Panasonic RE12SKUA User Manual

Order No: PAPAMY1601005CE

/

O
1

2

3

/

1

2

3

FAN

AUTO
HEAT
COOL

DRY
FAN

MODE

POWERFUL/

QUIET

TIMER

1

SETCHECK CLOCK RESET

CHE

SPEED
AIR
SWING

OFF/ON

TEMP

TEMP

AIR SWING

FAN SPEED

SET

3

2

CANCELONOFF

AC

RC

Indoor Unit Outdoor Unit

CS-RE9SKUA
CS-RE12SKUA
CS-RE18SKUA

CU-RE9SKUA
CU-RE12SKUA
CU-RE18SKUA

AUTO
HEAT
COOL

DRY
FAN

MODE

POWERFUL/

QUIET

TIMER

TIMER

ON

1

FF

SETCHECK CLOCK RESET

CS-RE24SKUA

CU-RE24SKUA

Destination

USA

FAN
SPEED

AIR
SWING

OFF/ON

TEMP

AIR SWING

FAN SPEED

SET

3

2

CANCELOFF

CANCEL

AC

RC

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.

In order to avoid frostbite, be assured of no refrigerant leakage during the installation or repairing of refrigerant circuit.

PRECAUTION OF LOW TEMPERATURE

© Panasonic Corporation 2016.

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





2

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





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.

WARNING

CAUTION

 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.

This indication shows the possibility of causing death or serious injury

This indication shows the possibility of causing injury or damage to properties.

This symbol denotes item that is PROHIBITED from doing.

WARNING

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).

3

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.

WARNING

CAUTION

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.

4

2. Specification

Model

Performance Test Condition ARI ARI

Power Supply

Min. Mid. Max. Min. Mid. Max. Min. Mid. Max. Min. Mid. Max.

Capacity

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

Cooling

Heating

Compressor

Indoor Fan

Power Factor % - 98 - - 98 - - 99 - - 98 -

Indoor Noise (H / L / QLo)

Outdoor Noise (H / L / QLo)

Capacity

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

Power Factor % - 99 - - 98 - - 97 - - 99 -

Indoor Noise (H / L / QLo)

Outdoor Noise (H / L / QLo)

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

Type Hermetic Motor / Rotary Hermetic Motor / Rotary

Motor Type Brushless (6 poles) Brushless (6 poles)

Output Power W 700 700

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

QLo rpm

Lo rpm

Speed

Me rpm

Hi rpm

SHi rpm

Indoor CS-RE9SKUA CS-RE12SKUA

Outdoor CU-RE9SKUA CU-RE12SKUA

Phase, Hz Single, 60 Single, 60

V 208 230 208 230

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

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

dB-A 43 / 30 / 25 43 / 30 / 25 43 / 30 / 25 43 / 30 / 25

Power Level dB 59 / - / - 59 / - / - 59 / - / - 59 / - / -

dB-A 49 / - / - 49 / - / - 50 / - / - 50 / - / -

Power Level dB 64 / - / - 64 / - / - 65 / - / - 65 / - / -

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

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

dB-A 43 / 35 / 32 43 / 35 / 32 44 / 36 / 32 44 / 36 / 32

Power Level dB 59 / - / - 59 / - / - 60 / - / - 60 / - / -

dB-A 49 / - / - 49 / - / - 52 / - / - 52 / - / -

Power Level dB 64 / - / - 64 / - / - 67 / - / - 67 / - / -

Cooling : 610
Heating : 730
Cooling : 710
Heating : 830

Cooling : 910
Heating : 1040
Cooling : 1120
Heating : 1250
Cooling : 1250
Heating : 1300

Cooling : 620
Heating : 940

Cooling : 780
Heating : 1040
Cooling : 1000
Heating : 1210
Cooling : 1230
Heating : 1380
Cooling : 1350
Heating : 1430

5

Model

Indoor CS-RE9SKUA CS-RE12SKUA

Outdoor CU-RE9SKUA CU-RE12SKUA

Type Propeller Propeller

Material PP PP

Motor Type DC (8 poles) DC (8 poles)

Input Power W - -

Outdoor Fan

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

Outdoor

Airflow

3

QLo m

/min (ft3/min)

Lo m3/min (ft3/min)

Me m3/min (ft3/min)

Hi m3/min (ft3/min)

SHi m3/min (ft3/min)

3

Hi m

/min (ft3/min)

Cooling : 5.87 (207)
Heating : 6.95 (245)
Cooling : 7.07 (250)
Heating : 8.10 (286)
Cooling : 9.47 (334)

Heating : 10.50 (371)

Cooling : 12.0 (425)

Heating : 12.9 (455)
Cooling : 13.56 (479)
Heating : 13.47 (476)
Cooling : 29.8 (1050)
Heating : 29.8 (1050)

Cooling : 5.75 (203)
Heating : 9.30 (328)
Cooling : 7.60 (268)

Heating : 10.43 (368)
Cooling : 10.14 (358)
Heating : 12.36 (436)

Cooling : 12.8 (450)
Heating : 14.3 (505)

Cooling : 14.18 (501)
Heating : 14.87 (525)
Cooling : 31.0 (1095)
Heating : 31.0 (1095)

Control Device Expansion Valve Expansion Valve

Refrigeration

Cycle

Refrigerant Oil cm3 FV50S (320) FV50S (320)

Refrigerant Type g (oz) R410A, 900 (31.8) R410A, 900 (31.8)

