Fujitsu ASYG18KLCA Installation guide

Fujitsu ASYG18KLCA Installation guide
Wall Mounted Type
PART No. 9319357102
[Original instructions]
For authorized service personnel only.
INSTALLATION WORK ..................................................................... 4
ELECTRICAL WIRING ..................................................................... 6
FINISHING ........................................................................................ 7
REMOVING AND REPLACING PARTS ............................................ 7
10. TEST RUN ......................................................................................... 8
11. REMOTE CONTROLLER INSTALLATION........................................ 8
12. FUNCTION SETTING........................................................................ 8
• Be sure to read this manual thoroughly before installation.
• The warnings and precautions indicated in this manual contain important information
pertaining to your safety. Be sure to observe them.
• Hand this manual, together with the operating manual, to the customer. Request the
customer to keep them on hand for future use, such as for relocating or repairing the
Indicates a potentially or imminently hazardous situation
which, if not avoided, could result in death or serious injury.
Indicates a potentially hazardous situation that may result in
minor or moderate injury or damage to property.
• Installation of this product must be done by experienced service technicians or professional installers only in accordance with this manual. Installation by non-professional
or improper installation of the product might cause serious accidents such as injury,
water leakage, electric shock, or fire. If the product is installed in disregard of the
instructions in this manual, it will void the manufacturer’s warranty.
• Do not turn on the power until all work has been completed. Turning on the power before the work is completed can cause serious accidents such as electric shock or fire.
• If refrigerant leaks when you are working, ventilate the area. If the leaking refrigerant
is exposed to a direct flame, it may produce a toxic gas.
• Installation must be performed in accordance with regulations, codes, or standards for
electrical wiring and equipment in each country, region, or the installation place.
• Do not use means to accelerate the defrosting process or to clean, other than those
recommended by the manufacturer.
• This appliance is not intended for use by persons (including children) with reduced
physical, sensory or mental capabilities, or lack of experience and knowledge, unless
they have been given supervision or instruction concerning use of the appliance by a
person responsible for their safety. Children should be supervised to ensure that they
do not play with the appliance.
• To avoid danger of suffocation, keep the plastic bag or thin film used as the packaging
material away from young children.
• The appliance shall be stored in a room without continuously operating ignition
sources (for example: open flames, an operating gas appliance or an operating
electric heater).
• Do not pierce or burn.
• Be aware that refrigerants may not contain an odour.
• Be careful not to scratch the air conditioner when handling it.
Precautions for using R32 refrigerant
13. CUSTOMER GUIDANCE .................................................................. 9
14. ERROR CODES .............................................................................. 10
SELECTING THE MOUNTING POSITION ....................................... 4
ELECTRICAL REQUIREMENT ......................................................... 4
The basic installation work procedures are the same as conventional refrigerant (R410A,
R22) models.
However, pay careful attention to the following points:
Since the working pressure is 1.6 times 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.
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 1/2-20 UNF.]
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)
• That the installation of pipe-work shall be kept to a minimum.
• That pipe-work shall be protected from physical damage.
• That compliance with national gas regulations shall be observed.
• That mechanical connections shall be accessible for maintenance purposes.
• In cases that require mechanical ventilation, ventilation openings shall be kept clear
of obstruction.
• When disposing of the product is used, be based on national regulations, properly
GENERAL SPECIFICATION ............................................................. 4
ABOUT THIS PRODUCT................................................................... 3
SAFETY PRECAUTIONS .................................................................. 1
• Read carefully all safety information written in this manual before you install or use the
air conditioner.
• Install the product by following local codes and regulations in force at the place of
installation, and the instructions provided by the manufacturer.
• This product is part of a set constituting an air conditioner. The product must not be
installed alone or be installed with a device not authorized by the manufacturer.
• Always use a separate power supply line protected by a circuit breaker operating on
all wires with a distance between contact of 3 mm for this product.
• To protect the persons, earth (ground) the product correctly, and use the power cable
combined with an Earth Leakage Circuit Breaker (ELCB).
• This product is not explosion proof, and therefore should not be installed in an explosive atmosphere.
• To avoid getting an electric shock, never touch the electrical components soon after
the power supply has been turned off. After turning off the power, always wait 5 minutes or more before you touch the electrical components.
• This product contains no user-serviceable parts. Always consult experienced service
technicians for repairing.
• When moving or relocating the air conditioner, consult experienced service technicians
for disconnection and reinstallation of the product.
