Panasonic CS-XZ7SKEW User manual

© Panasonic Corporation 2016
Order No: PAPAMY1604028CE
Indoor Unit Outdoor Unit
CS-XZ7SKEW
CS-XZ9SKEW
CS-XZ12SKEW
CS-XZ18SKEW
CU-Z7SKE
CU-Z9SKE
CU-Z12SKE
CU-Z18SKE
Destination
EU
E.Europe
L.America
Turkey
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
CAUTION
Before performing any of the electrical installation works, please verify on which of the intended connection use. Generally
there are 2 types of indoor-outdoor connections:
○
A Single Connection (Single Indoor Unit connects with Single Outdoor Unit)
○
B Multiple Connection (Multiple Indoor Unit connect with Single Outdoor Unit)
Both connections have different connecting methods. Any mismatch connections will result in malfunctions.
The following illustration demonstrates the correct electrical works for both type.
○
A (Single Connection) ○ B (Multiple Connection)
32S1
Colour of wires (connection cable)
Terminals on the indoor unit
Terminals on the outdoor unit
L1N
(Power supply cord)
Terminals on the isolating devices
(Disconnecting means)
(L) (N)
32S1
Colour of wires (connection cable)
Terminals on the indoor unit
Terminals on the outdoor unit
(Power supply cord)
Terminals on the isolating devices
(Disconnecting means)
123
23
L1NS1
* Connection for multi inverter model
(Outdoor power supply)
Please refer to the provided Installation Instructions for the detailed procedures for connecting cables to Indoor Unit.

3
TABLE OF CONTENTS
PAGE PAGE
1.Safety Precautions.............................................4
2.Precaution for Using R32 Refrigerant..............6
3.Specifications ...................................................10
4.Features ............................................................18
5.Location of Controls and Components..........19
5.1Indoor Unit..................................................19
5.2Outdoor Unit ...............................................19
5.3Remote Control ..........................................19
6.Dimensions .......................................................20
6.1Indoor Unit..................................................20
6.2Outdoor Unit ...............................................21
7.Refrigeration Cycle Diagram...........................23
7.1CU-Z7SKE CU-Z9SKE CU-Z12SKE........23
7.2CU-Z18SKE................................................24
8.Block Diagram ..................................................25
8.1CU-Z7SKE CU-Z9SKE..............................25
8.2CU-Z12SKE................................................26
8.3CU-Z18SKE................................................27
9.Wiring Connection Diagram............................28
9.1Indoor Unit..................................................28
9.2Outdoor Unit ...............................................29
10.Electronic Circuit Diagram ..............................32
10.1Indoor Unit..................................................32
10.2Outdoor Unit ...............................................33
11.Printed Circuit Board .......................................36
11.1Indoor Unit..................................................36
11.2Outdoor Unit ...............................................39
12.Installation Instruction.....................................42
12.1Select the Best Location ............................42
12.2Indoor Unit..................................................43
12.3Outdoor Unit ...............................................48
13.Installation and Servicing Air Conditioner
using R32 ..........................................................52
13.1About R32 Refrigerant ...............................52
13.2Characteristics of R32 Refrigerant .............52
13.3Refrigerant piping installation • Tools used
in services ..................................................54
13.4New installation, Relocation, Repairing of
Refrigerant Cycle System The
Procedures .................................................58
13.5Piping installation of R32............................59
13.6Installation, Relocation, and Service..........60
13.7Repairing of refrigerant cycle / Brazing
point............................................................64
13.8<Reference> Analysis method for no error
code, no cooling / no warming ...................70
14.Operation Control.............................................72
14.1Basic Function............................................72
14.2Indoor Fan Motor Operation.......................73
14.3Outdoor Fan Motor Operation ....................74
14.4Airflow Direction .........................................75
14.5Quiet Operation (Cooling Mode/Cooling
Area of Dry Mode) ......................................77
14.6Quiet Operation (Heating) ..........................77
14.7Powerful Mode Operation ..........................77
14.8Timer Control..............................................78
14.9Sleep Mode Operation ...............................78
14.10Auto Restart Control...................................78
14.11Indication Panel..........................................79
14.12nanoe Operation.........................................79
14.13Mild Dry Cooling Operation ........................81
14.14ECONAVI Operation ..................................81
15.Operation Control (For Multi Split
Connection) ......................................................89
15.1Cooling operation .......................................89
15.2Soft Dry Operation......................................89
15.3Heating Operation ......................................89
15.4Automatic Operation ..................................90
15.5Indoor Fan Motor Operation.......................90
15.6Powerful Mode Operation ..........................90
15.7Auto Restart Control...................................90
15.8Indication Panel..........................................90
15.9Mild Dry Cooling Operation ........................90
16.Protection Control............................................91
16.1Protection Control for All Operations..........91
16.2Protection Control for Cooling & Soft Dry
Operation....................................................93
16.3Protection Control for Heating
Operation....................................................94
17.Servicing Mode.................................................95
17.1Auto OFF/ON Button..................................95
17.2Heat Only Operation ..................................96
17.3Remote Control Button...............................97
18.Troubleshooting Guide....................................98
18.1Refrigeration Cycle System........................98
18.2Breakdown Self Diagnosis Function ........100
18.3Error Codes Table....................................101
18.4Self-diagnosis Method..............................103
19.Disassembly and Assembly Instructions ....132
19.1Indoor Electronic Controllers, Cross Flow
Fan and Indoor Fan Motor Removal
Procedures ...............................................132
19.2Outdoor Electronic Controller Removal
Procedure.................................................139
20.Technical Data ................................................142
1.1Cool Mode Performance Data..................142
1.2Heat Mode Performance Data .................144
21.Service Data....................................................145
21.1Cool Mode Outdoor Air Temperature
Characteristic ...........................................145
21.2Heat Mode Outdoor Air Temperature
Characteristic ...........................................149
21.3Piping Length Correction Factor ..............153
22.Exploded View and Replacement Parts
List ...................................................................155
22.1Indoor Unit................................................155
22.2Outdoor Unit .............................................158

