Panasonic Air Conditioner Indoor Unit Outdoor Unit CS E9NKUAW CS E12NKUAW CU E9NKUA CU E12NKUA User Manual
Order No: PHAAM1111087C1  
Indoor Unit  
CS-E9NKUAW  
CS-E12NKUAW  
Outdoor Unit  
CU-E9NKUA  
CU-E12NKUA  
Please file and use this manual together with the service manual for Model No. CU-2E18NBU, Order No. PHAAM1111120A1.  
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.  
TABLE OF CONTENTS  
8.1  
8.2  
Indoor Unit..................................................14  
Outdoor Unit...............................................15  
1. Safety Precautions.............................................3  
2. Specification.......................................................5  
3. Features ..............................................................8  
4. Location of Controls and Components ...........9  
9. Electronic Circuit Diagram..............................16  
9.1  
9.2  
Indoor Unit..................................................16  
Outdoor Unit...............................................17  
10. Printed Circuit Board.......................................18  
4.1  
4.2  
4.3  
Indoor Unit....................................................9  
Outdoor Unit.................................................9  
Remote Control ............................................9  
10.1 Indoor Unit..................................................18  
10.2 Outdoor Unit...............................................20  
5. Dimensions.......................................................10  
11. Installation Instruction.....................................21  
5.1  
5.2  
Indoor Unit..................................................10  
Outdoor Unit...............................................11  
11.1 Select the Best Location ............................21  
11.2 Indoor Unit..................................................22  
11.3 Outdoor Unit...............................................26  
6. Refrigeration Cycle Diagram...........................12  
7. Block Diagram ..................................................13  
8. Wiring Connection Diagram............................14  
12. Operation Control.............................................29  
12.1 Basic Function............................................29  
12.2 Indoor Fan Motor Operation.......................30  
© Panasonic HA Air-Conditioning (M) Sdn. Bhd. 2011.  
Unauthorized copying and distribution is a violation of law.  
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1. Safety Precautions  
š
š
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.  
š
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  
CAUTION  
This indication shows the possibility of causing injury or damage to properties.  
š
š
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.  
4. 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.  
5. Install according to this installation instructions strictly. If installation is defective, it will cause water leakage, electric shock or fire.  
6. 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.  
7. 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.  
8. 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.  
9. 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.  
10. Do not use joint cable for indoor/outdoor connection cable. Use the specified indoor/outdoor connection cable, refer to installation 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.  
11. 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.  
12. 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.).  
13. 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.  
14. 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.  
15. Keep away from small children, the thin film may cling to nose and mouth and prevent breathing.  
16. 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.  
17. 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.  
18. 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.  
Thickness of copper pipes used with R410A must be more than 1/64". Never use copper pipes thinner than 1/64".  
It is desirable that the amount of residual oil is less than 0.0014 oz/32.8ft.  
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19. During installation, install the refrigerant piping properly before run the compressor. (Operation of compressor without fixing refrigeration piping  
and valves at opened condition will cause suck-in of air, abnormal high pressure in refrigeration cycle and result in explosion, injury etc.).  
20. During pump down operation, stop the compressor before remove the refrigeration piping. (Removal of refrigeration piping while 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.).  
21. 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.  
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  
1. 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.  
2. Carry out drainage piping as mentioned in installation instructions. If drainage is not perfect, water may enter the room and damage  
the furniture.  
3. 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.  
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.  
6. 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  
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).  
7. 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.  
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.  
8. 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.  
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 aluminium fins or edges of metal parts.  
If you are required to handle sharp parts during installation or servicing, please wear hand glove.  
Sharp parts may cause injury.  
4
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2. Specification  
Indoor  
CS-E9NKUAW  
CU-E9NKUA  
ARI  
CS-E12NKUAW  
CU-E12NKUA  
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.  
3.51  
230  
Mid.  
3.51  
Min.  
1.20  
Max.  
3.00  
Min.  
1.20  
Max.  
3.00  
Min.  
1.20  
Max.  
3.90  
Min.  
1.20  
Max.  
3.90  
kW  
Capacity  
BTU/h  
4100 8500 10200 4100 8500 10200 4100 12000 13300 4100 12000 13300  
Running Current  
Input Power  
A
-
3.5  
650  
3.83  
-
-
3.1  
650  
3.83  
-
-
5.2  
1.00k 1.15k  
3.51 3.39  
-
-
4.7  
1.00k 1.15k  
3.51 3.39  
-
W
250  
4.80  
850  
3.53  
250  
4.80  
850  
3.53  
250  
4.80  
250  
4.80  
W/W  
EER  
Btu/hW  
16.40 13.05 12.00 16.40 13.05 12.00 16.40 12.00 11.55 16.40 12.00 11.55  
Power Factor  
%
-
89  
-
-
91  
-
-
92  
-
-
93  
-
dB-A  
40 / 25 / 20  
56 / - / -  
47 / - / -  
62 / - / -  
3.27  
40 / 25 / 20  
56 / - / -  
47 / - / -  
62 / - / -  
3.27  
43 / 28 / 20  
59 / - / -  
48 / - / -  
63 / - / -  
4.05  
43 / 28 / 20  
59 / - / -  
48 / - / -  
63 / - / -  
4.05  
Indoor Noise (H / L / QLo)  
Power Level dB  
dB-A  
Outdoor Noise (H / L / QLo)  
Capacity  
Power Level dB  
kW  
1.20  
4.14  
1.20  
4.14  
1.20  
4.77  
1.20  
4.77  
BTU/h  
4100 11200 14100 4100 11200 14100 4100 13800 16300 4100 13800 16300  
Running Current  
Input Power  
A
-
6.1  
1.15k 1.50k  
2.84 2.76  
-
-
5.4  
1.15k 1.50k  
2.84 2.76  
-
-
6.5  
1.30k 1.71k  
3.12 2.79  
-
-
5.8  
200 1.30K 1.71k  
