INSTALLATION MANUAL

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OUTDOOR UNIT
For authorized service personnel only.

INSTALLATIONSANLEITUNG

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AUSSENGERÄT
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MANUEL D’INSTALLATION

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UNITÉ EXTÉRIEURE
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MANUAL DE INSTALACIÓN

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UNIDAD EXTERIOR
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AJY040LELAH
AJY045LELAH MANUALE D’INSTALLAZIONE

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AJY054LELAH UNITÀ ESTERNA
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MANUAL DE INSTALAÇÃO

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[Original instructions]

PART NO. 9380545163-02

9380545163-02_IM.indb i 5/17/2018 14:56:19

 INSTALLATION MANUAL 1. SAFETY PRECAUTIONS
OUTDOOR UNIT
• Be sure to read this Installation manual thoroughly before installation.
PART NO. 9380545163-02 • The warnings and precautions indicated in this Installation manual contain important
information pertaining to your safety. Be sure to observe them.
Contents • 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.
1. SAFETY PRECAUTIONS ………………………………………………………………… 1 • Please pass this Installation manual together with the Operating manual to the custom-
er.
2. ABOUT THIS PRODUCT ………………………………………………………………… 2 Please ask the customer to keep the Operating manual and Installation manual at hand
2.1. Precautions for using R410A refrigerant ………………………………………… 2 for future reference during the moving or repair of the main unit.
2.2. Special tools for R410A …………………………………………………………… 2
2.3. Accessories ………………………………………………………………………… 2 This mark indicates procedures which, if improperly per-
WARNING formed, might lead to the death or serious injury of the user.
2.4. Optional parts ……………………………………………………………………… 3
Consult the retail store or professional technicians to install the main unit according to
3. INSTALLATION WORK …………………………………………………………………… 3 the Installation manual.
Improper installation will cause serious accidents such as refrigerant leakage, water
3.1. Selecting an installation location ………………………………………………… 3
leakage, electric shock, and fire.
3.2. Drain processing …………………………………………………………………… 3
Manufacturer's guarantee will be invalid when instructions in the Installation manual are
3.3. Installation dimensions …………………………………………………………… 3 ignored during installation.
3.4. Transporting the unit ……………………………………………………………… 4
For installation purposes, be sure to use the parts supplied by the manufacturer or other
3.5. Installing the unit …………………………………………………………………… 4
prescribed parts.
Using non-specified parts will cause serious accidents such as falling unit, refrigerant
4. SYSTEM CONFIGURATION ……………………………………………………………… 5
leakage, water leakage, electric shock, and fire.
4.1. System configuration ……………………………………………………………… 5
To install a unit that uses the R410A refrigerant, use dedicated tools and piping materi-
4.2. Pipe selection ……………………………………………………………………… 5
als that have been manufactured specifically for R410A use.
4.3. Protection of pipes ………………………………………………………………… 5
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
5. PIPE INSTALLATION ……………………………………………………………………… 6
rupture or injury.
5.1. Brazing ……………………………………………………………………………… 6 It will also cause serious accidents such as refrigerant leakage, water leakage, electric
5.2. Indoor unit pipe connections ……………………………………………………… 6 shock, and fire.
5.3. Opening the knockout hole ……………………………………………………… 6 Do not use this equipment with air or any other unspecified refrigerant in the refrigerant
5.4. Pipe connection …………………………………………………………………… 7 lines.
Excess pressure can cause a rupture.
6. ELECTRICAL WIRING …………………………………………………………………… 8
Be sure to install the unit as prescribed, so that it can withstand earthquakes and
6.1. The precautions of electrical wiring ……………………………………………… 8 typhoons or other strong winds.
6.2. Knockout hole ……………………………………………………………………… 8 Improper installation can cause the unit to topple or fall, or other accidents.
6.3. Selecting power supply cable and breaker ……………………………………… 8
Ensure that the outdoor unit is securely installed at a place that can withstand the weight
6.4. Transmission line …………………………………………………………………… 9 of the unit.
6.5. Wiring method ……………………………………………………………………… 9 Improper installation will cause injuries caused by falling unit.
6.6. External input and external output …………………………………………… 10
If there is a refrigerant leakage, make sure that it does not exceed the concentration
7. FIELD SETTING ………………………………………………………………………… 11 limit.
If a refrigerant leakage exceeds the concentration limit, it can lead to accidents such as
7.1. Field setting switches …………………………………………………………… 11 oxygen starvation.
7.2. DIP switch setting ……………………………………………………………… 11
If a refrigerant leakage occurs during operation, immediately vacate the premises and
7.3. Rotary switch setting …………………………………………………………… 12
thoroughly ventilate the area.
7.4. Push button setting ……………………………………………………………… 12 If the refrigerant is exposed to fire, it will create a hazardous gas.
7.5. Address setting for signal amplifiers …………………………………………… 13
7.6. Indoor unit address setting ……………………………………………………… 14 Electrical work must be performed in accordance with this Installation manual by a
person certified under the national or regional regulations. Be sure to use a dedicated
7.7. Resistance measurement of transmission cable
circuit for the unit.
(Measure with breaker OFF) …………………………………………………… 14 An insufficient power supply circuit or improperly performed electrical work can cause
serious accidents such as electric shock or fire.
8. PIPE INSTALLATION II ………………………………………………………………… 15
For wiring, use the prescribed type of cables, connect them securely, making sure that
8.1. Sealing test ……………………………………………………………………… 15
there are no external forces of the cables applied to the terminal connections.
8.2. Vacuum process ………………………………………………………………… 15 Improperly connected or secured cables can cause serious accidents such as overheat-
8.3. Additional charging ……………………………………………………………… 15 ing the terminals, electric shock, or fire.
8.4. Installing insulation ……………………………………………………………… 16
Securely install the electrical box cover on the unit.
8.5. Filling with putty ………………………………………………………………… 16
An improperly installed electrical box cover can cause serious accidents such as electric
shock or fire through exposure to dust or water.
9. TEST RUN ……………………………………………………………………………… 16
Do not turn ON the power until all work has been completed.
9.1. Indoor unit connection check …………………………………………………… 16
Turning ON the power before the work is completed can cause serious accidents such
9.2. Test run …………………………………………………………………………… 17
as electric shock or fire.
9.3. Test run method ………………………………………………………………… 17
9.4. Checklist ………………………………………………………………………… 18 After the installation, make sure there is no refrigerant leakage.
If the refrigerant leaks into the room and becomes exposed to a source of fire such as a
10. LED STATUS …………………………………………………………………………… 18 fan heater, stove, or burner, it will create a hazardous gas.

10.1. Normal operation codes ………………………………………………………… 18 Use a wall hole pipe. Otherwise, it may cause a short circuit.
10.2. Error codes ……………………………………………………………………… 18
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.
11. INFORMATION ………………………………………………………………………… 18
Use only a specified power cable. Poor connection, poor insulation, and exceeding the
allowable current will lead to electric shock and fire.
Attach the connecting cables securely to the terminal. Or secure it firmly with a “wiring
suppressor”.
Loose connection will lead to malfunction, electric shock, and fire.
Install a breaker (Included with earth leakage circuit breaker) to cut off all AC main cur-
rent at the same time.
If you do not install a breaker, it may cause electric shock and fire.
During installation, make sure that the refrigerant pipe is attached firmly before you run
the compressor.
Do not operate the compressor under the condition of refrigerant piping not attached
properly with 2-way or 3-way valve open. This may cause abnormal pressure in the
refrigeration cycle that leads to rupture and even injury.
During the pump-down operation, make sure that the compressor is turned off be-
fore 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.

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 This mark indicates procedures which, if improperly per- 2. ABOUT THIS PRODUCT
CAUTION formed, might possibly result in personal harm to the user, or
damage to property.
2.1. Precautions for using R410A refrigerant
This unit must be installed by qualified personnel with a capacity certificate for handling
refrigerant fluids. Refer to regulation and laws in use on installation place.
Pay careful attention to the following points:
The installation must be carried out in compliance with regulations in force in the place
of installation and the installation instructions of the manufacturer. 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
This unit is part of a set constituting an air conditioner. It must not be installed alone or
TOOLS FOR R410A section.)
with non-authorized by the manufacturer.
Especially, when replacing a conventional refrigerant (other than R410A) model with
This unit contains no user-serviceable parts. Always consult authorized service person- a new refrigerant R410A model, always replace the conventional piping and flare nuts
nel to repairs. with the R410A piping and flare nuts.
When moving, consult authorized service personnel for disconnection and installation of Models that use refrigerant R410A have a different charging port thread diameter to pre-
the unit. vent 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.]
• This product is conformed to IEC/EN61000-3-2.
• This product is designed for professional use. Be more careful than the installation of the refrigerant (other than R410A) models, not
• On the power supply connection, obtain the connection permission of the distribution to enter foreign matters (oil, water, etc.) and other refrigerant into the piping. Also, when
network operator. storing the piping, securely seal the openings by pinching, taping, etc.
• Be sure to use a dedicated power circuit.
When charging the refrigerant, take into account the slight change in the composition of
Never use a power supply shared by another appliance.
the gas and liquid phases, and always charge from the liquid phase side whose compo-
Do not install the unit in the following areas: sition is stable.
• Area with high salt content, such as at the seaside.
It will deteriorate metal parts, causing the parts to fall or the unit to leak water.
• Area filled with mineral oil or containing a large amount of splashed oil or steam, such 2.2. Special tools for R410A
as a kitchen.
It will deteriorate plastic parts, causing the parts to fall or the unit to leak water. Tool name Contents of change for R22 tool
• Area that generates substances that adversely affect the equipment, such as sulfuric
gas, chlorine gas, acid, or alkali. Pressure is huge and cannot be measured with a conven-
It will cause the copper pipes and brazed joints to corrode, which can cause refriger- tional gauge. To prevent erroneous mixing of other refriger-
ant leakage. ants, the diameter of each port has been changed.
Gauge manifold
• Area containing equipment that generates electromagnetic interference. It is recommended to use a gauge manifold with a high
It will cause the control system to malfunction, preventing the unit from operating pressure display range -0.1 to 5.3 MPa and a low pressure
normally. display range -0.1 to 3.8 MPa.
• Area that can cause combustible gas to leak, contains suspended carbon fibers or To increase pressure resistance, the hose material and base
flammable dust, or volatile inflammables such as paint thinner or gasoline. Charging hose
size were changed.
If gas leaks and settles around the unit, it can cause a fire.
• Avoid installing the unit at places where it will come into contact with animals’ urine or A conventional vacuum pump can be used by installing a
ammonia. vacuum pump adapter.
• A conventional vacuum pump can be used by installing a
The units are not explosion proof and therefore should not be installed in explosive Vacuum pump vacuum pump adapter.
atmosphere. • Be sure that the pump oil does not back flow into the sys-
Do not use the unit for special purposes, such as storing food, raising animals, growing tem. Use one capable for vacuum suction of -100.7kPa (5
plants, or preserving precision devices or art objects. It can degrade the quality of the Ton, -755mmHg).
preserved or stored objects. Gas leakage detector Special gas leakage detector for HFC refrigerant R410A.
Ground the unit. Do not connect the ground cable to a gas pipe, water pipe, lightning
rod, or a telephone ground cable. Improper grounding may cause electric shock.
2.3. Accessories
Perform draining for the unit according to the Installation manual. Check that the water
is properly drained. Use connecting parts as required.
If the drain processing is improperly installed, water may drip down from the unit, wet- Do not throw away the connecting parts until the installation has been complete.
ting the furniture.
Name and shape Q’ty Application
Do not touch the fins with bare hands.
Specifications —
Be sure not to start or stop the operation of air conditioning with power breaker. Other- manual
wise, it may cause malfunction or water leakage. 1