4
1. Safety Precautions
Read the following “SAFETY PRECAUTIONS” carefully before installation.
Electrical work must be installed by a licensed electrician. Be sure to use the correct rating of the power plug and main circuit
for the model to be 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 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 only.
The items to be followed are classified by the symbols:
Symbol with white background denotes item that is PROHIBITED.
Symbol with dark background denotes item that must be carried out.
Carry out test running to confirm that no abnormality occurs after the installation. 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.
This appliance is not intended for accessibility by the general public.
WARNING
1. Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manufacturer. Any
unfit method or using incompatible material may cause product damage, burst and serious injury.
2. Do not install outdoor unit near handrail of veranda. When installing air-conditioner unit on veranda of a high rise building, child
may climb up to outdoor unit and cross over the handrail causing an accident.
3. 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.
4.
The appliance shall be stored in a well ventilated room with indoor floor area larger than Amin (m2) [refer Table A] and without
any continuously operating ignition source. Keep away from open flames, any operating gas appliances or any operating
electric heater. Else, it may explode and cause injury or death.
5. Do not tie up the power supply cord into a bundle by band. Abnormal temperature rise on power supply cord may happen.
6. Do not insert your fingers or other objects into the unit, high speed rotating fan may cause injury.
7. Do not sit or step on the unit, you may fall down accidentally.
8.
The appliance shall be installed, and/or operated in a room with floor area larger than Amin (m2) [refer Table A] and keep away
from ignition sources, such as heat/sparks/open flame or hazardous areas such as gas appliances, gas cooking, reticulated gas
supply systems or electric cooking appliances, etc.
9. Keep plastic bag (packaging material) away from small children, it may cling to nose and mouth and prevent breathing.
10.
When installing or relocating 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.
11. Do not pierce or burn as the appliance is pressurized. Do not expose the appliance to heat, flame, sparks, or other sources of
ignition. Else, it may explode and cause injury or death.
12. Do not add or replace refrigerant other than specified type. It may cause product damage, burst and injury etc.
13.
Do not perform flare connection inside a building or dwelling or room, when joining the heat exchanger of indoor unit with
interconnecting piping. Refrigerant connection inside a building or dwelling or room must be made by brazing or welding. Joint
connection of indoor unit by flaring method can only be made at outdoor or at outside of a building or dwelling or room. Flare
connection may cause gas leak and flammable atmosphere.
14.
For R32 model, use piping, flare nut and tools which is specified for R32 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 for copper pipes used with R32 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.
15. Engage authorized dealer or specialist for installation. If installation done by the user is incorrect, it will cause water leakage, electrical
shock or fire.
16. For refrigeration system work, install according to this installation instructions strictly. If installation is defective, it will cause water
leakage, electrical shock or fire.

5
WARNING
17. Use the attached accessories parts and specified parts for installation. Otherwise, it will cause the set to fall, water leakage, fire or
electrical shock.
18. Install at a strong and firm location which is able to withstand weight of the set. If the strength is not enough or installation is not properly
done, the set will drop and cause injury.
19. For electrical work, follow the national regulation, legislation and this installation instructions. An independent circuit and single outlet
must be used. If electrical circuit capacity is not enough or defect found in the electrical work, it will cause electrical shock or fire.
20.
Do not use joint cable for indoor/outdoor connection cable. Use the specified indoor/outdoor connection cable, refer to instruction
CONNECT THE CABLE TO THE INDOOR UNIT and connect tightly for indoor/outdoor connection. Clamp the cable so that no external
force will have impact on the terminal. If connection or fixing is not perfect, it will cause heat up or fire at the connection.
21. 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 fire or electrical shock.
22.
This equipment is strongly recommended to be installed with Earth Leakage Circuit Breaker (ELCB) or Residual Current Device (RCD),
with sensitivity of 30mA at 0.1 sec or less. Otherwise, it may cause electrical shock and fire in case of equipment breakdown or
insulation breakdown.
23.
During installation, install the refrigerant piping properly before running the compressor. Operation of compressor without fixing
refrigeration piping and valves at opened position will cause suck-in of air, abnormal high pressure in refrigeration cycle and result in
explosion, injury etc.
24.
During pump down operation, stop the compressor before removing the refrigeration piping. Removal of refrigeration piping 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.
25. 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.
26. After completion of installation, confirm there is no leakage of refrigerant gas. It may generate toxic gas when the refrigerant contacts
with fire.
27. Ventilate if there is refrigerant gas leakage during operation. It may cause toxic gas when the refrigerant contacts with fire.
28. Be aware that refrigerants may not contain an odour.
29. 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 of equipment breakdown or insulation breakdown.
CAUTION
1. Do not install the unit in a place where leakage of flammable gas may occur. In case gas leaks and accumulates at surrounding
of the unit, it may cause fire.
2. Prevent liquid or vapor from entering sumps or sewers since vapor is heavier than air and may form suffocating atmospheres.
3. Do not release refrigerant during piping work for installation, re-installation and during repairing refrigeration parts. Take care of
the liquid refrigerant, it may cause frostbite.
4. Do not install this appliance in a laundry room or other location where water may drip from the ceiling, etc.
5. Do not touch the sharp aluminium fin, sharp parts may cause injury.
6. Carry out drainage piping as mentioned in installation instructions. If drainage is not perfect, water may enter the room and damage the
furniture.
7. Select an installation location which is easy for maintenance. Incorrect installation, service or repair of this air conditioner may increase
the risk of rupture and this may result in loss damage or injury and/or property.
8.
Power supply connection to the room air conditioner.
Use power supply cord 3 x 1.5 mm2(3/4 ~ 1.75HP), 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 (3/4 ~ 1.75HP), 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 (3/4 ~ 2.0HP) circuit breaker for the permanent connection. It must be a double pole switch with a minimum
3.0 mm contact gap.
9. Installation work.
It may need two people to carry out the installation work.

