Panasonic CS-RE9SKUA User manual

© Panasonic Corporation 2016.
Order No: PAPAMY1601005CE
MODE
POWERFUL/
QUIET
TIMER
CANCELOFF
123
FAN SPEED
SET CHECK CLOCK RESET
AC RC
AUTO
HEAT
COOL
DRY
FAN
FAN
SPEED
AIR
SWING
AIR SWING
/
TEMP
OFF/ON
TIMER
SET
CANCEL
ON
O
FF
1
2
3
MODE
POWERFUL/
QUIET
TEMP
123
AIR SWING
FAN SPEED
SET CHECK CLOCK RESET
AC RC
FAN
SPEED
AIR
SWING
AUTO
HEAT
COOL
DRY
FAN
/
TEMP
OFF/ON
TIMER
SET
CANCEL
ON
OFF
1
2
3
CHE
Indoor Unit Outdoor Unit
CS-RE9SKUA
CS-RE12SKUA
CS-RE18SKUA
CS-RE24SKUA
CU-RE9SKUA
CU-RE12SKUA
CU-RE18SKUA
CU-RE24SKUA
Destination
USA
Canada
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.

2
TABLE OF CONTENTS
1.Safety Precautions ............................................. 3
2.Specification ....................................................... 5
3.Features ............................................................. 11
4.Location of Controls and Components .......... 12
4.1Indoor Unit .................................................. 12
4.2Outdoor Unit ............................................... 12
4.3Remote Control .......................................... 12
5.Dimensions ....................................................... 13
5.1Indoor Unit .................................................. 13
5.2Outdoor Unit ............................................... 15
6.Refrigeration Cycle Diagram ........................... 16
6.1CU-RE9SKUA CU-RE12SKUA ................. 16
6.2CU-RE18SKUA CU-RE24SKUA ............... 17
7.Block Diagram .................................................. 18
7.1CS-RE9SKUA CU-RE9SKUA
CS-RE12SKUA CU-RE12SKUA ................ 18
7.2CS-RE18SKUA CU-RE18SKUA
CS-RE24SKUA CU-RE24SKUA ................ 19
8.Wiring Connection Diagram ............................ 20
8.1Indoor Unit .................................................. 20
8.2Outdoor Unit ............................................... 22
9.Electronic Circuit Diagram .............................. 24
9.1Indoor Unit .................................................. 24
9.2Outdoor Unit ............................................... 26
10.Printed Circuit Board ....................................... 28
10.1Indoor Unit .................................................. 28
10.2Outdoor Unit ............................................... 29
11.Installation Instruction (RE9SKUA and
RE12SKUA) ....................................................... 31
11.1Select the Best Location ............................. 31
11.2Indoor Unit .................................................. 32
11.3Outdoor Unit ............................................... 37
12.Installation Instruction (RE18SKUA and
RE24SKUA) ....................................................... 40
12.1Select the Best Location ............................. 40
12.2Indoor Unit .................................................. 41
12.3Outdoor Unit ............................................... 46
13.Operation Control ............................................. 50
13.1Basic Function ............................................ 50
13.2Indoor Fan Speed Control .......................... 51
13.3Indoor Fan Motor Operation ....................... 52
13.4Outdoor Fan Motor Operation .................... 52
13.5Airflow Direction .......................................... 53
13.6Quiet Operation (Cooling Mode/Cooling Area
of Dry Mode) ............................................... 54
13.7Quiet Operation (Heating) .......................... 55
13.8Powerful Mode Operation ........................... 55
13.9Timer Control .............................................. 55
13.10Auto Restart Control ................................... 56
13.11Indication Panel .......................................... 56
14.Protection Control (RE9SK and RE12SK) ......57
14.1Protection Control For All Operations .........57
14.2Protection Control For Cooling & Soft Dry
Operation ....................................................59
15.Protection Control (RE18SK and RE24SK) ....62
15.1Protection Control For All Operations .........62
15.2Protection Control For Cooling & Soft Dry
Operation ....................................................63
16.Servicing Mode .................................................66
16.1Auto Off/On Button .....................................66
16.2Cooling Only Operation ..............................67
16.3Remote Control Button ...............................68
17.Troubleshooting Guide ....................................69
17.1Refrigeration Cycle System ........................69
17.2Breakdown Self Diagnosis Function ...........71
17.3Error Code Table ........................................72
17.4Self-diagnosis Method ................................74
18.Disassembly and Assembly Instructions ... 104
18.1CS-RE9SKUA CS-RE12SKUA .............. 104
18.2CS-RE18SKUA CS-RE24SKUA ............ 108
18.3Outdoor Electronic Controller Removal
Procedure ................................................ 112
19.Technical Data ............................................... 114
19.1Cool Mode Performance Data ................. 114
19.2Heat Mode Performance Data ................. 116
20.Service Data ................................................... 117
20.1CS-RE9SKUA CU-RE9SKUA ................. 117
20.2CS-RE12SKUA CU-RE12SKUA ............. 117
20.3CS-RE18SKUA CU-RE18SKUA ............. 118
20.4CS-RE24SKUA CU-RE24SKUA ............. 118
20.5CS-RE9SKUA CU-RE9SKUA ................. 119
20.6CS-RE12SKUA CU-RE12SKUA ............. 119
20.7CS-RE18SKUA CU-RE18SKUA ............. 119
20.8CS-RE24SKUA CU-RE24SKUA ............. 119
20.9Cool Mode Outdoor Air Temperature
Characteristic ........................................... 120
20.10Heat Mode Outdoor Air Temperature
Characteristic ........................................... 124
20.11Piping Length Correction Factor .............. 128
21.Exploded View and Replacement Parts List 130
21.1Indoor Unit ............................................... 130
21.2Outdoor Unit ............................................ 134

