit (°F)  
Press continuously for 10 seconds.  
o
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14. Troubleshooting Guide  
14.1 Refrigeration Cycle System  
Normal Pressure and Outlet Air Temperature (Standard)  
In order to diagnose malfunctions, ensure the air conditioner is free  
from electrical problems before inspecting the refrigeration cycle.  
Such problems include insufficient insulation, problem with the  
power source, malfunction of a compressor and a fan. The normal  
outlet air temperature and pressure of the refrigeration cycle  
depends on various conditions, the standard values for them are  
shown in the table to the right.  
Gas Pressure  
PSI  
Outlet air  
Temperature  
(°F)  
(kg/cm2G)  
130.5 ~ 174.0  
(9 ~ 12)  
Cooling Mode  
53.6 ~ 60.8  
Condition: Indoor fan speed = High  
Outdoor temperature = 95°F at cooling mode.  
Compressor operate at rated frequency  
Different in the intake  
•
Measuring the air  
temperature different  
and outlet  
air temperatures  
Normal  
More than 46.4°F  
(15 minutes after an  
operation is started) at  
cooling mode.  
Less than 46.4°F at the cooling mode  
Higher than specified  
•
Measuring electric current  
during operation  
Value of electric current  
during operation  
Dusty condenser  
preventing heat radiation  
Excessive amount  
of refrigerant  
Lower than specified  
Cooling  
Mode  
High  
Low  
Gas side  
pressure  
•
Measuring gas side  
pressure  
Inefficient compressor  
Insufficient refrigerant  
Low  
Clogged strainer or  
capillary cube  
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14.1.1 Relationship between the condition of the air conditioner and pressure and  
electric current  
Cooling Mode  
High Pressure  
Condition of the  
air conditioner  
Low Pressure  
Electric current during operation  
Insufficient refrigerant  
(gas leakage)  
Ô
Ô
Ô
Ô
Ò
Ô
Ô
Clogged capillary tube or  
strainer  
Ô
Ô
Ò
Ò
Ô
Ô
Ò
Ô
Short circuit in the indoor unit  
Heat radiation deficiency  
of the outdoor unit  
Inefficient compression  
• Carry out the measurement of pressure, electric current, and temperature fifteen minutes after an operation is started.  
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14.2 Breakdown Self Diagnosis Function  
14.2.1 Self Diagnosis Function (Three Digits Alphanumeric Code)  
•
•
Once error occurred during operation, the unit will stop its operation, and Timer LED blinks.  
Although Timer LED goes off when power supply is turned off, if the unit is operated under a breakdown  
condition, the LED will ON again.  
•
In operation after breakdown repair, the Timer LED will not blink. The last error code (abnormality) will be stored  
in IC memory.  
14.2.2 To Make a Diagnosis  
1
2
3
Timer LED starts to blink and the unit automatically stops the  
operation.  
Press the CHECK button on the remote control continuously for 5  
seconds.  
“- -“ will be displayed on the remote control display.  
Note: Display only for “- -“ (No signal transmission, no receiving  
sound and no Power LED blinking)  
4
Press the TIMER ▲ or ▼ button on the remote control. The code  
“H00” (no abnormality) will be displayed and signal will be transmit to  
the main unit.  
5
6
Each press of the button (▲ or ▼) will increase error code number  
and transmit error code signal to the main unit.  
When the latest abnormality code on the main unit and code  
transmitted from the remote control are matched, Power LED will  
light up for 30 seconds and a “beep” sound (continuously for 4  
seconds) will be heard. If no codes are matched, Power LED will light up for 0.5 seconds and no sound will  
be heard.  
7
8
The breakdown diagnosis mode will be canceled unless pressing the CHECK button continuously for 5  
seconds or operating the unit for 30 seconds.  
The LED will be off if the unit is turned off or the RESET button on the main unit is pressed.  
14.2.3 To Display Memorized Error Code (Protective Operation)  
1
2
3
Turn power on.  
Press the CHECK button on the remote control  
“- -“ will be displayed on the remote control display.  
Note: Display only for “- -“ (No signal transmission, no receiving sound and no Power LED blinking)  
Press the TIMER ▲ or ▼ button on the remote control. The code “H00” (no abnormality) will be displayed  
and signal will be transmit to the main unit.  
Each press of the button (▲ or ▼) will increase error code number and transmit error code signal to the main  
unit.  
When the latest abnormality code on the main unit and code transmitted from the remote control are matched,  
Power LED will light up for 30 seconds and a “beep” sound (continuously for 4 seconds) will be heard. If no  
codes are matched, Power LED will light up for 0.5 seconds and no sound will be heard.  
The breakdown diagnosis mode will be canceled unless pressing the CHECK button continuously for 5  
seconds or operating the unit for 30 seconds.  
4
5
6
7
8
The same diagnosis can be repeated by turning power on again.  
14.2.4 To Clear Memorized Error Code after Repair (Protective Operation)  
1
2
Turn power on (in standby condition).  
Press the AUTO button for 5 seconds (a “beep” sound is heard) on the main unit to operate the unit at  
Forced Cooling Operation Mode.  