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. Installation (This book)
manual
When energizing to the crankcase heater, please turn on the power 12 hours or earlier 1
before operation begins. When the energizing time is short, it may cause failure. Be-
sides, please do not turn off power during the busy season.
Drain cap For outdoor unit drain piping work
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, sen- 3
sory 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 instruc-
tion concerning the use of the device. Drain pipe For outdoor unit drain piping work

Cable tie For binding power cable and trans-

mission cable
2

Reducer For connecting gas pipe

(For 54 model)
1

One-touch bush For power supply cable and

connection cable installation
2

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 2.4. Optional parts 3.2. Drain processing

CAUTION CAUTION
The following parts are optional parts specific to R410A refrigerant. Perform drain work in accordance with this Manual, and ensure that the drain water is
Do not use parts other than those listed below. properly drained. If the drain work is not carried out correctly, water may drip down from
the unit, wetting the furniture.
2.4.1 Separation tube kit
When the outdoor temperature is 0 °C or less, do not use the accessory drain pipe
Separation tube uses the following parts.
and drain cap. If the drain pipe and drain cap are used, the drain water in the pipe may
Separation tube Total cooling capacity of indoor unit (kw) freeze in extremely cold weather.
UTP-AX054A ALL • As the drain water flows out of the outdoor unit during heating operation, install the
drain pipe and connect it to a commercial 16 mm hose.
2.4.2 Header • When installing the drain pipe, plug all the holes other than the drain pipe mounting
hole in the bottom of the outdoor unit with putty so there is no water leakage.
Header uses the following parts. A header is used for connecting the indoor units.
Header Drain pipe mounting hole
Total cooling capacity of indoor unit (kw)
3-6 Branches 3-8 Branches
UTR-H0906L UTR-H0908L ALL Base
Drain cap mounting hole ×3
2.4.3 External connect kit
Drain pipe
Model Usage Air

For External input (CN131, CN132, CN133, CN134)

UTY-XWZXZ6

227
For External output (Error status / CN136) (Operation status / CN137)

305
321
341
UTY-XWZXZF For External input (CN135)

UTY-XWZXZ9 For External output (Base heater / CN115)

50
278
3. INSTALLATION WORK 438
Please obtain the approval of the customer when selecting the location of installation and 622 Unit: mm
installing the main unit.

3.1. Selecting an installation location

3.3. Installation dimensions
WARNING
CAUTION
Install the unit in a location that can withstand its weight, and where it will not topple or
Provide sufficient installation space, such as transportation route, maintenance space,
fall.
ventilation space, refrigerant piping space, and passageways.
Calculate the proper refrigerant concentration if you will be installing it in an enclosed
location. Pay attention to the specifications of the installation space as shown in the figure. If
the unit is not installed according to specifications, it may cause short circuit or poor
Total amount of replenished refrigerant performance. The unit may be prone to lapse into non-operation due to high pressure
in refrigerant facility (kg) Refrigerant concentration (kg/m³) protection.
≤
Capacity of smallest room where unit (0.44 kg/m³)
When there is a wall in front of the unit, provide a space of 500 mm or more as mainte-
is installed (m³)
nance space.
If the results of the calculation exceed the concentration limit, increase the room surface When there is a wall at the right side of the unit, provide a space of 25 mm or more as
area or install a ventilation duct. maintenance space.
An outdoor temperature of 35°C (DB) in air-conditioned operation is assumed for the
CAUTION installation space in this item. If the outdoor temperature exceeds 35°C (DB) and the
outdoor unit is operating at a load exceeding its rated ability, provide a larger inlet
Please install the outdoor unit without slant. (within 3 degrees) space.
Install this unit in a location with good ventilation. If you are installing more outdoor units than indicated here, please ensure sufficient
If the unit must be installed in an area within easy reach of the general public, install as space or consult your distributing agent as it may affect the performance due to short
necessary a protective fence or the like to prevent their access. circuit and other problems.

Install the unit in an area that would not inconvenience your neighbors, as they could be Consider the transportation route, installation space, maintenance space, and access,
affected by the airflow coming out from the outlet, noise, or vibration. and install the unit in a location with sufficient space for the refrigerant piping.
If it must be installed in proximity to your neighbors, be sure to obtain their approval. Observe the installation space specifications
If the unit is installed in a cold region that is affected by snow accumulation, snow fall, or that are shown in the figures.
freezing, take appropriate measures to protect it from those elements. Keep the same space at rear air intake.
To ensure a stable operation, install inlet and outlet ducts. Provide the same space for the air intake at the
rear of the outdoor unit.
Install the unit in an area that would not cause problems even if the drain water is Air intake
If the installation is not performed according to
discharged from the unit. Otherwise, provide drainage that would not affect people or the specifications, it could cause a short circuit
objects. and result in a lack of operating performance.
Install the unit in an area that has no heat sources, vapors, or the risk of the leakage of As a result, the outdoor unit might easily be
flammable gas in the vicinity. stopped by high-pressure protection.
Rear view
Install the unit in an area that is away from the exhaust or vent ports that discharge
vapor, soot, dust, or debris. Installation methods not shown in the following examples are not recommended. Perfor-
mance may drop significantly.
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.

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 3.3.1 Single outdoor unit installation 3.3.3 Outdoor units installation in multi row
When the upward area is open (Unit: mm) * The following settings are not recommended in case of cooling by a low outside tem-
perature. (Unit: mm)
(1) Obstacles at rear only (2) Obstacles at rear and sides only (1) Single parallel unit arrangement (2) Multiple parallel unit arrangement

150 500
2000 or
more 3000 or
150 200 600 more
600
300 1000 1500
200
(3) Obstacles at front only (4) Obstacles at front and rear only
3.4. Transporting the unit

WARNING
Do not touch the fins. Otherwise, personal injury could result.
150
1000 or more
1000 or more CAUTION
When carrying the unit, hold the handles on the right and left sides and be careful.
When an obstruction is present also in the upward area (Unit: mm) If the outdoor unit is carried from the bottom, hands or fingers may be pinched.
(1) Obstacles at rear and above only (2) Obstacles at rear, sides, and above only • Carry slowly in the manner as shown on “Fig. B” holding the handles “Fig. A” in right and
left sides. (Be careful not to touch with hands or objects.)
• Be sure to hold the handles on the sides of the unit. Otherwise, the suction grilles on the
1000 1500 sides of the unit may be deformed.
Fig. A Fig. B

Suction grille

300
250 500
Max. 500
Handle
250 Max. 500
Handle
3.3.2 Multiple outdoor unit installation Front view Rear view
• Provide at least 25 mm of space between the outdoor units if multiple units are installed.
• When routing the piping from the side of an outdoor unit, provide space for the piping.
• No more than 3 units must be installed side by side. 3.5. Installing the unit
When 3 units or more are arranged in a line, provide the space as shown in the following
• Please install the outdoor unit without slant. (within 3 degrees )
example when an obstruction is present also in the upward area.
• Install 4 anchor bolts at the locations indicated with arrows in the figure.
When the upward area is open (Unit: mm) • To reduce vibration, do not install the unit directly on the ground. Install it on a secure
base (such as concrete blocks).
(1) Obstacles at rear only (2) Obstacles at front only • The foundation shall support the legs of the unit and have a width of 50 mm or more.
• Depending on the installation conditions, the outdoor unit may spread its vibration during
operation, which may cause noise and vibration. Therefore, attach damping materials
(such as damping pads) to the outdoor unit during installation.
• Install the foundation, making sure that there is enough space for installing the connec-
tion pipes.
• Secure the unit to a solid block using foundation bolts. (Use 4 sets of commercially avail-
able M10 bolts, nuts, and washers.)
1500 or more • The bolts should protrude 20 mm. (Refer to the figure.)
300
• If overturning prevention is required, purchase the necessary commercially available
(3) Obstacles at front and rear only items.
Unit: mm
166 650 154

Bolt
50 50
AIR Nut
16

500 Base
20

1500 or more
410

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

• Obstacles at rear and above only

Do not install directly on the ground, this may result in equipment failure.
Provide ample space for ice buildup from condensate between the bottom of the unit and
the flat surface on which it is mounted.
Otherwise, there is risk that the drainage water will freeze between the device and the
surface, disabling drainage.
1500
CAUTION
If the unit is installed in a region that is exposed
to high winds, freezing conditions, freezing rain,
1500 snow fall or heavy snow accumulation, take
appropriate measures to protect it from those ele-
500 ments.
Max. 300 To ensure stable operation, the outdoor unit must
be installed on a raised stand or rack, at or above
the anticipated snow depth for the region.
The installation of snow hoods and drift preven-
tion fencing is recommended when blowing and
drifting snow is common to the region.
Base

