Fujitsu AJT108GALH Installation Manual

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INSTALLATION MANUAL

OUTDOOR UNIT

For authorized service personnel only.

AJTA72GALH

AJTA90GALH

AJT108GALH

AJT126GALH

PART NO. 9378945371

INSTALLATION MANUAL

PART NO. 9378945371

VRF system outdoor unit

Contents

2. 1. Caution when using R410A refrigerant ……………………………………… 2

2. 2. Special tools for R410A ……………………………………………………… 2

2. 3. Accessories …………………………………………………………………… 2

2. 4. Combinations ………………………………………………………………… 2

2. 5. Optional parts ………………………………………………………………… 3

3. 1. Selecting an installation location …………………………………………… 3

3. 2. Drain processing ……………………………………………………………… 3

3. 3. Installation dimensions ……………………………………………………… 3

3. 4. Transportation the outdoor unit ……………………………………………… 5

3. 5. Installing the unit ……………………………………………………………… 6

4. 1. System con fi guration ………………………………………………………… 6

4. 2. Pipe selection ………………………………………………………………… 7

4. 3. Protection of pipes …………………………………………………………… 8

5. 1. Brazing ………………………………………………………………………… 8

5. 2. Indoor unit pipe connections ………………………………………………… 8

5. 3. Piping method ………………………………………………………………… 9

5. 4. Multiple connections ……………………………………………………… 10

6. 1. The precautions of electrical wiring ……………………………………… 11

6. 2. Wiring method ……………………………………………………………… 12

6. 3. Knockout hole ……………………………………………………………… 13

6. 4. Selecting power supply cable and breaker ……………………………… 13

6. 5. Transmission line …………………………………………………………… 13

6. 6. Wiring procedure …………………………………………………………… 15

6. 7. External input and external output ……………………………………… 16

7. 1. Field setting switches ……………………………………………………… 17

7. 2. DIP switch setting ………………………………………………………… 17

7. 3. Rotary switch setting ……………………………………………………… 18

7. 4. Push button setting ………………………………………………………… 18

7. 5. Signal ampli fi er address setting …………………………………………… 20

7. 6. Indoor unit address setting ………………………………………………… 20

7. 7. RB unit address setting …………………………………………………… 21

7. 8. Resistance measurement of transmission cable

8. 1. Sealing test ………………………………………………………………… 22

8. 2. Vacuum process …………………………………………………………… 22

8. 3. Additional charging ………………………………………………………… 23

8. 4. Installing insulation ………………………………………………………… 24

9. 1. Pre-test run check items …………………………………………………… 24

9. 2. Test operation method …………………………………………………… 24

9. 3. Checklist …………………………………………………………………… 25

10. LED STATUS ……………………………………………………………………… 25

10. 1. Normal operation codes …………………………………………………… 25

10. 2. Error codes ………………………………………………………………… 25

11. INFORMATION …………………………………………………………………… 25

1. SAFETY PRECAUTIONS

• Be sure to read this Installation manual thoroughly before installation.

• The warnings and precautions indicated in this Installation manual contain important information pertaining to your safety. Be sure to observe them.

• After installing the unit, perform a test run to make sure the unit operates normally.

Then, explain to the customer how to operate and maintain the unit.

• Please pass this Installation manual together with the Operating manual to the customer.

Please ask the customer to keep the Operating manual and Installation manual at hand for future reference during the moving or repair of the main unit.

WARNING

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

For installation purposes, be sure to use the parts supplied by the manufacturer or other prescribed parts.

Using non-speci fi ed parts will cause serious accidents such as falling unit, refrigerant leakage, water leakage, electric shock, and fi re.

To install a unit that uses the R410A refrigerant, use dedicated tools and piping materials that have been manufactured speci fi cally for R410A use.

Because the pressure of the R410A refrigerant is approximately 1.6 times higher than the R22, failure to use dedicated piping material or improper installation can cause rupture or injury.

It will also cause serious accidents such as refrigerant leakage, water leakage, electric shock, and fi re.

Do not use this equipment with air or any other unspeci fi ed refrigerant in the refrigerant lines.

Excess pressure can cause a rupture.

Be sure to install the 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.

Ensure that the outdoor unit is securely installed at a place that can withstand the weight of the unit.

Improper installation will cause injuries caused by falling unit.

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

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

If a refrigerant leakage occurs during operation, immediately vacate the premises and thoroughly ventilate the area.

If the refrigerant is exposed to fi re, it will create a hazardous gas.

Electrical work must be performed in accordance with this Installation manual by a person certi fi ed under the national or regional regulations. Be sure to use a dedicated circuit for the unit.

An insuf fi cient power supply circuit or improperly performed electrical work can cause serious accidents such as electric shock or fi re.

For wiring, use the prescribed type of cables, connect them securely, making sure that there are no external forces of the cables applied to the terminal connections.

Improperly connected or secured cables can cause serious accidents such as overheating the terminals, electric shock, or fi re.

Do not turn ON the power until all work has been completed.

Turning ON the power before the work is completed can cause serious accidents such as electric shock or fi re.

After the installation, make sure there is no refrigerant leakage.

If the refrigerant leaks into the room and becomes exposed to a source of fi re such as a fan heater, stove, or burner, it will create a hazardous gas.

Use a wall hole pipe. Otherwise, it may cause a short circuit.

Do not place the outdoor unit near the handrail of the balcony.

Children may climb onto the outdoor unit, lean over the handrail and fall over.

Use only a speci fi ed power cable. Poor connection, poor insulation, and exceeding the allowable current will lead to electric shock and fi re.

Attach the connecting cables securely to the terminal. Or secure it fi rmly with a "wiring suppressor".

Loose connection will lead to malfunction, electric shock, and fi re.

Install a breaker to cut off all AC main current at the same time.

If you do not install a breaker, it may cause electric shock and fi re.

During installation, make sure that the refrigerant pipe is attached fi rmly 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 rupture 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.

If there is a possibility of touching the fan during maintenance, make sure to turn

OFF the power before implementing the maintenance. Even if operations are suspended, the fan of outdoor unit sometimes rotates, so if the fan rotates suddenly while in contact with you may cause serious injury.

CAUTION

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

This unit must be installed by quali fi ed personnel with a capacity certi fi cate for handling refrigerant fl uids. 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.

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.

the of the power supply system, speci fi cation of the cable and the harmonic current, and etc. when you connect the outdoor unit with the power supply.

• This unit must be connected to a power supply with impedance of 0.33 ohm and below. If the power supply does not satisfy this requirement, please consult the power supplier.

• This product is intended for professional use.

Be sure to use a dedicated power circuit.

Never use a power supply shared by another appliance.

En-1

Do not install the unit in the following areas:

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

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

• Area fi lled with mineral oil or containing a large amount of splashed oil or steam, such as a kitchen.

It will deteriorate plastic parts, causing the parts to 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.

containing

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

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

• Avoid the urine or ammonia.

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

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.

Ground the unit. Do not connect the ground wire to a gas pipe, water pipe, lightning rod, or a telephone ground wire. Improper grounding may cause electric shock.

Perform draining for the unit according to the Installation manual. Check that the water is properly drained.

If the drain processing is improperly installed, water may drip down from the unit, wetting the furniture.

Do not touch the fi ns with bare hands.

Be sure not to start or stop the operation of air conditioning with power breaker.

Otherwise, it may cause malfunction or water leakage.

When setting it up near the equipment that generates electromagnetic waves and the equipment that generates the higher harmonics wave, be sure to take measures against noise. Otherwise, it may cause malfunction or failure.

When energizing to the crankcase heater, please turn on the power 12 hours or earlier before operation begins. When the energizing time is short, it may cause failure. Besides, please do not turn off power during the busy season.

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

This product is not intended to be used by people (including children) with physical, sensory or mental disability, or persons lacking experience or knowledge unless they have been given by the through a person responsible for their safety, supervision or instruction concerning the use of the device.

2. ABOUT THIS PRODUCT

2. 1. Caution when using R410A refrigerant

Pay careful attention to the following points :

Since the working pressure is 1.6 times higher than that of R22 models, some of the piping and installation and service tools are special. (See the table in the SPECIAL

TOOLS FOR R410A section.)

Especially, when replacing a conventional refrigerant (other than R410A) model with a new refrigerant R410A model, always replace the conventional piping and fl are nuts with the R410A piping and fl are nuts.

Models that use refrigerant R410A have a different charging port thread diameter to prevent erroneous charging with R22, R407C and for safety. Therefore, check beforehand. [The charging port thread diameter for R410A is 1/2 UNF 20 threads per inch.]

Be more careful than the installation of the refrigerant (other than R410A) models, not to enter foreign matters (oil, water, etc.) and other refrigerant into the piping.

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 side whose composition is stable.

2. 2. Special tools for R410A

Tool name

Gauge manifold

Charging hose

Contents of change for R22 tool

Pressure is huge and cannot be measured with a conventional (R22) gauge. To prevent erroneous mixing of other refrigerants, the diameter of each port has been changed.

It is recommended to use a gauge manifold with a high pressure display range -0.1 to 5.3 MPa and a low pressure display range -0.1 to 3.8 MPa.

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

Tool name

Vacuum pump

Gas leakage detector

Contents of change for R22 tool

A conventional (R22) vacuum pump can be used by installing a vacuum pump adapter.

vacuum pump adapter.

• Be sure that the pump oil does not back fl ow into the system. Use one capable for vacuum suction of -100.7kPa (5

Ton, -755mmHg).

Special gas leakage detector for HFC refrigerant R410A.

2. 3. Accessories

Use connecting parts as required.

Do not throw away the connecting parts until the installation has been complete.

Name and shape

Installation manual

Q’ty

(This book)

Application

1 cable tie

Grommet edging

Joint pipe for Suction gas pipe

Joint pipe A

(Large, Straight type)

4

For binding power cable and transmission cable

2

For power supply cable and connection cable installation.

Attach to the knockout hole.

72

Model code

90 108 126

1 1 1 1

Joint pipe B

(Large , L type)

1 1 1 1

Joint pipe for Discharge gas pipe

Joint pipe C

(Small , Straight type)

Joint pipe D

(Small , L type)

72

Model code

90 108 126

1 1 1

1 1 1 1

2. 4. Combinations

A maximum of 3 outdoor units can be connected to 1 refrigerant system.

The combination of outdoor units per refrigerant system and the number of indoor units that can be connected are as follows:

Model Name

AJTA72GALH

AJTA90GALH

AJT108GALH

AJT126GALH

Outdoor Unit

Nominal System Capacity (HP)

8

10

12

14

En-2

Space saving combination

Combination (HP)

Outdoor Unit 1 (HP)

Outdoor Unit 2 (HP)

Outdoor Unit 3 (HP)

8 10 12 14 16 18 20 22 24 26 28

8 10 12 14 8 10 10 12 14 14 14

8 8 10 10 10 12 14

-

Maximum Connectable Indoor Unit 15 16 17 21 24 27 30 32 36 39 42

Combination (HP)

Outdoor Unit 1 (HP)

Outdoor Unit 2 (HP)

Outdoor Unit 3 (HP)

30 32 34 36 38 40 42

10 12 14 14 14 14 14

10 10 10 12 14 14 14

10 10 10 10 10 12 14

Maximum Connectable Indoor Unit 45 47 51 54 57 60 64

When connecting outdoor units, install the outdoor unit with the largest nominal system capacity nearest to the refrigerant pipe and indoor unit, followed by those with lesser nominal system capacities. (Outdoor unit 1 ≥ Outdoor unit 2 ≥ Outdoor unit 3)

Energy-saving combination

Combination (HP)

Outdoor Unit 1 (HP)

Outdoor Unit 2 (HP)

Outdoor Unit 3 (HP)

8 10 12 14 16 18 20 22 24 26 28

-

-

-

-

-

-

-

-

-

-

-

Maximum Connectable Indoor Unit * * * * *

-

-

-

-

-

8 8 8 8

*

12

-

29

-

8 8 8

*

8 10 12

36 39 41

Combination (HP)

Outdoor Unit 1 (HP)

Outdoor Unit 2 (HP)

Outdoor Unit 3 (HP)

30 32 34 36 38 40 42

12 12 12 12 14 -

10 12 12 12 12

8 8 10 12 12 -

-

-

-

-

Maximum Connectable Indoor Unit 44 47 50 53 57 * *

* Means that the energy-saving combination is unavailable.

When connecting outdoor units, install the outdoor unit with the largest nominal system capacity nearest to the refrigerant pipe and indoor unit, followed by those with lesser nominal system capacities. (Outdoor unit 1 ≥ Outdoor unit 2 ≥ Outdoor unit 3)

2. 5. Optional parts

CAUTION

The following parts are optional parts speci fi c to R410A refrigerant.

Do not use parts other than those listed below.