6.00 3.12 2.79  
-
W
W/W  
200  
6.00  
200  
6.00  
200  
6.00  
COP  
Btu/hW  
%
20.50 9.70  
9.40 20.50 9.70  
9.40 20.50 10.60 9.50 20.50 10.60 9.50  
Power Factor  
-
91  
-
-
93  
-
-
96  
-
-
97  
-
dB-A  
42 / 29 / 26  
58 / - / -  
46 / - / -  
63 / - / -  
42 / 29 / 26  
58 / - / -  
48 / - / -  
63 / - / -  
44 / 35 / 32  
60 / - / -  
49 / - / -  
64 / - / -  
44 / 35 / 32  
60 / - / -  
49 / - / -  
64 / - / -  
Indoor Noise (H / L / QLo)  
Power Level dB  
dB-A  
Outdoor Noise (H / L / QLo)  
Power Level dB  
Max Current (A) / Max Input Power (W)  
Starting Current (A)  
Min Circuit Ampacity  
Max. Current Protection  
SEER / HSPF  
7.0 / 1.57k  
6.1  
7.8 / 1.71k  
6.5  
15.0  
15.0  
15.0  
15.0  
21.00 / 10.50  
20.00 / 10.00  
Type  
Hermetic Motor  
Brushless (4 poles)  
700  
Hermetic Motor  
Brushless (4 poles)  
700  
Compressor  
Motor Type  
Output Power  
W
Type  
Cross-flow fan  
ASG20K1  
Cross-flow fan  
ASG20K1  
Material  
Motor Type  
Input Power  
Output Power  
Transistor (8 poles)  
47.0 - 47.0  
Transistor (8 poles)  
47.0 - 47.0  
W
W
40  
40  
Cooling : 620  
Heating : 750  
Cooling : 720  
Heating : 850  
Cooling : 930  
Heating : 1070  
Cooling : 1150  
Heating : 1300  
Cooling : 1250  
Heating : 1390  
Cooling : 630  
Heating : 970  
Cooling : 790  
Heating : 1070  
Cooling : 1030  
Heating : 1250  
Cooling : 1270  
Heating : 1430  
Cooling : 1400  
Heating : 1500  
QLo  
rpm  
rpm  
rpm  
rpm  
rpm  
Lo  
Me  
Hi  
Speed  
SHi  
5
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Type  
Propeller  
Propeller  
Material  
PP  
DC (8 poles)  
-
PP  
DC (8 poles)  
-
Motor Type  
Input Power  
Output Power  
W
W
40  
40  
Speed  
Hi  
rpm  
C: 830 H: 780  
0.6 (1.3)  
C: 830 H: 780  
1.2 (2.5)  
Moisture Removal  
L/h (Pt/h)  
Cooling : 5.42 (191)  
Heating : 6.49 (229)  
Cooling : 6.51 (230)  
Heating : 7.53 (266)  
Cooling : 8.80 (311)  
Heating : 9.81 (346)  
Cooling : 11.2 (395)  
Heating : 12.2 (430)  
Cooling : 12.29 (434)  
Heating : 13.13 (464)  
Cooling : 31.0 (1095)  
Heating : 31.0 (1095)  
Cooling : 5.30 (187)  
Heating : 8.75 (309)  
Cooling : 6.98 (246)  
Heating : 9.78 (345)  
Cooling : 9.49 (335)  
Heating : 11.64 (411)  
Cooling : 12.0 (425)  
Heating : 13.5 (475)  
Cooling : 13.36 (472)  
Heating : 14.23 (502)  
Cooling : 31.0 (1095)  
Heating : 31.0 (1095)  
QLo  
Lo  
m3/min (ft3/min)  
m3/min (ft3/min)  
m3/min (ft3/min)  
m3/min (ft3/min)  
m3/min (ft3/min)  
m3/min (ft3/min)  
Indoor Airflow  
Me  
Hi  
SHi  
Hi  
Outdoor  
Airflow  
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  
FV50S (320)  
Capillary Tube  
FV50S (320)  
Refrigeration  
Cycle  
cm3  
g (oz)  
R410A, 965 (34.1)  
R410A, 980 (34.6)  
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)  
Standard length  
mm (inch)  
m (ft)  
6.35 (1/4) / 9.52 (3/8)  
6.35 (1/4) / 12.70 (1/2)  
7.5 (24.6)  
3 (9.8) ~ 20 (65.6)  
15 (49.2)  
7.5 (24.6)  
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)  
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)  
Aluminium (Pre Coat)  
Slit Fin  
650 (25-5/8)  
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 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 19-7/18 x 28-1/8  
26-7/8  
1-3/8 x 19-7/18 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  
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DRY BULB  
89.6  
WET BULB  
DRY BULB  
89.6  
WET BULB  
Maximum  
Minimum  
Maximum  
Minimum  
Maximum  
Minimum  
Maximum  
Minimum  
73.4  
51.8  
78.8  
-
73.4  
51.8  
78.8  
-
Indoor Operation Range  
(Cooling)  
60.8  
60.8  
109.4  
5.0  
109.4  
5.0  
Outdoor Operation Range  
(Cooling)  
86.0  
-
86.0  
-
Indoor Operation Range  
(Heating)  
60.8  
-
60.8  
-
75.2  
64.4  
3.2  
75.2  
64.4  
3.2  
Outdoor Operation Range  
(Heating)  
5.0  
5.0  
1. Cooling capacities are based on indoor temperature of 27°C DRY BULB (80.6°F DRY BULB), 19.0°C WET BULB (66°F WET BULB) and  
outdoor air temperature of 35°C DRY BULB (95°F DRY BULB), 24°C WET BULB (75.2°F WET BULB)  
2. Heating capacities are based on indoor temperature of 20°C Dry Bulb (68°F Dry Bulb) and outdoor air temperature of 7°C Dry Bulb (44.6°F  
Dry Bulb), 6°C Wet Bulb (42.8°F Wet Bulb)  
3. Specifications are subjected to change without prior notice for further improvement.  
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3. Features  
š
Inverter Technology  
o
o
o
o
Wider output power range  
Energy saving  
Quick Cooling  
More precise temperature control  
š
š
Environment Protection  
Non-ozone depletion substances refrigerant (R410A)  
o
Long Installation Piping  
CS/CU-E9/12NK, long piping up to 20 meters  
o
š
š
Easy to use remote control  
Quality Improvement  
o
o
o
o
o
Random auto restart after power failure for safety restart operation  
Gas leakage protection  
Prevent compressor reverse cycle  
Inner protector to protect Compressor  
Noise prevention during soft dry operation  
š
š
Operation Improvement  
o
Quiet mode to reduce the indoor unit operating sound  
o
Powerful mode to reach the desired room temperature quickly  
Serviceability Improvement  
Breakdown Self Diagnosis function  
o
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4. Location of Controls and Components  
4.1  
Indoor Unit  
4.2  
Outdoor Unit  
4.3  
Remote Control  
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5. Dimensions  
5.1  
Indoor Unit  
10  
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5.2  
Outdoor Unit  
11  
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6. Refrigeration Cycle Diagram  
12  
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7. Block Diagram  
13  
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8. Wiring Connection Diagram  
8.1  
Indoor Unit  
14  
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8.2  
Outdoor Unit  
15  
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9. Electronic Circuit Diagram  
9.1  
Indoor Unit  
16  
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9.2  
Outdoor Unit  
17  
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10. Printed Circuit Board  
10.1 Indoor Unit  
10.1.1  
Main Printed Circuit Board  
18  
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10.1.2  
Power Printed Circuit Board  
10.1.3  
Indicator Printed Circuit Board  
19  
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10.2 Outdoor Unit  
10.2.1  
Main Printed Circuit Board  
20  
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11. Installation Instruction  
11.1 Select the Best Location  
11.1.3  
Indoor/Outdoor Unit Installation  
Diagram  
11.1.1  
Indoor Unit  
š
š
š
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.  
š
š
š
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.  
š
š
Do not install the unit near the 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.  
š
11.1.2  
Outdoor Unit  
š
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.  
š
š
š
š
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.  
š
Recommended installation height for outdoor unit  
should be above the seasonal snow level.  
Example: For E9NKUAW  
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.  