• Do not touch the aluminum fins of heat exchanger built-in the indoor or outdoor unit to
avoid personal injury when you install or maintain the unit.
• Do not place any other electrical products or household belongings under the product.
Condensation dripping from the product might get them wet, and may cause damage
or malfunction to the property.
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2-1 Service personnel
• Any 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 authorises 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
• 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 minimized. For repair to the refrigerating system, the precautions in 2-2 to 2-8 shall be complied with prior to 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 on the
nature of work being carried out.
• Work in confined spaces shall be avoided.
• The area around the workspace shall be sectioned off.
• Ensure that the conditions within the area have been made safe by control of flammable material.
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. nonsparking, adequately sealed or intrinsically safe.
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 CO2 fire extinguisher adjacent to the charging area.
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
• 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
- 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 suitably 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.
• 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.
• This shall be reported to the owner of the equipment so all parties are advised.
• Initial safety checks shall include.
- That capacitors are discharged: this shall be done in a safe manner to avoid possibility of sparking.
- That there no live electrical components and wiring are exposed while charging,
recovering or purging the system.
- That there is continuity of earth bonding.
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
• 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
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.
• Other parts may result in the ignition of refrigerant in the atmosphere from a leak.
• 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
for or detection of refrigerant leaks.
• A halide torch (or any other detector using a naked flame) shall not be used.
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
• Ensure that the outlet for the vacuum pump is not close to any ignition sources and
there is ventilation available.
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9-Charging procedures
• In addition to conventional charging procedures, the following requirements shall be
- 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
- Label the system when charging is complete (if not already).
- Extreme care shall be taken not to overfill the refrigeration system.
• Prior to recharging the system it shall be pressure tested with OFN.
• 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.
• 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
h) Do not overfill 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.
• 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.
• 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
• 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.
• Empty recovery cylinders are evacuated and, if possible, cooled before recovery
• 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
• 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
• Only electric heating to the compressor body shall be employed to accelerate this
• When oil is drained from a system, it shall be carried out safely.
Explanation of symbols displayed on the indoor unit or outdoor unit.
This symbol shows that this appliance uses a flammable
If the refrigerant is leaked and exposed to an external ignition source, there is a risk of fire.
This symbol shows that the operation manual should be
read carefully.
This symbol shows that a service personnel should be
handling this equipment with reference to the installation
This symbol shows that information is available such as
the operating manual or installation manual.
2.1. Special tools for R32 (R410A)
Tool name
Gauge manifold
Change from R22 to R32 (R410A)
Pressure is high and cannot be measured with a R22
gauge. To prevent erroneous mixing of other refrigerants,
the diameter of each port has been changed.
It is recommended to use gauge with seals -0.1 to 5.3 MPa
(-1 to 53 bar) for high pressure.
-0.1 to 3.8 MPa (-1 to 38 bar) for low pressure.
Charge hose
To increase pressure resistance, the hose material and base
size were changed. (R32/R410A)
Vacuum pump
A conventional vacuum pump can be used by installing a
vacuum pump adapter.
(Use of a vacuum pump with a series motor is prohibited.)
Gas leakage detector
Special gas leakage detector for HFC refrigerant R410A or
Copper pipes
It is necessary to use seamless copper pipes and it is desirable that the amount of residual
oil is less than 40 mg/10 m. Do not use copper pipes having a collapsed, deformed or
discolored portion (especially on the interior surface). Otherwise, the expansion value or
capillary tube may become blocked with contaminants.
As an air conditioner using R32 (R410A) incurs pressure higher than when using R22, it is
necessary to choose adequate materials.
• Do not use the existing (for R22) piping and flare nuts.
If the existing materials are used, the pressure inside the refrigerant cycle will rise and
cause failure, injury, etc. (Use the special R32/R410A materials.)
• Use (refill or replace with) specified refrigerant (R32) only. Use of unspecified refrigerant can cause product malfunction, burst, or injury.
• Do not mix any gas or impurities except specified refrigerant (R32). Inflow of air or application of unspecified material makes the internal pressure of the refrigerant cycle too
high, and may cause product malfunction, burst of piping, or injury.
• For installation purposes, be sure to use the parts supplied by the manufacturer or
other prescribed parts. The use of non-prescribed parts can cause serious accidents
such as the unit falling, water leakage, electric shock, or fire.
• Do not turn on the power until all work has been completed.
This manual describes how to install the indoor unit only. To install the outdoor unit or
branch box, (if any), refer to the installation manual included in each product.
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2.2. Accessories
The following installation accessories are supplied. Use them as required.
