Fujitsu ABYA12-24LBTH Installation Manual

INSTALLATION MANUAL

VRF SYSTEM
INDOOR UNIT
Floor / Ceiling Type

Contents

1. SAFETY PRECAUTIONS ............................................. 2

2. ABOUT THE UNIT

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

2.2. Special tool for R410A ........................................... 2

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

2.4. Optional parts ........................................................ 3

3. INSTALLATION WORK

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

3.2. Installation dimension ............................................4

3.3. Installation the unit................................................. 4

4. PIPE INSTALLATION

4.1. Selecting the pipe material .................................... 6

4.2. Pipe requirement ................................................... 7

4.3. Flare connection (pipe connection) .......................7

4.4. Installing heat insulation ........................................ 8

5. INSTALLING DRAIN HOSE ......................................... 9

6. ELECTRICAL WIRING

6.1. Electrical requirement .......................................... 11

6.2. Wiring method ..................................................... 11

6.3. Unit wiring ............................................................ 11

6.4. Connection of wiring ........................................... 13

6.5. External input and external output

(Optional parts) ....................................................13

7. FIELD SETTING

7.1. Setting the address.............................................. 16

7.2. Custom code setting ............................................ 17

7.3. Function setting ................................................... 18

8. MOUNT THE COVER PLATE AND THE INTAKE
GRILLE

8.1. Handling for the pipe take-off part ....................... 19

8.2. Mount the cover plate (Right) .............................. 19

8.3. Mount the cover plate (Left)................................. 20

8.4. Mount the intake grille .........................................20

9. TEST OPERATION

9.1. Test operation using PCB (Outdoor unit) ............. 20

9.2. Test operation using remote controller ................ 20

10. CHECK LIST ............................................................... 20

11. ERROR CODES ......................................................... 21

PART NO. 9367701070-05

For authorized service personnel only.

English

En-2

1. SAFETY PRECAUTIONS

Be sure to read this Manual thoroughly before installation.•
The warnings and precautions indicated in this Manual •
contain important information pertaining to your safety. Be
sure to observe them.
Hand this Manual, together with the Operating Manual, to the •
customer. Request the customer to keep them on hand for
future use, such as for relocating or repairing the unit.

WARNING

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

• Request your dealer or a professional installer to install
the indoor unit in accordance with this Installation Manual.
An improperly installed unit can cause serious accidents
such as water leakage, electric shock, or fire. If the
indoor unit is installed in disregard of the instructions in
the Installation Manual, it will void the manufacturer’s
warranty.

• Do not turn ON the power until all work has been
completed. Turning ON the power before the work is
completed can cause serious accidents such as electric
shock or fi re.

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

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

• Except for EMERGENCY, never turn off main as well
as sub breaker of the indoor units during operation. It
will cause compressor failure as well as water leakage.
First, stop the indoor unit by operating the controller,
converter or external input device and then cut the
breaker.
Make sure to operate through the controller, converter or
external input device.
When the breaker is designed, locate it at a place where
the users cannot start and stop in the daily work.

CAUTION

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

2. ABOUT THE UNIT

1

2.1. Precautions for using R410A refrigerant

WARNING

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

• If there is a refrigerant leak, make sure that it does not
exceed the concentration limit. If a refrigerant leak
exceeds the concentration limit, it can lead to accidents
such as oxygen starvation.

WARNING

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

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

]1

2.2. Special tool for R410A

WARNING

• To install a unit that uses R410A refrigerant, use dedicated
tools and piping materials that have been manufactured
specifically for R410A use. Because the pressure of
R410A refrigerant is approximately 1.6 times higher
than the R22, fai lure to use dedicated piping material
or improper installation can cause rupture or injury.
Furthermore, it can cause serious accidents such as
water leakage, electric shock, or fi re.

Tool name Changes

Gauge manifold

The pressure in the refrigerant
system is extremely high and can­not be measured with a conven­tional gauge. To prevent erroneous
mixing of other refrigerants, the
diameter of each port has been
changed. It is recommended to
use a gauge manifold with a high
pressure display range of –0.1 to

5.3 MPa and a low pressure display
range of –0.1 to 3.8 MPa.

Charging hose

To increase pressure resistance, the
hose material and base size were
changed.
(The charging port thread diameter
for R410A is 1/2 UNF 20 threads per
inch.)

Vacuum pump

A conventional vacuum pump can be
used by installing a vacuum pump
adapter.
Be sure that the pump oil does
not backflow into the system. Use
one capable for vacuum suction of
–100.7 kPa (5 Torr, –755 mmHg).

Gas leakage detector

Special gas leakage detector for
R410A refrigerant.

En-3

]1

2.3. Accessories

WARNING

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

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

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

Name and Shape Q’ty Application

Operating Manual

1

Installation Manual

1

(This book)

Cover plate (Left)

1

Cover plate (Right)

1

Tapping screw
(M4

×

10mm)

2

Installation
template

1

For positioning the
indoor unit
For under ceiling type

Bracket (Left)

1

For suspending
the indoor unit from
ceiling

Bracket (Right)

1

Special nut

4

Wall bracket

2

For suspending the
indoor unit on the wall

Tapping screw
(M4

×

20mm)

6

For fi xing the wall
bracket

Coupler heat
insulation

2

For indoor side pipe
joint

Binder

Large 4

For fi xing the coupler
heat insulation

Medium 3

For power supply,
transmission and
remote controller cable
binding

Drain hose

1

For installing drain
pipe

Hose Band

1

For installing drain
hose

Drain hose insulation

1

Adhesive type
100 × 220

VT wire

1

For fi xing the drain
hose L 280 mm

Insulation (Pipe)

1

Adhesive type
160 × 110

Silencer pipe

1

Connect the silencer
pipe to the small (liquid)
pipe.