2. 5. 1. RB unit

RB unit

UTP-RX01AH

Total cooling capacity of indoor unit (kW)

8.0 or less

UTP-RX01BH 18.0 or less

UTP-RX01CH

UTP-RX04BH

28.0 or less

18.0 or less (for 1 branch)

56.0 or less (Sum total of 4 branches) *

*: In case of 2 RB units connected in series (total 8 branches), maximum capacity of connectable indoor units is up to 56.0 kW.

2. 5. 2. Outdoor unit branch kit

Model

UTP-DX567A

Total cooling capacity of indoor unit (kW)

ALL

2. 5. 3. Separation tube

for 2 pipes

UTP-AX054A

UTP-AX090A

UTP-AX180A

UTP-AX567A

Model for 3 pipes

UTP-BX090A

UTP-BX180A

UTP-BX567A

2. 5. 4. Header

Model: for 2 pipes

3-6 branches 3-8 branches

UTR-H0906L

UTR-H1806L

UTR-H0908L

UTR-H1808L

Total cooling capacity of indoor unit (kW)

19.6 or less

28.0 or less

28.1 to 56.0

56.1 or more

Total cooling capacity of indoor unit

(kW)

28.0 or less

28.1 to 56.0

Model: for 3 pipes

3-6 branches 3-8 branches

UTP-J0906A

UTP-J1806A

UTP-J0908A

UTP-J1808A

Total cooling capacity of indoor unit

(kW)

28.0 or less

28.1 to 56.0

2. 5. 5. External connect kit

Model

UTY-XWZXZ6

UTY-XWZXZF

UTY-XWZXZ9

Usage

For External input (CN131, CN133, CN134)

For External output

(Error status / CN136) (Operation status / CN137)

For External input (CN135)

For External output (Base heater / CN115)

3. INSTALLATION WORK

Please obtain the approval of the customer when selecting the location of installation and installing the main unit.

3. 1. Selecting an installation location

WARNING

Install the unit in a location that can withstand its weight, and where it will not topple or fall.

Calculate the proper refrigerant concentration if you will be installing it in an enclosed location.

Total amount of replenished refrigerant in refrigerant facility (kg)

Capacity of smallest room where unit is installed (m 3 )

Refrigerant concentration (kg/m

(0.44kg/m 3 )

If the results of the calculation exceed the concentration limit, increase the room surface area or install a ventilation duct.

3 )

CAUTION

Select an installation location by observing the following precautions:

Install the unit level. (Within 3 degrees)

Install this unit in a location with good ventilation.

If the 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 unit in an area that would not inconvenience your neighbors, as they could be affected by the air fl ow 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 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.

Install the unit in an area that would not cause problems even if the drain water is discharged from the unit. Otherwise, provide drainage that would not affect people or objects.

Install the unit in an area that has no heat sources, vapors, or the risk of the leakage of fl ammable gas in the vicinity.

Install the unit in an area that is away from the exhaust or 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 meter away from a television or radio.

The purpose of this is to prevent TV reception interference or radio noise. (Even if they are installed more than 1 meter apart, you could still receive noise under some signal conditions.)

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 processing

• The drain water is discharged from the bottom of the equipment. Construct a drain ditch around the base and discharge the drain water properly.

• When installing on a roof, perform fl oor waterproo fi ng properly.

Drain processing:

• The drain water from the base of the outdoor unit may generate during operations.

Perform drain processing, as necessary.

• When you want to prevent the drain water from leaking at the perimeter, construct a ditch for the drain water as shown in the fi gure.

• Provide a central drain pan, as necessary.

Outdoor unit

50mm or more

10mm or more

3. 3. Installation dimensions

CAUTION

When installing the outdoor unit, pay attention to the following items.

Provide suf fi cient installation space, such as transportation route, maintenance space, ventilation space, refrigerant piping space, and passageways.

En-3

CAUTION

Pay attention to the speci fi cations of the installation space as shown in the fi gure. If the unit is not installed according to speci fi cations, it may cause short circuit or poor performance. The unit may be prone to lapse into non-operation due to high pressure protection.

Do not place obstructions in the air fl ow outlet direction. If there is an obstruction in the outlet direction, install an outlet duct.

When there is a wall in front of the unit, provide a space of 500mm or more as maintenance space.

When there is a wall at the left side of the unit, provide a space of 30mm or more as maintenance space.

An outdoor temperature of 35 degrees in air-conditioned operation is assumed for the installation space in this item. If the outdoor temperature exceeds 35 degrees and the outdoor unit is operating at a load exceeding its rated ability, provide a larger inlet space.

If you are installing more outdoor units than indicated here, please ensure suf fi cient space or consult your distributing agent as it may affect the performance due to short circuit and other problems.

3. 3. 1. When install near by limited height wall

(1) Single and multiple installations

• There are no restrictions on the height of the side wall.

• Provide installation spaces L1 and L2 in accordance with the table below according to the wall height (front side, rear side) conditions.

shown in the fi gure below.

• Ventilation resistance can be ignorable when the distance from a wall or product, etc. is larger than 2m.

Wall height condition

When H1 is 1500 (mm) or less

When H1 is 1500 (mm) or more

When H2 is 500 (mm) or less

When H2 is 500 (mm) or more

Fig. 1

<Front>

<Side view>

Necessary installation space

L1 ≥ 500 (mm)

L1 ≥ 500+h1÷2 (mm)

L2 ≥ 100 (mm)

L2 ≥ 100+h2÷2 (mm)

<Rear>

Fig. 4

Fig. 5

<Front>

<Side view>

<Rear>

Wall

L3

<Front view>

L4

Wall

Fig. 6

Wall

L5

<Top view>

L5

Wall

L4

800mm or more

800mm or more

L3

Fig. 7

L5 20mm or more

20mm or more

<Top view>

L5

L4

500mm or more

L1

Wall

Fig. 2 Single installation

<Top view>

<Rear>

L2

Wall

Fig. 3 Multiple installations

<Top view>

<Front>

30mm or more

10mm or more

30mm or more

20mm or more

20mm or more

10mm or more installation

• Provide installation spaces L3, L4, and L5 in accordance with the table below according to the wall height (front side, rear side) conditions.

• Provide installation tions shown in the fi spaces

gure below.

• Ventilation resistance can be ignorable when the distance from a wall or product, etc. is larger than 2m.

Wall height condition

When H3 is 1500 (mm) or less

When H3 is 1500 (mm) or more

When H4 is 500 (mm) or less

When H4 is 500 (mm) or more

When H5 is 500 (mm) or less

When H5 is 500 (mm) or more

L3

L5

L5

Necessary installation space

L3 ≥ 500 (mm)

L4 ≥ 200 (mm)

L4 ≥ 200+h4÷2 (mm)

500+h3÷2 (mm)

200 (mm)

200+h5÷2 (mm)

1000mm or more

L3

L5 20mm or more

20mm or more

L5

3. 3. 2. When install near unlimited height wall

(1) Single and multiple installations

• There are no restrictions on the height of the wall.

• The wall (without height restrictions) must not exist on the both sides (left / right) of outdoor unit. Also, must not exist on the both sides (front / rear) of outdoor unit.

shown in the fi gure below.

• Ventilation resistance can be ignorable when the distance from a wall or product, etc. is larger than 2 m.

When installing with the rear of the outdoor unit facing the wall side

Condition

When B ≥ 400 (mm)

When 20 ≤ B < 400 (mm)

Necessary installation space

L6 ≥ 200 (mm)

L6 ≥ 200 + (400-B) ×3 (mm)

En-4

Fig. 8 Single installation

<Rear>

<Top view>

100mm or more

<Front>

200mm or more

Fig. 9 Multiple installations

<Top view>

<Rear>

<Front>

200mm or more

B B

L6

800mm or more

200mm or more

200mm 200mm

Example :

When B is made 200mm

L6 ≥ 200+(400-200)×3=800mm

When installing with the FRONT of the outdoor unit facing the wall side

Fig. 10

<Top view> Wall

500mm or more

Wall

Fig. 11

200mm or more

<Top view> Wall

500mm or more

Wall

200mm or more

20mm or more

20mm or more

• The wall (without height restrictions) must not exist on the both sides (left / right) of outdoor unit. Also, must not exist on the both sides (front / rear) of outdoor unit.

• Ventilation resistance can be ignorable when the distance from a wall or product, etc. is larger than 2m.

Fig. 12

<Top view>

400mm or more

800mm or more

800mm or more

Fig. 13

<Top view>

400mm or more

500mm or more

1000mm or more

1000mm or more

400mm or more

400mm or more

3. 3. 3. When there are obstacles above the product

When there are obstacles above the product, keep the minimum installation height as shown in the fi gure and install the outlet duct.

When installing the outlet duct, you must set the high static pressure mode with the push-button switch.

(Similar when installing anti-snow hood)

Outlet duct

Setting high static pressure mode

Follow the instructions in the table below to set the high static pressure mode.

500mm or more

Condition

Static Pressure (SP) *1 :

0 ≤ SP ≤ 30 (Pa)

High static pressure mode setting *2

Set to High static pressure

1

Static Pressure (SP) *1 :

30 < SP ≤ 80 (Pa)

Set to High static pressure

2

*1. Static pressure is the air fl ow resistance that includes the discharge duct resistance & the other additional resistance like discharge grill and so on.

*2. Refer to the section on Push Switch Setting in “7. FIELD SETTING”.

3. 4. Transportation the outdoor unit

Product mass (kg)

AJTA72GALH

AJTA90GALH

262

262

AJT108GALH

AJT126GALH

286

286

Hoisting method

unit with rope by passing through the 4 opening holes on bottom of front and rear side as shown in unit.

fi gure.

• Use 2 ropes at least 8m long. If used shorter length, it may cause to damage to the the the fi ciently strong rope to bear the unit’s weight.

or into contact with rope to prevent from damages. Without using them, cabinet may cause to damage or deform.

• During the hanging unit, make sure to keep the unit level to prevent from falling.

• To prevent an unit swing accident or falling down of the unit, do not apply any impact to the unit when it is hanging.

1000mm or more

400mm or more

400mm or more protective boards opening space

En-5

Lifting by forklift

• When using the forklift to lift the unit, pass the forklift arms through the opening space as shown in below.

Front : Bottom of the wooden delivery pallet.

Side : Space between pallet and cabinet.

(Enable to remove the pallet from cabinet.)

• Be

Lifting by forklift (Manual forklift: hand-fork)

using opening space between pallet and cabinet from side.

<Front> <Side>

4. SYSTEM CONFIGURATION

4. 1. System con

fi

guration

CAUTION

unit on the refrigerant pipe as the master unit.

nominal system capacity nearest to the indoor unit on the refrigerant pipe, followed by those with less nominal system capacities.

[Capacity: Master

Slave]

• Always keep to the limit on the total amount of refrigerant. Exceeding the limit on the total amount of refrigerant when charging will lead to malfunction.

A) In case of 1 outdoor unit connected

Fig. A

O.U.

(Master) f a

O.U. :Outdoor unit

RB :RB unit

I.U. :Indoor unit

(*1: Cooling only)

Fork (Forklift)

Delivery pallet

Fork (forklift) or

Fork (Manual forklift)

3. 5. Installing the unit

• Install the unit level. (within 3 degrees).

• Install 4 or more anchor bolts at the 8 locations indicated by arrows (Fig. A).

• Place the left and right anchor bolts at a distance further away than the dimensions of A in the Table A.

(Excluding the case where anchor bolts are installed at 8 places.)

Fig. A (Unit: mm)

160

B

A 160

Hole: 12 × 17

(8 places)

Bottom view

80

Table.A

Model name

AJTA72GALH

AJTA90GALH

AJT108GALH

AJT126GALH

A

610

610

920

920

80

B

930

930

1240

1240

• To minimize vibration, do not install the outdoor unit directly on the ground.

Instead, install it on top of a fi rm platform (such as concrete block). (Fig. B)

• The foundation base should be able to support the product and the foot width of the product should be more than 46.5mm.

may cause noise and vibration.

Install vibration-proo fi ng materials (such as rubber pads).

• Consider the removal space of the connection piping when installing the foundation.

Fig. B

PROHIBITED GOOD GOOD

Bolt (M10)

H5

RB

I.U.

RB

I.U.

RB

I.U.

H3

H4

RB

I.U.

H2

• Allowable pip length (actual pipe length)

Between master outdoor unit and the farthest indoor unit

Between the fi rst separation tube and the farthest indoor unit

Total pipe length

• Allowable height difference

Between outdoor unit and indoor unit (When indoor unit is installed below)

Between outdoor unit and indoor unit (When outdoor unit is installed below)

Between indoor units

Between RB unit and indoor unit

Between RB units

165 m or less

60 m or less

700 m or less

50 m or less

40 m or less

15 m or less

5 m or less

15 m or less

• Total refrigerant amount : 35 kg or less

B) In case of 2 outdoor units connected

Fig. B

O.U.-2

(Slave)

O.U.-1

(Master) H4 a

O.U. :Outdoor unit

RB :RB unit

I.U. :Indoor unit e b f (*1: Cooling only)

H6

RB

I.U.