3
Press the CHECK button on the remote control for about 1 second with a pointed object to transmit signal to  
main unit. A “beep” sound is heard, and the Error Code is cleared.  
14.2.5 Temporary Operation (Depending On Breakdown Status)  
1
Press the Auto OFF/ON button on the main unit (a “beep” sound is heard) to operate the unit. (Remote  
control is enable again).  
2
The unit can be temporarily be used until repaired.  
Error Code  
H23  
Operation  
Cooling  
Cooling  
Temporary items  
Emergency Operation  
with limited power  
H27, H28  
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14.3 Error Code Table  
Diagnosis  
Emergency  
Operation  
Abnormality / Protection control  
Abnormality Judgment  
Primary location to verify  
display  
H00  
No abnormality detected  
Indoor / Outdoor abnormal  
communication  
-
Normal operation  
Indoor fan operation  
only  
> 1 min after starting  
operation  
Continuously for 90 sec  
after power supplied  
•
•
Internal / external cable connection  
Indoor / outdoor PCB  
H11  
H12  
H14  
H15  
H16  
H19  
H23  
H27  
Connection capability rank abnormality  
-
-
-
-
-
Indoor intake air temperature sensor  
abnormality  
Outdoor compressor temperature sensor  
abnormality  
•
Intake air temperature sensor  
(defective or disconnected)  
Compressor temperature sensor  
(defective or disconnected)  
Outdoor PCB  
IPM (Power transistor) module  
Indoor PCB  
Continue for 5 sec.  
•
Continue for 5 sec.  
-
•
•
•
•
•
Outdoor current transformer open circuit  
Indoor fan motor mechanism locked  
7 occurrences  
continuously  
-
Fan motor  
Indoor heat exchanger temperature  
sensor abnormality  
Outdoor air temperature sensor  
abnormality  
○
Heat exchanger temperature sensor  
(defective or disconnected)  
Outdoor temperature sensor  
(defective or disconnected)  
Outdoor heat exchanger  
temperature sensor (defective or  
disconnected)  
Continue for 5 sec.  
Continue for 5 sec.  
○
○
•
•
Outdoor heat exchanger temperature  
sensor abnormality  
H28  
Continue for 5 sec.  
Discharge temperature sensor  
abnormality  
Indoor / outdoor wrong connection  
Indoor / outdoor mismatch (brand code)  
Outdoor high pressure sensor  
abnormality  
•
Outdoor discharge temperature  
sensor (defective or disconnected)  
Indoor / outdoor supply voltage  
H30  
Continue for 5 sec.  
H33  
H38  
-
-
-
-
•
-
•
•
High pressure sensor  
Lead wire and connector  
H64  
H97  
H98  
H99  
F11  
Continue for 1 minutes  
-
Outdoor fan lock abnormality  
2 occurrences within 30  
minutes  
•
Outdoor fan motor locked  
•
•
•
•
•
•
•
Air filter dirty  
Indoor temperature rise abnormality  
-
-
-
-
-
Air circulation short circuit  
Insufficient refrigerant  
Air filter dirty  
4-way valve  
v-coil  
Indoor heat exchanger freeze prevention  
protection  
4 occurrences within 30  
minutes  
4 way valve switching failure *  
Check indoor/outdoor connection  
wire and pipe  
3 times happen within  
40 minutes  
•
•
Indoor heat exchanger sensor lead  
wire and connector  
Expansion valve lead wire and  
connector.  
F17  
Indoor standby units freezing abnormality  
-
System and compressor microcomputer  
communication error(for S10*** only)  
2 occurrences within 5  
seconds  
4 occurrences within 20  
minutes  
2 occurrences within 20  
minutes  
4 occurrences within 20  
minutes  
•
•
Compressor  
Outdoor PCB  
F90  
F90  
F91  
F93  
F95  
-
-
-
-
-
Power factor correction abnormality  
Refrigerant cycle abnormal  
•
•
Outdoor PCB  
No refrigerant ( 3-way valve is  
closed)  
Outdoor compressor abnormal revolution  
Cooling high pressure protection  
•
•
Outdoor compressor  
4 occurrences within 20  
minutes  
Outdoor refrigerant circuit  
•
•
•
•
•
•
•
•
•
•
Excess refrigerant  
Improper heat radiation  
IPM (Power transistor)  
Insufficient refrigerant  
Compressor  
Excess refrigerant  
Improper heat radiation  
Outdoor PCB  
Intelligent power transistor overheating  
protection  
F96  
-
-
Compressor temperature rise protection 4 times occurrence within  
control  
F97  
F98  
-
-
20 minutes  
3 times occurrence within  
20 minutes  
Total running current protection  
Outdoor direct current (DC) peak  
detection  
7 times occurrence  
continuously  
F99  
-
IPM (Power transistor)  
Compressor  
Note:  
“○” – Frequency measured and fan speed fixed  
“ * ”– For cooling only model, it is the indication when indoor heat exchanger sensor or indoor air intake sensor has  
abnormality.  
