AIR CONDITIONER

INSTALLATION MANUAL

OUTDOOR UNIT

For authorized service personnel only.

INSTALLATIONSANLEITUNG

AUSSENGERÄT

Nur für autorisiertes Fachpersonal.

MANUEL D’INSTALLATION

APPAREIL EXTÉRIEUR

Pour le personnel d’entretien autorisé uniquement.

MANUAL DE INSTALACIÓN

UNIDAD EXTERIOR

Únicamente para personal de servicio autorizado.

MANUALE DI INSTALLAZIONE

UNITÀ ESTERNA

A uso esclusivo del personale tecnico autorizzato.

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ΕΞΩΤΕΡΙΚΗ ΜΟΝΑΔΑ

Μόνο για εξουσιοδοτημένο τεχνικό προσωπικό.

MANUAL DE INSTALAÇÃO

UNIDADE EXTERIOR

Apenas para pessoal de assistência autorizado.

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ВНЕШНИЙ МОДУЛЬ

Только для авторизованного обслуживающего персонала.

MONTAJ KILAVUZU

DIŞ ÜNİTE

Yalnızca yetkili servis personeli için.

PART No. 9379069403-02

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INSTALLATION MANUAL

OUTDOOR UNIT

PART No. 9379069403-02

Contents

English

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

1

2. ABOUT THE UNIT .......................................................................................................2

2.1. Precautions for using R410A refrigerant ............................................................2

2.2. Special tools for R410A ......................................................................................2

2.3. Accessories ........................................................................................................2

2.4. Operating range .................................................................................................2

3. INSTALLATION WORK ...............................................................................................2

3.1. Selecting an installation location ........................................................................2

3.2. Drain installation .................................................................................................3

3.3. Installation dimensions .......................................................................................3

3.4. Transporting the unit ..........................................................................................4

3.5. Installation ..........................................................................................................4

4. PIPE SELECTION .......................................................................................................4

4.1. Selecting the pipe material .................................................................................4

4.2. Protection of pipes .............................................................................................5

4.3. Refrigerant pipe size and allowable piping length ..............................................5

4.4. Connectable pipe diameter and max. piping length ...........................................5

5. PIPE INSTALLATION-1 ...............................................................................................5

5.1. Opening a knock out hole ..................................................................................5

5.2. Brazing ...............................................................................................................5

5.3. Flare connection (pipe connection) ....................................................................5

5.4. Sealing test ........................................................................................................6

5.5. Vacuum process ................................................................................................7

5.6. Additional charging .............................................................................................7

6. ELECTRICAL WIRING ................................................................................................7

6.1. Notes for electrical wiring ...................................................................................7

6.2. Selecting circuit breaker and wiring ...................................................................8

6.3. Knock out holes for wiring ..................................................................................8

6.4. Wiring method ....................................................................................................9

7. PIPE INSTALLATION-2 ..............................................................................................9

7.1. Installing insulation .............................................................................................9

7.2. Filling with putty ..................................................................................................9

8. HOW TO OPERATE DISPLAY UNIT .........................................................................

1 0

8.1. Various setting methods ...................................................................................

1 0

8.2. Description of display .......................................................................................

1 0

9. LOCAL SETTING ......................................................................................................

1 0

9.1. Low noise mode (Local work) ..........................................................................

1 0

9.2. Peak cut mode (Local work) .............................................................................

11

10. TEST RUN .................................................................................................................

1 2

10.1. Check items before performing the test run .....................................................

1 2

10.2. Test run method ...............................................................................................

1 2

11. PUMP DOWN ............................................................................................................

1 2

11.1. Preparation for pump down ..............................................................................

1 3

11.2. Pump down procedure .....................................................................................

1 3

12. ERROR CODE DISPLAY ..........................................................................................

1 3

12.1. How to check error code ..................................................................................

1 3

12.2. Error code check table .....................................................................................

1 4

1. SAFETY PRECAUTIONS

•

•

•

Be sure to read this manual carefully 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

This mark indicates procedures which, if improperly performed, might lead to the death or serious injury of the user.

CAUTION

This mark indicates procedures which, if improperly performed, might possibly result in personal harm to the user, or damage to property.

WARNING

Never touch electrical components immediately after the power supply has been turned off. Electrical shock may occur. After turning off the power, always wait 10 minutes or more before touching electrical components.

Request your dealer or a professional installer to install the outdoor unit in accordance with this installation manual. an improperly installed unit can cause serious accidents such as water leakage, electric shock, or fire.

If the outdoor unit is installed in disregard of the instructions in the installation 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 while work is being carried out, ventilate the area. If the refrigerant comes in contact with a flame, it produces a toxic gas.

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WARNING

Installation work must be performed in accordance with national wiring standards by authorized personnel only.

Do not use this equipment with air or any other unspecified refrigerant in the refrigerant lines.

Excess pressure can cause a rupture.

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

When installing and relocating the air conditioner, do not mix gases other than the specified refrigerant (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 rupture, injury, etc.

Do not remove the connection pipe while the compressor is in operation with 3-way valve open.

This may cause abnormal pressure in the refrigeration cycle that leads to rupture and even injury.

For the air conditioner to operate satisfactorily, install it as outlined in this installation manual.

Connect the indoor unit and outdoor unit with the air conditioner piping and cable available standards parts.

This installation manual describes the correct connections using the installation set available from our standard parts.

Also, do not use an extension cable.

Do not purge the air with refrigerants but use a vacuum pump to vacuum the installation.

There is not extra refrigerant in the outdoor unit for air purging.

Use a vacuum pump for R410A exclusively.

Using the same vacuum pump for different refrigerants may damage the vacuum pump or the unit.

Use a clean gauge manifold and charging hose for R410A exclusively.

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 3-way valve open.

This may cause abnormal pressure in the refrigeration cycle that leads to rupture and even injury.

CAUTION

Read carefully all security information before use or install the air conditioner.

Do not attempt to install the air conditioner or a part of the air conditioner by yourself.

This unit must be installed by qualified personnel with a capacity certificate for handling refrigerant fluids. Refer to regulation and laws in use on installation place.

The installation must be carried out in compliance with regulations in force in the place of installation and the installation instructions of the manufacturer.

This unit is part of a set constituting an air conditioner. It must not be installed alone or with non-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 3mm for this unit.

The unit must be correctly earthed (grounded) and the supply line must be equipped with a differential breaker in order to protect the persons.

The units are not explosion proof and therefore should not be installed in explosive atmosphere.

This unit contains no user-serviceable parts. Always consult authorized service personnel to repairs.

When moving, consult authorized service personnel for disconnection and installation of the unit.

Children should be monitored to ensure they do not play with the device.

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.

Do not touch the aluminum fins of heat exchanger built-in the indoor or outdoor unit to avoid personal injury when you install or maintain the unit.

Do not place any other electrical products or household belongings under indoor unit or outdoor unit. Dripping condensation from the unit might get them wet, and may cause damage or malfunction of your property.