RB p

I.U.

RB

I.U.

RB

I.U.

I.U.

*1

H1

RB

I.U.

RB

I.U.

p

RB

I.U.

RB

I.U.

*1

I.U.

H1

RB

I.U.

RB

I.U.

RB

I.U.

H3

H5

RB

I.U.

H2

*Do not use a four-corner support foundation.

Fig. C

When installing piping from the bottom of the outdoor units, the required space under the outdoor unit ≥ 200mm.

* Install the branch kit horizontally.

a+f a+p f, p

Total

H1

H2, H3

H4

H5

En-6

• Allowable pip length (actual pipe length)

Between master outdoor unit and the farthest indoor unit

Between the fi rst separation tube and the farthest indoor unit

Total pipe length

Between outdoor unit and outdoor unit branch kit

165 m or less

60 m or less

1000 m or less

3 m or less

• Allowable height difference

Between outdoor unit and indoor unit (When indoor unit is installed below)

Between outdoor unit and indoor unit (When outdoor unit is installed below)

Between indoor units

Between outdoor units

Between RB unit and indoor unit

Between RB units

50 m or less

40 m or less

15 m or less

0.5 m or less

5 m or less

15 m or less

• Total refrigerant amount : 70 kg or less

• Outdoor unit capacity : Master Slave

C) In the case of 3 outdoor units connected

O.U.-3

(Slave2)

O.U.-1

(Master) a

O.U.-2

(Slave1) H4 b

O.U. :Outdoor unit

RB :RB unit

I.U. :Indoor unit e d c f (*1:Cooling only)

Fig. C

H6

RB

I.U.

RB

I.U.

p

RB

I.U.

RB

I.U.

*1

I.U.

H1 a+e+f a+e+p f, p

Total a, b

H1

H2, H3

H4

H5

H6

RB RB RB RB

H2

I.U.

I.U.

I.U.

H3

H5

I.U.

• Allowable pip length (actual pipe length)

Between master outdoor unit and the farthest indoor unit

Between the fi rst separation tube and the farthest indoor unit

Total pipe length

Between outdoor unit and outdoor unit branch kit

Between the farthest outdoor unit and the fi rst outdoor unit branch kit

• Allowable height difference

Between outdoor unit and indoor unit (When indoor unit is installed below)

Between outdoor unit and indoor unit (When outdoor unit is installed below)

Between indoor units

Between outdoor units

Between RB unit and indoor unit

Between RB units

165 m or less

60 m or less

1000 m or less

3 m or less

12 m or less

50 m or less

40 m or less

15 m or less

0.5 m or less

5 m or less

15 m or less a+e+f a+e+p f, p

Total a, b, c b+d c+d

H1

H2, H3

H4

H5

H6

• Total refrigerant amount : 105 kg or less

• Outdoor unit capacity : Master Slave 1 ≥ Slave 2

NOTE:

• If the outdoor temperature during cooling operation is expected to be –5 °C or less, outdoor unit must be installed lower than 5 m or less from the indoor unit.

• Please refer to “8.3.2. Checking total amount of refrigerant and calculating the amount of refrigerant charge to be added” for the total amount of refrigerant.

4. 2. Pipe selection

CAUTION

This unit is designed speci fi cally for use with the R410A refrigerant. Pipes for

R407C or R22 may not be used with this unit. Do not use existing pipes. Improper pipe selection will degrade performance.

Pipe size

(table D)

RB

Master unit

Slave unit1

Slave unit2

Outdoor unit branch kit (Optional)

Separation tube (Optional)

RB (multi type)

Pipe size (table A)

Pipe size (table B)

Pipe size (table C)

Pipe size (table E)

Pipe size (table F)

(Wall thickness and pipe material for each diameter)

Outside Diameter mm 6.35

9.52

12.70

15.88

19.05

22.22

28.58

34.92

41.27

Wall Thickness*3 mm 0.8

Material

0.8

0.8

1.0

1.2

COPPER*1

JIS H3300 C1220T-O or equivalent

1.0

1.0

1.2

1.43

COPPER*2

JIS H3300 C1220T-H or equivalent stress 33 (N/mm stress 61 (N/mm

2

2 )

)

*3. Endurance pressure of the pipes 4.2MPa

Please select the pipe size in accordance with local rules.

Table. A (Between outdoor unit and outdoor unit branch kit)

HP

8

10

12

14

Outdoor unit cooling capacity (kW)

22.4

28.0

33.5

40.0

Outside diameter mm (in)

Liquid pipe

Discharge

Gas pipe

Suction Gas pipe

12.70 (1/2") 15.88 (5/8") 22.22 (7/8")

12.70 (1/2") 19.05 (3/4") 22.22 (7/8")

12.70 (1/2") 19.05 (3/4") 28.58 (1-1/8")

12.70 (1/2") 22.22 (7/8") 28.58 (1-1/8")

Branch kit*4

UTP-DX567A

*4. For the installation method, refer to “5.4. Multiple connections”.

Table. B (Between outdoor unit branch kits or outdoor unit branch kit and fi rst separation tube)

Total cooling capacity of outdoor unit (kW)

22.4

22.5 to 28.0

Liquid pipe

12.70 (1/2")

12.70 (1/2")

12.70 (1/2")

Outside diameter mm (in)

Discharge Gas pipe

15.88 (5/8")

Suction Gas pipe

22.22 (7/8")

19.05 (3/4")

19.05 (3/4")

22.22 (7/8")

28.58 (1-1/8") 28.1 to 33.5

33.6 to 45.0

45.1 to 56.0

56.1 to 78.5

12.70 (1/2")

15.88 (5/8")

15.88 (5/8")

19.05 (3/4")

22.22 (7/8")

22.22 (7/8")

28.58 (1-1/8")

28.58 (1-1/8")

28.58 (1-1/8")

28.58 (1-1/8")

34.92 (1-3/8")

34.92 (1-3/8") 78.6 to 96.0

96.1 to 102.4

102.5 or more

19.05 (3/4")

19.05 (3/4")

28.58 (1-1/8")

34.92 (1-3/8")

41.27 (1-5/8")

41.27 (1-5/8")

Table. C (Between separation tubes or separation tube and RB unit)

Total cooling capacity of indoor unit (kW)

Outside diameter mm (in)

Liquid pipe

Discharge Gas pipe

Suction Gas pipe

Separation tube for 3 pipes

4.4 to 11.1

9.52 (3/8") 12.70 (1/2") 15.88 (5/8")

11.2 to 13.9

14.0 to 22.3

9.52 (3/8")

12.70 (1/2")

12.70 (1/2")

15.88 (5/8")

19.05 (3/4")

22.22 (7/8")

UTP-

BX090A

22.4 to 28.0

28.1 to 44.7

44.8 to 46.9

47.0 to 56.0

12.70 (1/2")

12.70 (1/2")

15.88 (5/8")

15.88 (5/8")

19.05 (3/4")

19.05 (3/4")

19.05 (3/4")

22.22 (7/8")

22.22 (7/8")

28.58 (1-1/8")

28.58 (1-1/8")

28.58 (1-1/8")

UTP-

BX180A

56.1 to 80.0

80.1 to 95.0

95.1 or more

15.88 (5/8")

19.05 (3/4")

19.05 (3/4")

28.58 (1-1/8") 34.92 (1-3/8")

28.58 (1-1/8") 34.92 (1-3/8")

28.58 (1-1/8") 41.27 (1-5/8")

UTP-

BX567A

* If the selected pipe diameter between separation tubes (based on table "C") becomes larger than the pipe diameter between outdoor unit branch kit and the fi rst separation tube (based on table "B"), please select the pipe whose diameter is equal to the one between outdoor unit branch kit and the fi rst separation tube.

(If pipe diameter C > B, select pipe size from table B)

* "Total cooling capacity of indoor unit" is the total value for the cooling capacity of indoor unit connected downstream.

* Discharge gas pipe size selection : When indoor unit of cooling only type is connected, it calculates with the value except capacity of cooling only type.

En-7

Table. D (Between separation tube and RB unit)

Model code

Cooling capacity of indoor unit (kW)

Outside diameter mm (in)

Liquid pipe

Discharge

Gas pipe

Suction

Gas pipe

07, 09, 12, 14 2.2, 2.8, 3.6, 4.0, 4.5

6.35 (1/4") 9.52 (3/8") 12.70 (1/2")

18, 24, 30

36, 45, 54

5.6, 7.1, 8.0, 9.0

11.2, 12.5, 14.0

9.52 (3/8")

9.52 (3/8")

12.70 (1/2")

12.70 (1/2")

15.88 (5/8")

19.05 (3/4")

60

72, 90

18.0

22.4, 25.0

9.52 (3/8")

12.70 (1/2")

15.88 (5/8") 19.05 (3/4")

19.05 (3/4") 22.22 (7/8")

Use a standard separation tube for pipe branching. Do not use a T tube as it does not separate the refrigerant evenly.

Table. E (Between separation tubes or RB unit and separation tube)

Total cooling capacity of indoor unit (kW)

Outside diameter mm (in) Separation tube for 2 pipes

4.4 to 11.1

11.2 to 13.9

14.0 to 19.6

19.7 to 28.0

28.1 to 44.7

Liquid pipe

9.52 (3/8")

9.52 (3/8")

12.70 (1/2")

12.70 (1/2")

12.70 (1/2")

Gas pipe

15.88 (5/8")

19.05 (3/4")

22.22 (7/8")

22.22 (7/8")

28.58 (1-1/8")

UTP-AX054A

UTP-AX090A

UTP-AX180A

44.8 to 56.0

56.1 to 80.0

80.1 to 95.0

95.1 or more

15.88 (5/8")

15.88 (5/8")

19.05 (3/4")

19.05 (3/4")

28.58 (1-1/8")

34.92 (1-3/8")

34.92 (1-3/8")

41.27 (1-5/8")

UTP-AX567A

* If the selected pipe diameter based on table "E" becomes larger than the pipe diameter based on table "C", please select the pipe whose diameter is equal to the table "C".

Gas pipe of table "E" should be compared with suction gas pipe of table "C."

(If pipe diameter E > C, select pipe size from table C)

* "Total cooling capacity of indoor unit" is the total value for the cooling capacity of indoor unit connected downstream.

Table. F (Between separation tube and indoor unit or RB unit and indoor unit)

Outside diameter mm (in)

Model code

Cooling capacity of indoor unit (kW)

07, 09, 12, 14

18, 24, 30

36, 45, 54

60

72, 90

2.2, 2.8, 3.6, 4.0, 4.5

5.6, 7.1, 8.0, 9.0

11.2, 12.5, 14.0

18.0

22.4, 25.0

Liquid pipe

6.35 (1/4")

9.52 (3/8")

9.52 (3/8")

9.52 (3/8")

12.70 (1/2")

Gas pipe

12.70 (1/2")

15.88 (5/8")

19.05 (3/4")

19.05 (3/4")

22.22 (7/8")

Table. G (Separation tube / Header)

Total cooling capacity of indoor unit (kW)

19.6 or less

28.0 or less

28.1 to 56.0

56.1 or more

Separation tube *5 for 2 pipes

UTP-AX054A

UTP-AX090A

UTP-AX180A

UTP-AX567A for 3 pipes

UTP-BX090A

UTP-BX180A

UTP-BX567A

• Header

Total cooling capacity of indoor unit (kW)

28.0 or less

28.1 to 56.0

Header *5 for 2 pipes for 3 pipes

3-6 Branches 3-8 Branches 3-6 Branches 3-8 Branches

UTR-H0906L UTR-H0908L UTP-J0906A UTP-J0908A

UTR-H1806L UTR-H1808L UTP-J1806A UTP-J1808A

*5. For the installation method, refer to the section on "Indoor unit pipe connections" below.

4. 3. 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

5. PIPE INSTALLATION

5. 1. Brazing

CAUTION

If air or different 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.

Fig.

Pressure regulating valve

Cap

Apply nitrogen gas while brazing the pipes.

Nitrogen gas pressure: 0.02 MPa (= suffi cient pressure to be felt on the back of your hand or more)

Nitrogen gas

Brazing area

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

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

Do not use fl ux to braze pipes. If the fl ux is the chlorine type, it will cause the pipes to corrode.

In addition, if the fl ux contains fl uoride, it will affect the refrigerant piping system due to deterioration of refrigerant oil.

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

5. 2. Indoor unit pipe connections

CAUTION

For details, refer to the Installation Instruction Sheet of each part.