21  
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11.2  
Indoor Unit  
11.2.1  
How to Fix Installation Plate  
The mounting wall shall be strong and solid enough to prevent if from the vibration.  
The center 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 ø2-3/4" hole-core drill.  
o
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 5-1/6" for left and right hole  
respectively.  
Drill the piping hole at either the right or the left and the hole should be slightly slanting to the outdoor  
side.  
11.2.2  
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.  
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11.2.3  
Indoor Unit Installation  
11.2.3.1 For the right rear piping  
11.2.3.2 For the right bottom piping  
11.2.3.3 For the embedded piping  
(This can be used for left rear piping and bottom  
piping also.)  
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11.2.4  
Connect the Cable to the Indoor Unit  
1. The inside and outside connection 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. Connection cable 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 repectively.  
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.  
24  
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11.2.5  
Wiring Stripping and connecting requirement  
11.2.5.1  
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 are 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.  
25  
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11.3 Outdoor Unit  
11.3.1  
Install the Outdoor Unit  
š
After selecting the best location, start installation according 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
E9NKUA, E12NKUA 22-7/16"  
4-1/8"  
23/32"  
12-19/32"  
Do not over tighten, over tightening may cause gas leakage.  
11.3.2  
Connect the Piping  
Piping size  
1/4"  
Torque  
13.3 Ibf.ft  
31.0 Ibf.ft  
40.6 Ibf.ft  
47.9 Ibf.ft  
73.8 Ibf.ft  
3/8”  
1/2"  
11.3.2.1 Connecting the piping to  
indoor  
Please make flare after inserting flare nut (locate at  
joint portion, of tube assembly) onto the copper pipe.  
(In case of using long piping)  
5/8”  
3/4"  
Connect the piping  
š
Align the center of piping and sufficiently tighten  
the flare nut with fingers.  
š
Further tighten the flare nut with torque wrench in  
specified torque as stated in the table.  
11.3.2.2 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 valves and then tighten with  
torque wrench to the specified torque as stated in the  
table.  
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11.3.2.3 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.  
11.3.2.4 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 11.3.3.  
11.3.3  
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 house 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.ft with 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").  
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8. Mount valve caps onto the 2-way valve and the 3-way valve.  
Be sure to check for gas leakage.  
o
11.3.3.1 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. Connection cable 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 connection cable  
between indoor unit and outdoor unit according to the diagram below.  
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 11.2.4 of indoor unit.  
š
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.  
11.3.3.2 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 1/4" or above.  
28  
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12. Operation Control  
12.1 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.  
12.1.1  
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.  
12.1.2  
Cooling Operation  
12.1.2.1 Thermostat control  
š
š
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.  
12.1.3  
Soft Dry Operation  
12.1.3.1 Thermostat control  
š
š
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.  
12.1.4  
Heating Operation  
12.1.4.1 Thermostat control  
š
š
Compressor is OFF when Intake Temperature - Internal Setting Temperature > 35.6°F.  
Compressor is ON after waiting for 3 minutes, if the Intake Air Temperature - Internal Setting Temperature <  
Compressor OFF point  
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12.1.4.2 Automatic Operation  
š
This mode can be set using remote control and the operation is decided by remote control setting temperature,  
remote control operation mode, indoor intake air temperature and outdoor air temperature.  
During operation mode judgment, indoor fan motor (with speed of Lo-) and outdoor fan motor are running for 30  
seconds to detect the indoor intake and outdoor air temperature. The operation mode is decided based on below  
chart.  
š
š
š
Every 30 minutes, the indoor and outdoor temperature is judged. Based on remote control setting temperature,  
the value of T1 will increase up to 50°F, T2 will decrease by 37.4°F and T3 will decrease up to 46.4°F.  
The Auto Operation Mode shifting will take place whenever operation mode changed from Cool/Soft Dry to  
Heating or vice versa.  
12.2 Indoor Fan Motor Operation  
12.2.1  
Basic Rotation Speed (rpm)  
š
Manual Fan Speed  
[Cooling, Dry]  
o
Fan motor’s number of rotation is determined according to remote control setting.  
Remote control  
Tab  
○
○
○
○
○
Hi  
Me+  
Me  
Me-  
Lo  
[Heating]  
o
Fan motor’s number of rotation is determined according to remote control setting.  
Remote control  
Tab  
○
○
○
○
○
Shi  
Me+  
Me  
Me-  
Lo  
š
Auto Fan Speed  
[Cooling, Dry]  
o
o
According to room temperature and setting temperature, indoor fan speed is determined automatically.  
The indoor fan will operate according to pattern below.  
o
During operation, indoor fan motor may stop due to odor prevention.  
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[Heating]  
o
According to indoor pipe temperature, automatic heating fan speed is determined as follows.  
š
Feedback control  
o
Immediately after the fan motor started, feedback control is performed once every second.  
During fan motor on, if fan motor feedback ≥ 2550 rpm or < 50 rpm continue for 10 seconds, then fan motor  
error counter increase, fan motor is then stop and restart. If the fan motor counter becomes 7 times, then  
H19 - fan motor error is detected. Operation stops and cannot on back.  
o
12.3 Outdoor Fan Motor Operation  
Outdoor fan motor is operated with fan speed number of rotation. It starts when compressor starts operation and it  
stops 30 seconds after compressor stops operation.  
ON  
ON  
Compressor  
OFF  
ON  
Fan Speed  
ON  
Outdoor Fan  
ƒ30 sec„  
OFF  
12.4 Airflow Direction  
š
There are two types of airflow, vertical airflow (directed by horizontal vane) and horizontal airflow (directed by  
vertical vanes).  
š
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).  
12.4.1  
Vertical Airflow  
š
š
Automatic vertical airflow direction can be set using remote control; the vane swings up and down within the  
angles as stated above. For heating mode operation, the angle of the vane depands on the indoor heat  
exchanger temperature as Figure 1 below. 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 2 below. When the air conditioner is stopped using remote control, the  
vane will shift to close position.  
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12.4.2  
Horizontal Airflow  
The horizontal airflow direction louvers can be adjusted manually by hand.  
12.5 Quiet Operation (Cooling Mode/Cooling Area of Dry Mode)  
š
Purpose  
o
To provide quiet cooling operation compare to normal operation.  
š
Control condition  
o
Quiet operation start condition  
ƒ
When “Quiet” button at remote control is pressed.  
Quiet LED illuminates.  
o
Quiet operation stop condition  
ƒ
When one of the following conditions is satisfied, quiet operation stops:  
š
š
š
š
Powerful button is pressed.  
Stop by OFF/ON button.  
OFF Timer activates.  
Quiet button is pressed again.  
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 memorised.  
š
Control contents  
o
Auto fan speed is change from normal setting to quiet setting of respective fan speed. This is to reduce  
sound of Hi, Me, Lo for 3dB.  
o
Manual fan speed for quiet operation is -1 step from setting fan speed.  
12.6 Quiet Operation (Heating)  
š
Purpose  
o
To provide quiet heating operation compare to normal operation.  
š
Control condition  
o
Quiet operation start condition  
ƒ
When “Quiet” button at remote control is pressed.  