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2. ABOUT THE UNIT

2.1. Precautions for using R410A refrigerant

WARNING

Do not introduce any substance other than the prescribed refrigerant into the refrigeration cycle. If air enters the refrigeration cycle, the pressure in the refrigeration cycle will become abnormally high and cause the piping to rupture.

If there is a refrigerant leak, make sure that it does not exceed the concentration limit.

If a refrigerant leak exceeds the concentration limit, it can lead to accidents such as oxygen starvation.

Do not touch refrigerant that has leaked from the refrigerant pipe connections or other areas. Touching the refrigerant directly can cause frostbite.

If a refrigerant leak occurs during operation, immediately vacate the premises and thoroughly ventilate the area. If the refrigerant comes in contact with a flame, it produces a toxic gas.

The basic installation work procedures are the same as conventional refrigerant models.

However, pay careful attention to the following points:

•

•

Since the working pressure is 1.6 times higher than that of conventional refrigerant

(R22) models, some of the piping and installation and service tools are special. (See the table below.)

Especially, when replacing a conventional refrigerant (R22) model with a new refrigerant R410A model, always replace the conventional piping and flare nuts with the R410A piping and flare nuts.

Models that use refrigerant R410A have a different charging port thread diameter to prevent erroneous charging with conventional refrigerant (R22) and for safety.

Therefore, check beforehand. [The charging port thread diameter for R410A is 1/2

UNF 20 threads per inch.]

•

•

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

When charging the refrigerant, take into account the slight change in the composition of the gas and liquid phases. And always charge from the liquid phase where refrigerant composition is stable.

2.2. Special tools for R410A

WARNING

To install a unit that uses R410A refrigerant, use dedicated tools and piping materials that have been manufactured specifically for R410A use. Because the pressure of

R410A refrigerant is approximately 1.6 times higher than R22, failure to use dedicated piping material or improper installation can cause rupture or injury. Furthermore, it can cause serious accidents such as water leakage, electric shock, or fire.

Tool name

Gauge manifold

Changes

Pressure is high and cannot be measured with a conventional gauge. To prevent erroneous mixing of other refrigerants, the diameter of each port has been changed.

It is recommended the 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.

Charging hose

Vacuum pump

To increase pressure resistance, the hose material and base size were changed.

A conventional vacuum pump can be used by installing a vacuum pump adapter.

Gas leakage detector Special gas leakage detector for HFC refrigerant R410A.

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 valve or capillary tube may become blocked with contaminants.

As an air conditioner using R410A incurs pressure higher than when using conventional refrigerant, it is necessary to choose adequate materials.

Thicknesses of copper pipes used with R410A are as shown in the table. Never use copper pipes thinner than that in the table even when it is available on the market.

Thicknesses of Annealed Copper Pipes (R410A)

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]

0.80

0.80

0.80

1.00

1.20

2.3. 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.

Following installation parts are supplied. Use them as required.

Keep this 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

This manual

Description

1

Drain pipe

Drain cap

One-touch bush

1

2

2

For outdoor unit drain piping work

(May not be supplied, depending on the model.)

For power supply cable and connection cable installation

2.4. Operating range

Outdoor

Temperature

Cooling/Dry Mode

About -15 °C to 46 °C

Heating Mode

About -15 °C to 24 °C

3. INSTALLATION WORK

Make sure to obtain the customer’s approval for selecting and installing the outdoor unit.

3.1. Selecting an installation location

WARNING

Securely install the outdoor unit at a location that can withstand the weight of the unit.

Otherwise, the outdoor unit may fall and cause injury.

Be sure to install the outdoor unit as prescribed, so that it can withstand earthquakes and typhoons or other strong winds. Improper installation can cause the unit to topple or fall, or other accidents.

Do not install the outdoor unit near the edge of a balcony. Otherwise, children may climb onto the outdoor unit and fall off of the balcony.

CAUTION

Do not install the outdoor unit in the following areas:

• Area with high salt content, such as at the seaside. It will deteriorate metal parts, causing the parts to fail or the unit to leak water.

• Area filled with mineral oil or containing a large amount of splashed oil or steam, such as a kitchen. It will deteriorate plastic parts, causing the parts to fail or the unit to leak 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 containing equipment that generates electromagnetic interference. It will cause the control system to malfunction, preventing the unit from operating normally.

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 small animals may live. It may cause failure, smoke or fire if small animals enter and touch internal electrical parts.

Area where animals may urinate on the unit or ammonia may be generated.

Do not tilt the outdoor unit more than 3 degrees.

Install the outdoor unit in a well-ventilated location away from rain or direct sunlight.

If the outdoor unit must be installed in an area within easy reach of the general public, install as necessary a protective fence or the like to prevent their access.

Install the outdoor unit in a location that would not inconvenience your neighbors, as they could be affected by the airflow coming out from the outlet, noise, or vibration. If it must be installed in proximity to your neighbors, be sure to obtain their approval.

If the outdoor unit is installed in a cold region that is affected by snow accumulation, snow fall, or freezing, take appropriate measures to protect it from those elements.

To ensure a stable operation, install inlet and outlet ducts.

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CAUTION

Install the outdoor unit in a location that is away from exhaust or the vent ports that discharge vapor, soot, dust, or debris.

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.)

1 m or more

Branch switch and circuit breaker

1 m or more

Branch switch and circuit breaker

CAUTION

Observe the installation space specifications that are shown in the figures.

Keep the same space at rear air intake.

Provide the same space for the air intake at the rear of the outdoor unit.

If the installation is not performed according to the specifications, it could cause a short circuit and result in a lack of operating performance. As a result, the outdoor unit might easily be stopped by high-pressure protection.

Air intake

If children under 10 years old may approach the unit, take preventive measures so that they cannot reach the unit.

Keep the length of the piping of the indoor and outdoor units within the allowable range.

For maintenance purposes, do not bury the piping.

3.2. Drain installation

CAUTION

Perform drain work in accordance with this Manual, and ensure that the drain water is properly drained. If the drain work is not carried out correctly, water may drip down from the unit, wetting the furniture.

When the outdoor temperature is 0 °C or less, do not use the accessory drain pipe and drain cap. If the drain pipe and drain cap are used, the drain water in the pipe may freeze in extremely cold weather. (Reverse cycle model only)

•

•

As the drain water flows out of the outdoor unit during heating operation, install the drain pipe and connect it to a commercial 16 mm hose. (Reverse cycle model only)

When installing the drain pipe, plug all the holes other than the drain pipe mounting hole in the bottom of the outdoor unit with putty so there is no water leakage. (Reverse cycle model only)

(Unit : mm)

AIR

Drain cap mounting hole

Rear view

Installation methods not shown in the following examples are not recommended.

Performance may drop significantly.

3.3.1. Single outdoor unit installation

When the upward area is open (Unit : mm)

(1) Obstacles at rear only (2) Obstacles at rear and sides only

(3) Obstacles at front only

150

200

200

(4) Obstacles at front and rear only

300

1000 or more

150

1000 or more

When an obstruction is present also in the upward area (Unit : mm)

(1) Obstacles at rear and above only (2) Obstacles at rear, sides, and above only

1000

1500

51

439

623

Drain pipe mounting hole

Drain pipe mounting hole

Drain pipe

Base

3.3. Installation dimensions

CAUTION

The installation space shown in the following examples is based on an ambient temperature under cooling operation of 35 °C (DB) at the air intake of the outdoor unit.

