Fujitsu ADUH24LUAS1 Installation Manual

AIR CONDITIONER
Duct Type

Contents

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

1.1. IMPORTANT! Please read before starting .................................. 1

1.2. SPECIAL PRECAUTION ............................................................ 1

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

2.1. Precaution for using R410A refrigerant ...................................... 2

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

2.3. Accessories ................................................................................ 3

2.4. Pipe requirement ........................................................................ 3

2.5. Electrical requirement ................................................................. 3

2.6. Optional parts ............................................................................. 4

3. INSTALLATION WORK ..................................................................... 4

3.1. Selecting an installation location ................................................ 4

3.2. Installation dimensions ............................................................... 4

3.3A. Installing the unit (Ceiling concealed type) ............................... 5

Installing the unit (Wall mounted type/ Floor standing concealed type)

3.3B.

3.4. Drain installation ......................................................................... 8

3.5. Pipe installation ........................................................................ 10

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

3.7. Remote controller setting .......................................................... 12

4. OPTIONAL INSTALLATION WORK ................................................12

4.1. Optional kit installation .............................................................. 12

4.2. External input and output .......................................................... 12

4.3. Remote sensor (Optional parts) ............................................... 13

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

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

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

4.7. Optional parts cable binding ..................................................... 14

5. REMOTE CONTROL INSTALLATION ............................................. 14

5.1. Group control ............................................................................ 14

5.2. Multiple remote control ............................................................. 15

5.3. DIP switch 101 setting .............................................................. 15

6. FUNCTION SETTING...................................................................... 15

6.1. Function details ........................................................................ 15

7. CHECK LIST .................................................................................... 18

8. TEST RUN ....................................................................................... 18

8.1. Check items .............................................................................. 18

8.2. Operation method ..................................................................... 18

9. FINISHING ...................................................................................... 18

10. CUSTOMER GUIDANCE ................................................................ 18

11. ERROR CODES .............................................................................. 18

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

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

• Installation must be performed in accordance with the requirement of NEC (National
Electrical Code) and CEC (Canadian Electrical Code) by authorized personnel only.

• All products are manufactured to metric units and tolerances. United States customary
units are provided for reference only. In cases where exact dimensions and tolerances
are required, always refer to metric units.

.... 7

INSTALLATION MANUAL

For authorized service personnel only.

PART No. 9374342587

1. SAFETY PRECAUTIONS

1.1. IMPORTANT! Please read before starting

This air conditioning system meets strict safety and operating standards.
As the installer or service person, it is an important part of your job to install or service the
system so it operates safely and efficiently.

For safe installation and trouble-free operation, you must:

• Carefully read this instruction booklet before beginning.

• Follow each installation or repair step exactly as shown.

• Observe all local, state, and national electrical codes.

• Pay close attention to all danger, warning, and caution notices given in this manual.

WARNING:

CAUTION:

• Hazard alerting symbols

If Necessary, Get Help

These instructions are all you need for most installation sites and maintenance conditions.
If you require help for a special problem, contact our sales/service outlet or your certified
dealer for additional instructions.

In Case of Improper Installation

The manufacturer shall in no way be responsible for improper installation or maintenance
service, including failure to follow the instructions in this document.

1.2. SPECIAL PRECAUTION

When Wiring

ELECTRICAL SHOCK CAN CAUSE SEVERE PERSONAL INJURY OR DEATH. ONLY A
QUALIFIED, EXPERIENCED ELECTRICIAN SHOULD ATTEMPT TO WIRE THIS SYSTEM.

• Do not supply power to the unit until all wiring and tubing are completed or reconnected
and checked.

• Highly dangerous electrical voltages are used in this system. Carefully refer to the wir­ing diagram and these instructions when wiring. Improper connections and inadequate
grounding (earthing) can cause accidental injury or death.

• Ground (Earth) the unit following local electrical codes.

• Connect all wiring tightly. Loose wiring may cause overheating at connection points and
a possible fire hazard.

When Transporting

Be careful when picking up and moving the indoor and outdoor units. Get a partner to
help, and bend your knees when lifting to reduce strain on your back. Sharp edges or thin
aluminum fins on the air conditioner can cut your fingers.

When Installing...

...In a Ceiling or Wall

Make sure the ceiling/wall is strong enough to hold the unit’s weight. It may be necessary
to construct a strong wood or metal frame to provide added support.

...In a Room

Properly insulate any tubing run inside a room to prevent “sweating” that can cause
dripping and water damage to walls and floors.

...In an Area with High Winds

Securely anchor the outdoor unit down with bolts and a metal frame.
Provide a suitable air baffle.

...In a Snowy Area (for Heat Pump-type Systems)

Install the outdoor unit on a raised platform that is higher than drifting snow.

When Connecting Refrigerant Tubing

• Keep all tubing runs as short as possible.

• Use the flare method for connecting tubing.

• Apply refrigerant lubricant to the matching surfaces of the flare and union tubes before
connecting them, then tighten the nut with a torque wrench for a leak-free connection.

• Check carefully for leaks before opening the refrigerant valves.

This symbol refers to a hazard or unsafe practice which can result in
severe personal injury or death.

This symbol refers to a hazard or unsafe practice which can result in
personal injury and the potential for product or property damage.

: Electrical : Safety/alert

English

Español Français

En-1

When Servicing

• Turn the power OFF at the main circuit breaker panel before opening the unit to check or
repair electrical parts and wiring.

• Keep your fingers and clothing away from any moving parts.

• Clean up the site after you finish, remembering to check that no metal scraps or bits of
wiring have been left inside the unit being serviced.

• After installation, explain correct operation to the customer, using the operating manual.

WARNING

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

• Be sure to read this manual thoroughly before installation.

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

• Hand this Manual, together with the operating manual, to the customer. Request the
customer to keep them on hand for future use, such as for relocating or repairing the unit.

WARNING

• Installation of this product must be done by experienced service technicians or profes-

sional installers only in accordance with this manual. Installation by nonprofessional or
improper installation of the product may cause serious accidents such as injury, water
leakage, electric shock, or fire. If the product is installed in disregard of the instructions
in this manual, it will void the manufacturer’s warranty.

• Do not turn on the power until all work has been completed. Turning on the power be-

f

ore the work is completed can cause serious accidents such as electric shock or fire.

• If refrigerant leaks when you are working, ventilate the area. If the leaking refrigerant is

exposed to a direct flame it may produce a toxic gas.

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

• Do

lines.

Excess pressure can cause a rupture.

• In

stallation must be performed in accordance with regulations, codes, or standards for

elect

rical wiring and equipment in each country, region, or the installation place.

This appliance is not intended for use by persons (including children) with reduced

•

physical, sensory or mental capabilities, or lack of experience and knowledge, unless
they have been given supervision or instruction concerning use of the appliance by a
person responsible for their safety. Children should be supervised to ensure that they
do not play with the appliance.

• Cancer and Reproductive Harm - www.P65Warnings.ca.gov.

CAUTION

•

Read carefully all safety information written in this manual before you install or use the
air conditioner.

•

Install the product by following local codes and regulations in force at the place of
installation, and the instructions provided by the manufacturer.