Quiet LED illuminates.  
o
Quiet operation stop condition  
ƒ
When one of the following conditions is satisfied, quiet operation stops:  
š
š
š
š
Powerful button is pressed.  
Stop by OFF/ON button.  
Timer “off” activates.  
Quiet button is pressed again.  
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 timer “on” activates, quiet operation maintains.  
After off, when on back, quiet operation is not memorised.  
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š
Control contents  
o
Fan speed auto  
Indoor FM RPM depends on pipe temperature sensor of indoor heat exchanger. Auto fan speed is  
ƒ
changed from normal setting to quiet setting of respective fan speed. This is to reduce sound of Hi, Me,  
Lo for 3dB.  
o
Fan speed manual  
Manual fan speed for quiet operation is -1 step from setting fan speed.  
ƒ
12.7 Powerful Mode Operation  
š
When the powerful mode is selected, the internal setting temperature will shift lower up to 35.6°F (for  
Cooling/Soft Dry) or higher up to 38.3°F (for Heating) than remote control setting temperature for 20 minutes to  
achieve the setting temperature quickly.  
12.8 Timer Control  
12.8.1  
ON Timer Control  
š
ON Timer can be set using remote control, where the unit with timer set will start operation earlier than the setting  
time. This is to provide a comfortable environment when reaching the set ON time.  
60 minutes before the set ON time, indoor (at fan speed of Lo-) and outdoor fan motor start operation for 30  
seconds to determine the indoor intake air temperature and outdoor air temperature in order to judge the  
operation starting time.  
š
š
From the above judgment, the decided operation will start operation earlier than the set time as shown below.  
12.8.2  
OFF Timer Control  
š
OFF Timer can be set using remote control, the unit with timer set will stop at set time.  
12.9  
Auto Restart Control  
š
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 between 2 minutes 58 seconds and 3 minutes 52 seconds to be  
selected randomly) after power supply resumes.  
š
This type of control is not applicable during ON/OFF Timer setting.  
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12.10 Indication Panel  
Note:  
š
If POWER LED is blinking, the possible operation of the unit are Hot Start, during Deice operation, operation  
mode judgment, or ON timer sampling.  
š
If Timer LED is blinking, there is an abnormality operation occurs.  
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13. Operation Control (For Multi Split Connection)  
During multi split connection, indoor unit’s operation controls are same with single split connection unless specified in  
this chapter.  
13.1 Cooling operation  
13.1.1  
Thermostat control  
š
Capability supply to indoor unit is OFF (Expansion valve closed) when Intake Air Temperature — Internal setting  
temperature < 28.4°F.  
š
Capability resume supply to indoor unit after waiting for 3 minutes, if the Intake Air temperature — Internal setting  
temperature > Capability supply OFF point.  
13.2 Soft Dry Operation  
13.2.1  
Thermostat control  
š
Capability supply to indoor unit is OFF (Expansion valve closed) when Intake Air Temperature — Internal setting  
temperature < 26.6°F.  
š
Capability resume to indoor unit after waiting for 3 minutes, if the Intake Air temperature — Internal setting  
temperature > Capability supply OFF point.  
13.3 Heating Operation  
13.3.1  
Thermostat control  
š
Capability supply to indoor unit is OFF (Expansion valve closed) when Intake Air Temperature — Internal setting  
temperature > 33.8°F.  
š
š
During this condition, the indoor fan is stopped if compressor is ON.  
Capability resume supply to indoor unit after waiting for 3 minutes, if the Intake Air Temperature — Internal  
setting temperature < Capability supply OFF point.  
13.3.2  
Temperature Sampling Control  
š
Temperature sampling is controlled by outdoor unit where room temperature for all power supply ON indoor unit  
could be obtained.  
š
When capability supply to the indoor unit is OFF and the compressor is ON during heating operation, the indoor  
fan motor is stopped. During this condition, 15 seconds after sampling signal from outdoor unit is received, the  
indoor fan start operation at low fan speed.  
š
However, within first 4 minutes of capability stopped supply to the indoor unit, even sampling signal is received,  
the sampling control is cancelled.  
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13.4 Automatic Operation  
š
This mode can be set using remote control and the operation is decided by remote control setting temperature,  
remote control operation mode, indoor intake and outdoor air temperature.  
š
During operation mode judgment, indoor fan motor (with speed of -Lo) and outdoor fan motor are running for  
30 seconds to detect the indoor intake and outdoor air temperature. The operation mode is decided based on  
below chart.  
š
Every 180 minutes, the indoor and outdoor temperature is judge. Based on remote control setting temperature,  
the value of T1 will increase up to 50°F, T2 will decrease by 37.4°F and T3 will decrease up to 46.4°F.  
13.5 Indoor Fan Motor Operation  
13.5.1  
Residual Heat Removal Control  
š
To prevent high pressure at indoor unit, when heating mode thermostat-off condition or power supply OFF,  
indoor fan continue to operate at controlled fan speed for maximum 30 seconds then stop.  
13.6 Powerful Mode Operation  
š
When the power mode is selected, the internal setting temperature will shift lower up to 39.2“F for Cooling/Soft  
Dry or higher up to 42.8°F for heating than remote control setting temperature, the powerful operation continue  
until user cancel the Powerful operation by pressing powerful button again.  
13.7 Auto restart control  
š
When the power supply is cut off during the operation of air conditioner, the compressor will re-operate between  
three to four minutes (10 patterns to be selected randomly) after power resume.  
š
During multi split connection, Indoor unit will resume previous mode, include unit standby mode.  
13.8 Indication Panel  
Note:  
š
If POWER LED is blinking (0.5 second ON, 0.5 second OFF), the possible operation of the unit are during Indoor  
Residual Heat Removal, Hot Start, during Deice operation, operation mode judgment, or ON timer sampling.  
If POWER LED is blinking (2.5 seconds ON, 0.5 second OFF), the unit is in standby mode.  
If TIMER LED is blinking, there is an abnormality operation occurs.  
š
š
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14. Protection Control  
14.1 Protection Control For All Operations  
14.1.1  
Restart Control (Time Delay Safety Control)  
š
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.  
š
š
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.  
14.1.2  
30 Seconds Forced Operation  
š
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.  
š
14.1.3  
Total Running Current Control  
š
When the outdoor unit total running current (AC) exceeds X value, the frequency instructed for compressor  
operation will be decreased.  
š
š
If the running current does not exceed X value for 5 seconds, the frequency instructed will be increased.  
However, if total outdoor unit running current exceeds Y value, compressor will be stopped immediately for 3  
minutes.  
Model  
E9NKUA  
E12NKUA  
Operation Mode  
Cooling / Soft Dry (A)  
Cooling / Soft Dry (B)  
Heating  
X (A)  
3.89  
3.28  
5.50  
Y (A)  
15.00  
15.00  
15.00  
X (A)  
6.55  
6.10  
7.05  
Y (A)  
15.00  
15.00  
15.00  
1. The first 30 minutes of cooling operation, (A) will be applied.  
14.1.4  
IPM (Power Transistor) Prevention Control  
š
Overheating Prevention Control  
o
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.  