3
CAUTION
WARNING
WARNING
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
This indication shows the possibility of causing injury or damage to properties.
 The items to be followed are classified by the symbols:
 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.
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 model, use piping, flare nut and tools which is specified for R410A refrigerant. Using of existing (R22) piping, flare nut
and tools may cause abnormally high pressure in the refrigerant cycle (piping), and possibly result in explosion and injury.
Thickness or copper pipes used with R410A must be more than 1/32" (0.8 mm). Never use copper pipes thinner than 1/32" (0.8 mm).
It is desirable that the amount of residual oil is less than 0.0008 oz/ft (40 mg/10 m).
This symbol denotes item that is PROHIBITED from doing.

4
CAUTION
WARNING
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.
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 room air conditioner.
Power supply cord shall be UL listed or CSA approved 3 conductor with minimum AWG14 (For E9RK and E12RK) and AWG12
(For E18RK and E24RK) wires.
Power supply point should be in an easily accessible place for power disconnection in case of emergency.
In some countries, permanent connection of this air conditioner to the power supply is prohibited.
Fix power supply connection to a circuit breaker for permanent connection.
Use NRTL approved fuse or circuit breaker (rating refers to name plate) for permanent connection.
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.

5
2. Specification
Model Indoor CS-RE9SKUA CS-RE12SKUA
Outdoor CU-RE9SKUA CU-RE12SKUA
Performance Test Condition ARI ARI
Power Supply Phase, Hz Single, 60 Single, 60
V 208 230 208 230
Min. Mid. Max. Min. Mid. Max. Min. Mid. Max. Min. Mid. Max.
Cooling
Capacity kW 1.20 2.64 3.00 1.20 2.64 3.00 1.20 3.51 3.90 1.20 3.51 3.90
BTU/h 4100 9000 10200 4100 9000 10200 4100 12000 13300 4100 12000 13300
Running Current A - 4.2 - - 3.8 - - 5.5 - - 5.0 -
Input Power W 250 860 1.00k 250 860 1.00k 250 1.13k 1.30k 250 1.13k 1.30k
EER W/W 4.80 3.06 3.00 4.80 3.06 3.00 4.80 3.10 3.00 4.80 3.10 3.00
Btu/hW 16.40 10.45 10.20 16.40 10.45 10.20 16.40 10.60 10.20 16.40 10.60 10.20
Power Factor % - 98 - - 98 - - 99 - - 98 -
Indoor Noise (H / L / QLo) dB-A 43 / 30 / 25 43 / 30 / 25 43 / 30 / 25 43 / 30 / 25
Power Level dB 59 / - / - 59 / - / - 59 / - / - 59 / - / -
Outdoor Noise (H / L / QLo) dB-A 49 / - / - 49 / - / - 50 / - / - 50 / - / -
Power Level dB 64 / - / - 64 / - / - 65 / - / - 65 / - / -
Heating
Capacity kW 1.20 3.21 4.14 1.20 3.21 4.14 1.20 3.51 4.77 1.20 3.51 4.77
BTU/h 4100 10900 14100 4100 10900 14100 4100 12000 16300 4100 12000 16300
Running Current A - 4.6 - - 4.2 - - 4.5 - - 4.0 -
Input Power W 200 950 1.50k 200 950 1.50k 200 910 1.71k 200 910 1.71k
COP W/W 6.00 3.38 2.76 6.00 3.38 2.76 6.00 3.86 2.79 6.00 3.86 2.79
Btu/hW 20.50 11.45 9.40 20.50 11.45 9.40 20.50 13.15 9.50 20.50 13.15 9.50
Power Factor % - 99 - - 98 - - 97 - - 99 -
Indoor Noise (H / L / QLo) dB-A 43 / 35 / 32 43 / 35 / 32 44 / 36 / 32 44 / 36 / 32
Power Level dB 59 / - / - 59 / - / - 60 / - / - 60 / - / -
Outdoor Noise (H / L / QLo) dB-A 49 / - / - 49 / - / - 52 / - / - 52 / - / -
Power Level dB 64 / - / - 64 / - / - 67 / - / - 67 / - / -
Max Current (A) / Max Input Power (W) 5.3 / 1.20k 7.0 / 1.61k
Starting Current (A) 4.6 5.5
Min Circuit Ampacity 15.0 15.0
Max. Current Protection 15.0 15.0
SEER / HSPF 16.00 / 8.50 16.00 / 8.50
Compressor
Type Hermetic Motor / Rotary Hermetic Motor / Rotary
Motor Type Brushless (6 poles) Brushless (6 poles)
Output Power W 700 700
Indoor Fan
Type Cross-flow fan Cross-flow fan
Material ASG20K1 ASG20K1
Motor Type DC (8 poles) DC (8 poles)
Input Power W 47.0 - 47.0 47.0 - 47.0
Output Power W 40 40
Speed
QLo rpm Cooling : 610
Heating : 730
Cooling : 620
Heating : 940
Lo rpm Cooling : 710
Heating : 830
Cooling : 780
Heating : 1040
Me rpm Cooling : 910
Heating : 1040
Cooling : 1000
Heating : 1210
Hi rpm Cooling : 1120
Heating : 1250
Cooling : 1230
Heating : 1380
SHi rpm Cooling : 1250
Heating : 1300
Cooling : 1350
Heating : 1430