•

This product is part of a set constituting an air conditioner. The product must not be
installed alone or be installed with non-authorized device by the manufacturer.

•

Always use a separate power supply line protected by a circuit breaker operating on all
wires with a distance between contact of 1/8 in (3 mm) for this product.

•

To protect the persons, ground (earth) the product correctly, and use the power cable
combined with an Earth Leakage Circuit Breaker (ELCB).

•

This product is not explosion proof, and therefore should not be installed in explosive
atmosphere.

•

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

•

This product contains no user-serviceable parts. Always consult experienced service
technicians for repairing.

•

When moving or relocating the air conditioner, consult experienced service technicians
for disconnection and reinstallation of the product.

•

Do not place any other electrical products or household belongings under the product.
Condensation dripping from the product might get them wet, and may cause damage
or malfunction to the property.

2. PRODUCT SPECIFICATION

2.1. Precaution for using R410A refrigerant

• The basic installation work procedures are the same as conventional refrigerant
(R22) models.

However, pay careful attention to the following points:

• Since the working pressure is 1.6 times higher than that of conventional refriger­ant (R22) models, some of the piping and installation and service tools are special.
(Refer to the following table.)

Especially, when replacing a conventional refrigerant (R22) model with a new refriger-

ant R410A model, always replace the conventional piping and flare nuts with the
R410A piping and flare nuts.

• Models that use refrigerant R410A have a different charging port thread diameter to
prevent erroneous charging with conventional refrigerant (R22) and for safety. There­fore, check beforehand. [The charging port thread diameter for R410A is 1/2-20 UNF.]

• Be more careful that foreign matter (oil, water, etc.) does not enter the piping than
with refrigerant (R22) models. Also, when storing the piping, securely seal the open­ing by pinching, taping, etc.

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

2.2. Special tools for R410A

Tool name Contents of change

Pressure is high and cannot be measured with a R22

Gauge manifold

Charge hose

Vacuum pump

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

Copper pipes

It is necessary to use seamless copper pipes and it is desirable that the amount of residual
oil is less than 0.004 oz/100 ft (40 mg/10 m). Do not use copper pipes having a collapsed,
deformed or discolored portion (especially on the interior surface). Otherwise, the expansion
value or capillary tube may become blocked with contaminants.
As an air conditioner using R410A incurs pressure higher than when using R22, it is neces­sary to choose adequate materials.

• Do not use the existing (for R22) piping and flare nuts.

If the existing materials are used, the pressure inside the refrigerant cycle will rise and

cause failure, injury, etc. (Use the special R410A materials.)

• Use (refill or replace with) specified refrigerant (R410A) only. Use of unspecified refriger-

ant can cause product malfunction, burst, or injury.

• Do not mix any gas or impurities except specified refrigerant (R410A). Inflow of air or

application of unspecified material makes the internal pressure of the refrigerant cycle
too high, and may cause product malfunction, burst of piping, or injury.

gauge. To prevent erroneous mixing of other refrigerants,
the diameter of each port has been changed.
It is recommended to use gauge with seals -30 inHg to 768
psi (-0.1 to 5.3 MPa) for high pressure.

-30 inHg to 551 psi (-0.1 to 3.8 MPa) for low pressure.

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

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

WARNING

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2.3. Accessories

2.4. Pipe requirement

WARNING

For installation purposes, be sure to use the parts supplied by the manufacturer or other
prescribed parts.
The use of non-prescribed parts can cause serious accidents such as the unit to fall,
water leakage, electric shock, or fire.

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

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

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

Name and Shape

Operation manual

Installation manual
(This manual)

Installation template

Washer

Drain hose

(Ø 3/4 in [I.D.], Ø 1-1/16 in [O.D.])

Hose band

Drain hose insulation B

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

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

Qty

1

1

1

8

1

1

1

Name and Shape

Cable tie (large)

Cable tie (medium)

Filter (large)
[18 model]

Filter (small)
[09,12 model]

Coupler heat insulation
(large)

Coupler heat
insulation(small)

Additional materials

Saddle

Qty

4

3

2

2

1

1

CAUTION

• Do not use existing pipes from another refrigeration system or refrigerant.

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

• It is necessary to use seamless copper pipes.
Material : Phosphor deoxidized seamless copper pipes
It is desirable that the amount of residual oil is less than 0.004 oz/100 ft (40 mg/10 m).

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

• Improper pipe selection will degrade performance. As an air conditioner using R410A
incurs pressure higher than when using conventional (R22) refrigerant, it is necessary
to choose adequate materials.

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

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

Thicknesses of Annealed Copper Pipes (R410A)

Pipe outside diameter [in (mm)] Thickness [in (mm)]

1/4 (6.35) 0.032 (0.80)

3/8 (9.52) 0.032 (0.80)
1/2 (12.70) 0.032 (0.80)
5/8 (15.88) 0.039 (1.00)
3/4 (19.05) 0.047 (1.20)

CAUTION

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

Model

09,12 1/4 (6.35) 3/8 (9.52)

18 1/4 (6.35) 1/2 (12.70)

• Use pipe with water-resistant heat insulation.

Diameter [in (mm)]

Liquid Gas

CAUTION

• Wrap heat insulation around both gas pipe and liquid pipe.
No heat-insulation work or incorrect heat-insulation work may cause water leaks.

• In a reverse cycle model, use heat insulation with heat resistance above 248 °F
(120 °C).

• If expected humidity of the installation location of refrigerant pipes is higher than
70 %, wrap the heat insulation around the refrigerant pipes.
If the expected humidity is between 70 % and 80 %, use heat insulation that has
a thickness of 9/16 in (15 mm) or more.
If the expected humidity is higher than 80 %, use heat insulation that has a
thickness of 13/16 in (20 mm) or more.

• The use of thinner heat insulation than specified above, may cause a condensation

on the surface of the insulation.

• Use heat insulation with thermal conductivity of 0.045 W/(m·K) or less (at 68 °F

(20 °C)).

2.5. Electrical requirement

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

WARNING

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

Cable

Connection cable

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

2% or more.

Conductor size

(AWG)

AWG 14

Remarks

3 cable + Ground (Earth),

230 V

1 Ø

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2.6. Optional parts

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

Parts name Model No. Application

For air conditioner operation

Wired remote controller UTY-RNRUZ

Simple remote controller

IR receiver unit UTY-LBTUM For the wireless remote controller
Remote sensor unit UTY-XSZX Room temperature sensor

Auto louver grille kit

External input and output
PCB / Box

External connect kit UTY-XWZXZG For external output port
W-LAN interface UTY-TFSXZ2 For wireless LAN interface
Modbus converter ―
KNX convertor ―

UTY-RSRY
UTY-RHRY

UTD-GXTA-W

UTD-GXTB-W

UTY-XCSX
UTZ-GXEA



(2-wired type)
For air conditioner operation

(2-wired type)

Air outlet grille with auto louver
(09, 12 model)

Air outlet grille with auto louver
(18 model)

For external input and output

Refer to Design & Technical manual.

3. INSTALLATION WORK

WARNING

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

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

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

3.1. Selecting an installation location

Especially, the installation place is very important for the split type air conditioner because it
is very difficult to move from place to place after the first installation.