The memory data of error code is erased when the power supply is cut off, or press the Auto Switch until “beep”  
sound heard following by pressing the CHECK button at remote control.  
Although operation forced to stop when abnormality detected, emergency operation is possible for certain errors  
(refer to Error Code Table) by using remote control or Auto OFF/ON button at indoor unit. However, the remote  
control signal receiving sound is changed from one “beep” to four “beep” sounds.  
60  
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14.4 Troubleshooting Flowchart  
14.4.1 H11 (Indoor/Outdoor Abnormal Communication)  
Malfunction Decision Conditions  
•
During startup and operation of cooling and heating, the data received from outdoor unit in indoor unit signal  
transmission is checked whether it is normal.  
Malfunction Caused  
•
•
•
•
Faulty indoor unit PCB.  
Faulty outdoor unit PCB.  
Indoor unit-outdoor unit signal transmission error due to wrong wiring.  
Indoor unit-outdoor unit signal transmission error due to breaking of wire in the connection wires between the  
indoor and outdoor units.  
•
Indoor unit-outdoor unit signal transmission error due to disturbed power supply waveform.  
Troubleshooting  
61  
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14.4.2 H12 (Indoor/Outdoor Capacity Rank Mismatched)  
Malfunction Decision Conditions  
•
During startup, error code appears when different types of indoor and outdoor units are interconnected.  
Malfunction Caused  
•
•
•
•
•
Wrong models interconnected.  
Wrong indoor unit or outdoor unit PCBs mounted.  
Indoor unit or outdoor unit PCBs defective.  
Indoor-outdoor unit signal transmission error due to wrong wiring.  
Indoor-outdoor unit signal transmission error due to breaking of wire 3 in the connection wires between the indoor  
and outdoor units.  
Troubleshooting  
62  
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14.4.3 H14 (Indoor Intake Air Temperature Sensor Abnormality)  
Malfunction Decision Conditions  
•
During startup and operation of cooling and heating, the temperatures detected by the indoor intake air  
temperature sensor are used to determine sensor errors.  
Malfunction Caused  
•
•
•
Faulty connector connection.  
Faulty sensor.  
Faulty PCB.  
Troubleshooting  
63  
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14.4.4 H15 (Compressor Temperature Sensor Abnormality)  
Malfunction Decision Conditions  
•
During startup and operation of cooling and heating, the temperatures detected by the outdoor compressor  
temperature sensor are used to determine sensor errors.  
Malfunction Caused  
•
•
•
Faulty connector connection.  
Faulty sensor.  
Faulty PCB.  
Troubleshooting  
64  
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14.4.5 H16 (Outdoor Current Transformer Open Circuit)  
Malfunction Decision Conditions  
•
A current transformer (CT) is detected by checking the compressor running frequency (≥ rated frequency) and  
CT detected input current (less than 1.14A) for continuously 20 seconds.  
Malfunction Caused  
•
•
•
CT defective  
Outdoor PCB defective  
Compressor defective (low compression)  
Troubleshooting  
65  
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14.4.6 H19 (Indoor Fan Motor – DC Motor Mechanism Locked)  
Malfunction Decision Conditions  
•
The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor  
(feedback of rotation > 2550rpm or < 50rpm)  
Malfunction Caused  
•
•
•
•
•
Operation stops due to short circuit inside the fan motor winding.  
Operation stops due to breaking of wire inside the fan motor.  
Operation stops due to breaking of fan motor lead wires.  
Operation stops due to Hall IC malfunction.  
Operation error due to faulty indoor unit PCB.  
Troubleshooting  
66  
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14.4.7 H23 (Indoor Pipe Temperature Sensor Abnormality)  
Malfunction Decision Conditions  
•
During startup and operation of cooling and heating, the temperatures detected by the indoor heat exchanger  
temperature sensor are used to determine sensor errors.  
Malfunction Caused  
•
•
•
Faulty connector connection.  
Faulty sensor.  
Faulty PCB.  
Troubleshooting  
67  
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14.4.8 H27 (Outdoor Air Temperature Sensor Abnormality)  
Malfunction Decision Conditions  
•
During startup and operation of cooling and heating, the temperatures detected by the outdoor air temperature  
sensor are used to determine sensor errors.  
Malfunction Caused  
•
•
•
Faulty connector connection.  
Faulty sensor.  
Faulty PCB.  
Troubleshooting  
68  
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14.4.9  
H28 (Outdoor Pipe Temperature Sensor Abnormality)  
Malfunction Decision Conditions  
•
During startup and operation of cooling and heating, the temperatures detected by the outdoor pipe temperature  
sensor are used to determine sensor errors.  
Malfunction Caused  
•
•
•
Faulty connector connection.  
Faulty sensor.  
Faulty PCB.  
Troubleshooting  
69  
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14.4.10 H30 (Compressor Discharge Temperature Sensor Abnormality)  
Malfunction Decision Conditions  
•
During startup and operation of cooling and heating, the temperatures detected by the outdoor discharge pipe  
temperature sensor are used to determine sensor errors.  