6
Model
Indoor CS-RE9SKUA CS-RE12SKUA
Outdoor CU-RE9SKUA CU-RE12SKUA
Outdoor Fan
Type Propeller Propeller
Material PP PP
Motor Type DC (8 poles) DC (8 poles)
Input Power W - -
Output Power W 40 40
Speed Hi rpm C: 770 H: 750 C: 800 H: 830
Moisture Removal L/h (Pt/h) 0.5 (1.3) 1.1 (2.3)
Indoor Airflow
QLo m3/min (ft3/min) Cooling : 5.87 (207)
Heating : 6.95 (245)
Cooling : 5.75 (203)
Heating : 9.30 (328)
Lo m3/min (ft3/min) Cooling : 7.07 (250)
Heating : 8.10 (286)
Cooling : 7.60 (268)
Heating : 10.43 (368)
Me m3/min (ft3/min) Cooling : 9.47 (334)
Heating : 10.50 (371)
Cooling : 10.14 (358)
Heating : 12.36 (436)
Hi m3/min (ft3/min) Cooling : 12.0 (425)
Heating : 12.9 (455)
Cooling : 12.8 (450)
Heating : 14.3 (505)
SHi m3/min (ft3/min) Cooling : 13.56 (479)
Heating : 13.47 (476)
Cooling : 14.18 (501)
Heating : 14.87 (525)
Outdoor
Airflow Hi m3/min (ft3/min) Cooling : 29.8 (1050)
Heating : 29.8 (1050)
Cooling : 31.0 (1095)
Heating : 31.0 (1095)
Refrigeration
Cycle
Control Device Expansion Valve Expansion Valve
Refrigerant Oil cm3 FV50S (320) FV50S (320)
Refrigerant Type g (oz) R410A, 900 (31.8) R410A, 900 (31.8)
Dimension
Height(I/D / O/D) mm (inch) 290 (11-7/16) / 542 (21-11/32) 290 (11-7/16) / 542 (21-11/32)
Width (I/D / O/D) mm (inch) 870 (34-9/32) / 780 (30-23/32) 870 (34-9/32) / 780 (30-23/32)
Depth (I/D / O/D) mm (inch) 214 (8-7/16) / 289 (11-13/32) 214 (8-7/16) / 289 (11-13/32)
Weight Net (I/D / O/D) kg (lb) 9 (20) 34 (75) 9 (20) 34 (75)
Piping
Pipe Diameter (Liquid / Gas) mm (inch) 6.35 (1/4) / 9.52 (3/8) 6.35 (1/4) / 12.70 (1/2)
Standard length m (ft) 7.5 (24.6) 7.5 (24.6)
Length range (min – max) m (ft) 3 (9.8) ~ 15 (49.2) 3 (9.8) ~ 15 (49.2)
I/D & O/D Height different m (ft) 15 (49.2) 15 (49.2)
Additional Gas Amount g/m (oz/ft) 20 (0.2) 20 (0.2)
Length for Additional Gas m (ft) 7.5 (24.6) 7.5 (24.6)
Drain Hose Inner Diameter mm (inch) 16.7 (5/8) 16.7 (5/8)
Length mm (inch) 650 (25-5/8) 650 (25-5/8)
Indoor Heat
Exchanger
Fin Material Aluminium (Pre Coat) Aluminium (Pre Coat)
Fin Type Slit Fin Slit Fin
Row × Stage × FPI 2 × 15 × 21 2 × 15 × 21
Size (W × H × L) inch 1 × 12-13/32 × 24 1 × 12-13/32 × 24
Outdoor
Heat
Exchanger
Fin Material Aluminium (Blue coated) Aluminium (Blue coated)
Fin Type Corrugate Fin Corrugate Fin
Row × Stage × FPI 2 × 24 × 17 2 × 24 × 17
Size (W × H × L) inch 1-13/32 × 19-13/16 × 28-1/16
26-15/16
1-13/32 × 19-13/16 × 28-1/16
26-15/16
Air Filter Material Polypropelene Polypropelene
Type One-touch One-touch
Power Supply Outdoor Outdoor
Power Supply Cord A - -
Thermostat - -
Protection Device - -