WARNING

• Select installation locations that can properly support the weight of the indoor unit
and which will not amplify sound or vibration. If the installation location is not strong
enough, the indoor unit may fall and cause injuries.

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

• Decide the mounting position with the customer as follows:

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

the indoor unit.

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

over the room.

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

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

unit.

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

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

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

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

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

where the filter can be removed.

3.2. Installation dimensions

3.2.1. Ceiling concealed type

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

Strong and durable ceiling

Left
side

6 in (150 mm)
or more 1

• When intaking air from back

1 (20) or more

Indoor unit

16 in (400 mm)
or more

12 (300) or more

Right
side

[Unit: in (mm)]

CAUTION

• Do not install the unit in the following areas:

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

- Area filled with mineral oil or containing a large amount of splashed oil or steam,
such as a kitchen. It will deteriorate plastic parts, causing the parts to fail or the
unit to leak water.

- Area where is close to heat sources.

- Area that generates substances that adversely affect the equipment, such as
sulfuric gas, chlorine gas, acid, or alkali. It will cause the copper pipes and brazed
joints to corrode, which can cause refrigerant leakage.

- Area that can cause combustible gas to leak, contains suspended carbon fibers or
flammable dust, or volatile in flammables such as paint thinner or gasoline.

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

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

• Do not use the unit for special purposes, such as storing food, raising animals, grow­ing plants, or preserving precision devices or art objects. It can degrade the quality
of the preserved or stored objects.

• Install the unit where drainage does not cause any trouble.

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

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

• Install the indoor unit, outdoor unit, power supply cable, transmission cable, and
remote control cable at least 40 in (1 m) away from a television or radio receivers.
The purpose of this is to prevent TV reception interference or radio noise.
(Even if they are installed more than 40 in (1 m) apart, you could still receive noise
under some signal conditions.)

• Install the unit where ambient temperature does not reach 140 °F (60 °C) or more.
Take a measure such as ventilation for an environment in which heat is retained.

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

• Install the indoor unit on the place where the height from the floor is more than 71
in (1.8 m).

• Use the “Insulation kit for high humidity” (option), when the condition under the roof
is over 80% in humidity and over 86 °F (30 °C) in temperature. Otherwise, there is a
risk of condensation on the ceiling.

1 (20) or more

10 (240) or more

Service access

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

Ceiling

99 (2500) or more

Floor

[Unit: in (mm)]

Service access

(When no ceiling)

Unit

Control
box

12 (300) or

4 (100) or

more

more

*: Above

12 (300) or

more

4 in (100 mm)

Service space
When intaking air from bottom

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3.2.2. Wall mounted type/ Floor standing concealed type

The wall mounted type/floor standing concealed type requires a temperature correction
setting. Perform this in “6. Function setting”.

Left side

1 (10) or
less

1 (10) or
less

Right side
(PIPE side)

Grill

[Unit: in (mm)]

Model

09, 12 9

18 11

(The number of screws is different depending on

Screw

the model.)

Screw

Cover

6 (150)
or more

Left side

6 (150)
or more

4 (100) or
more

4 (100) or
more

Strong and

durable floor

Strong and

durable floor

12 (300) or
more

12 (300) or
more

Inlet air

Strong and

durable floor

1 (20) or
more

Right side
(PIPE side)

Grill

Inlet air

Strong and

durable floor

1 (20) or
more

1 (20) or
more

1 (20) or
more

6 (150)
or
more

Duct

6 (150)
or
more

3.3A. Installing the unit (Ceiling concealed type)

WARNING

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

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

3.3A.1. Unit installation example
nConnect the locally purchased duct:

(1) Inlet side

• Connect the duct to the locally purchased inlet flange.

• Connect the flange to the body with the locally purchased tapping screws.

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

Side inlet - Side outlet

Insulation material (Locally purchased)

Aluminum tape

Flange (Locally purchased)

Air

Duct
(Locally purchased)

Side inlet - Side outlet (Duct)

Insulation material (Locally purchased)

Aluminum tape

Flange (Locally purchased)

Air

Intake grille
(Locally
purchased)

Fan guard

Air

Flange (Locally purchased)

Aluminum tape

Tapping screw for
flange connection

(M4 x 10mm /

purchased)

Locally

CAUTION

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

(2) Outlet side

• Connect the duct with adjusting inside of outlet flange.

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

• Insulate the duct to avoid the dew condensation.

CAUTION

• Confirm the directions of the air intake and outlet before installing the unit.
The unit takes in air from the fan side, and expels it from the evaporator side.

• Check that duct work does not exceed the range of external static pressure of equip-

ment.

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

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

• Explain handling and washing methods of locally purchased materials to the cus-

tomer.

• To prevent people from touching the parts inside the unit, be sure to install grilles on

the inlet and outlet ports. The grilles must be designed in such a way that cannot be
removed without tools.

• When connecting the duct to the outlet port of the indoor unit, be sure to insulate the

outlet port and the installation screws to prevent water from leaking around the port.

• Set the static pressure of 09, 12 models to 0 to 30 Pa.

• Set the static pressure of 18 model to 0 to 50 Pa.

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

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

Duct
(Locally purchased)

Bottom inlet - Side outlet

Duct (Locally purchased)

Air

Intake grille (Locally purchased)

Intake grille

(Locally purchased)

Air

Air

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Outlet side

[Unit: in (mm)]

A

1 (25)

3.3A.3. Position the ceiling hole and hanging bolts

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

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

3/4

1

Inlet side

4-5/16

(109)

Model 09, 12 18

A 25-9/16 in (650 mm) 33-7/16 in (850 mm)

B P200×2= 15-3/4 in (400 mm) P200×3=23-5/8 in (600 mm)

B

P200

2-3/4 (70)

[Unit: in (mm)]

9/16 (15)

5-1/8 (130)

1-3/8

(35)

CAUTION

• Be sure to install the air inlet grille and the air outlet grille for air circulation. The cor-

rect temperature cannot be detected.

• Grills must be fixed so that man cannot touch indoor unit fan and exchanger, and

cannot be removed by only hand operation without tool.

• Be sure to install the air filter in the air inlet.
If the air filter is not installed, the heat exchanger may be clogged and its perfor-

mance may decrease.

3.3A.2. Install the filters

• Install the filters to the unit.

(19)

(198)

7-13/16

(25)

7/16 (11)

7/16 (11)

Installation template
(accessory)

Air

[Unit: in (mm)]

A

Model 09, 12 18

A 28-7/8 in (734mm) 36-3/4 in (934 mm)

3.3A.4. Fix the unit

(1) Hang the unit

Hanger

Hanger bolt

Nut A
(Locally purchased)

Washer
(Accessories)

Nut B
(Locally
purchased)

Drilling position
for bolts

(377)

14-13/16

09,12: 2 filters (Small)
18 : 2 filters (Big)

Unit

Filter

Filter (accessories)

Hanger bolt

Cover

Hanger

Unit

13/16 in
(20 mm)
or less

Nut A
(Locally purchased)

Washer
(Accessories)

Nut B
(Locally purchased)

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

length exceeds 20mm.

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(2) Leveling

Base horizontal direction leveling on top of the unit.