If this condition repeats continuously 4 times within 20 minutes, timer LED will be blinking (“F96” is indicated).  
š
DC Peak Current Control  
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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14.1.5  
Compressor Overheating Prevention Control  
š
Instructed frequency for compressor operation will be regulated by compressor discharge temperature. The  
changes of frequency are as below.  
š
If compressor discharge temperature exceeds 224.6°F, compressor will be stopped, occurs 4 times per 20  
minutes, timer LED will be blinking. (“F97” is indicated.)  
14.1.6  
Low Pressure Prevention Control (Gas Leakage Detection)  
š
Control start conditions  
o
For 5 minutes, the compressor continuously operates and outdoor total current is between 0.64A and 0.85A.  
During Cooling and Soft Dry operations:  
o
Indoor suction temperature - indoor piping temperature is below 39.2.°F.  
During Heating operations:  
o
Indoor piping temperature - indoor suction is under 41°F.  
š
Control contents  
o
Compressor stops (and restart after 3 minutes).  
o
If the conditions above happen 2 times within 20 minutes, the unit will:  
ƒ
ƒ
Stop operation  
Timer LED blinks and “F91” indicated.  
14.1.7  
Low Frequency Protection Control 1  
š
When the compressor operates at frequency lower than 24Hz continued for 240 minutes, the operation frequency  
will be changed to 25Hz for 2 minutes.  
14.1.8  
Low Frequency Protection Control 2  
š
When all below conditions comply, minimum limit of compressor will be set.  
Temperature, T, for:  
Indoor intake air (°F)  
Cooling / Soft Dry  
T < 57.2 or T ≥ 86  
T < 55.4 or T ≥ 100.4  
T < 86  
Heating  
-
Outdoor air (°F)  
T < 57.2 or T ≥ 82.4  
T ≥ 32  
Indoor heat exchanger (°F)  
14.2 Protection Control For Cooling & Soft Dry Operation  
14.2.1  
Outdoor Air Temperature Control  
š
The maximum current value is regulated when the outdoor air temperature rise above 57.2°F in order to avoid  
compressor overloading.  
38  
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14.2.2  
Cooling Overload Control  
š
Pipe temperature limitation / restriction.  
o
Detects the outdoor pipe temperature and carry out restriction / limitation below (Limit the compressor  
operation frequency)  
o
o
The compressor stops if outdoor pipe temperature exceeds 141.8°F.  
If the compressor stops 4 times in 20 minutes, Timer LED blinks (“F95” indicated: Outdoor high pressure rise  
protection)  
14.2.3  
Freeze Prevention Control 1  
š
When indoor heat exchanger temperature is lower than 32°F continuously for 6 minutes, compressor will stops  
operation.  
š
š
š
Compressor will resume its operation 3 minutes after the indoor heat exchanger is higher than 41°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.  
14.2.4  
Freeze Prevention Control 2  
š
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.  
š
Control contents  
o
Operation stops  
o
Timer LED blinks and “H99” indicated  
14.2.5  
Dew Prevention Control 1  
š
š
To prevent dew formation at indoor unit discharge area.  
This control will be activated if:  
o
Outdoor air temperature and Indoor pipe temperature judgment by microcontroller is fulfilled.  
When Cooling or Dry mode is operated more than 20 minutes or more.  
o
š
This control stopped if:  
o
o
o
Compressor stopped.  
Remote control setting changed (fan speed / temperature).  
Outdoor air temperature and indoor intake temperature changed.  
š
š
Fan speed, angle of louver (vertical airflow angle) will be adjusted accordingly in this control.  
1. Fan speed will be increased slowly when control is activated until predetermine value.  
Compressor frequency will be regulated accordingly.  
14.2.6  
Protection Control For Heating Operation  
14.2.6.1 Intake Air Temperature Control  
Compressor will operate at limited freq., if indoor intake air temperature is 95°C or above.  
39  
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14.2.6.2 Outdoor Air Temperature Control  
š
The maximum current value is regulated when the outdoor air temperature rise above 57.2°F in order to avoid  
compressor overloading.  
š
The compressor will be stopped to avoid compressor overloading.  
14.2.6.3 Overload Protection Control  
š
The compressor operating frequency is regulated in accordance to indoor heat exchanger temperature as shown  
below.  
š
If the heat exchanger temperature exceeds 60°C, compressor will stop.  
14.2.6.4 Low Temperature Compressor Oil Return Control  
š
In heating operation, if the outdoor temperature falls below 14°F when compressor starts, the compressor  
frequency will be regulated up to 600 seconds.  
14.2.6.5 Cold Draught Prevention Control  
š
When indoor pipe temperature is low, cold draught operation starts where indoor fan speed will be reduced or  
stop.  
š
Horizontal vane angle may be adjusted in Auto vane setting.  
14.2.6.6 Deice Operation  
š
When outdoor pipe temperature and outdoor air temperature is low, deice operation start where indoor fan motor  
and outdoor fan motor stop and operation LED blinks. Horizontal vane is closed during auto vane setting.  
40  
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15. Servicing Mode  
15.1 Auto Off/On Button  
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 heard at the fifth seconds, in order to identify the starting of Test Run operation  
(Forced cooling operation). Within 5 minutes after Forced cooling operation start, the Auto OFF/ON button is  
pressed for more than 5 seconds. A 2 “beep” sounds will heard at the fifth seconds, in order to identify the  
starting of Forced heating 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) and 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 and stored in EEPROM of indoor  
unit. 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 indoor 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 (J1)  
Short  
Jumper B (D2)  
Open  
Remote Control No.  
A (Default)  
Open  
Short  
Open  
Open  
Short  
Short  
B
C
D
ƒ
During Remote Control Number Switch Mode, press any button at remote control to transmit and store  
the transmission code to the EEPROM.  
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 at remote  
control.  
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Press Auto OFF/ON button to toggle remote control receiving sound.  
- Short “beep”: Turn OFF remote control receiving sound.  
- Long “beep”:  
Turn ON 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.  
15.2 Remote Control Button  
15.2.1  
SET Button  
š
To check remote control transmission code and store the transmission code to EEPROM  
o
Press “Set” button continuously for 10 seconds by using pointer  
o
Press “Timer Set” button unit a “beep” sound is heard as confirmation of transmission code change.  
15.2.2  
RESET (RC)  
š
To clear and restore the remote control setting to factory default.  
o
Press once to clear the memory  
15.2.3  
RESET (AC)  
š
To restore the unit’s setting to factory default.  
o
Press once to restore the unit’s setting  
15.2.4  
TIMER ▲  
š
To change indoor unit indicator’s LED intensity:  
o
Press continuously for 5 seconds.  
15.2.5  
TIMER ▼  
š
To change remote control display from Degree Celsius (°C) to Degree Fahrenheit (°F)  
o
Press continuously for 10 seconds.  