Provide more space around the air intake than shown in the examples if the ambient temperature exceeds 35 °C (DB) or if the thermal load of all of the outdoor units exceeds the capacity.

Consider the transportation route, installation space, maintenance space, and access, and install the unit in a location with sufficient space for the refrigerant piping.

300

Max. 500

250

250

500

Max. 500

3.3.2. Multiple outdoor unit installation

•

•

• Provide at least 15 mm of space between the outdoor units if multiple units are installed.

When routing the piping from the side of an outdoor unit, provide space for the piping.

No more than 3 units must be installed side by side. When 3 units or more are arranged in a line, provide the space as shown in the following example when an obstruction is present also in the upward area .

When the upward area is open (Unit : mm)

(1) Obstacles at rear only (2) Obstacles at front only

300

1500 or more

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(3) Obstacles at front and rear only

Fig. B

500

1500 or more

When an obstruction is present also in the upward area (Unit : mm)

Obstacles at rear and above only

Front view

3.5. Installation

(Unit : mm)

132

50

AIR

650

Rear view

50

119

1500

1500

500

Max. 300

3.3.3. Outdoor units installation in multi row

(Unit : mm)

(1) Single parallel unit arrangement

(2) Multiple parallel unit arrangement

1000

600

150

2000 or more

Handle

Suction grille

4 - Φ 12 Hole

• Install 4 anchor bolts at the locations indicated with arrows in the above figure.

• To reduce vibration, do not install the unit directly on the ground. Install it on a secure base (such as concrete blocks).

• The foundation shall support the legs of the unit and have a width of 50 mm or more.

• Depending on the installation conditions, the outdoor unit may spread its vibration during operation, which may cause noise and vibration. Therefore, attach damping materials (such as damping pads) to the outdoor unit during installation.

• Install the foundation, making sure that there is enough space for installing the connection pipes.

• Secure the unit to a solid block using foundation bolts. (Use 4 sets of commercially available M10 bolts, nuts, and washers.)

• The bolts should protrude 20 mm.

(Refer to the figure below.)

• If overturning prevention is required, purchase the necessary commercially available items.

Bolt

Nut

Base

600

1500

500

3000 or more

3.4. Transporting the unit

Do not touch the fins.

Otherwise, personal injury could result.

WARNING

CAUTION

When carrying the unit, hold the handles on the right and left sides and be careful.

If the outdoor unit is carried from the bottom, hands or fingers may be pinched.

• Carry slowly in the manner as shown on “Fig. B” holding the handles “Fig. A” in right and left sides. (Be careful not to touch with hands or objects.)

• Be sure to hold the handles on the sides of the unit. Otherwise, the suction grilles on the sides of the unit may be deformed.

Fig. A

Suction grille

Handle

Fix securely with bolts on a solid block. (Use 4 sets of commercially available M10 bolt, nut and washer.)

4. PIPE SELECTION

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

Note:

Thicknesses of copper pipes used with 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.

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Thicknesses of Annealed Copper Pipes (R410A)

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

1.0

1.2

4.2. Protection of pipes

Protect the pipes to prevent the entry of moisture and dust.

Especially, pay attention when passing the pipes through a hole or connecting the end of a pipe to the outdoor unit.

Location

Outdoor

Indoor

Working period

1 month or more

Less than 1 month

-

Protection method

Pinch pipes

Pinch or tape pipes

Pinch or tape pipes

4.3. Refrigerant pipe size and allowable piping length

CAUTION

Keep the piping length between the indoor unit and outdoor unit within the allowable tolerance.

Pipe diameter <Liquid/Gas>

(Standard)

Max. piping length (L1)

Min. piping length (L1)

Max. height difference (H1)

<Indoor unit to outdoor unit>

View (Example)

[mm (in.)]

[m]

[m]

[m]

9.52 (3/8) / 15.88 (5/8)

75 *1

5

30

L1

H1

Fig. A

Slit

Service panel

Fig. B

Front connection

Slit

Lateral connection

Bottom connection

(No. 1)

Fig. C

Rear connection

Bottom connection

(No. 2)

*1: For the standard pipe diameter.

4.4. Connectable pipe diameter and max. piping length

The figures enclosed by a thick-lined frame indicate the standard pipe diameter and max. piping length.

Pipe diameter

[mm (in.)]

Piping length

[m (m)]

Liquid pipes

Gas pipes

Max. piping length < L1 >

(Pre-charge length)

*1

9.52 (3/8)

15.88

(5/8)

19.05

(3/4)

75

[30]

50

[30]

12.70 (1/2)

15.88

(5/8)

35

[15]

19.05

(3/4)

35

[15]

*1: Refer to “View” in the table of “4.3. Refrigerant pipe size and allowable piping length”.

5. PIPE INSTALLATION-1

5.1. Opening a knock out hole

CAUTION

Be careful not to deform or scratch the panel while opening the knock out holes.

To protect the piping insulation after opening a knock out hole, remove any burrs from the edge of the hole. It is recommended to apply rust prevention paint to the edge of the hole.

• Pipes can be connected from 4 directions, front, lateral side, rear side and bottom.

(Fig. A)

•

•

When connecting at the bottom, remove the service panel and piping cover on the front of the outdoor unit, and open the knock out hole provided at the bottom corner of the piping outlet.

It can be installed as shown on “Fig. B” cutting out the 2 slits as indicated on “Fig. C”.

(When cutting slits, use a steel saw.)

5.2. 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. If a pipe is brazed without applying nitrogen gas, an oxidation film will be created.

Pressure regulating valve

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

Cap

Nitrogen gas pressure: 0.02 MPa

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

Nitrogen gas

Brazing area

For brazing material, use phosphor copper that does not require flux. Do not use flux to braze pipes. If the flux is the chlorine type, it will cause the pipes to corrode.

Furthermore, if the flux contains fluoride, it will adversely affect the refrigerant pipe system such as by degrading the refrigerant.

If fluoride is contained, quality of refrigerant deteriorates and affects the refrigerant piping system.

5.3. Flare connection (pipe connection)

CAUTION

Do not use mineral oil on a flared part. Prevent mineral oil from getting into the system as this would reduce the lifetime of the units.

While welding the pipes, be sure to blow dry nitrogen gas through them.

The maximum lengths of this product are shown in the table. If the units are further apart than this, correct operation cannot be guaranteed.

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5.3.1. Flaring

Use special pipe cutter and flare tool exclusive for R410A.

(1) Cut the connection pipe to the necessary length with a pipe cutter.

(2) Hold the pipe downward so that the cuttings will not enter the pipe and remove any burrs.

(3) Insert the flare nut (always use the flare nut attached to the indoor and outdoor units respectively) onto the pipe and perform the flare processing with a flare tool.