Ceiling

Level

GOOD PROHIBITED

Give a slight tilt to the side to which the drain hose is connected. The tilt should be in the
range of 0 to 3/8 in (0 to 10 mm).

3/8 in (10 mm) or less

Level

Air

CAUTION

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

• Make sure to insulate ducts to avoid condensation.

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

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

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

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

• Set the static pressure of 09, 12 models to 0 to 30 Pa.

• Set the static pressure of 18 model to 0 to 50 Pa.

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

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

Model

09, 12 9

18 11

3.3B.2. Install the filters

• Install the filters (Accessories) to the unit.

(The number of screws is different depending on

Screw

the model.)

GOOD

3/8 in (10 mm) or less

PROHIBITED

CAUTION

• Leave a space of 3-15/16 in (100 mm) or more between the inlet port and the ceiling.

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

3.3B. Installing the unit (Wall mounted type/ Floor standing concealed type)

WARNING

• Install the air conditioner in a location which can withstand a load do at least 5
times the weight of the main unit and which will not amplify sound or vibration. If the

installation location is not strong enough, the indoor unit may fall and cause injuries.

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

3.3B.1. Unit installation example
nConnect the locally purchased duct:

(1) Inlet side

• Connect the duct to the locally purchased inlet flange.

• Connect the flange to the body with the locally purchased tapping screws.

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

CAUTION

When the duct is connected to inlet side, remove filter provided with unit and attach
locally purchased filter at return air grille or in return duct.

(2) Outlet side

• Connect the duct to outlet flange.

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

• Insulate the duct to avoid condensation.

Filter

Unit

Filter

3.3B.2. Install the unit

• To prevent overturning, attach the unit to the floor or the wall.

• To avoid vibration of the unit, install vibration isolation pad between the unit and the
floor or the wall.

(1) Leveling

Level

En-7

GOOD

PROHIBITED

PROHIBITED

Air bleeding

Rise

3/8 in (10 mm) or less

Level

GOOD

3/8 in (10 mm) or less

CAUTION

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

3.4. Drain installation

3.4.1. Installing drain pipes

PROHIBITED

Trap

Observe the following procedures to construct centralized drain pipe fittings.

Ø 1-5/16 in [O.D.] or more

Downward gradient 1/100 or more

27 in (700 mm)
or less

nWhen drain pump is not used (natural drainage)

CAUTION

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

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

• Use general hard polyvinyl chloride pipe (Ø 3/4 in [I.D.]; Ø 1-1/16 in [O.D.]).

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

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

• Provide supporters when long pipes are installed.

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

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

WARNING

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

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

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

CAUTION

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

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

nWhen drain pump is used

• Use general hard polyvinyl chloride pipe (Ø 3/4 in [I.D.]; Ø 1-1/16 in [O.D.]).

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

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

• Provide supporters when long pipes are installed.

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

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

GOOD

Locally arranged pipe

Max.
11-13/16 in
(300 mm)

Gap of

60 to 78 in (1.5 to 2.0 m)

Ø 1-1/16 in [O.D.]
or more

27 in (700 mm)
or less

Horizontal or
upward gradient

Supporter

GOOD

4 in (100 mm)

or more

Drain hose (accessories)

Downward gradient

1/8 to 3/16 in

(2.5 to 5.0 mm)

Locally arranged pipe

Gap of 1.5 to 2 m

Supporter

Ø 1-1/16 in [O.D.]
or more

PROHIBITED

Air
bleeding

Trap

Rise

Drain hose is not used

Observe the following procedures to construct centralized drain pipe fittings.

Ø 1-5/16 in [O.D.] or more
Downward gradient 1/100 or more

En-8

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

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

Hose band (accessory)

Drain hose (accessory)

• STEP 1 to STEP 3
Butt the insulation
against the unit.

Unit

Hard PVC side

Drain hole

Hose band

3/16 in (4 mm) or less

13/16 in (20 mm)

Drain hose

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

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

leakage.

Applying
area of
adhesive

3/16 in (4 mm) or less

Hose band

Joint pipe
(Locally purchased)

Drain pipe (Ø 3/4 in [I.D.]; Ø 1-1/16 in
[O.D.]) (Locally purchased)

Slit

STEP 1

Press firmly

Press firmly

Slit

Press firmly

STEP 2

Slit

Press firmly

Press firmly

Roll the
insulation over
the joint.

STEP 3

• FINISH

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

• When drain pump is used.

CAUTION

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

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

CAUTION

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

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

the instructions as in the figures.
To avoid space with Drain hose and Hose band, press firmly the Drain hose insulation B.

Ensure there is
no space.

Drain hose
insulation B
(accessory)

Do not cover the
panel window.

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

Do not cover the
control box cover.

NOTE: Check for drainage (When drain pump is used)

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

NOTE: Check for drainage (When drain pump is not used)

Pour about 1 liter of water from the airflow outlet to the dew tray. Check for any
abnormalities such as strange noises.

En-9

CAUTION

Make sure the drain water is properly drained.

3.5. Pipe installation

3.5.1. Pipe connection

CAUTION

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

nFlaring

Use special pipe cutter and flare tool designed for R410A pipework.
(1) Cut the connection pipe to the necessary length with a pipe cutter.
(2) Hold the pipe downward so that cuttings will not enter the pipe and remove any burrs.
(3) Insert the flare nut (always use the flare nut attached to the indoor unit(s) and outdoor

unit or branch box respectively) onto the pipe and perform the flare processing with a
flare tool. Use the special R410A flare tool, or the conventional flare tool. Leakage of
refrigerant may result if other flare nuts are used.

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

entering the pipes.

Check if [L] is flared uniformly and

B

Die

A

Pipe

Pipe outside diameter

[in (mm)]

1/4 (6.35)

3/8 (9.52) 1/2 (13.2)
1/2 (12.70) 5/8 (16.6)
5/8 (15.88) 3/4 (19.7)
3/4 (19.05) 15/16 (24.0)

When using conventional flare tools to flare R410A pipes, the dimension A should be ap­proximately 0.020 in (0.5 mm) more than indicated in the table (for flaring with R410A flare
tools) to achieve the specified flaring. Use a thickness gauge to measure the dimension A.

Width across

flats

Pipe outside diameter [in (mm)]

Dimension A [in (mm)]

Flare tool for R410A,

1/4 (6.35) 11/16 (17)

3/8 (9.52) 7/8 (22)
1/2 (12.70) 1 (26)
5/8 (15.88) 1-1/8 (29)
3/4 (19.05) 1-7/16 (36)

nBending pipes

• To prevent breaking of the pipe, avoid sharp bends.

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

• The pipes are shaped by your hands. Be careful not to collapse them.

• Bend R 2-3/4 in (70 mm) or more with a pipe bender.

• Do not bend the pipes in an angle more than 90°.

• When pipes are repeatedly bend or stretched, the material will harden, making it difficult
to bend or stretch them anymore.

• Do not bend or stretch the pipes more than 3 times.

• When bending the pipe, do not bend it as
is. The pipe will be collapsed. In this case,
cut the insulating pipe with a sharp cutter
as shown on the right, and bend it after
exposing the pipe. After bending the pipe
as you want, be sure to put the heat insu­lating pipe back on the pipe, and secure it
with tape.

is not cracked or scratched.