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 Table. B (Diameter of piping used between outdoor unit and first separation
4. SYSTEM CONFIGURATION tubes or headers)
Diameter of piping [mm (in.)]
4.1. System configuration Outdoor
Between outdoor unit Between outdoor unit
unit cool-
MODEL and the farthest indoor and the farthest indoor
CAUTION ing capac-
unit < 90m *3 unit ≥ 90m *3
ity [kW]
Always keep to the limit on the total amount of refrigerant. Exceeding the limit on the Liquid pipe Gas pipe Liquid pipe Gas pipe
total amount of refrigerant when charging will lead to malfunction.
AJ*040LELAH 12.1 9.52 (3/8) 15.88 (5/8) 9.52 (3/8) 19.05 (3/4)
• Between outdoor unit and the farthest indoor unit
a + f ≤ 120 m, a + p ≤ 120 m AJ*045LELAH 14.0 9.52 (3/8) 15.88 (5/8) 9.52 (3/8) 19.05 (3/4)
• Between the first separation tube and the farthest indoor unit AJ*054LELAH 15.5 9.52 (3/8) 19.05 (3/4) 9.52 (3/8) 19.05 (3/4)
f ≤ 40 m, p ≤ 40 m
• Between the nearest indoor unit and the outdoor unit *3: Pipe Length: “a + f” or “a + p” of “4.1. System configuration”
a + b + h ≥ 5 m, a+c+q ≥ 5 m
• Between outdoor unit and the first separation tube Table. C (Diameter of piping used between separation tubes)
a≥3m Total cooling Outside diameter [mm(in.)]
• Difference in height between outdoor units and indoor units (H1*) Separation
capacity of indoor Header *4
50 m or less: Outdoor unit is higher than indoor unit Liquid pipe Gas pipe tube *4
unit [kW]
40 m or less: Outdoor unit is lower than indoor unit
• Difference in height between indoor units and indoor units 4.4 to 11.1 9.52 (3/8) 15.88 (5/8) UTR-H0906L
H2 ≤ 15 m, H3 ≤ 15 m UTP-AX054A
11.2 to 20.1 9.52 (3/8) 19.05 (3/4) UTR-H0908L
• Maximum total equivalent pipe length
a + f + h + j + l + n + p + q + s + u ≤ 180 m *4: For the installation method, please refer to the installation manuals for indoor unit,
• Total refrigerant amount ≤ 15.7 kg separation tubes or headers.
Fig. A If pipe diameter Table C > Table B , select pipe size from Table B.
“Total cooling capacity of indoor unit” is the total value for the cooling capacity of indoor
Outdoor unit connected downstream.
unit
Use a standard separation tube for pipe branching. Do not use a T tube as it does not
separate the refrigerant evenly.
a
f Table. D (Diameter of piping used between separation tube and indoor unit)
Model code of Outside diameter [mm(in.)]
indoor unit Liquid pipe Gas pipe
b h j l n
Indoor Indoor Indoor Indoor Indoor 07 to 14 6.35 (1/4) 12.70 (1/2)
c
unit unit unit unit unit H1* 18 to 30 9.52 (3/8) 15.88 (5/8)
p 36 to 54 *5 9.52 (3/8) 19.05 (3/4)
*5: If pipe diameter Table D > Table C , using of pipe size from Table C is preferable.
q s u H2 (Use reducer to change the diameter of connection pipe.)
Indoor Indoor Indoor
unit unit unit Table. E (Indoor unit capacity comparison table - The indication of power is
H3 Indoor different depending on the model.)
unit
Model code of
04 07 09 12 14 18 24 30 36 45 54
indoor unit
4.2. Pipe selection Capacity [kW] 1.1 2.2 2.8 3.6 4.5 5.6 7.1 9.0 11.2 12.5 14.0
In the case of ARXB07LALH: equivalent to model code of indoor unit
CAUTION Model code 07 → Capacity=2.2kW
This unit is designed specifically for use with the R410A refrigerant.
4.3. Protection of pipes
Pipes for R407C or R22 may not be used with this unit.
Do not use existing pipes. Location Working period Protection method
Improper pipe selection will degrade performance. 1 month or more Pinch pipes
Outdoor
Less than 1 month Pinch or tape pipes
Indoor — Pinch or tape pipes
• Protect the pipes to prevent the entry of moisture and dust.
Pipe size • Especially pay attention when passing the pipes through a hole or connecting the end of
(table B) a pipe to the outdoor unit.
First separation Separation tube
tube (optional) (optional)
Pipe size
(table C)
Pipe size
(table D)
Indoor Indoor Indoor Indoor Indoor Indoor
unit unit unit unit unit unit

Table. A (Wall thickness and pipe material for each diameter)

mm 6.35 9.52 12.70 15.88 19.05
Outside Diameter
(in) (1/4) (3/8) (1/2) (5/8) (3/4)
mm 0.8 0.8 0.8 1.0 1.2
Wall Thickness*2
(in) (0.032) (0.032) (0.032) (0.039) (0.047)
Material COPPER*1 JIS H3300 C1220T-O or equivalent
Please select the pipe size in accordance with local rules.
*1: Allowable tensile stress ≥ 33 N/mm
*2: Endurance pressure of the pipes 4.2 MPa

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 0.5 m or more Separation tube
5. PIPE INSTALLATION
To indoor
unit
5.1. Brazing
or
CAUTION Header
0.5 m or more
If air or another type of refrigerant enters the Pressure regulating valve
refrigeration cycle, the internal pressure in Cap
the refrigeration cycle will become abnormally
high and prevent the unit from exerting its full
performance. To indoor unit

Nitrogen gas
Apply nitrogen gas while brazing the pipes. 5.3. Opening the knockout hole
Nitrogen gas pressure: 0.02 MPa (= pressure
felt sufficiently on the back of your hand) Brazing area
CAUTION
If a pipe is brazed without applying nitrogen gas, it will create an oxidation film.
Be careful not to deform or scratch the panel while opening the knockout holes.
This can degrade performance or damage the parts in the unit (such as the compressor
or valves). To protect the piping insulation after opening a knockout hole, remove any burrs from
the edge of the hole. It is recommended to apply rust prevention paint to the edge of the
Do not use flux to braze pipes. If the flux is the chlorine type, it will cause the pipes to
hole.
corrode.
In addition, if the flux contains fluoride, it will affect the refrigerant piping system due to • Pipes can be connected from 4 directions, front, lateral side, rear side and bottom.
deterioration of refrigerant oil. (Fig. A)
• When connecting at the bottom, remove the service panel and piping cover on the front
For brazing material, use phosphor copper that does not require flux.
of the outdoor unit, and open the knockout hole provided at the bottom corner of the
piping outlet.
5.2. Indoor unit pipe connections • It can be installed as shown on “Fig. B” cutting out the 2 slits as indicated on “Fig. C”.
(When cutting slits, use a steel saw.)
CAUTION Fig. A
For details, refer to the Installation Instruction Sheet of each part.

Separation tube
Horizontal Vertical
B A B
A:
Outdoor unit or Refrigerant
branch kit Service
or
A panel
B: Horizontal line
Indoor unit or Refrigerant
branch kit ± 15°
B A
GOOD GOOD

Fig. B Fig. C
PROHIBITED

Header
Gas pipe Horizontal line Horizontal line
C β1
H1 = 0 to 10 mm
(α1: 0° to 1°)
Outdoor
GOOD α1 View C β1: -10° to 10°
Slit
unit side H1 Slit
Liquid pipe Horizontal line Vertical line Bottom
D connection
H2 = 0 to 10 mm
Outdoor α2 (α2: 0° to 1°)
unit side H2 β2 β2: -10° to 10°
GOOD
View D

PROHIBITED

Front connection Lateral connection Bottom connection Rear connection

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.

0.5 m or more Separation tube

Main pipe
To indoor
unit

To indoor unit or
Header
0.5 m or more
Main pipe

To indoor unit
To indoor unit

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 5.4. Pipe connection CAUTION
Hold the torque wrench at its grip, keeping it in a right angle with the pipe, in order to
CAUTION tighten the flare nut correctly.
Do not use mineral oil on a flared part. Prevent mineral oil from getting into the system Outer panel may be distorted if Blank cap Flare nut
as this would reduce the lifetime of the units. fastened only with a wrench. Be
sure to fix the elementary part with a Torque wrench
While brazing the pipes, be sure to blow dry nitrogen gas through them. holding wrench (spanner) and fasten
The maximum lengths of this product are shown in the table. If the units are further apart with a torque wrench (refer to below 90°
than this, correct operation cannot be guaranteed. diagram). Do not apply force to the
blank cap of the valve or hang a
5.4.1 Flaring wrench, etc., on the cap. If blank cap Holding
is broken, it may cause leakage of wrench
Use special pipe cutter and flare tool exclusive for R410A. Torque
refrigerant.
(1) Cut the connection pipe to the necessary length with a pipe cutter. wrench
(2) Hold the pipe downward so that the cuttings will not enter the pipe and remove any
Flare nut [mm (in)] Tightening torque [N·m (kgf·cm)]
burrs.
(3) Insert the flare nut (always use the flare nut attached to the indoor and outdoor units 6.35 (1/4) dia. 16 to 18 (160 to 180)
respectively) onto the pipe and perform the flare processing with a flare tool. Leakage 9.52 (3/8) dia. 32 to 42 (320 to 420)
of refrigerant may result if other flare nuts are used. 12.70 (1/2) dia. 49 to 61 (490 to 610)
(4) Protect the pipes by pinching them or with tape to prevent dust, dirt, or water from 15.88 (5/8) dia. 63 to 75 (630 to 750)
entering the pipes. 19.05 (3/4) dia. 90 to 110 (900 to 1100)
Check if [L] is flared uniformly
and is not cracked or scratched. B In the case of AJ*054LELAH Example: Case of front connection
It is necessary to change a connection Connection pipe (Gas)
pipe diameter by using Reducer. (Pipe outside dia.:
Die
(1) Reducer must be brazed in the 19.05 mm (3/4 in)
A
outside of the outdoor unit.
L Pipe (2) Distance between 3-way valve and Brazing
reducer ≤ 1 m 1 m or less
(3) The part of Reducer do insulation
Dimension A [mm] processing after brazing.
Pipe outside diameter 0
Dimension B-0.4
[mm (in)] Flare tool for R410A, [mm]
clutch type Reducer Connection pipe (Gas)
(accessory) (Pipe outside dia.:
6.35 (1/4) 9.1 15.88 mm (5/8 in))
9.52 (3/8) 13.2 5.4.4 Handling precautions for the valves
12.70 (1/2) 0 to 0.5 16.6 • Mounted part of Blank cap is sealed for protection.
15.88 (5/8) 19.7 • Fasten blank cap tightly after opening valves.
19.05 (3/4) 24.0 Operating the valves
When using conventional (R22) flare tools to flare R410A pipes, the dimension A should • Use a hexagon wrench (size 4 mm).
be approximately 0.5 mm more than indicated in the table (for flaring with R410A flare Opening:
tools) to achieve the specified flaring. Use a thickness gauge to measure the dimension A. (1) Insert the hexagon wrench into the Opening
It is recommended that a R410A flaring tool is used. valve shaft, and turn it counterclock- Opening direction
Hexagon wrench
Pipe outside diameter Width across flats of wise. direction
Width across Seal
[mm (in)] Flare nut [mm] (2) Stop turning when the valve shaft can
flats (blank cap
no longer be turned. (Open position)
6.35 (1/4) 17 installation
Closing: portion)
9.52 (3/8) 22
(1) Insert the hexagon wrench into the
12.70 (1/2) 26 Liquid
valve shaft, and turn it clockwise. Gas pipe
pipe
15.88 (5/8) 29 (2) Stop turning when the valve shaft can
no longer be turned. (Closed position)
19.05 (3/4) 36