15.2.6  
CLOCK Button  
š
To change the remote control time format:  
Press for more than 5 seconds  
o
42  
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16. Troubleshooting Guide  
16.1 Refrigeration Cycle System  
Normal Pressure and Outlet Air Temperature (Standard)  
In order to diagnose malfunctions, make sure that there are no  
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 on the right.  
Gas Pressure  
PSI  
Outlet air  
Temperature  
(°F)  
(kg/cm2G)  
130.53 ~ 174.04  
(9 ~ 12)  
333.58 ~ 420.60  
(23 ~ 29)  
Cooling Mode  
Heating Mode  
53.6 ~ 60.8  
96.8 ~ 113  
Condition: Indoor fan speed = High  
Outdoor temperature 95°F at cooling mode  
and 44.6°F at heating mode.  
Compressor operate at rated frequency  
43  
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16.1.1  
Relationship between the condition of the air conditioner and pressure and  
electric current  
š
Carry out the measurements of pressure, electric current, and temperature fifteen minutes after an operation is  
started.  
44  
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16.2 Breakdown Self Diagnosis Function  
16.2.1  
Self Diagnosis Function (Three Digits Alphanumeric Code)  
š
š
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.  
š
In operation after breakdown repair, the Timer LED will not blink. The last error code (abnormality) will be stored  
in IC memory.  
16.2.2  
To Make a Diagnosis  
1
2
Timer LED starts to blink and the unit automatically stops the operation.  
Press the CHECK button on the remote control continuously for  
5 seconds.  
3
4
“- -“ 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.  
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.  
16.2.3  
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.  
16.2.4  
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.  
16.2.5  
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  
Temporary items  
Emergency Operation  
with limited power  
H27, H28  
Cooling, Heating  
45  
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16.3 Error Code Table  
46  
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Note:  
“○” – Frequency measured and fan speed fixed  
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.  
47  
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16.4 Self-diagnosis Method  
16.4.1  
H11 (Indoor/Outdoor Abnormal Communication)  
Malfunction Decision Conditions  
š
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  
š
š
š
š
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.  
š
Indoor unit-outdoor unit signal transmission error due to disturbed power supply waveform.  
Troubleshooting  
48  
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16.4.2  
H12 (Indoor/Outdoor Capacity Rank Mismatched)  
Malfunction Decision Conditions  
During startup, error code appears when different types of indoor and outdoor units are interconnected.  
š
Malfunction Caused  
š
š
š
š
š
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  
49  
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16.4.3  
H14 (Indoor Intake Air Temperature Sensor Abnormality)  
Malfunction Decision Conditions  
š
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  
š
š
š
Faulty connector connection.  
Faulty sensor.  
Faulty PCB.  
Troubleshooting  
50  
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16.4.4  
H15 (Compressor Temperature Sensor Abnormality)  
Malfunction Decision Conditions  
š
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  
š
š
š
Faulty connector connection.  
Faulty sensor.  
Faulty PCB.  
Troubleshooting  
51  
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16.4.5  
H16 (Outdoor Current Transformer Open Circuit)  
Malfunction Decision Conditions  
š
A current transformer (CT) is detected by checking the compressor running frequency (≥ rated frequency) and  
CT detected input current (less than 0.65A) for continuously 20 seconds.  
Malfunction Caused  
š
š
š
CT defective  
Outdoor PCB defective  
Compressor defective (low compression)  
Troubleshooting  
52  
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16.4.6  
H19 (Indoor Fan Motor – DC Motor Mechanism Locked)  
Malfunction Decision Conditions  
š
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  
š
š
š
š
š
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  
53  
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16.4.7  
H23 (Indoor Pipe Temperature Sensor Abnormality)  
Malfunction Decision Conditions  
š
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  
š
š
š
Faulty connector connection.  
Faulty sensor.  
Faulty PCB.  
Troubleshooting  
54  
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16.4.8  
H27 (Outdoor Air Temperature Sensor Abnormality)  
Malfunction Decision Conditions  
š
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  
š
š
š
Faulty connector connection.  
Faulty sensor.  
Faulty PCB.  
Troubleshooting  
55  
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16.4.9  
H28 (Outdoor Pipe Temperature Sensor Abnormality)  
Malfunction Decision Conditions  
š
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  
š
š
š
Faulty connector connection.  
Faulty sensor.  
Faulty PCB.  
Troubleshooting  
56  
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16.4.10 H30 (Compressor Discharge Temperature Sensor Abnormality)  
Malfunction Decision Conditions  
š
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  
š
š
š
Faulty connector connection.  
Faulty sensor.  
Faulty PCB.  
Troubleshooting  
57  
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16.4.11 H32 (Outdoor Heat Exchanger Temperature Sensor 2 Abnormality)  
Malfunction Decision Conditions  
š
During startup and operation of cooling and heating, the temperatures detected by the outdoor heat exchanger  
temperature sensor are used to determine sensor errors.  
Malfunction Caused  
š
š
š
Faulty connector connection.  
Faulty sensor.  
Faulty PCB.  
Troubleshooting  
58  
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16.4.12 H33 (Unspecified Voltage between Indoor and Outdoor)  
Malfunction Decision Conditions  
š
The supply power is detected for its requirement by the indoor/outdoor transmission.  
Malfunction Caused  
š
š
š
Wrong models interconnected.  
Wrong indoor unit and outdoor unit PCBs used.  
Indoor unit or outdoor unit PCB defective.  
Troubleshooting  
59  
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16.4.13 H36 (Outdoor Gas Pipe Sensor Abnormality)  
Malfunction Decision Conditions  
š
During startup and operation of cooling and heating, the temperatures detected by the outdoor gas pipe  
temperature sensor are used to determine sensor errors.  
Malfunction Caused  
š
š
š
Faulty connector connection.  
Faulty sensor.  
Faulty PCB.  
Troubleshooting  
60  
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16.4.14 H37 (Outdoor Liquid Pipe Temperature Sensor Abnormality)  
Malfunction Decision Conditions  
š
During startup and operation of cooling and heating, the temperatures detected by the outdoor liquid pipe  
temperature sensor are used to determine sensor errors.  
Malfunction Caused  
š
š
š
Faulty connector connection.  
Faulty sensor.  
Faulty PCB.  
Troubleshooting  
61  
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16.4.15 H97 (Outdoor Fan Motor – DC Motor Mechanism Locked)  
Malfunction Decision Conditions  
š
The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor.  
Malfunction Caused  
š
š
š
š
š
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  
62  
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16.4.16 H98 (Indoor High Pressure Protection)  
Error Code will not display (no Timer LED blinking) but store in EEPROM  
Malfunction Decision Conditions  
š
During heating operation, the temperature detected by the indoor pipe temperature sensor is above 140°F.  
Malfunction Caused  
š
š
š
š
š
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  
63  
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16.4.17  
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)  
š
Malfunction Caused  
š
š
š
š
š
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  
64  
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16.4.18  
F11 (Indoor Pipe Temperature Sensor Abnormality)  
Malfunction Decision Conditions  
š
When cooling operation, when indoor pipe temperature or indoor heat exchanger temperature sensor is above  
113°F.  
Malfunction Caused  
š
š
š
Faulty connector connection.  