Separation tube

Horizontal

B

A

Vertical

B

A

± 15° Horizontal line

GOOD

A : Outdoor unit or Refrigerant branch kit

B : Indoor unit or Refrigerant branch kit

B or

A

Header

Gas pipe

Outdoor unit side

C

Liquid pipe

Outdoor unit side

D

H

1

= 0 to 10 mm

( α

1

: 0° to 1°)

β

1

: -10° to 10°

PROHIBITED

GOOD

Horizontal line

H

1

α

1

Horizontal line

H 2

α

2

β

1

VIEW C

Horizontal line

Vertical line

β

2

VIEW D

H

2

= 0 to 10 mm

( α

2

: 0° to 1°)

β

2

: -10° to 10°

PROHIBITED PROHIBITED

CAUTION

Do not connect a separation tube after a header.

Leave the distance 0.5 m or more for straight part to branch tube and header.

En-8

Main pipe

0.5 m or more

Separation tube

To indoor unit

To indoor unit

Main pipe

0.5 m or more or

Header

To indoor unit

To indoor unit

0.5 m or more

Separation tube

To indoor unit

0.5 m or more or

Header

To indoor unit

5. 3. Piping method

5. 3. 1. Opening the knockout hole

CAUTION

Be careful to prevent panel deformation or damaged while opening the knockout hole.

To prevent cutting of the wiring after the knockout hole was opened, remove the burrs along the edge.

In addition, to prevent rusting, painting the edge with rust preventive paint is recommended.

The piping can be connected from 2 directions; the front or the bottom.

(Knockout holes are provided so that the piping can be connected from 2 different directions.)

Use the front knockout hole, as required.

Fig. A Knockout position

5. 3. 2. Removing the pinch pipe

WARNING

Remove the pinch pipe only when the internal gas is completely drained as shown on the below instructions.

If gas still remains inside, the piping may crack if you melt the brazing fi ller metal of the junction area with a burner.

Before connecting the piping, remove the pinch pipe in accordance with the following instructions:

1) Verify that the liquid side, suction gas side and discharge gas side

3-way valves are closed.

2) Cut the end of the liquid side , suction gas side and discharge gas side pinch pipe and vent the gas inside the pinch pipe.

3-way valves

End of pinch pipe

3) After all the gas is vented, melt the brazing fi ller metal on connecting part using a torch and remove the pinch pipe.

Fig. B Detail of knockout position (bottom)

(Unit: mm)

5. 3. 3. Pipe connection

CAUTION

Seal the pipe route hole with putty (locally purchased) such that there are no gaps.

Small insects or animals that are trapped in the outdoor unit may cause a short circuit in the electrical component box.

To prevent pipe damage; do not make sharp bends.

Bend the pipe at a radius of 70mm or greater.

Do not bent pipe many times at same part to prevent break.

After completing all the pipe connection by brazing, perform the indoor unit pipe connection with a fl are joint.

When removing the pinch pipe or brazing the joint pipe, carry out the work while cooling down the 3-way valve suf fi ciently.

Knockout hole

80

82 197

42

Fig. C Detail of knockout position (front)

(Unit: mm)

Knockout hole

73

43

125

199

En-9

• Braze the joint pipe onto the 3-way valves at the liquid , suction gas and discharge gas side.

Install the joint pipe appropriately so that it can be connected easily with the main pipe.

• Braze the joint pipe at the liquid , suction gas and discharge gas side with the main pipe.

* Be sure to supply nitrogen when brazing.

Fig. A

Joint pipe D

(Accessory)

Joint pipe B

(Accessory)

Joint pipe

(locally purchased)

Knockout hole

Suction gas pipe

(Locally purchased)

Discharge gas pipe

(Locally purchased)

Branch kit restriction when install

Be sure following restriction.

1) Installation angle

Outdoor unit branch kit

Horizontal

A

To indoor unit

PROHIBITED

GOOD:

0° to -10°

PROHIBITED

Vertical

A C

B

To outdoor unit

C To outdoor unit or next branch kit

PROHIBITED

C B

GOOD:

0° to -10°

PROHIBITED

Fig. B

Liquid pipe

(locally purchased)

Joint pipe

(Locally purchased)

To RB unit or indoor unit

Joint pipe C

(Accessory or locally purchased) *1

Joint pipe A

(Accessory or locally purchased) *1

Knockout hole

*1) Locally purchased and accessory depend on the model, so for details, refer "2.3. Accessories".

5. 4. Multiple connections

CAUTION

largest capacity nearest to the indoor unit.

For example) AJT108GALH (Outdoor Unit1) + AJTA90GALH (Outdoor Unit2) +

AJTA72GALH (Outdoor Unit3)

• When connecting multiple units, set the unit with the largest capacity as the master unit, and the rest as the slave units.

(Refer to “ 7. FIELD SETTING”)

• When connecting multiple units, use the optional outdoor unit branch kit.

Out

(Master

Outdoor Capacity

2 Units : Unit 1 ≥ Unit 2

3 Units : Unit 1 ≥ Unit 2 ≥ Unit 3

To

ind oor u nit

Out door u nit 2

)

Out door u nit 3

Outdoor unit branch kit

(Optional)

To indoor unit

(To main pipe)

Joint pipe

(Accessory)

To outdoor unit

Liquid pipe

(Locally purchased)

To outdoor unit

Discharge gas pipe

(Locally purchased)

Suction gas pipe

(Locally purchased)

PROHIBITED PROHIBITED PROHIBITED

• Install the outdoor unit branch kit horizontally level, within 0° to -10°, so that the refrigerant separates evenly.

• Do not install the outdoor unit branch kit vertically.

2) Straight pipe length

To indoor unit

(To main pipe)

To outdoor unit

To outdoor unit

0.5 m or more

To outdoor unit

To indoor unit (To main pipe)

To outdoor unit

0.5 m or more

To outdoor unit

• Leave the distance 0.5 m or more for straight part to outdoor unit branch kit.

3) About the connecting curvature of fi eld pipe and branch kit:

The fi eld pipe should be connected to the branch kit so that the curved angle on each side is 3 degree or less.

*: Allowed value based on “A” (center of fi eld pipe) at 0.5 m from “B” (junction of the branch kit).

0.5 m

4) For details, refer to the Installation Instruction Sheet of the outdoor unit branch kit.

Fig. Examples of multiple unit installation

(Example 1)

Master unit Slave unit1 Slave unit2

(Example 3)

Master unit

(Example 2)

Master unit Slave unit1 Slave unit2

Slave unit1

Slave unit2

En-10

CAUTION

To prevent the oil from settling in the stopped unit, install the pipes between the outdoor units so that they are level or are tilted upward to the outdoor units.

a) Installable patterns

Master unit

Slave unit 1

Slave unit 2

GOOD

To indoor unit

GOOD

Master unit

Slave unit 1

Slave unit 2

To indoor unit

GOOD

Master unit

Slave unit 1

Slave unit 2

To indoor unit

b) Non-installable patterns

PROHIBITED

To indoor unit

Master unit

Slave unit 1

Slave unit 2

PROHIBITED

To indoor unit

Master unit

Slave unit 1

Slave unit 2

PROHIBITED

To indoor unit

Master unit

Slave unit 1

Slave unit 2

(2) If the pipe length between outdoor unit branch kit and outdoor unit branch kit (or slave unit) is longer than 2 m, or a lower pipe line exists between outdoor units, rise for gas pipe (Discharge gas pipe and Suction gas pipe) should be arranged to eliminate oil from entering into and remaining at pipes and the stopped outdoor unit. However, there is no need to provide a rise on the pipe connecting between the master unit and the indoor unit even if the length exceeds 2m.

Master unit

Slave unit 1

Slave unit 2

To indoor unit

2 m or less 2 m or less

Suction gas pipe

Discharge gas pipe

To indoor unit

Master unit

To indoor unit

2 m or less

2 m or more

Master unit

Slave unit1

Slave unit2

Rise

(200 mm or more)

Suction gas pipe

Discharge gas pipe

2 m or less

2 m or more

Slave unit1

Slave unit2

Rise lower pipe

Suction gas pipe

Discharge gas pipe

6. ELECTRICAL WIRING

6. 1. The precautions of electrical wiring

WARNING

Wiring connections must be performed by a quali fi ed person in accordance with speci fi cations.

The rated supply of this product is 50Hz, 400V of 3-phase, 4-wire. Use a voltage within the range of 342-456V.

Make sure to perform earthing (grounding) work. Improper earthing (grounding) work can cause electric shocks.

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

Be sure to install an earth (ground) leakage breaker. Otherwise, it will cause electric shock or fi re.

Be sure to install a breaker of the speci fi ed capacity. When selecting breaker, please comply with the laws and the regulations of each country. One breaker must be installed on the power supply of the outdoor unit. Wrong selection and setup of the breaker will cause electric shock or fi re.

Do not connect AC power supply to the transmission line terminal board.

Improper wiring can damage the entire system.

Connect the connector cord securely to the terminal.

Faulty installation can cause a fi re.

Do not modify power cable, use extension cable or branch wiring. Improper use may cause electric shock or fi re by poor connection, insuf fi cient insulation or over current.

Make sure to secure the insulation portion of the connector cable with the cord clamp. A damaged insulation can cause a short circuit.

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

Before servicing the unit, turn the power supply switch OFF. Then, do not touch electric parts for 10 minutes due to the risk of electric shock.

Always use a separate power supply line protected by a circuit breaker operating on all cables with a distance between contact of 3 mm for this unit.

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

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

If the supply cable is damaged, it must be replaced by the manufacturer, its service agent or similarly quali fi ed persons in order to avoid a hazard.

CAUTION

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

Connect the power cables in positive phase sequence. If they are connected in negative phase sequence, an error will be displayed. If there is a missing phase connection, the unit will not operate normally. Do not connect a N phase (neutral phase) cable to other phases (misconnection). Wrong wiring will lead to parts damage.

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

If the electrical power is inadequate, contact your electric power company.

Install a breaker (Included with earth leakage circuit breaker) in a location that is not exposed to high temperatures.

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

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

When the electrical switchboard is installed outdoors, place it under lock and key so that it is not easily accessible.

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

Always keep to the maximum length of the transmission cable. Exceeding the maximum length may lead to erroneous operation.

The static electricity that is charged to the human body can damage the control PC board when handling the control PC board for address setting, etc.

Please keep caution to the following points.

Provide the earthing (grounding) of Indoor unit, Outdoor unit and Option equipment.

Cut off the power supply (breaker).

Touch the metal section (such as the unpainted control box section) of the indoor or outdoor unit for more than 10 seconds. Discharge the static electricity in your body.

Never touch the component terminal or pattern on the PC board.

En-11

6. 2. Wiring method

The wiring example for RB units ,outdoor units and indoor units is shown in the fi gure.

To other refrigerant circuit outdoor unit

Power supply

400V 3Ø 50Hz

N

Power supply

400V 3Ø 50Hz

N

Power supply

400V 3Ø 50Hz

N

Breaker Breaker Breaker

Outdoor unit 1

(Master unit)

N

Power supply

Transmission

Outdoor unit 2

(Slave unit 1)

N

Power supply

Transmission

Outdoor unit 3

(Slave unit 2)

N

Power supply

Transmission

(*1:Cooling only)

Refrigerant piping

Power supply

L N

RB unit

IN/U

Power supply

L N

RB unit

IN/U

Breaker Breaker

Power supply

L N

Transmission

Indoor unit

Remote control

*1

L N

Power supply

230V 1Ø 50Hz

Power supply

L N

Transmission

Indoor unit

L N

Power supply

230V 1Ø 50Hz

Remote control

Transmission

Power supply

L N

Indoor unit

Remote control

Power supply

L N

Transmission

Indoor unit

Remote control

Power supply

L N

Transmission

Indoor unit

Remote control

Breaker Breaker Breaker Breaker

Breaker

L N

Power supply

230V 1Ø 50Hz

Remote control unit

L N

Power supply

230V 1Ø 50Hz

Remote controller

L N

Power supply

230V 1Ø 50Hz

Remote controller

L N

Power supply

230V 1Ø 50Hz

Remote controller

L N

Power supply

230V 1Ø 50Hz

Remote controller

• There are two types of remote controller: the 2-wire type and the 3-wire type. For details, see the relevant remote controller installation manual. (When connecting the 2-wire type remote controller, Y3 is not used.)

En-12

6. 3. Knockout hole

CAUTION

Seal the wiring route hole with putty (locally purchased) such that there are no gaps.

Small insects or animals that are trapped in the outdoor unit may cause a short circuit in the electrical component box.

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

After opening the knockout holes, remove burr on the edges, and attach the conduit or grommet edging (accessories) to prevent damaging the cables.

It is recommended to apply rust proof paint on the edges to prevent rust.

Electric wires can be connected from the front or from the left.

(Knockout holes are prepared so that wiring can be made from 2 different directions.)

Use the knockout holes on the front and the left separately when necessary.

