Fujitsu AUTG54KRLA Installation Manual

AIR CONDITIONER

INSTALLATION MANUAL

INDOOR UNIT (Cassette Type)

For authorized service personnel only.

AUTG30KR

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A

AUTG36KR



A

AUTG45KR



A

AUTG54KR



A

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INSTALLATION MANUAL

PART No. 9381798094

Indoor Unit (Cassette Type)

Contents

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

2. ABOUT THIS PRODUCT ………………………………………………………………… 4

2.1. Special tools for R32 (R410A) …………………………………………………… 4

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

2.3. Optional parts ……………………………………………………………………… 4

3. GENERAL SPECIFICATION …………………………………………………………… 4

3.1. Selecting the pipe material ………………………………………………………… 4

3.2. Pipe requirement …………………………………………………………………… 5

3.3. Electrical requirement ……………………………………………………………… 5

3.4. Temperature and humidity range ………………………………………………… 5

4. INSTALLATION WORK ………………………………………………………………… 5

4.1. Selecting an installation location ………………………………………………… 5

4.2. Installation dimension ……………………………………………………………… 5

4.3. Installing the unit …………………………………………………………………… 6

4.4. Installing the drain pipe …………………………………………………………… 7

5. PIPE INSTALLATION …………………………………………………………………… 7

5.1. Pipe connection (Brazed connection) …………………………………………… 8

5.2. Installing heat insulation …………………………………………………………… 8

6. ELECTRICAL WIRING …………………………………………………………………… 8

6.1. Wiring method ……………………………………………………………………… 9

7. CASSETTE GRILLE INSTALLATION ………………………………………………… 10

8. REMOTE CONTROLLER SETTING ………………………………………………… 10

9. FUNCTION SETTING ………………………………………………………………… 10

9.1. Turning on the power …………………………………………………………… 10

9.2. Setting method …………………………………………………………………… 10

9.3. RC Sensor setting ……………………………………………………………… 10

9.4. Function Details ………………………………………………………………… 11

10. SPECIAL INSTALLATION METHODS ……………………………………………… 12

10.1. Group control system …………………………………………………………… 12

10.2. Set the R.C. address (DIP switch setting) …………………………………… 12

10.3. Multiple remote control system ………………………………………………… 13

11. OPTION AND OTHER CONNECTABLE DEVICES ………………………………… 13

11.1. Optional parts …………………………………………………………………… 13

11.2. External input and output ……………………………………………………… 13

12. CHECK LIST …………………………………………………………………………… 14

13. TEST RUN ……………………………………………………………………………… 14

14. CUSTOMER GUIDANCE ……………………………………………………………… 14

15. ERROR CODES ……………………………………………………………………… 15

NOTE: 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 operation 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 of this product must be done by experienced service technicians or professional installers only in accordance with this manual. Installation by nonprofessional or improper installation of the product may 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.

Do not use this equipment with air or any other unspecified refrigerant in the refrigerant lines. Excess pressure can cause a rupture.

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.

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.

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.

CAUTION

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

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 non-authorized device 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 explosive atmosphere.

Do not touch the fins of the heat exchanger. Touching the heat exchanger fins could result in damage to the fins or personal injury such as skin rupture.

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 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.

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. (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.)

This manual includes requirements of clauses according to Table DD.1 (Installation,

Maintenance and repair, Decommissioning)

WARNING

Auxiliary devices which may be a potential ignition source shall not be installed in the duct work.

Examples of such potential ignition sources are hot surfaces with a temperature exceeding 700°C and electric switching devices.

The appliance shall not be installed in an unventilated space, if that space is smaller than minimum installation area.

Total refrigerant amount

[kg]

3.200

3.400

3.600

3.800

4.000

4.200

4.400

4.600

4.800

5.000

≤1.842

1.843

2.000

2.200

2.400

2.600

2.800

3.000

Minimum installation area [m 2 ]

Installation height

A: 1.8m ≤ h0 < 2.2m

9.77

11.03

12.36

13.77

15.26

16.82

18.46

20.18

21.97

23.84

-

4.47

4.85

5.33

5.81

6.45

7.48

8.59

B: 2.2m ≤ h0

6.54

7.38

8.28

9.22

10.22

11.26

12.36

13.51

14.71

15.96

-

3.66

3.97

4.36

4.76

5.15

5.55

5.95

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(IEC 60335-2-40: 2018)

CAUTION

1 General

1-1 Installation

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

• Install the connection pipe to avoid damage, and protect it with covers as needed.

• This product uses low flammability refrigerant. Comply with the applicable national regulation regarding the gases.

• That flare connections shall be accessible for maintenance purposes.

1-2 Unventilated areas

• When installing this product to an unventilated area, pay attention to prevent fire and explosion caused by the stagnated gas in case of refrigerant leakage. (For products which contain more than 1.842 kg refrigerant.)

• The appliance shall be stored so as to prevent mechanical damage from occurring.

1-3 Qualification of workers

• As this product uses flammable refrigerant, its installation, repair, maintenance, removal, and deposition must be performed by dedicated service personnel who completed trainings and obtained relevant certificates provided by the domestic training facilities or manufactures certified for obtaining relevant national certificate stipulated by the applicable law.

2 Information on servicing

(Checks to the area)

• 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, 2-1 to 2-5 shall be completed prior to conducting work on the system.

2-1 Work procedure

• Work shall be undertaken under a controlled procedure so as to minimize the risk of a flammable gas or vapor being present while the work is being performed.

2-2 General work area

• 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.

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 toxic or flammable atmospheres.

• Ensure that the leak detection equipment being used is suitable for use with all applicable refrigerants, i.e. non-sparking, adequately sealed or intrinsically safe.

2-4 Presence of fire extinguisher

• If any hot work is to be conducted on the refrigerating equipment or any associated parts, appropriate fire extinguishing equipment shall be available to hand.

• Have a dry powder or CO

2

fire extinguisher adjacent to the charging area.

2-5 No ignition sources

• No person carrying out work in relation to a refrigerating system which involves exposing any pipe work shall use any sources of ignition in such a manner that it may lead to the risk of fire or explosion.