]

1

2.4. Optional parts

Description Part No. Application

Auxiliary pipe

9374714025

For indoor side pipe
joint
(For AB18, AB24)

External output wire 9379529006 For control output port

External input
(voltage) wire

9368779016 For control input port

External input
(no voltage) wire

9368779009 For control input port

En-4

3. INSTALLATION WORK

Especially, the installation place is very important for the split
type air conditioner because it is very diffi cult to move from
place to place after the fi rst installation.

]

1

3.1. Selecting an installation location

Decide the mounting position together with the customer as
follows.

WARNING

• Select installation locations that can properly support the
weight of the indoor unit. Install the units securely so that
they do not topple or fall.

CAUTION

Do not install the indoor unit in the following areas:

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

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

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

• Area that can cause combustible gas to leak, contains
suspended carbon fi bers or fl ammable dust, or volatile
inflammables such as paint thinner or gasoline. If gas
leaks and settles around the unit, it can cause a fi re.

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

• Do not use the unit for special purposes, such as storing
food, raising animals, growing plants, or preserving
precision devices or art objects.

It can degrade the quality of the preserved or stored

objects.

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

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

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

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

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

• Take precautions to prevent the unit from falling.

(1) Install the indoor unit on a place having a suffi cient

strength so that it withstands against 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 connection to the outdoor unit is

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

installed.

(6) Install the unit where the drain pipe can be easily installed.
(7) Install the unit where noise and vibrations are not

amplifi ed.

(8) Take servicing, etc., into consideration and leave the

spaces. Also install the unit where the fi lter can be
removed.

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

sunlight.

]

1

3.2. Installation dimension

Floor console

300

or more

Left Right

Unit : mm

300

or more

Under ceiling

Ceiling

Ceiling

Indoor unit

Left

150

or more

300

or more

2300

or more

Unit : mm

Floor

20 or more

Right

]

1

3.3. Installation the unit

WARNING

• Install the air conditioner in a location which can
withstand a load of 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.

En-5

When installing set to wall install the accessory wall bracket at
the position as shown in the fi gure, and mount the set to it.

Unit : mm

Wall bracket

Side of set

990

500

65

655

530

45

65

Ø

50

125 100

Ø

100

245

B. Under ceiling type

Using the installation template, drill holes for piping and
suspension bolts (for holes).

Unit : mm

Installation
template

200

Drilling position
for suspension
bolt

Ceiling

Wall

Drilling position for piping

900

B-1. Drilling for piping

Select piping and drain directions.

To p

Rear
(Install the drain hose
in this direction.)

Right

Hole

VIEW

For direction, bore the oval hole shown in the above fi gure.

CAUTION

• Install the drain hose at the rear; it should not be installed
on the top or right side.

When the directions are selected, drill 80 mm and 50 mm or
150 mm dia. hole on the wall so that the hole is tilted down­ward toward the outdoor for smooth water fl ow.

Unit : mm

Wall

6

Indoor side Outdoor side

3.3.1. Preparing indoor unit installation

Open the intake grille and remove the 3 screws.

Machine screw

Tapping screw

Tapping screw

Intake grille

Remark : The main unit can be wired before the indoor unit is
installed.
Select the most appropriate installation order.

3.3.2. Indoor unit installation
A. Floor console type
Drilling for piping

Select piping and drain directions.
The piping and drain can be made in 3 directions as shown
below.

VIEW

Hole

For direction, bore the oval hole shown in the above fi gure.
The drain hose can be connected to either the left or right
side.

Drain hose
(Right side)

Drain hose
(Left side)

When the directions are selected, drill a 10 cm dia. hole on
the wall so that the hole is tilted downward toward the outdoor
for smooth water fl ow.
When the pipe is led out from the rear, make a hole as shown
in the fi gure, at the position shown.

Unit : mm

6

100

Wall

Indoor side Outdoor side

En-6

B-2. Drilling the holes and attaching the

suspension bolts

Drill Φ25 mm holes at the suspension bolt locations, then
install the bolts.

Bolt Strength 980 to 1470 N (100 to 150 kgf)

ø25 mm

Ceiling panel

20 to 50 mm

[If using anchor bolts]

Drill holes for anchor bolts at the locations at which you will
set the suspension bolts. Note that anchor bolts are M10 bolts
(to be obtained locally).

Anchor-Bolt Strength 980 to 1470 N (100 to 150 kgf)

Ceiling

20 to
50 mm

M10 Anchor bolt
(Field supply)

B-3. Installing Brackets

Install the bracket with nuts, spring washers.

Bracket (Right)

Bracket

Bracket (Left)

Special nut A
(Accessories)

Ceiling panel

Spring washer
(Field supply)

M10 Nut (Field supply)

M10 Nut (Field supply)

B-4. Installing indoor unit

Reset the hex bolts as shown in the fi gure

Unit : mm

Indoor unit

Hex bolt

8 to 13

Apply the indoor unit to the brackets.

Indoor unit

Bolt

Bracket

Now, securely tighten the hex bolts in both sides.

