Fujitsu ARXG-KLLAP Series Installation Manual

AIR CONDITIONER
Duct type

Contents

1. SAFETY PRECAUTIONS .................................................................. 1

1.1. Precautions for using R32 refrigerant ......................................... 2

2. PRODUCT SPECIFICATION ............................................................. 4

2.1. Installation tools .......................................................................... 4

2.2. Accessories ................................................................................ 4

2.3. Pipe requirement ........................................................................4

2.4. Electrical requirement ................................................................. 4

2.5. Optional parts .............................................................................5

3. INSTALLATION WORK ..................................................................... 5

3.1. Selecting an installation location ................................................ 5

3.2. Installation dimensions ...............................................................5

3.3. Installing the unit ......................................................................... 5

3.4. Drain installation ......................................................................... 7

3.5. Pipe installation .......................................................................... 9

3.6. Electrical wiring ......................................................................... 10

3.7. Remote controller setting .......................................................... 13

4. OPTIONAL INSTALLATION WORK ................................................ 13

4.1. Optional kit installation .............................................................. 13

4.2. External input and output .......................................................... 13

4.3. Remote sensor (Optional parts) ............................................... 14

4.4. IR receiver unit (Optional parts) ................................................ 14

4.5. Auto louver grille (Optional parts) ............................................. 14

4.6. Other optional parts .................................................................. 14

4.7. Optional parts cable binding ..................................................... 15

5. REMOTE CONTROL INSTALLATION ............................................. 15

5.1. Group control ............................................................................ 15

5.2. Multiple remote control .............................................................16

5.3. DIP switch 101 setting .............................................................. 16

5.4. Simultaneous multi-system operation ....................................... 17

6. FUNCTION SETTING...................................................................... 17

6.1. Function details ........................................................................ 17

7. TEST RUN ....................................................................................... 19

7.1. Check items .............................................................................. 19

7.2. Operation method ..................................................................... 19

8. FINISHING ...................................................................................... 19

9. CUSTOMER GUIDANCE ................................................................19

10. ERROR CODES .............................................................................. 19

NOTES:

This manual describes how to install the air conditioner described above. Handling

and installation shall only be done by professionals as outlined in this manual.

1. SAFETY PRECAUTIONS

• 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
unit.

WARNING

Indicates a potentially or imminently hazardous situation
which, if not avoided, could result in death or serious injury.

INSTALLATION MANUAL

PART No. 9374342532

[Original instructions] For authorized service personnel only.

WARNING

• The appliance shall be installed, operated and stored in a room with a fl oor area larger
than X m².

Amount of refrigerant charge

M (kg)

M ≤ 1.22

1.22 < M ≤ 1.23

1.23 < M ≤ 1.50 2.15

1.50 < M ≤ 1.75 2.92

1.75 < M ≤ 2.0 3.82

2.0 < M ≤ 2.5 5.96

2.5 < M ≤ 3.0 8.59

3.0 < M ≤ 3.5 11.68

3.5 < M ≤ 4.0 15.26

• 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 fi re. 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 fi re.

• If refrigerant leaks when you are working, ventilate the area. If the leaking refrigerant
is exposed to a direct fl ame, 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 fi lm 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 fl ames, an operating gas appliance or an operating
electric heater).

• Do not pierce or burn.

• Be aware that refrigerants may not contain an odour.

CAUTION

• 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 fi ns 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.

• Be careful not to scratch the air conditioner when handling it.

Minimum room area

2

)

X (m

-

1.45

(IEC 60335-2-40)

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Türkçe

Türkçe

CAUTION

Indicates a potentially hazardous situation that may result in
minor or moderate injury or damage to property.

En-1

1.1. Precautions 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:

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. (Refer to “2.1. Instal­lation tools”.)
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
fl are nuts on the outdoor unit side.
For R32 and R410A, the same fl are 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.)

CAUTION

1-Installation (Space)

• That the installation of pipe-work shall be kept to a minimum.

• That pipe-work shall be protected from physical damage.

• The appliance shall not be installed in an unventilated space, if that space is smaller
than X m².

Amount of refrigerant charge

M (kg)

M ≤ 1.22

1.22 < M ≤ 1.23

1.23 < M ≤ 1.50 2.15

1.50 < M ≤ 1.75 2.92

1.75 < M ≤ 2.0 3.82

2.0 < M ≤ 2.5 5.96

2.5 < M ≤ 3.0 8.59

3.0 < M ≤ 3.5 11.68

3.5 < M ≤ 4.0 15.26

• 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
processed.

2-Servicing
2-1 Service personnel

• Any person who is involved with working on or breaking into a refrigerant circuit
should hold a current valid certifi cate from an industry-accredited assessment
authority, which authorises their competence to handle refrigerants safely in accor­dance with an industry recognised assessment specifi cation.

• 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 fl ammable
refrigerants.

• Servicing shall be performed only as recommended by the manufacturer.

2-2 Work

• Prior to beginning work on systems containing fl ammable 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 fl ammable 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 confi ned 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 fl am-
mable 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 fl ammable atmospheres.

• Ensure that the leak detection equipment being used is suitable for use with fl am-
mable refrigerants, i.e. nonsparking, adequately sealed or intrinsically safe.

2-4 Presence of fi re extinguisher

• If any hot work is to be conducted on the refrigeration equipment or any associated
parts, appropriate fi re extinguishing equipment shall be available at hand.

• Have a dry powder or CO

fi re extinguisher adjacent to the charging area.

2

Minimum room area

2

)

X (m

-

1.45

(IEC 60335-2-40)

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 fl ammable refrigerant shall
use any sources of ignition in such a manner that it may lead to the risk of fi re or
explosion.

• All possible ignition sources, including cigarette smoking, should be kept suffi ciently
far away from the site of installation, repairing, removing and disposal, during which
fl ammable 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 fl ammable 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 fi t for the purpose
and to the correct specifi cation.

• 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 fl ammable 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 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
affected.

• This shall include damage to cables, excessive number of connections, terminals not
made to original specifi cation, damage to seals, incorrect fi tting 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 fl ammable atmospheres.

• Replacement parts shall be in accordance with the manufacturer’s specifi cations.

NOTES: 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 fl ammable atmosphere.

• The test apparatus shall be at the correct rating.

• Replace components only with parts specifi ed by the manufacturer.

• Other parts may result in the ignition of refrigerant in the atmosphere from a leak.

En-2

CAUTION

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 fl ammable 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 fl ame) shall not be used.

7-Leak detection methods

• Electronic leak detectors shall be used to detect fl ammable 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 confi rmed.

• Leak detection fl uids 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 fl ames 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 fl ammability is a consid-
eration.
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 “fl ushed” 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 fi ll until the working pressure is achieved, then venting to atmosphere,
and fi nally pulling down to a vacuum.

• This process shall be repeated until no refrigerant is within the system.

• When the fi nal 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 overfi ll 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.

CAUTION

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 overfi ll 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 fi lled 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 un-

less it has been cleaned and checked.

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 fl am-
mable 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.

• Empty 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
fl ammable 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 fl ammable 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.

Explanation of symbols displayed on the indoor unit or outdoor unit.

This symbol shows that this appliance uses a fl ammable

WARNING

CAUTION

CAUTION

CAUTION

refrigerant.
If the refrigerant is leaked and exposed to an external igni­tion source, there is a risk of fi re.

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
manual.

This symbol shows that information is available such as
the operating manual or installation manual.