Leakage of refrigerant may result if other flare nuts are used.

(4) Protect the pipes by pinching them or with tape to prevent dust, dirt, or water from entering the pipes.

Check if [L] is flared uniformly and is not cracked or scratched.

B

L

Die

A

Pipe

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)

Dimension A [mm]

Flare tool for R410A, clutch type

0 to 0.5

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)

9.1

13.2

16.6

19.7

24.0

When using conventional flare tools to flare R410A pipes, the dimension A should be approximately 0.5 mm more than indicated in the table (for flaring with R410A flare tools) to achieve the specified flaring. Use a thickness gauge to measure the dimension A.

Width across flats 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)

Width across flats of Flare nut [mm]

17

22

26

29

36

5.3.2. Bending pipes

CAUTION

To prevent breaking of the pipe, avoid sharp bends. Bend the pipe with a radius of curvature of 100 mm to 150 mm.

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

•

•

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

Do not bend the pipes at an angle of more than 90°.

• When pipes are repeatedly bent 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.

5.3.3. Pipe connection

CAUTION

Be sure to install the pipe against the port on the indoor unit and the outdoor unit correctly. If the centering is improper, the flare nut cannot be tightened smoothly. If the flare nut is forced to turn, the threads will be damaged.

Do not remove the flare nut from the outdoor unit pipe until immediately before connecting the connection pipe.

After installing the piping, make sure that the connection pipes do not touch the compressor or outer panel. If the pipes touch the compressor or outer panel, they will vibrate and produce noise.

(1) Detach the caps and plugs from the pipes.

(2) Center the pipe against the port on the outdoor unit, and then turn the flare nut by hand.

(3) Tighten the flare nut of the connection pipe at the outdoor unit valve connector.

3-way valve (Liquid)

3-way valve (Gas)

Flare nut Flare nut

Connection pipe

(Liquid)

Connection pipe

(Gas)

(4) After tightening the flare nut by hand, use a torque wrench to fully tighten it.

CAUTION

Hold the torque wrench at its grip, keeping it in a right angle with the pipe, in order to tighten the flare nut correctly.

•

•

Outer panel may be distorted if fastened only with a wrench. Be sure to fix the elementary part with a spanner and fasten with a wrench (refer to below diagram).

Do not apply force to the blank cap of the valve or hang a wrench, etc., on the cap. It may cause leakage of refrigerant.

Blank cap

Flare nut

Torque wrench

90°

Holding wrench

Torque wrench

Flare nut

[mm (in.)]

6.35 (1/4) dia.

9.52 (3/8) dia.

12.70 (1/2) dia.

15.88 (5/8) dia.

19.05 (3/4) dia.

Tightening torque

[N·m (kgf·cm)]

16 to 18 (160 to 180)

32 to 42 (320 to 420)

49 to 61 (490 to 610)

63 to 75 (630 to 750)

90 to 110 (900 to 1100)

5.3.4. Handling precautions for the valves

•

•

Mounted part of Blank cap is sealed for protection.

Fasten blank cap tightly after opening valves.

Blank cap

[mm (in.)]

6.35 (1/4)

9.52 (3/8)

12.70 (1/2)

15.88 (5/8)

19.05 (3/4)

Table A

Tightening torque

[N·m (kgf·cm)]

20 to 25 (200 to 250)

20 to 25 (200 to 250)

25 to 30 (250 to 300)

30 to 35 (300 to 350)

35 to 40 (350 to 400)

Operating the valves

• Use a hexagon wrench (size 4 mm).

•

•

Opening (1) Insert the hexagon wrench into the valve shaft, and turn it counterclockwise.

(2) Stop turning when the valve shaft can no longer be turned.

(Open position)

Closing (1) Insert the hexagon wrench into the valve shaft, and turn it clockwise.

(2) Stop turning when the valve shaft can no longer be turned.

(Closed position)

Opening direction

Opening direction

Hexagon wrench

Seal (blank cap installation portion)

Liquid pipe

Gas pipe

5.4. Sealing test

WARNING

Before operating the compressor, install the pipes and securely connect them.

Otherwise, if the pipes are not installed and if the valves are open when the compressor operates, air could enter the refrigeration cycle. If this happens, the pressure in the refrigeration cycle will become abnormally high and cause damage or injury.

After the installation, make sure there is no refrigerant leakage. If the refrigerant leaks into the room and becomes exposed to a source of fire such as a fan heater, stove, or burner, it produces a toxic gas.

Do not subject the pipes to strong shocks during the sealing test. It can rupture the pipes and cause serious injury.

CAUTION

Do not block the walls and the ceiling until the sealing test and the charging of the refrigerant gas have been completed.

For maintenance purposes, do not bury the piping of the outdoor unit.

•

•

After connecting the pipes, perform a sealing test.

Make sure that the 3-way valves are closed before performing a sealing test.

•

•

•

•

•

•

•

Pressurize nitrogen gas to 4.15 MPa to perform the sealing test.

Add nitrogen gas to both the liquid pipes and the gas pipes.

Check all flare connections and welds. Then, check that the pressure has not decreased.

Compare the pressures after pressurizing and letting it stand for 24 hours, and check that the pressure has not decreased.

* When the outdoor air temperature changes 5 °C, the test pressure changes

0.05 MPa. If the pressure has dropped, the pipe joints may be leaking.

If a leak is found, immediately repair it and perform the sealing test again.

After completing the sealing test, release the nitrogen gas from both valves.

Release the nitrogen gas slowly.

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5.5. Vacuum process

CAUTION

Perform a refrigerant leakage test (air tightness test) to check for leaks using nitrogen gas while all valves in the outdoor unit are closed. (Use the test pressure indicated on the nameplate.)

Be sure to evacuate the refrigerant system using a vacuum pump.

The refrigerant pressure may sometimes not rise when a closed valve is opened after the system is evacuated using a vacuum pump. This is caused by the closure of the refrigerant system of the outdoor unit by the electronic expansion valve. This will not affect the operation of the unit.

If the system is not evacuated sufficiently, its performance will drop.

Use a clean gauge manifold and charging hose that were designed specifically for use with R410A. Using the same vacuum equipment for different refrigerants may damage the vacuum pump or the unit.

Do not purge the air with refrigerants, but use a vacuum pump to evacuate the system.

(1) Check that the valves are closed by removing the blank caps from the gas and liquid pipes.

(2) Remove the charging port cap, and connect the gauge manifold and the vacuum pump to the charging valve with the service hoses.

(3) Vacuum the indoor unit and the connecting pipes until the pressure gauge indicates

–0.1 MPa (–76 cmHg).

(4) When –0.1 MPa (–76 cmHg) is reached, operate the vacuum pump for at least

60 minutes.

(5) Disconnect the service hoses and fit the charging port cap to the charging valve to the specified torque. (Refer to below table)

(6) Remove the blank caps, and fully open the 3-way valves with a hexagon wrench

[Torque: 6 to 7 N·m (60 to 70 kgf·cm)].