< Left view >

Ø 50

Ø 34.5

Ø 43.7

< Front view >

Ø 50

Ø 34.5

Ø 22.2

Ø 43.7

Ø 22.2

(Unit: mm)

Length of the grommet edging

L

(Unit: mm)

Mounting the grommet edging

Knockout hole

Knockout hole diameter (mm)

Ø 50

Ø 43.7

Ø 34.5

Ø 22.2

Dimension L

(mm)

147

130

100

60

Grommet edging

(accessories)

6. 4. Selecting power supply cable and breaker

CAUTION

Obtain the distribution network operator's agreement about the power capacity of the power supply system, speci fi cation of the cable and the harmonic current, and etc. when you connect the outdoor unit with the power supply.

Regulation of wire size and circuit breaker differs from each locality, please refer in accordance with local rules.

Refer to the table for the wiring and breaker speci fi cations of each installation condition.

MODEL

AJTA72GALH

AJTA90GALH

AJT108GALH

AJT126GALH

Breaker (Time delay fuse or circuit capacity)

Fuse capacity (A) Leakage current

20

25 100mA

0.1sec or less

25

40

MODEL

AJTA72GALH

AJTA90GALH

AJT108GALH

AJT126GALH

Outdoor unit power supply cable

Power supply cable (mm 2 )

Ground wire (mm 2 )

Critical wiring length (m)

4 4 51

6

6

10

6

6

10

62

62

64

1) These values are recommended data.

2) Speci fi cation: Use conformed cord with Type 60245 IEC66

3) Max. wire length: Set a length so that the voltage drop is less than 2%. Increase the wire diameter when the wire length is long.

Fig. In case of connected outdoor unit

Transmission cable

230 V 1ø 50 Hz

GOOD

400 V 3ø 50 Hz

Breaker

Outdoor unit power supply cable

230 v 1ø 50 Hz

RB unit power supply cable

Breaker

Indoor unit power supply cable

Remote controller cable

(2) Selecting main breaker and main power supply cable when connecting multiple outdoor units

Main breaker: Main breaker ≥ Total Sub breaker (Refer to the table in item (1) for the sub breaker capacity)

Fig. In case of connected 3 outdoor unit

GOOD

Sub breaker

Main breaker

400 V 3ø

50 Hz

Outdoor unit power supply cable

(3) Example of bad breaker wiring

PROHIBITED

400 V 3ø

50 Hz

Breaker

PROHIBITED: install a breaker for each outdoor unit

Outdoor unit

Power supply cable

PROHIBITED: crossover power supply wiring prohibited

6. 5. Transmission line

CAUTION

• Caution when wiring cable

When stripping off the coating of lead wire, always use the exclusive tool such as a wire stripper. If there is no exclusive tool available necessarily, carefully strip the coating by a cutter etc. so that the conductive wire is not damaged.

If it is damaged, it may lead to an open circuit and a communication error.

• Pay attention to the following points while attaching wires on the terminal board.

Do not attach 2 wires on one side.

Do not twist wires.

Do not cross the wires.

Do not shorted at edge at root.

2pcs at one side Wires twisted 1 wire

PROHIBITED

Shorted at edge

PROHIBITED

Shorted at root

GOOD

2 wires

GOOD

PROHIBITED PROHIBITED

En-13

6. 5. 1. Transmission wiring speci

fi

cations

Follow the speci fi cations below for the transmission cable.

Transmission cable

Use Size

0.33mm

2

Wire type Remarks

22AWG LEVEL 4 (NEMA) non-polar 2core, twisted pair solid core diameter 0.65mm

LONWORKS ® compatible cable

Twisted pair with shielded type.

Use the shielded wire speci fi ed and always ground it both end.

6. 5. 2. Wiring rules

(1) Basic wiring rules

Total transmission line length: MAX 3600 m (A+C+D+E+F+G+H+J+K+N+W ≤ 3600)

Transmission line length between each unit : MAX 400 m

Transmission line length between outdoor units in a refrigerant system MAX 18 m (L

≤ 18 m , M ≤ 18 m)

Be sure to set 1 terminal resistor in a network segment..

The transmission cable connects indoor units belonging to the same RB group. The transmission cable cannot be used to connect indoor units belonging to different RB groups.

Transmission line

Refrigerant pipe

RB group1 RB group 2

GOOD

Transmission line

Refrigerant pipe

RB unit

(multi type)

RB group1 RB group 2

PROHIBITED

RB unit

(multi type)

L M

K N W

J

Transmission line

E

A (a to b)

System controller

Terminal resistor (a)

RB unit

C D

(b)

Indoor unit

H

G

F

Touch panel controller

(2) In the following cases, Signal Ampli fi er is required.

When the total length of the transmission line exceeded 500 m

(A+C+D+E+F+G+H+J+K+N ≥ 500 m)

When the total number of unit is over 64.

NS 1

K N

NS 2

W

J

P (a to c)

Terminal resistor

(a)

C D

NS 3

E

(c)

H

G

(b)

F

Q (c to b)

Signal ampli fi er

*P+C+D+E+J+K+N ≤ 500 m, Q+F+G+H ≤ 500 m

RB group1

RB group 2

RB group 3,4

Signal Ampli fi er

(Filter mode: on)

RB group1

RB group 2

RB group 3,4

PROHIBITED GOOD

• If there are more than 321 units(*1) within the network system, a signal ampli fi er

(with the fi lter mode: on) must be installed between the master outdoor units. See the Signal Ampli fi er Installation Manual and Design & Technical Manual for more information.

*1) Unit* means indoor unit, outdoor unit, Touch Panel Controller and System Controller, Signal Ampli fi er, single split adaptor, Network Convertor etc..

Do not use loop wiring. This may lead to parts damage and erroneous operation.

6. 5. 3. Enabling/Disabling automatic address setting

You can enable/disable automatic address setting for the indoor unit, RB unit and the signal ampli fi er.

To enable automatic address setting for the indoor unit, connect the indoor unit to outdoor units under the same refrigerant system.(Fig.4)

Example : Disable Automatic Address setting

Transmission line

Refrigerant system 1

Transmission line

Refrigerant system 2

Example : Enable Automatic Address setting

Refrigerant system 1

Transmission line

Transmission line

Refrigerant system 2

En-14

6. 6. Wiring procedure

• Remove the cover of the electrical compartment and follow the terminal plate to connect the electric cables to the terminal.

• After connecting the cables, secure them with the cable ties.

• Connect the cables without applying excessive tension.

Cable routing

Secure with a cable tie as shown in the fi gure below.

(1) Connecting the power supply cable

Caution when wiring cable

1) Use ring terminals with insulating sleeves as shown in the fi gure to connect to

the terminal block.

2) Securely clamp the ring terminals to the cables using an appropriate tool so

that the cables do not come loose.

3) Use the speci fi ed cables, 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 for the terminal screw tightening torques.

Strip 10 mm

Ring terminal

Connecting the power supply cable

Connecting the transmission cable

Cable

Screw with special washer

Ring terminal

Terminal block

Sleeve

Screw with special washer

Ring terminal

Cable

Cable tie

(Accessory)

Ring terminal: M8 Earth (Ground) cable

Cable guide

Cable clip

Cable tie *

(Accessory)

Cable clamp

Power supply cable routing

Transmission cable routing

* Tighten the cable tie fi rmly so that pulling force does not propagate to the terminal connection even if force of 100N is applied to the cable.

Connecting cables to the terminals

WARNING

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

Be sure fi ll the holes of power supply cable and transmission cable with putty (locally purchased).

If small animals such as insects enter the electrical component box, a short circuit may be caused.

M3 screw

M8 screw

Tightening torque

0.5 to 0.6 N·m (5 to 6 kgf·cm)

5.0 to 7.0 N·m (50 to 70 kgf·cm)

* Use a ring terminal to connect the electric cables to the power supply terminal board.

(2) Connecting the transmission cable

Shielding the transmission cable

Connect both ends of the shielded wire of the transmission cable to the earth terminal of the equipment or to the earth screw near the terminal.

Be very careful that the screws are not overly tightened as the wires may snap and the terminal may be damaged.

Wind with insulation tape to prevent short circuit

Use one side of the twisted-pair cable

Connect both ends of shielded wire to earth.

Be sure to use one side of a twisted-pair cable when using transmission cable with 2 sets of twisted-pair cables.

8 to 10 mm

IN RB

40 mm or more

Cable clip

Cable tie

(Accessory)

En-15

6. 7. External input and external output

6. 7. 1. Terminal position

Input 5 Input 4 Input 3 Input 1 Output 1

Output 2

P.C.B

Input 1

CN131

(Yellow)

Input 3

CN133

(White)

Input 4

CN134

(Red)

Input 5

CN135

(Orange)

CN135

(ORANGE)

CN134

(RED)

CN133

(WHITE)

Outdoor unit PC board

CN131

(YELLOW)

CN136

(BLACK)

CAUTION

Do not bundle the cable for base heater with other cables.

(Example)

In case of Outdoor unit

(1) Insert the connector to CN134 (Red) and CN135 (Orange) of control PC board.

(2) Fix it to the wire with the attached cable tie.

Clamp

CN135

(Orange)

CN115

(Black)

Clamp

CN134

(Red)

Cable tie

(Accessory)

Wire

▪ Do not clamp the base heater cable.

6. 7. 2. External input terminal

• Setting to low noise mode, outdoor unit operation peak control setting, emergency/ batch stop and electricity meter pulse are possible from the outside.

the Master unit is effective.

Wiring method and speci

fi

cations

* A twisted pair cable (0.33 mm cable is 150 m.

2 (22AWG)) should be used. Maximum length of pending on the number of cables to be installed

* For each input, pin No.1 is of positive polarity and pin No.2 is of ground level.

connected unit

Operation behavior

Each input terminal works as follows.

connected unit connected unit connected unit

Connector

Input signal

Status

Input 1

CN131 (Yellow)

OFF

ON

Normal operation

Low noise mode operation

Input 3

CN133 (White)

Input 4

CN134 (Red)

Input 5

CN135 (Orange) *3

OFF

ON

OFF

ON

No pulse

Pulse

Normal operation

Outdoor unit operation peak control

Normal operation

Batch stop or Emergency stop operation *1, *2

No information from electricity meter

Power usage information from electricity meter

Slave unit can connect only input5 (CN135).

Outdoor unit

Master Slave

O

O

O

O

O

The operations of each input terminal and the selection of function are set with the push button on the PC board of outdoor unit. About the setting, please refer to “7.4.

Push button setting” .

NOTE :

*1: Batch stop or Emergency stop pattern can be selected by outdoor unit PC board push button.

*2: The emergency stop function mounted in the V-II does not guarantee the regulations of each country. For this reason, suf fi cient checking is necessary regarding use.

Especially, since the fact that the equipment may not be emergency-stopped in the case of breaking of the wiring to the external input terminals and communication line, communication error due to noise, VRF external input circuit trouble, etc. must be considered, the provision of double measures that add direct interruption of the power supply by switch, etc. is recommended as a precaution.

*3: Pulse input to CN135 must be width 50ms or more, and must be interval 50ms or more.

6. 7. 3. External output terminal

• You can detect the operation condition of outdoor unit and the abnormal situation of both indoor and outdoor unit.

Wiring method and speci fi cations

Error status (Master unit only)

This output indicates the outdoor unit and connected indoor unit's "Normal" or "Error" status.

Operation status (Master unit only)

This output indicates the outdoor unit's "Operation" status.

Connector

CN136 (Black)

CN137 (Blue)

Output voltage

0 V

DC 12 to 24 V

0 V

DC 12 to 24 V

Normal

Error

Stop

Operation

Status

En-16

P.C.B

CN136

(Black) or CN137

(Blue)

+

1

2

*7

DC power supply

(External) 12 to 24 V

+

-

*5

Connected load

(Operation Indicator or

Error Indicator) connected unit

*6

Select a power supply capacity with an ample surplus for the connected load.

Provide a load resistance such that the current becomes 30 mA or less.

Do not impress a voltage exceeding 24 V across pins 1-2.

* A twisted pair cable (0.33 mm 2 (AWG22)) should be used. Maximum length of cable is 150 m.

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

6. 7. 4. Base heater terminal

This is the output signal for base heater. Output signal ON, when the outdoor temperature goes down below 2°C, and signal OFF at the outdoor temperature 4°C.

P.C.B

CN115

(Black)

*8 3

4

1

2

AC240 V

(For rated 415 V power supply)

Cable

(0.82 mm 2 (18AWG))

Base heater *9

* 8: Connect to pin 1 and pin 3. No connection pin 2 and pin 4.

7. FIELD SETTING

CAUTION

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

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

7. 1. Field setting switches

Remove the service panel of the outdoor unit and the cover of the electrical component box to access the PC board of the outdoor unit.

PC board switches for various settings and LED indicators are shown in the fi gure.

7. 2. DIP switch setting

7. 2. 1. List of Settings

SET3 and SET5 must be set for the DIP switch.

Con fi gure the settings before turning on the power. Settings for SET1, SET2, and

SET4 DIP switches are factory default ones. Do not change them.