Malfunction Caused  
•
•
•
Faulty connector connection.  
Faulty sensor.  
Faulty PCB.  
Troubleshooting  
70  
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14.4.11 H33 (Unspecified Voltage between Indoor and Outdoor)  
Malfunction Decision Conditions  
•
The supply power is detected for its requirement by the indoor/outdoor transmission.  
Malfunction Caused  
•
•
•
Wrong models interconnected.  
Wrong indoor unit and outdoor unit PCBs used.  
Indoor unit or outdoor unit PCB defective.  
Troubleshooting  
71  
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14.4.12 H97 (Outdoor Fan Motor – DC Motor Mechanism Locked)  
Malfunction Decision Conditions  
•
The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor.  
Malfunction Caused  
•
•
•
•
•
Operation stops due to short circuit inside the fan motor winding.  
Operation stops due to breaking of wire inside the fan motor.  
Operation stops due to breaking of fan motor lead wires.  
Operation stops due to Hall IC malfunction.  
Operation error due to faulty outdoor unit PCB.  
Troubleshooting  
72  
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14.4.13 H98 (Indoor High Pressure Protection)  
Error Code will not display (no Timer LED blinking) but store in EEPROM  
Malfunction Decision Conditions  
•
During heating operation, the temperature detected by the indoor pipe temperature sensor is above 140°F.  
Malfunction Caused  
•
•
•
•
•
Clogged air filter of the indoor unit  
Dust accumulation on the indoor unit heat exchanger  
Air short circuit  
Detection error due to faulty indoor pipe temperature sensor  
Detection error due to faulty indoor unit PCB  
Troubleshooting  
73  
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14.4.14 H99 (Indoor Freeze Prevention Protection: Cooling or Soft Dry)  
Malfunction Decision Conditions  
•
Freeze prevention control takes place (when indoor pipe temperature is lower than 35.6°F)  
Malfunction Caused  
•
•
•
•
•
Clogged air filter of the indoor unit  
Dust accumulation on the indoor unit heat exchanger  
Air short circuit  
Detection error due to faulty indoor pipe temperature sensor  
Detection error due to faulty indoor unit PCB  
Troubleshooting  
74  
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14.4.15 F11 (Indoor Pipe Temperature Sensor Abnormality)  
Malfunction Decision Conditions  
•
When cooling operation, when indoor pipe temperature or indoor heat exchanger temperature sensor is above  
113°F.  
Malfunction Caused  
•
•
•
Faulty connector connection.  
Faulty indoor pipe temperature sensor.  
Faulty indoor main PCB.  
Troubleshooting  
75  
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14.4.16 F90 (Power Factor Correction Protection)  
Malfunction Decision Conditions  
•
During startup and operation of cooling and heating, when Power Factor Correction (PFC) protection circuitry at  
the outdoor unit main PCB senses abnormal high DC voltage level.  
Malfunction Caused  
•
•
•
DC voltage peak due to power supply surge.  
DC voltage peak due to compressor windings not uniform.  
Faulty outdoor PCB.  
Troubleshooting  
76  
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14.4.17 F91 (Refrigeration Cycle Abnormality)  
Malfunction Decision Conditions  
•
•
•
During cooling, compressor frequency = Fcmax.  
During cooling and heating operation, running current: 0.65A < I < 1.65A.  
During cooling, indoor intake - indoor pipe < 39.2°F.  
Malfunction Caused  
•
•
•
•
Refrigerant shortage (refrigerant leakage)  
Poor compression performance of compressor.  
2/3 way valve closed.  
Detection error due to faulty indoor intake air or indoor pipe temperature sensors.  
Troubleshooting  
77  
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14.4.18 F93 (Compressor Rotation Failure)  
Malfunction Decision Conditions  
A compressor rotation failure is detected by checking the compressor running condition through the position  
detection circuit.  
Malfunction Caused  
•
•
Compressor terminal disconnect  
Outdoor PCB malfunction  
Troubleshooting  
78  
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14.4.19 F95 (Cooling High Pressure Abnormality)  
Malfunction Decision Conditions  
During operation of cooling, when outdoor unit heat exchanger high temperature data (141.8°F) is detected by the  
outdoor pipe temperature sensor.  
Malfunction Caused  
•
•
•
•
Outdoor pipe temperature rise due to short circuit of hot discharge air flow.  
Outdoor pipe temperature rise due to defective of outdoor fan motor.  
Outdoor pipe temperature rise due to defective outdoor pipe temperature sensor.  
Outdoor pipe temperature rise due to defective outdoor unit PCB.  
Troubleshooting  
79  
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14.4.20 F96 (IPM Overheating)  
Malfunction Decision Conditions  
During operating of cooling and heating, when IPM temperature data (212°F) is detected by the IPM temperature  
sensor.  
Malfunction Caused  
•
•
•
•
IPM overheats due to short circuit of hot discharge air flow.  
IPM overheats due to defective of outdoor fan motor.  
IPM overheats due to defective of internal circuitry of IPM.  
IPM overheats due to defective IPM temperature sensor.  