7
Model
Indoor CS-RE9SKUA CS-RE12SKUA
Outdoor CU-RE9SKUA CU-RE12SKUA
DRY BULB WET BULB DRY BULB WET BULB
Indoor Operation Range
(Cooling) (°F / °C)
Maximum 89.6 / 32 73.4 / 23 89.6 / 32 73.4 / 23
Minimum 60.8 / 16 51.8 / 11 60.8 / 16 51.8 / 11
Outdoor Operation Range
(Cooling) (°F / °C)
Maximum 114.8 / 46 78.8 / 26 114.8 / 46 78.8 / 26
Minimum 0 / -17.8 - / - 0 / -17.8 - / -
Indoor Operation Range
(Heating) (°F / °C)
Maximum 86.0 / 30 - / - 86.0 / 30 - / -
Minimum 60.8 / 16 - / - 60.8 / 16 - / -
Outdoor Operation Range
(Heating) (°F / °C)
Maximum 75.2 / 24 64.4 / 18 75.2 / 24 64.4 / 18
Minimum -4 / -20 -2.2 / -19 -4 / -20 -2.2 / -19
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.

8
Model Indoor CS-RE18SKUA CS-RE24SKUA
Outdoor CU-RE18SKUA CU-RE24SKUA
Performance Test Condition ARI ARI
Power Supply Phase, Hz Single, 60 Single, 60
V 208 230 208 230
Min. Mid. Max. Min. Mid. Max. Min. Mid. Max. Min. Mid. Max.
Cooling
Capacity kW 1.70 5.04 5.27 1.70 5.04 5.27 1.70 6.45 6.74 1.70 6.45 6.74
BTU/h 5800 17200 18000 5800 17200 18000 5800 22000 23000 5800 22000 23000
Running Current A - 7.00 - - 6.30 - - 11.70 - - 10.50 -
Input Power W 430 1.40k 1.55k 430 1.40k 1.55k 430 2.39k 2.55k 430 2.39k 2.55k
EER W/W 3.95 3.60 3.40 3.95 3.60 3.40 3.95 2.70 2.64 3.95 2.70 2.64
Btu/hW 13.45 12.25 11.60 13.45 12.25 11.60 13.45 9.20 9.00 13.45 9.20 9.00
Power Factor % - 96 - - 97 - - 98 - - 99 -
Indoor Noise (H / L / QLo) dB-A 48 / 39 / 36 48 / 39 / 36 51 / 40 / 37 51 / 40 / 37
Power Level dB 64 / - / - 64 / - / - 67 / - / - 67 / - / -
Outdoor Noise (H / L / QLo) dB-A 53 / - / - 53 / - / - 54 / - / - 54 / - / -
Power Level dB 68 / - / - 68 / - / - 69 / - / - 69 / - / -
Heating
Capacity kW 1.70 5.28 6.12 1.70 5.28 6.12 1.70 8.45 7.44 1.70 8.45 7.44
BTU/h 5800 18000 20800 5800 18000 20800 5800 22000 25400 5800 22000 25400
Running Current A - 6.90 - - 6.20 - - 8.8 - - 7.9 -
Input Power W 380 1.38k 1.75k 380 1.38k 1.75k 380 1.78k 2.45k 380 1.78k 2.45k
COP W/W 4.47 3.82 3.50 4.47 3.82 3.50 4.47 3.62 3.04 4.47 3.62 3.04
Btu/hW 15.25 13.00 11.85 15.25 13.00 11.85 15.25 12.35 10.35 15.25 12.35 10.35
Power Factor % - 96 - - 97 - - 97 - - 98 -
Indoor Noise (H / L / QLo) dB-A 48 / 39 / 36 48 / 39 / 36 51 / 40 / 37 51 / 40 / 37
Power Level dB 64 / - / - 64 / - / - 67 / - / - 67 / - / -
Outdoor Noise (H / L / QLo) dB-A 54 / - / - 54 / - / - 55 / - / - 55 / - / -
Power Level dB 69 / - / - 69 / - / - 70 / - / - 70 / - / -
Max Current (A) / Max Input Power (W) 12.1 / 2.74k 12.5 / 2.87k
Starting Current (A) 7.0 11.7
Min Circuit Ampacity 15.0 20.0
Max. Overcurrent Protection 20.0 25.0
SEER / HSPF 16.00 / 8.50 16.00 / 8.50
Compressor
Type Hermetic Motor / Rotary Hermetic Motor / Rotary
Motor Type Brushless (4 poles) Brushless (4 poles)
Output Power W 900 900
Indoor Fan
Type Cross-flow fan Cross-flow fan
Material ASG30K1 ASG30K1
Motor Type DC (8 poles) DC (8 poles)
Input Power W 94.8 - 94.8 94.8 - 94.8
Output Power W 40 40
Speed
QLo rpm Cooling : 970
Heating : 1030
Cooling : 1000
Heating : 1110
Lo rpm Cooling : 1060
Heating : 1120
Cooling : 1090
Heating : 1220
Me rpm Cooling : 1220
Heating : 1260
Cooling : 1240
Heating : 1360
Hi rpm Cooling : 1380
Heating : 1410
Cooling : 1400
Heating : 1500
SHi rpm Cooling : 1480
Heating : 1500
Cooling : 1500
Heating : 1600