Height(I/D / O/D) mm (inch) 290 (11-7/16) / 542 (21-11/32) 290 (11-7/16) / 542 (21-11/32)

Dimension

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)

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)

Piping

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)

Fin Material Aluminium (Pre Coat) Aluminium (Pre Coat)

Indoor Heat

Exchanger

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

Fin Material Aluminium (Blue coated) Aluminium (Blue coated)

Outdoor

Heat

Exchanger

Air Filter

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

Material Polypropelene Polypropelene

Type One-touch One-touch

Power Supply Outdoor Outdoor

Power Supply Cord A - -

Thermostat - -

Protection Device - -

6

Model

DRY BULB WET BULB DRY BULB WET BULB

Indoor Operation Range

(Cooling) (°F / °C)

Outdoor Operation Range

(Cooling) (°F / °C)

Indoor Operation Range

(Heating) (°F / °C)

Outdoor Operation Range

(Heating) (°F / °C)

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.

Indoor CS-RE9SKUA CS-RE12SKUA

Outdoor CU-RE9SKUA CU-RE12SKUA

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

Maximum 114.8 / 46 78.8 / 26 114.8 / 46 78.8 / 26

Minimum 0 / -17.8 - / - 0 / -17.8 - / -

Maximum 86.0 / 30 - / - 86.0 / 30 - / -

Minimum 60.8 / 16 - / - 60.8 / 16 - / -

Maximum 75.2 / 24 64.4 / 18 75.2 / 24 64.4 / 18

Minimum -4 / -20 -2.2 / -19 -4 / -20 -2.2 / -19

7

Model

Performance Test Condition ARI ARI

Power Supply

Min. Mid. Max. Min. Mid. Max. Min. Mid. Max. Min. Mid. Max.

Capacity

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

Cooling

Heating

Compressor

Indoor Fan

Power Factor % - 96 - - 97 - - 98 - - 99 -

Indoor Noise (H / L / QLo)

Outdoor Noise (H / L / QLo)

Capacity

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

Power Factor % - 96 - - 97 - - 97 - - 98 -

Indoor Noise (H / L / QLo)

Outdoor Noise (H / L / QLo)

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

Type Hermetic Motor / Rotary Hermetic Motor / Rotary

Motor Type Brushless (4 poles) Brushless (4 poles)

Output Power W 900 900

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

QLo rpm

Lo rpm

Speed

Me rpm

Hi rpm

SHi rpm

Indoor CS-RE18SKUA CS-RE24SKUA

Outdoor CU-RE18SKUA CU-RE24SKUA

Phase, Hz Single, 60 Single, 60

V 208 230 208 230

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

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

dB-A 48 / 39 / 36 48 / 39 / 36 51 / 40 / 37 51 / 40 / 37

Power Level dB 64 / - / - 64 / - / - 67 / - / - 67 / - / -

dB-A 53 / - / - 53 / - / - 54 / - / - 54 / - / -

Power Level dB 68 / - / - 68 / - / - 69 / - / - 69 / - / -

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

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

dB-A 48 / 39 / 36 48 / 39 / 36 51 / 40 / 37 51 / 40 / 37

Power Level dB 64 / - / - 64 / - / - 67 / - / - 67 / - / -

dB-A 54 / - / - 54 / - / - 55 / - / - 55 / - / -

Power Level dB 69 / - / - 69 / - / - 70 / - / - 70 / - / -

Cooling : 970
Heating : 1030
Cooling : 1060
Heating : 1120
Cooling : 1220
Heating : 1260
Cooling : 1380
Heating : 1410
Cooling : 1480
Heating : 1500

Cooling : 1000
Heating : 1110
Cooling : 1090
Heating : 1220
Cooling : 1240
Heating : 1360
Cooling : 1400
Heating : 1500
Cooling : 1500
Heating : 1600

8

Model

Indoor CS-RE18SKUA CS-RE24SKUA

Outdoor CU-RE18SKUA CU-RE24SKUA

Type Propeller Propeller

Material PP PP

Motor Type DC Motor (8 poles) DC Motor (8 poles)

Input Power W - -

Outdoor Fan

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

Outdoor

Airflow

3

QLo m

/min (ft3/min)

Lo m3/min (ft3/min)

Me m3/min (ft3/min)

Hi m3/min (ft3/min)

SHi m3/min (ft3/min)

3

Hi m

/min (ft3/min)

Cooling : 12.73 (450)
Heating : 13.82 (488)
Cooling : 14.11 (498)
Heating : 15.21 (537)
Cooling : 16.55 (584)
Heating : 17.38 (614)
Cooling : 19.00 (670)
Heating : 19.70 (695)
Cooling : 20.53 (725)
Heating : 21.09 (745)
Cooling : 42.1 (1485)
Heating : 41.5 (1465)

Cooling : 12.98 (458)
Heating : 14.49 (512)
Cooling : 14.33 (506)
Heating : 16.13 (570)
Cooling : 16.59 (586)
Heating : 18.22 (643)
Cooling : 19.00 (670)
Heating : 20.30 (715)
Cooling : 20.50 (724)
Heating : 21.79 (769)
Cooling : 43.2 (1525)
Heating : 42.6 (1505)

Control Device Expansion Valve Expansion Valve

Refrigeration

Cycle

Refrigerant Oil cm3 F50S (450) F50S (450)

Refrigerant Type g (oz) R410A, 1.24k (43.8) R410A, 1.32k (46.6)