L

clutch type

0 to 0.020

(0 to 0.5)

CAUTION

Insulating
pipe

Cutter

Cut line

Dimension B [in (mm)]

3/8 (9.1)

Width across flats

of Flare nut [in (mm)]

Pipe

nFlare connection

CAUTION

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

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

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

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

• Connect the piping so that the control box cover can easily be removed for servic­ing when necessary.

• In order to prevent water from leaking into the control box, make sure that the pip­ing is well insulated.

• When flared joints are reused indoors, the flare part shall be re-fabricated.

When the flare nut is tightened properly by your hand, hold the body side coupling with
a wrench, then tighten with a torque wrench. (Refer to the following table for the flare nut
tightening torques.)

Tighten with 2 wrenches.

Holding wrench

Torque wrench

Indoor unit pipe
(Body side)

Flare nut [in (mm)] Tightening torque [ft·lb (N·m)]

1/4 (6.35) dia. 12 to 13 (16 to 18)

3/8 (9.52) dia. 24 to 31 (32 to 42)
1/2 (12.70) dia. 36 to 45 (49 to 61)
5/8 (15.88) dia. 46 to 55 (63 to 75)
3/4 (19.05) dia. 66 to 81 (90 to 110)

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

Flare nut

Connection pipe

3.6. Electrical wiring

WARNING

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

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

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

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

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

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

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

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

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

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

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

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

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

• Connect the connection cable firmly to the terminal board. Imperfect installation may
cause a fire.

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

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

• Perform wiring work in accordance with standards so that the air conditioner can be

operated safely and positively.

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

codes.

En-10

CAUTION

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

- Do not remove the fuse while the power is on.

- Do not disconnect the wiring while the power is on.

- It is recommended to position the outlet connection in a high position. Place the
cords so that they do not get tangled.

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

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

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

• Never bundle the power supply cable and transmission cable, remote controller
cable together. Separate these cable by 2 in (50 mm) or more. Bundling these cables
together will cause miss operation or breakdown.

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

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

- Cut power (breaker) off.

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

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

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

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

3.6.1. Wiring system diagram
nStandard pair

Connection cable

Indoor unit

Wired remote controller cable

Indoor unit

Ground (Earth) line

Power line

Control line

Outdoor unit

Y1
Y2

1
2

nFlexible multi-split type

Connection cable

Indoor unit Outdoor unit

Ground (Earth) line

Power line

UNIT A

3.6.2. Connection cable preparation

nConnection cable

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

Ground (Earth)

2-3/16 in (55mm)

wire

2-9/16 in (65 mm)

• Use a 4-core wire cable.

Conduit connector

nRemote controller cable

1-3/16 in (30 mm)

3.6.3. How to connect wiring to the terminals
nCaution when wiring cable

To strip off the insulation of a lead wire, always use a special tool such as a wire stripper.
If there is no special tool, carefully strip off the insulation by using a knife or other utensil.

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

terminal block.

(2) Securely clamp the ring terminals to the wires by using an appropriate tool so that the

wires do not come loose.

Strip : 3/8 in (10 mm)

(3) Connect specified wires securely, and fasten them so that there is no stress applied on

the terminals.

(4) Use a screwdriver with an appropriate bit size to tighten the terminal screws. Using of

screwdriver with inappropriate bit size will damage the screw heads, and the screws
will not be tightened properly.

(5) Do not overtighten the terminal screws. Otherwise, the screws may break.

Screw with special washer

Wire

(6) Refer to the table for the terminal screw tightening torques.
(7) Do not fix 2 power supply cables with 1 screw.

Ring terminal

Terminal blocks

Ring terminal

Sleeve

Screw with special washer

Ring terminal

Wire

Tightening torque [lbf·in (N·m)]

M4 screw 11 to 16 (1.2 to 1.8)

3.6.4. Connection wiring

Indoor unit

Control line

UNIT B

Wired remote controller cable

Indoor unit

Y1
Y2

1
2

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

CAUTION

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

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

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

Cover

Screw

En-11

nConnection cable

CN75

CN11

CN47

CN48

CN65

Ground (Earth)

nRemote controller cable

12 3

Outdoor
unit

Y1 Y2

REMOTE CONTROL

Control line

Power line

Conduit connector
(power supply)

1

2

Ex IN

Do not bind the power supply cable and other cables together.
(4) Seal the cable outlet or other gaps with putty to prevent dew condensation or insect

from entering the electric control box.

(5) Replace the control box cover.
(6) Fix the conduit with the supporters as shown below.

Conduit

Supporter

Indoor unit

30 in

(756 mm)

or less

54 in

(1,360 mm)

or less

54 in

(1,360 mm)

or less

54 in

(1,360 mm)

or less

CAUTION

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

3.7. Remote controller setting

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

Ground (Earth)

Remote
controller
cable

Remote controller

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

(3) After wiring is complete, secure the remote controller cable,conduit connector.

2

Ex IN

1

Y1 Y2

REMOTE CONTROL

12 3

Remote controller
cable

Conduit connector
(power supply)

Lock nut

Attach the conduit connector on
the wiring connecting port.
(The grommet edging and the
connection cable clamp are not
used.)

Lock nut

Conduit connector

Cable tie
(medium, accessories)

Avoid covering the air
inlet with the wiring.

4. OPTIONAL INSTALLATION WORK

4.1. Optional kit installation

WARNING

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

2

Ex IN

1

Y2

Y1

REMOTE CONTROL

12 3

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

Connector No. Option type

CN47*1 External output

CN8 Remote sensor
CN48 IR Receiver
CN11 Auto louver grille kit

CN65

CN75

Other optional parts (External input and output PCB, Modbus

converter, KNX convertor, W-LAN interface *2 etc.) may be con-

nectable. Refer to the technical data for details.

*1: For external output terminal setting, refer to Function No.60 in “6. F UN CT IO N S E T-

TING”.

*2: Be sure to connect the W-LAN interface to CN75 .

CN8

Conduit connector
(power supply)

En-12

Avoid touching the ceiling
with the wiring

Ceiling

4.2. External input and output

4.2.1. External input

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

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

•

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

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

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

Terminal

1

Y1 Y2

REMOTE CONTROL

● Dry contact terminal

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

*1

Connected device

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

2

Ex IN

Connected device

Terminal
(External in)

nOperation behavior

● Input signal type

ON

Edge

OFF

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

Input signal Command

OFF → ON Operation
ON → OFF Stop

When function setting is “Forced stop” mode.

Input signal Command

OFF → ON Forced stop
ON → OFF Normal

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

remote controller is restricted.

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

Input signal Command

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

4.2.2. External output

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

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

• Output voltage: Hi DC12V±2V, Lo 0V.

• Permissible current: 50mA

nOutput select

When interlocking with external device

Connected

device

Relay (locally purchased)

PCB

CN47

■Operation behavior

Functions of the external output terminal can be switched.

(♦... Factory setting)

Function setting Status Output voltage

00

01 - 04

05

06

60

07 - 08

09

10

11

Refer to the Design & technical manual.

