Panasonic CS-MZ16VKE User manual

© Panasonic Corporation 2019.
Order No: PAPAMY1902036CE
Indoor Unit
CS-MZ16VKE
Destination
Europe
Turkey
Please file and use this manual together with the service manual for Model No. CU-2E12SBE, CU-2E15SBE, CU-2E18SBE,
CU-3E18PBE, CU-3E23SBE, CU-4E23PBE, CU-4E27PBE, CU-5E34PBE, CU-2Z35TBE, CU-2Z41TBE, CU-2Z50TBE,
CU-3Z52TBE, CU-3Z68TBE, CU-4Z68TBE, CU-4Z80TBE, CU-5Z90TBE, Order No. PAPAMY1601015CE, PAPAMY1301048CE,
PAPAMY1303046CE, PAPAMY1702035CE, PAPAMY1703049CE, PAPAMY1710082CE.
WARNING
This service information is designed for experienced repair technicians only and is not designed for use by the general public.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service
or repair the products dealt with in this service information by anyone else could result in serious injury or death.
PRECAUTION OF LOW TEMPERATURE
In order to avoid frostbite, be assured of no refrigerant leakage during the installation or repairing of refrigerant circuit.
CAUTION
R32 REFRIGERANT – This Air Conditioner contains and operates with refrigerant R32.
THIS PRODUCT MUST ONLY BE INSTALLED OR SERVICED BY QUALIFIED PERSONNEL.
Refer to Commonwealth, State, Territory and local legislation, regulations, codes, installation & operation manuals, before the
installation, maintenance and/or service of this product.
IMPORTANT SAFETY NOTICE
There are special components used in this equipment which are important for safety. These parts are marked by in the Schematic
Diagrams, Circuit Board Diagrams, Exploded Views and Replacement Parts List. It is essential that these critical parts should be replaced
with manufacturer’s specified parts to prevent shock, fire or other hazards. Do not modify the original design without permission of
manufacturer.

2
Specifications, designs and contents in this Service Manual are subject to change without notice.
TABLE OF CONTENTS
PAGE PAGE
1. Safety Precautions .............................................3
2. Precaution for Using R32 Refrigerant ..............6
3. Specifications ...................................................11
4. Features.............................................................17
5. Location of Controls and Components..........18
5.1 Indoor Unit ..................................................18
5.2 Remote Control ..........................................18
6. Dimensions .......................................................19
7. Refrigeration Cycle Diagram ...........................20
8. Block Diagram ..................................................21
9. Wiring Connection Diagram ............................22
10. Electronic Circuit Diagram ..............................23
11. Printed Circuit Board .......................................24
11.1 Indoor Unit ..................................................24
12. Installation Instruction.....................................27
12.1 Select the Best Location.............................27
12.2 Indoor Unit ..................................................28
13. Installation and Servicing Air Conditioner
using R32 ..........................................................35
13.1 About R32 Refrigerant................................35
13.2 Characteristics of R32 Refrigerant .............35
13.3 Refrigerant piping installation • Tools used
in services...................................................37
13.4 New installation, Relocation,
Repairing of Refrigerant Cycle System
The Procedures ..........................................41
13.5 Piping installation of R32............................42
13.6 Installation, Relocation, and Service ..........43
13.7 Repairing of refrigerant cycle /
Brazing point...............................................47
13.8 <Reference> Analysis method for no error
code, no cooling / no warming....................53
14. Operation Control.............................................55
14.1 Basic Function ............................................55
14.2 Indoor Fan Motor Operation .......................56
14.3 Airflow Direction..........................................57
14.4 Quiet Operation (Cooling Mode/Cooling
Area of Dry Mode) ......................................60
14.5 Quiet Operation (Heating) ..........................60
14.6 Powerful Mode Operation...........................60
14.7 Timer Control..............................................61
14.8 Sleep Mode Operation ...............................61
14.9 Auto Restart Control...................................62
14.10 Indication Panel..........................................63
14.11 nanoeTM X Operation ..................................63
14.12 Mild Dry Cooling Operation ........................65
14.13 Wireless LAN Control .................................65
15. Operation Control
(For Multi Split Connection) ............................68
15.1 Cooling operation .......................................68
15.2 Soft Dry Operation......................................68
15.3 Heating Operation ......................................68
15.4 Automatic Operation...................................69
15.5 Indoor Fan Motor Operation .......................69
15.6 Powerful Mode Operation...........................69
15.7 Auto Restart Control ...................................69
15.8 Indication Panel ..........................................69
15.9 Mild Dry Cooling Operation ........................69
16. Servicing Mode .................................................70
16.1 Auto OFF/ON Button ..................................70
16.2 Heat Only Operation...................................71
16.3 Remote Control Button...............................72
17. Troubleshooting Guide....................................78
17.1 Refrigeration Cycle System........................78
17.2 Breakdown Self Diagnosis Function...........80
17.3 Error Codes Table ......................................81
17.4 Self-diagnosis Method................................83
18. Disassembly and Assembly Instructions ... 111
18.1 Indoor Electronic Controllers,
Cross Flow Fan and Indoor Fan Motor
Removal Procedures ............................... 111
18.2 ‘Panasonic Comfort Cloud’ App Setting
Procedure [After Replace Main Printed
Circuit Board or Change the Indoor
Unit] ......................................................... 119
19. Exploded View and Replacement Parts
List .................................................................. 131
19.1 Indoor Unit ............................................... 131