• All possible ignition sources, including cigarette smoking, should be kept sufficiently far away from the site of installation, repairing, removing and disposal, during which 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 refrigerating 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 actual refrigerant charge 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;

- refrigerating 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 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 specification, damage to seals, incorrect fitting of glands, etc.

• Ensure that the apparatus is mounted securely.

• Ensure that seals or sealing materials have not degraded to the point 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.

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.

NOTE: The use of silicon sealant can inhibit the effectiveness of some types of leak detection equipment.

Intrinsically safe components do not have to be isolated prior to working on them.

5 Cabling

• Check that cabling will not be subject to wear, corrosion, excessive pressure, vibration, sharp edges or any other adverse environmental effects.

• The check shall also take into account the effects of aging or continual vibration from sources such as compressors or fans.

6 Detection of flammable refrigerants

• Under no circumstances shall potential sources of ignition be used in the searching for or detection of refrigerant leaks.

• A halide torch (or any other detector using a naked flame) shall not be used.

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7 Leak detection methods

• The following leak detection methods are deemed acceptable for all refrigerant systems.

• Electronic leak detectors may be used to detect refrigerant leaks but, in the case of flammable refrigerants, the sensitivity may not be adequate, or may need recalibration.

(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 also 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.

NOTE:

Examples of leak detection fluids are

- bubble method,

- fluorescent method agents.

• 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.

8 Removal and evacuation

• When breaking into the refrigerant circuit to make repairs – or for any other purpose

– conventional procedures shall be used. However, for flammable refrigerants 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 (optional for R32);

- evacuate (optional for R32);

- purge with inert gas (optional for R32);

- open the circuit by cutting or brazing.

• The refrigerant charge shall be recovered into the correct recovery cylinders.

• For appliances containing flammable refrigerants other than R32 refrigerants, the system shall be purged with oxygen-free nitrogen to render the appliance safe for flammable refrigerants.

• This process may need to be repeated several times.

• Compressed air or oxygen shall not be used for purging refrigerant systems.

• For appliances containing flammable refrigerants, other than R32 refrigerants, refrigerants purging shall be achieved by breaking the vacuum in the system with oxygen-free nitrogen 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 oxygen-free nitrogen 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 potential ignition sources and that ventilation is 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 in an appropriate position according to the instructions.

- Ensure that the refrigerating system is earthed prior to charging the system with refrigerant.

- Extreme care shall be taken not to overfill the refrigerating system.

• Prior to recharging the system, it shall be pressure tested with the appropriate purging gas.

• 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.

10 Decommissioning

• Before carrying out this procedure, it is essential that the technician is completely familiar with the equipment and all its detail.

• 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 recovered 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 instructions. 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 refrigerating system unless 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.

• For appliances containing flammable refrigerants, ensure that there are labels on the equipment stating the equipment contains flammable refrigerant.

12 Recovery

• When removing refrigerant from a system, either for servicing or decommissioning, it is recommended good practice that all refrigerants are removed safely.

• When transferring refrigerant into cylinders, ensure that only appropriate refrigerant recovery cylinders are employed.

• Ensure that the correct number of cylinders for holding the total system charge is 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 all appropriate refrigerants including, when applicable, flammable refrigerants. In addition, a set of calibrated weighing scales shall be available and in good working order.

• Hoses shall be complete with leak-free disconnect couplings and in good condition.

• Before using the recovery machine, check that it is in satisfactory working order, has been properly maintained and that any associated electrical components are sealed to prevent ignition in the event of a refrigerant release. Consult manufacturer if in doubt.

• The recovered refrigerant shall be returned to the refrigerant supplier in the correct recovery cylinder, and the relevant waste transfer note arranged.

• Do not mix refrigerants in recovery units and especially not in cylinders.

• If compressors or compressor oils are to be removed, ensure that they have been evacuated to an acceptable level to make certain that flammable refrigerant does not remain within the lubricant.

• The evacuation process shall be carried out prior to returning the compressor to the suppliers.

• Only electric heating to the compressor body shall be employed to accelerate this process.

• When oil is drained from a system, it shall be carried out safely.

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

WARNING

CAUTION

CAUTION

CAUTION

This symbol shows that this product uses a low burning velocity material. 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 manual.

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

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2. ABOUT THIS PRODUCT

2. 1. Special tools for R32 (R410A)

Tool name

Gauge manifold

Charge hose

Vacuum pump

Gas leakage detector

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.

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.

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.

WARNING

• Use specified R32 or R410A piping only. For indoor units, use R32 flare less joint nut assy only. For outdoor units, use R32 or R410A flare nuts only.

Use of pipes, flare less nuts or flare nuts other than specified, may cause product malfunction, burst piping, or injury due to high internal pressure of the refrigerant cycle caused by any inflow air.

• 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.

2. 2. Accessories

WARNING

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.

• The following installation parts are furnished. Use them as required.

• Keep the installation manual in a safe place and do not discard any other accessories until the installation work has been completed.

Name and Shape

Installation manual

Q’ty

1

(This book)

Description

For installing indoor unit

Template

(Carton top)

Washer

1

8

For installing indoor unit

Coupler heat insulation (Large) For indoor side pipe joint (Gas pipe)

1

Coupler heat insulation (Small)

Insulation

1

For indoor side pipe joint

(Liquid pipe)

For installing drain pipe

1

Drain hose

Hose Band

1

For installing drain pipe

VP25 (O.D.32, I.D.25)

For installing drain hose

1

Drain hose heat insulation For installing drain pipe

1

Cable tie (Large)

Cable tie (Small)

4

For connection pipe fixing.

Only one is used for this model.

2

2. 3. Optional parts

Parts name

Wired Remote Controller

Wired Remote Controller

IR receiver unit

Wide panel

Panel spacer

Air outlet shutter plate

Insulation kit for High humidity

Fresh air intake kit

External input and output

PCB

External input and output

PCB box

External connect kit

Model No.

UTY-RVNYN

UTY-RNRYZ1

UTY-LBTYC

UTG-AKXA-W

UTG-BKXA-W

UTR-YDZK

UTZ-KXRA

UTZ-VXRA

UTY-XCSX

UTZ-GXRA

UTY-XWZXZG

Summary

For air conditioner operation

(3-wire type)


(2-wire type)


Wide panel hides the gap between the ceiling hole and the Cassette grille.