Stop 0 V

Operation DC 12 V
OFF 0 V
Cooling thermostat ON DC 12 V
OFF 0 V
Heating operation ON DC 12 V
Stop 0 V
Operation DC 12 V
OFF 0 V
Cooling thermostat ON DC 12 V
Normal 0 V
Error DC 12 V
Indoor unit fan stop 0 V
Indoor unit fan operation DC 12 V
External heater OFF 0 V
External heater ON DC 12 V

4.2.3. Connection methods

nWire modification

• Remove insulation from wire attached to wire kit connector.

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

• Connect the wire with connecting wire with solder.

IMPORTANT: Be sure to insulate the connection between the wires.

Option parts

Locally purchased

Solder and insulate the connected parts.

• Connecting wires to the terminals.

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

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

External output wire

4.3. Remote sensor (Optional parts)

4.3.1. Connection method

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

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

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

4.3.2. Setting for room temperature correction

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

• Function Number “30”:

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

• Function Number “31”:

Set the Setting Number to “01”.

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

♦

When displaying “Operation/Stop”

or

Resistor

LED

Connected device

PCB

CN47

En-13

4.4. IR receiver unit (Optional parts)

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

4.4.1. Connection method

• Use 9 pins for receiver unit cable.

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

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

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

4.7. Optional parts cable binding

Bushing**

4.5. Auto louver grille (Optional parts)

4.5.1. Connection method

• Wiring arrangement

Controller PCB

CN11

2

Ex IN

1

Y1 Y2

REMOTE CONTROL

DIP SW 101
( " 2 " : ON)

CAUTION

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

(a) Opening this

knockout hole

12 3

(b) Bushing
(Accessory of

optional parts)

Auto louver grille cable

Cable tie
(medium,
accessories)

4.6. Other optional parts

4.6.1. Connection method

• Connection terminals and wiring arrangement

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

Controller PCB

Other optional parts cables

Remote controller
cable

Auto louver
grille cable

Power supply cable

Avoid touching the ceiling with the wirings.

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

Cable tie
(medium,
accessories)

Avoid covering the air
inlet with the wirings.

Ceiling

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

CAUTION

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

5. REMOTE CONTROL INSTALLATION

5.1. Group control

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

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

Connect up to 16 indoor units in a system.

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

BCDE

A

Remote
controller

A, B, C, D, E : Remote controller cable.
A+B+C+D+E ≤ 1,640 ft (500 m).

Example of wiring method

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

Y1

Y2

Y1

Y2

Y1

Y2

Y1

Y2

En-14

CN65

CN8

CN75

CN48

Core

CN47

External output

2

Ex IN

1

Y2

Y1

REMOTE CONTROL

12 3

External input

Y1

Y2

Remote controller

Remote con­troller cable

Remote controller cable

5.2. Multiple remote control

AB

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

I.U.

I.U.

A

Primary Primary Secondary

A, B : Remote controller cable. (Refer to “2.5. Electrical requirement”)

A ≤ 1,640 ft (500 m), A+B ≤ 1,640 ft (500 m)

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

•

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

Indoor unit

Y2

Y1

Y2

Y1

Primary unit

Remote con­troller cable

Y2

Y1

Secondary unit

Remote controller

5.3. DIP switch 101 setting

(1) If contained drain pump is not used, set the drainage function to “Disable” in the

drainage function switching.

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

(3) The fan delay setting can be used when the auxiliary heater is mounted.
When the operation is stopped when the indoor unit is operating with an auxiliary

heater, the operation continues 1 minutes.

Change the following settings by using the DIP switch.

(♦... Factory setting)

DIP switch 101

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

● Switching position

DIP SW state

ON OFF

Details

6. FUNCTION SETTING

6.1. Function details

nFilter sign

Select appropriate intervals for displaying the filter sign on the indoor unit according to the
estimated amount of dust in the air of the room.

If the indication is not required, select “No indication” (03).

Function num-

ber

Setting

value

Setting description

00 Standard (400 hours)

11

01 Long inter val (1000 hours)
02 Short interval (200 hours)
03 No indication ♦

nStatic pressure

CAUTION

If the applicable static pressure does not match the static pressure mode, the static
pressure mode may be changed to another mode manually.

Select the appropriate static pressure according to the installation conditions.
It is necessary to set up a static pressure mode for each usage of static pressure.

Static pressure can be set at site.
Relation between set values and static pressure are as the following table.

• Function setting can be performed with the wired or wireless remote controller.

(The remote controller is optional equipment)

• Refer to the wired or wireless remote controller manual for detailed setting information.

Function num-

ber

Setting

value

Setting description

00 0 Pa

01 10 Pa

02 20 Pa

03 30 Pa

04 40 Pa

26

05 50 Pa

06 60 Pa

07 70 Pa

08 80 Pa

09 90 Pa

31 ♦ 25 Pa [Standard]

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

Range of static pressure 0 to 90 Pa

(♦... Factory setting)

(♦... Factory setting

)

DIP SW 101

2

Ex IN

1

Y1 Y2

REMOTE CONTROL

12 3

En-15

nRoom temperature control for indoor unit sensor

Depending on the installed environment, correction of the room temperature sensor may
be required.
Select the appropriate control setting according to the installed environment.
The temperature correction values show the difference from the “Standard setting” (00)
(manufacturer’s recommended value).

Function number

30

(For cooling)31(For heating)

Setting

value

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

Setting description

(♦... Factory setting)

More

Cooling

Less

Heating

Less

Cooling

More

Heating

nRemote controller custom code

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

Function

number

44

Setting

value

00 A ♦
01 B
02 C
03 D

Setting description

(♦... Factory setting)

nExternal input control

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

Function

number

46

Setting

value

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

Setting description

(♦... Factory setting)

nRoom temperature sensor switching (Aux.)

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

Function

number

48

Setting

value

00 Both
01 Wired remote controller ♦

Setting description

(♦... Factory setting)

nRoom temperature control for wired remote controller sensor

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

Function number

35

(For cooling)

36

(For heating)

Setting

value

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

Setting description

(♦... Factory setting)

More

Cooling

Less

Heating

Less

Cooling

More

Heating

nAuto restart

Enable or disable automatic restart after a power interruption.

Function

number

40

* Auto restart is an emergency function such as for power outage etc. Do not attempt to

use this function in normal operation. Be sure to operate the unit by remote controller or
external device.

Setting

value

00 Enable ♦
01 Disable

Setting description

(♦... Factory setting)

nRoom temperature sensor switching

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

Function

number

42

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

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

Setting

value

00 Indoor unit ♦
01 Both

Setting description

(♦... Factory setting)

nIndoor unit fan control for energy saving for cooling

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

Function

number

49

00: When the outdoor unit is stopped, the indoor unit fan operates continuously following

the setting on the remote controller.

01: When the outdoor unit is stopped, the indoor unit fan operates intermittently at a very

low speed.

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

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

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

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

remote controller.

Setting

value

00 Disable
01 Enable
02 Remote controller ♦

Setting description

(♦... Factory setting)

nSwitching functions for external output terminal

Functions of the external output terminal can be switched.

Function

number

60

Refer to the Design & technical manual.