Name and Shape
Operating Manual
Name and Shape
Installation Manual
(This manual)
The indoor unit is powered from the outdoor unit. Do not power indoor unit from separate
power source.
Cloth tape
Operating Manual
Tapping screws (large)
Tapping screws (small)
Conductor size [mm2]
Connection cable
Type 60245 IEC 57
3 cable + Earth (Ground),
1 Ø 230 V
Cable Length: Limit voltage drop to less than 2%. Increase cable gauge if voltage drop is
2% or more.
Remote controller
Standard for electrical wiring and equipment differs in each country or region. Before you
start electrical working, confirm related regulations, codes, or standards.
Decide the mounting position with the customer as follows:
Remote controller holder
Wall hook bracket
The following items are necessary to install this air conditioner. (The items are not included with the air conditioner and must be purchased separately.)
Additional materials
Connection pipe assembly
Install the indoor unit where is capable to support the weight of the unit. Secure the
unit firmly so that the unit does not topple or fall.
Wall cap
Connection cable (4-conductor)
Wall pipe
Drain hose
Decorative tape
Tapping screws
Vinyl tape
This installation manual briefly outlines where and how to install the air conditioning
system. Please read over the entire set of instructions for the indoor and outdoor units and
make sure all accessory parts listed are with the system before beginning.
3.1. Type of copper pipe and insulation material
Refer to the installation manual for the outdoor unit for description of allowable pipe
length and height difference.
Capacity of indoor
(1) Install the indoor unit level on a strong wall which is not subject to vibration.
(2) The inlet and outlet ports should not be obstructed: the air should be able to blow all
over the room.
(3) Install the unit a dedicated electrical branch circuit.
(4) Do not install the unit where it will be exposed to direct sunlight.
(5) Install the unit where connection to the outdoor unit is easy.
(6) Install the unit where the drain pipe can be easily installed.
(7) Take servicing, etc. into consideration and leave the spaces shown in “6.1. Installation
dimensions”. Also install the unit where the filter can be removed.
Correct initial installation location is important because it is difficult to move the unit after it
is installed.
Gas pipe size
(thickness) [mm]
Ø 9.52(0.8)
Ø 12.70(0.8)
Liquid pipe size
(thickness) [mm]
Ø 6.35(0.8)
Ø 6.35(0.8)
• Wrap heat insulation around both gas pipe and liquid pipe.
No heat-insulation work or incorrect heat-insulation work may cause water leaks.
• In a reverse cycle model, use heat insulation with heat resistance above 120 °C.
• If expected humidity of the installation location of refrigerant pipes is higher than 70
%, wrap the heat insulation around the refrigerant pipes.
If the expected humidity is between 70 % and 80 %, use heat insulation that has
a thickness of 15 mm or more.
If the expected humidity is higher than 80 %, use heat insulation that has a thickness
of 20 mm or more.
• The use of thinner heat insulation than specified above, may cause a condensation
on the surface of the insulation.
• Use heat insulation with thermal conductivity of 0.045 W/(m•K) or less, at 20 °C.
Do not install the unit in the following areas:
• Area with high salt content, such as at the seaside. It will deteriorate metal parts, causing the parts to fail or the unit to leak water.
• Area filled with mineral oil or containing a large amount of splashed oil or steam, such
as a kitchen. It will deteriorate plastic parts, causing the parts to fail or the unit to leak
• Area where is close to heat sources.
• Area that generates substances that adversely affect the equipment, such as sulfuric
gas, chlorine gas, acid, or alkali. It will cause the copper pipes and brazed joints to corrode, which can cause refrigerant leakage.
• Area that can cause combustible gas to leak, contains suspended carbon fibers or
flammable dust, or volatile in flammables such as paint thinner or gasoline.
• If gas leaks and settles around the unit, it can cause a fire.
• Area where animals may urinate on the unit or ammonia may be generated.
• Do not use the unit for special purposes, such as storing food, raising animals, growing plants, or preserving precision devices or art objects. It can degrade the quality of
the preserved or stored objects.
• Install the unit where drainage does not cause any trouble.
• Install the indoor unit, outdoor unit, power supply cable, transmission cable, and remote control cable at least 1 m away from a television or radio receivers. The purpose
of this is to prevent TV reception interference or radio noise.
(Even if they are installed more than 1 m apart, you could still receive noise under
some signal conditions.)
• If children under 10 years old may approach the unit, take preventive measures so that
they cannot reach the unit.
• Install the indoor unit on the wall where the height from the floor is more than 1.8 m.