Installation in a space of 56 mm or greater is possible by using panel spacer when the height behind the ceiling is low.

Install the plate at outlet when carrying out 3-way direction operation

Install when the condition under the roof is over 80% in humidity and over 30°C in temperature.

To take fresh air

For connecting external devices

For installing the External input and output PCB

For control output port

3. GENERAL SPECIFICATION

3. 1. Selecting the pipe material

CAUTION

Do not use existing pipes.

Use pipes that have clean external and internal sides without any contamination which may cause trouble during use, such as sulfur, oxide, dust, cutting waste, oil, or water.

It is necessary to use seamless copper pipes.

Material : Phosphor deoxidized seamless copper pipes

It is desirable that the amount of residual oil is less than 40 mg/10 m.

Do not use copper pipes that have a collapsed, deformed, or discolored portion (especially on the interior surface). Otherwise, the expansion valve or capillary tube may become blocked with contaminants.

Improper pipe selection will degrade performance. As an air conditioner using R32

(R410A) incurs pressure higher than when using conventional refrigerant, it is necessary to choose adequate materials.

• Thicknesses of copper pipes used with R32 (R410A) are as shown in the table.

• Never use copper pipes thinner than those indicated in the table even if they are available on the market.

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)

Thickness [mm]

0.8

0.8

0.8

1.0

1.2

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3. 2. Pipe requirement

CAUTION

Refer to the installation manual of the outdoor unit for description of the length of connecting pipe or for difference of its elevation.

Diameter [mm (in.)]

Liquid

Gas

9.52 (3/8)

15.88 (5/8)

• Use pipe with water-resistant heat insulation.

CAUTION

Install heat insulation around both the gas and liquid pipes. Failure to do so may cause water leaks.

Use heat insulation with heat resistance above 120 °C. (Reverse cycle model only)

In addition, if the humidity level at the installation location of the refrigerant piping is expected to exceed 70 %, install heat insulation around the refrigerant piping.

If the expected humidity level is 70-80 %, use heat insulation that is 15 mm or thicker and if the expected humidity exceeds 80 %, use heat insulation that is 20 mm or thicker. If heat insulation is used that is not as thick as specified, condensation may form on the surface of the insulation.

In addition, use heat insulation with heat conductivity of 0.045 W/(m·K) or less (at 20 °C).

3. 3. 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, confirm related regulations, codes, or standards.

Cable

Connection cable

Conductor size

(mm 2 )

1.5 (MIN.)

Type

Type 60245 IEC57

Remarks

3Cable+Earth (Ground),

1φ240V

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

Cable

Conductor size

(mm

2

)

Type Remarks

Remote controller cable

(2-wire type)


(3-wire type)

0.33 to 1.25

0.33

Use shielded cable

(locally purchased) in accordance with the regional cable standard.

Non-polar 2-wired, twisted pair

Polar 3-wired

CAUTION

Do not install the indoor unit in the following areas:

• Area with high salt content, such as at the seaside.

It will deteriorate metal parts, causing the parts to fall 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 fall or the unit to leak water.

• 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 inflammables 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.

Do not install where there is the danger of combustible gas leakage.

Do not install the unit near a source of heat, steam, or flammable gas.

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.)

Install the unit where ambient temperature does not reach 60°C or more.

Take a measure such as ventilation for an environment in which heat is retained.

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 place where the height from the floor is more than 1.8 m.

Use the “Insulation kit for high humidity” (option), when the condition under the roof is over 80% in humidity and over 30°C in temperature. Otherwise, there is a risk of condensation on the ceiling.

(1) Locate where the air can be distributed evenly throughout the room by the 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) Install the unit where connection to the outdoor unit is easy.

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

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

(7) Install the unit where noise and vibrations are not amplified.

(8) Take servicing, etc., into consideration and leave the spaces. Also install the unit where the filter can be removed.

(9) Do not install the unit where it will be exposed to direct sunlight.

Correct initial installation location is important because it is difficult to move unit after it is installed.

4. 2. Installation dimension

• The ceiling rear height as shown in the figure.

Unit: m

Strong and durable ceiling

3. 4. Temperature and humidity range

Indoor

Thermostat setting range

Humidity

Cooling / Dry mode

About 18 to 32 °C

About 80% or less

Heating mode

About 16 to 30 °C

–

3 or more

Obstruction

4. INSTALLATION WORK

WARNING

Do not turn on the power until all installation work is complete.

Carrying and installation of the unit should be performed by a sufficient number of people and with sufficient equipment that is adequate for the weight of the unit.

Performing such work with an insufficient number of people or with inadequate equipment could result in dropping of the unit or personal injury.

CAUTION

For installation details, refer to the technical data.

4. 1. Selecting an installation location

Decide the mounting position together with the customer as follows.

WARNING

Select installation locations that can properly support the weight of the indoor 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.

Install the units securely so that they do not topple or fall.

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Floor

• This product can be installed at a height of up to 4.2 m. However, if the heights of the ceiling is higher than 3.2 m or lower than 2.7 m, it is necessary to set the position from remote controller. (See 9. FUNCTION SETTING)

Unit : mm

Discharge direction setting

• The discharge direction can be selected as shown below.

100 or more*

* Please ensure sufficient service access during installation.

(4 directions) (3 directions)

• For a 3-way outlet, make sure to perform the function setting on the remote control.

Also, make sure to use the optional shutter plate to block the outlet.

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• The ceiling height cannot be set in the 3-way outlet mode. Therefore, do not change the setting in the setting the ceiling height. (See 9. FUNCTION SETTING)

• When the outlet is shut, be sure to install the optional Air outlet shutter plate kit. For the details of installation, please refer to installation manual of the kit.

Human sensor

CAUTION

• Do not hit or push the human sensor. This may lead to damage or malfunction.

• Do not touch the human sensor. Any scratches or dirt may lead to incorrect detection.

• Do not place large objects near the human sensor. Also keep heating units outside the sensor’s detection area.