Function DIP Switch

SET1 1-4

SET2

SET3

1-4

1

2

3

SET4

SET5

4

1-4

1-2

3

4

Forbidden

Forbidden

Outdoor unit address setting

Setting for number of slave units

Forbidden

Number of outdoor units installed

Forbidden

Terminal resistor setting

LED lamp

7 Segment

LED indicator

SW106

MODE

/EXIT

SELECT ENTER

POWER

MODE

ERROR

LED101

(GREEN)

LED102

(RED)

LED105 LED104

Rotary switch

SET 1 SET 2

X 10

REF AD

SET 3

X 1

SET 4

SW105

SW107

SW108

SW109

SW101 SW102 SW103 SW104

Push button

DIP switch

SET5

Outdoor unit PC board

7. 2. 2. Settings to be con

fi

gured locally

When 2 or 3 outdoor units are installed to 1 refrigerant system, set the address for each outdoor unit.

Set the address for all outdoor units.

1

SET3

2

Outdoor unit address

Remarks

OFF

OFF

ON

ON

OFF

ON

OFF

ON

2

-

0

1

Master unit (Factory setting)

Slave unit 1

Slave unit 2

Forbidden

(2) Number of slave units setting for outdoor unit

Set the number of slave units connected to 1 refrigerant system.

Set only the master unit.

3

OFF

SET3

4

OFF

OFF

ON

ON

ON

OFF

ON

Number of connectable outdoor units

0

1

2

-

Master unit only (Factory setting)

1 slave unit connected

2 slave unit connected

Forbidden

Remarks

The number of outdoor units installed in 1 refrigerant system must be set.

Set for all outdoor units.

SET5

Number of outdoor units Remarks

1

OFF

OFF

ON

ON

2

OFF

ON

OFF

ON

1

2

3

-

(Factory setting)

Forbidden

-

-

7. 2. 3. Terminal resistor setting

CAUTION

Be sure to set the terminal resistor according to speci fi cations.

Set the terminal resistor for every network segment (NS).

If terminal resistor is set in multiple devices, the overall communication system may be damaged.

If terminal resistor is not set in a device, abnormal communication may occur.

• Be sure to set 1 terminal resistor in a network segment. You can set the terminal resistor at the outdoor unit or signal ampli fi er.

• When setting the terminal resistor of a signal ampli fi er, refer to the installation manual of the signal ampli fi er.

• When setting multiple terminal resistors, take note of the following items.

1 How many network segments are there in a VRF system?

2 Where will you set the terminal resistors in a network segment? (Condition for 1 segment: Total number of outdoor and indoor units and signal ampli fi ers is less than 64, or the total length of the transmission cable is less than 500m)

3 How many outdoor units are connected to 1 refrigerant system?

En-17

Con fi gure the setting (DIP switch SET5) of the terminal resistor of the outdoor units as shown below from conditions 1 to 3 .

SET5

4

OFF

ON

Terminal resistor

Disable

Enable

Remarks

(Factory setting)

-

Figure: Terminal resistor setting

NS1 (Network segment 1)

(Set terminal resistor at outdoor units)

Terminal resistor: on

Master unit

Refrigerant system1

Terminal resistor: off

Master unit

Refrigerant system2

Master unit

Refrigerant system3

NS2 (Network segment 2) NS3 (Network segment 3) NS4 (Network segment 4)

Terminal resister: on

About the setting of terminal resistor

Outdoor unit (Master unit)

:on

:off

Signal ampli fi er

Install

Do not install

7. 3. Rotary switch setting

The rotary switch (REF AD) sets the refrigerant circuit address of the outdoor unit.

Con fi gure the settings only on the master unit of a refrigerant system.

If multiple refrigerant systems are connected, set the rotary switch (REF AD) as shown in the table below.

Refrigerant circuit address

97

4

98

99

2

3

0

1

×10

9

0

9

9

0

0

0

0

Rotary Switch Setting

REF AD

×1

7

4

8

9

2

3

0

1

Setting

Refrigerant circuit address

Setting range

0–99

Setting example

63

Rotary Switch (REF AD×1): Factory setting "0"

Rotary Switch (REF AD×10): Factory setting "0"

Type of switch

REF AD × 10 REF AD × 1

7. 4. Push button setting

Various functions can be set when necessary.

Perform settings after all indoor units have stopped operation.

Table. A: List of Settings

No Setting Item

Standard (40 to 65 m)

7 segment LED indicator

First 2 digits

Last 2 digits

Factory setting

0 0 

Short (less than 40 m)

00

Pipe length setting *1

Medium (65 to 90 m)

Long 1 (90 to 120 m)

0 0

0

0

0

1

2

3

Long 2 (120 to 150 m) 0 4

10

11

12

13

Pipe length means the length between master outdoor unit and the nearest indoor unit.

Sequential start shift *1

Normal

21 sec. Delay

42 sec. Delay

63 sec. Delay

Set this item when necessary.

(Forbidden)

1

0

0

0

0

2

3

0

1

The start-up timing of outdoor unit (compressor) can be set up so that it can delay several seconds.

This feature is useful when multiple number of outdoor units are installed and turned on at the same time to limit the starting current.

Cooling capacity shift *1

Normal mode

Save energy mode

High power mode 1

High power mode 2

1 1

0

0

0

0

0

1

2

3

0 4 (Forbidden)

Set this item when necessary.

Heating capacity shift *1

Normal mode

Save energy mode

High power mode 1

High power mode 2

1 2

0

0

0

0

0

1

2

3

1

0

3 0 0

1 4 0 0 

14

(Forbidden)

15

(Forbidden) 1 5 0 0 

20

22

23

Switching between batch stop or emergency stop *1

Batch stop

Emergency stop

2 0

0

0

0

1

This mode selects the pattern of the stop function to be operated by the external input terminal (CN134).

• Batch stop: The stop of all indoor units connected to same refrigerant system due to input signal coming from CN134.

• Emergency stop: When emergency stop is actuated, the indoor unit does not accept the operation command from the remote controller. On the other hand, when the emergency stop is released (no input from CN134), the air conditioner does not return to the original operation until the indoor unit is turned on by the remote controller.

Snow falling protection fan mode *1

Valid

Invalid

2 2

0

0

0

1

This mode operates the fans of outdoor units in order to prevent the units from stopping operation when they are covered by snow.

Interval setting for snow falling protection fan mode *1

Standard (30 minutes)

Short 1 (5 minutes)

Short 2 (10 minutes)

Short 3 (20 minutes)

2 3

0

0

0

0

0

1

2

3

When the snow falling protection fan mode is set, the operation interval of the fans of outdoor units can be selected.

En-18

24

25

Standard 0 0 

High static pressure mode

High static pressure 1

(equivalent to 0.12in WG

(30Pa))

High static pressure 2

(equivalent to 0.32in WG

(80Pa))

(Forbidden)

2 4

0

0

1

2

(Forbidden) 2 5

0

0

3

When installing a duct to the blow-off outlet of an outdoor unit, set the high static pressure mode according to the static pressure of the duct to be installed.

Furthermore, use this setting if the air blow of an outdoor unit is poor, such as when installed in a place with a low ceiling.

0 

2 6 0 0 

26

(Forbidden)

27

(Forbidden)

28

(Forbidden)

29

(Forbidden)

2

2

2

7

8

9

0

0

0

0

0

0

30

32

Energy saving level setting *1

Level 1 (stop)

Level 2 (operated at 40% capacity)

Level 3 (operated at 60% capacity)

Level 4 (operated at 80% capacity)

3 0

0

0

0

0

0

1

2

3

Level 5 (operated at

100% capacity)

0 4

The capacity limit can be selected by the external input terminal (CN133) when operating with the “Energy Saving Peak Cut function”.

The lower the level, the more the effect of energy saving, but the cooling/heating performance will also drop.

(Forbidden) 3 2 0 0 

33

(Forbidden) 3 3 0 0 

40

41

Capacity priority setting (in low noise mode) *1

Off (quiet priority)

On (capacity priority)

4 0

0

0

0

1

If the cooling/heating performance becomes insuf fi cient when the low noise mode is set, it is possible to set “capacity priority” that automatically cancels the low noise mode (once performance is restored, the mode will automatically return to the low noise mode).

Low noise mode setting *1

Off (Normal)

On (Low noise mode)

4 1

0

0

0

1

42

60

61

Low noise mode operation level setting *1

Level 1 (55 dB)

Level 2 (50 dB)

4 2

0

0

The noise level when operating in the low noise mode can be set.

Recovery operation

*1

On

Off

6 0

0

0

(Forbidden) 6 1 0

0

1

0

1

0

6 2 0 0

62

(Forbidden)

63

(Forbidden) 6 3 0 0

70

71

72

Electricity meter

No. setting 1 *2

Setting number (x00)

Setting number (x01)

······

Setting number (x98)

7 0

0

0

···

9

0

1

···

8

Setting number (x99) 9 9

Set the ones digit and tens digit of the No. of the electricity meter connected to

CN135.

Setting number (0xx)

Setting number (1xx)

0

0

0

1

Electricity meter

No. setting 2 *2

7 1

Setting number (2xx) 0 2

Set the hundreds digit of the No. of the electricity meter connected to CN135.

Setting number (xx00)

Electricity meter pulse setting 1 *3

Setting number (xx01)

······

Setting number (xx98)

7 2

0

0

···

9

0

1

···

8

Setting number (xx99) 9 9

Set the ones digit and tens digit of the No. of the electricity meter pulse setting connected to CN135.

73

Setting number (00xx)

Electricity meter pulse setting 2 *3

Setting number (01xx)

······

Setting number (98xx)

7 3 ···

9

0

0

···

8

0

1

Setting number (99xx) 9 9

Set the hundreds digit and thousands digit of the electricity meter pulse setting connected to CN135.

*1: Do not set this for outdoor units with Slave setting.

*2: When electricity meter No. is set to “000” and “201 to 299”, the pulses input to

CN135 become ineffective. Available setting number is "001" to "200"

*3: When the electricity meter pulse setting is set to “0000”, the pulses input to

CN135 become ineffective. Available setting number is "0001" to "9999"

(1) Turn on the power of the outdoor unit and enter standby mode.

POWER/MODE lamp lights up. (ERROR lamp is off.)

POWER/MODE lamp:

ON

POWER

MODE

ERROR

ERROR lamp: OFF

LED101

(GREEN)

LED105

LED102

(RED)

LED104

7 segment LED indicator:

OFF

MODE/EXIT button

MODE

/EXIT

SELECT ENTER

SW107 SW108 SW109

SELECT button ENTER button

Check the settings as there is an error in the settings for outdoor unit address (DIP switch

SET3-1, 2) or number of connected slave units (DIP switch SET3-3, 4).

POWER/MODE lamp:

ON

ERROR lamp:

Blinking

POWER

MODE

ERROR

LED101

(GREEN)

LED105

LED102

(RED)

LED104

7 segment LED indicator:

"-" display

MODE

/EXIT

SELECT ENTER

SW107 SW108 SW109

(2) Setting method

Use the “MODE/EXIT”, “SELECT”, and “ENTER” buttons to con fi gure settings according to the procedures below.

(If no setting is made, the factory default setting will be displayed.)

MODE/EXIT : Press the “MODE/EXIT” button.

SELECT

ENTER

ENTER

: Press the “SELECT” button.

: Press the “ENTER” button.

: Press the “ENTER” button for more than 3 seconds.

En-19

1: Function setting

First 2 digits Last 2 digits

7 segment LED indicator

(LED105, LED104)

MODE/EXIT

(Flashing)

SELECT

(When [F3] to [F9] are displayed, continue to press the “SELECT” button until [F2] is displayed.)

ENTER

2: Setting the fi rst 2 digits

3: Setting the last 2 digits

Continue to press the “SELECT” button until the desired number appears at the last 2 digits.

ENTER

MODE/EXIT

SELECT

SELECT

SELECT

SELECT

Every press of the

“SELECT” button will change the setting number for the fi rst 2 digits.

SELECT

SELECT

7. 5. Signal ampli

fi

er address setting

7. 5. 1. Signal ampli

fi

er address setting

When using signal ampli fi ers, the address for signal ampli fi ers must be set.

The address for signal ampli fi ers can be set automatically from 1 outdoor unit (master unit) on the network.

Refer to the next section “Fig. Wiring example for automatic address setting” for the wiring example.

(For manual setting of address, refer to the signal ampli fi er installation manual.)

7. 5. 2. Procedures to enable automatic address setting on signal ampli

fi

er

When setting the address of the signal ampli fi er, please use the factory setting. (See the installation manual of the signal ampli fi er)

When the system is normal, nothing will be displayed on the 7 segment indicator.

When ERROR is displayed, inspect the units.

Use the “MODE/EXIT”, “SELECT”, and “ENTER”, and ENTER buttons on the outdoor unit PC board to con fi gure settings according to the procedures below.