Faulty indoor pipe temperature sensor.  
Faulty indoor main PCB.  
Troubleshooting  
65  
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16.4.19 F17 (Indoor Standby Units Freezing Abnormality)  
Malfunction Decision Conditions  
š
When the different between indoor intake air temperature and indoor pipe temperature is above 50°F or indoor  
pipe temperature is below 30.2°F  
Remark:  
When the indoor standby unit is freezing, the outdoor unit transfers F17 error code to the corresponding indoor  
unit and H39 to other indoor unit(s).  
Malfunction Caused  
š
š
š
Wrong wiring connection  
Faulty sensor  
Faulty expansion valve  
Troubleshooting  
66  
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16.4.20 F90 (Power Factor Correction Protection)  
Malfunction Decision Conditions  
š
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  
š
š
š
DC voltage peak due to power supply surge.  
DC voltage peak due to compressor windings not uniform.  
Faulty outdoor PCB.  
Troubleshooting  
67  
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16.4.21  
F91 (Refrigeration Cycle Abnormality)  
Malfunction Decision Conditions  
š
š
š
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  
š
š
š
š
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  
68  
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16.4.22  
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  
š
š
Compressor terminal disconnect  
Outdoor PCB malfunction  
Troubleshooting  
69  
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16.4.23  
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  
š
š
š
š
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  
70  
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16.4.24  
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  
š
š
š
š
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  
71  
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16.4.25  
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  
š
š
š
Refrigerant shortage (refrigerant leakage).  
2/3 way valve closed.  
Detection error due to faulty compressor tank temperature sensor.  
Troubleshooting  
72  
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16.4.26  
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  
š
š
š
š
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  
73  
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16.4.27  
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  
š
š
š
DC peak due to compressor failure.  
DC peak due to defective power transistor(s).  
DC peak due to defective outdoor unit PCB.  
Troubleshooting  
š
š
š
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.  
š
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  
74  
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17. 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.  
17.1 Indoor Electronic Controllers, Cross Flow Fan and Indoor Fan Motor  
Removal Procedures  
17.1.1  
To remove front grille  
17.1.1.1 To remove power electronic controller  
75  
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17.1.1.2 To remove discharge grille  
76  
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17.1.1.3 To remove control board  
17.1.1.4 To remove cross flow fan and indoor fan motor  
77  
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78  
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18. Technical Data  
18.1 Operation Characteristics  
18.1.1  
CS-E9NK CU-E9NK  
š
Cooling Characteristic  
o
o
o
o
Room temperature:  
Operation condition:  
Piping length:  
81°F (DBT), 66°F (WBT)  
High fan speed  
24.6ft  
Compressor Frequency : Fc  
208  
230  
61.000  
60.000  
59.000  
58.000  
57.000  
56.000  
55.000  
5
10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105  
Outdoor Air Temperature (°F)  
2.900  
2.700  
2.500  
2.300  
2.100  
1.900  
5
10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105  
Outdoor Air Temperature (°F)  
4.000  
3.500  
3.000  
2.500  
2.000  
5
10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105  
Outdoor Air Temperature (°F)  
145.000  
140.000  
135.000  
130.000  
125.000  
120.000  
5
10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105  
Outdoor Air Temperature (°F)  
79  
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š
Piping Length Characteristic Cooling  
o
o
o
o
Room temperature:  
Operation condition:  
Outdoor temperature: 95°F (DBT)  
Compressor Frequency : Fc  
81°F (DBT), 66°F (WBT)  
High fan speed  
208  
230  
59.600  
59.400  
59.200  
59.000  
58.800  
9
11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51  
Piping Length (ft)  
2.510  
2.490  
2.470  
2.450  
2.430  
2.410  
9
11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51  
Piping Length (ft)  
141.000  
140.500  
140.000  
139.500  
139.000  
9
11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51  
Piping Length (ft)  
3.600  
3.500  
3.400  
3.300  
3.200  
3.100  
3.000  
9
11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51  
Piping Length (ft)  
80  
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š
Heating Characteristic  
o
o
o
o
Room temperature:  
Operation condition:  
Piping length:  
68°F (DBT)  
High fan speed  
24.6ft  
Compressor Frequency : Fh  
208  
230  
124.000  
119.000  
114.000  
109.000  
104.000  
99.000  
94.000  
89.000  
84.000  
5
10  
15 20 25 30  
35 40 45 50  
55 60 65 70  
75 80  
Outdoor Air Temperature (°F)  
3.900  
3.400  
2.900  
2.400  
1.900  
1.400  
5
10  
15  
20  
25  
30  
35  
40  
45  
50  
55  
60  
60  
60  
65  
65  
65  
70  
75  
80  
Outdoor Air Temperature (°F)  
7.500  
7.000  
6.500  
6.000  
5.500  
5.000  
4.500  
4.000  
3.500  
5
10  
15  
20  
25  
30  
35  
40  
45  
50  
55  
70  
75  
80  
Outdoor Air Temperature (°F)  
133.000  
123.000  
113.000  
103.000  
93.000  
83.000  
73.000  
63.000  
53.000  
5
10 15  
20  
25  
30 35  
40  
45  
50 55  
70 75  
80  
Outdoor Air Temperature (°F)  
81  
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š
Piping Length Characteristic Heating  
o
o
o
o
Room temperature:  
Operation condition:  
Outdoor temperature: 47°F (DBT), 43°F (WBT)  
Compressor Frequency : Fh  
68°F (DBT)  
High fan speed  
208  
230  
104.900  
104.400  
103.900  
103.400  
102.900  
102.400  
9
11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51  
Piping Length (ft)  
3.300  
3.250  
3.200  
3.150  
3.100  
3.050  
3.000  
9
11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51  
Piping Length (ft)  
100.000  
99.800  
99.600  
99.400  
99.200  
99.000  
98.800  
98.600  
98.400  
9
11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51  
Piping Length (ft)  
6.200  
6.100  
6.000  
5.900  
5.800  
5.700  
5.600  
5.500  
5.400  
5.300  
5.200  
9
11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51  
Piping Length (ft)  
82  
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18.1.2  