Troubleshooting  
80  
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14.4.21 F97 (Compressor Overheating)  
Malfunction Decision Conditions  
During operation of cooling and heating, when compressor tank temperature data (233.6°F) is detected by the  
compressor tank temperature sensor.  
Malfunction Caused  
•
•
•
Refrigerant shortage (refrigerant leakage).  
2/3 way valve closed.  
Detection error due to faulty compressor tank temperature sensor.  
Troubleshooting  
81  
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14.4.22 F98 (Input Over Current Detection)  
Malfunction Decision Conditions  
During cooling and heating operation, when an input over-current (16.8A) is detected by checking the input current  
value being detected by current transformer (CT) with the compressor running.  
Malfunction Caused  
•
•
•
•
Over-current due to compressor failure.  
Over-current due to defective outdoor unit PCB.  
Over-current due to defective inverter main circuit electrolytic capacitor.  
Over-current due to excessive refrigerant.  
Troubleshooting  
82  
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14.4.23 F99 (Output Over Current Detection)  
Malfunction Decision Conditions  
During operation of cooling and heating, when an output over-current (18.5A) is detected by checking the current that  
flows in the inverter DC peak sensing circuitry.  
Malfunction Caused  
•
•
•
DC peak due to compressor failure.  
DC peak due to defective power transistor(s).  
DC peak due to defective outdoor unit PCB.  
Troubleshooting  
•
•
•
Checking the power transistor  
Never touch any live parts for at least 10 minutes after turning off the circuit breaker.  
If unavoidable necessary to touch a live part, make sure the power transistor’s supply voltage is below 50V using  
the tester.  
•
For the UVW, make measurement at the Faston terminal on the board of the relay connector.  
Tester’s negative terminal  
Tester’s positive terminal  
Normal resistance  
Power transistor (+)  
UVW  
UVW  
Power transistor (-)  
UVW  
UVW  
Power transistor (-)  
Power transistor (+)  
Several kΩ to several MΩ  
0 or ∞  
Abnormal resistance  
83  
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15. Disassembly and Assembly Instructions  
WARNING  
High Voltage is generated in the electrical parts area by the capacitor. Ensure that the capacitor has discharged sufficiently before proceeding with  
repair work. Failure to heed this caution may result in electric shocks.  
15.1 Indoor Electronic Controllers, Cross Flow Fan and Indoor Fan Motor  
Removal Procedures  
15.1.1 To remove front grille  
15.1.1.1 To remove power electronic controller  
84  
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15.1.1.2 To remove discharge grille  
85  
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15.1.1.3 To remove control board  
15.1.1.4 To remove cross flow fan and indoor fan motor  
86  
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87  
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16. Technical Data  
16.1 Operation Characteristics  
16.1.1 CS-S9NKUW-1 CU-S9NKU-1  
•
Cooling Characteristic  
o
o
o
o
Room temperature:  
Operation condition:  
Piping length:  
81°F (DBT), 66°F (WBT)  
High fan speed  
24.6ft  
Fc  
Compressor Freq:  
88  
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•
Piping Length Characteristic  
o
o
o
o
Room temperature:  
Operation condition:  
Outdoor temperature: 95°F (DBT)  
Compressor Freq: Fc  
81°F (DBT), 66°F (WBT)  
High fan speed  
89  
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16.1.2 CS-S12NKUW-1 CU-S12NKU-1  
•
Cooling Characteristic  
o
o
o
o
Room temperature:  
Operation condition:  
Piping length:  
81°F (DBT), 66°F (WBT)  
High fan speed  
24.6ft  
Fc  
Compressor Freq:  
90  
Download from Www.Somanuals.com. All Manuals Search And Download.  
•
Piping Length Characteristic  
o
o
o
o
Room temperature:  
Operation condition:  
Outdoor temperature: 95°F (DBT)  
Compressor Freq: Fc  
81°F (DBT), 66°F (WBT)  
High fan speed  
91  
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16.1.3 CS-S18NKU-1 CU-S18NKU-1  
•
Cooling Characteristic  
o
o
o
o
Room temperature:  
Operation condition:  
Piping length:  
81°F (DBT), 66°F (WBT)  
High fan speed  
16.4ft  
Fc  
Compressor Freq:  
92  
Download from Www.Somanuals.com. All Manuals Search And Download.  
•
Piping Length Characteristic  
o
o
o
o
Room temperature:  
Operation condition:  
Outdoor temperature: 95°F (DBT)  
Compressor Freq: Fc  
81°F (DBT), 66°F (WBT)  
High fan speed  
93  
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16.1.4 CS-S22NKU-1 CU-S22NKU-1  
•
Cooling Characteristic  
o
o
o
o
Room temperature:  
Operation condition:  
Piping length:  
81°F (DBT), 66°F (WBT)  
High fan speed  
16.4ft  
Fc  
Compressor Freq:  
94  
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•
Piping Length Characteristic  
o
o
o
o
Room temperature:  
Operation condition:  
Outdoor temperature: 95°F (DBT)  
Compressor Freq: Fc  
81°F (DBT), 66°F (WBT)  
High fan speed  
95  
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17. Exploded View and Replacement Parts List  
17.1 Indoor Unit  
17.1.1 CS-S9NKUW-1 CS-S12NKUW-1  
Note  
The above exploded view is for the purpose of parts disassembly and replacement.  