(7) Tighten the blank caps of the 3-way valve to the specified torque. (Refer to Table A on page 6.)

Charging port cap

Tightening torque [N·m (kgf·cm)]

10 to 12 (100 to 120)

Service hose with valve core

Charging port

Charging port cap

Blank cap 3-way valve

Connecting pipe

Gauge manifold

Hexagon wrench

Use a 4 mm

Vacuum pump

Outdoor unit

Service hose

Pressure regulating valve

Pressure gauge Nitrogen

Indoor unit Vacuum pump

5.6. Additional charging

WARNING

When moving and installing the air conditioner, do not mix gas other than the specified refrigerant R410A inside 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.

CAUTION

After vacuuming the system, add refrigerant.

Do not reuse recovered refrigerant.

When charging the refrigerant R410A, always use an electronic scales for refrigerant charging (to measure the refrigerant by weight). Adding more refrigerant than the specified amount will cause a malfunction.

CAUTION

When charging the refrigerant, take into account the slight change in the composition of the gas and liquid phases, and always charge from the liquid phase side whose composition is stable. Adding refrigerant through the gas pipe will cause a malfunction.

Check if the steel cylinder has a siphon installed or not before filling. (There is an indication “with siphon for filling liquid” on the steel cylinder.)

Filling method for cylinder with siphon

R410A

Gas Set the cylinder vertical and fill with the liquid.

(Liquid can be filled without turning bottom up with the siphon inside.)

Liquid

Filling method for other cylinders

R410A

Gas Turn bottom up and fill with liquid.

(Be careful to avoid turning over the cylinder.)

Liquid

Be sure to use the special tools for R410A for pressure resistance and to avoid mixing of impure substances.

If the units are further apart than the maximum pipe length, correct operation can not be guaranteed.

Make sure to back closing valve after refrigerant charging. Otherwise, the compressor may fail.

Minimize refrigerant release to the air. Excessive release is prohibited under the Freon

Collection and Destruction Law.

5.6.1. For Pre-charge lengths

Refrigerant pipe size

Standard

Size up (Liquid pipe)

Piping length (L) *Pre-charge [m]

30

15

5.6.2. If additional refrigerant is required

• When the piping is longer than pre-charge length, additional charging is necessary.

• For the additional amount, see the table below.

Additional charging amount

Single type

L1 (*1) > Pre-charge length

Refrigerant pipe size

[mm (in.)]

Piping length

~30 m 40 m 50 m 60 m 70 m g/m

Liquid

Gas

9.52 (3/8)

15.88 (5/8)

None 500 g 1,000 g 1,500 g 2,000 g 50 g/m

~30 m 40 m 50 m g/m

Liquid

Gas

9.52 (3/8)

19.05 (3/4)

None 500 g 1,000 g 50 g/m

~15 m 25 m 35 m g/m

Liquid

Gas

12.70 (1/2)

15.88 (5/8)

19.05 (3/4)

None 1,000 g 2,000 g 100 g/m

*1: Refer to “View” in the table of “4.3. Refrigerant pipe size and allowable piping length”.

s

6. ELECTRICAL WIRING

d

6.1. Notes for electrical wiring

WARNING

Wiring connections must be performed by a qualified person in accordance with the specifications. The voltage rating for this product is 400 V at 50 Hz. It should be operated within the range of 342 to 456 V.

Before connecting the wires, make sure the power supply is OFF.

Use a dedicated power supply circuit. Insufficient power capacity in the electrical circuit or improper wiring may cause electric shock or fire.

Install a breaker at the power supply for each outdoor unit. Improper breaker selection can cause electric shock or fire.

Install a leakage circuit breaker in accordance with the related laws and regulations. An improperly installed electrical box cover can cause serious accidents such as electric shock or fire through exposure to dust or water.

A circuit breaker is installed in the permanent wiring. Always use a circuit that can trip all the poles of the wiring and has an isolation distance of at least 3 mm between the contacts of each pole.

Use designated cables and power cables. Improper use may cause electric shock or fire by poor connection, insufficient insulation, or over current.

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9379069403-02_IM.indb 7 18-Jul-18 13:50:16

WARNING

Do not modify power cable, use extension cable or branch wiring. Improper use may cause electric shock or fire by poor connection, insufficient insulation or over current.

Connect the connector cable securely to the terminal. Check no mechanical force bears on the cables connected to the terminals. Faulty installation can cause a fire.

Use crimp-type terminals and tighten the terminal screws to the specified torques, otherwise, abnormal overheating may be produced and possibly cause serious damage inside the unit.

Make sure to secure the insulation portion of the connector cable with the cable clamp.

Damaged insulation can cause a short circuit.

Fix cables so that cables do not make contact with the pipes (especially on high pressure side). Do not make power supply cable and transmission cable come in contact with valves (Gas).

Never install a power factor improvement condenser. Instead of improving the power factor, the condenser may overheat.

Be sure to perform the earthing (grounding) work.

Do not connect earthing (grounding) wires to a gas pipe, water pipe, lightning rod or earthing (grounding) wire for a telephone.

•

•

•

Connection to a gas pipe may cause a fire or explosion if gas leaks.

Connection to a water pipe is not an effective earthing (grounding) method if PVC pipe is used.

Connection to the earthing (grounding) wire of a telephone or to a lightning rod may cause a dangerously abnormal rise in the electrical potential if lightning strikes.

Improper earthing (grounding) work can cause electric shocks.

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

CAUTION

The primary power supply capacity is for the air conditioner itself, and does not include the concurrent use of other devices.

Do not start operation until the refrigerant is charged completely. The compressor will fail if it is operated before the refrigerant piping charging is complete.

Transmission cable between indoor unit and outdoor unit is 230 V.

Be sure not to remove thermistor sensor etc. from power wiring and connection wiring.

Compressor may fail if operated while removed.

Start wiring work after closing branch switch and over current breaker.

Use an earth leakage breaker that is capable of handling high frequencies. Because the outdoor unit is inverter controlled, a high-frequency earth leakage breaker is necessary to prevent a malfunction of the breaker itself.

When using an earth leakage breaker that has been designed solely for earth (ground) fault protection, be sure to install a fuse-equipped switch or circuit breaker.

Do not connect the AC power supply to the transmission line terminal board. Improper wiring can damage the entire system.

Do not use crossover power supply wiring for the outdoor unit.

If the temperature surrounding the breaker is too high, the amperage at which the breaker cuts out may decrease.

How to connect wiring to the terminal

Caution when wiring cable

When stripping off the coating of a lead wire, always use a special tool such as a wire stripper. If there is no special tool available, carefully strip the coating with a knife etc.

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

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

Strip : 10 mm

Crimp-type terminal

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

M4 screw

M5 screw

Tightening torque

[N·m (kgf·cm)]

1.2 to 1.8 (12 to 18)

2.0 to 3.0 (20 to 30)

6.2. Selecting circuit breaker and wiring

CAUTION

Be sure to install a breaker with specified capacity.

Before the electrical working, confirm electrical standards and regulations in each country, region, or installing place. Then select appropriate cables and breakers that comply with them.