6
WARNING
CAUTION
2. Precaution for Using R32 Refrigerant
The basic installation work procedures are the same as conventional refrigerant (R410A, R22) models.
However, pay careful attention to the following points:
1.
Since the working pressure is higher than that of refrigerant R22 models, some of the piping and installation and service tools are
special.
(See “2.1. Special tools for R32 (R410A)”.)
Especially, when replacing a refrigerant R22 model with a new refrigerant R32 model, always replace the conventional piping and flare
nuts with the R32 and R410A piping and flare nuts on the outdoor unit side.
For R32 and R410A, the same flare nut on the outdoor unit side and pipe can be used.
2.
Models that use refrigerant R32 and R410A have a different charging port thread diameter to prevent erroneous charging with refrigerant
R22 and for safety.
Therefore, check beforehand. [The charging port thread diameter for R32 and R410A is 12.7 mm (1/2 inch).]
3. Be more careful than R22 so that foreign matter (oil, water, etc.) does not enter the piping.
Also, when storing the piping, securely seal the opening by pinching, taping, etc. (Handling of R32 is similar to R410A.)
1.
Installation (Space)
Must ensure the installation of pipe-work shall be kept to a minimum. Avoid use dented pipe and do not allow acute bending.
Must ensure that pipe-work shall be protected from physical damage.
Must comply with national gas regulations, state municipal rules and legislation. Notify relevant authorities in accordance with all
applicable regulations.
Must ensure mechanical connections be accessible for maintenance purposes.
In cases that require mechanical ventilation, ventilation openings shall be kept clear of obstruction.
When disposal of the product, do follow to the precautions in #12 and comply with national regulations.
Always contact to local municipal offices for proper handling.
Interconnecting refrigerant pipework, i.e. pipework external to the unitary components, should be marked with a Class label (see
Figure 9.1 of Code of Practice) every two metres where the pipework is visible. This includes pipework located in a ceiling space or
any void which a person may access for maintenance or repair work within that space.
2.
Servicing
2-1. Service personnel
Any qualified person who is involved with working on or breaking into a refrigerant circuit should hold a current valid certificate from
an industry-accredited assessment authority, which authorizes their competence to handle refrigerants safely in accordance with an
industry recognized assessment specification.
Servicing shall only be performed as recommended by the equipment manufacturer. Maintenance and repair requiring the
assistance of other skilled personnel shall be carried out under the supervision of the person competent in the use of flammable
refrigerants.
Servicing shall be performed only as recommended by the manufacturer.
2-2. Work
Prior to beginning work on systems containing flammable refrigerants, safety checks are necessary to ensure that the risk of
ignition is minimised.
For repair to the refrigerating system, the precautions in #2-2 to #2-8 must be followed before conducting work on the system.
Work shall be undertaken under a controlled procedure so as to minimize the risk of a flammable gas or vapour being present while
the work is being performed.
All maintenance staff and others working in the local area shall be instructed and supervised on the nature of work being carried
out.
Avoid working in confined spaces.
Wear appropriate protective equipment, including respiratory protection, as conditions warrant.
Ensure that the conditions within the area have been made safe by limit of use of any flammable material. Keep all sources of
ignition and hot metal surfaces away.
2-3. Checking for presence of refrigerant
The area shall be checked with an appropriate refrigerant detector prior to and during work, to ensure the technician is aware of
potentially flammable atmospheres.
Ensure that the leak detection equipment being used is suitable for use with flammable refrigerants, i.e. non sparking, adequately
sealed or intrinsically safe.
In case of leakage/spillage happened, immediately ventilate area and stay upwind and away from spill/release.
In case of leakage/spillage happened, do notify persons downwind of the leaking/spill, isolate immediate hazard area and keep
unauthorized personnel out.
2-4. Presence of fire extinguisher
If any hot work is to be conducted on the refrigeration equipment or any associated parts, appropriate fire extinguishing equipment
shall be available at hand.
Have a dry powder or CO2fire extinguisher adjacent to the charging area.

7
CAUTION
2-5. No ignition sources
No person carrying out work in relation to a refrigeration system which involves exposing any pipe work that contains or has
contained flammable refrigerant shall use any sources of ignition in such a manner that it may lead to the risk of fire or explosion.
He/She must not be smoking when carrying out such work.
All possible ignition sources, including cigarette smoking, should be kept sufficiently far away from the site of installation, repairing,
removing and disposal, during which flammable refrigerant can possibly be released to the surrounding space.
Prior to work taking place, the area around the equipment is to be surveyed to make sure that there are no flammable hazards or
ignition risks.
“No Smoking” signs shall be displayed.
2-6. Ventilated area
Ensure that the area is in the open or that it is adequately ventilated before breaking into the system or conducting any hot work.
A degree of ventilation shall continue during the period that the work is carried out.
The ventilation should safely disperse any released refrigerant and preferably expel it externally into the atmosphere.
2-7. Checks to the refrigeration equipment
Where electrical components are being changed, they shall be fit for the purpose and to the correct specification.
At all times the manufacturer’s maintenance and service guidelines shall be followed.
If in doubt consult the manufacturer’s technical department for assistance.
The following checks shall be applied to installations using flammable refrigerants.
- The charge size is in accordance with the room size within which the refrigerant containing parts are installed.
- The ventilation machinery and outlets are operating adequately and are not obstructed.
- If an indirect refrigerating circuit is being used, the secondary circuit shall be checked for the presence of refrigerant.
- Marking to the equipment continues to be visible and legible. Markings and signs that are illegible shall be corrected.
- Refrigeration pipe or components are installed in a position where they are unlikely to be exposed to any substance
which may corrode refrigerant containing components, unless the components are constructed of materials which are
inherently resistant to being corroded or are properly protected against being so corroded.
2-8. Checks to electrical devices
Repair and maintenance to electrical components shall include initial safety checks and component inspection procedures.
Initial safety checks shall include but not limit to:-
- That capacitors are discharged: this shall be done in a safe manner to avoid possibility of sparking.
- That there is no live electrical components and wiring are exposed while charging, recovering or purging the system.
- That there is continuity of earth bonding.
At all times the manufacturer’s maintenance and service guidelines shall be followed.
If in doubt consult the manufacturer’s technical department for assistance.
If a fault exists that could compromise safety, then no electrical supply shall be connected to the circuit until it is satisfactorily dealt
with.
If the fault cannot be corrected immediately but it is necessary to continue operation, an adequate temporary solution shall be used.
The owner of the equipment must be informed or reported so all parties are advised thereinafter.
3.
Repairs to sealed components
During repairs to sealed components, all electrical supplies shall be disconnected from the equipment being worked upon prior to
any removal of sealed covers, etc.
If it is absolutely necessary to have an electrical supply to equipment during servicing, then a permanently operating form of leak
detection shall be located at the most critical point to warn of a potentially hazardous situation.
Particular attention shall be paid to the following to ensure that by working on electrical components, the casing is not altered in
such a way that the level of protection is affected. This shall include damage to cables, excessive number of connections, terminals
not made to original specification, damage to seals, incorrect fitting of glands, etc.
Ensure that apparatus is mounted securely.
Ensure that seals or sealing materials have not degraded such that they no longer serve the purpose of preventing the ingress of
flammable atmospheres.
Replacement parts shall be in accordance with the manufacturer’s specifications.
NOTE: The use of silicon sealant may inhibit the effectiveness of some types of leak detection equipment.
Intrinsically safe components do not have to be isolated prior to working on them.
4.
Repair to intrinsically safe components
Do not apply any permanent inductive or capacitance loads to the circuit without ensuring that this will not exceed the permissible
voltage and current permitted for the equipment in use.
Intrinsically safe components are the only types that can be worked on while live in the presence of a flammable atmosphere.
The test apparatus shall be at the correct rating.
Replace components only with parts specified by the manufacturer. Unspecified parts by manufacturer may result ignition of
refrigerant in the atmosphere from a leak.
5.
Cabling
Check that cabling will not be subject to wear, corrosion, excessive pressure, vibration, sharp edges or any other adverse
environmental effects.
The check shall also take into account the effects of aging or continual vibration from sources such as compressors or fans.
6.
Detection of flammable refrigerants
Under no circumstances shall potential sources of ignition be used in the searching or detection of refrigerant leaks.
A halide torch (or any other detector using a naked flame) shall not be used.