During transportation or relocation of the indoor unit, pipes shall be covered with the
wall hook bracket for protection. Do not move the appliance by holding the indoor unit
(The stress applied to the pipe joints may cause the flammable gas to leak during
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6.1. Installation dimensions
6.4. Installing the wall hook bracket
(1) Install the wall hook bracket so that it is correctly positioned horizontally and vertically.
If the wall hook bracket is titled, water will drip to the floor.
(2) Install the wall hook bracket so that it is strong enough to withstand the weight of an
Wall hook bracket
83 mm or more
70 mm or more
• Fasten the wall hook bracket to the wall with 5 or more screws through the holes near
the outer edge of the bracket.
• Check that there is no rattle at the wall hook bracket.
85 mm
or more
Wall hook bracket
1500 mm or more
1800 mm or more
(Wall cap)
The flare
part should
be installed
Tapping screw
Install the wall-hook bracket both horizontally and vertically aligned.
Misaligned installation may cause water leakage.
6.2. Indoor unit piping direction
The piping can be connected in 2 directions. When the piping is connected in direction (B),
cut out a hole in the under cover along the piping groove with a hacksaw.
6.5. Forming the drain hose and pipe
• Insert drain hose and drain cap securely. Drain should slope down to avoid water leakage.
• When inserting the drain hose, no other material than water should be applied.
Application of other material than water will cause deterioration of the hose, and may
cause water leakage.
• After you remove a drain hose, be sure to attach the drain cap.
• When you secure the piping and drain hose with tape, arrange the drain hose so that
it is at the bottom of the piping.
• For drain hose piping in low temperature environment, you need to apply freeze
protection to prevent a frozen drain hose.
After cooling operation is performed in low temperature environment (when outdoor
temperature under 0 °C), water in the drain hose could be frozen. Frozen drain water
will block the water flow in the hose, and may cause water leakage at the indoor unit.
2 Right
1 Rear outlet
6.3. Cutting the hole in the wall for connecting the pipes
Cut a 65 mm diameter hole in the wall at the position shown in the following.
Cut the hole so that the outside end is lower (5 to 10 mm) than the inside end.
Always align the center of the wall hole. If misaligned, water leakage will occur.
Cut the wall pipe to match the wall thickness, stick it into the wall cap, fasten the cap with
vinyl tape, and stick the pipe through the hole.
(5) For the right piping, cut the hole a little lower so that drain water will flow freely.
Wall hook bracket
[Rear piping, Right piping]
• Install the indoor unit piping in the direction of the wall hole and bind the drain hose
and pipe together with vinyl tape.
• Install the piping so that the drain hose is at the bottom.
• Wrap the pipes of the indoor unit that are visible from the outside.
Center mark
Right piping
65 mm dia. hole
65 mm dia. hole
Pipe (top) Rear piping
Indoor unit drain hose (bottom)
Bind with vinyl tape
Fasten with vinyl tape *
5~10 mm
Wall cap *
Insert the drain hose and drain cap into the drain port, making sure that it comes
in contact with the back of the drain port, and then mount it. If the drain hose is not
connected properly, leaking will occur.
Wall pipe *
* Locally purchased
Always use the wall pipe. If the wall pipe is not used, the cable that is connected between
the indoor unit and the outdoor unit may touch metal, and cause an electric discharge.
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[Installing the indoor unit]
6.6.3. Flare connection
• Hang the indoor unit from the hooks at the top of the wall hook bracket.
• Insert the spacer, etc. between the indoor unit and the wall hook bracket and separate
the bottom of the indoor unit from the wall.
Top hooks
The flare connection shall not be performed indoors.
Indoor unit
Bottom hooks
Wall hook bracket
Bottom hooks
• After hooking the indoor unit to the top hook, hook the fittings of the indoor unit to the
bottom hooks while lowering the unit and pushing it against the wall.
6.6. Pipe connection
Tighten the flare nuts with a torque wrench using the specified tightening method.
Otherwise, the flare nuts could break after a prolonged period, causing refrigerant to leak
and generate hazardous gas if the refrigerant comes into contact with a flame.
• Be sure to install the pipe against the port on the indoor unit correctly. If the centering is improper, the flare nut cannot be tightened smoothly. If the flare nut is forced
to turn, the threads will be damaged.
• Do not remove the flare nut from the indoor unit pipe until immediately before connecting the connection pipe.
• Hold the torque wrench at its grip, keeping it in the right angle with the pipe, in order
to tighten the flare nut correctly.
