Panasonic CS-E18QB4RW User manual

© Panasonic Corporation 2014
Order No: PAPAMY1405050CE
Air Conditioner
Indoor Unit Outdoor Unit
CS-E12QB4RW
CS-E18QB4RW
CU-E12QB4R
CU-E18QB4R
Destination
Oceania
Please file and use this manual together with the service manual for Model No. CU-4E23QBR CU-4E27QBR CU-5E34QBR, Order
No. PAPAMY1404064CE
PRECAUTION OF LOW TEMPERATURE
In order to avoid frostbite, be assured of no refrigerant leakage during the installation or repairing of refrigerant circuit.
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.
WARNING

2
TABLE OF CONTENTS
PAGE PAGE
1. Safety Precautions .............................................3
2. Specifications .....................................................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 ...............................................14
6. Refrigeration Cycle Diagram ...........................15
7. Block Diagram ..................................................16
7.1 CS-E12QB4RW CU-E12QB4R .................16
7.2 CS-E18QB4RW CU-E18QB4R .................17
8. Wiring Connection Diagram ............................18
8.1 Indoor Unit ..................................................18
8.2 Outdoor Unit ...............................................19
9. Electronic Circuit Diagram ..............................21
9.1 Indoor Unit ..................................................21
9.2 Outdoor Unit ...............................................22
10. Printed Circuit Board .......................................24
10.1 Indoor Unit ..................................................24
10.2 Outdoor Unit ...............................................26
11. Installation Instruction.....................................29
11.1 Indoor Unit ..................................................29
11.2 Outdoor Unit ...............................................35
12. Operation Control.............................................40
12.1 Basic Function ............................................40
12.2 Indoor Fan Motor Operation .......................41
12.3 Outdoor Fan Motor Operation ....................42
12.4 Airflow Direction..........................................43
12.5 Quiet Operation (Cooling Mode/Cooling
Area of Dry Mode) ......................................43
12.6 Quiet Operation (Heating) ..........................44
12.7 Powerful Mode Operation...........................44
12.8 Timer Control..............................................44
12.9 Auto Restart Control...................................45
12.10 Indication Panel..........................................45
12.11 Drain Pump Control Operation ...................45
13. Protection Control............................................46
13.1 Protection Control For All Operations.........46
13.2 Protection Control For Cooling & Soft
Dry Operation .............................................48
13.3 Protection Control For Heating
Operation....................................................49
14. Servicing Mode.................................................51
14.1 Auto OFF/ON Button ..................................51
14.2 Remote Control Button...............................52
14.3 Outdoor PCB Test Run Operation
(For Pump Down/Servicing Purpose)........ 53
15. Troubleshooting Guide................................... 55
15.1 Refrigeration Cycle System....................... 55
15.2 Breakdown Self Diagnosis Function.......... 57
15.3 Error Codes Table ..................................... 58
15.4 Self-diagnosis Method............................... 60
16. Disassembly and Assembly Instructions ..... 84
16.1 Disassembly of Parts................................. 84
16.2 Outdoor Electronic Controller Removal
Procedure .................................................. 87
17. Technical Data ................................................. 89
17.1 Cool Mode Performance Data................... 89
17.2 Heat Mode Performance Data................... 90
18. Service Data ..................................................... 91
18.1 Cool Mode Outdoor Air Temperature
Characteristic............................................. 91
18.2 Heat Mode Outdoor Air Temperature
Characteristic............................................. 93
18.3 Piping Length Correction Factor................ 95
19. Exploded View and Replacement Parts
List .................................................................... 97
19.1 Indoor Unit ................................................. 97
19.2 CZ-BT20E (Front Grille Complete).......... 101
19.3 Outdoor Unit ............................................ 103

3
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 This indication shows the possibility of causing death or serious injury.
CAUTION This indication shows the possibility of causing injury or damage to properties.
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 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 install 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 electric 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 0.8 mm. Never use copper pipes thinner than 0.8 mm.
It is desirable that the amount of residual oil less than 40 mg/10 m.
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 caused suck-in of air, abnormal high pressure in refrigeration cycle and result in explosion,
injury etc).