Decide the diameter of wire referring to below table “Breaker and wiring specifications” in accordance with local and national codes.

Breaker and wiring specifications

Breaker capacity

[A]

16

Power supply cable

Conductor size

[mm²]

2.5 (Min.)

Transmission cable

Conductor size

[mm²]

1.5 (Min.)

*

Max. length

[m]

75

•

• drop is 2% or more.

Use confirmed cable with type 60245 IEC 57.

Install a circuit breaker with a contact gap of at least 3 mm in all poles nearby the units.

(Both indoor units and outdoor units)

6.3. Knock out holes for wiring

CAUTION

Be careful not to deform or scratch the panel while opening the knock out holes.

When cables are routed from the unit, a protection sleeve for the conduits can be inserted at the knock out hole.

If you do not use a wire conduit, be sure to protect the wires to prevent the edge of the knock out hole from cutting the wires.

It is recommended to apply anti-rust paint to the edge of the knock out hole.

•

•

Knock out holes are provided for wiring. (Fig. A)

Knock out holes are provided 2 each in the same size in front, lateral and rear sides.

(Fig. B)

Fig. A

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.

Screw with special washer

Screw with special washer

Wire

Crimp-type terminal

Crimp-type terminal

Terminal blocks

Wire

Fig. B

Installation method of One-touch bush

Please fix the One-touch bush (accessory) as shown in the figure below.

Front connection Lateral connection Rear connection

(Pipe cover front)

(Pipe cover rear)

One-touch cable bush

(Accessories)

One-touch cable bush

(Accessories)

One-touch cable bush

(Accessories)

Note : Please ensure that the power cable and interconnecting cables are not installed through the same cable bush hole opening. They must be installed into the two separate hole openings to prevent damage to the cable.

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6.4. Wiring method

6.4.1. Connection diagrams

POWER SUPPLY

(R) (S) (T) N

EARTH

(GROUND)

Control line

Power line

3

2

1

N

L3

L2

L1

3

2

1

EARTH

(GROUND)

Indoor unit side terminal

Earthing (Grounding) line

EARTH

(GROUND)

Outdoor unit side terminal

6.4.2. Connection cable preparation

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

40 mm

Power supply cable or

Transmission cable

Earth (Ground) wire

60 mm or more

6.4.3. Wiring procedure

(1) Remove the service panel cover, insulation sheet and connect the wires to the terminal in accordance with the terminal nameplate. (Fig. A, Fig. B)

Fig. A

Direction of the service panel removal

(2) After connecting the wires, use cable clips to secure the wires. (Fig. B)

• Connect the wires without applying excessive tension.

Fig. B

Control box

Terminal blocks

Cable clip

Firmly secure the cable clips so that the wire terminals will not receive external stress.

Terminal blocks

Service panel

Cable clip

Use the specified wire type and connect the wires securely.

(3) Secure the cables using the cable clips under the terminal blocks, and then secure the cables using the cable clips attached to the base of the valves.

Cable clip

(4) Be sure to install the insulation sheet after the wiring is complete.

s

7. PIPE INSTALLATION-2

WARNING

Install the insulated pipes so that they do not touch the compressor.

7.1. Installing insulation

• Use an insulation on the refrigerant pipes to prevent condensation and dripping.

(Fig. A)

• Determine the thickness of the insulation material by referring to Table A.

Table A, Selection of insulation

(for using an insulation material with equal heat transmission rate or below

0.040 W/(m·k))

Pipe

Relative humidity diameter

[mm (in.)]

6.35 (1/4)

9.52 (3/8)

12.70 (1/2)

15.88 (5/8)

19.05 (3/4)

70%

9

10

10

10 or more

8

Insulation material

Minimum thickness [mm]

75% or more

10

80% or more

13

11

12

12

13

14

15

16

16

85% or more

17

18

19

20

21

If the ambient temperature and relative humidity exceed 32 °C, increase the level of heat insulation for the refrigerant pipes.

7.2. Filling with putty

WARNING

Fill the piping holes with putty (supplied locally) to avoid any gap (Fig. A). If small animals such as insects enter the external unit, a short circuit may be caused near electrical components in the service panel.

If the outdoor unit is installed at a level that is higher than the indoor unit, the water that has condensed in the 3-way valve of the outdoor unit could travel to the indoor unit.

Therefore, use putty in the space between the pipe and the insulation to prevent the entry of water.

Fig. A d

Insulation

Putty

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8. HOW TO OPERATE DISPLAY UNIT

8.1. Various setting methods

WARNING

Never touch electrical components such as the terminal blocks or reactor except the switch on the display board. It may cause a serious accident such as electric shock.

CAUTION

Once refrigerant charging is completed, be sure to open the valve prior to performing the local settings. Otherwise, the compressor may fail.

Discharge any static electricity from your body before touching the push switches. Never touch any terminal or pattern of any parts on the control board.

• The positions of the switches on the outdoor unit control board are shown in the figure below.

Reactors

Terminal blocks

• Various settings can be adjusted by changing DIP switches and push switches on the board of the outdoor unit.

LED display

DIP switch

• The printed characters for the LED display are shown below.

LED display part

(1) (2) (3) (4) (5) (6)

Push switches

SW1 SW2 SW3 SW4 SW5 SW6

8.2. Description of display

Display lamp

(1) POWER/MODE

(2) ERROR

(3) TEST RUN

(L1)

(4) PUMP DOWN

(L2)

(5) LOW NOISE MODE

(L3, L4)

(6) PEAK CUT

(L5, L6, L7)

Green

Red

Orange

Orange

Orange

Orange

Function or operation method

Lights on while power on Local setting in outdoor unit or error code is displayed with blink.

Blinks during abnormal air-conditioner operation.

Lights on during test operation.

Lights on during pump down operation.

Lights on during “Low noise” function when local setting is activated.

(Lighting pattern of L3 and L4 indicates low noise level) _ Refer to “9. LOCAL

SETTING”.

Lights on during “Peak cut” function when local setting is activated.

(Lighting pattern of L5, L6 and L7 indicates peak cut level) _ Refer to “9. LOCAL

SETTING”.

SW1

SW2

SW3

SW4

SW5

SW6

Switch

DIP switch

Push switch

Push switch

Push switch

Push switch

Push switch

Function or operation method

For selecting cooling or heating during test operation.

Positions 2 to 4 of DIP switch are not used.

To switch between “Local setting” and “Error code display”.

To switch between the individual “Local settings” and the “Error code displays”.

To fix the individual “Local settings”, “Test run” and the “Error code displays”.

EXIT

To start the pump down operation.

• DIP switches 1 to 4 at shipment from the factory are set as follows.

DIP switch

1

COOL

2

OFF

3

OFF

4

OFF s

9. LOCAL SETTING

CAUTION

Discharge the static electricity from your body before setting up the switches.

Never touch the terminals or the patterns on the parts that are mounted on the board.

d

9.1. Low noise mode (Local work)

Outdoor unit may be operated with lower noise than normal operation when following below local work.