1: Function setting

First 2 digits Last 2 digits

(The indicator when the main power is turned on)

MODE/EXIT

SELECT

ENTER

SELECT

(When [F4] to [F9] are displayed, continue to press the “SELECT” button until [F3] is displayed.)

ENTER

Automatic address setting for signal amplifiers

SELECT

ENTER

Press the “SELECT” button until

“10” is displayed.

Press the “ENTER” button for more than 3 seconds.

SELECT

MODE/EXIT

Setting is complete when the lamp lights up

Press “ENTER” button to return to “2. Setting the first 2 digits” (If there is no operation for

5 seconds after the setting, the indicator will return to “2: Setting the first 2 digits”.)

ENTER

MODE/EXIT SELECT

SELECT

(Continue to press the

“SELECT” button until the desired number appears at the last 2 digits.)

ENTER

Setting is complete when the lamp lights up

Press “ENTER” button to return to “2. Setting the fi rst 2 digits” (If there is no operation for 5 seconds after the setting, the indicator will return to

“2: Setting the fi rst 2 digits”.)

ENTER

Setting is complete when the number of units is displayed

End

MODE/EXIT

7. 6. Indoor unit address setting

7. 6. 1. Indoor unit address setting

Address must be set for the indoor unit.

Manual setting → • the indoor unit installation manual.

controller installation manual.

Automatic setting → • fi gure below.

Operate using the master outdoor unit of each refrigerant system.

EXIT: Press the “MODE/EXIT” button to cancel the setting mode.

En-20

Fig. Wiring example for automatic address setting

(1) Signal ampli fi er wiring example

(2)(3) Indoor unit wiring example

(Connect the indoor and outdoor units of the same refrigerant system as shown below.)

(1) Signal ampli fi er

Refrigerant system1

2 12 8 21 4 1 26 3

(2)

Master unit

Refrigerant system2

Master unit

3 1 4 25 6 8 17 11 28

(3)

NOTE: installed to the same refrigerant system. When network is connected to other refrigerant systems, the automatic address function cannot be used.

• fi gured automatically cannot be assigned in the order when they are installed. (Refer to the indoor unit installation manual for the procedures to check the addresses.)

7. 6. 2. Procedures to enable automatic address setting on indoor units

Check that the rotary switch IU AD on the indoor unit PC board is set to “00”.If it is not set to “00”, it means the address of that device is not set. (Factory default is “00”).

Turn on the power of the indoor and outdoor units.

When the system is normal, nothing will be displayed on the 7 segment LED indicator.

When ERROR is displayed, inspect the units.

Use the “MODE/EXIT”, “SELECT”, and “ENTER” buttons on the outdoor unit PC board to con fi gure settings according to the procedures below.

1: Function setting

First 2 digits Last 2 digits

(The indicator when the main power is turned on)

MODE/EXIT

7. 7. RB unit address setting

CAUTION

After the address con fi guration is complete for the indoor and outdoor units as well as for the signal ampli fi er, con fi gure the RB unit address settings.

7. 7. 1. RB unit address setting

Address must be set for the RB unit.

Check the wiring. (Refer to 6.5 Transmission Line)

Manual setting → •

RB unit installation manual.

Automatic setting → • system.

7. 7. 2. Procedures to enable automatic address setting on RB units

Check that the rotary switch REF AD and RB AD on the RB unit PC board is set to “00”.

If it is not set to “00”, it means the address of that device is not set. (Factory default is

“00”).

Turn on the power of the RB units, indoor and outdoor units.

When the system is normal, nothing will be displayed on the 7 segment LED indicator.

When ERROR is displayed, inspect the units.

Use the “MODE/EXIT”, “SELECT”, and “ENTER” buttons on the outdoor unit PC board to con fi gure settings according to the procedures below.

1: Function setting

First 2 digits Last 2 digits

(The indicator when the main power is turned on)

MODE/EXIT

SELECT

SELECT

SELECT

(When [F4] to [F9] are displayed, continue to press the “SELECT” button until [F3] is displayed.)

ENTER

Automatic address setting for RB units

SELECT

(When [F4] to [F9] are displayed, continue to press the “SELECT” button until [F3] is displayed.)

ENTER

Automatic address setting for indoor units

SELECT

Press the SELECT button until

“11” is displayed.

ENTER Press the “ENTER” button for more than 3 seconds.

ENTER

The number of indoor units with normal settings will be displayed at the fi rst 2 digits of the 7 segment LED indicator. The number of indoor units with error will be displayed at the last 2 digits.

NOTE: After the “ENTER” button is pressed, the end processing will occur for about 30 seconds. During this period, the

7 segment will blink.

End

SELECT

ENTER

ENTER

Press the SELECT button until “22” is displayed.

Press the “ENTER” button for more than 3 seconds.

The number of RB units for which automatic address setting was successful will be shown in the fi rst two digits. The number of RB units for which it was unsuccessful will be shown in the last two digits.

NOTE: Incorrect con fi guration of the rotary switch "RB_AD" or "REF AD" on the RB unit PC board or incorrect wiring may lead to automatic address setting failure.

End

En-21

7. 8. Resistance measurement of transmission cable

(Measure with breaker OFF)

CAUTION

Do not turn on the power if the resistance between the terminals of the transmission cable is abnormal. Otherwise, the circuit board may be damaged.

Measure the resistance between 2 terminals of a transmission cable.

(1) Transmission cable connecting indoor units, outdoor units, and signal ampli fi ers

Measure the resistance of the signal ampli fi er terminal and the terminal of the indoor and outdoor units connected farthest away from the device where terminal resistor is measured.

A value from the table is displayed, depending on the distance from the signal ampli fi er and the device where the terminal resistor is set.

This value is an estimate.

(2) Transmission cable connecting outdoor units in a refrigerant system

The resistance between the terminals of the transmission cable is 45-60 Ω .

This value is an estimate.

0 ~ 50

50

60

70

80

90

100

110

120

130

140

150

160

170

180

190 ~

1K ~ ∞

Distance from termination resistor (m)

0 ~100 ~ 200 ~ 300 ~400 ~500

A short circuit somewhere or 2 or more termination resistors are connected

Faulty contact or wiring length over 500 m

Faulty contact, open circuit, or no termination resistor

8. PIPE INSTALLATION II

Fig. A Connection system

A) In case of connected 1 outdoor unit

Outdoor unit

Pressure gauge

Pressure regulating valve

RB unit

Indoor unit

Vacuum pump

Scale

B) In case of connected many outdoor units

Outdoor unit Outdoor unit

Pressure regulating valve

Pressure gauge

RB unit

Indoor unit

Nitrogen

Vacuum pump

Scale

Nitrogen

Fig. B

Charging cap

Valve

Spindle

Open Open

Hexagon wrench

Cap

Close Close

Table. A

Valve type

Liquid

Suction gas

Discharge gas

Spindle

9.0 to 12.0 N·m

(90 to 120 kgf·cm)

27.0 to 33.0 N·m

(270 to 330 kgf·cm)

Cap

20.0 to 24.0 N·m

(200 to 240 kgf·cm)

25.0 to 30.0 N·m

(250 to 300 kgf·cm)

Charging cap

12.5 to 16.0 N·m

(125 to 160 kgf·cm)

12.5 to 16.0 N·m

(125 to 160 kgf·cm)

8. 1. Sealing test

CAUTION

• Use only nitrogen gas.

Never use refrigerant gas, oxygen, in fl ammable gas or poisonous gas to pressurize the system. (If oxygen is used. There is danger of an explosion.)

• Do not shock during sealing test.

It can rupture the pipes and cause serious injury.

• Do not turn on the power unless all operations are complete.

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

After connecting the pipes, perform a sealing test.

Recheck that the spindle of the 3-way valve are closed before performing a sealing test. (Fig. B)

Pour nitrogen gas through both the liquid pipe and the gas pipe.

Pressurize nitrogen gas to 4.2 MPa to perform the sealing test.

Check all fl are connection areas and brazed areas.

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 did not decreased.

* When the outdoor temperature changes 5 °C, the test pressure changes 0.05

MPa.

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

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

* Decrease the pressure of nitrogen gas before brazing

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

Release the nitrogen gas slowly.

8. 2. Vacuum process

CAUTION

Do not turn on the power unless all operations are complete.

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

• If moisture enter the piping, follow below. (i.e., if doing work during the rainy season, if the actual work takes long enough that condensation may form on the inside of the pipes, if rain might enter the pipes during work, etc.) vacuum breakdown) with nitrogen gas, then depressurize down to -100.7kPa

(-755mmHg) for an hour using the vacuum pump (vacuum process).

• If the pressure does not reach -100.7kPa (-755mmHg) even after depressurizing for at least 2 hours, repeat the vacuum breakdown - vacuum process.

After vacuum process, maintain the vacuum for an hour and make sure the pressure does not rise by monitoring with a vacuum gauge.

Evacuation procedure

1) Remove the caps of the gas pipe and liquid pipe and check that the valves are closed.

2) Remove the charging cap.

3) Connect a vacuum pump and a pressure gauge to a charging hose and connect it to the charging port.

4) Activate the vacuum pump and vacuum the indoor unit and connection piping until the pressure gauge becomes -100.7kPa (-755mmHg).

Evacuate from both the gas pipe and the liquid pipe.

5) Continue evacuating the system for 1 hour after the pressure gauge reads

-100.7kPa (-755mmHg).

6) Remove the charging hose and reinstall the charging cap.

En-22

8. 3. Additional charging

CAUTION

Do not turn on the power unless all operations are complete.

After evacuating the system, add refrigerant.

Do not charge the system with a refrigerant other than R410A.

Always keep to the limit on the total amount of refrigerant. Exceeding the limit on the total amount of refrigerant will lead to malfunction during charging of refrigerant.

Do not reuse recovered refrigerant.

Use an electronic scale to measure the charging amount of refrigerant.

Adding more refrigerant than the speci fi ed amount will cause a malfunction.

Charge refrigerant using the liquid pipe.

Adding refrigerant through the gas pipe will cause a malfunction.

Add refrigerant by charging the system with the refrigerant in the liquid state. If the refrigerant cylinder is equipped with a siphon, it is not necessary to place the cylinder upright.

8. 3. 1. Procedure for charging the system with refrigerant

1) Remove the charging cap from the liquid pipe. Use standard refrigeration practices when charging refrigerant.

2) Attach a charging hose to the refrigerant cylinder, and connect it to the charging port.

3) Add refrigerant by calculating the additional refrigerant volume in accordance with the calculation formula indicated below.

4) Remove the charging cap and install the charging hose.

5) Remove the body caps (suction gas pipe, discharge gas pipe and liquid pipe), and open the valves.

6) Close the body caps.

7) After adding refrigerant, indicate the added charging volume on the unit.

* Tighten the body caps and charging caps to the torque values speci fi ed in the

Table A.

To open and close the valves, Use an M4 hexagon wrench for liquid pipe.

Use an M8 hexagon wrench for suction gas pipe and discharge gas pipe.

* * If you can not charge the speci fi ed amount of refrigerant with the above method, be sure to charge the refrigerant through the gas pipe while operating in cooling mode. In order to prevent liquid backfl ow, carefully operate the refrigerant cylinder valve so that the refrigerant will fl ow in certain part at a time.

8. 3. 2. Checking total amount of refrigerant and calculating the amount of refrigerant charge to be added

• The amount of refrigerant charge to be added is the total value of the basic refrigerant charge amount and the value calculated from the length of the liquid pipe.

• Round up the value to 2 decimal places.

Model

AJTA72GALH

AJTA90GALH

AJT108GALH

AJT126GALH

Ø6.35

Ø9.52

Ø12.70

Ø15.88

Ø19.05

HP

8HP

10HP

12HP

14HP

Diameter of liquid pipe (mm) d

Factory charged amount (kg)

11.8

11.8

11.8

11.8

a

Additional amount for outdoor unit (kg)

3.0

3.0

6.8

6.8

b

Additional amount for pipe length (kg/m)

0.021

0.058

0.114

0.178

0.268

(1) Calculation of additional amount for outdoor unit

A = a

Outdoor unit1 additional amount for outdoor unit

+ a

Outdoor unit2 additional amount for outdoor unit

+ kg kg a

Outdoor unit3 additional amount for outdoor unit

=

Total

kg kg

(2) Calculation of additional amount for pipe length

B =

Total length of ø19.05 mm liquid pipe m b

× 0.268

(kg/m)

Total length of

ø15.88 mm liquid

+ pipe m kg b

× 0.178

(kg/m)

+ kg

Total length of

ø12.70 mm liquid pipe m b

× 0.114

(kg/m)

Total length of

ø9.52 mm liquid

+ pipe m kg b

× 0.058

(kg/m)

+ kg

Total length of

ø6.35 mm liquid pipe m b

× 0.021 (kg/

= m)

Total

kg kg

C=A+B = kg

(Round up C to 2 decimal place)

D = d

Outdoor unit1 factory charged amount

+ d

Outdoor unit2 factory charged amount

+ kg kg d

Outdoor unit3 factory charged amount

=

Total

kg kg

E=C+D= kg

NOTE : Check the total refrigerant amount under the following conditions

Condition

For 1 outdoor unit per refrigerant system :

Total amount of refrigerant ≤ 35kg

For 2 outdoor units per refrigerant system :

Total amount of refrigerant ≤ 70kg

For 3 outdoor units per refrigerant system :

Total amount of refrigerant ≤ 105kg

Computational formula

E ≤ 35kg

E ≤ 70kg

E ≤ 105kg

<Calculation>

connected to 1 system

(1) Calculation of additional amount for outdoor unit

A=3.0(kg)+3.0(kg)+3.0(kg)=9.0(kg)

(2) Calculation of additional amount for pipe length

If liquid pipe piping length is the following

ø 19.05 : 50m, ø15.88 : 25m, ø12.70 : 0m, ø9.52 : 20m, ø6.53 : 15m

Additional charge volume B=50(m)×0.268(kg/m)+25(m)×0.178(kg/m)

+0(m)×0.114(kg/m)+20(m)×0.058(kg/m)

+15(m)×0.021(kg/m)

=19.325kg

C=A+B =9.0(kg)+19.33(kg)=28.33(kg)

D=11.8(kg)+11.8(kg)+11.8(kg)=35.4 (kg)

(5) Check the total amount of refrigerant

When 3 outdoor units are connected to 1 system, the following condition must be satis fi ed.