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2. PRODUCT SPECIFICATION

2.1. Installation tools

Tool name Change from R22 to R32 (R410A)

Pressure is high and cannot be measured with a R22
gauge. To prevent erroneous mixing of other refrigerants,

Gauge manifold

Charge hose

Vacuum pump

Gas leakage detector

■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 fl are 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 (refi ll or replace with) specifi ed refrigerant (R32) only. Use of unspecifi ed refriger-

ant can cause product malfunction, burst, or injury.

• Do not mix any gas or impurities except specifi ed refrigerant (R32). Infl ow of air or ap-

plication of unspecifi ed 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 fi re.

• 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.

2.2. Accessories

• 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 to fall, water leakage, electric shock, or fi re.

• Keep the Installation manual in a safe place and do not discard any other accessories

until the installation work has been completed.

The following installation accessories are supplied. Use them as required.

Name and Shape

Operating manual

Operating manual
(CD-ROM)

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.

To increase pressure resistance, the hose material and base
size were changed. (R32/R410A)

A conventional vacuum pump can be used by installing a
vacuum pump adapter.
(Use of a vacuum pump with a series motor is prohibited.)

Special gas leakage detector for HFC refrigerant R410A or
R32.

WARNING

CAUTION

WARNING

Q’ty

1

1

Name and Shape

Cable tie (large)

Cable tie (medium)

Q’ty

4

3

Coupler heat insulation (large)

Coupler heat insulation(small)

Insulation
(for electrical wiring)

The following items are necessary to install this air conditioner. (The items are not includ­ed with the air conditioner and must be purchased separately.)

Hose band

1

Drain hose insulation B

1

2

1

1

Additional materials

Connection pipe assembly Wall cap
Connection cable (4-conductor)
Wall pipe Drain hose
Decorative tape Tapping screws
Vinyl tape Putty

Saddle

2.3. Pipe requirement

Model

07, 09, 12,14 Ø 9.52 (0.80) Ø 6.35 (0.80)

Refer to the installation manual for the outdoor unit for description of allowable pipe
length and height difference.

• Use pipe with water-resistant heat insulation.

• 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 specifi ed above, may cause a condensation
on the surface of the insulation.

• Use heat insulation with thermal conductivity of 0.045 W/(

Gas pipe size (thickness) [mm] Luquid pipe size (thickness) [mm]

18

Ø 12.70 (0.80) Ø 6.35 (0.80)

CAUTION

CAUTION

m•K

) or less, at 20 °C.

2.4. Electrical requirement

The indoor unit is powered from the outdoor unit. Do not power indoor unit from separate
power source.

WARNING

Standard for electrical wiring and equipment differs in each country or region. Before you
start electrical working, confi rm related regulations, codes, or standards.

2

Cable

Connection cable

Cable Length: Limit voltage drop to less than 2%. Increase cable gauge if voltage drop is

Conductor size [

1.5 (Min) Type 60245 IEC 57

2% or more.

mm

] Type

Remarks

3 cable + Earth (Ground),

1 Ø 230 V

Installation manual
(This manual)

Installation template

Washer

En-4

Filter (large)
[18 model]

1

Filter (small)
[07, 09,12,14 model]

1

Drain hose

8

2

2

1

2.5. Optional parts

3.2. Installation dimensions

Refer to each installation manual for the method of installing optional parts.

Parts name Model No. Application

UTY-RNRZ

Wired remote controller

Simple remote controller

IR receiver unit UTY-LBTM For the wireless remote controller
Remote sensor unit UTY-XSZX Room temperature sensor

Auto louver grille kit

External connect kit

W-LAN interface UTY-TFSXZ1 For wireless LAN control

UTY-RLR
UTY-RVNM
UTY-RNNM

UTY-RSR

UTY-RHR

UTY-RSNM

UTD-GXTA-W

UTD-GXTB-W

PCB terminal For control input port

UTY-XWZXZG For control output port



For air conditioner operation
(2-wired type)



For air conditioner operation
(3-wired type)



For air conditioner operation
(2-wired type)



For air conditioner operation
(3-wired type)

Air outlet grille with outo louver
(07, 09,12,14 models)

Air outlet grille with outo louver
(18 model)

3. INSTALLATION WORK

WARNING

Do not move the appliance by holding the indoor unit pipes.
(The stress applied to the pipe joints may cause the fl ammable gas to leak during
operation.)

3.1. Selecting an installation location

Especially, the installation place is very important for the split type air conditioner because it
is very diffi cult to move from place to place after the fi rst installation.

Provide a Service access for inspection purposes.
Do not place any wiring or illumination in the service space, as they will impede service.

Strong and durable ceiling

Indoor unit

Left
side

150 mm
or more

400 mm
or more

Right
side

300 mm or more

20 mm or more

240 mm or more

20 mm or more

Service access Ceiling

(When no ceiling)

2500 mm or more

Floor

Adjust the wind direction in the room depending on the shape of blow out opening.

Service access

WARNING

Select installation locations that can properly support the weight of the indoor. Install
the units securely so that they do not topple or fall.

CAUTION

• 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 fi lled 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 water.

- 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 fi bers or
fl ammable dust, or volatile in fl ammables such as paint thinner or gasoline.

- If gas leaks and settles around the unit, it can cause a fi re.

- 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.

• Decide the mounting position with the customer as follows:

(1) Install the indoor unit in a location having suffi cient strength to support the weight of

the indoor unit.

(2) The inlet and outlet ports should not be obstructed; the air should be able to blow all

over the room.

(3) Leave the space required to service the air conditioner.

(4) Locate where the air can be distributed evenly throughout the room by the unit.

(5) Install the unit where connection to the outdoor unit is easy.

(6) Install the unit where the connection pipe can be easily installed.

(7) Install the unit where the drain pipe can be easily installed.

(8) Install the unit where noise and vibration is not amplifi ed.

(9) Take servicing, etc., into consideration and leave the spaces. Also install the unit

where the fi lter can be removed.

Unit

Control
box

300 mm

or more

100 mm

or more

400 mm
or more

Service space

3.3. Installing the unit

WARNING

• Install the air conditioner in a location which can withstand a load do at least 5 times
the weight of the main unit and which will not amplify sound or vibration. If the instal­lation location is not strong enough, the indoor unit may fall and cause injuries.

• If the work is done with the panel frame only, there is a risk that the unit will come
loose. Please take care.

3.3.1. Unit installation example

■Connect the locally purchased duct:

(1) Inlet side

• Connect the duct to the locally purchased inlet fl ange.

• Connect the fl ange to the body with the locally purchased tapping screws.

• Wind the inlet fl ange connecting to the duct with the aluminum tape etc. to avoid the
air discharge.

CAUTION

When the duct is connected to inlet side, remove contained fi lter and surely attach
locally purchased fi lter at inlet opening.

(2) Outlet side

• Connect the duct with adjusting inside of outlet fl ange.

• Wind the outlet fl ange connecting to the duct with the aluminum tape etc. to avoid the
air discharge.

• Insulate the duct to avoid the dew condensation.

En-5

CAUTION

• Check that duct work does not exceed the range of external static pressure of equip­ment.

• Make sure to insulate ducts to avoid the dew condensation.

• Make sure to insulate between ducts and walls if metal ducts are used.

• Please explain handling and washing methods of locally purchased materials to the
customer.

• To prevent people from touching the parts inside the unit, be sure to install grilles on
the inlet and outlet ports. The grilles must be designed in such a way that cannot be
removed without tools.

• When connecting the duct to the outlet port of the indoor unit, be sure to insulate the
outlet port and the installation screws to prevent water from leaking around the port.

• Set the static pressure outside the unit to 90 Pa or less (the allowable range is be­tween 0 and 90 Pa.)

■Replace the cover as follows:

• Remove the screws, and then remove cover and fan guard.