4
WARNING
20. During pump down operation, stop the compressor before remove the refrigeration piping. (Removal of compressor while compressor is
operating and valves are opened 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 or 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 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 described 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 room air conditioner.
Use power supply cord 3 x 1.5 mm2(1.5HP), 3 x 2.5 mm2(2.0HP) type designation 60245 IEC 57 or heavier cord.
Connect the power supply cord of the air conditioner to the mains using one of the following method.
Power supply point should be in 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.
1) Power supply connection to the receptacle using power plug.
Use an approved 15/16A (1.5HP), 16A (2.0HP) power plug with earth pin for the connection to the socket.
2) Power supply connection to a circuit breaker for the permanent connection.
Use an approved 16A 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.

5
2. Specifications
Indoor CS-E12QB4RW
Model
Outdoor CU-E12QB4R
Performance Test Condition AS
Phase, Hz Single, 50
Power Supply
V 230 240
Min. Mid. Max. Min. Mid. Max.
kW 0.85 3.40 4.00 0.85 3.40 4.00
BTU/h 2900 11600 13600 2900 11600 13600
Capacity
kcal/h 730 2920 3440 730 2920 3440
Running Current A – 4.10 – – 3.90 –
Input Power W 220 880 1.18k 220 880 1.18k
Annual Consumption kWh – – – – – –
W/W 3.86 3.86 3.39 3.86 3.86 3.39
BTU/hW 13.18 13.18 11.53 13.18 13.18 11.53
EER
kcal/hW 3.32 3.32 2.92 3.32 3.32 2.92
Power Factor % – 93 – – 94 –
dB-A 35 / 26 / 23 35 / 26 / 23
Indoor Noise (H / L / QLo)
Power Level dB 51 / 42 / 39 51 / 42 / 39
dB-A 49 / – / – 49 / – / –
Cooling
Outdoor Noise (H / L / QLo)
Power Level dB 64 / – / – 64 / – / –
kW 0.85 4.00 5.40 0.85 4.00 5.40
BTU/h 2900 13600 18400 2900 13600 18400
Capacity
kcal/h 730 3440 4640 730 3440 4640
Running Current A – 4.80 – – 4.60 –
Input Power W 210 1.05k 1.68k 210 1.05k 1.68k
W/W 4.05 3.81 3.21 4.05 3.81 3.21
BTU/hW 13.81 12.95 10.95 13.81 12.95 10.95
COP
kcal/hW 3.48 3.28 2.76 3.48 3.28 2.76
Power Factor % – 95 – – 95 –
dB-A 37 / 28 / 25 37 / 28 / 25
Indoor Noise (H / L / QLo)
Power Level dB 53 / 44 / 41 53 / 44 / 41
dB-A 50 / – / – 50 / – / –
Heating
Outdoor Noise (H / L / QLo)
Power Level dB 65 / – / – 65 / – / –
Max Current (A) / Max Input Power (W) 7.60 / 1.68k
Starting Current (A) 4.80
Type Hermetic Motor (Rotary)
Motor Type Brushless (6-poles)
Compressor
Output Power W 700