Example of sensitivity range:

When the installation height gets higher, the temperature sensitivity decreases.

Top view

Refrigerant pipe

Drain pipe

• Distribution ducts and fresh air inlet positions.

Distribution duct connecting port position

100

83

100

83

Cut out

Unit: mm

Drain pipe

Refrigerant pipe

Distribution duct connecting port

352

10 × 3.2 hole

Detailed diagram of distribution duct connecting port (4 sides)

114 bolt pitch

232

95

Cut out

4 × 3.2 hole

Fresh air inlet position

Insulation

Equal sensitivity range of temperature

3.2m

8.8m

0.8m

Human sensor

Ceiling height: 3.2 m

Detecting position: 0.8 m from floor surface

4. 3. Installing the unit

WARNING

Carrying and installation of the unit should be performed by a sufficient number of people and with sufficient equipment that is adequate for the weight of the unit. Performing such work with an insufficient number of people or with inadequate equipment could result in dropping of the unit or personal injury.

If the job is done with the panel frame only, there is a risk that the unit will come loose.

Please take care.

When fastening the hangers, make the bolt positions uniform.

4.3.1. Position the ceiling hole and hanging bolts

(1) Positions of the ceiling opening, hanging bolt pitch, piping and ducts.

• Ceiling opening and hanging bolt pitch.

20 - 45

950(Panel frame)

860 - 910(Ceiling opening)

840(Body frame)

796(Hanging bolt pitch)

20 - 45

Unit: mm

130

200

50

• Refrigerant piping and drain piping positions.

Unit: mm

Fresh air inlet position

NOTE:

When introducing fresh air into the indoor unit, please remove the insulation affixed to the drain pan.

(2) Setting the positions of hanging bolt and ceiling opening.

• Use an installation template (packaging top surface) to set the positions of the hanging bolt and ceiling opening and drill holes.

(3) Hanging structure.

• Select a strong structure for the hanging location.

• If necessary, reinforce the hanging bolt with quake proof columnar support material to prevent shaking.

• Use hanging bolts of M8-M10.

4.3.2. Body installation

(1) Install the attached washer and nut (prepared on site) onto the hanging bolt.

(2) Hook the body onto the hanging bolt.

(3) Adjust the dimensions of the ceiling surface from the body. After installing the Cassette grille, you can make fine adjustment of the height of the body. For details, refer to the installation manual of the Cassette grille.

WARNING

Perform final tightening by tightening the double nut firmly.

Be sure to install the body horizontally and adjust the height below the body and the ceiling surface properly.

Hanging bolt (locally purchased)

Nut A (locally purchased)

Washer (Accessories)

Drain pipe

(Connect the attached drain hose)

Liquid pipe

342

293

Gas pipe

45

After installing the body, tighten the nuts.

Washer (Accessories)

Nut B (Double Nut)

(locally purchased)

Unit: mm

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4.3.3. Leveling

Using a level, or vinyl hose filled with water, fine adjust so that the body is level.

Inclined installation so as the drain pipe side is higher may cause a malfunction of the float switch, and may cause water leakage.

Drain pipe

Vinyl hoses

Working procedure

(1) Install the attached drain hose to the drain port of the body. Attach hose band on top of the drain hose.

(2) Use vinyl adhesive agent to glue the drain piping (PVC pipe VP25) which is prepared on site or elbow socket. (Apply color adhesive agent evenly until the gauge line and seal.)

(3) Check the drainage.

(4) Install the heat insulation.

(5) Use the attached heat insulation to insulate the drain port and band parts of the body.

Install the knob faces upward

Attached hose band

Attached drain hose heat insulation

Locally arranged vinyl pipe

4. 4. Installing the drain pipe

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 final 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.)

Install the drain pipe:

• Install the drain pipe with downward gradient (1/50 to 1/100) and so there are no rises or traps in the pipe.

• Use general hard polyvinyl chloride pipe (VP25) [outside diameter 32 mm] and connect it with adhesive (polyvinyl chloride) so that there is no leakage.

• When the pipe is long, install supporters.

• Do not perform air bleeding.

• Always heat insulate the indoor side of the drain pipe.

• If it is impossible to have sufficient gradient of pipe, perform drain lift-up.

Drain pipe

Hanging fittings

Pipe size

VP25 (O.D. 32 mm)

1.5 to 2 m

Attached drain hose

Attached heat insulation

(a) Top view (b) Side view

Applying area of

35

Hose band

Gauge line

4 or less

(c) Top view

5-10

20

VP25

(d) Hose opening view

Wind the attached heat insulation around the hose band

Make sure the alignment is on top

Make sure there are no gaps

Unit: mm

VP25 (O.D. 32 mm)

Downward gradient 1/100 to 1/50

PROHIBITED:

Rise

Trap

Air bleeding

When lifting up drain:

• Height of inclined pipe should be less than 850 mm from the ceiling. A rise dimension over this range will cause leakage.

• Lift up the pipe vertically at the position of 300 mm or less from the unit.

300 mm or less

Downward gradient

1/100 to 1/50

VP25 (O.D. 32 mm) local arrangement

850 mm or less

Horizontal or upward gradient

5. PIPE INSTALLATION

WARNING

During installation, make sure that the refrigerant pipe is attached firmly before you run the compressor.

Do not operate the compressor under the condition of refrigerant piping not attached properly with 2-way or 3-way valve open. This may cause abnormal pressure in the refrigeration cycle that leads to breakage and even injury.

During the pump-down operation, make sure that the compressor is turned off before you remove the refrigerant piping.

Do not remove the connection pipe while the compressor is in operation with 2-way or

3-way valve open. This may cause abnormal pressure in the refrigeration cycle that leads to breakage and even injury.

When installing and relocating the air conditioner, do not mix gases other than the specified refrigerant (R32 or R410A) to enter the refrigerant cycle.

If air or other gas enters the refrigerant cycle, the pressure inside the cycle will rise to an abnormally high value and cause breakage, injury, etc.

If refrigerant leaks while work is being carried out, ventilate the area. If the refrigerant comes in contact with a flame, it produces a toxic gas.