• Install the cover with the screws as shown in the illustration below.
Model Screw

07, 09, 12, 14 9

18 11

Screw

Cover

Fan guard

Outlet side

Inlet side

A 650 mm 850 mm
B P200×2=400 mm P200×3=600 mm

07, 09, 12,14 models 18 model

CAUTION

• Be sure to install the air inlet grille and the air outlet grille for air circulation. The cor­rect temperature cannot be detected.

• Grills must be fi xed so that man cannot touch indoor unit fan and exchanger, and
cannot be removed by only hand operation without tool.

• Be sure to install the air fi lter in the air inlet.

If the air fi lter is not installed, the heat exchanger may be clogged and its perfor-

mance may decrease.

3.3.2. Install the fi lters

• Install the fi lters to the unit.

Side inlet - Side outlet

Insulation material (Locally purchased)

Aluminum tape

Flange (Locally purchased)

Air

Duct
(Locally purchased)

Side inlet - Side outlet (Duct)

Insulation material (Locally purchased)

Aluminum tape

Flange (Locally purchased)

Air

Duct
(Locally purchased)

Bottom inlet - Side outlet

Duct (Locally purchased)

Intake grille
(Locally
purchased)

(Locally purchased)

Intake grille

Air

Flange (Locally purchased)

Aluminum tape

Tapping screw for
fl ange connection

(M4 x 10mm /

Air

purchased)

Locally

Filter (accessories)

Unit

Filter

3.3.3. Position the ceiling hole and hanging bolts

• Using the installation template, drill holes for bolts (4 holes).

Installation template
(accessory)

Air

Drilling position
for bolts

Air

Intake grille (Locally purchased)

En-6

377 mm

A

Air

A 734 mm 934 mm

07, 09, 12, 14 models 18 model

3.3.4. Fix the unit

(1) Hang the unit

Nut A
(Locally purchased)

Washer
(accessories)

Nut B
(Locally purchased)

Hanger bolt

Hanger bolt

Hanger

3.4. Drain installation

3.4.1. Installing drain pipes

WARNING

• Do not insert the drain piping into the sewer where sulfurous gas occurs. (Heat ex­change erosion may occur)

• Insulate the parts properly so that water will not drip from the connection parts.

• Check for proper drainage after the construction by using the visible portion of trans­parent drain port and the drain piping fi nal outlet on the body.

CAUTION

Do not apply adhesive agent on the drain port of the body.

(Use the attached drain hose and connect the drain piping)

Nut A

Hanger

(Locally purchased)

Washer
(accessories)

Unit

Nut B
(Locally purchased)

20mm
length

Cover

* It might become diffi cult to open and shut the Cover /control box cover when the length

exceeds 20mm.

(2) Leveling

Base horizontal direction leveling on top of the unit.

Ceiling

Level

■When drain pump is used

• Use general hard polyvinyl chloride pipe (VP25) [outside diameter 32 mm].

• Do not perform a rise, trap and air bleeding.

• Provide a downward gradient (1/100 or more).

• Provide supporters when long pipes are installed.

• Use an insulation material as needed, to prevent the pipes from freezing.

• Install the pipes in a way that allows for the removal of the control box.

GOOD

Locally arranged pipe

Max. 300 mm

Gap of 1.5 to 2 m

Supporter

VP25 [O.D
32 mm or more]

700 mm or
less

Horizontal or
upward gradient

PROHIBITED

Air bleeding

Trap

Rise

OK

PROHIBITED

10 mm or less

Level

Air

OK PROHIBITED

10 mm or less

CAUTION

• Leave a space of 100 mm or more between the inlet port and the ceiling.

• Fasten the unit securely with Special nuts A and B.

Observe the following procedures to construct centralized drain pipe fi ttings.

VP30 or more [O.D 38 mm or more]

Downward gradient 1/100 or more

700 mm or less

■When drain pump is not used (natural drainage)

CAUTION

Set “Drainage function setting (DIP switch 101-1)” in “5.3. DIP switch 101 setting”

If the drain pump is not used, please replace with the drain cap.

• Use general hard polyvinyl chloride pipe (VP25) [outside diameter 32 mm].

• Do not perform a rise, trap and air bleeding.

En-7

• Provide a downward gradient (1/100 or more).

• Provide supporters when long pipes are installed.

• Use an insulation material as needed, to prevent the pipes from freezing.

• Install the pipes in a way that allows for the removal of the control box.

GOOD

D

ownward gradient

Gap of 1.5 to 2 m

2.5-5.0 mm

(2) Be sure to connect Drain pipe with adhesive (polyvinyl chloride) so that there is no

leakage.

Applying
area of
adhesive

Joint pipe
(Locally purchased)

Drain pipe (VP25)
(Locally purchased)

Supporter

100 mm or more

VP25 [O.D 32 mm
or more]

PROHIBITED

Locally arranged pipe

Air bleeding

Trap

Rise

Observe the following procedures to construct centralized drain pipe fi ttings.

VP30 or more
[O.D 38 mm or more]

Downward gradient
1/100 or more

3.4.2. Installing the drain hose (accsessory) and drain pipe (locally purchased)

(1) Be sure to use supplied Drain hose and Hose band

Hose band (accessory)

Drain hose (accessory)

4 mm or less

CAUTION

Do not connect to the Drain hole with adhesive. Using adhesive may cause damage
and water leaks.

(3) After installing the Drain hose, check if the drainage is smooth.

CAUTION

To prevent excessive force on Drain hose, avoid bends or twists. (To bend or twist
may cause water leaks.)

(4) After checking for drainage, attach the Drain hose insulation B to insulate, following

the instructions as in the fi gures.
To avoid space with Drain hose and Hose band, press fi rmly the Drain hose insulation B.

Ensure there is
no space.

• STEP 1 to STEP 3

Butt the insulation
against the unit.

Drain hose
insulation B
(accessory)

Unit

Slit

Drain
hole

Hard PVC side

Hose band

4 mm or less

20 mm

Drain hose

Hose band

Fasten the Hose band at the position where
horizontal against ground.
The Hose band must be positioned at the right
side of the Drain hose as in the fi gure.

Press fi rmly

Press fi rmly

Roll the
insulation
over the joint.

STEP 1

Press fi rmly

Slit

Press fi rmly

STEP 2

Slit

Press fi rmly

STEP 3

En-8

• FINISH
Check that there is no gap between the unit and the drain hose insulation.

• When drain pump is used.

• When drain pump is not used. (Natural drainage)

Do not cover the
panel window.

When using conventional fl are tools to fl are R32 pipes, the dimension A should be approx-
imately 0.5 mm more than indicated in the table (for fl aring with R32 fl are tools) to achieve
the specifi ed fl aring. Use a thickness gauge to measure the dimension A.

Width across

flats

NOTES: The fl are nut specifi cation is compliant with ISO14903.

Pipe outside diameter [mm (in.)]

6.35 (1/4) 17

9.52 (3/8) 22

12.70 (1/2) 26

15.88 (5/8) 29

19.05 (3/4) 36

Width across flats of Flare

nut [mm]

■Bending pipes

Do not cover the
control box cover.

NOTES: Check for drainage

Pour about 1 liter of water from the position shown in the diagram or from the airfl ow
outlet to the dew tray. Check for any abnormalities such as strange noises and whether
the drain pump functions normally.

CAUTION

Make sure the drain water is properly drained.

3.5. Pipe installation

3.5.1. Pipe connection

CAUTION

Tighten the flare nuts with a torque wrench using the specified tightening method.
Otherwise, the fl are nuts could break after a prolonged period, causing refrigerant to leak
and generate hazardous gas if the refrigerant comes into contact with a fl ame.