8
CAUTION
7.
Leak detection methods
Electronic leak detectors shall be used to detect flammable refrigerants, but the sensitivity may not be adequate, or may need re-
calibration.
(Detection equipment shall be calibrated in a refrigerant-free area.)
Ensure that the detector is not a potential source of ignition and is suitable for the refrigerant used.
Leak detection equipment shall be set at a percentage of the LFL of the refrigerant and shall be calibrated to the refrigerant
employed and the appropriate percentage of gas (25 % maximum) is confirmed.
Leak detection fluids are suitable for use with most refrigerants but the use of detergents containing chlorine shall be avoided as the
chlorine may react with the refrigerant and corrode the copper pipe-work.
If a leak is suspected, all naked flames shall be removed/extinguished.
If a leakage of refrigerant is found which requires brazing, all of the refrigerant shall be recovered from the system, or isolated (by
means of shut off valves) in a part of the system remote from the leak. Oxygen free nitrogen (OFN) shall then be purged through
the system both before and during the brazing process.
8.
Removal and evacuation
When breaking into the refrigerant circuit to make repairs – or for any other purpose – conventional procedures shall be used.
However, it is important that best practice is followed since flammability is a consideration.
The following procedure shall be adhered to:
• remove refrigerant -> • purge the circuit with inert gas -> • evacuate -> • purge again with inert gas ->
• open the circuit by cutting or brazing
The refrigerant charge shall be recovered into the correct recovery cylinders.
The system shall be “flushed” with OFN to render the unit safe.
This process may need to be repeated several times.
Compressed air or oxygen shall not be used for this task.
Flushing shall be achieved by breaking the vacuum in the system with OFN and continuing to fill until the working pressure is
achieved, then venting to atmosphere, and finally pulling down to a vacuum.
This process shall be repeated until no refrigerant is within the system.
When the final OFN charge is used, the system shall be vented down to atmospheric pressure to enable work to take place.
This operation is absolutely vital if brazing operations on the pipe work are to take place.
Ensure that the outlet for the vacuum pump is not close to any ignition sources and there is ventilation available.
9.
Charging procedures
In addition to conventional charging procedures, the following requirements shall be followed.
- Ensure that contamination of different refrigerants does not occur when using charging equipment.
- Hoses or lines shall be as short as possible to minimize the amount of refrigerant contained in them.
- Cylinders shall be kept upright.
- Ensure that the refrigeration system is earthed prior to charging the system with refrigerant.
- Label the system when charging is complete (if not already).
- Extreme care shall be taken not to over fill the refrigeration system.
Prior to recharging the system it shall be pressure tested with OFN (refer to #7).
The system shall be leak tested on completion of charging but prior to commissioning.
A follow up leak test shall be carried out prior to leaving the site.
Electrostatic charge may accumulate and create a hazardous condition when charging and discharging the refrigerant.
To avoid fire or explosion, dissipate static electricity during transfer by grounding and bonding containers and equipment before
charging/discharging.
10.
Decommissioning
Before carrying out this procedure, it is essential that the technician is completely familiar with the equipment and all its details.
It is recommended good practice that all refrigerants are recovered safely.
Prior to the task being carried out, an oil and refrigerant sample shall be taken in case analysis is required prior to re-use of
reclaimed refrigerant.
It is essential that electrical power is available before the task is commenced.
a) Become familiar with the equipment and its operation.
b) Isolate system electrically.
c) Before attempting the procedure ensure that:
• mechanical handling equipment is available, if required, for handling refrigerant cylinders;
• all personal protective equipment is available and being used correctly;
• the recovery process is supervised at all times by a competent person;
• recovery equipment and cylinders conform to the appropriate standards.
d) Pump down refrigerant system, if possible.
e) If a vacuum is not possible, make a manifold so that refrigerant can be removed from various parts of the system.
f) Make sure that cylinder is situated on the scales before recovery takes place.
g) Start the recovery machine and operate in accordance with manufacturer’s instructions.
h) Do not over fill cylinders. (No more than 80 % volume liquid charge).
i) Do not exceed the maximum working pressure of the cylinder, even temporarily.
j) When the cylinders have been filled correctly and the process completed, make sure that the cylinders and the
equipment are removed from site promptly and all isolation valves on the equipment are closed off.
k) Recovered refrigerant shall not be charged into another refrigeration system unless it has been cleaned and checked.
Electrostatic charge may accumulate and create a hazardous condition when charging or discharging the refrigerant.
To avoid fire or explosion, dissipate static electricity during transfer by grounding and bonding containers and equipment before
charging/discharging.

9
CAUTION
11.
Labelling
Equipment shall be labelled stating that it has been de-commissioned and emptied of refrigerant.
The label shall be dated and signed.
Ensure that there are labels on the equipment stating the equipment contains flammable refrigerant.
12.
Recovery
When removing refrigerant from a system, either for servicing or decommissioning, it is recommended good practice that all
refrigerants are removed safely.
When transferring refrigerant into cylinders, ensure that only appropriate refrigerant recovery cylinders are employed.
Ensure that the correct number of cylinders for holding the total system charge are available.
All cylinders to be used are designated for the recovered refrigerant and labelled for that refrigerant (i.e. special cylinders for the
recovery of refrigerant).
Cylinders shall be complete with pressure relief valve and associated shut-off valves in good working order.
Recovery cylinders are evacuated and, if possible, cooled before recovery occurs.
The recovery equipment shall be in good working order with a set of instructions concerning the equipment that is at hand and shall
be suitable for the recovery of flammable refrigerants.
In addition, a set of calibrated weighing scales shall be available and in good working order.
Hoses shall be complete with leak-free disconnect couplings and in good condition.
Before using the recovery machine, check that it is in satisfactory working order, has been properly maintained and that any
associated electrical components are sealed to prevent ignition in the event of a refrigerant release.
Consult manufacturer if in doubt.
The recovered refrigerant shall be returned to the refrigerant supplier in the correct recovery cylinder, and the relevant Waste
Transfer Note arranged.
Do not mix refrigerants in recovery units and especially not in cylinders.
If compressors or compressor oils are to be removed, ensure that they have been evacuated to an acceptable level to make certain
that flammable refrigerant does not remain within the lubricant.
The evacuation process shall be carried out prior to returning the compressor to the suppliers.
Only electric heating to the compressor body shall be employed to accelerate this process.
When oil is drained from a system, it shall be carried out safely.