• Tighten the flare nuts with a torque wrench using the specified tightening method.
Otherwise, the flare nuts could break after a prolonged period, causing refrigerant to
leak and generate hazardous gas if the refrigerant comes into contact with a flame.
• Connect the piping so that the control box cover can easily be removed for servicing when necessary.
• In order to prevent water from leaking into the control box, make sure that the piping is well insulated.
When the flare nut is tightened properly by your hand, hold the body side coupling with a
wrench, then tighten with a torque wrench. (See the following table for the flare nut tightening torques.)
6.6.1. Flaring
Use special pipe cutter and flare tool designed for R410A or R32 pipework.
(1) Cut the connection pipe to the necessary length with a pipe cutter.
(2) Hold the pipe downward so that cuttings will not enter the pipe and remove any burrs.
(3) Insert the flare nut (always use the flare nut attached to the indoor unit(s) and outdoor
unit or branch box respectively) onto the pipe and perform the flare processing with a
flare tool. Use the special R410A or R32 flare tool, or the conventional flare tool. Leakage of refrigerant may result if other flare nuts are used.
(4) Protect the pipes by pinching them or with tape to prevent dust, dirt, or water from
entering the pipes.
Check if [L] is flared uniformly
and is not cracked or scratched.
Pipe outside diameter
[mm (in.)]
6.35 (1/4)
9.52 (3/8)
12.70 (1/2)
15.88 (5/8)
19.05 (3/4)
Holding wrench
Flare nut
Torque wrench
Indoor unit pipe
(Body side)
Connection pipe
Flare nut [mm (in.)]
Tightening torque [N·m (kgf·cm)]
6.35 (1/4) dia.
9.52 (3/8) dia.
12.70 (1/2) dia.
15.88 (5/8) dia.
19.05 (3/4) dia.
16 to 18 (160 to 180)
32 to 42 (320 to 420)
49 to 61 (490 to 610)
63 to 75 (630 to 750)
90 to 110 (900 to 1,100)
Do not remove the cap from the connection pipe before connecting the pipe.
Dimension A [mm]
Flare tool for R32,
clutch type
Dimension B [mm]
0 to 0.5
When using conventional flare tools to flare R32 pipes, the dimension A should be approximately 0.5 mm more than indicated in the table (for flaring with R32 flare tools) to achieve
the specified flaring. Use a thickness gauge to measure the dimension A.
Width across
Tighten with 2 wrenches.
Pipe outside diameter [mm (in.)]
Width across flats
of Flare nut [mm]
6.35 (1/4)
9.52 (3/8)
12.70 (1/2)
15.88 (5/8)
19.05 (3/4)
• Before connecting the wires, make sure the power supply is OFF.
• Every wire must be connected firmly.
• No wire should be allowed to touch refrigerant tubing, the compressor, or any moving part.
• Loose wiring may cause the terminal to overheat or result in unit malfunction. A fire
hazard may also exist. Therefore, be sure all wiring is tightly connected.
• Connect wires to the matching numbers of terminals.
Be careful not to generate a spark as follows for using a flammable refrigerant.
• Do not remove the fuse while the power is on.
• Do not disconnect the wiring while the power is on.
• It is recommended to position the outlet connection in a high position. Place the
cords so that they do not get tangled.
6.6.2. Bending pipes
• To prevent breaking of the pipe, avoid sharp bends.
• If the pipe is bent repeatedly at the same place, it will break.
The pipes are shaped by your hands. Be careful not to collapse them.
Bend R70 mm or more with a pipe bender.
Do not bend the pipes in an angle more than 90°.
When pipes are repeatedly bend or stretched, the material will harden, making it difficult
to bend or stretch them anymore.
• Do not bend or stretch the pipes more than 3 times.
• When bending the pipe, do not bend it as
is. The pipe will be collapsed. In this case,
cut the insulating pipe with a sharp cutter
as shown on the right, and bend it after
exposing the pipe. After bending the pipe
as you want, be sure to put the heat insulating pipe back on the pipe, and secure it
with tape.
7.1. Wiring system diagram
Type 60245 IEC57
Cable size 1.5 mm2
Power line
Control line
Please connect to the
specified terminal.
Earth (Ground) line
Cut line
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7.2. Indoor unit wiring
(1) Remove the intake grille. (Refer to “9.1. Intake grille removal and installation”.)
(2) Remove the tapping screw for the wire cover and the wire cover. (Wire covers A and B
come off together.)