Setting

value

00 Operation status ♦

01-04 Cooling thermostat status

05 Heating operation status
06 Operation status

07-08 Cooling thermostat status

09 Error status
10 Fresh air control
11 Auxiliary heater

Setting description

(♦... Factory setting)

En-16

Control switching of external heaters

■

Sets the control method for the external heater being used.
For details of the control method, see the Design & Technical Manual.

Function

number

61

Operating temperature switching of external heaters

■

• Sets the temperature conditions when the external heater is ON.

• For the temperature conditions, see “Temperature conditions when the external heater is
ON”. For a more detailed explanation, see the Design & Technical Manual.

Function

number

62

Setting

value

00 Auxiliar y heater control 1 ♦
01 Auxiliary heater control 2
02 Heat pump prohibition control

03

04

05 Auxiliary heater control by outdoor temperature 3
06 Auxiliary heat pump control

07

08

09

Setting

value

00 Setting 0 ♦
01 Setting 1
02 Setting 2
03 Setting 3
04 Setting 4
05 Setting 5
06 Setting 6
07 Setting 7
08 Setting 8
09 Setting 9
10 Setting 10
11 Settin g 11
12 Setting 12
13 Setting 13
14 Set ting 14
15 Set ting 15
16 Setting 16
17 Setti ng 17

Setting description

Heater selection control

using outdoor temperature 1

Heater selection control

using outdoor temperature 2

Auxiliary heat pump control

by outdoor temperature 1

Auxiliary heat pump control

by outdoor temperature 2

Auxiliary heat pump control

by outdoor temperature 3

Setting description

(♦... Factory setting)

(♦... Factory setting)

Temperature conditions when the external heater is ON/OFF

Temperature (t) = Room temperature - set temperatur

Set value of function: 61

00 01 to 09

ON OFF ON OFF

00

t < -5.4°F (-3°C) t ≥ -1.8°F (-1°C) t ≤ -0.9°F (-0.5°C) t ≥ +0.9°F (+0.5°C)

01

t < -3.6°F (-2°C) t ≥ -1.8°F (-1°C) t ≤ -1.8°F (-1°C) t ≥ +0.9°F (+0.5°C)

02

t < -3.6°F (-2°C) t ≥ -1.8°F (-1°C) t ≤ -3.6°F (-2°C) t ≥ +0.9°F (+0.5°C)

03

t < -5.4°F (-3°C) t ≥ -1.8°F (-1°C) t ≤ -5.4°F (-3°C) t ≥ +0.9°F (+0.5°C)

04

t < -7.2°F (-4°C) t ≥ -1.8°F (-1°C) t ≤ -7.2°F (-4°C) t ≥ +0.9°F (+0.5°C)

05

t < -9.0°F (-5°C) t ≥ -1.8°F (-1°C) t ≤ -9.0°F (-5°C) t ≥ +0.9°F (+0.5°C)

06

t < -5.4°F (-3°C) t ≥ -0.9°F (-0.5°C) t ≤ -0.9°F (-0.5°C) t ≥ 0°F (0°C)

07

t < -3.6°F (-2°C) t ≥ -0.9°F (-0.5°C) t ≤ -1.8°F (-1°C) t ≥ 0°F (0°C)

08

t < -3.6°F (-2°C) t ≥ -0.9°F (-0.5°C) t ≤ -3.6°F (-2°C) t ≥ 0°F (0°C)

09

t < -5.4°F (-3°C) t ≥ -0.9°F (-0.5°C) t ≤ -5.4°F (-3°C) t ≥ 0°F (0°C)

10

t < -7.2°F (-4°C) t ≥ -0.9°F (-0.5°C) t ≤ -7.2°F (-4°C) t ≥ 0°F (0°C)

11

Set value of function: 62

t < -9.0°F (-5°C) t ≥ -0.9°F (-0.5°C) t ≤ -9.0°F (-5°C) t ≥ 0°F (0°C)

12

t < -5.4°F (-3°C) t ≥ 0°F (0°C) t ≤ -0.9°F (-0.5°C) t ≥ -0.9°F (-0.5°C)

13

t < -3.6°F (-2°C) t ≥ 0°F (0°C) t ≤ -1.8°F (-1°C) t ≥ -0.9°F (- 0.5°C)

14

t < -3.6°F (-2°C) t ≥ 0°F (0°C) t ≤ -3.6°F (-2°C) t ≥ -0.9°F (- 0.5°C)

15

t < -5.4°F (-3°C) t ≥ 0°F (0°C) t ≤ -5.4°F (-3°C) t ≥ -0.9°F (-0.5°C)

16

t < -7.2°F (-4°C) t ≥ 0°F (0°C) t ≤ -7.2°F (-4°C) t ≥ -0.9°F (-0.5°C)

17

t < -9.0°F (-5°C) t ≥ 0°F (0°C) t ≤ -9.0°F (-5°C) t ≥ -0.9°F (-0.5°C)

Outdoor temperature zone boundary temperature A

■

Setting required if changing of the outdoor temperature setting for heat pump prohibition
zone is required when auxiliary heater control by outdoor temperature 1 and 2 are per­formed on the indoor unit.

For details of the control method, see the Design & Technical Manual.

Function

number

66

Outdoor temperature zone boundary temperature B

■

Setting required if changing of the outdoor temperature setting for heat pump only zone
is required when auxiliary heater control by outdoor temperature 1 is performed on the
indoor unit.

For details of the control method, see the Design & Technical Manual.

Function

number

67

Standby time for auxiliary equipment operation

■

Sets the standby time until the auxiliary equipment operation starts during primary equip­ment operation.

Function

number

71

Heat pump backup setting

■

Enables or disables the heat pump backup instruction from the outdoor unit. This function
will be usable provided that the corresponding outdoor unit is connected.

Function

number

72

Setting

value

00 -4.0 °F (-20 °C) ♦

01 -0.4 °F (-18 °C)
02 3.2 °F (-16 °C)
03 6.8 °F (-14 °C)
04 10.4 °F (-12 °C)
05 14.0°F (-10 °C)
06 17.6 °F (-8 °C)
07 21.2 °F (-6 °C)
08 24.8 °F (-4 °C)

Setting

value

00 42.8 °F (6 °C) ♦

01 14.0 °F (-10 °C)
02 17.6 °F (-8 °C)
03 21.2 °F (-6 °C)
04 24.8 °F (-4 °C)
05 28.4°F (-2 °C)

06 32.0 °F (0 °C)

07 35.6 °F (2 °C)
08 39.2 °F (4 °C)
09 42.8 °F (6 °C)
10 46.4 °F (8 °C)
11 50.0 °F (10 °C)
12 53.6 °F (12 °C)
13 57.2 °F (14 °C)
14 60.8 °F (16 °C)
15 64.4 °F (18 °C)

Setting

value

00 Disable ♦
01 1 minutes
02 2 minutes

⁞ ⁞

98 98 minutes
99 99 minutes

Setting

value

00 Disable ♦
01 Enable

Setting description

Setting description

Setting description

Setting description

(♦... Factory setting)

(♦... Factory setting)

(♦... Factory setting)

(♦... Factory setting)

nEmergency heat for external output terminal

Enables or disables emergency heat input.
To use this function, select “External heater output” after entering “Function Number 60”. For
more information, please refer to the Design & technical manual.