CAUTION

Be more careful so that foreign matter (oil, water, etc.) does not enter the piping than with refrigerant R32 or R410A models. Also, when storing the piping, securely seal the openings by pinching, taping, etc.

While brazing the pipes, be sure to purge with dry nitrogen gas.

850 mm or less

VP30 (O.D. 38 mm) or more Downward gradient 1/100 to 1/50

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5. 1. Pipe connection (Brazed connection)

5.1.1. Brazing

CAUTION

If air or another type of refrigerant enters the refrigeration cycle, the internal pressure in the refrigeration cycle will become abnormally high and prevent the unit from exerting its full performance.

Apply nitrogen gas while brazing the pipes.

Nitrogen gas pressure: 0.02 MPa

(= pressure felt sufficiently on the back of your hand)

Pressure regulating valve

Cap

Nitrogen gas

Brazing area

If a pipe is brazed without applying nitrogen gas, it will create an oxidation film.

This can degrade performance of damage the parts in the unit (such as the compressor or valves).

Do not use flux to braze pipes. If the flux is the chlorine type, it will cause the pipes to corrode. In addition, if the flux contains fluoride, it will affect the refrigerant piping system due to deterioration of refrigerant oil.

For brazing material, use phosphor copper that does not require flux.

Ventilate the area appropriately when brazing, to prevent fire spread.

When brazing, make sure that there is no hazardous or inflammable objects in the surrounding area to avoid risk of fire.

5.1.2. Bending pipes

• If pipes are shaped by hand, be careful not to collapse them.

• 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 any more.

• Do not bend or stretch the pipes more than three times.

CAUTION

To prevent breaking of the pipe, avoid sharp bends. Bend the pipe with a radius of curvature of 150 mm or over.

If the pipe is bent repeatedly at the same place, it will break.

5.1.3. Connecting pipes

• The gas and liquid pipes connections must be brazed.

• Be sure to braze them before performing any wiring work or installing the drain pipe.

Liquid pipe

Cabinet

Gas pipe

Pinch pipe

Pipe cover

Pipe heat insulation

WARNING

• Be sure to use wet cloth, etc., to protect the pipe heat insulation as shown below.

Because these parts are extremely flammable, they can cause a fire if they are not properly protected.

• Do not expose the unit (cabinet, pipe cover, etc.) and the inlet grille to the flame.

The exposure of these parts to the flame will adversely affect their appearance and functions or cause a fire.

Pinch pipe

Pinch pipe

Do not expose the pipe cover and

Cabinet to the flame.

Protect these areas with wet cloth, etc.

Completely cover the pipe heat insulation with wet cloth, etc., to prevent them from burning.

CAUTION

• Melt the brazing filter metal on connecting part using a burner and remove the pinch pipe.

• Remove the pinch pipe only after protecting it from flame.

• Remove the pinch pipe immediately before the connection.

5. 2. Installing heat insulation

Install the heat insulation material after performing a refrigerant leak check (see the installation manual for the outdoor unit for details).

After checking for the gas leaks, insulate by wrapping insulation around the 2 parts (gas and liquid) of the indoor unit coupling, using the Coupler heat insulation.

After installing the Coupler heat insulation, wrap both ends with vinyl tape so that there is no gap.

Cable tie (Large)

(Accessories)

Coupler heat insulation

(Accessories)

Body

No gap

Be sure to overlap the insulation

No gap

CAUTION

There should be no gaps between the insulation and the product.

Coupler heat insulation

CAUTION

After connecting the piping, check all the joints for gas leakage with gas leak detector.

Once the pressure checking has been completed using nitrogen, please refer to the outdoor installation manual to complete the evacuation process.

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

6. ELECTRICAL WIRING

WARNING

Electrical work must be performed in accordance with this Manual by a person certified under the national or regional regulations. Be sure to use a dedicated circuit for the unit.

An insufficient power supply circuit or improperly performed electrical work can cause serious accidents such as electric shock or fire.

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

Use the included connection cables and power cables or ones specified by the manufacturer. Improper connections, insufficient insulation, or exceeding the allowable current can cause electric shock or fire.

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 fire.

Do not modify the power cables, use extension cables, or use any branches in the wiring. Improper connections, insufficient insulation, or exceeding the allowable current can cause electric shock or fire.

Match the terminal board numbers and connection cable colors with those of the outdoor unit. 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 fire.

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

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

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

Install a earth (ground) leakage breaker. In addition, install the earth (ground) leakage breaker so that the entire AC main power supply is cut off at the same time. Otherwise, electric shock or fire could result.

Always connect the earth (ground) cable.

Improper earthing (grounding) work can cause electric shocks.

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

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

Unit shall be earthed (grounded) in compliance with the applicable local and national codes.

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CAUTION

If the indoor unit connection cable and power supply are wired incorrectly, the air conditioner may be damaged or cause malfunction.

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.

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 together. Bundling these cables together will cause miss operation.

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

• Establish 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 careful not to generate a spark as follows for using a flammable refrigerant.

• Do not remove the fuse while power is on.

• Do not disconnect plug from the wall outlet and 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. 1. Wiring method

6.1.1. Connection diagrams

Connection cable to outdoor unit

Earth (ground) line

Power line

Control line

Wired remote controller cable

2-wire type

Red

White or

Red

White

Black

3-wire type

WARNING

Use ring terminals and tighten the terminal screws to the specified torques, otherwise, it may cause abnormal overheating and possibly cause serious damage inside the unit.

M4 screw

Wire

Tightening torque [N·m (kgf·cm)]

1.2 to 1.8 (12 to 18)

Screw with special washer

Screw with special washer

Ring terminal

Wire

Ring terminal

Terminal blocks

Remote controller cable

For 2-wire type

30 mm

For 3-wire type

30 mm

6.1.3. Wiring procedure

Connection cable

Control line

Power line

Outdoor unit

Connection cable

Earth

(ground)

Remote controller cable

DIP switch

Control box

2-wire type

Print circuit board

(PCB)

3-wire type

6.1.2. Connection cable preparation

Power supply cable or connection cable

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

30 mm

Earth (ground) cable

Power supply cable or connection cable

40 mm or more

• Use a 4-core wire cable.

How to connect wiring to the terminals.