3.3.3. Barrier and RFM base removal and
installation

(1) Remove the barriers by removing the 4 fi xing screws

(2 screws each).

(2) Remove the RFM base by removing the 2 fi xing screws

and unhooking the 1 hook.

(3) After completing the work, install the barriers and RFM

base as they were originally.

RFM base

Fixing screw
(2 positions)

Barriers

Fixing screw
(2 positions)

Hook

Install the barriers in the correct direction.

4. PIPE INSTALLATION

]

CAUTION

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

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

]

1

4.1. Selecting the pipe material

CAUTION

• Do not use existing pipes.

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

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

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

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

• 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.

En-7

Thicknesses of Annealed Copper Pipes (R410A)

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

6.35 (1/4) 0.80

9.52 (3/8) 0.80

12.70 (1/2) 0.80

15.88 (5/8) 1.00

19.05 (3/4) 1.20

1

4.2. Pipe requirement

CAUTION

• Refer to the Installation Manual of the outdoor unit
for description of the length of connecting pipe or for
difference of its elevation.

Use pipe with water-resistant heat insulation.•

CAUTION

• Install heat insulation around both the gas and liquid
pipes. Failure to do so may cause water leaks.
Use heat insulation with heat resistance above 120 °C.
(Reverse cycle model only)
In addition, if the humidity level at the installation location
of the refrigerant piping is expected to exceed 70 %,
install heat insulation around the refrigerant piping.
If the expected humidity level is 70-80 %, use heat
insulation that is 15 mm or thicker and if the expected
humidity exceeds 80 %, use heat insulation that is 20
mm or thicker. If heat insulation is used that is not as
thick as specifi ed, condensation may form on the surface
of the insulation.
In addition, use heat insulation with heat conductivity of

0.045 W/(m·K) or less (at 20 °C).

1

4.3. Flare connection (pipe connection)

4.3.1. Flaring

• Use special pipe cutter and fl are tool exclusive for R410A.
(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 fl are nut (always use the fl are nut attached to

the indoor and outdoor units respectively) onto the pipe
and perform the fl are processing with a fl are tool. Use the
special R410A fl are tool, or the conventional fl are tool.
Leakage of refrigerant may result if other fl are nuts are
used.

(4) Protect the pipes by pinching them or with tape to prevent

dust, dirt, or water from entering the pipes.

L

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

Die

Pipe

A

B

Pipe outside

diameter

[mm (in.)]

Dimension A [mm]

Dimension B

-00.4

[mm]

Flare tool for R410A,

clutch type

6.35 (1/4)

0 to 0.5

9.1

9.52 (3/8) 13.2

12.70 (1/2) 16.6

15.88 (5/8) 19.7

19.05 (3/4) 24.0

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

Pipe outside

diameter [mm (in.)]

Width across flats

of Flare nut [mm]

6.35 (1/4) 17

9.52 (3/8) 22

12.70 (1/2) 26

15.88 (5/8) 29

19.05 (3/4) 36

4.3.2. Bending pipes

The pipes are shaped by your hands or pipe bender. Be •

careful not to collapse them.
Do not bend the pipes in an angle more than 90°.•
When pipes are repeatedly bend or stretched, the material •

will harden, making it diffi cult to bend or stretch them any

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

CAUTION

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

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

Width across

fl ats

En-8

4.3.3. Pipe connection

Connect the silencer pipe to the small (liquid) pipe.
Centering the pipe against port on the indoor unit, turn the
fl are nut with your hand.
Be sure that the small pipe is completely installed before
connecting the large pipe.

Indoor unit side

Silencer pipe
(Accessories)

CAUTION

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

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

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

If necessary, cut the silencer pipe and use it.

Silencer pipe
(Accessories)

CAUTION

• 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 a hazardous gas if the refrigerant
comes into contact with a fl ame.

When the fl are nut is tightened properly by your hand,
hold the body side coupling with a separate spanner, then
tighten with a torque wrench.

Connection pipe

Torque wrench

Indoor unit pipe
(Body side)

Tighten with 2 wrenches.

Holding wrench

Flare nut

Flare nut [mm (in.)] Tightening torque [N·m (kgf·cm)]

6.35 (1/4) dia. 16 to 18 (160 to 180)

9.52 (3/8) dia. 32 to 42 (320 to 420)

12.70 (1/2) dia. 49 to 61 (490 to 610)

15.88 (5/8) dia. 63 to 75 (630 to 750)

19.05 (3/4) dia. 90 to 110 (900 to 1,100)

]

1

4.4. Installing heat insulation

CAUTION

• 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.

After checking for gas leaks, insulate by wrapping insulation
around the 2 parts (Gas and Liquid) of the indoor unit
coupling, using the coupler heat insulation.
After installing the coupler heat insulation, wrap both ends
with vinyl tape so that there is no gap.
Secure both ends of the heat insulation material using Binder.
And fi nally fi x connection pipe (Liquid) to connection pipe (Gas)
by rolling vinyl tape over coupler heat insulation (Gas) and
coupler heat insulation (Liquid).

Coupler heat
insulation

Indoor unit

No gap

Coupler heat
insulator
(Accessories)

Coupler heat
insulator
(Accessories)
Be sure to overlap
the insulation

Gas pipe Liquid pipe

No gap

En-9

Insulation (pipe)
(Accessories)

No gap

Small pipe

Silencer pipe

CAUTION

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

5. INSTALLING DRAIN HOSE

]

CAUTION

• Install the drain hose in accordance with the instructions
in this Installation Manual and keep the area warm
enough to prevent condensation. Problems with the
piping may lead to water leaks.