10
3. Specifications
Model Indoor CS-XZ7SKEW CS-XZ9SKEW
Outdoor CU-Z7SKE CU-Z9SKE
Performance Test Condition EUROVENT EUROVENT
Power Supply Phase, Hz Single, 50 Single, 50
V 230 230
Min. Mid. Max. Min. Mid. Max.
Cooling
Capacity
kW 0.75 2.05 2.40 0.85 2.50 3.00
BTU/h 2560 6990 8180 2900 8530 10200
Kcal/h 650 1760 2060 730 2150 2580
Running Current A – 2.15 – – 2.50 –
Input Power W 240 450 555 240 525 715
Annual Consumption kWh – 225 – – 263 –
EER
W/W 3.13 4.56 4.32 3.54 4.76 4.20
BTU/hW 10.67 15.53 14.74 12.08 16.25 14.27
Kcal/hW 2.71 3.91 3.71 3.04 4.10 3.61
ErP
Pdesign kW 2.1 2.5
SEER (W/W) 7.5 8.5
Annual
Consumption kWh 98 103
Class A++ A+++
Power Factor % – 91 – – 91 –
Indoor Noise (H / L / QLo)
dB-A 37 / 24 / 19 39 / 25 / 19
Power Level dB 53 / – 55 / –
Outdoor Noise (H / L)
dB-A 45 / – 46 / –
Power Level dB 60 / – 61 / –
Heating
Capacity
kW 0.70 2.80 4.00 0.80 3.40 5.00
BTU/h 2390 9550 13600 2730 11600 17100
Kcal/h 600 2410 3440 690 2920 4300
Running Current A – 2.80 – – 3.30 –
Input Power W 180 620 990 180 720 1.27k
COP
W/W 3.89 4.52 4.04 4.44 4.72 3.94
BTU/hW 13.28 15.40 13.74 15.17 16.11 13.46
Kcal/hW 3.33 3.89 3.47 3.83 4.06 3.39
ErP
Pdesign kW 2.1 2.7
Tbivalent °C -10 -10
SCOP (W/W) 4.7 4.9
Annual
Consumption kWh 626 771
Class A++ A++
Power Factor % – 96 – – 95 –
Indoor Noise (H / L / QLo) dB-A 38 / 25 / 19 40 / 27 / 19
Power Level dB 54 / – 56 / –
Outdoor Noise (H / L) dB-A 46 / – 47 / –
Power Level dB 61 / – 62 / –
Low Temp. : Capacity (kW) / I.Power (W) / COP 2.90 / 870 / 3.33 3.62 / 1.12k / 3.23
Extr Low Temp. : Capacity (kW) / I.Power (W) / COP 2.38 / 880 / 2.70 2.95 / 1.15k / 2.57
Max Current (A) / Max Input Power (W) 4.40 / 990 5.6 / 1.27k
Starting Current (A) 2.80 3.30

11
Model Indoor CS-XZ7SKEW CS-XZ9SKEW
Outdoor CU-Z7SKE CU-Z9SKE
Compressor
Type Hermetic Motor (Rotary) Hermetic Motor (Rotary)
Motor Type Brushless (6 poles) Brushless (6 poles)
Output Power W 650 700
Indoor Fan
Type Cross-Flow Fan Cross-Flow Fan
Material ASG20K1 ASG20K1
Motor Type DC / Transistor (8-poles) DC / Transistor (8-poles)
Input Power W 44.9 44.9
Output Power W 40 40
Speed
QLo Cool rpm 610 600
Heat rpm 610 620
Lo Cool rpm 700 720
Heat rpm 800 860
Me Cool rpm 880 930
Heat rpm 970 1070
Hi Cool rpm 1060 1140
Heat rpm 1140 1280
SHi Cool rpm 1090 1170
Heat rpm 1170 1330
Outdoor Fan
Type Propeller Fan Propeller Fan
Material PP PP
Motor Type DC (8-poles) DC (8-poles)
Input Power W – –
Output Power W 40 40
Speed Hi Cool rpm 780 820
Heat rpm 720 780
Moisture Removal L/h (Pt/h) 1.3 (2.7) 1.5 (3.2)
Indoor
Airflow
QLo Cool m3/min (ft3/min) 5.05 (178) 4.85 (171)
Heat m3/min (ft3/min) 5.05 (178) 5.03 (178)
Lo Cool m3/min (ft3/min) 6.02 (213) 6.00 (212)
Heat m3/min (ft3/min) 7.12 (251) 7.31 (258)
Me Cool m3/min (ft3/min) 7.96 (281) 7.99 (282)
Heat m3/min (ft3/min) 8.97 (317) 9.30 (328)
Hi Cool m3/min (ft3/min) 9.90 (350) 10.00 (355)
Heat m3/min (ft3/min) 10.80 (380) 11.30 (400)
SHi Cool m3/min (ft3/min) 10.22 (361) 10.28 (363)
Heat m3/min (ft3/min) 11.13 (393) 11.77 (416)
Outdoor
Airflow Hi Cool m3/min (ft3/min) 26.9 (950) 28.7 (1015)
Heat m3/min (ft3/min) 26.9 (950) 28.7 (1015)
Refrigeration
Cycle
Control Device Expansion Valve Expansion Valve
Refrigerant Oil cm3FW50S (320) FW50S (320)
Refrigerant Type g (oz) R32, 760 (26.8) R32, 850 (30.0)
F-Gas
GWP 675 675
CO2eq (ton)
(Precharged Amount /
Maximum Charged Amount)
0.513 / 0.564 0.574 / 0.624
Dimension
Height (I/D / O/D) mm (inch) 295 (11-5/8) / 542 (21-11/32) 295 (11-5/8) / 542 (21-11/32)
Width (I/D / O/D) mm (inch) 919 (36-3/16) / 780 (30-23/32) 919 (36-3/16) / 780 (30-23/32)
Depth (I/D / O/D) mm (inch) 194 (7-21/32) / 289 (11-13/32) 194 (7-21/32) / 289 (11-13/32)
Weight Net (I/D / O/D) kg (lb) 9 (20) / 30 (66) 10 (22) / 33 (73)