(1) Use ring terminals with insulating sleeves as shown in the figure below to connect to the terminal block.

(2) Securely crimp the ring terminals to the wires using an appropriate tool so that the wires do not come loose.

Ring terminal

Strip 10 mm

Sleeve

(3) Use the specified wires, connect them securely, and fasten them so that there is no stress placed on the terminals.

(4) Use an appropriate screwdriver to tighten the terminal screws.

Do not use a screwdriver that is too small, otherwise, the screw heads may be damaged and prevent the screws from being properly tightened.

(5) Do not tighten the terminal screws too much, otherwise, the screws may break.

(6) See the table below for the terminal screw tightening torques.

Red

White

Remote controller


Black

White

Red

Remote controller


Factory setting

“2 WIRE”

Connecting the

Optional parts

Set to “3 WIRE”

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

CAUTION

Tighten the indoor unit connection cable and power supply indoor and outdoor unit, terminal board connections firmly with the terminal board screws. Faulty connection may cause a fire.

Connect the indoor unit connection cable by matching the numbers of the outdoor and indoor units terminal board numbers as shown in terminal label.

Be sure to refer to the connection diagram for the correct field wiring. Wrong wiring causes malfunction of the unit.

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6.1.4. 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 and wiring cover by loosening the screws.

Wiring connecting port

(a)

Wiring cover

Control box cover

(b)

(4) Replace the Control box cover and Wiring cover. Securely tighten the screws.

(2) Thread each cable through the holes or indents of the cabinet and connect the wires.

(3) After wiring is complete, secure the cables with the cable clamps.

Cable clamp

Power supply cable or connection cable

Detail (a)

Cable tie (small)

(Accessory)

Cure the wiring connecting port and remote controller connecting port with paste or heat insulation so that insects or dust will not enter the unit

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.

7. CASSETTE GRILLE INSTALLATION

• Install according to the installation manual for Cassette grille.

• Be sure to confirm there is no gap between the panel and main unit after installing the

Cassette grille.

8. REMOTE CONTROLLER SETTING

To install and set the remote controller, refer to the installation manual of the remote controller (wired type).

9. FUNCTION SETTING

9. 1. Turning on the power

CAUTION

Recheck the wiring. Incorrect wiring will cause trouble.

When initially starting up this unit, the following setting screen will be displayed. Settings configured at this stage can be changed afterwards.

9. 2. Setting method

See installation manual of remote controller.

9. 3. RC Sensor setting

The detection location of the room temperature can be selected from the following two examples. Choose the detection location that is best for the installation location.

A. Indoor unit setting (factory setting)

The room temperature is detected by the indoor unit temperature sensor.

A

Indoor unit


B. Remote controller setting

The room temperature is detected by the remote controller temperature sensor.

B

Indoor unit

Detail (b)

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CAUTION

When selecting the “Remote controller setting”, if the detected temperature value between the temperature sensor of the indoor unit and the temperature sensor of the remote controller varies significantly, it is likely to return to the control status of temperature sensor of the indoor unit temporarily.

As the temperature sensor of remote controller detects the temperature near the wall, when there is a certain difference between the room temperature and the wall temperature, the sensor will not detect the room temperature correctly sometimes.

Especially when the outer side of the wall on which the sensor is positioned is exposed to the open air, it is recommended to use the temperature sensor of the indoor unit to detect the room temperature when the indoor and outdoor temperature difference is significant.

The temperature sensor of the remote controller is not only used when there is a problem in the detection of the temperature sensor of the indoor unit.

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9. 4. 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)

Function number

Setting value

00

Setting description

Standard (2500 hours)

11

01

02

03

Long interval (4400 hours)

Short interval (1250 hours)

No indication ♦

Ceiling height

Select the appropriate ceiling height according to the place of installation.


Function number

20

Setting value

00

01

02


Standard (3.2m)

High ceiling (4.2m)

Low ceiling (2.7m )

♦

The ceiling height values are for the 4-way outlet.

Do not change this setting in the 3-way outlet mode.

Outlet directions

Select the appropriate number of outlet directions according to the installation conditions.


Function number

22

Setting value

00

01


4-way

3-way

♦

Vertical airflow direction range control

To prevent draft, change the setting to “Upward” (01).

Note that the airflow in certain usage conditions may leave the ceiling dirty. In such cases, the use of the optional “PANEL SPACER KIT” is recommended.


Function number

23

Setting value

00

01


Standard

Upward

♦

Ceiling

UP

Standard

Upward

Swing range

Outlet cross section

Room temperature sensor control for cooling

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)

11

12

13

14

07

08

09

10

Setting value

00

01

02

03

04

05

06

15

16

17


Standard setting

No correction 0.0 °C (0 °F)

-0.5 °C (-1 °F)

-1.0 °C (-2 °F)

-1.5 °C (-3 °F)

-2.0 °C (-4 °F)

-2.5 °C (-5 °F)

-3.0 °C (-6 °F)

-3.5 °C (-7 °F)

-4.0 °C (-8 °F)

+0.5 °C (+1 °F)

+1.0 °C (+2 °F)

+1.5 °C (+3 °F)

+2.0 °C (+4 °F)

+2.5 °C (+5 °F)

+3.0 °C (+6 °F)

+3.5 °C (+7 °F)

+4.0 °C (+8 °F)

♦

More

Cooling

Less

Heating

Less

Cooling

More

Heating

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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

Setting value

00


No correction ♦

01

02

03

No correction 0.0 °C (0 °F)

-0.5 °C (-1 °F)

-1.0 °C (-2 °F)

35

(For cooling)

36

(For heating)

15

16

17

11

12

13

14

08

09

10

04

05

06

07

-1.5 °C (-3 °F)

-2.0 °C (-4 °F)

-2.5 °C (-5 °F)

-3.0 °C (-6 °F)

-3.5 °C (-7 °F)

-4.0 °C (-8 °F)

+0.5 °C (+1 °F)

+1.0 °C (+2 °F)

+1.5 °C (+3 °F)

+2.0 °C (+4 °F)

+2.5 °C (+5 °F)

+3.0 °C (+6 °F)

+3.5 °C (+7 °F)

+4.0 °C (+8 °F)

More

Cooling

Less

Heating

Less

Cooling

More

Heating

Auto restart

Enable or disable automatic restart after a power interruption.