Wire cover
Cable clamp
• Match the terminal block numbers and connection cable colors with those of the
outdoor unit. Incorrect wiring may cause a fire.
• Connect the connection cables firmly to the terminal block. Imperfect installation may
cause a fire.
• When fixing the connection cable with the cable clamp, always fasten the cable at the
plastic jacket portion, but not at the insulator portion. If the insulator is chafed, electric
leakage may occur.
• Always connect the earth (ground) wire. Improper earthing (grounding) work can
cause electric shocks.
• Do not use the earth (ground) screw for the indoor unit to the outdoor unit unless it is
60 mm
40 mm
(1) Insulate between pipes.
• Insulate suction and discharge pipes separately.
• For rear, right, and bottom piping, overlap the connection pipe heat insulation and
indoor unit pipe heat insulation and bind them with vinyl tape so that there is no gap.
(2) Temporarily fasten the connection cable along the connection pipe with vinyl tape.
(Wrap to about 1/3 the width of the tape from the bottom of the pipe so that water
does not enter.)
(3) Fasten the connection pipe to the outside wall with a saddle, etc.
(4) Fill the gap between the outside wall pipe hole and the pipe with sealer so that rain
water and wind cannot blow in.
(5) Fasten the drain hose to the outside wall, etc.
(6) Check the drainage.
Outside wall cap*
Sealer putty*
Connection cable
(3) Remove the tapping screw and while minding the cable clamp hook, remove the cable
Cable clamp
Overlap the insulation
Connection pipe
(heat insulation)
Indoor unit pipe
(heat insulation)
Vinyl tape*
Bind the pipes together
so that there is no gap.
Insert the tab into the square hole of the
indoor unit and fasten with a screw.
*Locally purchased
Wrap with cloth tape.
7.3. How to connect wiring to the terminals
Drain hose
Cloth tape (accessory)
Caution when wiring cable
To strip off the insulation of a lead wire, always use a special tool such as a wire stripper.
If there is no special tool, carefully strip off the insulation by using a knife or other utensil.
(1) Use ring terminals with insulating sleeves as shown in the figure to connect to the
terminal block.
(2) Securely clamp the ring terminals to the wires by using an appropriate tool so that the
wires do not come loose.
Strip : 10 mm
Drain hose
Lifted up
End in water
Ring terminal
(3) Connect specified wires securely, and fasten them so that there is no stress applied on
the terminals.
(4) Use a screwdriver with an appropriate bit size to tighten the terminal screws. Using of
screwdriver with inappropriate bit size will damage the screw heads, and the screws
will not be tightened properly.
(5) Do not overtighten the terminal screws. Otherwise, the screws may break.
Screw with special washer
9.1. Intake grille removal and installation
Intake grille removal
(1) Open the intake grille.
(2) Pull down the knob.
(3) Lift the intake grille upward, until the axle at the top of the intake grille is removed.
Screw with special washer
Ring terminal
Intake grille
Ring terminal
Terminal blocks
(6) See the table for the terminal screw tightening torques.
Tightening torque [N·m (kgf·cm)]
M4 screw
1.2 to 1.8 (12 to 18)
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Intake grille installation
(1) The fixing axle of the intake grille is installed on the Panel.
(2) Lay down the intake grille.
Check that the indoor unit correctly receives the signal from the remote controller, then
install the remote controller holder.
Intake grille
Do not install the remote controller holder in the following conditions:
• Any places exposed in direct sunlight
• Positions affected by the heat from a stove or heater
Mounting shaft
Front panel
11.1. Remote controller holder installation
9.2. Front panel / control cover removal and installation
* In this description, the intake grille and wire cover already has been removed.
 Install the remote controller a maximum distance of 7 m from the remote control signal
receiver. After installing the remote controller, check that it operates correctly.
 Install the remote controller holder to a wall, pillar, etc. with the tapping screw.
9.2.1. Front panel / control cover / under cover removal
1 Set
Remove intake grille (Reference the intake grille removal.)
Remove wire cover.
Remove the 4 screws.
The front panel is pulled to the front, raising the upper surface, and a front panel is
(2 position)
Remote controller
2 Push
Screws cover
(small, accessories)
Front panel
Front panel
9.2.2. Front panel / control cover / under cover installation
Firstly, fit the lower part of the front panel, and insert top and bottom hooks. (3 top
sides, 6 bottom sides)
3 screws is attached.
The wire cover is attached.
The intake grille is attached.
Perform the Function Setting according to the installation conditions using the remote
• Confirm whether the wiring work for outdoor unit has been finished.