6
Indoor CS-E12QB4RW
Model
Outdoor CU-E12QB4R
Type BACKWARD FAN
Material ABS
Motor Type DC / Transistor (8-poles)
Input Power W –
Output Power W 40
Cool rpm 330
QLo
Heat rpm 410
Cool rpm 370
Lo
Heat rpm 460
Cool rpm 460
Me
Heat rpm 540
Cool rpm 560
Hi
Heat rpm 630
Cool rpm 600
Indoor Fan
Speed
SHi
Heat rpm 680
Type Propeller Fan
Material PP
Motor Type DC (8-poles)
Input Power W –
Output Power W 40
Cool rpm 870
Outdoor Fan
Speed Hi
Heat rpm 900
Moisture Removal L/h (Pt/h) 2.0 (4.2)
Cool m3/min (ft3/min) 6.7 (240)
QLo
Heat m3/min (ft3/min) 8.0 (280)
Cool m3/min (ft3/min) 7.3 (260)
Lo
Heat m3/min (ft3/min) 8.8 (310)
Cool m3/min (ft3/min) 8.8 (310)
Me
Heat m3/min (ft3/min) 10.2 (360)
Cool m3/min (ft3/min) 10.5 (370)
Hi
Heat m3/min (ft3/min) 11.7 (415)
Cool m3/min (ft3/min) 11.2 (400)
Indoor
Airflow
SHi
Heat m3/min (ft3/min) 12.5 (440)
Cool m3/min (ft3/min) 35.3 (1245) 35.3 (1245)
Outdoor
Airflow Hi
Heat m3/min (ft3/min) 35.3 (1245) 35.3 (1245)
Control Device Capillary Tube
Refrigerant Oil cm3FV50S (320)
Refrigeration
Cycle
Refrigerant Type g (oz) R410A, 1.09k (38.5)
Height (I/D / O/D /
PANEL) mm (inch) 260 (10-1/4) / 619 (24-3/8) / 51 (2-1/32)
Width (I/D / O/D /
PANEL) mm (inch) 575 (22-21/32) / 824 (32-15/32) / 700 (27-9/16)
Dimension
Depth (I/D / O/D /
PANEL) mm (inch) 575 (22-21/32) / 299 (11-25/32) / 700 (27-9/16)
Weight Net (I/D / O/D /
PANEL) kg (lb) 18 (40) / 33 (73) / 2.5 (6)

7
Indoor CS-E12QB4RW
Model
Outdoor CU-E12QB4R
Pipe Diameter (Liquid / Gas) mm (inch) 6.35 (1/4) / 12.70 (1/2)
Standard length m (ft) 5.0 (16.4)
Length range (min – max) m (ft) 3 (9.8) ~ 15 (49.2)
I/D & O/D Height different m (ft) 15.0 (49.2)
Additional Gas Amount g/m (oz/ft) 20 (0.2)
Piping
Length for Additional Gas m (ft) 7.5 (24.6)
Inner Diameter mm 30
Drain Hose
Length mm 193
Fin Material Aluminium (Pre Coat)
Fin Type Slit Fin
Row × Stage × FPI 2 × 10 × 18
Indoor Heat
Exchanger
Size (W × H × L) mm 1330:1270 × 210 × 25.4
Fin Material Aluminium (Blue Coated)
Fin Type Corrugated Fin
Row × Stage × FPI 2 × 28 × 17
Outdoor
Heat
Exchanger
Size (W × H × L) mm 36.4 × 588 × 781.3:752.7
Material –
Air Filter
Type –
Power Supply Outdoor
Power Supply Cord A Nil
Thermostat Electronic Control
Protection Device Electronic Control
Dry Bulb Wet Bulb
Maximum °C 32 23
Cooling
Minimum °C 16 11
Maximum °C 30 –
Indoor
Operation
Range Heating
Minimum °C 16 –
Maximum °C 46 26
Cooling
Minimum °C 5 –
Maximum °C 24 18
Outdoor
Operation
Range Heating
Minimum °C -15 –
1. Cooling capacities are based on indoor temperature of 27°C Dry Bulb (80.6°F Dry Bulb), 19.0°C Wet Bulb (66.2°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
Indoor CS-E18QB4RW
Model
Outdoor CU-E18QB4R
Performance Test Condition AS
Phase, Hz Single, 50
Power Supply
V 230 240
Min. Mid. Max. Min. Mid. Max.
kW 0.90 4.80 5.70 0.90 4.80 5.70
BTU/h 3070 16400 19400 3070 16400 19400
Capacity
kcal/h 770 4130 4900 770 4130 4900
Running Current A – 6.50 – – 6.20 –
Input Power W 285 1.45k 1.93k 285 1.45k 1.93k
Annual Consumption kWh – – – – – –
W/W 3.16 3.31 2.95 3.16 3.31 2.95
BTU/hW 10.77 11.31 10.05 10.77 11.31 10.05
EER
kcal/hW 2.70 2.85 2.54 2.70 2.85 2.54
Power Factor % – 97 – – 97 –
dB-A 38 / 28 / 25 38 / 28 / 25
Indoor Noise (H / L / QLo)
Power Level dB 54 / 44 / 41 54 / 44 / 41
dB-A 48 / – / 43 48 / – / 43
Cooling
Outdoor Noise (H / L / QLo)
Power Level dB 62 / – / 57 62 / – / 57
kW 0.90 5.00 7.10 0.90 5.00 7.10
BTU/h 3070 17100 24200 3070 17100 24200
Capacity
kcal/h 770 4300 6110 770 4300 6110
Running Current A – 6.70 – – 6.50 –
Input Power W 330 1.51k 2.45k 330 1.51k 2.45k
W/W 2.73 3.31 2.90 2.73 3.31 2.90
BTU/hW 9.30 11.32 9.88 9.30 11.32 9.88
COP
kcal/hW 2.33 2.85 2.49 2.33 2.85 2.49
Power Factor % – 98 – – 97 –
dB-A 39 / 29 / 26 39 / 29 / 26
Indoor Noise (H / L / QLo)
Power Level dB 55 / 45 / 42 55 / 45 / 42
dB-A 49 / – / 44 49 / – / 44
Heating
Outdoor Noise (H / L / QLo)
Power Level dB 63 / – / 58 63 / – / 58
Max Current (A) / Max Input Power (W) 11.00 / 2.45k
Starting Current (A) 6.70
Type Hermetic Motor (Rotary)
Motor Type Brushless (4-poles)
Compressor
Output Power W 900