The non-numbered parts are not kept as standard service parts.  
96  
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REF. NO.  
1
PART NAME & DESCRIPTION  
CHASSIS COMPLETE  
QTY.  
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
11  
1
1
1
1
1
1
1
1
1
1
1
2
2
2
1
1
1
1
1
1
1
1
1
1
1
CS-S9NKUW-1  
CWD50C1633  
L6CBYYYL0055  
CWH02C1076  
CWH64K007  
CWH551146  
CWB30C3181  
CWT251030  
CWT251031  
CWH32143  
CS-S12NKUW-1  
REMARK  
←
2
FAN MOTOR  
←
O
3
CROSS-FLOW FAN COMPLETE  
BEARING ASSY  
←
4
←
5
SCREW - CROSS-FLOW FAN  
EVAPORATOR  
←
7
CWB30C3182  
8
FLARE NUT (LIQUID)  
←
9
FLARE NUT (GAS)  
CWT251032  
10  
12  
13  
14  
15  
17  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
33  
34  
35  
36  
37  
38  
39  
40  
41  
42  
43  
44  
45  
46  
48  
49  
50  
51  
52  
53  
CLIP FOR SENSOR  
←
CONTROL BOARD CASING  
TERMINAL BOARD COMPLETE  
ELECTRONIC CONTROLLER - MAIN  
ELECTRONIC CONTROLLER - POWER  
ELECTRONIC CONTROLLER - INDICATOR  
SENSOR COMPLETE  
CWH102370A  
CWA28C2357  
CWA73C6135  
CWA745811  
CWA745740  
CWA50C2135  
CWH131350  
CWD933021  
CWH13C1201  
CWE20C3038  
CWD933233B  
CWH621102  
CWE241287  
CWE261152  
CWE261154  
CWE261155  
CWE261153  
CWA981240  
CWH521096  
CWE24C1268  
CWA75C3580  
CWE11C4512  
CWE22C1507  
CWE14C1029  
CWD001279  
XTT4+16CFJ  
CWH521194  
CWH851173  
CWH361097  
CWH82C1705  
CWF568314  
CWF615165  
CWD00C1141  
CWD041144A  
CWG861497  
CWG712940  
CWG712941  
CWG565009  
←
←
O
O
O
O
O
CWA73C6136  
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
CONTROL BOARD TOP COVER  
INDICATOR HOLDER  
CONTROL BOARD FRONT COVER CO.  
DISCHARGE GRILLE COMPLETE  
BACK COVER CHASSIS  
FULCRUM  
VERTICAL VANE  
CONNECTING BAR  
CONNECTING BAR  
CONNECTING BAR  
CONNECTING BAR  
AIR SWING MOTOR  
O
CAP - DRAIN TRAY  
HORIZONTAL VANE COMPLETE  
REMOTE CONTROL COMPLETE  
FRONT GRILLE COMPLETE  
INTAKE GRILLE COMPLETE  
GRILLE DOOR COMPLETE  
AIR FILTER  
O
O
O
SCREW - FRONT GRILLE  
CAP - FRONT GRILLE  
DRAIN HOSE  
INSTALLATION PLATE  
BAG COMPLETE - INSTALLATION SCREW  
OPERATING INSTRUCTION  
INSTALLATION INSTRUCTION  
AIR PURIFYING FILTER  
WIRE NET  
BAG  
SHOCK ABSORBER (L)  
SHOCK ABSORBER (R)  
C.C.CASE  
(Note)  
•
•
All parts are supplied from PHAAM, Malaysia (Vendor Code: 00029488).  
“O” marked parts are recommended to be kept in stock.  
97  
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17.1.2 CS-S18NKU-1 CS-S22NKU-1  
Note  
The above exploded view is for the purpose of parts disassembly and replacement.  
The non-numbered parts are not kept as standard service parts.  
98  
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REF. NO.  
1
PART NAME & DESCRIPTION  
CHASSIS COMPLETE  
QTY.  