■Flaring

Use special pipe cutter and fl are 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 fl are nut (always use the fl are nut attached to the indoor unit(s) and outdoor

unit or branch box respectively) onto the pipe and perform the fl are processing with a
fl are tool. Use the special R410A or R32 fl are tool, or the conventional fl are tool. Leak-
age of refrigerant may result if other fl are 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

B

Die

A

Pipe

and is not cracked or scratched.

L

CAUTION

• 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 diffi cult
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.

Insulating
pipe

Pipe

Cutter

Cut line

■Flare connection

CAUTION

• Be sure to install the pipe against the port on the indoor unit correctly. If the center-

ing is improper, the fl are nut cannot be tightened smoothly. If the fl are nut is forced
to turn, the threads will be damaged.

• Do not remove the fl are nut from the indoor unit pipe until immediately before con-

necting the connection pipe.

• Hold the torque wrench at its grip, keeping it in the right angle with the pipe, in order

to tighten the fl are nut correctly.

• Tighten the fl are nuts with a torque wrench using the specifi ed tightening method.

Otherwise, the fl are nuts could break after a prolonged period, causing refrigerant to
leak and generate hazardous gas if the refrigerant comes into contact with a fl ame.

• Connect the piping so that the control box cover can easily be removed for servic-

ing when necessary.

• In order to prevent water from leaking into the control box, make sure that the pip-

ing 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. (Refer to the following table for the flare nut
tightening torques.)

Tighten with 2 wrenches.

Holding wrench

Torque wrench

Indoor unit pipe
(Body side)

Flare nut [mm (in.)] Tightening torque [N·m (kgf·cm)]

6.35 (1/4) dia. 16 to 18 (160 to 180)

9.52 (3/8) dia. 32 to 42 (320 to 420)

12.70 (1/2) dia. 49 to 61 (490 to 610)

15.88 (5/8) dia. 63 to 75 (630 to 750)

19.05 (3/4) dia. 90 to 110 (900 to 1,100)

Do not remove the cap from the connection pipe before connecting the pipe.

Flare nut

Connection pipe

Pipe outside diameter

[mm (in.)]

6.35 (1/4)

9.52 (3/8) 13.2

12.70 (1/2) 16.6

15.88 (5/8) 19.7

19.05 (3/4) 24.0

Dimension A [mm]

Flare tool for R32, clutch

type

0 to 0.5

Dimension B [mm]

9.1

En-9

3.6. Electrical wiring

WARNING

• Electrical work must be performed in accordance with this Manual by a person certifi ed
under the national or regional regulations. Be sure to use a dedicated circuit for the
unit. An insuffi cient power supply circuit or improperly performed electrical work can
cause serious accidents such as electric shock or fi re.

• Before starting work, check that power is not being supplied to the indoor unit and
outdoor unit.

• For wiring, use the prescribed type of cables, connect them securely, making sure
that there are no external forces of the cables applied to the terminal connections.
Improperly connected or secured cables can cause serious accidents such as over­heating the terminals, electric shock, or fi re.

• Securely install the electrical box cover on the unit. An improperly installed electrical
box cover can cause serious accidents such as electric shock or fi re through exposure
to dust or water.

• Install sleeves into any holes made in the walls for wiring. Otherwise, a short circuit
could result.

• Use the included connection cables and power cables or ones specifi ed by the
manufacturer. Improper connections, insuffi cient insulation, or exceeding the allowable
current can cause electric shock or fi re.

• Do not modify the power cables, use extension cables, or use any branches in the
wiring. Improper connections, insuffi cient insulation, or exceeding the allowable current
can cause electric shock or fi re.

• Match the terminal block numbers and connection cable colors with those of the
outdoor unit or branch box. Erroneous wiring may cause burning of the electric parts.

• Securely connect the connection cables to the terminal board. In addition, secure the
cables with wiring holders. Improper connections, either in the wiring or at the ends
of the wiring, can cause a malfunction, electric shock, or fi re.

• Always fasten the outside covering of the connection cable with the cable clamp. (If
the insulator is chafed, electric leakage may occur.)

• Install an earth leakage breaker. In addition, install the earth leakage breaker so
that the entire AC main power supply is cut off at the same time. Otherwise, electric
shock or fi re could result.

• Always connect the earth (ground) cable. Improper earthing (grounding) work can
cause electric shocks.

• Perform wiring work in accordance with standards so that the air conditioner can be
operated safely and positively.

• Connect the connection cable fi rmly to the terminal board. Imperfect installation may
cause a fi re.

• Use ring terminals and tighten the terminal screws to the specifi ed torques, otherwise,
abnormal overheating may be produced and possibly cause heavy damage inside
the unit.

CAUTION

• Be careful not to generate a spark as follows for using a fl ammable 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.

• Earth (Ground) the unit. Do not connect the earth (ground) cable to a gas pipe, water
pipe, lightning rod, or a telephone earth (ground) cable. Improper earthing (ground­ing) may cause electric shock.

• Install the remote controller cables so as not to be direct touched with your hand.

• Do not connect power supply cables to the transmission or remote controller termi­nals, as this will damage the product.

• Never bundle the power supply cable and transmission cable, remote controller
cable together. Separate these cable by 50 mm or more. Bundling these cables
together will cause miss operation or breakdown.

• When handling PCB, static electricity charged in the body may cause malfunction of
the PCB. Follow the cautions below:

- Establish an earth (a ground) for the indoor and outdoor units and peripheral
devices.

- Cut power (breaker) off.

- Touch metal part of the indoor and outdoor units for more than 10 seconds to
discharge static electricity charged in the body.

- Do not touch terminals of parts and patterns implemented on PCB.

• Be sure to refer to the above diagram for do correct fi eld wiring. Wrong wiring causes
malfunction of the unit.

• Check local electrical rules and also any specifi c wiring instructions or limitation.

3.6.1. Wiring system diagram

■Standard pair

Connection cable

Indoor unit

Wired remote controller cable
2-wire type

Indoor unit

Earth (Ground) line

Y1
Y2

Power line

Control line

Red

White

Outdoor unit

Wired remote controller

R

W

Y3

1
2

3-wire type

Indoor unit

Y1
Y2
Y3

1
2

*Earth (Ground) the remote controller if it has a earth (ground) line.

■Flexible multi

Connection cable

Indoor unit Outdoor unit

Indoor unit

Wired remote controller cable

2-wire type

Indoor unit

3-wire type

Indoor unit

Remote
controller cable

Red

White

Black

Remote
controller cable

Earth (Ground) line

Power line

Control line

Red
White

Remote controller cable

Wired remote controller

R

W

B

UNIT A

UNIT B

Wired remote controller

Wired remote controller

En-10

Red
White
Black

Remote controller cable

*Earth (Ground) the remote controller if it has a earth ground) line.

■Simultaneous twin (18 model only)

Connection cable

Indoor unit

(Primary)

Junction box (Locally purchased)

Earth (Ground) line

Outdoor unit

■Simultaneous triple (18 model only)

Connection cable

Indoor unit

(Primary)

Junction box (Locally purchased)

Earth (Ground) line

Outdoor unit

Indoor unit

(Secondary)

Wired remote controller cable
3-wire type only

Indoor unit

(Primary)

Red
White
Black

Remote controller cable

Indoor unit

(Secondary)

*Earth (Ground) the remote controller if it has a earth (ground) line.

• Connect the remote controller wires to the primary unit.

Bus wire (Locally purchased,
remote controller cable)
Max length: 500 m

Earth (Ground) line

Control line

Power line

Wired remote controller

Indoor unit

(Secondary)

Indoor unit

(Secondary)

Wired remote controller cable
3-wire type only

Indoor unit

(Primary)

Indoor unit

(Secondary)

Earth (Ground) line

Control line

Power line

Wired remote controller

Red
White

Black

Remote controller cable

Bus wire (Locally purchased,
remote controller cable)
Max length: 500 m

Indoor unit

(Secondary)

*Earth (Ground) the remote controller if it has a earth (ground) line.