5.4.2 Bending pipes

CAUTION
To prevent breaking of the pipe, avoid sharp bends. Bend the pipe with a radius of
curvature of 100 mm or more.
If the pipe is bent repeatedly at the same place, it will break.
• If pipes are shaped by hand, be careful not to collapse them.
• Do not bend the pipes at an angle of more than 90°.
• When pipes are repeatedly bent or stretched, the material will harden, making it difficult
to bend or stretch them any more.
• Do not bend or stretch the pipes more than 3 times.
5.4.3 Pipe connection

CAUTION
Be sure to install the pipe against the port on the indoor unit and the outdoor unit cor-
rectly. If the centering is improper, the flare nut cannot be tightened smoothly.
If the flare nut is forced to turn, the threads will be damaged.
Do not remove the flare nut from the outdoor unit pipe until immediately before connect-
ing the connection pipe.
After installing the piping, make sure that the connection pipes do not touch the com-
pressor or outer panel. If the pipes touch the compressor or outer panel, they will vibrate
and produce noise.
(1) Detach the caps and plugs from the 3-way valve (Liquid)
3-way valve
pipes. (Gas)
(2) Center the pipe against the port on the
outdoor unit, and then turn the flare nut
by hand. Flare nut Flare nut
(3) Tighten the flare nut of the connection
pipe at the outdoor unit valve connec-
tor. Connection
(4) After tightening the flare nut by hand, Connection pipe pipe (Gas)
use a torque wrench to fully tighten it. (Liquid)

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 6. ELECTRICAL WIRING 6.2. Knockout hole

6.1. The precautions of electrical wiring CAUTION

Be careful not to deform or scratch the panel while opening the knockout holes.
WARNING After opening the knockout holes, remove burr on the edges, and attach the one-touch
Wiring connections must be performed by a qualified person in accordance with specifi- bush (accessory), grommet or conduit etc. to prevent damaging the cables.
cations. It is recommended to apply rust proof paint on the edges to prevent rust.
The rated supply of this product is 50 Hz, 400 V of 3-phase, 4-wire. Use a voltage within Knockout holes are provided for wiring.
the range of 342 to 456 V.
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 fire.
Select a breaker (Included with earth leakage circuit breaker) of appropriate capacity
and install one at every power supply of an outdoor unit. Wrong selection of breakers or Service
transition wiring will lead to electric shock and fire. panel
Do not connect AC power supply to the transmission line terminal board.
Improper wiring can damage the entire system.
Install a breaker (Included with earth leakage circuit breaker) in accordance with the
related laws and regulations.
Connect the connector cord securely to the terminal.
Faulty installation can cause a fire. Knockout holes are provided 2 each in the same size in front, lateral and rear sides.
Installation method of One-touch bush
Make sure to secure the insulation portion of the connector cable with the cord clamp. A
Please fix the One-touch bush (accessory) as shown in the figure below.
damaged insulation can cause a short circuit.
Front connection Lateral connection Rear connection
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.
Do not modify power cable, use extension cable or branch wiring. Improper use may
cause electric shock or fire by poor connection, insufficient insulation or over current.
Use ring terminals and tighten the terminal screws to the specified torques, otherwise,
abnormal overheating may be produced and possibly cause serious damage inside the (Pipe cover front) (Pipe cover rear)
unit.
Securely install the electrical box cover on the unit. An improperly installed service panel
can cause serious accidents such as electric shock or fire through exposure to dust or
water.
If the supply cable is damaged, it must be replaced by the manufacturer, its service One-touch bush
agent or similarly qualified persons in order to avoid a hazard. (Accessories)

6.3. Selecting power supply cable and breaker

CAUTION
The primary power supply capacity is for the air conditioner itself, and does not include CAUTION
the concurrent use of other devices.
Regulation of cable size and circuit breaker differs from each locality, please refer in
Connect the power cables in positive phase sequence. If there is a missing phase con- accordance with local rules.
nection, the unit will not operate normally.
Refer to the table for the wiring and breaker specifications of each installation condition.
Do not use crossover power supply wiring for the outdoor unit.
Breaker (Time delay fuse or circuit capacity)
If the electrical power is inadequate, contact your electric power company. MODEL
Fuse capacity (A) Leakage current
Install a breaker (Included with earth leakage circuit breaker) in a location that is not
exposed to high temperatures. AJ*040LELAH 16
If the temperature surrounding the breaker is too high, the amperage at which the 30 mA
AJ*045LELAH 16
breaker cuts out may decrease. 0.1 sec or less
AJ*054LELAH 16
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 earth Outdoor unit power supply cable
leakage circuit breaker is necessary to prevent a malfunction of the breaker itself.
MODEL Recommended cable size (mm²) Limited wiring
When the electrical switchboard is installed outdoors, place it under lock and key so that length (m)
Power cable Earth cable
it is not easily accessible.
AJ*040LELAH 2.5 2.5 32
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 AJ*045LELAH 2.5 2.5 32
cause miss operation or breakdown.
AJ*054LELAH 2.5 2.5 32
Always keep to the maximum length of the transmission cable. Exceeding the maximum
1) These values are recommended data.
length may lead to erroneous operation.
2) Specification: Use conformed cord with Type 60245 IEC66
The static electricity that is charged to the human body can damage the control PC 3) Max. cable length: Set a length so that the voltage drop is less than 2%. Increase the
board when handling the control PC board for address setting, etc. cable diameter when the cable length is long.
Please keep caution to the following points. In case of connected outdoor unit
Provide the grounding of Indoor unit, Outdoor unit and Option equipment.
Transmission cable 230 V 1ø 50 Hz
Cut off the power supply (breaker).
Touch the metal section (such as the unpainted control box section) of the indoor or Indoor unit
outdoor unit for more than 10 seconds. Discharge the static electricity in your body. Power supply
Never touch the component terminal or pattern on the PC board. cable
400 V 3ø 50 Hz
Breaker

Breaker
Outdoor unit Remote con-
Power supply cable troller cable

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 6.4. Transmission line 6.4.3 Enabling/Disabling automatic address setting
You can enable/disable automatic address setting for the indoor unit and the signal ampli-
fier.
CAUTION To enable automatic address setting for the indoor unit, connect the indoor unit to outdoor
Caution when wiring cable: units under the same refrigerant system.
When stripping off the coating of lead wire, always use the exclusive tool such as a
Example: Disable Automatic Address setting
wire stripper. If there is no exclusive tool available necessarily, carefully strip the coat-
ing by a cutter etc. so that the conductive wire is not damaged. Transmission line
Refrigerant
If it is damaged, it may lead to an open circuit and a communication error. system 1
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. Transmission line
Refrigerant
• Do not shorted at edge at root. system 2

GOOD PROHIBITED
1 wire 2 pcs at one side Wires twisted
Transmission line
Refrigerant
system 3

Example: Enable Automatic Address setting

2 wires Shorted at edge Shorted at root Transmission line
Refrigerant
system 1

Transmission line
Refrigerant
6.4.1 Transmission wiring specifications system 2
Follow the specifications below for the transmission cable.
Use Size Cable type Remarks
Transmission line
22AWG LEVEL 4 (NEMA)
LONWORKS ®
Transmission cable 0.33mm² non-polar 2core, twisted pair Refrigerant
compatible cable system 3
solid core diameter 0.65mm
Twisted pair with shielded type.
Use the shielded wire specified and always ground it both end. 6.5. Wiring method
6.4.2 Wiring rules 6.5.1 Connection diagrams
(1) Total length of transmission cable
Total transmission line length: MAX 3,600 m Power supply: 400V 3Φ 50Hz
Breaker:
EF + EG + GH + HJ + HK + KL < 3,600 m (Fig.2) L1 L2 L3 N (1) Earth leakage circuit breaker
In the following cases , Signal Amplifier is required. (2) Current breaker (over current)
1 When the total length of the transmission line exceeded 500 m.
AB + BC + BD > 500 m (Fig.1) Breaker
2 When the total number of units* is over 64.
3 Transmission line length between each unit* ≥ 400 m Outdoor
(2) Length of transmission cable between 1 network segment (NS) unit L1 L2 L3 N
To other refrigerant circuit outdoor unit
EF + EG + GH + HJ + HK ≤ 500 m (Fig.2) Power supply
KL ≤ 400 m (Fig.2)
Transmission
Unit* means indoor unit, outdoor unit, Touch Panel Controller and System Controller,
Signal Amplifier, single split adaptor, Network Convertor etc.
Fig. 1
Outdoor unit
Transmission line
System
B C Controller
A
Terminal Indoor unit Indoor unit Indoor unit
resistor D
Transmission Transmission Transmission
Indoor unit Power supply Remote control Power supply Remote control Power supply Remote control
Touch
Panel
When AB+BC+BD> 500 m Controller
:Signal Amplifier is required.
Fig. 2 *1 *1 *1
*2 *2
NS 1 NOTE: *2
Outdoor unit Do not use loop wiring. Breaker Breaker Breaker
Indoor unit This may lead to parts
F damage and erroneous
E operation. Power supply Remote Power supply Remote Power supply Remote
230V 1Φ 50Hz controller 230V 1Φ 50Hz controller 230V 1Φ 50Hz controller