Function number

40

Setting value

00

01


Enable

Disable

♦

* 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.

Room temperature sensor switching

(Only for wired remote controller)

When using the Wired remote controller temperature sensor, change the setting to “Both”

(01).


Function number

42

Setting value

00

01


Indoor unit

Both

♦

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

Remote controller custom code

(Only for wireless remote controller)

The indoor unit custom code can be changed.

Select the appropriate custom code.


Function number

Setting value

00

01


44

A

B

02

03

C

D

♦

External input control

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


Function number

46

Setting value

00

01

02

03


Operation/Stop mode 1

(Setting prohibited)

Forced stop mode

Operation/Stop mode 2

♦

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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

01


Both

Wired remote controller

♦

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

Setting value

00


Disable

49 01

02

Enable

Remote controller ♦

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 confirm if the remote controller has this function, refer to the operation manual of each remote controller.

Switching functions for external output terminal

Functions of the external output terminal can be switched.


Function number

60

Setting value

00

09


Operation status

Error status

10

11

Indoor unit fan operation status

External heater

♦

36

40

42

44

46

48

49

60

30

31

35

20

22

23

Setting record

•

Record any changes to the settings in the following table.

Function number

11 Filter sign

Setting

Ceiling height

Outlet directions

Vertical airflow direction range control

Room temperature sensor control for cooling

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 function for external outlet terminal

Setting value

Cooling

Heating

Cooling

Heating

After completing the function setting, be sure to turn off the power and turn it on again.

10. SPECIAL INSTALLATION METHODS

CAUTION

Be sure to turn off the electrical breaker before making settings.

Do not set the DIP switch or rotary switch of this unit except as specified in this manual or the operation manual supplied with the air conditioner.

Setting the switches other than specified will cause an accident or trouble.

Do not touch the circuit board and circuit board parts directly with your hands. Otherwise, injury or electric shock could result.

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

Use an insulated screwdriver to set the dip switches.

10. 1. Group control system

CAUTION

Group control is only possible between units with remote controllers of the same type.

To confirm the type of remote controller, see the back of the remote controller or

“2.3. Optional parts”.

With a single remote controller, up to 16 units can be simultaneously operated.

I.U.

I.U.

I.U.

I.U.

B C D E

A

Master

A, B, C, D, E : Remote controller cable. (Refer to 3.3. Electrical requirement.)

A+B+C+D+E ≤ 500 m.

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

ON

1 2 3 4

RC AD

Remote controller address

(1) 2-wire type

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

Since the remote controller address settings are automatically configured, you do not need to configure them.

If configuring manually, it is necessary to configure both the indoor unit and the remote controller. For details, please refer to the remote controller manual.

(2) 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 Setting range Type of switch

ON

Remote controller address

00 to 15

Setting example

00

1 2 3 4

RC AD

Example

If 4 indoor units are connected.

Indoor unit

RC AD SW

00

Indoor unit

RC AD SW

01

Indoor unit

RC AD SW

02

Indoor unit

RC AD SW

03

Remote controller

1

2

3

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

Indoor unit R.C. address

13

14

15

16

9

10

11

12

7

8

5

6

3

4

1

2

12

13

14

15

08

09

10

11

04

05

06

07

00

01

02

03

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

1

OFF

ON

OFF

ON

OFF

ON

OFF

DIP SWITCH No.

2 3

OFF

OFF

ON

ON

OFF

OFF

ON

ON

OFF

OFF

ON

ON

OFF

OFF

ON

ON

OFF

OFF

OFF

OFF

ON

ON

ON

ON

OFF

OFF

OFF

OFF

ON

ON

ON

ON

NOTE:

Be sure to set consecutive R.C. address.

The indoor units cannot be operated if a number is skipped.

10. 3. Multiple remote control system

Up to 2 remote controllers can be used to operate the indoor units.

CAUTION

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

I.U.

I.U.

A A B

Master Master Slave

A, B : Remote controller cable. (Refer to 3.3. Electrical requirement.)

A ≤ 500 m, A+B ≤ 500 m

11. OPTION AND OTHER CONNECTABLE DEVICES

Terminal

(External in)

CN48

(IR receiver)

CN65

(External in/out PCB)

CN47

(External out)

11. 1. Optional parts

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.

Option type

UTY-LBTYC (IR Receiver)

UTY-XWZXZG (Connect wire)

UTZ-VXRA (Fresh air intake)

UTY-XCSX (External input and output PCB)

Connector No.

CN47*1

CN48

CN47*1

(UTY-XCSX)*2

CN65*3

*1: For external output terminal setting, refer to Function No.60 in “9. FUNCTION SETTING”.

*2: Refer to the installation manual of the External input and output PCB.

*3: Various settings are available by using the optional External input and output PCB.

OFF

ON

ON

ON

ON

ON

ON

ON

ON

4

OFF

OFF

OFF

OFF

OFF

OFF

OFF

WARNING

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

1

2

3

11. 2. External input and output

11.2.1. 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.

Terminal

Connected device

● Dry contact terminal

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

PCB

*1

Terminal

(External in)

Connected device

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

Operation behavior

● Input signal type

ON

OFF

Edge

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

Input signal Command

OFF → ON Operation

ON → OFF Stop

● When function setting is “Forced stop” mode.


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.


OFF → ON Operation

ON → OFF Stop (R.C. disabled)

11.2.2. 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

PCB

Connected device

CN47

Relay (locally purchased)

or

● When displaying “Operation/Stop”

PCB

Resistor

CN47

LED

Connected device

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Operation behavior

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

Function setting

Stop

00

Operation

60

09

10

11

Status

Normal

Error

Indoor unit fan stop

Indoor unit fan operation

External heater OFF

External heater ON

Output voltage

0V

DC 12 V

0V

DC 12 V

0V

DC 12 V

0 V

DC 12V

11.2.3. Connection methods

Wire modification

• Remove insulation from wire attached to wire kit connector.