• Confirm that the cover for the electrical enclosure on the outdoor unit is in place.
Bottom hooks
(6 position)
Bottom holes
(6 position)
Front panel
Top holes
(3 position)
Top hooks
(3 position)
• This procedure changes to the Function Settings used to control the indoor unit
according to the installation conditions. Incorrect settings can cause the indoor unit to
• After the power is turned on, perform the Function Setting according to the installation
conditions using the remote controller.
• The settings may be selected between the following two: Function Number or Setting
• Settings will not be changed if invalid numbers or setting values are selected.
Entering the Function Setting Mode
While pressing the POWERFUL button and SET TEMP. (
RESET button to enter the function setting mode.
Body Center Bottom hooks
(2 position)
Center hooks
(2 position)
Front panel
Please take caution when removing or installing the front panel. If the front panel falls,
there is a risk of injury.
Check items
(1) Is operation of each button on the remote control unit normal?
(2) Does each lamp light normally?
(3) Do air flow direction louvers operate normally?
(4) Is the drain normal?
(5) Do not have an abnormal noise and vibration during operation?
 Do not operate the air conditioner in test run for a long time.
[Operation method]
Before starting the test run, wait for 1 minute after connecting the power supply.
By the wireless remote controller
)” button, the “TEST RUN” button on
 To start the test run, press the “START/STOP(
the remote controller by using the tip of a ballpoint pen or other small object.
By the indoor unit
 To start the test run, keep on pressing the indoor unit button for more than 10 seconds.
 To end test operation, press the remote controller “START/STOP(
)” button.
(When the air conditioner is running by pressing the “TEST RUN” button, the
“OPERATION” Lamp and “TIMER” Lamp will simultaneously flash slowly.)
) simultaneously, press the
Setting the Remote controller Custom Code
Use the following steps to select the custom
code of the remote controller. (Note that the air
conditioner cannot receive a custom code if the
air conditioner has not been set for the custom
code.) The custom code that is set through this
process are applicable only to the custom in the
FUNCTION SETTING. For details on how to set
the custom code through the normal process, refer
to “Remote controller custom code”.
Press the SET TEMP. (
) button to
change the custom code between
Match the code on the display to the
air conditioner custom code. (initially set to ) (If the custom code does not need to
be selected, press the MODE button and proceed to STEP 2.)
Press the MODE button to accept the custom code, and proceed to STEP 2
The air conditioner custom code is set to
prior to shipment.
Contact your retailer to change the custom code.
The remote controller resets to custom code
when the batteries in the remote
controller are replaced. If you use a custom code other than custom code , reset
the custom code after replacing the batteries.
If you do not know the air conditioner custom code setting, try each of the custom
codes ( →
→ ) until you find the code which operates the air conditioner.
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Auto restart
Enable or disable automatic restart after a power interruption.
Setting the Function Number and Setting Value
(♦... Factory setting)
Press the SET TEMP. ( )
( ) buttons to select the function number.
(Press the MODE button to switch between the
left and right digits.)
Press the FAN button to proceed to setting the
(Press the FAN button again to return to the
function number selection.)
Setting Description
* Auto restart is an emergency function such as for power outage etc. Do not attempt to
use this function in normal operation. Be sure to operate the unit by remote controller or
external device.
Press the SET TEMP. ( )
( ) buttons to select the setting value.
(Press the MODE button to switch between the
left and right digits.)
Setting Value
Remote controller custom code
(Only for wireless remote controller)
The indoor unit custom code can be changed. Select the appropriate custom code.
(♦... Factory setting)
Press the SLEEP button, then after you hear
the beep emitted from the indoor unit, press the
START/STOP button to confirm the settings.
Press the RESET button to cancel the function setting mode.
After completing the FUNCTION SETTING, be sure to disconnect the power and
reconnect it again.
Setting Value
Setting Description
After disconnecting the power, wait 10 seconds or more before reconnecting it again.
Indoor unit fan control for energy saving for cooling
The Function Setting does not become active unless the power is disconnected then
reconnected again.
Enables or disables the power-saving function by controlling the indoor unit fan rotation when
the outdoor unit is stopped during cooling operation.
(♦... Factory setting)
12.1. Function Details
Filter sign
Select appropriate intervals for displaying the filter sign on the indoor unit according to the
estimated amount of dust in the air of the room.
If the indication is not required, select “No indication” (03).
(♦... Factory setting)
Setting Value
Setting Description
Setting Value
Setting Description
00: When the outdoor unit is stopped, the indoor unit fan operates continuously following
the setting on the remote controller.