CS-E12NK CU-E12NK  
š
Cooling Characteristic  
o
o
o
o
Room temperature:  
Operation condition:  
Piping length:  
81°F (DBT), 66°F (WBT)  
High fan speed  
24.6ft  
Compressor Frequency : Fc  
208  
230  
59.000  
58.000  
57.000  
56.000  
55.000  
54.000  
5
10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105  
Outdoor Air Temperature (°F)  
4.200  
4.000  
3.800  
3.600  
3.400  
3.200  
3.000  
2.800  
5
10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105  
Outdoor Air Temperature (°F)  
6.100  
5.600  
5.100  
4.600  
4.100  
3.600  
5
10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105  
Outdoor Air Temperature (°F)  
142.000  
137.000  
132.000  
127.000  
122.000  
117.000  
5
10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105  
Outdoor Air Temperature (°F)  
83  
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š
Piping Length Characteristic Cooling  
o
o
o
o
Room temperature:  
Operation condition:  
Outdoor temperature: 95°F (DBT)  
Compressor Frequency : Fc  
81°F (DBT), 66°F (WBT)  
High fan speed  
208  
230  
58.400  
58.200  
58.000  
57.800  
57.600  
57.400  
9
11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51  
Piping Length (ft)  
3.520  
3.500  
3.480  
3.460  
3.440  
3.420  
9
11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51  
Piping Length (ft)  
137.200  
137.000  
136.800  
136.600  
136.400  
136.200  
136.000  
135.800  
9
11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51  
Piping Length (ft)  
5.300  
5.200  
5.100  
5.000  
4.900  
4.800  
4.700  
4.600  
9
11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51  
Piping Length (ft)  
84  
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š
Heating Characteristic  
o
o
o
o
Room temperature:  
Operation condition:  
Piping length:  
68°F (DBT)  
High fan speed  
24.6ft  
Compressor Frequency : Fh  
208  
230  
126.000  
121.000  
116.000  
111.000  
106.000  
101.000  
96.000  
91.000  
86.000  
5
10  
15 20 25 30  
35 40 45 50  
55 60 65 70  
75 80  
Outdoor Air Temperature (°F)  
5.200  
4.700  
4.200  
3.700  
3.200  
2.700  
2.200  
1.700  
5
10  
15  
20  
25  
30  
35  
40  
45  
50  
55  
60  
60  
60  
65  
65  
65  
70  
75  
80  
Outdoor Air Temperature (°F)  
8.300  
7.800  
7.300  
6.800  
6.300  
5.800  
5.300  
4.800  
4.300  
5
10  
15  
20  
25  
30  
35  
40  
45  
50  
55  
70  
75  
80  
Outdoor Air Temperature (°F)  
132.000  
122.000  
112.000  
102.000  
92.000  
82.000  
72.000  
62.000  
52.000  
5
10 15  
20  
25  
30 35  
40  
45  
50 55  
70 75  
80  
Outdoor Air Temperature (°F)  
85  
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š
Piping Length Characteristic Heating  
o
o
o
o
Room temperature:  
Operation condition:  
Outdoor temperature: 47°F (DBT), 43°F (WBT)  
Compressor Frequency : Fh  
68°F (DBT)  
High fan speed  
208  
230  
107.200  
106.700  
106.200  
105.700  
105.200  
104.700  
9
11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51  
Piping Length (ft)  
4.100  
4.050  
4.000  
3.950  
3.900  
3.850  
3.800  
9
11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51  
Piping Length (ft)  
98.200  
98.000  
97.800  
97.600  
97.400  
97.200  
97.000  
96.800  
96.600  
9
11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51  
Piping Length (ft)  
6.600  
6.500  
6.400  
6.300  
6.200  
6.100  
6.000  
5.900  
5.800  
5.700  
5.600  
9
11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51  
Piping Length (ft)  
86  
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19. Exploded View and Replacement Parts List  
19.1 Indoor Unit  
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.  
87  
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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-E9NKUAW  
CWD50C1633  
L6CBYYYL0055  
CWH02C1076  
CWH64K007  
CWH551146  
CWB30C3504  
CWT251030  
CWT251031  
CWH32143  
CS-E12NKUAW  
REMARK  
←
2
FAN MOTOR  
←
O
3
CROSS-FLOW FAN COMPLETE  
BEARING ASSY  
←
4
←
5
SCREW - CROSS-FLOW FAN  
EVAPORATOR  
←
7
CWB30C3505  
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  
CWA73C6147  
CWA746567  
CWA746489  
CWA50C2800  
CWH131350  
CWD933021  
CWH13C1201  
CWE20C3038  
CWD933233B  
CWH621102  
CWE241287  
CWE261152  
CWE261154  
CWE261155  
CWE261153  
CWA981240  
CWH521096  
CWE24C1268  
CWA75C3724  
CWE11C4512  
CWE22C1507  
CWE14C1029  
CWD001279  
XTT4+16CFJ  
CWH521194  
CWH851173  
CWH361097  
CWH82C1705  
CWF568316  
CWF615169  
CWD00C1141  
CWD041144A  
CWG861426  
CWG712940  
CWG712941  
CWG565009  
←
←
O
O
O
O
O
CWA73C6148  
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
←
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
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)  
š
š
All parts are supplied from PHAAM, Malaysia (Vendor Code: 00029488).  
“O” marked parts are recommended to be kept in stock.  
88  
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19.2 Outdoor Unit  
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.  
89  
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REF. NO.  
1
PART NAME & DESCRIPTION  
CHASSIS ASSY  
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
1
1
1
1
1
1
CU-E9NKUA  
CWD50K2081A  
CWD541089  
CWH551217  
ARW6404AC  
CWH55252J  
CWH03K1014  
CWH56053J  
5RS102XHA21  
CWH50077  
CU-E12NKUA  
REMARK  
←
2
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  
21a  
21b  
22  
23  
24  
26  
27  
28  
29  
30  
31  
32  
33  
34  
36  
37  
38  
39  
40  
41  
42  
43  
44  
45  
46  
47  
48  
49  
CWH56000J  
CWB32C3394  
CWB051016J  
CWB121021  
CWH351015A  
CWB021333  
CWB011374  
CWH171039A  
CWH7080300J  
CWH151172A  
CWG302570  
CWG302292  
CWG302569  
CWA50C2340  
CWH131264  
CWA73C6161R  
CWA28K1154  
CWE04C1226  
CWA50C2793  
CWE041492A  
CWE06C1142  
CWE031018A  
CWH131301  
CWH13C1208  
CWE161010  
G0C193J00003  
CWB001058  
CWD041161A  
CWA43C2432  
CWA341065  
CWG87C900  
CWB111061  
CWA43C2393  
CWB121047  
CWG861078  
CWG50C2388  
CWG712209  
CWG712210  
CWG565107  
←
←
EXPANSION VALVE  
←
DISCHARGE MUFFLER (EXP VALVE)  
HOLDER COUPLING  
←
←
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  
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  
CABINET FRONT PLATE CO.  
CABINET TOP PLATE  
←
←
←
←
←
←
O
←
CWA73C6162R  
O
O
←
←
←
O
←
←
←
PLATE - C. B. COVER TERMINAL  
CONTROL BOARD COVER CO.  
HANDLE  
←
←
←
REACTOR  
G0C193J00004  
O
O
4-WAYS VALVE  
←
←
←
←
←
←
←
←
←
←
←
←
←
WIRE NET  
V-COIL COMPLETE  
CRANKCASE HEATER  
ACCESSORY CO.(DRAIN ELBOW)  
STRAINER  
V-COIL COMPLETE (EXP. VALVE)  
DISCHARGE MUFFLER (4 W.VALVE)  
BAG  
BASE BOARD - COMPLETE  
SHOCK ABSORBER (R)  
SHOCK ABSORBER (L)  
C.C.CASE  
(Note)  
š
š
All parts are supplied from PHAAM, Malaysia (Vendor Code: 00029488).  
“O” marked parts are recommended to be kept in stock.  
Printed in Malaysia  
FB1111-0  
90  
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