Terminal resistor *1: The number of power supply terminals is different depending on the indoor unit model.
For the wiring, refer to the indoor unit installation manual.
*2: Earth (Ground) the remote controller if it has an earth (ground) cable.
G Transmission line • 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
H J Touch remote controller, Y3 is not used.)
Panel The wiring example for outdoor and indoor units is shown in figure.
K Controller
NS 2
Signal Amplifier
L System
Controller

Terminal resistor

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 6.5.2 Wiring procedure 6.6. External input and external output
• Remove the service panel. And connect the cable to the terminal in accordance with the
terminal name plate.
• Use a ring terminal to connect the electric cables to the power supply terminal board.
6.6.1 Terminal position
• Keep the earth cable longer than the other cables. Outdoor unit PC board Base heater
• After connecting the electric cable, secure them with a cable clamp. (CN115: Black)
• Connect the cable without applying excessive tension.
• Use the specified cable type and connect the cable securely.
Secure with a cable M3 screw 0.5 to 0.6 N·m (5 to 6 kgf·cm)
clamp as shown in the Tightening
figure below. torque M5 screw 2.0 to 3.0 N·m (20 to 30 kgf·cm)

Transmission terminal (M3)

Power supply terminal

Input 4
(CN134: Red)
Cable tie Input 5
(CN135:
About 550 mm

(accessory) Input 3
About 520 mm

Orange) (CN133: White)

Cable Output 1
Input 2
clamp (CN136:
(CN132: Green)
Black)
Ring terminal (M5)
Output 2 Input 1
(CN131: Yellow)
8 to 10 mm

(CN137:
45 to 50 mm

Blue)
40 mm

30 mm
25 to

25 to

CAUTION
Earth (ground) Do not bundle the cable for base heater with other cables.
Cable tie Cable tie
cable
(accessory)
Power supply
cable Transmission cable Power supply cable
When connecting cable to Input 2
Transmission cable
How to connect wiring to the terminal
Caution when wiring cable
(1) Use ring terminals with insulating sleeves as shown in the figure to connect to the
terminal block.
(2) Securely clamp the ring terminals to the cables using an appropriate tool so that the
cables do not come loose.
About 550 mm

(3) Use the specified 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 screw-
driver that is too small, otherwise, the screw heads may be damaged and prevent Cable (for external
the screws from being properly tightened. input and output)
(5) Do not tighten the terminal screws too much, otherwise, the screws may break.
(6) See the table below for the terminal screw tightening torques.

Ring terminal Cable tie (tightened with transmission cable)

Strip 10 mm

Cable (for external input and output)

* If the outdoor unit is not installed in the wall, cover the
Sleeve exposed part of cable with a 1 mm thick or more insula-
tion tubing.
Screw with 6.6.2 External input terminal
special washer Screw with
Cable special washer Setting to low noise mode, cooling priority/heating priority selection, outdoor unit operation
Ring terminal peak control setting, emergency/batch stop and electricity meter pulse are possible from
the outside.
Ring terminal
Wiring method and specifications
Terminal block * A twisted pair cable (22 AWG (0.33 mm²)) should be used. Maximum length of cable is
150 m.
Cable
* Use an external input and output cable with appropriate external dimension, depending
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.
Shielding the transmission cable Input2
Input1 Input3 Input4 Input5
Connect both ends of the shielded wire of the transmission cable to the earth (ground) CN131 CN132 CN133 CN134 CN135
terminal of the equipment or to the earth (ground) screw near the terminal. (Yellow) (Green) (White) (Red) (Orange)
Be sure to use one side of a twisted-pair cable when using transmission cable with 2 sets
of twisted-pair cables.
P.C.B
Wind with insulation tape to prevent short circuit

connected unit connected unit connected unit connected unit connected unit
Use one side of the Connect both ends of shielded wire to earth (Ground).
twisted-pair cable

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 Operation behavior
7. FIELD SETTING
Each input terminal works as follows.
Connector Input signal Status
CAUTION
Input1 OFF Normal operation
Discharge the static electricity from your body before setting up the DIP switches.
CN131 (Yellow) ON Low noise mode operation Never touch the terminals or the patterns on the parts that are mounted on the PC
OFF Cooling priority board.
Input2
CN132 (Green) *1 ON Heating priority

Input3 OFF Normal operation 7.1. Field setting switches

CN133 (White) ON Outdoor unit operation peak control 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.
Input4 OFF Normal operation PC board switches for various settings and LED displays are shown in the figure.
CN134 (Red) ON Batch stop or Emergency stop operation *2, *3
No pulse No information from electricity meter 7.2. DIP switch setting
Input5
CN135 (Orange) *4 Pulse Power usage information from electricity meter
7.2.1 List of Settings
The operations of each input terminal and the selection of function are set with the push SET 5 must be set for the DIP DIP Switch Function
button on the PC board of outdoor unit. About the setting, please refer to “7.4. Push button switch. SET 1 1-4 Forbidden
setting”. Configure the settings before turn-
SET 2 1-4 Forbidden
ing on the power. Settings for SET
NOTE: 1, SET 2, SET 3 and SET 4 DIP SET 3 1-4 Forbidden
*1: The “external input priority mode” must be set by pressing push button on PC board switches are factory default ones. Do SET 4 1-4 Forbidden
of outdoor unit. (Refer to “7. FIELD SETTING”.) not change them. 1-3 Forbidden
SET 5
*2: Batch stop or Emergency stop pattern can be selected by outdoor unit PC board 4 Terminal resistor setting
push button. (Refer to “7. FIELD SETTING”.)
*3: The emergency stop function mounted in the J-II does not guarantee the regulations LED lamp
of each country. For this reason, sufficient checking is necessary regarding use. 7 Segment display
Especially, since the fact that the equipment may not be emergency-stopped in the
Rotary switch
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.
*4: Pulse input to CN135 must be width 50 ms or more, and must be interval 50 ms or
more.

6.6.3 External output terminal

You can detect the operation condition of outdoor unit and the abnormal situation of both DIP switch
indoor and outdoor unit.
Outdoor unit printed circuit board Push button DIP switch
Wiring method and specifications Output
Connector Status
Error status voltage 7.2.2 Terminating resistor setting
This output indicates the outdoor unit Output1 0V Normal
and connected indoor unit's “Normal” or CN136 CAUTION
DC 12-24 V Error
“Error” status. (Black) *5 Be sure to set the terminal resistor according to specifications.
Operation status Output2 0V Stop Set the terminal resistor for every network segment (NS).
This output indicates the outdoor unit's CN137 DC 12-24 V Operation If terminal resistor is set in multiple devices, the overall communication system may be
“Operation” status. (Blue) *5 damaged.
If terminal resistor is not set in a device, abnormal communication may occur.
DC power supply *5
P.C.B • Be sure to set 1 terminal resistor in a network segment. You can set the terminal resistor
(External) 12-24 V
at the outdoor unit or signal amplifier.
• When setting the terminal resistor of a signal amplifier, refer to the installation manual of
CN136 (Black) or the signal amplifier.
CN137 (Blue) • When setting multiple terminal resistors, take note of the following items.
Connected load (Operation Indica- 1 How many network segments are there in a VRF system?
*7 tor or Error Indicator) 2 Where will you set the terminal resistors in a network segment? (Condition for 1 seg-
*6
ment: Total number of outdoor and indoor units and signal amplifiers is less than 64, or
Connected unit
the total length of the transmission cable is less than 500 m)
*5: Provide a DC 12 to 24 V power supply. 3 How many outdoor units are connected to 1 refrigerant system?
Select a power supply capacity with an ample surplus for the connected load.
Configure the setting (DIP switch SET 5) SET 5 Terminal
*6: The allowable current is 30 mA or less. of the terminal resistor of the outdoor units Remarks
4 resistor
Provide a load resistance such that the current becomes 30 mA or less. as shown below from conditions 1 to 3.
*7: Polarity is [+] for pin 1 and [-] for pin 2. Connect correctly.
OFF Disable —
Do not impress a voltage exceeding 24 V across pins 1-2. ON Enable (Factory setting)

* A twisted pair cable (0.33 mm² (22AWG)) should be used. Figure: Terminal resistor setting
Maximum length of cable is 150 m. NS1 (Network segment 1)
About the setting of
* Use an external input and output cable with appropriate external dimension, depending (Set terminal resistor at outdoor units)
terminal resistor
on the number of cables to be installed.
Terminal resistor: on Outdoor unit
6.6.4 Base heater terminal
: On
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. Master unit Refrigerant system 1
: Off
P.C.B.
Terminal resistor: off Signal amplifier
Install
Voltage: Refrigerant system 2
CN115 power supply input voltage Base heater *9 Master unit Do not
(Black) install
*8
cable
(0.82 mm2 (18AWG))

*8: Connect to pin 1 and pin 3. No connection pin 2 and pin 4. Refrigerant system 3
*9: The allowable current is 1 A or less. Master unit
NS2 (Network NS3 (Network segment 3) NS4 (Network
segment 2) segment 4)
Terminal resistor: on

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 7.3. Rotary switch setting (Forbidden) 2 4 0 0 
24
(Factory default)
The rotary switch (REF AD) sets the refrigerant circuit address of the outdoor unit. Config-
ure the settings only on the master unit of a refrigerant system.
(Forbidden) 2 5 0 0 
25
If multiple refrigerant systems are connected, set the rotary switch (REF AD) as shown in (Factory default)
the table below. (Forbidden) 2 6 0 0 
26
Rotary (Factory default)

Refrigerant
Switch Setting (Forbidden) 2 7 0 0 
Setting Type of switch 27
Setting range (Factory default)
circuit
address REF AD (Forbidden) 2 8 0 0 
28
×10 ×1 (Factory default)