01: When the outdoor unit is stopped, the indoor unit fan operates intermittently at a very
low speed.
Standard (400 hours)
Setting record
Long interval (1,000 hours)
Short interval (200 hours)
No indication
Record any changes to the settings in the following table.
Setting Description
Room temperature control for indoor unit sensor
Depending on the installed environment, correction of the room temperature sensor may
be required.
Select the appropriate control setting according to the installed environment.
The temperature correction values show the difference from the “Standard setting” (00)
(manufacturer’s recommended value).
(♦... Factory setting)
Function Number
(For cooling) (For heating)
Setting Value
Filter sign
Room temperature control for indoor
unit sensor
Auto restart
Remote controller custom code
Indoor unit fan control for energy saving for
After completing the FUNCTION SETTING, be sure to disconnect the power and reconnect it
Setting Description
Standard setting
No correction 0.0 °C
-0.5 °C
-1.0 °C
-1.5 °C
-2.0 °C
-2.5 °C
-3.0 °C
-3.5 °C
-4.0 °C
+0.5 °C
+1.0 °C
+1.5 °C
+2.0 °C
+2.5 °C
+3.0 °C
+3.5 °C
+4.0 °C
Explain the following to the customer in accordance with the operating manual:
(1) Starting and stopping method, operation switching, temperature adjustment, timer, airflow
switching, and other remote control unit operations.
(2) Air filter removal and cleaning, and how to use the air louvers.
(3) Give the operating manual to the customer.
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Error display
If you use a wireless remote controller, the lamp on the photo detector unit will output error
codes by way of blinking patterns. If you use a wired remote controller, error codes will appear on the remote control display. See the lamp blinking patterns and error codes in the
table. An error display is displayed only during operation.
Error display
Error code
Serial communication error
Error code
Intake grille error
Indoor unit fan motor 2 error
(Left side fan)
Indoor unit fan motor 3 error
(Right side fan)
Indoor unit error
Outdoor unit reverse/missing
phase and wiring error
Outdoor unit main PCB
model information error or
communication error
• Wired remote controller
communication error
• Server room control
communication error
Check run unfinished
Automatic airflow adjustment error
Peripheral unit transmission PCB
connection error
Inverter error
External communication error
Active filter error, PFC circuit error
Unit number or Refrigerant circuit
address setting error
[Simultaneous Multi]
Trip terminal L error
Outdoor unit rush current limiting
resister temp. rise error
Display PCB microcomputers
communication error
Discharge temp. sensor error
Compressor temp. sensor error
Outdoor unit Heat Ex. liquid temp.
sensor error
Outdoor temp. sensor error
Suction Gas temp. sensor error
• 2-way valve temp. sensor error
• 3-way valve temp. sensor error
Heat sink temp. sensor error
Indoor unit capacity error
Combination error
• Connection unit number
error (indoor secondary unit)
[Simultaneous Multi]
• Connection unit number error
(indoor unit or branch unit)
[Flexible Multi]
Indoor unit address setting error
Primary unit, secondary unit setup
error [Simultaneous Multi]
Connection unit number error in
wired remote controller system
Power supply interruption error
Indoor unit PCB model
information error
Indoor unit motor electricity
consumption detection error
Liquid pipe temp. sensor error
Manual auto switch error
Current sensor error
Indoor unit power supply error for
fan motor
Indoor unit communication circuit
(wired remote controller) error
Room temp. sensor error
Trip detection
Indoor unit heat ex. middle temp.
sensor error
Compressor rotor position
detection error (permanent stop)
Human sensor error
Outdoor unit fan motor 1 error
Indoor unit fan motor error
Outdoor unit fan motor 2 error
Drain pump error
4-way valve error
Electric air cleaner reverse VDD
Coil (expansion valve) error
Filter set error
Discharge temp. error
Damper error
Compressor temp. error
• Sub-cool Heat Ex. gas inlet
temp. sensor error
• Sub-cool Heat Ex. gas outlet
temp. sensor error
• Discharge pressure sensor error
• Suction pressure sensor error
• High pressure switch error
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Error display
Error code
High pressure error
Low pressure error
Branch boxes error
[Flexible Multi]
Display mode
● : 0.5s ON / 0.5s OFF
◊ : 0.1s ON / 0.1s OFF
( ) : Number of flashing
[Troubleshooting with the indoor unit display]
OPERATION indicator lamp (green)
TIMER indicator lamp (orange)
ECONOMY indicator lamp (green)
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