Height(I/D / O/D) mm (inch) 290 (11-7/16) / 695 (27-3/8) 290 (11-7/16) / 695 (27-3/8)

Dimension

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)

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)

Piping

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)

Fin Material Aluminium (Pre Coat) Aluminium (Pre Coat)

Indoor Heat

Exchanger

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

Fin Material Aluminium (Blue coated) Aluminium (Blue coated)

Outdoor

Heat

Exchanger

Air Filter

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

Material Polypropelene Polypropelene

Type One-touch One-touch

Power Supply Outdoor Outdoor

Power Supply Cord A - -

Thermostat - -

Protection Device - -

9

Model

DRY BULB WET BULB DRY BULB WET BULB

Indoor Operation Range

(Cooling) (°F / °C)

Outdoor Operation Range

(Cooling) (°F / °C)

Indoor Operation Range

(Heating) (°F / °C)

Outdoor Operation Range

(Heating) (°F / °C)

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.

Indoor CS-RE18SKUA CS-RE24SKUA

Outdoor CU-RE18SKUA CU-RE24SKUA

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

Maximum 114.8 / 46 78.8 / 26 114.8 / 46 78.8 / 26

Minimum 0 / -17.8 - / - 0 / -17.8 - / -

Maximum 86.0 / 30 - / - 86.0 / 30 - / -

Minimum 60.8 / 16 - / - 60.8 / 16 - / -

Maximum 75.0 / 24 64.4 / 18 75.0 / 24 64.4 / 18

Minimum -4 / -20 -2.2 / -19 -4 / -20 -2.2 / -19

10

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

11

4. Location of Controls and Components

A

2

3

O

2

3

4.1 Indoor Unit

Aluminium Fin

Front Panel Air Filters

Auto OFF/ON button

• Use when remote control is misplaced
or a malfunction occurs.

Horizontal airflow
direction louver

• Manually adjustable.
(RE9SK and RE12SK).

• Do not adjust by hand.
(RE18SK and RE24SK).

4.2 Outdoor Unit

ir inlet (side)

POW

T

Remote control
receiver and Indicator

Vertical airflow direction louver

• Do not adjust the flap by hand.

Air inlet (rear)

ER

R

E

IM

L

U
F
R

POWE

T
E
I

QU

Indicator

POWER

TIMER

POWERFUL

QUIET

(Green)

(Orange)

(Orange)

(Orange)

Air outlet

4.3 Remote Control

OFF/ON

TEMP

TEMP

FAN SPEED

2

FAN
SPEED
AIR
SWING

AIR SWING

SET

3

CANCEL

AC

RC

Remote control

display

Operation mode

Temperature setting

Powerful/Sleep mode

operation

Check Check

AUTO
HEAT
COOL

DRY
FAN

MODE

POWERFUL/

QUIET

TIMER

ON

1

OFF

SET CHECK CLOCK RESET

CHE

RE9SK RE12SK

OFF/ON

Vertical airflow
direction selection
Fan speed selection

Timer setting

Clock setting

Remote control

Operation mode

Temperature setting

Powerful/Sleep mode

operation

12

display

AUTO
HEAT
COOL

DRY
FAN

MODE

POWERFUL/

QUIET

TIMER

TIMER

ON

1

FF

SET CHECK CLOCK RESET

OFF/ON

TEMP

FAN SPEED

2

FAN
SPEED

AIR
SWING

AIR SWING

SET

3

CANCELOFF

CANCEL

AC

RC

RE18SK RE24SK

OFF/ON

Airflow direction
selection

Fan speed selection
Timer setting

Clock setting

5. Dimensions

1

2

3

5.1 Indoor Unit

5.1.1 CS-RE9SKUA CS-RE12SKUA

<Side View> <Side View>

Air intake
direction

<Top View>

<Front View>

(8-7/16)

8-7/16

Left piping
hole

Air outlet
direction

1/32~1/16

<Bottom View>

4-29/32

<Rear View>

34-9/32

Gas side

Liquid side

1/32~1/16

2-11/322-11/32

4-17/32

11-7/16

Right piping
hole

Remote control

1-7/8

FAN

AUTO

SPEED

HEAT

AIR

COOL

SWING

DRY

FAN

OFF/ON

MODE

TEMP

TEMP

AIR SWING

POWERFUL/

FAN SPEED

QUIET

5-1/4

TIMER

SET

3

1

2

CANCELONOFF

AC

RC

SETCHECK CLOCK RESET

CHE

Remote control holder

2-3/8

2

2-13/32

1-49/64

7/8

16-1/8

(1-5/8~2-13/32)

Relative position between the indoor unit and the installation plate <Front View>

Installation
plate

Indoor unit
external
dimensions
line

29-29/64

Left
piping
hole

5-1/16

3-3/4

1-11/16

5-1/16

9-17/32 9-17/32

1717-9/32

Right
piping
hole

5/8

10-3/8

Unit: inch

13

5.1.2 CS-RE18SKUA CS-RE24SKUA

O
1

2

3

<Top View>

<Side View> <Side View>

Air intake

<Front View>

direction

(9-15/32)