9
Indoor CS-E18QB4RW
Model
Outdoor CU-E18QB4R
Type BACKWARD FAN
Material ABS
Motor Type DC / Transistor (8-poles)
Input Power W –
Output Power W 40
Cool rpm 390
QLo
Heat rpm 430
Cool rpm 430
Lo
Heat rpm 450
Cool rpm 530
Me
Heat rpm 560
Cool rpm 630
Hi
Heat rpm 680
Cool rpm 680
Indoor Fan
Speed
SHi
Heat rpm 730
Type Propeller Fan
Material PP
Motor Type Induction (6-poles)
Input Power W –
Output Power W 40
Cool rpm 530 – 550
Outdoor Fan
Speed Hi
Heat rpm 530 – 550
Moisture Removal L/h (Pt/h) 2.6 (5.5)
Cool m3/min (ft3/min) 7.7 (270)
QLo
Heat m3/min (ft3/min) 8.3 (290)
Cool m3/min (ft3/min) 8.3 (290)
Lo
Heat m3/min (ft3/min) 8.7 (310)
Cool m3/min (ft3/min) 10.0 (350)
Me
Heat m3/min (ft3/min) 10.5 (370)
Cool m3/min (ft3/min) 11.7 (415)
Hi
Heat m3/min (ft3/min) 12.5 (440)
Cool m3/min (ft3/min) 12.5 (440)
Indoor
Airflow
SHi
Heat m3/min (ft3/min) 13.3 (470)
Cool m3/min (ft3/min) 46.7 (1650) 48.4 (1710)
Outdoor
Airflow Hi
Heat m3/min (ft3/min) 46.7 (1650) 48.4 (1710)
Control Device Expansion Valve
Refrigerant Oil cm3FV50S (450)
Refrigeration
Cycle
Refrigerant Type g (oz) R410A, 1.20k (42.4)
Height (I/D / O/D /
PANEL) mm (inch) 260 (10-1/4) / 795 (31-5/16) / 51 (2-1/32)
Width (I/D / O/D /
PANEL) mm (inch) 575 (22-21/32) / 875 (34-15/32) / 700 (27-9/16)
Dimension
Depth (I/D / O/D /
PANEL) mm (inch) 575 (22-21/32) / 320 (12-5/8) / 700 (27-9/16)
Weight Net (I/D / O/D) /
PANEL kg (lb) 18 (40) / 52 (115) / 2.5 (6)