• Low noise operation is available by installation of an additional commercially available timer or contact input from the ON-OFF switch to the CN19 connector (an external contact input sold separately) on the control board of the outdoor unit.

* Performance may be deficient depending on outdoor temperature or conditions etc.

< Example of circuit diagram >

Remote control panel

Adapter for external input

Outdoor unit control board

Power supply

Red

1

CN19

1

SW1 White

2 2

Black

3 3

Local purchase

(1) Make a circuit of the above figure with an “Adapter for external input” sold separately.

(2) Low noise operation can be set up with the operation of external display portion.

SW1...ON

Level 1

(Shipment condition)

Level 2

SW1...OFF

Normal operation

9379069403-02_IM.indb 10

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18-Jul-18 13:50:26

9.1.1. Setting for low noise

LED display part

SW2 SW3 SW4 SW5

(1) Switch to “Local setting mode” by pressing MODE switch (SW2) for 3 seconds or more.

(2) Confirm POWER/MODE LED blinks 9 times, and press ENTER switch (SW4).

POWER

MODE

Blinks

(9 times)

ERROR

TEST

RUN

PUMP

DOWN

LOW NOISE PEAK CUT

(L1) (L2) (L3) (L4) (L5) (L6) (L7)

Sign “ ” : Lights off

(3) Press SELECT switch (SW3), and adjust LED display as shown below. (Current setting is displayed)

TEST

RUN

PUMP

DOWN

LOW NOISE

(L1) (L2) (L3) (L4)

LOW NOISE

MODE

Blink

(4) Press ENTER switch (SW4).

TEST

RUN

PUMP

DOWN

LOW NOISE

(L1) (L2) (L3) (L4)

LOW NOISE

MODE

Sign “ ” : Lights on

(5) Press SELECT switch (SW3), and adjust LED display as shown in below figure.

Level 1

Level 2

PEAK CUT

(L5) (L6) (L7)

Blink

Blink

(6) Press ENTER switch (SW4) and fix it.

PEAK CUT

(L5) (L6) (L7)

Level 1

Level 2

(7) Return to “Operating status display (Normal operation)” by pressing EXIT switch

(SW5).

In case of missing how many times SELECT and ENTER switch are pressed, restart from the beginning of operation procedure after returning to “Operation status display

(normal operation)” by pressing the EXIT switch once.

9.2. Peak cut mode (Local work)

Efficient operation while reducing power supply and power consumption with below local work.

• Peak cut function can be effective with contact installation of an additional ON-OFF switch to the CN19 connector on the outdoor control board.

< Example of circuit diagram >

Remote control panel

Power supply

SW2

Adapter for external input

Red

White

1

2

CN19

Outdoor unit control board

1

2

Black

3 3

Local purchase

(1) Make a circuit like above figure using an

“Adapter external input” sold separately.

(2) Set a restriction for below power consumption (compared with the rated consumption). Refer to “8. HOW TO

OPERATE DISPLAY UNIT ” for settings.

SW2...ON

Level 1 : 0% (Stop)

Level 2 : 50%

Level 3 : 75%

Level 4 : 100%

(Shipment condition)

SW2...OFF

Normal operation

9.2.1. Setting for peak cut

LED display part

SW2 SW3 SW4 SW5

(1) Switch to “Local setting mode” by pressing MODE switch (SW2) for 3 seconds or more.

(2) Confirm POWER/MODE LED blinks 9 times, and press ENTER switch (SW4).

POWER

MODE

Blinks

(9 times)

ERROR

TEST

RUN

PUMP

DOWN

LOW NOISE PEAK CUT

(L1) (L2) (L3) (L4) (L5) (L6) (L7)

Sign “ ” : Lights off

(3) Press SELECT switch (SW3), and adjust LED display as shown below. (Current setting is displayed)

TEST

RUN

PUMP

DOWN

LOW NOISE

(L1) (L2) (L3) (L4)

PEAK CUT

MODE

Blink

(4) Press ENTER switch (SW4).

TEST

RUN

PUMP

DOWN

LOW NOISE

(L1) (L2) (L3) (L4)

PEAK CUT

MODE

Sign “ ” : Lights on

(5) Press SELECT switch (SW3), and adjust LED display as shown in below figure.

0% of rated input ratio

50% of rated input ratio

75% of rated input ratio

100% of rated input ratio

PEAK CUT

(L5) (L6) (L7)

Blink

Blink

Blink Blink

Blink

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9379069403-02_IM.indb 11 18-Jul-18 13:50:27

(6) Press ENTER switch (SW4) and fix it.

PEAK CUT

(L5) (L6) (L7)

0% of rated input ratio

50% of rated input ratio

75% of rated input ratio

100% of rated input ratio

(7) Return to “Operating status display (Normal operation)” by pressing EXIT switch

(SW5).

When pressed number is lost during operation, restart from the beginning of operation procedure after returning to “Operation status display (normal operation)” by pressing the EXIT switch once.

s

10. TEST RUN

CAUTION

Always turn on the power 6 hours prior to the start of the operation in order to protect the compressor.

d

10.1. Check items before performing the test run

• Make sure to perform the test run.

• Before performing the test run, be sure to check the following points.

(1) Is gas leaking?

Check connection of each pipe (flare connection part, brazing part).

(2) Is a breaker installed to the power cable of the outdoor unit?

(3) Has each cable been securely connected to the terminal according to the specifications?

(4) Are the 3-way valves (gas pipes and liquid pipes) of the outdoor units open?

(5) Has the power been supplied to the unit for at least 6 hours?

(6) Has the necessary local setting been done?

(7) Check insulation resistance of 1 MΩ or more using a 500 V mega tester.

• If no problems are found with the above items, perform the test run according to “Test run method”.

• If any problems are found, immediately resolve the problem and re-check the items.

10.2. Test run method

CAUTION

If the test run is performed for 1 outdoor unit in a group control system installation, the test run will also be performed for the other units. Therefore, make sure that all of the units have been installed before starting a test run.

(Group control system installation described in “SPECIAL INSTALLATION METHODS” in the installation manual of the indoor unit.)

• Operate ENTER (TEST RUN) switch on the display board by the following procedure.

LED display part

(3) Press ENTER (TEST RUN) switch for more than 3 seconds.

POWER

MODE

ERROR

TEST

RUN

PUMP

DOWN

LOW NOISE PEAK CUT

(L1) (L2) (L3) (L4) (L5) (L6) (L7)

TEST RUN LED will light on.

• If the compressor is operating at starting the test run, the compressor will stop and, after a while, the test run will start.

• Either of the above LOW NOISE or PEAK CUT LED will light on during the test run if local setting function is selected.

(4) Confirm operating status.

(5) Press ENTER (TEST RUN) switch again.

POWER

ERROR

MODE

TEST

RUN

PUMP

DOWN

LOW NOISE PEAK CUT

(L1) (L2) (L3) (L4) (L5) (L6) (L7)

TEST RUN LED lights off, and TEST RUN stops.

• Test run will finish after about 60 minutes automatically. At the same time, TEST RUN

LED will light off.