Use general hard polyvinyl chloride pipe and connect it with
adhesive (polyvinyl chloride) so that there is no leakage.
Always heat insulate the indoor side of the drain hose.
Use a drain pipe that matches the size of the drain hose.

• 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.

O.D.

Drain pipe 32 mm (VP25)

When using the drain port on the left side of the unit, remove
the drain cap and install it to the right side drain port.
(Only when suspended from the ceiling)

Drain cap

Unit

INSTALL THE DRAIN HOSE

Working procedure

1) Install the attached drain hose to the drain port of the

body. Install the hose band from the top of the hose within
the graphic display area. Secure fi rmly with the hose
band.

2) Use vinyl adhesive agent to glue the drain piping (PVC

pipe VP25) which is prepared on site or piping socket.
(Apply color adhesive agent evenly until the gauge line
and seal)

3) Check the drainage.

4) Install the heat insulation.

5) Use the attached heat insulation to insulate the drain port

and band parts of the body.

Top view

Drain hose
(Accessories)

10~15mm

Hose Band
(Accessories)

Soft PVC side

Ensure there is no space

Drain pan

Side view

Applying
area of
adhesive

Hard PVC side

Joint pipe
(Field supply)

Drain pipe (VP25)
(Field supply)

4 mm or less

Wrap the Drain hose insulation around the drain hose
connection.

Top view

Drain pan

Drain hose

100mm

Drain hose insulation
(Accessories)

Hose opening view

Wind the attached heat insulation
around the hose band. Make sure
the alignment is on top.

A. Floor console type

Be sure to arrange the drain hose so that it is leveled lower
than the drain hose connecting port of the indoor unit.

Drain hose

OK NO GOOD NO GOOD

Arrange the drain
hose lower than
this portion.

CAUTION

• Do not install the unit so that the drain hose side is too
high. Height A should be less than 5 mm.

Drain hose

NO GOOD NO GOOD

En-10

B. Under ceiling type

Be sure to arrange the drain hose so that it is leveled lower
than the drain hose connecting port of the indoor unit.

Drain
hose

Arrange the drain hose
lower than this portion.

OK NO GOOD

When drain hose is arranged backward.
Secure the drain hose with the VT wire.

Drain hose

VT wire
hole

VT wire

Pass the drain hose
through here.

Cut the grille

Intake grille

Base (Bottom)

6. ELECTRICAL WIRING

]

WARNING

• Electrical work must be performed in accordance with this
Manual by a person certifi ed 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 fi re.

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

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

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

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

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

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

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

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

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

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

• Always connect the ground cable.
Improper grounding work can cause electric shocks.

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

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

• Connect the connection cable fi rmly to the terminal
board. Imperfect installation may cause a fi re.

CAUTION

• 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.

• 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 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 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.

En-11

]

1

6.1. Electrical requirement

Voltage rating

230 V

Operating range

198 - 264 V

Recom-

mended cable

size (mm2)

Cable type Remark

Power

supply cable

2.5

Type245 IEC57

or equivalent

1ø 50 Hz

198 - 264 V

2 Cable + ground

Transmission

cable

0.33

LONWORKS

compatible cable

22 AWG
LEVEL 4 (NEMA)
non-polar 2 core,

twisted pair solid

core diameter

0.65 mm

Remote

controller

cable

0.33

Sheathed

PVC cable*

Polar 3 core
Twisted pair

*: Use shielded cable in accordance with local rules for
remote controller cable.

Fuse capacity (A) Breaker for leakage current

15 30 mA 0.1 sec. or less

]

1

6.2. Wiring method

(EXAMPLE)

POWER SUPPLY

OUTDOOR UNIT

BREAKER

POWER SUPPLY

TRANSMISSION

TRANSMISSION

POWER
SUPPLY

POWER
SUPPLY

REMOTE

CONTROLLER

(Primary)

REMOTE

CONTROLLER

POWER
SUPPLY

REMOTE
CONTROL

TRANSMISSION TRANSMISSION

POWER
SUPPLY

POWER
SUPPLY

REMOTE
CONTROL

REMOTE
CONTROL

INDOOR UNIT

POWER
SUPPLY

REMOTE

CONTROLLER

(Secondary)

INDOOR UNIT

INDOOR UNIT

BREAKER

BREAKER BREAKER

*Ground the remote controller if it has a ground wire.

]

1

6.3. Unit wiring

• Before attaching the cable to terminal block.

6.3.1. Power supply cable

Power supply

cable

15 mm

Earth
cable

70 mm

A. For solid core wiring

(1) To connect the electrical terminal, follow the below

diagram and connect after looping it around the end of the
cable.

(2) Use the specifi ed cables, connect them securely, and

fasten them so that there is no stress placed on the
terminals.

(3) Use an appropriate screwdriver to tighten the terminal

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

(4) Do not tighten the terminal screws too much, otherwise,

the screws may break.
(5) See the table for the terminal screw tightening torques.
(6) Please do not fi x 2 power supply cables with 1 screw.

Strip 25 mm

Loop

Screw with
special washer

Cable

Cable end (Loop)

Terminal block

Screw with
special
washer

Cable end
(Loop)

Cable

WARNING

• When using solid core cables, do not use the ring
terminal. If you use the solid core cables with the ring
terminal, the ring terminal’s pressure bonding may
malfunction and cause the cables to abnormally heat up.