3
1. Safety Precautions
Read the following “SAFETY PRECAUTIONS” carefully before perform any servicing.
Confirm the type of gas used before installation.
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 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 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 only.
The items to be followed are classified by the symbols:
Explanation of symbols displayed on the indoor unit or outdoor unit.
WARNING This symbol shows that this equipment uses a flammable refrigerant.
If the refrigerant is leaked, together with an external ignition source, there is a possibility of ignition.
CAUTION This symbol shows type of flammable refrigerant contained in the system.
CAUTION This symbol shows that the Installation Manual should be read carefully.
CAUTION This symbol shows that a service personnel should be handling this equipment with reference to the
Installation Manual.
CAUTION This symbol shows that there is information included in the Operation Manual and/or Installation Manual.
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 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. Do not tie up the power supply cord into a bundle by band. Abnormal temperature rise on power supply cord may happen.
5. Do not insert your fingers or other objects into the unit, high speed rotating fan may cause injury.
6. Do not sit or step on the unit, you may fall down accidentally.
7. Keep plastic bag (packaging material) away from small children, it may cling to nose and mouth and prevent breathing.
8.
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.
9.
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.
10. Do not add or replace refrigerant other than specified type. It may cause product damage, burst and injury etc.
Symbol with white background denotes item that is PROHIBITED.
Symbol with dark background denotes item that must be carried out.

4
WARNING
11.
For R410A/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 or 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.
12. Engage authorized dealer or specialist for installation and servicing. If installation or servicing done by the user is defective, it will cause
water leakage, electrical shock or fire.
13. For refrigeration system work, Install according to this installation instructions strictly. If installation is defective, it will cause water
leakage, electrical shock or fire.
14. 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.
15. 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.
16. For electrical work, follow the national regulation, legistration 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.
17.
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.
18. 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 connection point of terminal, fire or electrical shock.
19.
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.
20.
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.
21.
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.
22. 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.
23. 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.
24. Ventilate if there is refrigerant gas leakage during operation. It may cause toxic gas when the refrigerant contacts with fire.
25. Be aware that refrigerants may not contain an odour.
26. 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.
27.
When connecting flare at indoor side, make sure that the flare connection is used only once, if torqued up and released, the flare must
be remade.
Once the flare connection was torqued up correctly and leak test was made, thoroughly clean and dry the surface to remove oil, dirt and
grease by following instructions of silicone sealant. Apply neutral cure (Alkoxy type) & ammonia-free silicone sealant that is non-
corrosive to copper & brass to the external of the flared connection to prevent the ingress of moisture on both the gas & liquid sides.
(Moisture may cause freezing and premature failure of the connection)
28.
The appliance shall be stored, installed and operated in a well ventilated room with indoor floor area larger than Amin (m2) [refer Table A]
and without any continuously operating ignition sources.
Keep away from open flames, any operating gas appliances or any operating electric heater. Else, it may explode and cause injury or
death.
29. Do not modify the machine, part, material during repairing service.
30. 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.
31. Do not wrench the fasten terminal. Pull it out or insert it straightly.
32. Must not use other parts except original parts describe in catalog and manual.
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, servicing, reinstallation and during repairing a refrigerant 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
CAUTION
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. Installation or servicing work: It may need two people to carry out the installation or servicing work.
9. Keep any required ventilation openings clear of obstruction.
10.
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).
11.
Do not touch the sharp aluminum 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.
12. 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.
13. Do not touch outdoor unit air inlet and aluminium fin. It may cause injury.