• Connect the remote controller wires to the primary unit.
Wired remote controller is recommended using simultaneous twin or triple connection.

En-11

3.6.2. Connection cable preparation

■Connection cable

Keep the earth (ground) wire longer than the other wires.

20 mm

Earth (Ground)
wire

30mm or more

• Use a 4-core wire cable.

■Remote controller cable

For 2-wire type

30 mm 30 mm

For 3-wire type

Connection cable

■Connection cable

■Remote controller cable

Earth (ground)

DIP switch

12 3

Outdoor
unit

Control line

Power line

Connection cable
(power supply)

Print circuit board

(PCB)

3.6.3. How to connect wiring to the terminals

■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 fi gure 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

Ring terminal

Sleeve

(3) Connect specifi ed 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

Wire

Ring terminal

Screw with special washer

Ring terminal

Terminal blocks

Wire
(6) Refer to the table for the terminal screw tightening torques.
(7) Please do not fi x 2 power supply cables with 1 screw.

Tightening torque [N·m (kgf·cm)]

M4 screw 1.2 to 1.8 (12 to 18)

3.6.4. Connection wiring

CAUTION

• Be careful not to mistake the power supply cable and connection wires when install­ing.

• Install so that the wires for the remote controller will not come in contact with other
connection wires.

(1) Remove the control box cover
(2) Connect the connection cable.

Cover

3-wire type

Y1 Y2

Y3 1 2 Y1 Y2

TO REMOTE CONTROL UNIT Ex IN

Black

White

2-wire type

Y3 1 2

TO REMOTE CONTROL UNIT Ex IN

White

Red

Red

EarthEarth

Remote controller

Remote
controller
cable

Factory setting “2 WIRE”

Remote controller

Connecting the
Optional parts

Remote
controller
cable

Set to “3 WIRE”

*Earth (Ground) the remote controller if it has a earth (ground) wire.

NOTES: Be sure to change the DIP SW to the corresponding remote controller.

When a 2-wire remote controller is connected to a “3WIRE” setting, power will

not be supplied.

When a 3-wire remote controller is connected to a “2WIRE” setting, a

communication error will be detected.

(3) After wiring is complete, secure the remote controller cable, connection cable with

the cable clamps.

Y3 1 2

Y1 Y2

TO REMOTE CONTROL UNIT Ex IN

Remote controller
cable

Connection cable

12 3

(power supply)

Cable clamp

En-12

Screw

Connection cable
(power supply)

Avoid touching the ceiling
with the wiring

Ceiling

Do not bind the power supply cable and other cables together.

Cable tie
(medium, accessories)

Avoid covering the air
inlet with the wiring.

(4) Seal the cable outlet or other gaps with putty to prevent dew condensation or insect

from entering the electric control box.

(5) Replace the control box cover.

CAUTION

Do not bundle the remote controller cable, or wire the remote controller cable in par­allel, with the indoor unit connection wire (to the outdoor unit) and the power supply
cable. It may cause erroneous operation.

Ter min al

Y1 Y2

Y3 1 2

TO REMOTE CONTROL UNIT Ex IN

3.7. Remote controller setting

To install and set the remote controller, refer to the installation manual of the remote
controller.

4. OPTIONAL INSTALLATION WORK

4.1. Optional kit installation

WARNING

Regulation of cable differs from each locality, refer in accordance with local rules.

CN65

CN11

Y3 1 2

Y1 Y2

TO REMOTE CONTROL UNIT Ex IN

12 3

This air conditioner can be connected with the following optional kits.
For details on how to install optional parts, refer to the installation manual included in each
item.

Connector No. Option type

CN47*1 Connect wire (UTY-XWZXZG)

CN8 Remote sensor (UTY-XSZX)
CN48 IR Receiver (UTY-LBTM)
CN11 Auto louver grille (UTD-GXT-W)

CN65*2 Other optional parts

*1: For external output terminal setting, refer to Function No.60 in “6. FUNCTION SET-

TING”.

*2: Other options (WLAN adapter, converters, etc.) may be connectable. Please refer to

the technical data for details.

NOTES:

Options connecting to CN65 cannot be used at the same time.

4.2. External input and output

4.2.1. External input

• Indoor unit functions such as Operation/Stop or Forced stop can be done by using
indoor unit terminals.

• “Operation/Stop” mode or “Forced stop” mode can be selected with function setting of
indoor unit.

•

A twisted pair cable (22 AWG) should be used. Maximum length of cable is 150 m (492 ft.).

• Use an external input and output cable with appropriate external dimension, depending
on the number of cables to be installed.

• The wire connection should be separate from the power cable line.

CN47

CN48

CN8

Connected device

● Dry contact terminal

When a power supply is unnecessary at the input device you want to connect, use the Dry
contact terminal.

*1

Connected device

*1: The switch can be used on the following condition: DC 12 V to 24 V, 1 mA to 15 mA.

Ter minal
(External in)

■Operation behavior

● Input signal type

ON

Edge

OFF

When function setting is “Operation/Stop” mode 1.

Input signal Command

OFF → ON Operation
ON → OFF Stop

When function setting is “Forced stop” mode.

Input signal Command

OFF → ON Forced stop
ON → OFF Normal

* When the forced stop is triggered, indoor unit stops and Operation/Stop operation by a

remote controller is restricted.

When function setting is “Operation/Stop” mode 2.

Input signal Command

OFF → ON Operation
ON → OFF Stop (R.C. disabled)

4.2.2. External output

• A twisted pair cable (22AWG) should be used. Maximum length of cable is 25 m (82 ft.).

• Use an external input and output cable with appropriate external dimension, depending
on the number of cables to be installed.

• Output voltage: Hi DC12V±2V, Lo 0V.

• Permissible current: 50mA

■Output select

When interlocking with external device

Connected

device

Relay (locally purchased)

PCB

CN47

or

When displaying “Operation/Stop”

Resistor

LED

PCB

CN47

Connected device

En-13

■Operation behavior

*If function setting “60” is set to “00”

Function setting Status Output voltage

00

09

60

10

11

Stop 0V

Operation DC 12 V

Normal 0V

Error DC 12 V

Indoor unit fan stop 0V

Indoor unit fan operation DC 12 V

External heater OFF 0 V

External heater ON DC 12V

4.2.3. Connection methods

■Wire modifi cation

• Remove insulation from wire attached to wire kit connector.

• Remove insulation from locally purchased cable. Use crimp type insulated butt
connector to join fi eld cable and wire kit wire.

• Connect the wire with connecting wire with solder.

IMPORTANT:

Be sure to insulate the connection between the wires.

Locally purchased

Option parts
External output wire

Solder and insulate the connected parts.

• Connecting wires to the terminals.

Use ring terminals with insulating sleeves to connect to the terminal block.

• Connection terminals and wiring arrangement (Refer to “4.6. Other optional parts”)

4.3. Remote sensor (Optional parts)

4.3.1. Connection method

• Remove the existing connector and replace it with the remote sensor connector (ensure
that the correct connector is used).

• The original connector should be insulated to ensure that it does not come into contact
with other electrical circuitry.

• Connection terminals and wiring arrangement. (Refer to “4.6. Other optional parts”)

4.3.2. Setting for room temperature correction

When a remote sensor is connected, set the function setting of indoor unit as indicated
below.

• Function Number “30”:

Set the Setting Number to “00”. (Default)

• Function Number “31”:

Set the Setting Number to “02”.