En-12

6.3.2. Transmission and Remote controller cable

Transmission cable

Shielded
cable
(No fi lm)

50 mm

30 mm

Remote controller cable

30 mm

• Connect remote controller and transmission cables as shown
in Fig. B.

• When the 2 cables are attached.

Fig. B

Different
diameter

Connect to
1 side

OK

NO GOOD NO GOOD

WARNING

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

Tightening torque

M3 screw

(Transmission/X1, X2)

(Remote controller/Y1, Y2, Y3)

0.5 to 0.6 N·m
(5 to 6 kgf·cm)

CAUTION

• To peel the fi lm from the lead cable, use a dedicated tool
that will not damage the conductor cable.

• When installing a screw on the terminal block, do not cut
the cable by overtightening the screw. On the other hand,
an undertightened screw can cause faulty contact, which
will lead to a communication failure.

]

B. For strand wiring

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

fi gure below to connect to the terminal block.

(2) Securely clamp the ring terminals to the cables using an

appropriate tool so that the cables do not come loose.

(3) Use the specifi ed cables, connect them securely, and

fasten them so that there is no stress placed on the
terminals.

(4) Use an appropriate screwdriver to tighten the terminal

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

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

the screws may break.
(6) See the table for the terminal screw tightening torques.
(7) Please do not fi x 2 power supply cables with 1 screw.

Ring terminal

Sleeve

Screw with
special washer

Cable

Ring terminal

Terminal block

Screw with
special
washer

Cable

Ring
terminal

Strip 10 mm

WARNING

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

Tightening torque

M4 screw

(Power supply/L, N, GND)

1.2 to 1.8 N·m

(12 to 18 kgf·cm)

En-13

1

6.4. Connection of wiring

(1) Remove the electric component box.

Electric component box

Electric component box

RFM

CAUTION

• Do not remove the RFM fixing screws. If the stays are
removed, the electric component box will fall.

• If you use as “Floor console”, you must remove screws
and RFMs (2 position).

When removing the electric component box, remove the
clamp from the cables.
After completing the work, fasten the cables as they were
originally by installing the clamp.

Cables

Clamp

Remove the clamp.

Install the clamp.

(2) Pull out the electric component box.

Electric component box

(3) Remove the electric component box cover.

Remove the 3 tapping screws.

Electric component box cover

Base

CAUTION

• Be careful not to pinch the lead cables between the
electric component box and base.

(4) Wiring

* When there is 1 transmission cable or remote controller

cable, fasten it the same way as shown in the fi gure with a
binder (medium).

Binder (Medium)
(Accessories)

L, N: Power supply cable

Remote controller cable
Y1: Red, Y2: White, Y3: Black

X1, X2: Transmission cable

]

1

6.5. External input and external output

(Optional parts)

Controller PCB

Input No Voltage terminal (CN17)

Input Voltage terminal (CN6)

Output terminal (CN16)

GND

En-14

(1) External input terminals

• Indoor unit can be Start/Stop or Emergency stop, Forced
stop by using indoor unit PCB CN6 or CN17.

Wiring methods and specifi cations

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

* Use an external input and output cable with appropriate

external dimension, depending on the number of cables to
be installed.

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

• Input selection

Use either one of these types of terminal according to the
application. (Both types of terminals cannot be used
simultaneously.)

• Voltage terminal ([CN6])

When a power supply must be provided at the input device
you want to connect, use the voltage terminal ([CN6]).

1

2

3

+

+

-

-

-

Input device 1Input device 2

Load
resistance

Load
resistance

*1

DC power supply
12 - 24V

connected unit

*a

*a

P.C .B

CN6

*b

*1 Make the power supply DC12 to 24V. Select a power supply
capacity with an ample surplus for the connected load.
Do not impress a voltage exceeding 24V across pins 1-2, and
1-3.
*a The allowable current is DC5~10mA. (Recommended:
DC5mA)
Provide a load resistance such that the current becomes
DC10mA or less.
Select very low current use contacts (usable at DC12V,
DC1mA or less).
*b The polarity is [+] for pin 1 and [-] for pin 2 and 3.
Connect correctly.

When connected to voltage terminals of multiple indoor units
with a connected unit, be sure to make a branch outside the
indoor unit using a pull box, etc. as shown on below example.

DC power
supply 12-24V

connected unit

Load
resistance

P.C .B

P.C .B

CN6

CN6

CN6

P.C .B

Input device 1Input device 2

Indoor unitIndoor unitIndoor unit

Load
resistance

• No voltage terminal ([CN17])
When a power supply is unnecessary at the input device you
want to connect, use the no voltage terminal ([CN17]).

1

2

3

P.C .B

GND

Ch 1

*c

*c

*d

Ch 2

CN17

connected unit

*c Select very low current use contacts (usable at DC12V,
DC1mA or less).
*d The wiring is different from voltage terminals. Be suffi ciently
careful when wiring.
When connected to no voltage terminals of multiple indoor
units with a connected unit, insulate each indoor unit with
relay, etc. as shown on below example.
When connected to multiple indoor units directly, it will cause
breakdown.

Power supply for relay

Indoor unit Indoor unit Indoor unit

Input device 2

Input device 1

K1~ K6: Re lay

P.C .B

K1

P.C .B

P.C .B

CN17

CN17

CN17

K2

K3

K4

K5

K6

Operation behavior

• Input signal type
The input signal type can be selected.