12
Model Indoor CS-XZ7SKEW CS-XZ9SKEW
Outdoor CU-Z7SKE CU-Z9SKE
Piping
Pipe Diameter (Liquid / Gas) mm (inch) 6.35 (1/4) / 9.52 (3/8) 6.35 (1/4) / 9.52 (3/8)
Standard length m (ft) 5.0 (16.4) 5.0 (16.4)
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) 15.0 (49.2) 15.0 (49.2)
Additional Gas Amount g/m (oz/ft) 10 (0.1) 10 (0.1)
Length for Additional Gas m (ft) 7.5 (24.6) 7.5 (24.6)
Drain Hose Inner Diameter mm 16.7 16.7
Length mm 650 650
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) mm 610 × 315 × 25.4 610 × 315 × 25.4
Outdoor
Heat
Exchanger
Fin Material Aluminium Aluminium
Fin Type Corrugated Fin Corrugated Fin
Row × Stage × FPI 2 × 24 × 17 2 × 24 × 19
Size (W × H × L) mm 36.4 × 504 × 713:684 36.4 × 504 × 824.2:793.7
Air Filter Material Polypropelene Polypropelene
Type One-touch One-touch
Power Supply Indoor Indoor
Power Supply Cord A Nil Nil
Thermostat Electronic Contol Electronic Contol
Protection Device Electronic Contol Electronic Contol
Dry Bulb Wet Bulb Dry Bulb Wet Bulb
Indoor
Operation
Range
Cooling Maximum °C 32 23 32 23
Minimum °C 16 11 16 11
Heating Maximum °C 30 – 30 –
Minimum °C 16 – 16 –
Outdoor
Operation
Range
Cooling Maximum °C 43 26 43 26
Minimum °C -10 – -10 –
Heating Maximum °C 24 18 24 18
Minimum °C -15 -16 -15 -16
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. Heating low temperature capacity, Input Power and COP measured at 230 V, indoor temperature 20°C, outdoor 2/1°C
4. Heating extreme low temperature capacity, Input Power and COP measured at 230 V, indoor temperature 20°C, outdoor -7/-8°C
5. Standby power consumption ≤10.0w (when switched OFF by remote control, except under self protection control).
6. Specifications are subjected to change without prior notice for further improvement.

13
Model Indoor CS-XZ12SKEW CS-XZ18SKEW
Outdoor CU-Z12SKE CU-Z18SKE
Performance Test Condition EUROVENT EUROVENT
Power Supply
Phase, Hz Single, 50 Single, 50
V 230 230
Min. Mid. Max. Min. Mid. Max.
Cooling
Capacity
kW 0.85 3.50 4.00 0.98 5.00 5.60
BTU/h 2900 11900 13600 3340 17100 19100
Kcal/h 730 3010 3440 840 4300 4820
Running Current A – 3.95 – – 6.70 –
Input Power W 240 840 1.06k 280 1.50k 1.72k
Annual Consumption kWh – 420 – – 750 –
EER
W/W 3.54 4.17 3.77 3.50 3.33 3.26
BTU/hW 12.08 14.17 12.83 11.93 11.40 11.10
Kcal/hW 3.04 3.58 3.25 3.00 2.87 2.80
ErP
Pdesign kW 3.5 5.0
SEER (W/W) 8.5 7.3
Annual
Consumption kWh 144 240
Class A+++ A++
Power Factor % – 92 – – 97 –
Indoor Noise (H / L / QLo)
dB-A 42 / 28 / 19 44 / 37 / 34
Power Level dB 58 / – 60 / –
Outdoor Noise (H / L)
dB-A 48 / – 47 / –
Power Level dB 63 / – 61 / –
Heating
Capacity
kW 0.80 4.00 5.80 0.98 5.80 7.50
BTU/h 2730 13600 19800 3340 19800 25600
Kcal/h 690 3440 4990 840 4990 6450
Running Current A – 4.40 – – 7.60 –
Input Power W 180 920 1.52k 340 1.70k 2.35k
COP
W/W 4.44 4.35 3.82 2.88 3.41 3.19
BTU/hW 15.17 14.78 13.03 9.82 11.65 10.89
Kcal/hW 3.83 3.74 3.28 2.47 2.94 2.74
ErP
Pdesign kW 3.2 4.2
Tbivalent °C -10 -10
SCOP (W/W) 4.9 4.4
Annual
Consumption kWh 914 1336
Class A++ A+
Power Factor % – 91 – – 97 –
Indoor Noise (H / L / QLo) dB-A 42 / 33 / 19 44 / 37 / 34
Power Level dB 58 / – 60 / –
Outdoor Noise (H / L) dB-A 50 / – 47 / –
Power Level dB 65 / – 61 / –
Low Temp. : Capacity (kW) / I.Power (W) / COP 4.20 / 1.35k / 3.11 5.43 / 2.08k / 2.61
Extr Low Temp. : Capacity (kW) / I.Power (W) / COP 3.40 / 1.40k / 2.43 4.66 / 2.19k / 2.13
Max Current (A) / Max Input Power (W) 7.8 / 1.52k 10.4 / 2.35k
Starting Current (A) 4.40 7.60