• Test run may be stopped before operating for 60 minutes if an error occurs after a starting test run. s

11. PUMP DOWN

d

WARNING

Never touch electrical components such as the terminal blocks or reactor except the switch on the display board. It may cause a serious accident such as electric shock.

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 rupture and even injury.

CAUTION

Perform the pump down operation before disconnecting any refrigerant pipe or electric cable.

Collect refrigerant from the service port or the 3-way valve if pump down cannot be performed.

In case of a group control system installation, do not turn the power off pump down is completed in all outdoor units.

(Group control system installation described in “SPECIAL INSTALLATION METHODS” in the installation manual of the indoor unit.)

Operate PUMP DOWN switch on the display board in the manner described below.

LED display part

PUMP DOWN switch

Operation mode

Upper : HEAT

Lower : COOL

ENTER (TEST RUN) switch

10.2.1. Operating procedures for the test run

(1) Check the 3-way valves (both at the liquid side and gas side) are opened.

(2) Set the operation mode to “COOL” or “HEAT”.

POWER

ERROR

MODE

TEST

RUN

PUMP

DOWN

LOW NOISE PEAK CUT

(L1) (L2) (L3) (L4) (L5) (L6) (L7)

•

•

In the first test run, be sure to set the operation mode to “COOL”.

The operation mode cannot be switched between “COOL” and “HEAT” during the test run. To switch the operation mode between “COOL” and “HEAT”, stop the test run, switch the operation mode, and then start the test run again.

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Reactors

Service hose

Charging port

Terminal blocks

Service port

(6) LED display changes after 1 minute as shown in the figure below.

POWER

MODE

ERROR

TEST

RUN

PUMP

DOWN

LOW NOISE PEAK CUT

(L1) (L2) (L3) (L4) (L5) (L6) (L7)

Fans and compressor stop automatically.

If the pump down is successfully completed (the above LED display is shown), the outdoor unit remains stopped until the power is turned off.

(7) Turn the power off.

POWER

MODE

ERROR

TEST

RUN

PUMP

DOWN

LOW NOISE PEAK CUT

(L1) (L2) (L3) (L4) (L5) (L6) (L7)

PUMP DOWN is completed.

Service port cap

Charging port cap

3-way valve

Service hose

11.1. Preparation for pump down

Confirm that the power is off, and then open the service panel.

11.2. Pump down procedure

(1) Check the 3-way valves (both at the liquid side and gas side) are opened.

(2) Turn the power on.

POWER

ERROR

MODE

TEST

RUN

PUMP

DOWN

LOW NOISE PEAK CUT

(L1) (L2) (L3) (L4) (L5) (L6) (L7)

(3) Press PUMP DOWN switch for 3 seconds or more after 3 minutes after power on.

POWER

MODE

ERROR

TEST

RUN

PUMP

DOWN

LOW NOISE PEAK CUT

(L1) (L2) (L3) (L4) (L5) (L6) (L7)

LED display lights on as shown in the above figure, and the fans and the compressor start operating.

(4) LED display will change as shown below about 3 minutes after the compressor starts. Fully close the 3-way valve on the liquid pipe side at this stage.

POWER

MODE

ERROR

TEST

RUN

PUMP

DOWN

LOW NOISE PEAK CUT

(L1) (L2) (L3) (L4) (L5) (L6) (L7)

• If the valve on the liquid pipe side is not closed, the pump down cannot be performed.

(5) When LED display changes as shown in the below figure, close the 3-way valve on the gas pipe side tightly.

POWER

MODE

ERROR

TEST

RUN

PUMP

DOWN

LOW NOISE PEAK CUT

(L1) (L2) (L3) (L4) (L5) (L6) (L7)

If the valve on the gas pipe side is not closed, refrigerant may flow into the piping after the compressor stops.

Step (4)

Closing direction

Step (5)

Closing direction

• When starting the operation after completion of the pump down, turn the power off, and then open the 3-way valves. Wait 3 minutes, turn the power on and perform a test run in the “COOL” operation mode.

12. ERROR CODE DISPLAY

When an error occurs, “short-press” the ENTER switch once. The number of blinks of the

LED indicates the type of error.

12.1. How to check error code

12.1.1. Display when an error occurs

POWER

MODE

ERROR

Blinks

(Hi-speed)

TEST

RUN

PUMP

DOWN

LOW NOISE PEAK CUT

(L1) (L2) (L3) (L4) (L5) (L6) (L7)

Check that the ERROR LED blinks, and then short-press the ENTER switch once.

Hexagon wrench

Liquid pipe

Gas pipe

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12.2. Error code check table

POWER

MODE

ERROR

(2)

(2)

(2)

(2)

(2)

(2)

(2)

(2)

(2)

(2)

(2)

(2)

(2)

(2)

(2)

(2)

(2)

(2)

(2)

(2)

(2)

(2)

(2)

(2)

(2)

(2)

(2)

(2)

(2)

(2)

(2)

(2)

(2)

(9)

(9)

(9)

(10)

(8)

(9)

(9)

(9)

(10)

(10)

(7)

(7)

(8)

(8)

(7)

(7)

(7)

(7)

(6)

(6)

(6)

(7)

(6)

(6)

(6)

TEST

RUN

(L1)

(1)

(1)

(2)

(5)

(6)

(6)

(6)

(6)

Display mode : Lights on

: Lights off

: Blink (0.5s Lights on / 0.5s Lights off)

( ) : Number of flashing

(7)

(8)

( 9 )

(1)

(6)

(4)

(5)

(5)

(3)

(5)

(7)

(7)

(4)

(6)

(2)

(3)

(3)

(4)

(4)

(5)

(8)

(1)

(2)

(3)

(4)

PUMP

DOWN

(L2)

(1)

(1)

(2)

(15)

(1)

(1)

(2)

(2)

LOW NOISE

(L3) (L4) (L5)

PEAK CUT

(L6) (L7)

Description

Serial forward transmission error immediately after operation

Serial forward transmission error during operation

Indoor unit capacity error

Indoor unit error

Over voltage

Power supply frequency error

Outdoor unit PCB model information error

Outdoor unit inverters communication error

PFC communication error

Inverter error

PFC AD detection error

PFC hardware error

IPM error (Trip terminal L error)

Rush current limiting resister temp rise protection

Discharge temp. sensor error

Compressor temp. sensor error

Heat Ex. middle temp. sensor error

Outdoor unit Heat Ex. liquid temp. sensor error

Outdoor temp. sensor error

Heat sink temp. sensor error

PFC heat sink temp. sensor error

Current sensor 1 error (stoppage permanently)

High pressure switch 1 error

Pressure sensor error

Trip detection (stoppage permanently)

Compressor motor control error (stoppage permanently)

Compressor motor loss of synchronization (stoppage permanently)

Outdoor unit fan motor 1 error (Duty error)

Outdoor unit fan motor 2 error (Duty error)

4-way valve error

Discharge temp. 1 error (stoppage permanently)

Compressor 1 temp. error (stoppage permanently)

Low pressure error

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