* Refer to “6. FUNCTION SETTING” for details about Function number and Setting

value

4.4. IR receiver unit (Optional parts)

• For the installation method, please refer to the installation manual of IR receiver unit.

4.4.1. Connection method

• Use 7 pins for receiver unit cable.

• At fi rst, connect the receiver unit cable to the controller PCB.

• Attach the core that comes between controller PCB and the clamp.

• Connection terminals and wiring arrangement. (Refer to “4.6. Other optional parts”).

4.5. Auto louver grille (Optional parts)

4.5.1. Connection method

• Wiring arrangement

Controller PCB

Y3 1 2

Y1 Y2

TO REMOTE CONTROL UNIT Ex IN

CN11

DIP SW 101
( " 2 " : ON)

CAUTION



To protect the cable insulation after opening a knockout hole, remove any burrs from
the edge of the hole.

12 3

(c) Block gaps with insulation

(a) Opening this

knockout hole

Auto louver grille cable

(accessories)

(b) Bushing

(accessories of
optional parts)

Cable tie
(medium, accessories)

4.6. Other optional parts

4.6.1. Connection method

• Connection terminals and wiring arrangement

In following fi gure, all the possible connections are done for description.
In actual installation, connections will differ according to each installation requirements.

Controller PCB

CN65

CN47

CN48

Y3 1 2

Y1 Y2

TO REMOTE CONTROL UNIT Ex IN

External output

External input

En-14

CN8

Core

12 3

4.7. Optional parts cable binding

Bushing**

Insulation

Other optional parts cables

(2) Set the R.C. address (DIP switch setting)
Set the R.C. address of each indoor unit using the DIP switch on the indoor unit

circuit board.

Air inlet

Remote controller
cable

Cable tie

(medium,

accessories)

Auto louver grille cable

Power supply cable

Avoid touching the ceiling with the wirings.

* Use an accessory of indoor unit or optional parts for cable tie.
** Use an accessory of optional parts for bushing.

• Do not bind the power supply cable and other cables together.

Avoid covering the air

inlet with the wirings.

Ceiling

CAUTION

To protect the cable insulation after opening a knockout hole, remove any burrs from
the edge of the hole.

5. REMOTE CONTROL INSTALLATION

5.1. Group control

NOTES: Group control cannot be used together with W-LAN adapter.

A number of indoor units can be operated at the same time using a single remote controller.
*When different types of indoor units (such as wall mounted type and cassette type, cas-

sette type and duct type, or other combinations) are connected using group control sys­tem, some functions may no longer be available.

(1) Connect up to 16 indoor units in a system.

I.U. I.U. I.U. I.U.

Y3 1 2

Y1 Y2

TO REMOTE CONTROL UNIT Ex IN

12 3

SW100

(a) 2-wire type

DIP switch (RC AD SW)...Factory setting “00”
Since the remote controller address settings are automatically confi gured, you do not
need to confi gure them.
If confi guring manually, it is necessary to confi gure both the indoor unit and the remote
controller. For details, please refer to the remote controller installation manual.

(b) 3-wire type

DIP switch (RC AD SW)...Factory setting “00”

When connecting multiple indoor units to 1 standard wired remote controller, set the

address at RC AD SW in sequence from “00”.

Setting

Remote controller
address

Example

If 4 indoor units are connected.

Indoor unit 1

RC AD SW

00

Setting

range

00 to 15

Indoor unit 2 Indoor unit 3 Indoor unit 4

RC AD SW

01

Setting
example 00

RC AD SW

02

Switch 100

ON

1234

RC AD

RC AD SW

03

BCDE

A

Remote
controller

A, B, C, D, E : Remote controller cable.
A+B+C+D+E ≤ 500 m.

Example of wiring method (2-wire type)

Indoor unit 1 Indoor unit 2 Indoor unit 3 Indoor unit 4

123 123 123 123

123

Y

1 Y2

Remote controller

Remote con­troller cable

Remote controller cable

Remote
controller

Set the R.C. address in accordance with the table below.

Indoor unit

NOTES:

Be sure to set consecutive R.C. address.
The indoor units cannot be operated if a number is skipped.

R.C. address

1 00 OFF OFF OFF OFF
2 01 ON OFF OFF OFF
3 02 OFF ON OFF OFF
4 03 ON ON OFF OFF
5 04 OFF OFF ON OFF
6 05 ON OFF ON OFF
7 06 OFF ON ON OFF
8 07 ON ON ON OFF

9 08 OFF OFF OFF ON
10 09 ON OFF OFF ON
11 10 OFF ON OFF ON
12 11 ON ON OFF ON
13 12 OFF OFF ON ON
14 13 ON OFF ON ON
15 14 OFF ON ON ON
16 15 ON ON ON ON

1234

Outdoor
unit 1

Outdoor
unit 2

DIP SWITCH No.

Outdoor
unit 3

Outdoor
unit 4

Remote
controller

R.C. address

(DIP switch setting)

Indoor
unit 1

Indoor
unit 2

00 01 02 03

: Transmission cable, Power supply cable
: Remote controller cable

Indoor
unit 3

Indoor
unit 4

: Connection cable

En-15

■Settings when simultaneous Multi is included

(3) Set the refrigerant circuit address (Remote controller setting)

1. Turn on all of the indoor units.
* Turn on the indoor unit with the R.C. address 00 last.

(Within 1 minute)

2. Set the refrigerant circuit address.
Assign the same number to all of the indoor units connected to an outdoor unit.
(The unit is factory-set to “00”)

Refrigerant circuit address

Function

Number

Setting Value

00
01

〜

02 00 to 15
14
15

(4) Set the “primary” and “secondary” settings. (Remote controller setting)
(Set the indoor unit that is connected to the outdoor unit using a transmission cable as the

“primary”.)

Function Number

Primary

Secondary 01

After completing the function settings, turn off all of the indoor units,
and then turn them back on.
* If error code 21, 22, 24, or 27 is displayed, there may be an incorrect

setting. Perform the remote controller setting again.

51

Setting Value

00

NOTES:

• When different indoor unit models are connected using the group control system, some
functions may no longer be available.

• If the group control system contains multiple units that are operated simultaneously, con­nect and set the units as shown below.

• Auto-changeover operates under the same mode with model R.C. address 00.

• It should not be connected to any other Gr that is not of the same series (A**G only).

Standard

Outdoor
unit 1

Remote
controller

R.C. address

(DIP switch setting)

Refrigerant circuit
address setting

(Function number 02)

Primary/Secondary setting

(Function number 51)

: Transmission cable, Power supply cable
: Remote controller cable

pair

Indoor
unit 1

Standard

pair

Outdoor
unit 2

Indoor
unit 2

Simultaneous

twin

Outdoor
unit 3

Indoor

Indoor

unit 3

unit 4

Simultaneous

triple

Outdoor
unit 4

Indoor

Indoor

unit 5

unit 6

: Power supply cable
: Connection cable

Indoor
unit 7

5.2. Multiple remote control

Up to 2 remote controllers can be used to operate one indoor unit

CAUTION

Multiple installation method described above is prohibited to combine 3 Wired type
with 2 Wired Type.

I.U.

A

Primary Primary Secondary

A, B : Remote controller cable. (Refer to “2.4. Electrical requirement”)
A ≤ 500 m, A+B ≤ 500 m

•

The timer and self-diagnosis functions cannot be used on the secondary units.

(1) Wiring method (indoor unit to remote controller)

Indoor unit

Primary unit

Remote controller

(2) Remote controller DIP switch 1 setting
Set the remote controller DIP switch 1 No. 2 according to the following table.