Pulse

Edge

The width of pulse
must be longer than
200msec.

It is switched by Dip-sw on the indoor
unit PCB.

Dip-sw [Set 2-2] Input signal type

OFF Edge

ON Pulse

• When function setting is “Start/Stop” mode
In the case of “Edge” input

Connector Input signal Command

Ch1 of

CN6 or CN17

OFF → ON Operation

ON → OFF Stop

In the case of “Pulse” input

Connector Input signal Command

CN6 or CN17

Ch1 OFF → ON Operation

Ch2 OFF → ON Stop

(Device for DC Current)

En-15

* The last command has priority.
* The indoor units within the same remote controller group

operates in the same mode.

• When function setting is “Emergency stop” mode

In the case of “Edge” input

Connector Input signal Command

Ch1 of

CN6 or CN17

OFF → ON Emergency stop

ON → OFF Normal

In the case of “Pulse” input

Connector Input signal Command

CN6 or CN17

Ch1 OFF → ON

Emergency

stop

Ch2 OFF → ON Normal

* All indoor units of same refrigerant system stops when

Emergency stop operates.

• When function setting is “Forced stop” mode

In the case of “Edge” input

Connector Input signal Command

Ch1 of

CN6 or CN17

OFF → ON Forced stop

ON → OFF Normal

In the case of “Pulse” input

Connector Input signal Command

CN6 or CN17

Ch1 OFF → ON Forced stop

Ch2 OFF → ON Normal

* When the forced stop is triggered, indoor unit stops and

Start/Stop operation by a remote controller is restricted.

* When forced stop function is used with forming a

remote controller group, connect the same equipment
to each indoor unit within the group.

• Selection method of functions

“Start/Stop” mode or “Emergency stop” mode, “Forced stop”
mode can be selected with function setting of indoor unit.

(2) External output terminals

• When picking up output signals for operating status,
abnormal conditions or indoor unit status.

Wiring methods and specifi cations

1

2

3

4

P.C .B

CN16

*4

+

+

-

-

-

-

DC power supply
12 - 24V *2

Connected load

*3

connected unit

Connected load

*3

Connected load

*3

*2 Provide a DC12 to 24V power supply. Select a power
supply capacity with an ample surplus for the connected
load.
*3 The allowable current is 30mA or less. Provide a load
resistance such that the current becomes 30mA or less.
*4

Polarity is [+] for pin 1 and [-] for pins 2-4. Connect correctly.
Do not impress a voltage exceeding 24V across pins 1-2, 1-3,
and 1-4.

Operation behavior

Connector Output voltage Status

CN16

External

output1

Pins 1-2

0V Stop

DC 12-24 V *2 Operation

External

output2

Pins 1-3

0V Normal

DC 12-24 V *2 Error

External

output3

Pins 1-4

0V Indoor unit fan stop

DC 12-24 V *2

Indoor unit fan

operation

A twisted pair cable (22AWG) should be used. Maximum
length of cable is 150 m.
* Use an external input and output cable with appropriate

external dimension, depending on the number of cables to
be installed.

En-16

(3) Connection methods

• Wire modifi cation
Use a tool to cut off the terminal on the end of the wire, and
then remove the insulation from the cut end of the wire.
Connect the wire with connecting wire with solder.

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

Option parts
External input /output wire

Insulated connection

Field supply

Input Voltage terminal
(CN6)

Controller PCB

Input No Voltage terminal (CN17)

Output terminal (CN16)

Binder

Switch PCB

Controller PCB

Power supply PCB

Terminal PCB

7. FIELD SETTING

There are 3 methods for address setting by FIELD SETTING
as follows.
Set by either of the methods.
Each setting method is described (1) to (3) below.

(1)

IU AD, REF AD SW settings

....This section (7.1. Setting

the address)

(2) Remote controller settings .... Refer to the wired or

wireless remote controller
manual for detailed setting
information. (Set IU AD,
REF AD SW to 0)

(3) Automatic address settings ... Refer to the outdoor unit

manual for detailed setting
information. (Set IU AD,
REF AD SW to 0)

]1

7.1. Setting the address

Manual address setting method

• The indoor unit address and the refrigerant circuit address

can also be set up through the wireless remote controller.

CAUTION

• Be sure to turn OFF the power before performing the
fi eld setting.

• Set it according to the following procedures when setting
manually.

It can be set manually if the cover (small) is removed under
the condition that the electric component box cover is

attached.

Cover (small)

Electric component box

Rotary switch
Example: “0”

Rotary switch
Example: “0”

En-17

CAUTION

• Use an insulated screwdriver to set the dip switches.

Setting

Setting

range

Type of switch

Indoor unit

address

0–63

Setting

example

2

IU AD x 10 IU AD x 1

Refrigerant

circuit

address

0–99

Setting

example

63

REF AD x 10 REF AD x 1

(1) Indoor unit address

Rotary switch (IU AD × 1) .........Factory setting “0”

Rotary switch (IU AD × 10) .......Factory setting “0”

When connecting multiple indoor units to 1 refrigerant sys-

tem, set the address at IU AD SW as shown in the Table A.

(2) Refrigerant circuit address

Rotary switch (REF AD × 1) .....Factory setting “0”

Rotary switch (REF AD × 10) ...Factory setting “0”
In the case of multiple refrigerant systems, set REF AD

SW as shown in the Table A for each refrigerant
system.

Set to the same refrigerant circuit address as the outdoor

unit.