10
Indoor CS-E18QB4RW
Model
Outdoor CU-E18QB4R
Pipe Diameter (Liquid / Gas) mm (inch) 6.35 (1/4) / 12.70 (1/2)
Standard length m (ft) 5.0 (16.4)
Length range (min – max) m (ft) 3 (9.8) ~ 30 (98.4)
I/D & O/D Height different m (ft) 20.0 (65.6)
Additional Gas Amount g/m (oz/ft) 20 (0.2)
Piping
Length for Additional Gas m (ft) 10.0 (32.8)
Inner Diameter mm 30
Drain Hose
Length mm 193
Fin Material Aluminium (Pre Coat)
Fin Type Slit Fin
Row × Stage × FPI 2 × 10 × 18
Indoor Heat
Exchanger
Size (W × H × L) mm 1330:1270 × 210 × 25.4
Fin Material Aluminium (Blue Coated)
Fin Type Corrugated Fin
Row × Stage × FPI 2 × 36 × 18
Outdoor
Heat
Exchanger
Size (W × H × L) mm 36.4 × 756 × 839:810.6
Material –
Air Filter
Type –
Power Supply Outdoor
Power Supply Cord A Nil
Thermostat Electronic Control
Protection Device Electronic Control
Dry Bulb Wet Bulb
Maximum °C 32 23
Cooling
Minimum °C 16 11
Maximum °C 30 –
Indoor
Operation
Range Heating
Minimum °C 16 –
Maximum °C 46 26
Cooling
Minimum °C 5 –
Maximum °C 24 18
Outdoor
Operation
Range Heating
Minimum °C -15 –
1. Cooling capacities are based on indoor temperature of 27°C Dry Bulb (80.6°F Dry Bulb), 19.0°C Wet Bulb (66.2°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.

11
3. Features
Inverter Technology
oWider output power range
oEnergy saving
oQuick Cooling
oQuick Heating
oMore precise temperature control
Environment Protection
oNon-ozone depletion substances refrigerant (R410A)
Long Installation Piping
oCS-E12QB4RW, CU-E12QB4R long piping up to 15 meters
oCS-E18QB4RW, CU-E18QB4R long piping up to 30 meters
Easy to use remote control
Quality Improvement
oRandom auto restart after power failure for safety restart operation
oGas leakage protection
oPrevent compressor reverse cycle
oInner protector to protect compressor
oNoise prevention during soft dry operation
Operation Improvement
oQuiet mode to reduce the indoor unit operating sound
oPowerful mode to reach the desired room temperature quickly
o24-hour timer setting
Serviceability Improvement
oBreakdown Self Diagnosis function

12
4. Location of Controls and Components
4.1 Indoor Unit
4.2 Outdoor Unit
4.3 Remote Control

13
5. Dimensions
5.1 Indoor Unit

14
5.2 Outdoor Unit
5.2.1 CU-E12QB4R
5.2.2 CU-E18QB4R

15
6. Refrigeration Cycle Diagram

16
7. Block Diagram
7.1 CS-E12QB4RW CU-E12QB4R

17
7.2 CS-E18QB4RW CU-E18QB4R

18
8. Wiring Connection Diagram
8.1 Indoor Unit

19
8.2 Outdoor Unit
8.2.1 CU-E12QB4R
Resistance of Compressor Windings
MODEL CU-E12QB4R
CONNECTION 5RS102XNA21
U-V 1.211 Ω
U-W 1.211 Ω
V-W 1.211 Ω
Note: Resistance at 20°C of ambient temperature.

20
8.2.2 CU-E18QB4R
Resistance of Outdoor Fan Motor Windings
Resistance of Compressor Windings
MODEL CU-E18QB4R MODEL CU-E18QB4R
CONNECTION CWA951620 CONNECTION 5RD132XBC21
YELLOW-BLUE 115.8 ΩU-V 1.897 Ω
YELLOW-ORANGE 71.71 ΩU-W 1.907 Ω
YELLOW-RED 116.2 ΩV-W 1.882 Ω
Note: Resistance at 20°C of ambient temperature. Note: Resistance at 20°C of ambient temperature.