14
Model Indoor CS-XZ12SKEW CS-XZ18SKEW
Outdoor CU-Z12SKE CU-Z18SKE
Compressor
Type Hermetic Motor (Rotary) Hermetic Motor (Rotary)
Motor Type Brushless (6 poles) Brushless (4 poles)
Output Power W 700 900
Indoor Fan
Type Cross-Flow Fan Cross-Flow Fan
Material ASG20K1 ASG20K1
Motor Type DC / Transistor (8-poles) DC / Transistor (8-poles)
Input Power W 44.9 44.9
Output Power W 40 40
Speed
QLo Cool rpm 600 950
Heat rpm 620 1030
Lo Cool rpm 800 1040
Heat rpm 1020 1140
Me Cool rpm 1010 1180
Heat rpm 1180 1270
Hi Cool rpm 1220 1320
Heat rpm 1350 1400
SHi Cool rpm 1270 1370
Heat rpm 1400 1430
Outdoor Fan
Type Propeller Fan Propeller Fan
Material PP PP
Motor Type DC (8-poles) DC (8-poles)
Input Power W – –
Output Power W 40 40
Speed Hi Cool rpm 870 640
Heat rpm 890 600
Moisture Removal L/h (Pt/h) 2.0 (4.2) 2.8 (5.9)
Indoor
Airflow
QLo Cool m3/min (ft3/min) 4.83 (171) 8.17 (288)
Heat m3/min (ft3/min) 5.05 (178) 8.89 (314)
Lo Cool m3/min (ft3/min) 6.72 (237) 9.04 (319)
Heat m3/min (ft3/min) 8.86 (313) 9.94 (351)
Me Cool m3/min (ft3/min) 8.71 (308) 10.37 (366)
Heat m3/min (ft3/min) 10.42 (368) 11.16 (394)
Hi Cool m3/min (ft3/min) 10.70 (380) 11.70 (415)
Heat m3/min (ft3/min) 12.00 (425) 12.40 (440)
SHi Cool m3/min (ft3/min) 11.17 (394) 12.17 (430)
Heat m3/min (ft3/min) 12.48 (441) 12.72 (449)
Outdoor
Airflow Hi Cool m3/min (ft3/min) 34.4 (1215) 39.2 (1385)
Heat m3/min (ft3/min) 35.6 (1255) 37.9 (1340)
Refrigeration
Cycle
Control Device Expansion Valve Expansion Valve
Refrigerant Oil cm3FW50S (320) FW50S (450)
Refrigerant Type g (oz) R32, 910 (32.1) R32, 1.03k (36.4)
F-Gas
GWP 675 675
CO2eq (ton)
(Precharged Amount /
Maximum Charged Amount)
0.614 / 0.665 0.695 / 0.822
Dimension
Height (I/D / O/D) mm (inch) 295 (11-5/8) / 619 (24-3/8) 295 (11-5/8) / 695 (27-3/8)
Width (I/D / O/D) mm (inch) 919 (36-3/16) / 824 (32-15/32) 919 (36-3/16) / 875 (34-15/32)
Depth (I/D / O/D) mm (inch) 194 (7-21/32) / 299 (11-25/32) 194 (7-21/32) / 320 (12-5/8)
Weight Net (I/D / O/D) kg (lb) 10 (22) / 35 (77) 10 (22) / 46 (101)

15
Model Indoor CS-XZ12SKEW CS-XZ18SKEW
Outdoor CU-Z12SKE CU-Z18SKE
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) 5.0 (16.4) 5.0 (16.4)
Length range (min – max) m (ft) 3 (9.8) ~ 15 (49.2) 3 (9.8) ~ 20 (65.6)
I/D & O/D Height different m (ft) 15.0 (49.2) 15.0 (49.2)
Additional Gas Amount g/m (oz/ft) 10 (0.1) 15 (0.2)
Length for Additional Gas m (ft) 7.5 (24.6) 7.5 (24.6)
Drain Hose Inner Diameter mm 16.7 16.7
Length mm 650 650
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) mm 610 × 315 × 25.4 610 × 315 × 25.4
Outdoor
Heat
Exchanger
Fin Material Aluminium Aluminium
Fin Type Corrugated Fin Corrugated Fin (Pre Coat)
Row × Stage × FPI 2 × 28 × 17 2 × 31 × 19
Size (W × H × L) mm 36.38 × 588 × 856.3:827.7 36.4 × 651 × 854.5:824.5
Air Filter Material Polypropelene Polypropelene
Type One-touch One-touch
Power Supply Indoor Indoor
Power Supply Cord A Nil Nil
Thermostat Electronic Contol Electronic Contol
Protection Device Electronic Contol Electronic Contol
Dry Bulb Wet Bulb Dry Bulb Wet Bulb
Indoor
Operation
Range
Cooling Maximum °C 32 23 32 23
Minimum °C 16 11 16 11
Heating Maximum °C 30 – 30 –
Minimum °C 16 – 16 –
Outdoor
Operation
Range
Cooling Maximum °C 43 26 43 26
Minimum °C -10 – -10 –
Heating Maximum °C 24 18 24 18
Minimum °C -15 -16 -15 -16
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. Heating low temperature capacity, Input Power and COP measured at 230 V, indoor temperature 20°C, outdoor 2/1°C
4. Heating extreme low temperature capacity, Input Power and COP measured at 230 V, indoor temperature 20°C, outdoor -7/-8°C
5. Standby power consumption ≤10.0w (when switched OFF by remote control, except under self protection control).
6. Specifications are subjected to change without prior notice for further improvement.

16
Multi Split Combination Possibility:
oA single outdoor unit enables air conditioning of up to two separate rooms for CU-2E12SBE, CU-2E15SBE,
CU-2E18SBE.
oA single outdoor unit enables air conditioning of up to three separate rooms for CU-3E23SBE.
CONNECTABLE INDOOR UNIT CU-2E12SBE CU-2E15SBE CU-2E18SBE CU-3E23SBE
ROOM A B A B A B A B C
Wall
1.6kW CS-MZ5SKE
CS-MZ5SKE-M ●●●●●●●●●
2.0kW
CS-Z7SKEW
CS-E7SKEW
CS-XE7SKEW
CS-Z7SKEW-M
CS-XZ7SKEW
CS-E7SKEW-M
●●●●●●●●●
2.5kW
CS-Z9SKEW
CS-E9SKEW
CS-XE9SKEW
CS-XZ9SKEW
CS-Z9SKEW-M
CS-E9SKEW-M
●●●●●●●●●
3.2kW
CS-Z12SKEW
CS-E12SKEW
CS-XE12SKEW
CS-XZ12SKEW
CS-Z12SKEW-M
CS-E12SKEW-M
– – – – ●●●●●
4.0kW
CS-Z15SKEW
CS-E15SKEW
CS-Z15SKEW-M
CS-E15SKEW-M
– – – – – – – ●●
5.0kW
CS-Z18SKEW
CS-E18SKEW
CS-XE18SKEW
CS-XZ18SKEW
CS-Z18SKEW-M
CS-E18SKEW-M
– – – – – – – ●●
Capacity range of connectable units From 3.2kW to 5.6kW From 3.2kW to 5.6kW From 3.2kW to 7.5kW From 4.8kW to 10.0kW
Pipe length
1 room maximum pipe length (m) 20 20 20 25
Allowable elevation (m) 10 10 10 15
Total allowable pipe length (m) 30 30 30 60
Total pipe length for maximum
chargeless length (m) 20 20 20 30
Additional gas amount over
chargeless length (g/m) 15 15 15 20
Note: “●” : Available
Remarks for CU-2E12SBE / CU-2E15SBE / CU-2E18SBE
1. At least two indoor units must be connected.
2. The total nominal cooling capacity of indoor unit that will be connected to outdoor unit must be within connectable capacity range of indoor
unit. (as shown in the table above)
Example: The indoor units’ combination below is possible to connect to CU-2E15SBE. (Total nominal capacity of indoor units is between
3.2kW to 5.6kW)
1) Two CS-XZ7SKEW only. (Total nominal cooling capacity is 4.0kW)
2) One CS-XZ7SKEW and one CS-XZ9SKEW. (Total nominal cooling capacity is 4.5kW)
Remarks for CU-3E23SBE
1. At least two indoor units must be connected.
2. The total nominal cooling capacity of indoor unit that will be connected to outdoor unit must be within connectable capacity range of indoor
unit. (as shown in the table above)
Example: The indoor units’ combination below is possible to connect to CU-3E23SBE. (Total nominal capacity of indoor units is between
4.8kW to 10.0kW)
1) Two CS-XZ9SKEW only. (Total nominal cooling capacity is 5.0kW)
2) Three CS-XZ12SKEW. (Total nominal cooling capacity is 9.6kW)