9-15/32

Left piping
hole

Air outlet
direction

1/32~1/16

<Bottom View>

<Rear View>

2-11/32

42-5/32

1/32~1/16

2-11/32

11-7/16

2-13/32

1-49/64

Right piping
hole

Remote control

1-7/8

AUTO

FAN
SPEED

HEAT
COOL
DRY

AIR
SWING

FAN

OFF/ON

MODE

TEMP

POWERFUL/

AIR SWING

FAN SPEED

QUIET

5-1/4

TIMER

TIMER

SET

ON

3

1

2

FF

CANCELOFF

CANCEL

AC

4-17/324-29/32

SETCHECK CLOCK RESET

RC

7/8

Remote control holder

2-3/8

2

Installation
plate

Indoor unit
external
dimensions
line

(1-39/64~2-13/32)16-9/64

Relative position between the indoor unit and the installation plate <Front View>

29-7/16

20-15/1621-7/32

Left
piping
hole

8-5/8

6-21/32

5-1/16

5-1/16

9-17/32 9-17/32

14

Right
piping
hole

5/8

10-3/8

Unit: inch

5.2 Outdoor Unit

5.2.1 CU-RE9SKUA CU-RE12SKUA

Space necessary for

installation

3-7/8

<Top View>

(4-1/8)

30-23/321

22-1/2

2-5/8

4-1/8 2-3/8

1-3/86-1/8

3-7/8

39-3/8

Anchor Bolt Pitch

12-5/8 × 22-1/2

<Side View> <Front View>

Unit : inch

5.2.2 CU-RE18SKUA CU-RE24SKUA

<Top View>

Space necessary for

installation

3-7/8

3-7/8

39-3/8

1-5/64

(5-5/32)

34-15/32

24-1/8 5-5/32

2-3/4

3-3/8

2-way valve at Liquid side
(High Pressure)

3-way valve at Gas side
(Low Pressure)

1/2

21-11/32

(3/4)

(2-3/4) (2-3/8)

1-1/2

3-7/32

5-31/32

14-3/16

<Side View>

11-13/32

Anchor Bolt Pitch

15-5/64 × 24-7/64

<Side View>

Unit: inch

<Front View>

15

2-17/32

2-61/64

2-3/4

(31/32)

2-5/16

31-5/16

<Side View>

12-5/8

6. Refrigeration Cycle Diagram

6.1 CU-RE9SKUA CU-RE12SKUA

INDOOR OUTDOOR

INTAKE

TEMP.

SENSOR

HEAT EXCHANGER

(EVAPORATOR)

PIPE

TEMP.

SENSOR

LIQUID

SIDE

2-WAY
VALV E

GAS

SIDE

DISCHARGE

MUFFLER

EXPANSION

VALV E

INTAKE

TEMP.

SENSOR

HEAT EXCHANGER

(CONDENSER)

STRAINER

PIPE

TEMP.

SENSOR

COOLING
HEATING

3-WAY
VALV E

4-WAY VALVE

COMPRESSOR

TEMP. SENSOR

COMPRESSOR

16

6.2 CU-RE18SKUA CU-RE24SKUA

INDOOR OUTDOOR

INTAKE

TEMP.

SENSOR

HEAT EXCHANGER

(EVAPORATOR)

PIPE

TEMP.

SENSOR 1

PIPE

TEMP.

SENSOR 2

LIQUID

SIDE

2-WAY
VALV E

GAS

SIDE

DISCHARGE

MUFFLER

(RE18SKUA ONLY)

EXPANSION

VALV E

STRAINER

PIPE

TEMP.

SENSOR

INTAKE

TEMP.

SENSOR

HEAT EXCHANGER

(CONDENSER)

COOLING
HEATING

3-WAY
VALV E

4-WAY VALVE

OIL SEPARATOR

(RE24SKUA ONLY)

COMPRESSOR
DISC. SENSOR

COMPRESSOR

17

7. Block Diagram

7.1 CS-RE9SKUA CU-RE9SKUA CS-RE12SKUA CU-RE12SKUA

3 ~

M S

3 ~

M S

IC19

FUSE103

REACTOR

PTC

PTC1

RY-AC

FUSE 104

RY-PWR

FUSE101

1

TH3

NTC

FUSE 102

POWER

L1

SC

U

4-WAYS

VALV E

CT102

NOISE FILTER

60Hz

SUPPLY

1ø208/230V,

L2

2

3

(INDOOR UNIT) (OUTDOOR UNIT)

FUSE 301

M

U

1 ~

SC

18

TEMP.

FUSE

7.2 CS-RE18SKUA CU-RE18SKUA CS-RE24SKUA CU-RE24SKUA

3 ~

M S

V

U

W

NTC

TH2

FUSE1

REACTOR

CT400

P

N

M

DB3

Q1

RY-C

DB1

VALV E

RY-HOT

4-WAYS

CR3

SC

PTC1

RY-PWR

RY-AC

(INDOOR UNIT) (OUTDOOR UNIT)

PTC2

FUSE2

FUSE3

L1

SINGLE PHASE

POWER SUPPLY

L2

1ø208/230V, 60Hz

TH1

NTC

DB2

FUSE 301

M

U

1 ~

SC

NOISE FILTER

FUSE

3

2

1

TEMP.