9
Model
Indoor CS-RE18SKUA CS-RE24SKUA
Outdoor CU-RE18SKUA CU-RE24SKUA
Outdoor Fan
Type Propeller Propeller
Material PP PP
Motor Type DC Motor (8 poles) DC Motor (8 poles)
Input Power W - -
Output Power W 40 40
Speed Hi rpm Cooling : 720
Heating : 700
Cooling : 740
Heating : 740
Moisture Removal L/h (Pt/h) 1.3 (2.7) 3.2 (6.8)
Indoor Airflow
QLo m3/min (ft3/min) Cooling : 12.73 (450)
Heating : 13.82 (488)
Cooling : 12.98 (458)
Heating : 14.49 (512)
Lo m3/min (ft3/min) Cooling : 14.11 (498)
Heating : 15.21 (537)
Cooling : 14.33 (506)
Heating : 16.13 (570)
Me m3/min (ft3/min) Cooling : 16.55 (584)
Heating : 17.38 (614)
Cooling : 16.59 (586)
Heating : 18.22 (643)
Hi m3/min (ft3/min) Cooling : 19.00 (670)
Heating : 19.70 (695)
Cooling : 19.00 (670)
Heating : 20.30 (715)
SHi m3/min (ft3/min) Cooling : 20.53 (725)
Heating : 21.09 (745)
Cooling : 20.50 (724)
Heating : 21.79 (769)
Outdoor
Airflow Hi m3/min (ft3/min) Cooling : 42.1 (1485)
Heating : 41.5 (1465)
Cooling : 43.2 (1525)
Heating : 42.6 (1505)
Refrigeration
Cycle
Control Device Expansion Valve Expansion Valve
Refrigerant Oil cm3 F50S (450) F50S (450)
Refrigerant Type g (oz) R410A, 1.24k (43.8) R410A, 1.32k (46.6)
Dimension
Height(I/D / O/D) mm (inch) 290 (11-7/16) / 695 (27-3/8) 290 (11-7/16) / 695 (27-3/8)
Width (I/D / O/D) mm (inch) 1070 (42-5/32) / 875 (34-15/32) 1070 (42-5/32) / 875 (34-15/32)
Depth (I/D / O/D) mm (inch) 240 (9-15/32) / 320 (12-5/8) 240 (9-15/32) / 320 (12-5/8)
Weight Net (I/D / O/D) kg (lb) 12 (26) 48 (106) 12 (26) 49 (108)
Piping
Pipe Diameter (Liquid / Gas) mm (inch) 6.35 (1/4) / 12.70 (1/2) 6.35 (1/4) / 15.88 (5/8)
Standard length m (ft) 7.5 (24.6) 7.5 (24.6)
Length range (min – max) m (ft) 3 (9.8) ~ 20 (65.6) 3 (9.8) ~ 20 (65.6)
I/D & O/D Height different m (ft) 15 (49.2) 15 (49.2)
Additional Gas Amount g/m (oz/ft) 20 (0.2) 20 (0.2)
Length for Additional Gas m (ft) 7.5 (24.6) 7.5 (24.6)
Drain Hose Inner Diameter mm (inch) 16.7 (5/8) 16.7 (5/8)
Length mm (inch) 650 (25-5/8) 650 (25-5/8)
Indoor Heat
Exchanger
Fin Material Aluminium (Pre Coat) Aluminium (Pre Coat)
Fin Type Slit Fin Slit Fin
Row × Stage × FPI 2 × 15 × 21 2 × 15 × 21
Size (W × H × L) inch 1 × 12-13/32 × 31-7/8 1 × 12-13/32 × 31-7/8
Outdoor
Heat
Exchanger
Fin Material Aluminium (Blue coated) Aluminium (Blue coated)
Fin Type Corrugate Fin Corrugate Fin
Row × Stage × FPI 2 × 31 × 19 2 × 31 × 19
Size (W × H × L) inch 1-13/32 × 25-5/8 × 33-5/8
32-15/32
1-13/32 × 25-5/8 × 33-5/8
32-15/32
Air Filter Material Polypropelene Polypropelene
Type One-touch One-touch
Power Supply Outdoor Outdoor
Power Supply Cord A - -
Thermostat - -
Protection Device - -