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
15  
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
3
3
1
1
1
1
1
1
1
1
1
1
1
CS-S18NKU-1  
CWD50C1637  
L6CBYYYL0056  
CWH02C1077  
CWH64K007  
CWH551146  
CWB30C3771  
CWT251030  
CWT251032  
CWH32143  
CS-S22NKU-1  
REMARK  
←
2
FAN MOTOR  
←
O
3
CROSS-FLOW FAN COMPLETE  
BEARING ASSY  
←
4
←
5
SCREW - CROSS-FLOW FAN  
EVAPORATOR  
←
7
CWB30C3772  
8
FLARE NUT (LIQUID)  
←
9
FLARE NUT (GAS)  
CWT251033  
11  
12  
13  
14  
15  
17  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
34  
35  
36  
37  
38  
39  
40  
41  
42  
43  
44  
45  
46  
47  
48  
49  
50  
51  
52  
53  
54  
CLIP FOR SENSOR  
←
CONTROL BOARD CASING  
TERMINAL BOARD COMPLETE  
ELECTRONIC CONTROLLER - MAIN  
ELECTRONIC CONTROLLER - POWER  
ELECTRONIC CONTROLLER - INDICATOR  
SENSOR COMPLETE  
CWH102370A  
CWA28C2357  
CWA73C6143  
CWA745811  
CWA745740  
CWA50C2135  
CWH131350  
CWD933021  
CWH13C1201  
CWE20C3049  
CWH621103  
CWE241289  
CWE261156  
CWE261158  
CWE261157  
CWE261159  
CWE261160  
CWA98K1014  
CWA981241  
CWH521096  
CWE24C1295  
CWD933031B  
CWA75C3582  
CWE11C4514  
CWE22C1483  
CWE14C1029  
CWD001283  
XTT4+16CFJ  
CWH521194  
CWH851173  
CWH361098  
CWH82C1705  
CWF568314  
CWF615166  
CWD041145A  
CWD00C1141  
CWG861498  
CWG713033  
CWG713034  
CWG565069  
←
←
O
O
O
O
O
CWA73C6144  
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
CONTROL BOARD TOP COVER  
INDICATOR HOLDER  
CONTROL BOARD FRONT COVER CO.  
DISCHARGE GRILLE COMPLETE  
FULCRUM  
VERTICAL VANE  
CONNECTING BAR  
CONNECTING BAR  
CONNECTING BAR  
CONNECTING BAR  
CONNECTING BAR  
AIR SWING MOTOR  
O
O
AIR SWING MOTOR  
CAP - DRAIN TRAY  
HORIZONTAL VANE COMPLETE  
BACK COVER CHASSIS  
REMOTE CONTROL COMPLETE  
FRONT GRILLE COMPLETE  
INTAKE GRILLE COMPLETE  
GRILLE DOOR COMPLETE  
AIR FILTER  
O
O
O
SCREW - FRONT GRILLE  
CAP - FRONT GRILLE  
DRAIN HOSE  
INSTALLATION PLATE  
BAG COMPLETE - INSTALLATION SCREW  
OPERATING INSTRUCTION  
INSTALLATION INSTRUCTION  
WIRE NET  
AIR PURIFYING FILTER  
BAG  
SHOCK ABSORBER (L)  
SHOCK ABSORBER (R)  
C.C.CASE  
(Note)  
•
•
All parts are supplied from PHAAM, Malaysia (Vendor Code: 00029488).  
“O” marked parts are recommended to be kept in stock.  
99  
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17.2 Outdoor Unit  
17.2.1 CU-S9NKU-1 CU-S12NKU-1  
Note  
The above exploded view is for the purpose of parts disassembly and replacement.  
The non-numbered parts are not kept as standard service parts.  
100  
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REF. NO. PART NAME & DESCRIPTION  
QTY.  
1
1
2
1
4
1
1
1
3
3
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
CU-S9NKU-1  
CWD50K2206A  
CWD541030  
CWH551217  
CWA951466  
CWH55406J  
CWH03K1010  
CWH56053J  
5RS102XBC01  
CWH50077  
CU-S12NKU-1  
REMARK  
1
2
CHASSIS ASSY  
←
FAN MOTOR BRACKET  
SCREW - FAN MOTOR BRACKET  
FAN MOTOR  
←
3
←
4
←
O
O
5
SCREW - FAN MOTOR MOUNT  
PROPELLER FAN ASSY  
NUT - PROPELLER FAN  
COMPRESSOR  
←
6
←
7
←
8
←
9
ANTI - VIBRATION BUSHING  
NUT - COMPRESSOR MOUNT  
CONDENSER  
←
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
21A  
21B  
22  
23  
24  
26  
27  
28  
29  
30  
31  
32  
33  
36  
37  
38  
39  
40  
41  
42  
43  
CWH56000J  
CWB32C3010  
CWT01C4383  
CWB121010  
CWH351015A  
CWB021301  
CWB011374  
CWH171039A  
CWH7080300J  
CWH151172A  
CWG302314  
CWG302563  
CWG302315  
CWG302316  
CWA50C2340  
CWH131264  
CWA73C6151R  
CWA28K1154  
CWE04C1226  
CWA50C2670  
CWE041492A  
CWE06C1142  
CWE031018A  
CWH131301  
CWH13C1208  
CWA421050  
CWB001058  
CWD041111A  
CWG861078  
CWG50C2388  
CWG712209  
CWG712210  
CWG565107  
←
←
TUBE ASSY CO. (CAP./CHK VALVE)  
DISCHARGE MUFFLER (EXP VALVE)  
HOLDER COUPLING  
CWT01C4384  
←
←
2-WAYS VALVE (LIQUID)  
3-WAY VALVE (GAS)  
←
O
O
CWB011367  
TERMINAL COVER  
←
NUT - TERMINAL COVER  
SOUND PROOF BOARD  
SOUND PROOF MATERIAL  
SOUND PROOF MATERIAL  
SOUND PROOF MATERIAL  
SOUND PROOF MATERIAL  
SENSOR CO-COMP TEMP  
CONTROL BOARD COVER - TOP  
ELECTRONIC CONTROLLER - MAIN  
TERMINAL BOARD ASSY  
CABINET SIDE PLATE CO.  