19

8. Wiring Connection Diagram

8.1 Indoor Unit

8.1.1 CS-RE9SKUA CS-RE12SKUA

TERMINAL

TO
OUTDOOR
UNIT

BOARD

TEMP.
FUSE
102°C
(3A)

GROUNDING
TERMINAL

Y/G

1

2

3

BL

AC306 (BLK)

FUSE301

R

AC304 (RED)

G301 (GRN)

G

AC303 (WHT)

W

T3.15A L250V

COMMUNICATION

CIRCUIT

NOISE FILTER

CIRCUIT

4

(WHT)

CN–RMT

1

1

(WHT)

CN–STM1

5

REMARKS
B : BLUE P : PINK
BR : BROWN O : ORANGE
BL : BLACK Y : YELLOW
W : WHITE G : GREEN
R : RED Y/G : YELLOW/GREEN

BR

R

O

Y
P

1

UP DOWN

M

LOUVER MOTOR

5

EVAPORATOR

MOTOR

M

Y
B
W

BL

R

ELECTRONIC

CONTROLLER

7
6
5

4

1

CN–FM (WHT)

(MAIN)

RECTIFICATION

CIRCUIT

AUTO SW

(SW01)

CN–DISP (YLW)

1

WWWWW

11

CN–DISP (WHT)

ELECTRONIC CONTROLLER

(DISPLAY & RECEIVER)

(RED)

CN−TH

12

W

W

1

REMOTE CONTROLLER

6

t°

t°

t°

1

PIPING TEMP. SENSOR 2
(THERMISTOR)

PIPING TEMP. SENSOR 1
(THERMISTOR)

SUCTION TEMP. SENSOR
(THERMISTOR)

20

8.1.2 CS-RE18SKUA CS-RE24SKUA

TERMINAL

TO
OUTDOOR
UNIT

BOARD

1

2

3

TEMP.
FUSE
102°C
(3A)

GROUNDING
TERMINAL

Y/G

EVAPORATOR

MOTOR

M

AC306 (BLK)

BL

FUSE301

R

AC303 (WHT)

W

AC304 (RED)

G301 (GRN)

G

T3.15A L250V

COMMUNICATION

CIRCUIT

ELECTRONIC

CONTROLLER

Y
B

W

BL

R

7
6
5

4

1

CN–FM (WHT)

(MAIN)

NOISE FILTER

CIRCUIT

RECTIFICATION

CIRCUIT

CN–DISP (YLW)

1

AUTO SW

(SW01)

12

4

(WHT)

CN–RMT

1

1

(WHT)

CN–STM1

5

1

(YLW)

CN–STM2

5

6

(RED)

CN−TH

1

REMARKS
B : BLUE P : PINK
BR : BROWN O : ORANGE
BL : BLACK Y : YELLOW
W : WHITE G : GREEN
R : RED Y/G : YELLOW/GREEN

BR

R
O
Y
P

BR

R
O
Y
P

t°

t°

t°

1

UP DOWN

M

LOUVER MOTOR

5

1

LEFT RIGHT

M

LOUVER MOTOR

5

PIPING TEMP. SENSOR 2
(THERMISTOR)

PIPING TEMP. SENSOR 1
(THERMISTOR)

SUCTION TEMP. SENSOR
(THERMISTOR)

WWWWW

11

CN–DISP (WHT)

ELECTRONIC CONTROLLER

(DISPLAY & RECEIVER)

W

W

1

REMOTE CONTROLLER

21

8.2 Outdoor Unit

8.2.1 CU-RE9SKUA CU-RE12SKUA

SINGLE PHASE

POWER SUPPLY

BLK

GROUNDING TERMINAL

YLW/GRN

FAN MOTOR

L2L1

MS
3 ~

(BLK)

TO INDOOR UNIT

2

1

(WHT)

WHT

BLK

WHT

GRN

GRN

(RED)(WHT)(BLK)

3

(RED)

RED

DATA
(RED)

AC-BLK

(BLK)

FUSE101

(20A 250V)

AC-WHT

(WHT)

FG1

(GRN)

FG2

(GRN)

CN-MTR2

(WHT)

1
3
5

1

CN-MTR1

(WHT)

5

W

U
V

ELECTRONIC CONTROLLER

IC19

TERMINAL

BOARD

NOISE

FILTER

CIRCUIT

10

14
16

FUSE104

(15A 250V)

PFC

CIRCUIT

FUSE102

T3.15A L250V

GRY

RAT2
(GRY)

REACTOR

RECTIFICATION

CIRCUIT

GRY

RAT1

(GRY)

RECTIFICATION

T3.15A L250V

COMMUNICATION

CIRCUIT

CIRCUIT

SWITCHING

POWER

SUPPLY CIRCUIT

FUSE103

OUTDOOR AIR TEMP.
SENSOR
(THERMISTOR)

1

CN-TH
(WHT)

CN-TANK

(WHT)

CN-HOT

(WHT)

CN-STM

(WHT)

Q1

P

N

U

V

W

U (RED)

W (YLW)

t°

t°

4

PIPING TEMP. SENSOR
(THERMISTOR)

1

t°

3

COMP. TEMPERATURE
SENSOR (THERMISTOR)

YLW

1
3

YLW

ELECTRO-MAGNETIC
COIL (4-WAYS VALVE)

1

6

RED

BLU

V (BLU)

YLW

ELECTRO-MAGNETIC

M

COIL
(EXPANSION VALVE)

MS
3 ~

COMPRESSOR

REMARKS

BLACK: (BLK) RED: (RED)
WHITE: (WHT) BROWN: (BRW)
YELLOW: (YLW) GREEN: (GRN)
ORANGE: (ORG) GRAY: (GRY)
BLUE: (BLU) YELLOW/GREEN: (YLW/GRN)

Resistance of Compressor Windings

MODEL CU-RE9RKUA / CU-RE12RKUA

CONNECTION 5RS102XBC21

U-V 0.858 Ω

U-W 0.858 Ω

V-W 0.858 Ω

Note: Resistance at 20°C of ambient temperature.