0 0 0 Refrigerant Setting
(Forbidden) 2 9 0 0 
29
circuit 0–99 example (Factory default)
1 0 1
2 0 2
address 63 Level 1 (stop) 0 0 
Level 2
• • • REF AD × 10 REF AD × 1 0 1
(operated at 40% capacity)
• • • Level 3
Rotary Switch (REF AD × 1): Factory setting “0” Energy saving 0 2
98 9 8 (operated at 60% capacity) 3 0
level setting *1
Rotary Switch (REF AD × 10): Factory setting “0” Level 4
99 9 9 30 0 3
(operated at 80% capacity)
Level 5
7.4. Push button setting (operated at 100% capacity)
0 4

The capacity limit can be selected by the external input terminal (CN133) when operating
Various functions can be set. Set when necessary.
with the “Energy Saving Peak Cut function”.
Perform settings after all indoor units have stopped operation. The lower the level, the more the effect of energy saving, but the cooling/heating perfor-
Table. A: List of Settings mance will also drop.
7 segment display Factory
(Forbidden) 3 1 0 0 
No Setting Item 31
First 2 digits Last 2 digits default (Factory default)

Standard (40 to 65 m) 0 0  (Forbidden) 3 4 0 0 

34
(Factory default)
Pipe length setting Short (less than 40 m) 0 1
0 0
00 *1 Medium (65 to 90 m) 0 2 (Forbidden) 3 5 0 0 
35
Long 1 (90 to 120 m) 0 3 (Factory default)
Pipe length means the length between master outdoor unit and the nearest indoor unit. (Forbidden) 3 6 0 0 
36
10
(Forbidden) 1 0 0 0  (Factory default)
(Factory default) (Forbidden) 3 7 0 0 
37
Normal mode 0 0  (Factory default)
Save energy mode 0 1
Cooling capacity Capacity prior- Off (quiet priority) 0 0 
High power mode 1 1 1 0 2 ity setting (in low 4 0
11 shift *1 On (capacity priority) 0 1
High power mode 2 0 3 noise mode) *1
40
(Forbidden) 0 4 If the cooling/heating performance becomes insufficient when the low noise mode is set, it is pos-
sible to set “capacity priority” that automatically cancels the low noise mode (once performance is
Set this item when necessary.
restored, the mode will automatically return to the low noise mode).
Normal mode 0 0  Low noise mode Off (Normal) 0 0 
Heating capacity Save energy mode 0 1 4 1
1 2 41 setting *1 On (Low noise mode) 0 1
12 shift *1 High power mode 1 0 2
High power mode 2 0 3
42
(Forbidden) 4 2 0 0 
Set this item when necessary.
(Factory default)
(Forbidden) 1 3 0 0 
13
(Factory default) 60
(Forbidden) 6 0 0 0 
(Factory default)
(Forbidden) 1 4 0 0 
14
(Factory default) 61
(Forbidden) 6 1 0 0 
(Factory default)
Switching between Batch stop 0 0 
batch stop or 2 0 62
(Forbidden) 6 2 0 0 
emergency stop *1 Emergency stop 0 1 (Factory default)
This mode selects the pattern of the stop function to be operated by the external input Setting number (x00) 0 0 
terminal (CN134).
20 • Batch stop: The stop of all indoor units connected to same refrigerant system due to Setting number (x01) 0 1
Electricity meter
input signal coming from CN134. ······ 7 0 ··· ···
• Emergency stop: When emergency stop is actuated, the indoor unit does not accept the 70 No. setting 1 *2
operation command from the remote controller. On the other hand, when the emer- Setting number (x98) 9 8
gency stop is released (no input from CN134), the air conditioner does not return to the Setting number (x99) 9 9
original operation until the indoor unit is turned on by the remote controller.
Set the ones digit and tens digit of the No. of the electricity meter connected to CN135.
Priority given to the first command 0 0 
Operation mode
Setting number (0xx) 0 0 
Priority given to external input Electricity meter
0 1 Setting number (1xx) 7 1 0 1
selecting method of outdoor unit 2 1 71 No. setting 2 *2
*1 Priority given to administrative Setting number (2xx) 0 2
0 2
indoor unit Set the hundreds digit of the No. of the electricity meter connected to CN135.
21
Select the priority setting of the operation mode. Setting number (xx00) 0 0 
• Priority given to the first command: Priority is given to the operation mode which is set first.
• Priority given to external input of outdoor unit: Priority is given to the operation mode Setting number (xx01) 0 1
Electricity meter
which is set by the external input terminal (CN132). ······ 7 2 ··· ···
• Priority given to administrative indoor unit: Priority is given to the operation mode of the pulse setting 1 *3
72 Setting number (xx98) 9 8
administrative indoor unit which is set by the wired remote controller.
(Forbidden) 2 2 0 0  Setting number (xx99) 9 9
22 Set the ones digit and tens digit of the No. of the electricity meter pulse setting connected
(Factory default)
to CN135.
(Forbidden) 2 3 0 0 
23
(Factory default)

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 Setting number (00xx) 0 0 
2: Setting the first
Setting number (01xx) 0 1
Electricity meter 2 digits
······ 7 3 ··· ···
pulse setting 2 *3 3: Setting the last 2 digits
73 Setting number (98xx) 9 8
Continue to press the “SELECT” button until the
Setting number (99xx) 9 9
desired number appears at the last 2 digits.
Set the hundreds digit and thousands digit of the electricity meter pulse setting connected
to CN135.
(Forbidden) 9 0 0 0 
90
(Factory default)
*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.
• When system is normal • When system is abnormal
POWER/MODE lamp lights up. (ERROR Check the settings as there is an error in Every press of the
lamp is off.) the settings for outdoor unit address “SELECT” button will
(DIP switch SET 3-1, 2) or number of change the setting
POWER/MODE POWER
ERROR ERROR number for the first 2
connected slave units (DIP switch SET
MODE

lamp: ON lamp: OFF

LED101
(GREEN)
LED102
(RED)
3-3, 4). digits.
7 segment LED105 LED104 POWER
ERROR

display: POWER/MODE MODE

ERROR lamp:
turn off lamp: ON LED101
(GREEN)
LED102
(RED) Blinking
MODE
/EXIT SELECT ENTER
ENTER LED105 LED104

MODE/EXIT SW107 SW108 SW109

button 7 segment
button display: “-”
SELECT button display MODE
/EXIT SELECT ENTER

SW107 SW108 SW109

(2) Setting method

Use the “MODE/EXIT”, “SELECT”, and “ENTER” buttons to configure settings according
to the procedures below. Setting is complete when the lamp lights up
(If no setting is made, the factory default setting will be displayed.) Press “ENTER” button to return to “2: Setting the
: Press the “MODE/EXIT” button first 2 digits” (If there is no operation for 5 seconds
after the setting, the display will return to “2: Setting
: Press the “SELECT” button the first 2 digits”.)
: Press the “ENTER” button.

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

1: Function setting

First 2 digits Last 2 digits

7 segment LED display (Continue to press the “SELECT”
(LED 105, LED 104) button until the desired number
appears at the last 2 digits.)

(Flashing)

(When [F3] to [F9] are displayed, continue to press the

“SELECT” button until [F2] is displayed.)
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 display will return to “2: Setting
the first 2 digits”.)

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

7.5. Address setting for signal amplifiers

7.5.1 Address setting for signal amplifiers
When using signal amplifiers, the address for signal amplifiers must be set.
The address for signal amplifiers can be set automatically from 1 outdoor unit (master
unit) on the network.
Refer to “Fig. Wiring example for automatic address setting” (7.6.1 chapter) for the wiring
example.
(For manual setting of address, refer to the signal amplifier installation manual.)

7.5.2 Automatic address setting for signal amplifiers

When setting the address of the signal amplifier, please use the factory setting. (See the
installation manual of the signal amplifier)
• When the system is normal, nothing will be displayed on the 7 segment display.
• When ERROR is displayed, inspect the units.
Use the “MODE/EXIT”, “SELECT”, and “ENTER” buttons on the outdoor unit PC board to
configure settings according to the procedures below.

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 1: Function setting
7.6.2 Procedures to enable automatic address setting on indoor
units
First 2 digits Last 2 digits
Check that the rotary switch IU AD on the indoor unit PC board is set to “00”.If it is not set
(the display when the main power is
to “00”, it means the address of that device is not set. (Factory default is “00”).
turned on)
Turn on the power of the indoor and outdoor units.
• When the system is normal, nothing will be displayed on the 7 segment display.
• When ERROR is displayed, inspect the units.
Use the “MODE/EXIT”, “SELECT”, and “ENTER” buttons on the outdoor unit PC board to
configure settings according to the procedures below.

1: Function setting

First 2 digits Last 2 digits

(The display when the main

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

Automatic address setting for

signal amplifiers

Press the “SELECT” button until “10” is

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

Press the “ENTER” button for more than 3

seconds.
Automatic address setting for indoor units

Setting is complete when the number of units

is displayed Press the SELECT button until
“11” is displayed.

Press the “ENTER” button for

more than 3 seconds.