17
Multi Split Combination Possibility:
oA single outdoor unit enables air conditioning of up to four separate rooms for CU-4E23PBE, CU-4E27PBE.
oA single outdoor unit enables air conditioning of up to five separate rooms for CU-5E34PBE.
CONNECTABLE INDOOR UNIT CU-4E23PBE CU-4E27PBE CU-5E34PBE
ROOM A B C D A B C D A B C D E
Wall
1.6kW CS-MZ5SKE
CS-MZ5SKE-M ●●●●●●●●●●●●●
2.0kW
CS-Z7SKEW
CS-E7SKEW
CS-XE7SKEW
CS-Z7SKEW-M
CS-XZ7SKEW
CS-E7SKEW-M
●●●●●●●●●●●●●
2.5kW
CS-Z9SKEW
CS-E9SKEW
CS-XE9SKEW
CS-XZ9SKEW
CS-Z9SKEW-M
CS-E9SKEW-M
●●●●●●●●●●●●●
3.2kW
CS-Z12SKEW
CS-E12SKEW
CS-XE12SKEW
CS-XZ12SKEW
CS-Z12SKEW-M
CS-E12SKEW-M
– ●●●●●●●●●●●●
4.0kW
CS-Z15SKEW
CS-E15SKEW
CS-Z15SKEW-M
CS-E15SKEW-M
– – ●●– ●●●– ●●●●
5.0kW
CS-Z18SKEW
CS-E18SKEW
CS-XE18SKEW
CS-XZ18SKEW
CS-Z18SKEW-M
CS-E18SKEW-M
– – ●●–
–●●– –●●●
Capacity range of connectable units From 4.8kW to 11.0kW From 4.8kW to 13.6kW From 4.8kW to 17.5kW
Pipe length
1 room maximum pipe length (m) 25 25 25
Allowable elevation (m) 15 15 15
Total allowable pipe length (m) 70 70 80
Total pipe length for maximum
chargeless length (m) 40 45 45
Additional gas amount over
chargeless length (g/m) 20 20 20
Note: “●” : Available
Remarks for CU-4E23PBE / CU-4E27PBE / CU-5E34PBE
1. At least two indoor units must be connected.
2. The total nominal cooling capacity of indoor unit that will be connected to outdoor unit must be within connectable capacity range of indoor
unit. (as shown in the table above)
Example: The indoor units’ combination below is possible to connect to CU-4E27PBE. (Total nominal capacity of indoor units is between
4.5kW to 13.6kW)
1) Two CS-XZ9SKEW only. (Total nominal cooling capacity is 5.0kW)
2) Three CS-XZ12SKEW. (Total nominal cooling capacity is 9.6kW)

18
4. Features
Inverter Technology
oWider output power range
oEnergy saving
oQuick Cooling
oQuick Heating
oMore precise temperature control
Environment Protection
oNon-ozone depletion substances refrigerant (R32)
Long Installation Piping
oLong piping up to 15 meters (0.75 ~ 2.0HP) and 20 meters (2.25HP) during single split connection only
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 Feature
oActivation and Deactivation Method for Heating Only Mode
oBreakdown Self Diagnosis function

19
5. Location of Controls and Components
5.1 Indoor Unit
Front panel
Air Filters
Auto OFF/ON button
Use when remote control is misplaced
or a malfunction occurs.
Vertical airflow direction louver
Do not adjust by hand.
Horizontal airflow direction louver
Do not adjust by hand.
Aluminium fin
Human activity
sensor
Sunlight Sensor and
Remote Control Receiver
Indicator
TIMER
ECONAVI
nanoe
POWER
(White)
(White)
(White)
(White)
5.2 Outdoor Unit
5.3 Remote Control
Timer setting
Airflow direction
selection
Mild dry operation
nanoe operation
Fan speed selection
Transmitter
Operation mode
Sleep mode operation
Powerful/Quiet
operation
ECONAVI operation
Remote control
display
Clock setting
OFF/ON
Check
Temperature setting

20
6. Dimensions
6.1 Indoor Unit
(194)
919
295
2 ±0.5 2 ±0.5
194
45 61
6060 139149
(41-61)410
16.4
264.6
Unit: mm
B
A
C
PIPE
HOLE
CENTER
PIPE
HOLE
CENTER
128mm TO
PIPE HOLE
CENTER
128mm TO
PIPE HOLE
CENTER
496.6
128
266 266
128
Right
piping
hole
Left
piping
hole
Installation
plate
Indoor unit
external
dimensions
line
460460
43
95
<Top View>
<Front View>
<Bottom View>
<Rear View>
Relative position between the indoor unit and the installation plate <Front View>
<Side View> <Side View>
Gas side
Liquid side
Left piping
hole Air outlet
direction
Air intake
direction
Left piping
hole
62
51
22
<Remote Control Holder>
<Remote Control>
134
47