DIP SW 1-No. 2

Primary unit

OFF

Secondary unit

ON

I.U.

AB

Remote con­troller cable

Secondary unit

5.3. DIP switch 101 setting

If contained drain pump is not used, set the drainage function to “Disable” in the drainage
function switching.

The auto louver grille setting (optional parts) can be used when the it is mounted.
For the setting method, refer to “4.5. Auto louver grille (Optional parts)”.

The fan delay setting can be used when the auxiliary heater is mounted.
When the operation is stopped when the indoor unit is operating with an auxiliary heater,
the operation continues 1 minutes.

Change the following settings by using the DIP switch.

(♦... Factory setting)

DIP switch 101

1 Disable Enable ♦ Drainage function setting
2 Enable Disable ♦ Auto louver grille setting
3 Enable Disable ♦ Fan delay setting

● Switching position

DIP SW state

ON OFF

Details

En-16

DIP SW 101

Y3 1 2

Y1 Y2

TO REMOTE CONTROL UNIT Ex IN

12 3

5.4. Simultaneous multi-system operation

CAUTION

• When setting DIP switches, do not touch any other parts on the circuit board directly
with your bare hands.

• Be sure to turn off the main power.

• Ensure to use a 3-wire type wired remote controller. (Set the DIP switch to 3-wire type.)

• When using a simultaneous multi system, a WLAN adapter cannot be used.

• If connected to an indoor unit that supports R410A, an error message is displayed. Check
the machine type of the indoor unit to connect, and ensure to use an indoor unit support­ing R32.

• By combining with an outdoor unit, 2 units for twin and 3 units for triple indoor units, can
be switched on/off simultaneously.

(1) Wiring method

• Refer to “3.6. Electrical wiring” for wiring procedure and wiring method.

• The indoor unit is connected the outdoor unit using a transmission cable is “primary”.

• Connect the remote controller wire to the primary unit.

■Twin type ( 18 model only )

Outdoor

unit

3. After completing the function settings, turn off all of the indoor units, and then turn
them back on.

* If error code 21, 22, 24 or 27 is displayed, there may be an incorrect setting.

Perform the remote controller setting again.

■Twin type ( 18 model only )

Outdoor

unit

Remote
controller

R.C. address

(DIP switch setting)

Primary/Secondary setting

(Function number 51)

Indoor
unit 1

[Primary]

Indoor
unit 2

[Secondary]

■Triple type ( 18 model only )

Outdoor

unit

Remote
controller

Indoor
unit 1

[Primary]

Indoor
unit 2

[Secondary]

■Triple type ( 18 model only )

Outdoor

unit

Remote
controller

: Transmission cable, Power supply cable

(2) Set the R.C. address (DIP switch setting )

Set the R.C. address of each indoor unit using the DIP switches on the indoor unit
circuit board. (Refer to the following table and fi gure.)
The DIP switches are normally set to make the R.C. address 00.

Indoor
unit 1

[Primary]

Indoor
unit 2

[Secondary]

Indoor
unit 3

[Secondary]

: Power supply cable
: connection cable: Remote controller cable

Indoor unit R.C. address DIP SWITCH No.

1234

1 00 OFF OFF OFF OFF

2 01 ON OFF OFF OFF

3 02 OFF ON OFF OFF

Y3 1 2

Y1 Y2

TO REMOTE CONTROL UNIT Ex IN

12 3

Be sure to set the R.C. address sequentially.

NOTES:

(3) Set the primary and secondary (Remote controller setting)

1. Turn on all of the indoor units.

2. Set the “primary” and “secondary” settings.
(Set the indoor unit that is connected to the outdoor unit using a transmission cable
as the “primary”.)

Function Number

Primary

Secondary 01

51

SW100

Setting Value

00

Remote
controller

R.C. address

(DIP switch setting)

Primary/Secondary setting

(Function number 51)

: Transmission cable, Power supply cable
: Remote controller cable

Indoor
unit 1

[Primary]

Indoor
unit 2

[Secondary]

Indoor
unit 3

[Secondary]

: Power supply cable
: Connection cable

6. FUNCTION SETTING

6.1. Function details

■Filter sign

Select appropriate intervals for displaying the fi lter 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).

Function

number

11

Setting

value

00 Standard (400 hours)
01 Long interval (1000 hours)
02 Short interval (200 hours)
03 No indication ♦

Setting description

■Static pressure

Select appropriate static pressure according to the installation conditions.

Function

number

26

Range of static pressure is different from 1 model to other.

Range of static pressure 0 to 90 Pa

Setting

value

00 0 Pa

01 10 Pa

02 20 Pa

03 30 Pa

04 40 Pa

05 50 Pa

06 60 Pa

07 70 Pa

08 80 Pa

09 90 Pa

31 ♦ 25 Pa [Standard]

Setting description

(♦... Factory setting)

(♦... Factory setting

)

En-17

■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).

Function number

30

(For cooling)31(For heating)

Setting

value

00 Standard setting ♦
01 No correction 0.0 °C (0 °F)
02 -0.5 °C (-1 °F)
03 -1.0 °C (-2 °F)
04 -1.5 °C (-3 °F)
05 -2.0 °C (-4 °F)
06 -2.5 °C (-5 °F)
07 -3.0 °C (-6 °F)
08 -3.5 °C (-7 °F)
09 -4.0 °C (-8 °F)
10 +0.5 °C (+1 °F)
11 +1.0 °C (+2 °F)
12 +1.5 °C (+3 °F)
13 +2.0 °C (+4 °F)
14 +2.5 °C (+5 °F)
15 +3.0 °C (+6 °F)
16 +3.5 °C (+7 °F)
17 +4.0 °C (+8 °F)

Setting description

(♦... Factory setting)

More

Cooling

Less

Heating

Less

Cooling

More

Heating

■Room temperature control for wired remote controller sensor

Depending on the installed environment, correction of the wire remote temperature sensor
may be required.
Select the appropriate control setting according to the installed environment.
To change this setting, set Function 42 to “Both” (01).
Ensure that the Thermo Sensor icon is displayed on the remote controller screen.

Function number

35

(For cooling)36(For heating)

Setting

value

00 No correction ♦
01 No correction 0.0 °C (0 °F)
02 -0.5 °C (-1 °F)
03 -1.0 °C (-2 °F)
04 -1.5 °C (-3 °F)
05 -2.0 °C (-4 °F)
06 -2.5 °C (-5 °F)
07 -3.0 °C (-6 °F)
08 -3.5 °C (-7 °F)
09 -4.0 °C (-8 °F)
10 +0.5 °C (+1 °F)
11 +1.0 °C (+2 °F)
12 +1.5 °C (+3 °F)
13 +2.0 °C (+4 °F)
14 +2.5 °C (+5 °F)
15 +3.0 °C (+6 °F)
16 +3.5 °C (+7 °F)
17 +4.0 °C (+8 °F)

Setting description

(♦... Factory setting)

More

Cooling

Less

Heating

Less

Cooling

More

Heating

■Auto restart

Enable or disable automatic restart after a power interruption.

Function

number

40

* 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.

Setting

value

00 Enable ♦

01 Disable

Setting description

(♦... Factory setting)

■Room temperature sensor switching

(Only for wireless remote controller)
When using the Wired remote controller temperature sensor, change the setting to “Both” (01).

Function

number

42

00: Sensor on the indoor unit is active.
01: Sensors on both indoor unit and wired remote controller are active.
*

Remote controller sensor must be turned on by using the remote controller

Setting

value

00 Indoor unit ♦

01 Both

Setting description

(♦... Factory setting)

En-18

■Remote controller custom code

(Only for wireless remote controller)
The indoor unit custom code can be changed. Select the appropriate custom code.