End
The number of indoor units with normal settings
7.6. Indoor unit address setting will be displayed at the first 2 digits of the 7 seg-
ment LED display. The number of indoor units with
7.6.1 Indoor unit address setting error will be displayed at the last 2 digits.
Address must be set for the indoor unit.
Manual setting → • When setting with the switch inside the indoor unit, refer to
the indoor unit operating manual. NOTE:
After the “ENTER” button is pressed, the end
• When setting with a remote control, refer to the remote
processing will occur for about 30 seconds. During
control operating manual.
this period, the 7 segment will blink.
Automatic setting → • Check that the wiring is as shown in the figure below.
Operate using the outdoor master unit of each refrigerant End
system.
Fig. Wiring example for automatic address setting 7.7. Resistance measurement of transmission cable
(1) Signal amplifier wiring example (Measure with breaker OFF)
(2)(3)(4) Indoor unit wiring example
(Connect the indoor and outdoor units of the same refrigerant system as shown Distance from termination resis-
below.) CAUTION tor (m)
Refrigerant system1 Signal amplifier Do not turn on the power if the resistance 0 ~ 200 ~ 300 ~400 ~500
between the terminals of the transmission ~100
cable is abnormal. Otherwise, the PC A short circuit somewhere or 2
Master unit 0~
board may be damaged. or more termination resistors are
50
Refrigerant system2 connected
Measure the resistance between 2 terminals
of a transmission cable. 50
(1) Transmission cable connecting in- 60
Master unit door units, outdoor units, and signal 70
Signal amplifier amplifiers 80
Refrigerant system3 Measure the resistance of the signal
90
amplifier terminal and the terminal of
100
the indoor and outdoor units connected
Master unit 110
farthest away from the device where
terminal resistor is measured. 120
A value from the table is displayed, 130
Approximate resistance (Ω)

NOTE: 140
depending on the distance from the
• When network is connected to other refrigerant systems, the automatic address function
cannot be used. signal amplifier and the device where 150
• The addresses of indoor units that have been configured automatically cannot be as- the terminal resistor is set. 160
signed in the order when they are installed. (Refer to the indoor unit installation manual This value is an estimate. 170
for the procedures to check the addresses.) (2) Transmission cable connecting 180
outdoor units in a refrigerant system
190 Faulty contact or wiring
The resistance between the terminals ~ length over 500 m
of the transmission cable is 45-60 Ω.
1K Faulty contact, open circuit, or no
This value is an estimate.
~∞ termination resistor

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 Evacuation procedure
8. PIPE INSTALLATION II (1) Remove the blank caps of the gas pipe and liquid pipe and check that the valves are
closed.
Fig. A Connection system Fig. B (2) Remove the charging port cap.
Pressure regu- Service hose (3) Connect a vacuum pump and a pressure gauge to a charging hose and connect it to
Pressure with valve core the charging port.
lating valve
Outdoor unit gauge (4) Activate the vacuum pump and vacuum the indoor unit and connection piping until the
Charging Charging pressure gauge becomes -100.7 kPa (-755mm Hg).
port port cap Evacuate from both the gas pipe and the liquid pipe.
(5) Continue evacuating the system for 1 hour after the pressure gauge reads -100.7 kPa
Nitrogen Blank cap (-755mm Hg).
3-way (6) Remove the charging hose and reinstall the charging port cap.
valve
8.3. Additional charging
Connecting
pipe
CAUTION
Indoor Indoor Vacuum Scale Hexagon wrench Do not turn on the power unless all operations are complete.
unit unit pump 4 mm (5/32")
After evacuating the system, add refrigerant.
Table. A
Do not charge the system with a refrigerant other than R410A.
Pipe 3-way valve Blank cap Charging port cap
Always keep to the limit on the total amount of refrigerant. Exceeding the limit on the
7.0 to 9.0 N·m 20.0 to 25.0 N·m 12.5 to 16.0 N·m total amount of refrigerant will lead to malfunction during charging of refrigerant.
Liquid valve
(70 to 90 kgf·cm) (200 to 250 kgf·cm) (125 to 160 kgf·cm)
Do not reuse recovered refrigerant.
11.0 to 13.0 N·m 30.0 to 35.0 N·m 12.5 to 16.0 N·m
Gas valve Use an electronic scale to measure the charging amount of refrigerant.
(110 to 130 kgf·cm) (300 to 350 kgf·cm) (125 to 160 kgf·cm)
Adding more refrigerant than the specified amount will cause a malfunction.

8.1. Sealing test 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 refrig-
CAUTION erant cylinder is equipped with a siphon, it is not necessary to place the cylinder upright.
Use only nitrogen gas. Check if the steel cylinder has a siphon installed or not before filling. (There is an indica-
Never use refrigerant gas, oxygen, in flammable gas or poisonous gas to pressurize the tion “with siphon for filling liquid” on the steel cylinder.)
system. (If oxygen is used, there is the danger of an explosion.)
Filling method R410A Set the cylinder vertical and fill with
Do not apply shock during sealing test. for cylinder with the liquid.
It can rupture the pipes and cause serious injury.
Gas
siphon (Liquid can be filled without turning
Do not turn on the power unless all operations are complete. bottom up with the siphon inside.)
Liquid
Do not block the walls and the ceiling until the sealing test and the charging of the refrig-
erant gas have been completed. Filling method R410A Turn bottom up and fill with liquid.
for other cylin- Gas (Be careful to avoid turning over
After connecting the pipes, perform an sealing test. ders the cylinder.)
Recheck that the 3-way valve are closed before performing a sealing test.
(Fig. B) Liquid
Pour nitrogen gas through both the liquid pipe and the gas pipe.
Pressurize nitrogen gas to 4.2 MPa to perform the sealing test. Be sure to use the special tools for R410A for pressure resistance and to avoid mixing of
impure substances.
Check all flare connection areas and brazed areas.
If the units are further apart than the maximum pipe length, correct operation can not be
Then, check that the pressure has not decreased.
Compare the pressures after pressurizing and letting it stand for 24 hours, and check that guaranteed.
the pressure has not decreased. Make sure to back closing valve after refrigerant charging. Otherwise, the compressor
* When the outdoor temperature changes 5 °C, the test pressure changes 0.05 MPa. may fail.
If the pressure has dropped, the pipe joints may be leaking.
Minimize refrigerant release to the air. Excessive release is prohibited under the Freon
If a leakage is found, immediately repair it and perform a sealing test again. Collection and Destruction Law.
* Decrease the pressure of nitrogen gas before blazing
After completing the sealing test, release the nitrogen gas from both valves. 8.3.1 Procedure for charging the system with refrigerant
Release the nitrogen gas slowly.
(1) Remove the charging port cap from the liquid pipe.
(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
8.2. Vacuum process calculation formula indicated below.
(4) Remove the charging hose and install the charging port cap.
CAUTION (5) Remove the blank caps (gas pipe and liquid pipe) and open the valves.
(6) Close the blank caps.
Do not turn on the power unless all operations are complete. (7) After adding refrigerant, indicate the added charging volume on the unit.
If the system is not evacuated sufficiently, its performance will drop. * Tighten the blank caps and charging port caps to the torque values specified in the Table
Be sure to evacuate the refrigerant system using a vacuum pump. A. To open and close the valves, use an M4 hexagon wrench.
8.3.2 Checking total amount of refrigerant and calculating the
The refrigerant pressure may sometimes not rise when a closed valve is opened after
the system is evacuated using a vacuum pump. This is caused by the closure of the
amount of refrigerant charge to be added
refrigerant system of the outdoor unit by the electronic expansion valve. This will not • The amount of refrigerant charge to be added is the total value of the basic refrigerant
affect the operation of the unit. charge amount and the value calculated from the length of the liquid pipe.
• Round up the value to 2 decimal places.
Use a clean gauge manifold and charging hose that were designed specifically for use
with R410A. Using the same vacuum equipment for different refrigerants may damage “B”
the vacuum pump or the unit. Model Factory charged “a”
Diameter of liquid
amount (kg) Additional amount
Do not purge the air with refrigerants, but use a vacuum pump to evacuate the system. pipe (mm)
for pipe length (kg/m)
AJ*040LELAH 4.80
• If moisture might 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 AJ*045LELAH 5.30 Ø 6.35 0.021
inside of the pipes, if rain might enter the pipes during work, etc.) AJ*054LELAH 5.30 Ø 9.52 0.058
• After operating the vacuum pump for 2 hours, pressurize to 0.05 MPa (i.e., vacuum
breakdown) with nitrogen gas, then depressurize down to -100.7 kPa (-755 mmHg) for
an hour using the vacuum pump (vacuum process).
• If the pressure does not reach -100.7 kPa (-755 mmHg) 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.

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 (1) Calculation of additional amount for pipe length Check Item Check Column
Total length of ø 9.52 Total length of ø 6.35 1 Check that all work on the wiring connecting the outdoor
mm liquid pipe mm liquid pipe
a × 0.058 a × 0.021 unit and indoor units has been completed.
(kg/m) (kg/m)
A= + 2 Is a breaker installed at the power supply cable of outdoor
m m
unit and every indoor units?
3 Are the cables connected to the terminals without loose-
kg kg
ness, and in accordance with the specifications?
Total 4 Are all the indoor units stopped? Indoor unit connection
= (Round up A to 2 decimal place) check can not be performed if any unit is operating.
kg
5 Is the connection to Service tool (UTY-ASGX) and Web
(2) Calculation of total refrigerant amount monitoring tool (UTY-AMGX) stopped?

9.1.2 Operating procedure for Indoor unit connection check

C = A+B = (B : Factory charged amount)
kg Please perform the indoor unit connection check according to following procedures.
The Indoor unit connection check can be completed within several minutes.
NOTE:
Check the total refrigerant amount under the following conditions : Press the “MODE/EXIT” button
Turn on the power of indoor
Condition Computational formula unit and outdoor unit. : Press the “SELECT” button
Total amount of refrigerant C ≤ 15.7 kg : Press the “ENTER” button.
LED105 LED104 : Press the “ENTER” button for more
<Calculation> than 3 seconds.
Outdoor unit: AJ*054LELAH
(1) Calculation of additional amount for outdoor unit
If liquid pipe piping length is the following
Ø 9.52 mm: 50 m, Ø 6.35 mm: 35 m
Set to Function mode [F3].
Additional charge volume:
A = 50 m × 0.058 kg/m +35 m × 0.021 kg/m = 3.635 kg ≈ 3.64 kg
(2) Check the total amount of refrigerant
C = A + B = 3.64 kg + 5.30 kg = 8.94 kg ≤ 15.7 kg
→No problem if the above condition is satisfied.

(When [F4] to [F9] are displayed, continue to

8.4. Installing insulation press the “SELECT” button until [F3] is dis-
played.)
• 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. Press the “SELECT” button until “12” is displayed.
Table. Selection of insulation
(Use an insulation material with equal heat transmission rate or below 0.040 W/(m·k))
Insulation material minimum thickness (mm) Press the “ENTER” button for more than 3 sec-
onds.
Relative humidity ≤ 70% ≤ 75% ≤ 80% ≤ 85%
Pipe diameter 6.35 8 10 13 17 When indoor unit connection
(mm) check can not be performed
9.52 9 11 14 18
12.70 10 12 15 19 This will be displayed when the Indoor unit connection
15.88 10 12 16 20 check starts.