BLUE (BLU)

YELLOW (YLW)

RED (RED)

(TRADEMARK)

COMP. TERMINAL

22

8.2.2 CU-RE18SKUA CU-RE24SKUA

TO INDOOR UNIT

(WHT)(BLK)

2

(WHT)

WHT

BOARD

RED

WHT

GRN

(RED)

(RED)

BLK

3

COM3
(RED)

AC-BLK

(BLK)

FUSE3

(20A 250V)

AC-WHT

(WHT)

FG01

(GRN)

CN-HOT

(BLU)

TERMINAL

BOARD

COMMUNICATION

RY-HOT

13

BLU
ELECTRO-MAGNETIC COIL

(4-WAYS VALVE)

CIRCUIT

NOISE FILTER

CIRCUIT

SINGLE PHASE

POWER SUPPLY

GROUNDING TERMINAL

YLW/GRN

YLW/GRN

CONTROL

CABINET

PLATE

SIDE

BLUE (BLU)

BOARD

YELLOW (YLW)

(TRADEMARK)

COMP. TERMINAL

L2L1

BLK

1

(BLK)

BLK

RED (RED)

WHT

CONTROL

Resistance of Compressor Windings

MODEL CU-RE18RKUA / CU-RE24RKUA

CONNECTION 5RD132XBA21

U-V 1.897 Ω

U-W 1.907 Ω

V-W 1.882 Ω

Note: Resistance at 20°C of ambient temperature.

REACTOR

GRY

L2-I

(GRY)

(T3.15A L250V)

PFC

CIRCUIT

CN-EV
(WHT)

M

ELECTRO-MAGNETIC COIL

(EXPANSION VALVE)

FUSE2

RECTIFICATION

CIRCUIT

16

REMARKS

BLU : BLUE BLK : BLACK
WHT : WHITE RED : RED
YLW : YELLOW GRY : GRAY
GRN : GREEN ORG : ORANGE
YLW/GRN : YELLOW/GREEN

GRY

L2-O

(GRY)

ELECTRONIC CONTROLLER

RECTIFICATION

CIRCUIT

(T2.5A L250V)

CN-TANK

(WHT)

13

t°

COMP. TEMP.
SENSOR
(THERMISTOR)

CN-TH1

t°

PIPING TEMP.
SENSOR
(THERMISTOR)

SWITCHING

POWER SUPPLY

CIRCUIT

Q10

P

N

FUSE1

(WHT)

14

t°

OUTDOOR AIR
TEMP. SENSOR
(THERMISTOR)

(RED) U

U

(BLU) V

V

(YLW) W

W

CN-DCFM

(WHT)

3

RED
BLU

YLW

1

RED

BLK
WHT
BLU
YLW

7

131

RED

BLU

YLW

COMPRESSOR

M

FAN MOTOR

MS
3 ~

23

9. Electronic Circuit Diagram

9.1 Indoor Unit

9.1.1 CS-RE9SKUA CS-RE12SKUA

M

1

5

UP DOWN

LOUVER MOTOR

Y

P

R

O

BR

15432

WHITE

IC03

CN-STM1

68

R46 1/2W

68

R47 1/2W

10

GND

8

12V

(MAIN)

16

1514131211

9

12V

1234567

ELECTRONIC CONTROLLER

VCC

(SW01)

AUTO SW

CIRCUIT

NOISE FILTER

FUSE301

T3.15A L250V

(BLK)

AC306

(WHT)

AC303

(RED)

AC304

G301

G

R

BL

W

SUCTION TEMP. SENSOR

(THERMISTOR)

t°

123

5V

CIRCUIT

COMMUNICATION

(GRN)

PIPING TEMP. SENSOR 2

(THERMISTOR)

PIPING TEMP. SENSOR 1

(THERMISTOR)

t°

t°

6

5

4

RED

*CN-TH

R61

R62

C27

C25

*R63 *C28

1µ

20.0k

1µ

15.0k

CIRCUIT

RECTIFICATION

(WHT)

CN–FM

5

6

7

B

Y

1

4

R

W

BL

Pipe Temp. Sensor

Intake Air Temp. Se nsor

112

Characteristics

16V

1%

16V

1%

5V

Sensor (Thermistor)

60

70

*C44*C41

*R75

*R78

*R77 *R74

*R89

5V

2

40

*R37

30

20

*C47

*R54

C3

16V

0.1µ

50

5V

5V

123456789

W

WWWWW

Resista nce (kΩ)

10

101112

W

*C49*C45

0

-10 0 10 20 30 40 50

Temperature (ºC)

4321

WHITE

*CN-RMT

YELLOW

*CN-DISP

1

BOARD

TERMINAL

3

2

102°C

TEMP.