SENSOR CO-AIR TEMP AND PIPE TEMP  
CABINET SIDE PLATE (L)  
CABINET FRONT PLATE CO.  
CABINET TOP PLATE  
←
←
←
←
←
←
←
O
←
CWA73C6152R  
O
O
←
←
←
O
←
←
←
PLATE - C. B. COVER TERMINAL  
CONTROL BOARD COVER CO.  
REACTOR  
←
←
G0A193M00001  
4-WAYS VALVE  
←
←
←
←
←
←
←
WIRE NET  
BAG  
BASE BOARD - COMPLETE  
SHOCK ABSORBER (RIGHT)  
SHOCK ABSORBER (LEFT)  
C.C.CASE  
(Note)  
•
•
All parts are supplied from PHAAM, Malaysia (Vendor Code: 00029488).  
“O” marked parts are recommended to be kept in stock.  
101  
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17.2.2 CU-S18NKU-1 CU-S22NKU-1  
Note  
The above exploded view is for the purpose of parts disassembly and replacement.  
The non-numbered parts are not kept as standard service parts.  
102  
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REF. NO. PART NAME & DESCRIPTION  
QTY.  
1
3
1
3
1
1
2
3
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
CU-S18NKU-1  
CWD52K1227A  
CWH50077  
CU-S22NKU-1  
REMARK  
1
CHASSIS ASSY  
←
2
ANTI - VIBRATION BUSHING  
COMPRESSOR  
←
3
5CS130XAD04  
CWH56000J  
CWD541126  
CWA951686  
CWH551217  
CWH551040J  
CWH001019  
CWH561038J  
CWB32C2864  
CWB051016J  
CWB141053  
CWB001057  
CWB111061  
CWH351056A  
CWB011338  
CWB021292  
CWH151225  
CWH171039A  
CWH7080300J  
CWA43C2393  
CWA50C2689  
CWA50C2710  
G0C153J00007  
CWH131333  
CWA28K1154  
CWA73C6155R  
CWH13C1210  
CWE041489A  
CWE161010  
CWE041487A  
CWE06K1069  
CWD041128A  
CWE031131A  
DS441305NPQA  
CWB131024  
CWG302302  
CWG302513  
CWG302503  
CWH131332  
CWG861154  
CWG62C1082  
CWG712879  
CWG712880  
CWG565614  
←
O
O
4
NUT - COMPRESSOR MOUNT  
FAN MOTOR BRACKET  
FAN MOTOR  
←
5
←
6
←
7
SCREW - FAN MOTOR BRACKET  
SCREW - FAN MOTOR MOUNT  
PROPELLER FAN ASSY  
NUT - PROPELLER FAN  
CONDENSER  
←
8
←
9
←
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
37  
38  
39  
40  
41  
42  
43  
44  
45  
46  
←
CWB32C2865  
EXPANSION VALVE  
←
RECEIVER  
-
4-WAYS VALVE  
←
STRAINER  
←
HOLDER COUPLING  
3-WAY VALVE (GAS)  
2-WAYS VALVE (LIQUID)  
SOUND PROOF BOARD  
TERMINAL COVER  
←
CWB011623  
O
O
←
←
←
NUT - TERMINAL COVER  
V-COIL COMPLETE  
←
←
SENSOR CO - COMP TEMP  
SENSOR CO - AIR TEMP AND PIPE TEMP  
REACTOR  
←
O
O
O
←
←
CONTROL BOARD COVER-TOP  
TERMINAL BOARD ASSY  
ELECTRONIC CONTROLLER - MAIN  
CONTROL BOARD COVER - COMPLETE  
CABINET SIDE PLATE  
HANDLE  
←
←
O
O
CWA73C6156R  
←
CWE041490A  
←
CABINET SIDE PLATE CO.  
CABINET FRONT PLATE CO.  
WIRE NET  
←
←
←
CABINET TOP PLATE  
CAPACITOR  
←
DS441355NPQA  
O
ACCUMLATOR  
←
SOUND PROOF MATERIAL  
SOUND PROOF MATERIAL  
SOUND PROOF MATERIAL  
PLATE - C. B. COVER TERMINAL  
BAG  
CWG302270  
CWG302300  
-
←
←
←
←
←
←
BASE BOARD - COMPLETE  
SHOCK ABSORBER (RIGHT)  
SHOCK ABSORBER (LEFT)  
C.C.CASE  
(Note)  
•
All parts are supplied from PHAAM, Malaysia (Vendor Code: 00029488).  
“O” marked parts are recommended to be kept in stock.  
Printed in Malaysia  
SB1011-00  
103  
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