19.05) 10 13 16 21
* When an ambient temperature and relative humidity exceed 32 °C, please strengthen (*1)
Confirm the number of connected indoor units and the
heat insulation of refrigerant pipe.
volume ratio of the indoor units connection.

8.5. Filling with putty

(*1) The number of connected indoor units
Ex.) When 8 units are connected
WARNING (*2)
Fill the piping holes and wiring holes with putty (supplied locally) to avoid any gap (Fig A). (*2) Volume ratio of the indoor units con-
If small animals such as insects enter the external unit, a short circuit may be caused nection
near electrical components in the service panel. Ex.) When the ratio is 120%
If the outdoor unit is installed at a level that Fig. A Exit indoor unit connection check mode.
is higher than the indoor unit, the water that
has condensed in the 3-way valve of the When error occurs
outdoor unit could travel to the indoor unit. Insulation
Therefore, use putty in the space between
the pipe and the insulation to prevent the Putty
entry of water to the indoor units.
Please refer to the following “Error displays”
for details.

9. TEST RUN

9.1. Indoor unit connection check

Normal operation will not be possible without performing the Indoor unit connection check. When it finishes normally, nothing will be displayed on
7 segment display.
9.1.1 Things to confirm before starting the Indoor unit connection
check
To ensure safety, check that the following work, inspections and operations have been
completed.

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 9.1.3 Error displays Test operation setting method
Use the “MODE/EXIT”, “SELECT”, and “ENTER” buttons on the indoor unit PC board to
• When error occurs, “Err” and “Number of errors occurred” are alternately displayed on
configure settings according to the procedures below.
the 7 segment display every 1 second.
• For the content of error, please refer to the “10.2. Error codes”. Function settings
• When error codes are displayed, all the error codes can be confirmed by pressing the
“SELECT” button. First 2 digits Last 2 digits

Example:
When “Indoor unit capacity error [E221]” and “Indoor unit duplicate address error [E261]”
occurred.

(*1) When the address of the overlap indoor

unit is displayed, press and hold the “EN-
TER” button for more than 3 seconds.
(*1)
(*2) (When [F4] to [F9] are displayed, continue to
press the SELECT button until [F3] is displayed.)

[Ad + address number]

(*2) When errors other than the address of Settings for starting test run
the overlap indoor unit exist, press “SE- operation
LECT” button to switch to the next error. For heating operation, press the “SE-
LECT” button until “01” is displayed.
If error occurs, it will display “-”.

9.2. Test run

Before the test operation, check the following items. Press the “ENTER” button for Press the “ENTER” button for
(1) Is there a gas leakage? (At pipe connections {flange connections and brazed areas}) more than 3 seconds. more than 3 seconds.
(2) Is the system charged with the specified volume of refrigerant? This will be dis- This will be dis-
(3) Is the refrigerant circuit address correct? played when the played when the
(4) Is a breaker installed at the power supply cable of outdoor unit? cooling test opera- heating test opera-
(5) Are the cable connected to the terminals without looseness, and in accordance with tion is complete. tion is complete.
the specifications?
(6) Are the initial settings of the switches of the outdoor unit correctly configured? This will be This will be
(7) Is the 3-way valve of the outdoor unit open? (Gas pipe and liquid pipe) displayed after 5 displayed after 5
(8) Is power supplied to the crank case heater for more than 12 hours? Electricity current seconds. seconds.
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? Op-
erating indoor units which are not connected to the power may result in malfunctions.
(10) Is Indoor unit connection check performed? Test run doesn't operate if Indoor unit Settings for stopping test run
connection check is not performed. operation
After checking that the above items are all in order, refer to “9.3.
Test run method” to test operation the unit.
If there are problems, adjust immediately and recheck.

9.3. Test run method Press the “ENTER” button for Press the “ENTER” button for
more than 3 seconds. more than 3 seconds.
Be sure to configure test run settings only when the outdoor unit has stopped oper- This will be dis- This will be dis-
ating. played when the played when the
cooling operation heating operation
• Depending on the communication status between the indoor and outdoor units, it may
mode is canceled. mode is canceled.
take several minutes for the system to start operating after settings for the test run are
complete. This will be This will be
• After the test run settings are complete, the outdoor unit and the connected indoor displayed after 5 displayed after 5
units will start operating. Room temperature control will not activate during test opera- seconds. seconds.
tion (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 sufficient length of
time before restarting the operation.
Perform test operation for each refrigerant system. EXIT
You can set “cooling test operation" or “heating test operation” with the push button on the
outdoor unit PC board. After the test operation is complete, turn off the power. Attach the cover of the electrical
component 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 are not
configured correctly.
• The system will not operate normally with an incorrect DIP switch setting.
Stop the system immediately and recheck the DIP switch setting.

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 E 9 3. 1 Outdoor unit inverter compressor start up error
9.4. Checklist
E 9 4. 1 Outdoor unit trip detection
Outdoor unit compressor motor loss of synchroniza-
Check description Check method Criteria E 9 5. 5
tion
Cooling: low pressure ap- E 9 7. 1 Outdoor unit fan motor 1 lock error
High and low pressure values Check it with a pres- prox. 0.8 MPa E 9 7. 4 Outdoor unit fan motor 1 undervoltage error
1 Outdoor unit
are normal. sure gauge. Heating: high pressure
Outdoor unit fan motor 1 temperature error
approx. 3.0 MPa actuator error E 9 7. 5
(protective action)
Drain water is discharged E 9 8. 1 Outdoor unit fan motor 2 lock error
Check it by pouring
2 smoothly through the drain ― Outdoor unit fan motor 2 temperature error
water. E 9 8. 5
hose. (protective action)
Indoor and outdoor unit fans E 9 A. 1 Outdoor unit coil 1 (expansion valve 1) error
3 Check them visually. ―
are operating. E 9 A. 2 Outdoor unit coil 2 (expansion valve 2) error
Compressor operates after the Check the operating Outdoor unit discharge temperature 1 error (perma-
4 ― E A 1. 1
indoor unit operates. sound. nent stop)
E A 3. 1 Outdoor unit compressor 1 temperature error
Difference between inlet and Measure the inlet and Temperature difference Refrigerant
5 E A 4. 1 Outdoor unit high pressure error
outlet temperatures is normal. outlet temperatures. 10 degrees system error
E A 4. 2 Outdoor unit high pressure protective action 1
Check the 7 segment Error blinking or no error E A 5. 1 Outdoor unit low pressure error
6 Error is not displayed.
display. code display E A C. 4 Outdoor unit heat sink temperature error

7 segment LED indicator:

10. LED STATUS A: , C: , E: , F: , H: , J: , L: S: , P: , U: ,, d: , n: , o: , r: t: ,

1: , 2: , 3: , 4: , 5: , 6: , 7: , 8: , 9: , 0:
You can determine the operating status by the lighting up and blinking of the LED display.
Check the status using the table below.

10.1. Normal operation codes 11. INFORMATION

Mode CODE DESCRIPTION Main contents of label
C L Cooling
Item Detail
H t Heating
1. Model name Model name
o r During oil recovery operation
Operation 2. Serial number Serial number
d F During defrosting operation
P C During power saving operation 3. Electric characteristics Phase, rated voltage, and frequency
L n During low noise operation 4. Weight Product weight
Cooling/heating capacity under cooling/heating
5. Capacity
10.2. Error codes condition (refer to item 15)
Electric current during cooling/heating operation
6. Current
Mode CODE DESCRIPTION
under cooling/heating condition (refer to item 15)

Communica- E 1 4. 2 Outdoor unit network communication 2 error Input during cooling/heating operation under cool-
7. Input power
tion error E 1 4. 5 The number of indoor unit shortage ing/heating condition (refer to item 15)
E 2 2. 1 Indoor unit capacity error Maximum electric current (temperature condition is
8. Max. Current
E 2 4. 2 Connection unit number error (Indoor unit) max. cooling condition [refer to item 16])
Function setting
E 2 6. 1 Indoor unit duplicate address error
error 9. Air circulation Air circulation
E 2 8. 1 Auto address setting error
E 2 8. 4 Signal amplifier auto address error 10. Noise level Noise level
Indoor unit 11. Refrigerant Refrigerant type and initial charging amount
E 5 U. 1 Indoor unit miscellaneous error
actuator error
Means pressure of High Pressure side/Low Pres-
E 6 1. 5 Outdoor unit reverse/missing phase & wiring error 12. Max. pressure (HP/LP)
sure side
E 6 2. 3 Outdoor unit EEPROM access error
E 6 2. 6 Outdoor unit inverters communication error 13. Protection Protection level against dust and water
E 6 2. 8 Outdoor unit EEPROM data corruption error 14. Working temperature Working temperature
Outdoor unit
E 6 3. 1 Outdoor unit inverter error
PCB/Electrical Dry-bulb temperature and wet-bulb temperature
Outdoor unit inverter PCB power short interruption 15. Condition of cooling/heating
component/ E 6 7. 2 under standard cooling/heating condition
error
Switch error
Outdoor unit rush current limiting resister temp. rise Dry-bulb temperature and wet-bulb temperature at
E 6 8. 2 16. Condition of max. cooling
error (protective operation) maximum electric current and input
Outdoor unit transmission PCB parallel communica- 17. Manufacture year Manufacture year
E 6 9. 1
tion error
18. Origin Origin country
E 7 1. 1 Outdoor unit discharge temp. thermistor 1 error
E 7 2. 1 Outdoor unit compressor temp. thermistor 1 error Manufacturer
E 7 3. 3 Outdoor unit heat ex. liquid temp. thermistor error FUJITSU GENERAL LIMITED
19. Manufacturer
E 7 4. 1 Outside air temp. thermistor error Address: 3-3-17, Suenaga, Takatsu-ku, Kawasaki
E 7 5. 1 Outdoor unit suction gas temp. thermistor error 213-8502, Japan
E 7 7. 1 Outdoor unit heat sink temp. thermistor error
Outdoor unit sub-cool heat ex. gas inlet temp. therm-
E 8 2. 1
Outdoor unit istor error
sensor error Outdoor unit sub-cool heat ex. gas outlet temp.
E 8 2. 2
thermistor error
E 8 3. 2 Outdoor unit liquid pipe temp. thermistor 2 error
Outdoor unit current sensor 1 error
E 8 4. 1
(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

En-18

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