• Remove insulation from locally purchased cable. Use crimp type insulated butt connector to join field 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

In following figure, all the possible connections are done for description.

In actual installation, connections will differ according to each installation requirements.

PCB

1

2

3

Clamp

External input/output PCB communication wire

External output wire

Clamp

12. CHECK LIST

Pay special attention to the check items below when installing the indoor unit (s). After installation is complete, be sure to check the following check items again.

CHECK ITEMS

Has the indoor unit been installed correctly?

Has there been a check for gas leaks (refrigerant pipes)?

Has heat insulation work been completed?

Does water drain easily from the indoor units?

Are the wires and pipes all connected completely?

Is the connection cable the specified thickness?

Are the inlets and outlets free of any obstacles?

After installation is completed, has the proper operation and handling been explained to the user?

If not performed correctly CHECK BOX

Vibration, noise, indoor unit may drop

No cooling, No heating

Water leakage

Water leakage

No operation, heat or burn damage

No operation, heat or burn damage

No cooling, No heating

13. TEST RUN

Check items

(1) Is operation of each button on the remote control unit normal?

(2) Does each lamp light normally?

(3) Do airflow 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]

Depending on your installation, choose from the following:

By the wireless remote controller (with “TEST RUN” button)

•

To start test run, press the “START/STOP” button and the “TEST RUN” button on the remote controller.

• To end test run, press the remote controller “START/STOP” button.

By the indoor unit or IR receiver unit

• To start test run, press the “MANUAL AUTO” button of the unit for more than 10 seconds (forced cooling).

•

To end test run, press the “MANUAL AUTO” button for more than 3 seconds or press the remote controller “START/STOP” button.

By the wired remote controller

• For the operation method, refer to the installation manual and the operation manual of the wired remote controller.

The Operation indicator lamp and Timer indicator lamp will simultaneously flash during the test run mode.

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

14. CUSTOMER GUIDANCE

Explain the following to the customer in accordance with the operation manual:

(1) Starting and stopping method, operation switching, temperature adjustment, timer, air flow switching, and other remote controller operations.

(2) Cleaning and maintenance of the product, and other items such as air filters 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.)

External input wire

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15. ERROR CODES

[Troubleshooting at the remote controller LCD]

UTY-RNRY / UTY-RNRG (2-wire type)

Error icon

Status

Air Flow Direction

VT

1

Individual

Economy

Off

Monitor

Touch the [Next Page] (or [previous page]) to switch to other indoor unit information.

Page 1/ 4

Next

Page

Error

Information

Touch the [Status].

Touch the [Error Information].

2-digit numbers are corresponding to the error code in the preceding table.

For more information, refer to the installation manual of the remote controller.

If you use a wired type remote controller, error codes will appear on the remote controller display. If you use a wireless remote controller, the lamps on the IR receiver unit will output error codes by way of blinking patterns. See the lamp blinking patterns and error codes in the table below. An error display is displayed only during operation.

The error code table contains errors irrelevant to this product as well.

Error display

OPERATION lamp (green)

TIMER lamp

(orange)

ECONOMY lamp

(green)

Wired remote controller

Error code



(1)



(1)

Description

Serial communication error





(1)

(1)





(2)

(5)

Wired remote controller communication error

Check run unfinished





(1)

(1)





(6)

(8)

Peripheral unit transmission PCB connection error

External communication error





(2)

(2)





(1)

(2)

Unit number or Refrigerant circuit address setting error

[Simultaneous Multi]

Indoor unit capacity error



(2)



(3)

Combination error





(2)

(2)





(4)

(6)

• 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







(2)

(2)

(3)







(7)

(9)

(1)

Primary unit, secondary unit setup error [Simultaneous Multi]

Connection unit number error in wired remote controller system

Power supply interruption error





(3)

(3)





(2)

(5)

Indoor unit PCB model information error

Manual auto switch error







(3)

(3)

(4)







(9)

(10)

(1)

Indoor unit power supply error for fan motor

Indoor unit communication circuit

(wired remote controller) error

Room temp. sensor error





(4)

(4)





(2)

(4)

Indoor unit Heat Ex. Middle temp. sensor error

Human sensor error



(5)



(1)

Indoor unit fan motor error



(5)



(3)

Drain pump error

Damper error



(5)



(7)

En-15

Error display

OPERATION lamp (green)

TIMER lamp

(orange)

ECONOMY lamp

(green)

Wired remote controller

Error code



(5)



(15)

Description

Indoor unit error







(6)

(6)

(6)







(1)

(2)

(3)

Outdoor unit reverse/missing phase and wiring error

Outdoor unit main PCB model information error or communication error

Inverter error



(6)



(4)

Active filter error, PFC circuit error



(6)



(5)

Trip terminal L error







(6)

(6)

(7)







(8)

(10)

(1)

Outdoor unit rush current limiting resister temp. rise error

Display PCB microcomputers communication error

Discharge temp. sensor error



(7)



(2)

Compressor temp. sensor error





(7)

(7)





(3)

(4)

Outdoor unit Heat Ex. liquid temp. sensor error

Outdoor temp. sensor error



(7)



(5)

Suction Gas temp. sensor error





(7)

(7)





(6)

(7)

• 2-way valve temp. sensor error

• 3-way valve temp. sensor error

Heat sink temp. sensor error





(8)

(8)





(2)

(3)

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

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

Liquid pipe temp. sensor error



(8)



(4)

Current sensor error





(8)

(9)





(6)

(4)

• Discharge pressure sensor error

• Suction pressure sensor error

• High pressure switch error

Trip detection





(9)

(9)





(5)

(7)

Compressor rotor position detection error (permanent stop)

Outdoor unit fan motor 1 error



(9)



(8)

Outdoor unit fan motor 2 error



(9)



(9)

4-way valve error



(9)



(10)

Coil (expansion valve) error



(10)



(1)

Discharge temp. error



(10)



(3)

Compressor temp. error



(10)



(4)

High pressure error



(10)



(5)

Low pressure error



(13)



(2)

Display mode



: 0.5s ON / 0.5s OFF

: 0.1s ON / 0.1s OFF

( ) : Number of flashing

Branch boxes error

[Flexible Multi]

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