6
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:
WARNING
1.
The appliance shall be stored, installed and operated 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.
2.
Since the working pressure is higher than that of refrigerant R22 models, some of the piping and installation and service tools are
special.
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.
3.
The mixing of different refrigerants within a system is prohibited. 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).]
4. Ensure 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.)
5.
Operation, maintenance, repairing and refrigerant recovery should be carried out by trained and certified personnel in the use of
flammable refrigerants and as recommended by the manufacturer.
Any personnel conducting an operation, servicing or maintenance on a system or associated parts of the equipment should be trained
and certified.
6. Any part of refrigerating circuit (evaporators, air coolers, AHU, condensers or liquid receivers) or piping should not be located in the
proximity of heat sources, open flames, operating gas appliance or an operating electric heater.
7. The user/owner or their authorized representative shall regularly check the alarms, mechanical ventilation and detectors, at least once a
year, where as required by national regulations, to ensure their correct functioning.
8. A logbook shall be maintained. The results of these checks shall be recorded in the logbook.
9. In case of ventilations in occupied spaces shall be checked to confirm no obstruction.
10.
Before a new refrigerating system is put into service, the person responsible for placing the system in operation should ensure that
trained and certified operating personnel are instructed on the basis of the instruction manual about the construction, supervision,
operation and maintenance of the refrigerating system, as well as the safety measures to be observed, and the properties and handling
of the refrigerant used.
11.
The general requirement of trained and certified personnel are indicated as below:
a) Knowledge of legislation, regulations and standards relating to flammable refrigerants; and,
b) Detailed knowledge of and skills in handling flammable refrigerants, personal protective equipment, refrigerant leakage prevention,
handling of cylinders, charging, leak detection, recovery and disposal; and,
c) Able to understand and to apply in practice the requirements in the national legislation, regulations and Standards; and,
d) Continuously undergo regular and further training to maintain this expertise.
12. Air-conditioner piping in the occupied space shall be installed in such a way to protect against accidental damage in operation and
service.
13. Precautions shall be taken to avoid excessive vibration or pulsation to refrigerating piping.
14. Ensure protection devices, refrigerating piping and fittings are well protected against adverse environmental effects (such as the danger
of water collecting and freezing in relief pipes or the accumulation of dirt and debris).
15. Expansion and contraction of long runs piping in refrigerating systems shall be designed and installed securely (mounted and guarded)
to minimize the likelihood hydraulic shock damaging the system.
16. Protect the refrigerating system from accidental rupture due to moving furniture or reconstruction activities.
17.
To ensure no leaking, field-made refrigerant joints indoors shall be tightness tested. The test method shall have a sensitivity of 5 grams
per year of refrigerant or better under a pressure of at least 0,25 times the maximum allowable pressure (>1.04MPa, max 4.15MPa). No
leak shall be detected.

7
CAUTION
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.
In case of field charge, the effect on refrigerant charge caused by the different pipe length has to be quantified, measured and
labeled.
Always contact to local municipal offices for proper handling.
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 recognised 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.
The system is inspected, regularly supervised and maintained by a trained and certified service personnel who is employed by the
person user or party responsible.
Ensure the actual refrigerant charge size is in accordance with the room size within which the refrigerant containing parts are
installed.
Ensure refrigerant charge not to leak.
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 vapor 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.

8
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.

9
CAUTION
7.
The following leak detection methods are deemed acceptable for all refrigerant systems.
No leaks shall be detected when using detection equipment with a capability of 10-6 Pa•m3/s or better, for example, a helium sniffer.
Electronic leak detectors may 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.

10
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.