Table A

Address

Rotary

Switch Setting

Address

Rotary

Switch Setting

Refrigerant

circuit

REF AD SW

Indoor unit

IU AD SW

×

10

×

1

×

10

×

1

000000
101101
202202
303303
404404
505505
606606
707707
808808

909909
10 1 0 10 1 0
11 1 1 11 1 1
12 1 2 12 1 2

.
.
.

.
.
.

.
.
.

.
.
.

.
.
.

.
.
.

99 9 9 63 6 3

Do no

t set the indoor unit address (IU AD SW) at 64 to 99. It

may result

failure.

(3) Remote controller address

Rotary switch (RC AD SW)....Factory setting “0”

When connecting multiple indoor units to 1 standard wired

remote controller, set the address at RC AD SW in
sequence from 0.

Setting

Setting

range

Type of switch

Remote con-

troller

address

0–15

Setting

example

0

RC AD

Example If 4 indoor units are connected.

Remote
controller

Indoor unit

Indoor unit

Indoor unitIndoor unit

RC AD SW0RC AD SW1RC AD SW2RC AD SW

3

RC AD SW

01234567

Address 01234567

RC AD SW

89ABCDEF

Address 8 9 10 11 12 13 14 15

]1

7.2. Custom code setting

Selecting the custom code prevents the indoor unit mix-up.
(Fig. B)
(Up to 4 codes can be set.)
Perform the setting for both the indoor unit and the remote
controller.

Fig. B

Code change

Indoor unit

Remote
controller

Confusion

A B C D

A B C D

• Custom code setting for indoor unit

Set the DIP SW SET 3 SW1, SW2, referring to the Table B.

sw1sw2sw3sw

4

Dip switch

“SET 3”

ON

OFF

Table B

Custom code

A (Factory setting) B C D

DIP SW

SET 3 SW1

OFF ON OFF ON

DIP SW

SET 3 SW2

OFF OFF ON ON

En-18

]1

7.3. Function setting

• 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. (Set IU AD, REF AD SW to 0)

• Refer to “7.1. Setting the address” for indoor unit address
and refrigerant circuit address settings.

•

Turn the power of the indoor unit ON before starting the setting.

* Turning on the power indoor units initializes EEV, so make

sure the piping air tight test and vacuuming have been
conducted before turning on the power.

* Also check again to make sure no wiring mistakes were

made before turning on the power.

Function details

Function

Function

number

Setting

number

Default Details

Filter

indicator

interval

11

00 Default

○

Adjust the fi lter cleaning interval
notifi cation. If the notifi cation is
too early, change to setting 01. If
the notifi cation is too late, change
to setting 02.

01 Longer

02 Shorter

Filter

indicator

action

13

00 Enable

○

Enable or disable the fi lter
indicator. Setting 02 is for use
with a central remote controller.

01 Disable

02

Display
only on

central
remote

controller

Horizon-

tal swing

airfl ow

direction

24

00 Default

○

Adjust the horizontal swing airfl ow
direction.
(For horizontal swing equipped
models)

01 Left half

02 Right half

Cool air

tem-

perature

trigger

30

00 Default

○

Adjust the cool air trigger
temperature. To lower the trigger
temperature, use setting 01. To
raise the trigger temperature, use
setting 02.

01 Adjust (1)

02 Adjust (2)

Hot air

tem-

perature

trigger

31

00 Default

○

Adjust the hot air trigger
temperature. To lower the trigger
temperature by 6 degrees C, use
setting 01. To lower the trigger
temperature by 4 degrees C, use
setting 02. To raise the trigger
temperature, use setting 03.

01 Adjust (1)

02 Adjust (2)

03 Adjust (3)

Auto

restart

40

00 Enable

Enable or disable automatic
system restart after a power outage.
*

Auto restart is an emergency func­tion such as for power failure etc.
Do not start and stop the indoor
unit by this function in normal
operation.
Be sure to operate by the control
unit, converter or external input
device.

01 Disable

○

External

control

46

00 Start/Stop

○

Allow an external controller to
start or stop the system, or to
perform an emergency stop.
* If an emergency stop is

performed from an external
controller, all refrigerant systems
will be disabled.

*

If forced stop is set, indoor unit
stops

by the input to the external
input terminals, and Start/Stop by
a remot

e controller is restricted.

01

Emergency

stop

02

Forced

stop

Error
report
target

47

00 All

○

Change the target for reporting
errors. Errors can either be
reported in all locations, or only
on the central remote controller.

01

Display only

on central

remote controller

7.3.1. Button name and function

OPERATION indicator lamp (Green)
TIMER indicator lamp (Orange)
FILTER indicator lamp (Red)

MANUAL AUTO button

7.3.2. Checking the function settings

• Press and hold the “MANUAL AUTO” button on the indoor
unit for 3 seconds to check the function settings. It is
necessary to disconnect the power in order to return to
normal operation mode.