FUSE

OUTDOOR

UNIT

TO

FAN

SPEED

HEAT

REMOTE CONTROLLER

AUTO

(3A)

AIR

COOL

SWING

DRY

GROUNDING

TERMINAL

OFF/ON

FAN

MODE

Y/G

AIR SWING

TEMP

TEMP

EVAPORATOR

MOTOR

SET

FAN SPEED

ON

QUIET

TIMER

POWERFUL/

987654321

11

M

ELECTRONIC CONTROLLER

RC

3

CANCEL

AC

2

CHE

1

OFF

SET CHECK CLOCK RESET

5V_

10

R202 2k

R201 470

1/10W 5%

123

Vout

LED201

(GREEN)

POWER

TIMER

Vcc

GND

54

GND GND

(DISPLAY & RECEIVER)

IC201

1/10W 5%

LED202

(ORANGE)

GND-A

*R203

(ORANGE)

POWERFUL

*R204

1/10W 5%

LED203

PCB201

QUIET

*CN-DISP

1/10W 5%

LED204

(ORANGE)

WHITE

24

9.1.2 CS-RE18SKUA CS-RE24SKUA

UP DOWN

LOUVER MOTOR

LEFT RIGHT

LOUVER MOTOR

M

BR

1

12V

16

9

12V

1234567

VCC

1

5

Y

P

R

O

543

2

1514131211

WHITE

CN-STM1

68

R46 1/2W

68

R47 1/2W

10

GND

8

12V

5V

BZ01

12V

VCC

IC03

(MAIN)

CIRCUIT

NOISE FILTER

ELECTRONIC CONTROLLER

(BLK)

AC306

BL

FUSE301

T3.15A L250V

R

(WHT)

AC303

W

AC304

M

1

Y

R

O

BR

1

2

1k

BZ

R30

16

1514131211

9

1234567

IC05

G301

(RED)

(GRN)

G

SUCTION TEMP. SENSOR

(THERMISTOR)

5

YELLOW

*CN-STM2

5V

GND

8

t°

123

P

543

10

(SW01)

AUTO SW

CIRCUIT

RECTIFICATION

CIRCUIT

COMMUNICATION

(WHT)

CN–FM

Y

PIPING TEMP. SENSOR 2

(THERMISTOR)

PIPING TEMP. SENSOR 1

(THERMISTOR)

t°

t°

6

5

4

5

6

7

B

W

BL

RED

*CN-TH

*R63 *C28

1µ

C27

1%

R61

20.0k

1µ

C25

1%

R62

15.0k

5V

5V

1

4

R

16V

16V

Pipe Temp. Sensor

Intake Air Temp . Sensor

112

Characteristics

Sensor (Thermistor)

2

Temperature (ºC)

-10 0 10 20 30 40 50

W

10

*C49*C45

101112

0

4321

WHITE

*CN-RMT

YELLOW

*CN-DISP

60

70

*C44*C41

*R75

*R78

*R77 *R74

*R89

5V

40

*R37

30

20

Resista nce (kΩ)

*C47

*R54

C3

16V

0.1µ

50

5V

5V

123456789

W

WWWWW

1

BOARD

TERMINAL

3

2

102°C

TEMP.

FUSE

(3A)

OUTDOOR

UNIT

TO

FAN

SPEED

HEAT

REMOTE CONTROLLER

AUTO

COOL

AIR

DRY

SWING

FAN

GROUNDING

TERMINAL

OFF/ON

MODE

Y/G

TEMP

EVAPORATOR

MOTOR

SET

AIR SWING

FAN SPEED

ON

QUIET

TIMER

TIMER

POWERFUL/

987654321

11

123

Vout

Vcc

GND

10

R201 470

1/10W 5%

LED201

(GREEN)

POWER

54

GND GND

R202 2k

1/10W 5%

(ORANGE)

TIMER

GND-A

*R203

LED202

1/10W 5%

LED203

(ORANGE)

POWERFUL

*R204

QUIET

PCB201

*CN-DISP

1/10W 5%

LED204

(ORANGE)

WHITE

M

(DISPLAY & RECEIVER)

ELECTRONIC CONTROLLER

RC

3

CANCELOFF

CANCEL

AC

2

FF

1

SET CHECK CLOCK RESET

5V_

IC201

25

9.2 Outdoor Unit

9.2.1 CU-RE9SKUA CU-RE12SKUA

SINGLE PHASE

POWER SUPPLY

BLK

GROUNDING TERMINAL

YLW/GRN

L2L1

TO INDOOR UNIT

1

(BLK)

WHT

BLK

FAN MOTOR

MS

3 ~

2

(WHT)

WHT

RED

GRN

GRN

(RED)(WHT)(BLK)

3

(RED)

1
3

5

ELECTRONIC

CONTROLLER

DATA
(RED)

AC-BLK

(BLK)

FUSE101

(20A 250V)

AC-WHT

(WHT)

FG1

(GRN)

FG2

(GRN)

CN-MTR2

(WHT)

CN-MTR1

1
2
3
4

5V

5

+

TERMINAL

R167

1k

*C173

BOARD

IC19

W

U
V

R166

C175

0.01µ
50V

G5G5

1k

GRY

RAT2

(GRY)

NOISE
FILTER

CIRCUIT

10

14
16

R156

1k

C177

0.01µ
50V

G5

FUSE104

(15A 250V)

PFC

CIRCUIT

C176

0.01µ
50V

G5

REACTOR

FUSE102

T3.15A L250V

GRY

13V

RAT1
(GRY)