Function

number

44

Setting

value

00 A ♦
01 B
02 C
03 D

Setting description

(♦... Factory setting)

■External input control

“Operation/Stop” mode or “Forced stop” mode can be selected.

Function

number

46

Setting

value

00 Operation/Stop mode 1 ♦
01 (Setting prohibited)
02 Forced stop mode
03 Operation/Stop mode 2

Setting description

(♦... Factory setting)

■Room temperature sensor switching (Aux.)

To use the temperature sensor on the wired remote controller only, change the setting to “Wired
remote controller” (01). This function will only work if the function setting 42 is set at “Both” (01)

Function

number

48

Setting

value

00 Both ♦
01 Wired remote controller

Setting description

(♦... Factory setting)

■Indoor unit fan control for energy saving for cooling

Enables or disables the power-saving function by controlling the indoor unit fan rotation when
the outdoor unit is stopped during cooling operation.

Function

number

49

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.

02: Enable or disable this function by remote controller setting.

*When using a wired remote controller without Indoor unit fan control for energy saving for

cooling function, or when connecting a single split converter, the setting cannot be made
by using the remote controller. Set to (00) or (01).

To confi rm if the remote controller has this function, refer to the operating manual of each

remote controller.

Setting

value

00 Disable
01 Enable
02 Remote controller ♦

Setting description

(♦... Factory setting)

■Switching functions for external output terminal

Functions of the external output terminal can be switched.

Function

number

60

Setting

value

00 Operation status ♦

01 to 08 (Setting prohibited)

09 Error status
10 Fresh air control

11 Auxiliary heater

Setting description

(♦... Factory setting)

■Setting record

Record any changes to the settings in the following table.

Setting description Setting value

Filter sign
Static pressure
Room temperature control for indoor

unit sensor
Room temperature control for

wired remote controller sensor
Auto restart
Room temperature sensor switching
Remote controller custom code
External input control
Room temperature sensor switching (Aux.)
Indoor unit fan control for energy saving for cooling
Switching functions for external output terminal

After completing the Function Setting, be sure to turn off the power and turn it on again.

Cooling
Heating
Cooling
Heating

7. TEST RUN

7.1. Check items

□ Is operation of each button on the remote controller normal?
□ Does each lamp light normally?
□ Is the drain normal?
□ Do not have an abnormal noise and vibration during operation?

Do not operate the air conditioner in test run for a long time.

7.2. Operation method

Depending on your installation, choose from the following:

■By the wireless remote controller (with [TEST RUN] button)

(1) To start test run, press [START/STOP] and [TEST RUN] on the remote controller.
(2) To end test run, press [START/STOP] on the remote controller.

■By the indoor unit or IR receiver unit

(1) To start test run, press [MANUAL AUTO] of the unit for more than 10 seconds (forced

cooling).

(2) T

o end test run, press [MANUAL AUTO] for more than 3 seconds or press [START/STOP]

on the remote controller.

The Operation indicator lamp and Timer indicator lamp will simultaneously fl ash during



the test run mode.

■By the wired remote controller

(1) For the operation method, refer to the installation manual and the operating manual of

the wired remote controller.

Heating test run will begin in a few minutes when HEAT is selected by the remote control­ler [reverse cycle model only].

8. FINISHING

Install the heat insulation material after performing a refrigerant leak check (Refer to the
Installation manual for the outdoor unit for details).

■Coupler heat insulation

CAUTION

• After checking for gas leaks (refer to the Installation Manual of the outdoor unit),
perform this section.

• Install heat insulation around both the large (gas) and small (liquid) pipes. Failure to
do so may cause water leaks.

• Insulate with the coupler heat insulation (accessories) around the gas pipe and liquid

pipe at indoor unit.

• After installing the coupler heat insulation, wrap both ends with vinyl tape so that

there is no gap.

• After affi xing the coupler heat insulation, secure it with 2 cable tie (large,

accessories), one on each end of the insulation.

• Make sure that the cable tie overlap the heat insulation pipe.

Coupler heat
insulation
(accessories)

Cable tie
(large, accessories)

Cover this portion with
heat insulation.

Heat insulation

9. CUSTOMER GUIDANCE

Explain the following to the customer in accordance with the operating manual:
(1) Starting and stopping method, operation switching, temperature adjustment, timer, air

fl ow switching, and other remote controller operations.

(2) Cleaning and maintenance of the product, and other items such as air fi lters and air

louvers if applicable.
(3) Give the operating and installation manuals to the customer.
(4) If the indoor unit custom code is changed, and the installation includes a wireless

remote controller, inform the customer the changed code. (On some wireless remote

controllers, the custom code may return to A when batteries are replaced.)

10. ERROR CODES

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. Refer to the lamp blinking patterns and error codes in
the table. An error display is displayed only during operation.

Error display

OPERATION

lamp

(green)















































●

TIMER

ECONOMY

lamp

(orange)

(1)

(1)

(1)

(1)

(1)

(2)

(2)

(2)

(2)

(2)

(2)

(2)

(3)

(3)

(3)

(3)

(3)

(3)

(4)

(4)

(4)

(5)

(5)

(5)



































(10)













●

lamp

(green)

(1)

(2)

(5)

(6)

(8)

(1)

(2)

(3)

(4)

(6)

(7)

(9)

(1)

(2)

(3)

(5)

(9)

(1)

(2)

(4)

(1)

(3)

(4)

Error code Description

Serial 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

External communication error

Unit number or Refrigerant
circuit address setting error
[Simultaneous Multi]

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

Manual auto switch error

Indoor unit power supply error for
fan motor

Indoor unit communication circuit
(wired remote controller) error

Room temp. sensor error

Indoor unit heat ex. middle temp.
sensor error

Human sensor error

Indoor unit fan motor error

Drain pump error

Electric air cleaner reverse VDD
error

En-19

OPERATION

lamp

(green)

(5)

●

(5)



(5)

●

(5)

●

(5)

●

(5)



(6)



(6)



(6)



(6)



(6)



(6)



(6)



(7)



(7)



(7)



(7)



(7)



(7)



(7)



(8)



(8)



(8)



(8)



(9)



Error display

TIMER

lamp

(orange)

(5)

●

(7)



(8)

●

(9)

●

(10)

●

(15)



(1)



(2)



(3)



(4)



(5)



(8)



(10)



(1)



(2)



(3)



(4)



(5)



(6)



(7)



(2)



(3)



(4)



(6)



(4)



ECONOMY

lamp

(green)

Error code Description

Filter set error

Damper error

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

Inverter error

Active filter error, PFC circuit error

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

• Sub-cool Heat Ex. gas inlet
temp. sensor error

• Sub-cool Heat Ex. gas outlet
temp. sensor error

Liquid pipe temp. sensor error

Current sensor error

• Discharge pressure sensor error

• Suction pressure sensor error

• High pressure switch error

Trip detection

OPERATION

lamp

(green)

(9)



(9)



(9)



(9)



(9)



(10)



(10)



(10)



(10)



(13)



Display mode

Error display

TIMER

(orange)

: 0.5s ON / 0.5s OFF

●

◊

: 0.1s ON / 0.1s OFF

( ) : Number of flashing

lamp









(10)













ECONOMY

lamp

(green)

(5)

(7)

(8)

(9)

(1)

(3)

(4)

(5)

(2)

Error code Description

Compressor rotor position
detection error (permanent stop)

Outdoor unit fan motor 1 error

Outdoor unit fan motor 2 error

4-way valve error

Coil (expansion valve) error

Discharge temp. error

Compressor temp. error

High pressure error

Low pressure error

Branch boxes error
[Flexible Multi]

En-20