Function

number

73

Setting

value

00 Disable ♦
01 Enable

Setting description

(♦... Factory setting)

En-17

Fan delay time

■

Sets the fan delay time when the heater is turned off.

Function

number

74

Setting

value

00 1 minutes ♦
01 50 seconds
02 40 seconds
03 30 seconds

Setting description

(♦... Factory setting)

8. TEST RUN

8.1. Check items

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

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

External heater use in defrosting

■

Enables or disables the external heater use in defrosting.
When using function, inappropriate heater selection may cause cold air in defrosting.

Function

number

75

Setting

value

00 Disable ♦
01 Enable

Setting description

(♦... Factory setting)

nSetting record

Record any changes to the settings in the following table.

No. Setting description Setting value

11 Filter sign
26 Static pressure
30

Room temperature control for indoor
unit sensor

31 Heating
35

Room temperature control for wired
remote controller sensor

36 Heating
40 Auto restart
42 Room temperature sensor switching
44 Remote controller custom code
46 External input control
48 Room temperature sensor switching (Aux.)
49 Indoor unit fan control for energy saving for cooling
60 Switching functions for external output terminal
61 Control switching of external heaters
62 Operating temperature switching of external heaters
66 Outdoor temperature zone boundary temperature A
67 Outdoor temperature zone boundary temperature B
71 Standby time for auxiliary equipment operation
72 Heat pump backup setting
73 Emergency heat for external output terminal
74 Fan delay time
75 External heater use in defrosting

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

Cooling

Cooling

7. CHECK LIST

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

Check items Check box

Has the indoor unit been installed correctly?
Has there been a check for gas leaks (refrigerant pipes)?
Has heat insulation work been completed?
Does water drain easily from the indoor units?
Is the voltage of the power source the same as that indicated on the label

on the indoor unit?
Are the wires and pipes all connected completely?
Is the indoor unit grounded?
Is the connection cable the specified thickness?
Are the inlets and outlets free of any obstacles?
After installation is completed, has the proper operation and handling

been explained to the user?
Operate the unit according to the operation manual provided, and check

that it is operating normally.

8.2. Operation method

Depending on your installation, choose from the following:

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

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

nBy the indoor unit or IR receiver unit

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

cooling).

(2) T

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

on the remote controller.

The Operation indicator lamp and Timer indicator lamp will simultaneously flash during

•

the test run mode.

nBy the wired remote controller

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

the wired remote controller.

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

9. FINISHING

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

nCoupler heat insulation

CAUTION

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

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

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

• Insulate with the coupler heat insulation (accessories) around the gas pipe and liquid
pipe at indoor unit.

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

• After affixing the coupler heat insulation, secure it with 2 cable tie (large, accessories),
one on each end of the insulation.

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

Coupler heat insulation
(accessories)

No gaps

Indoor unit side

Cable ties

(large, accessories)

Be sure to overlap
the insulation.

(Gas and liquid pipes)

Pipes

10. CUSTOMER GUIDANCE

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

flow switching, and other remote controller operations.

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

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

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

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

En-18

11. ERROR CODES

If you use a wireless remote controller, the lamp on the photo detector unit will output error
codes by way of blinking patterns. If you use a wired remote controller, error codes will ap­pear on the remote control display. Refer to the lamp blinking patterns and error codes in
the table. An error display is displayed only during operation.

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

Error display

OPERATION

lamp

(green)















































●

●



●

●

●





TIMER

(orange)

(1)

(1)

(1)

(1)

(1)

(2)

(2)

(2)

(2)

(2)

(2)

(2)

(3)

(3)

(3)

(3)

(3)

(3)

(4)

(4)

(4)

(5)

(5)

(5)

(5)

(5)

(5)

(5)

(5)

(5)

(6)

lamp



































(10)













●

●



●

●

(10)

●

(15)





(1)

(2)

(5)

(6)

(8)

(1)

(2)

(3)

(4)

(6)

(7)

(9)

(1)

(2)

(3)

(5)

(9)

(1)

(2)

(4)

(1)

(3)

(4)

(5)

(7)

(8)

(9)

(1)

ECONOMY

lamp

(green)

Error code Description

Serial communication error

• Wired remote controller com­munication error

• Server room control communica­tion error

Check run unfinished
Automatic airflow adjustment error

Peripheral unit transmission PCB
connection error

External communication error

Unit number or Refrigerant
circuit address setting error
[Simultaneous multi-split type]

Indoor unit capacity error

Combination error

• Connection unit number
error (indoor secondary unit)
[Simultaneous multi-split type]

• Connection unit number error
(indoor unit or branch unit)
[Flexible multi-split type]

Indoor unit address setting error

Primary unit, secondary unit setup
error [Simultaneous multi-split
type]

Connection unit number error in
wired remote controller system

Power supply interruption error

Indoor unit PCB model information
error

Indoor unit motor electricity
consumption detection error

Manual auto switch error

Indoor unit power supply error for
fan motor

Indoor unit communication circuit
(wired remote controller) error

Room temp. sensor error

Indoor unit heat ex. middle temp.
sensor error

Human sensor error

Indoor unit fan motor error

Drain pump error

Electric air cleaner reverse VDD
error

Filter set error

Damper error

Intake grille error

Indoor unit fan motor 2 error
(Left side fan)

Indoor unit fan motor 3 error
(Right side fan)

Indoor unit error

Outdoor unit reverse/missing
phase and wiring error

OPERATION

lamp

(green)

(6)



(6)



(6)



(6)



(6)



(6)



(7)



(7)



(7)



(7)



(7)



(7)



(7)



(8)



(8)



(8)



(8)



(9)



(9)



(9)



(9)



(9)



(9)



(10)



(10)



(10)



(10)



(13)



Display mode

Error display

TIMER

(orange)

: 0.5s ON / 0.5s OFF

●

◊

: 0.1s ON / 0.1s OFF

( ) : Number of flashing

lamp











(10)



































(10)













ECONOMY

lamp

(green)

(2)

(3)

(4)

(5)

(8)

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(2)

(3)

(4)

(6)

(4)

(5)

(7)

(8)

(9)

(1)

(3)

(4)

(5)

(2)

Error code Description

Outdoor unit main PCB
model information error or
communication error

Inverter error

Active filter error, PFC circuit error

Trip terminal L error

Outdoor unit rush current limiting
resister temp. rise error

Display PCB microcomputers
communication error

Discharge temp. sensor error

Compressor temp. sensor error

Outdoor unit Heat Ex. liquid temp.
sensor error

Outdoor temp. sensor error

Suction Gas temp. sensor error

• 2-way valve temp. sensor error

• 3-way valve temp. sensor error
Heat sink temp. sensor error

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

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

Liquid pipe temp. sensor error

Current sensor error

• Discharge pressure sensor error

• Suction pressure sensor error

• High pressure switch error

Trip detection

Compressor rotor position
detection error (permanent stop)

Outdoor unit fan motor 1 error

Outdoor unit fan motor 2 error

4-way valve error

Coil (expansion valve) error

Discharge temp. error

Compressor temp. error

High pressure error

Low pressure error

Branch boxes error
[Flexible multi-split type]

En-19