11
3. Specifications
Model Indoor CS-MZ16VKE
Outdoor CU-3E23SBE
Performance Test Condition EUROVENT
Power Supply Phase, Hz Single, 50
V 230
Min. Mid. Max.
Cooling
Capacity kW 1.30 1.60 2.30
BTU/h 4430 5460 7840
Running Current A – 2.00 –
Input Power W 250 400 640
Annual Consumption kWh – 200 –
EER W/W 5.20 4.00 3.59
Indoor Noise (H / L / QLo) dB-A 38 / 26 / 21
Power Level dB 54 / - / -
Heating
Capacity kW 1.20 2.60 3.20
BTU/h 4090 8870 10900
Running Current A – 3.00 –
Input Power W 300 600 960
Annual Consumption kWh – 300 –
COP W/W 4.00 4.33 3.33
Indoor Noise (H / L / QLo) dB-A 39 / 27 / 21
Power Level dB 55 / - / -
Indoor Fan
Type Cross-Flow Fan
Material ASG20K1
Motor Type DC / Transistor (8-poles)
Input Power W 44.9
Output Power W 40
Speed
QLo Cool rpm 610
Heat rpm 610
Lo Cool rpm 700
Heat rpm 780
Me Cool rpm 860
Heat rpm 940
Hi Cool rpm 1030
Heat rpm 1110
SHi Cool rpm 1060
Heat rpm 1270
Moisture Removal L/h (Pt/h) 1.0
Indoor
Airflow
QLo Cool m3/min (ft3/min) 5.06 (178)
Heat m3/min (ft3/min) 5.06 (178)
Lo Cool m3/min (ft3/min) 6.02 (213)
Heat m3/min (ft3/min) 6.87 (243)
Me Cool m3/min (ft3/min) 7.72 (273)
Heat m3/min (ft3/min) 8.57 (303)
Hi Cool m3/min (ft3/min) 9.6 (340)
Heat m3/min (ft3/min) 10.5 (370)
SHi Cool m3/min (ft3/min) 9.85 (348)
Heat m3/min (ft3/min) 12.08 (427)

12
Model
Indoor CS-MZ16VKE
Outdoor CU-3E23SBE
Dimension
Height (I/D) mm (inch) 295 (11-5/8)
Width (I/D) mm (inch) 919 (36-3/16)
Depth (I/D) mm (inch) 194 (7-21/32)
Weight Net (I/D) kg (lb) 9 (20)
Piping Pipe Diameter
(Liquid / Gas) mm (inch) 6.35 (1/4) / 9.52 (3/8)
Drain Hose Inner Diameter mm 16.7
Length mm 650
Indoor Heat
Exchanger
Fin Material Aluminium (Pre Coat)
Fin Type Slit Fin
Row × Stage × FPI 2 × 15 × 21
Size (W × H × L) mm 610 × 315 × 25.4
Air Filter Material Polypropelene
Type One-touch
Dry Bulb Wet Bulb
Indoor
Operation
Range
Cooling Maximum °C 32 23
Minimum °C 16 11
Heating Maximum °C 30 –
Minimum °C 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 ≤12.0w (when switched OFF by remote control, except under self protection control).
6. Specifications are subjected to change without prior notice for further improvement.

13
Multi Split Combination Possibility:
oA single outdoor unit enables air conditioning of up to two separate rooms for CU-2Z35TBE,
CU-2Z41TBE, CU-2Z50TBE.
oA single outdoor unit enables air conditioning of up to three separate rooms for CU-3Z68TBE, CU-3Z52TBE.
CONNECTABLE INDOOR UNIT OUTDOOR UNIT
CU-2Z35TBE CU-2Z41TBE CU-2Z50TBE CU-3Z68TBE CU-3Z52TBE
ROOM
TYPE
A B A B A B A B C A B C
Wall
1.6kW CS-MZ16VKE
CS-MRZ16VKE ●●●●●●●●●●●●
2.0kW
CS-Z20VKEW
CS-XZ20VKEW
CS-RZ20VKEW
●●●●●●●●●●●●
2.5kW
CS-Z25VKEW
CS-XZ25VKEW
CS-RZ25VKEW
●●●●●●●●●●●●
3.5kW
CS-Z35VKEW
CS-XZ35VKEW
CS-RZ35VKEW
●– ●– ●●●●●●●–
4.2kW CS-Z42VKEW
CS-RZ42VKEW – – – – ●– ●●– ●●–
5.0kW
CS-Z50VKEW
CS-XZ50VKEW
CS-RZ50VKEW
– – – – ●– ●●– ●– –
6.0kW CS-RZ60VKEW – – – – – – ●– – – – –
Capacity range of
connectable units
From 3.2kW to
6.0kW
From 3.2kW to
6.0kW
From 3.2kW to
7.7kW From 4.5kW to 11.2kW From 4.5kW to 9.5kW
Pipe length
1 room maximum pipe length (m) 20 20 20 25 25
Allowable elevation (m) 10 10 10 15 15
Total allowable pipe length (m) 30 30 30 60 50
Total pipe length for maximum
chargeless length (m) 20 20 20 30 30
Additional gas amount over
chargeless length (g/m) 15 15 15 20 20
Note: “●” : Available
Remarks for CU-2Z35TBE / CU-2Z41TBE / CU-2Z50TBE
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-2Z41TBE. (Total nominal capacity of indoor units is between
3.2kW to 6.0kW)
1) Two CS-XZ20VKEW only. (Total nominal cooling capacity is 4.0kW)
Remarks for CU-3Z68TBE / CU-3Z52TBE
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-3Z68TBE. (Total nominal capacity of indoor units is between
4.5kW to 11.2kW)
1) Two CS-XZ25VKEW only. (Total nominal cooling capacity is 5.0kW)