10
Model
Indoor CS-RE18SKUA CS-RE24SKUA
Outdoor CU-RE18SKUA CU-RE24SKUA
DRY BULB WET BULB DRY BULB WET BULB
Indoor Operation Range
(Cooling) (°F / °C)
Maximum 89.6 / 32 73.4 / 23 89.6 / 32 73.4 / 23
Minimum 60.8 / 16 51.8 / 11 60.8 / 16 51.8 / 11
Outdoor Operation Range
(Cooling) (°F / °C)
Maximum 114.8 / 46 78.8 / 26 114.8 / 46 78.8 / 26
Minimum 0 / -17.8 - / - 0 / -17.8 - / -
Indoor Operation Range
(Heating) (°F / °C)
Maximum 86.0 / 30 - / - 86.0 / 30 - / -
Minimum 60.8 / 16 - / - 60.8 / 16 - / -
Outdoor Operation Range
(Heating) (°F / °C)
Maximum 75.0 / 24 64.4 / 18 75.0 / 24 64.4 / 18
Minimum -4 / -20 -2.2 / -19 -4 / -20 -2.2 / -19
1. Cooling capacities are based on indoor temperature of 80°F DRY BULB, 67°F WET BULB and outdoor air temperature of 95°F DRY BULB,
75°F WET BULB.
2. Heating capacities are based on indoor temperature of 70°F DRY BULB, 60°F WET BULB and outdoor air temperature of 47°F DRY BULB,
43°F WET BULB.
3. Specifications are subjected to change without prior notice for further improvement.

11
3. Features
 Inverter Technology
o Wider output power range
o Energy saving
o Quick Cooling
o More precise temperature control
 Environment Protection
o Non-ozone depletion substances refrigerant (R410A)
 Long Installation Piping
o CS/CU-RE9/12SK, long piping up to 65 feet (20 meters)
o CS/CU-RE18/24SK, long piping up to 100 feet (30 meters)
 Easy to use remote control
 Quality Improvement
o Random auto restart after power failure for safety restart operation
o Gas leakage protection
o Prevent compressor reverse cycle
o Inner protector to protect Compressor
o Noise prevention during soft dry operation
 Operation Improvement
o Quiet mode to reduce the indoor unit operating sound
o Powerful mode to reach the desired room temperature quickly
 Serviceability Improvement
o Breakdown Self Diagnosis function

12
4. Location of Controls and Components
4.1 Indoor Unit
POWER
TIMER
POWERFUL
QUIET
Front Panel Air Filters
Aluminium Fin
Auto OFF/ON button
• Use when remote control is misplaced
or a malfunction occurs.
Remote control
receiver and Indicator
Indicator
POWER
TIMER
(Green)
(Orange)
POWERFUL (Orange)
QUIET (Orange)
Vertical airflow direction louver
• Do not adjust the flap by hand.
Horizontal airflow
direction louver
• Manually adjustable.
(RE9SK and RE12SK).
• Do not adjust by hand.
(RE18SK and RE24SK).
4.2 Outdoor Unit
Air inlet (rear)
A
ir inlet (side)
Air outlet
4.3 Remote Control
MODE
POWERFUL/
QUIET
TEMP
123
AIR SWING
FAN SPEED
SET CHECK CLOCK RESET
AC RC
FAN
SPEED
AIR
SWING
AUTO
HEAT
COOL
DRY
FAN
/
TEMP
OFF/ON
TIMER
SET
CANCEL
ON
OFF
1
2
3
CHE
MODE
POWERFUL/
QUIET
TIMER
CANCELOFF
123
FAN SPEED
SET CHECK CLOCK RESET
AC RC
AUTO
HEAT
COOL
DRY
FAN
FAN
SPEED
AIR
SWING
AIR SWING
/
TEMP
OFF/ON
TIMER
SET
CANCEL
ON
O
FF
1
2
3
Timer setting
Clock setting
Fan speed selection
Vertical airflow
direction selection
Remote control
display
OFF/ON
Operation mode
Temperature setting
Powerful/Sleep mode
operation
Check Check
Timer setting
Clock setting
Fan speed selection
Airflow direction
selection
Remote control
display
OFF/ON
Operation mode
Temperature setting
Powerful/Sleep mode
operation
RE9SK RE12SK RE18SK RE24SK