(1) Indoor unit and refrigerant address indication

Indication pattern

Indicator name

Indication pattern

Indoor unit

address

Refrigerant address

OPERATION
indicator lamp (Green)

ON

Flash
(1.0s ON/1.0s OFF)

TIMER indicator lamp
(Orange)

Address: tens place (0.5s ON/0.5s OFF)

FILTER indicator lamp
(Red)

Address: ones place (0.5s ON/0.5s OFF)

• Indoor unit address example

(Example) ADDRESS : 24

OPERATION
indicator lamp
(Green)

TIMER
indicator lamp
(Orange)

FILTER
indicator lamp
(Red)

10 sec

1 cycle 12 sec

8 sec

ON

OFF

0.5s

0.5s 0.5s 0.5s

0.5s

0.5s

0.5s 0.5s

0.5s

0.5s

0.5s 0.5s

ON

OFF
ON

OFF

ON

En-19

• Refrigerant address example

(Example) ADDRESS : 30

OPERATION
indicator lamp
(Green)

TIMER
indicator lamp
(Orange)

FILTER
indicator lamp
(Red)

9 sec

1 cycle 12 sec

ON

OFF

1.0s 1.0s 1.0s

1.0s 1.0s 1.0s 1.0s

0.5s

0.5s

0.5s 0.5s 0.5s 0.5s

ON

OFF
ON

OFF

OFF

• Setting details

Function

number

Item Setting number

01 Indoor unit address 00~63

02 Refrigeration address 00~99

For use with a remote controller, set all rotary switches to 0,
and refer to “7.1. Setting the address” for details.
All switches are set to 0 at the factory.

(2) Others

Indication pattern

Indicator Name Indication pattern

OPERATION
indicator lamp (Green)

Function number; tens place
(0.5s ON/0.5s OFF)

TIMER
indicator lamp (Orange)

Function number; ones place (0.5s
ON/0.5s OFF)

FILTER
indicator lamp (Red)

Setting number: (0 - 9) (0.5s ON/0.5s
OFF)

(Example) Function : 31, Setting number : 2

OPERATION
indicator lamp
(Green)

TIMER
indicator lamp
(Orange)

FILTER
indicator lamp
(Red)

11 sec

10 sec

9 sec

1 cycle 12 sec

ON

OFF

0.5s

0.5s

0.5s

0.5s

0.5s

0.5s

0.5s

0.5s

0.5s

0.5s 0.5s 0.5s

ON

OFF
ON

OFF

8. MOUNT THE COVER PLATE AND

THE INTAKE GRILLE

]

1

8.1. Handling for the pipe take-off part

When the pipe is pulled out in the direction shown in the fi gure
below, cover the take-off part with material (putty or the like)
that will block it off.

UNDER CEILING TYPE

To p

Right

Rear

FLOOR CONSOLE TYPE

]

1

8.2. Mount the cover plate (Right)

(1) Cut a pipe exit hole in the right plate. This is only when

the pipe exits from the right side. (This operation is not
required when the protrusion is on the top or rear.)

Cover plate (Right) (Accessories)

En-20

(2) Join the cover plates (right) and mount with screws.

Tapping screw (ø4 × 10)
(Accessories)

]

1

8.3. Mount the cover plate (Left)

(1) Join the cover plates (left) and mount with screws.

Tapping screw (ø4 × 10)
(Accessories)

Cover plate (Left)
(Accessories)

8.4. Mount the intake grille

(1) Cut the right side of the intake grille. This is only when the

pipe exits from the right side.

(2) Insert the hinges on the bottom of the intake grille into the

holes in the base assembly. Then mount the arms to the
3 areas on the top of the intake grille.

9. TEST OPERATION

]

1

9.1. Test operation using PCB (Outdoor
unit)

• Refer to the Installation Manual for the outdoor unit if the
PCB for the outdoor unit is to be used for the test operation.

]

1

9.2. Test operation using remote controller

• Refer to the Installation Manual for the remote controller to
perform the test operation using the remote controller.

• When the air conditioner is being test run, the OPERATION
and TIMER indicator lamps fl ash slowly at the same time.

10. CHECK LIST

]1

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

If not performed

correctly

Check

box

Has the indoor unit
been installed correctly?

Vibration, noise,
indoor unit may drop

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

No cooling, No heating

Has heat insulation
work been completed?

Water leakage

Does water drain easily
from the indoor units?

Water leakage

Is the voltage of the
power source the same
as that indicated on the
label on the indoor unit?

No operation, heat
or burn damage

Are the wires and
pipes all connected
completely?

No operation, heat
or burn damage

Is the indoor unit
grounded?

Short circuit

Is the connection cable
the specifi ed thickness?

No operation, heat
or burn damage

Are the inlets and outlets
free of any obstacles?

No cooling, No heating

Does start and stop air
conditioner operation
by remote controller
or external device?

No operation

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

En-21

11. ERROR CODES

1

If you use a wired type remote controller, error codes will
appear on the remote controller display. If you use a wireless
remote controller, the lamp on the photodetector unit will
output error codes by way of blinking patterns. See the lamp
blinking patterns and error codes in the table below.

Error display

Wired

Remote

Controller

Error CODE

Error contents

OPERATIOR

indicator

lamp

(green)

TIMER

indicator

lamp

(orange)

FILTER

indicator

lamp
(red)

(1) (2)

Remote
controller
communication
error

(1) (4)

Anomalous
network
communications

(1) (6)

Parallel
communication
error

(3) (1)

Power
frequency error

(3) (2)

Model
information
error/EEPROM
accession error

(4) (1)

Room
temperature
thermistor error

(4) (2)

Indoor heat
exchanger
temperature
thermistor error

(5) (1)

Indoor fan
motor error

(5) (3) Drainage error

(9) (15)

Outdoor unit
error

Display mode

: 0.5s ON / 0.5s OFF
: 0.1s ON / 0.1s OFF
( ) : Number of fl ashing

Wired Remote Controller Display

Error code