14
Multi Split Combination Possibility:
oA single outdoor unit enables air conditioning of up to four separate rooms for CU-4Z68TBE, CU-4Z80TBE.
oA single outdoor unit enables air conditioning of up to five separate rooms for CU-5Z90TBE.
CONNECTABLE INDOOR UNIT OUTDOOR UNIT
CU-4Z68TBE CU-4Z80TBE CU-5Z90TBE
ROOM
TYPE
A B C D A B C D A B C D E
Wall
1.6kW CS-MZ16VKE
CS-MRZ16VKE ●●●●●●●●●●●●●
2.0kW
CS-Z20VKEW
CS-XZ20VKEW
CS-RZ20VKEW
●●●●●●●●●●●●●
2.5kW
CS-Z25VKEW
CS-XZ25VKEW
CS-RZ25VKEW
●●●●●●●●●●●●●
3.5kW
CS-Z35VKEW
CS-XZ35VKEW
CS-RZ35VKEW
●●●– ●●●●●●●●●
4.2kW CS-Z42VKEW
CS-RZ42VKEW ●●– – ●●●– ●●●●–
5.0kW
CS-Z50VKEW
CS-XZ50VKEW
CS-RZ50VKEW
●●– – ●●– – ●●●– –
6.0kW CS-RZ60VKEW ●– – – ●●– – ●●●– –
7.1kW CS-Z71VKEW
CS-RZ71VKEW – – – – ●●– – ●●– – –
Capacity range of
connectable units From 4.5kW to 11.5kW From 4.5kW to 14.7kW From 4.5kW to 18.3kW
Pipe length
1 room maximum pipe length (m) 25 25 25
Allowable elevation (m) 15 15 15
Total allowable pipe length (m) 60 70 80
Total pipe length for maximum
chargeless length (m) 30 45 45
Additional gas amount over
chargeless length (g/m) 20 20 20
Note: “●” : Available
Remarks for CU-4Z68TBE / CU-4Z80TBE / CU-5Z90TBE
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-4Z80TBE. (Total nominal capacity of indoor units is between
4.5kW to 14.7kW)
1) Two CS-XZ25VKEW only. (Total nominal cooling capacity is 5.0kW)