VCC

9

1

2

3

IC12

4

5

6

7

GND

8

G2

RECTIFICATION

CIRCUIT

16

15

14

13

12

11

10

13V

VCC

9

1

2

3

IC19

4

5

6

7

GND

8

G2

COMMUNICATION

RECTIFICATION

FUSE103

T3.15A L250V

16

15

14

13

12

11

10

CIRCUIT

CIRCUIT

SWITCHING

POWER

SUPPLY CIRCUIT

C190

0.1µ
25V

13V

6

G2

D61

D63

5V

C6
1µ

10V

G8

C3
1µ

10V

G8

D9

G2

Q1

P

N

D60

D62

R11

15.8k

5V

5
4
3
2
1

CN-STM

R12

15.0k
1%

1%

C7
1µ

10V

G8

1
2
3
4

CN-TH

G8

WHITE

CN-TANK

WHITE

1
3

R1

4.99k
1%

G8

3
1

CN-HOT

(RED)

U

(BLU)

V

(YLW)

W

EXPANSION

M

VALVE

OUTDOOR TEMP.
SENSOR (15kΩ 3950)

PIPE TEMP.
SENSOR1 (4.96kΩ 3800)

TANK TEMP.
SENSOR (50kΩ 3950)

4-WAYS VALVE

RED
BLU

YLW

MS
3 ~

COMPRESSOR

70

60

50

40

30

Resistance (kΩ)

20

10

0

-10 0 10

Sensor (Thermistor)

Characteristics

1

Outdoor Air Sensor

2

Outdoor Heat Exchanger
Sensor

1

2

20 30 40 50

Temperature (

o

C)

26

Compressor Temp. Sensor

(Thermistor) Characteristics

70

60

50

40

30

Resistance (kΩ)

20

10

0

20 40 60

Temperature (

80 100 120 140

o

C)

9.2.2 CU-RE18SKUA CU-RE24SKUA

TO INDOOR UNIT

(WHT)(BLK)

2

(WHT)

WHT

RED

GRN

(RED)

3

(RED)

COM3
(RED)

AC-BLK

(BLK)

FUSE3

(20A 250V)

AC-WHT

(WHT)

FG01

(GRN)

TERMINAL

BOARD

COMMUNICATION

CIRCUIT

NOISE FILTER

CIRCUIT

SINGLE PHASE

POWER SUPPLY

GROUNDING TERMINAL

YLW/GRN

YLW/GRN

CONTROL

CABINET

PLATE

SIDE

BOARD

BLK

1

L2L1

(BLK)

WHT

BLK

GRY

L2-I

(GRY)

REACTOR

FUSE2

(T3.15A L250V)

GRY

L2-O

(GRY)

R101

15.8k

C46

1µ

6.3V

RECTIFICATION

CIRCUIT

6.3V

5V

15.0k

C45

1µ

5V

C49

R410

1µ

4.99k

10V

R100

SWITCHING

POWER SUPPLY

CIRCUIT

1
3

CN-TANK

COMP. TEMP. SENSOR
(THERMISTOR)
(50kΩ 3950)

OUTDOOR AIR TEMP.
SENSOR
(THERMISTOR)
(15kΩ 3950)

1
2
3
4

CN-TH1

PIPING TEMP. SENSOR
(THERMISTOR)
(4.96kΩ 3800)

CONTROL

BOARD

ELECTRONIC CONTROLLER

CN-HOT

(BLUE)

13V

VCC

9

1

16

2

15

3

14

IC7

4

13

5

12

6

11

7

RY-HOT

70

60

50

40

30

Resistance (kΩ)

20

10

0

10

GND

8

13

BLU
ELECTRO-MAGNETIC COIL
(4-WAYS VALVE)

Sensor (Thermistor)

Characteristics

1

2

-10 0 10

Temperature (

PFC

CIRCUIT

13V

VCC

9

1

16

2

15

3

14

IC7

4

13

5

12

6

11

7

10

GND

8

1

Outdoor Air Sensor

2

Outdoor Heat Exchanger
Sensor

20 30 40 50

o

C)

RECTIFICATION

CIRCUIT

*D33

*D34

*D35

*D36

*CN-EV

13V

123456

ELECTRO-MAGNETIC COIL

M

(EXPANSION VALVE)

Compressor Temp. Sensor

(Thermistor) Characteristics

70

60

50

40

30

Resistance (kΩ)

20

10

0

20 40 60

Temperature (

Q10

P

N

(T2.5A L250V)

*C84

80 100 120 140

o

C)

FUSE1

CN-DCFM

U
V

W

(WHT)

(RED)
(BLU)
(YLW)

RED

RED

BLU

BLU

MS

YLW

3 ~

YLW

COMPRESSOR

1

RED

BLK

WHT

BLU
YLW

7

M

FAN MOTOR

27

10. Printed Circuit Board

10.1 Indoor Unit

10.1.1 Main Printed Circuit Board

CN-FM

CN-RMT

JP1 (Random Auto Restart enable/disable)

10.1.2 Indicator Printed Circuit Board

CN-STM2
(RE18/24SKUA only)

CN-STM1

CN-MSENS

CN-DISP

CN-TH

CN-DISP

28

10.2 Outdoor Unit

10.2.1 Main Printed Circuit Board

10.2.1.1 CU-RE9SKUA CU-RE12SKUA

POWER
TRANSISTOR
(IPM)

CURRENT

TRANSFORMER

(CT)

AC-BLK

DATA

AC-WHT

CN-HOT

CN-STM

CN-TH

CN-TANK

CN-MTR1

CN-MTR2

29

10.2.1.2 CU-RE18SKUA CU-RE24SKUA

POWER

TRANSISTOR

(IPM)

CURRENT
TRANSFORMER
(CT)

CN-HOT

CN-DCFM

COM3

CN-TANK

CN-EV

CN-TH1

AC-WHT

AC-BLK

30