13
5. Dimensions
5.1 Indoor Unit
5.1.1 CS-RE9SKUA CS-RE12SKUA
7/8
1-7/8
5-1/4
Remote control
Remote control holder
2
2-3/8
5/8
10-3/8
Relative position between the indoor unit and the installation plate <Front View>
Unit: inch
29-29/64
5-1/16
3-3/4
1-11/16
9-17/32 9-17/32
5-1/16
Right
piping
hole
Left
piping
hole
Installation
plate
Indoor unit
external
dimensions
line
1717-9/32
MODE
POWERFUL/
QUIET
TEMP
123
AIR SWING
FAN SPEED
SET CHECK CLOCK RESET
AC RC
FAN
SPEED
AIR
SWING
AUTO
HEAT
COOL
DRY
FAN
TEMP
OFF/ON
TIMER
SET
CAN CEL
ON
OFF
1
2
3
CHE
(8-7/16)
11-7/16
2-13/32
1-49/64
8-7/16
1/32~1/16
1/32~1/16 34-9/32
4-17/32
(1-5/8~2-13/32)
16-1/8
Liquid side
Gas side
4-29/32
2-11/322-11/32
<Side View> <Side View>
<Top View>
<Front View>
<Bottom View>
<Rear View>
Air intake
direction
Air outlet
direction
Left piping
hole
Right piping
hole

14
5.1.2 CS-RE18SKUA CS-RE24SKUA
7/8
Remote control
Remote control holder
2
2-3/8
5/8
10-3/8
Relative position between the indoor unit and the installation plate <Front View>
Unit: inch
29-7/16
5-1/16
8-5/8
6-21/32
9-17/32 9-17/32
5-1/16
Right
piping
hole
Left
piping
hole
Installation
plate
Indoor unit
external
dimensions
line
20-15/1621-7/32
(9-15/32)
11-7/16
2-13/32
1-49/64
9-15/32
(1-39/64~2-13/32)16-9/64
4-17/324-29/32
2-11/32
42-5/32
2-11/32
<Side View> <Side View>
<Top View>
<Front View>
<Bottom View>
<Rear View>
Air intake
direction
Air outlet
direction
Left piping
hole
Right piping
hole
1/32~1/16 1/32~1/16
1-7/8
5-1/4
MODE
POWERFUL/
QUIET
TIMER
CANCELOFF
123
FAN SPEED
SET CHECK CLOCK RESET
AC RC
AUTO
HEAT
COOL
DRY
FAN
FAN
SPEED
AIR
SWING
AIR SWING
/
TEMP
OFF/ON
TIMER
SET
CANCEL
ON
O
FF
1
2
3

15
5.2 Outdoor Unit
5.2.1 CU-RE9SKUA CU-RE12SKUA
<Side View>
<Side View> <Front View>
<Top View>
Unit : inch
30-23/321 2-5/8
1/2
21-11/32
(3/4)
(2-3/4) (2-3/8)
11-13/32
1-3/86-1/8
3-3/8
22-1/2
(4-1/8) 4-1/8 2-3/8
2-way valve at Liquid side
(High Pressure)
3-way valve at Gas side
(Low Pressure)
Space necessary for
installation
Anchor Bolt Pitch
12-5/8 × 22-1/2
39-3/8
3-7/8
3-7/8
5.2.2 CU-RE18SKUA CU-RE24SKUA
Space necessary for
installation
Anchor Bolt Pitch
15-5/64 ×24-7/64
39-3/8
3-7/8
3-7/8
1-5/64 24-1/8 5-5/32
2-3/4
1-1/2
3-7/32
5-31/32
14-3/16
34-15/32
(5-5/32)
<Top View>
31-5/16
2-5/16 12-5/8
<Side View>
<Side View>
Unit: inch
<Front View>
2-61/64
2-17/32
(31/32)
2-3/4