15
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, CU-3E18PBE.
CONNECTABLE INDOOR UNIT OUTDOOR UNIT
CU-2E12SBE* CU-2E15SBE* CU-2E18SBE* CU-3E23SBE* CU-3E18PBE*
ROOM
TYPE
A B A B A B A B C A B C
Wall
1.6kW CS-MZ16VKE
CS-MRZ16VKE ●●●●●●●●●●●●
2.0kW
CS-Z20VKEW
CS-XZ20VKEW
CS-RZ20VKEW
●●●●●●●●●●●●
2.5kW
CS-Z25VKEW
CS-XZ25VKEW
CS-RZ25VKEW
●●●●●●●●●●●●
3.2kW
CS-Z35VKEW
CS-XZ35VKEW
CS-RZ35VKEW
●– ●– ●●●●●●●–
4.0kW CS-Z42VKEW
CS-RZ42VKEW – – – – ●– ●●– ●●–
5.0kW
CS-Z50VKEW
CS-XZ50VKEW
CS-RZ50VKEW
– – – – ●– ●●– ●– –
6.0kW CS-RZ60VKEW – – – – – – ●– – – – –
Capacity range of
connectable units
From 3.2kW to
5.7kW
From 3.2kW to
5.7kW
From 3.2kW to
7.5kW From 4.5kW to 11.0kW From 4.5kW to 9.0kW
Pipe length
1 room maximum pipe length (m) 20 20 20 25 25
Allowable elevation (m) 10 10 10 15 15
Total allowable pipe length (m) 30 30 30 60 50
Total pipe length for maximum
chargeless length (m) 20 20 20 30 30
Additional gas amount over
chargeless length (g/m) 15 15 15 20 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 5.7kW)
1) Two CS-XZ20VKEW only. (Total nominal cooling capacity is 4.0kW)
Remarks for CU-3E23SBE / CU-3E18PBE
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
4.5kW to 11.0kW)
1) Two CS-XZ25VKEW only. (Total nominal cooling capacity is 5.0kW)
Note*: Above outdoor unit is contains and operates with refrigerant R410A gas.

16
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 OUTDOOR UNIT
CU-4E23PBE* CU-4E27PBE* CU-5E34PBE*
ROOM
TYPE
A B C D A B C D A B C D E
Wall
1.6kW CS-MZ16VKE
CS-MRZ16VKE ●●●●●●●●●●●●●
2.0kW
CS-Z20VKEW
CS-XZ20VKEW
CS-RZ20VKEW
●●●●●●●●●●●●●
2.5kW
CS-Z25VKEW
CS-XZ25VKEW
CS-RZ25VKEW
●●●●●●●●●●●●●
3.2kW
CS-Z35VKEW
CS-XZ35VKEW
CS-RZ35VKEW
●●●– ●●●●●●●●●
4.0kW CS-Z42VKEW
CS-RZ42VKEW ●●– – ●●●– ●●●●–
5.0kW
CS-Z50VKEW
CS-XZ50VKEW
CS-RZ50VKEW
●●– – ●●– – ●●●– –
6.0kW CS-RZ60VKEW ●– – – ●●– – ●●– – –
7.1kW CS-Z71VKEW
CS-RZ71VKEW – – – – ●– – – ●●– – –
Capacity range of
connectable units From 4.5kW to 11.0kW From 4.5kW to 13.6kW From 4.5kW 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) 60 70 80
Total pipe length for maximum
chargeless length (m) 30 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-XZ25VKEW only. (Total nominal cooling capacity is 5.0kW)
Note*: Above outdoor unit is contains and operates with refrigerant R410A gas.

17
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)
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
onanoeTM X operation provides clean air, moisturises your skin and hair, deodorizes odours in the room
Serviceability Feature
oActivation and Deactivation Method for Heating Only Mode
oBreakdown Self Diagnosis function

18
5. Location of Controls and Components
5.1 Indoor Unit
5.2 Remote Control
x
Front panel
Air Filters
Auto OFF/ON button
Use when remote control is misplace
d
or a malfunction occurs.
Vertical airflow direction louver
Do not adjust by hand.
Horizontal airflow direction louver
Do not adjust by hand.
A
luminium fin
Human activity
sensor
Remote Control Receiver
Indicator
POWER
TIMER
nanoe X
TIMER
OFF
TIMER
ON
Sleep operation
Operation mode
Mild Dry mode
Timer setting
Temperature setting
Fan speed selection
Clock setting
Airflow direction adjustment
Remote control
display
POWERFUL/QUIET
operation
nanoe X operation OFF/ON

19
6. Dimensions
(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
Right piping
hole
<Remote Control Holder>
59
165 (Close)
217 (Open)
69
64
<Remote Control>

20
7. Refrigeration Cycle Diagram
INDOO
R
INTAKE
AIR
TEMP.
SENSOR
PIPE
TEMP.
SENSOR 1
PIPE
TEMP.
SENSOR 2
LIQUID
SIDE
2-WAY
VALVE
3-WAY
VALVE
GAS
SIDE
COOLING
HEAT EXCHANGER
(EVAPORATOR)
HEATING