Condition: E=C+D ≤ 105(kg)

Calculation: 28.33(kg)+35.4(kg)=63.73(kg)<105(kg)

→ No problem if the above condition is satis fi ed.

En-23

8. 4. Installing insulation

• Install insulation material after conducting the “8.1 Sealing test”.

• To prevent condensation and water droplets, install insulation material on the refrigerant pipe.

• Refer to the table to determine the thickness of the insulation material.

• 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.

Perform test operation for each refrigerant system.

You can set “cooling test run" or “heating test run” with the push button on the outdoor unit PC board.

Test operation setting method

Use the “MODE/EXIT”, “SELECT”, and “ENTER” buttons on the outdoor unit PC board to con fi gure settings according to the procedures below.

Function settings

First 2 digits Last 2 digits

MODE/EXIT

Insulation

SELECT

SELECT

Putty

Table. Selection of insulation

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

0.040W/(m·k))

Relative humidity

Pipe diameter (mm) 6.35

9.52

12.70

15.88

19.05

22.22

28.58

34.92

41.27

≤ 70%

8

9

10

10

10

11

11

11

12

Insulation material

Minimum thickness (mm)

≤ 75%

10

≤ 80%

13

11

12

12

13

13

14

14

15

14

15

16

16

17

18

18

19

≤ 85%

17

18

19

20

21

22

23

24

25

* When an ambient temperature and relative humidity exceed 32 °C, please strengthen heat insulation of refrigerant pipe.

9. TEST RUN

9. 1. Pre-test run check items

Before the test operation, check the following items.

1 Is there a gas leakage? (At pipe connections { fl ange connections and brazed areas})

2 Is the system charged with the speci fi ed volume of refrigerant?

3 Is the refrigerant circuit address correct?

4 Is a breaker installed at the power supply cable of every outdoor unit?

5 Are the cables connected to the terminals without looseness, and in accordance with the speci fi cations?

6 Are the initial settings of the switches of the outdoor unit correctly con fi gured?

7 Is the 3-way valve of the outdoor unit open? (suction gas pipe, discharge gas pipe and liquid pipe)

8 Is power supplied to the crank case heater for more than 12 hours? Electricity current in short period of time may result in compressor damage.

9 Are all the indoor units within the same coolant system connected to the power?

Operating indoor units which are not connected to the power may result in malfunctions.

After checking that the above items are all in order, refer to “9.2 Test operation method” to test operation of the unit.

If there are problems, adjust immediately and recheck.

9. 2. Test operation method

Be sure to con fi gure test run settings only when the outdoor unit has stopped operating.

• Depending on the communication status between the indoor and outdoor units, it may take several minutes for the system to start operating after settings for the test run are complete.

• After the test run settings are complete, all the outdoor units and the connected indoor units will start operating. Room temperature control will not activate during test operation (continuous operation).

• If a knocking sound can be heard in the liquid compression of the compressor, stop the unit immediately and then energize the crank case heater for a suf fi cient length of time (more than 12 hours) before restarting the operation.

ENTER

ENTER

Press the “ENTER” button for more than 3 seconds.

This will be displayed when the cooling test operation is complete.

This will be displayed after

5 seconds.

SELECT or ENTER

(When [F4] to [F9] are displayed, continue to press the SELECT button until [F3] is displayed.)

SELECT

Settings for starting test run operation

For heating operation, press the

“SELECT” button until “01” is displayed.

ENTER

Press the “ENTER” button for more than 3 seconds.

This will be displayed when the heating test operation is complete.

This will be displayed after

5 seconds.

SELECT or ENTER

Settings for stopping test run operation

ENTER

Press the “ENTER” button for more than 3 seconds.

This will be displayed when the cooling operation mode is canceled.

This will be displayed after

5 seconds.

ENTER

Press the “ENTER” button for more than 3 seconds.

This will be displayed when the heating operation mode is canceled.

This will be displayed after

5 seconds.

EXIT

MODE/EXIT or ENTER

After the test operation is complete, turn off the power. Attach the cover of the electrical compartment box and the front panel of the outdoor unit.

NOTE:

• Check that the indoor and outdoor units connected to the same refrigerant system are operating normally.

• When indoor or outdoor units are not operating, or when the indoor and outdoor units of other refrigerant systems are operating, the indoor/outdoor unit address or

DIP switch for the number of connected slave units are not con fi gured correctly.

• The system will not operate normally with an incorrect DIP switch setting.

Stop the system immediately and recheck the DIP switch setting.

En-24

1

2

3

4

5

6

9. 3. Checklist

Check description

High and low pressure values are normal.

Drain water is discharged smoothly through the drain hose.

Indoor and outdoor unit fans are operating.

Compressor operates after the indoor unit operates.

Difference between inlet and outlet temperatures is normal.

Error is not displayed

Check method

Check it with a pressure gauge.

Check it by pouring water.

Check them visually.

Check the operating sound.

Measure the inlet and outlet temperatures.

Check the 7 segment LED indicator

Criteria

Cooling: low pressure approx. 0.8 MPa

Heating: high pressure approx. 3.0 MPa

Temperature difference 10 degrees

Error blinking or no error code display

10. LED STATUS

You can determine the operating status by the lighting up and blinking of the 7 segment LED indicator.

Check the status using the table below.

10. 1. Normal operation codes

Mode

Operation

Code

C L

H t

Description

Cooling

Heating o r During oil recovery operation d F During defrosting operation

P C During peak cut operation

L n During low noise operation

S n During setting of snowfall mode

10. 2. Error codes

Mode

Communication error

Code Description

E 1 3. 1 Communication error between outdoor units

E 1 4. 1 Outdoor unit network communication 1 error

E 1 4. 2 Outdoor unit network communication 2 error

E 1 4. 5 The number of indoor unit shortage

Function setting error

E 2 8. 1 Auto address setting error

E 2 8. 4 Signal ampli fi er auto address error

Indoor unit actuator error E 5 U. 1 Indoor unit miscellaneous error

E 6 1. 5 Outdoor unit reverse phase, missing phase wire error

E 6 2. 3 Outdoor unit EEPROM access error

E 6 2. 6 Outdoor unit inverters communication error

E 6 2. 8 Outdoor unit EEPROM data corruption error

Outdoor unit PCB/electrical component/switch error

E 6 3. 1 Outdoor unit inverter error

E 6 7. 2

E 6 8. 2

E 6 9. 1

Outdoor unit inverter PCB power short interruption error

Outdoor unit rush current limiting resister temp. rise error (protective operation)

Outdoor unit transmission PCB parallel communication error

Outdoor unit sensor error

Outdoor unit actuator error

Refrigerant system error

E 7 1. 1 Outdoor unit discharge thermistor 1 error

E 7 2. 1 Outdoor unit compressor temp. sensor 1 error

E 7 3. 4 Outdoor unit heat ex. 1 gas temp. sensor error

E 7 3. 5 Outdoor unit heat ex. 1 liquid temp. sensor error

E 7 3. 6 Outdoor unit heat ex. 2 gas temp. sensor error

E 7 3. 7 Outdoor unit heat ex. 2 liquid temp. sensor error

E 7 4. 1 Outside air thermistor error

E 7 5. 1 Outdoor unit suction gas thermistor error

E 7 7. 1 Outdoor unit heat sink thermistor error

E 8 2. 2

Outdoor unit sub-cool heat ex. gas outlet thermistor error

E 8 3. 1 Outdoor unit liquid pipe thermistor 1 error

E 8 3. 2 Outdoor unit liquid pipe thermistor 2 error

E 8 4. 1 Outdoor unit current sensor 1 error (permanent stop)

E 8 6. 1 Outdoor unit discharge pressure sensor error

E 8 6. 3 Outdoor unit suction pressure sensor error

E 8 6. 4 Outdoor unit high pressure switch 1 error

E 9 3. 1 Outdoor unit inverter compressor start up error

E 9 4. 1 Outdoor unit trip detection

E 9 5. 5 Outdoor unit compressor motor loss of synchronization

E 9 7. 1 Outdoor unit fan motor lock error

E 9 7. 5

Outdoor unit fan motor temperature error (protective action)

E 9 7. 9 Outdoor unit fan motor driver error

E 9 A. 1 Outdoor unit coil 1 (expansion valve 1) error

E 9 A. 2 Outdoor unit coil 2 (expansion valve 2) error

E 9 A. 3 Outdoor unit coil 3 (expansion valve 3) error

E 9 U. 2 Outdoor slave unit error

E A 1. 1 Outdoor unit discharge temperature 1 error

E A 3. 1 Outdoor unit compressor 1 temperature error

E A 4. 1 Outdoor unit high pressure error

E A 4. 2 Outdoor unit high pressure protection 1

E A 5. 1 Outdoor unit low pressure error

E A 6. 3 Outdoor heat exchanger 1 gas temperature error

E A 6. 4 Outdoor heat exchanger 2 gas temperature error

E A C. 4 Outdoor unit heat sink temperature error

7 segment LED indicator:

㪘㪑

㪃㪃

㪚㪑

㪜㪑

㪝㪑

㪈㪑

㪉㪑

㪊㪑

㪋㪑

㪟㪑

㪡㪑

㪌㪑

㪍㪑

㪣㪑

㪎㪑

㪪㪑

㪏㪑

㪧㪑

㪬㪑

㪐㪑

㪇㪑

㪻㪑

㫅㪑

㫆㪑

㫉㪑 㫋㪑

11. INFORMATION

Main contents of label

Item

1. Model name

2. Serial number

3. Electric characteristics

4. Weight

5. Capacity

6. Current

7. Input power

8. Max. Current

9. Air circulation

10. Noise level

11. Refrigerant

Detail

Model name

Serial number

Phase, rated voltage, and frequency

Product weight

Cooling/heating capacity under cooling/ heating condition (refer to item 15)

Electric current during cooling/heating operation under cooling/heating condition

(refer to item 15)

Input during cooling/heating operation under cooling/heating condition (refer to item 15)

Maximum electric current (temperature condition is max. cooling condition [refer to item 16])

Air circulation

Noise level

Refrigerant type and initial charging amount

En-25

Item

12. Max. pressure (HP/LP)

13. Protection

14. Working temperature

15. Condition of cooling/heating

16. Condition of max. cooling

17. Manufacture year

18. Origin

19. Manufacturer

Detail

Means pressure of High Pressure side/

Low Pressure side

Protection level against dust and water

Working temperature

Dry-bulb temperature and wet-bulb temperature under standard cooling/ heating condition

Dry-bulb temperature and wet-bulb temperature at maximum electric current and input

Manufacture year

Origin country

Manufacturer

FUJITSU GENERAL LIMITED

Address : 3-3-17, Suenaga, Takatsu-ku,

Kawasaki 213-8502, Japan

Label

En-26

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Key Features

  • High energy efficiency and low operating costs
  • Wide operating range for reliable performance in various climates
  • Advanced control features for precise temperature management
  • Compact design and low noise operation
  • Easy installation and maintenance
  • Durable construction for long-lasting performance

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Frequently Answers and Questions

Where can I find information about using R410A refrigerant with this outdoor unit?
Refer to the section 'Caution when using R410A refrigerant' in the installation manual.
What type of power supply cable and breaker are required for this outdoor unit?
The required power supply cable and breaker information can be found in the 'Selecting power supply cable and breaker' section of the installation manual.
How do I set the indoor unit address?
The indoor unit address can be set using the procedure outlined in the 'Indoor unit address setting' section of the installation manual.