16
6. Refrigeration Cycle Diagram
6.1 CU-RE9SKUA CU-RE12SKUA
INDOOR OUTDOOR
INTAKE
TEMP.
SENSOR
PIPE
TEMP.
SENSOR
INTAKE
TEMP.
SENSOR
PIPE
TEMP.
SENSOR
LIQUID
SIDE
2-WAY
VALVE
3-WAY
VALVE
GAS
SIDE
COOLING
HEAT EXCHANGER
(EVAPORATOR)
HEAT EXCHANGER
(CONDENSER)
HEATING
COMPRESSOR
COMPRESSOR
TEMP. SENSOR
4-WAY VALVE
STRAINER
EXPANSION
VALVE
DISCHARGE
MUFFLER

17
6.2 CU-RE18SKUA CU-RE24SKUA
INDOOR OUTDOOR
INTAKE
TEMP.
SENSOR
PIPE
TEMP.
SENSOR 1
PIPE
TEMP.
SENSOR 2
INTAKE
TEMP.
SENSOR
PIPE
TEMP.
SENSOR
LIQUID
SIDE
2-WAY
VALVE
3-WAY
VALVE
GAS
SIDE
COOLING
HEAT EXCHANGER
(EVAPORATOR)
HEAT EXCHANGER
(CONDENSER)
HEATING
COMPRESSOR
COMPRESSOR
DISC. SENSOR
4-WAY VALVE
STRAINER
EXPANSION
VALVE
DISCHARGE
MUFFLER
(RE18SKUA ONLY)
OIL SEPARATOR
(RE24SKUA ONLY)

18
7. Block Diagram
7.1 CS-RE9SKUA CU-RE9SKUA CS-RE12SKUA CU-RE12SKUA
FUSE 301
RY-AC PTC1
CT102
4-WAYS
VALVE
PTC
NTC TH3
REACTOR
IC19
RY-PWR
FUSE101
(INDOOR UNIT) (OUTDOOR UNIT)
U
TEMP.
FUSE
POWER
SUPPLY
1ø208/230V,
60Hz
FUSE 104
FUSE 102
SC
M
1 ~
M S
3 ~
L1 L2
1 2
NOISE FILTER
3
SC
U
FUSE103
M S
3 ~

19
7.2 CS-RE18SKUA CU-RE18SKUA CS-RE24SKUA CU-RE24SKUA
(INDOOR UNIT) (OUTDOOR UNIT)
M S
3 ~
FUSE 301
FUSE3
U
TEMP.
FUSE
SINGLE PHASE
POWER SUPPLY
1ø208/230V, 60Hz
FUSE2
FUSE1
DB2
DB1
DB3
Q1
P
N
U
V
W
NTC
CR3
TH1
NTC
TH2
SC M
1 ~
3
REACTOR
L1 L2
1 2
RY-PWR
RY-AC
PTC1 PTC2
RY-HOT
NOISE FILTER
SC
CT400
4-WAYS
VALVE
RY-C
M

20
8. Wiring Connection Diagram
8.1 Indoor Unit
8.1.1 CS-RE9SKUA CS-RE12SKUA
REMARKS
B : BLUE P : PINK
BR : BROWN O : ORANGE
BL : BLACK Y : YELLOW
W : WHITE G : GREEN
R : RED Y/G : YELLOW/GREEN
M
GROUNDING
TERMINAL
1
W
2
3
BL
EVAPORATOR
AC303 (WHT)
AC306 (BLK)
AC304 (RED)
G301 (GRN)
FUSE301
T3.15A L250V
TEMP.
FUSE
102°C
(3A)
TO
OUTDOOR
UNIT
TERMINAL
BOARD
R
Y/G
G
AUTO SW
(SW01)
ELECTRONIC
CONTROLLER
(MAIN)
CN–FM (WHT)
MOTOR
5
6
7
1
4
BL
W
B
Y
R
REMOTE CONTROLLER
ELECTRONIC CONTROLLER
(DISPLAY & RECEIVER)
CN–STM1
(WHT)
CN–RMT
(WHT)
4
1
1
BR
R
O
Y
P
5
1
5
6
1
M
CN−TH
(RED)
PIPING TEMP. SENSOR 2
(THERMISTOR)
PIPING TEMP. SENSOR 1
(THERMISTOR)
SUCTION TEMP. SENSOR
(THERMISTOR)
UP DOWN
LOUVER MOTOR
CN–DISP (WHT)
1
11
CN–DISP (YLW)
112
W W W W W W W
RECTIFICATION
CIRCUIT
NOISE FILTER
CIRCUIT
COMMUNICATION
CIRCUIT
t°
t°
t°