Page 1
AIR CONDITIONER
INDOOR UNIT
Cassette type
PART NO. 9379124003-02
INSTALLATION MANUAL
For authorized service personnel only.
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. Decoration panel accessories .............................3
2.5. 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 .................................. 5
4.2. Pipe requirement ................................................. 6
4.3. Flare connection (pipe connection) .....................6
4.4. Installing heat insulation ...................................... 7
5. INSTALLING DRAIN PIPES ......................................... 7
6. ELECTRICAL WIRING
6.1. Electrical requirement .......................................... 8
6.2. Wiring method ..................................................... 9
7. REMOTE CONTROLLER SETTING
7.1. Load batteries (R03/LR03 × 2) .......................... 10
7.2. Installing the Remote control unit holder ........... 11
8. DECORATION PANEL INSTALLATION
8.1. Remove the intake grille .................................... 11
8.2. Installing the panel to indoor unit ....................... 12
8.3. Attaching the intake grille...................................12
9. FUNCTION SETTING
9.1. Operation method .............................................. 13
9.2. Function setting ................................................. 14
9.3. Selecting the remote control unit signal code .... 15
9.4. Special installation methods .............................. 16
10. TEST RUN .................................................................. 18
11. CHECK LIST ............................................................... 19
12. ERROR CODES ......................................................... 19
13. CUSTOMER GUIDANCE ........................................... 20
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1. SAFETY PRECAUTIONS
Be sure to read this Manual thoroughly before installation.•
The warnings and precautions indicated in this Manual con-•
tain 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 in-•
stall the indoor unit in accordance with this Installation
Manual. An improperly installed unit can cause serious
accidents such as water leakage, electric shock, or fi re. 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, ven-•
tilate 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.
CAUTION
This mark indicates procedures which,
if improperly performed, might possibly
result in personal harm to the user, or
damage to property.
2.2. Special tool for R410A
WARNING
To install a unit that uses R410A refrigerant, use dedicat-•
ed tools and piping materials that have been manufactured specifi cally for R410A use. Because the pressure
of R410A refrigerant is approximately 1.6 times higher
than the R22, failure to use dedicated piping material or
improper installation can cause rupture or injury.
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 backfl ow 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.
2. ABOUT THE UNIT
2.1. Precautions for using R410A
refrigerant
WARNING
Do not introduce any substance other than the pre-•
scribed refrigerant into the refrigeration cycle. If air enters
the refrigeration cycle, the pressure in the refrigeration
cycle will become abnormally high and cause the piping
to rupture.
If there is a refrigerant leak, make sure that it does •
not exceed the concentration limit. If a refrigerant leak
exceeds the concentration limit, it can lead to accidents
such as oxygen starvation.
Do not touch refrigerant that has leaked from the refriger-•
ant 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.
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2.4. Decoration panel accessories
Name and Shape Q’ty Description
Connector cover
1
For covering connector
Screw
4
For mounting decoration
panel
Screw
1
For mounting connector
cover
2.5. Optional parts
Exterior
Parts name
Model No. Summary
Wired
remote
controller
UTB-*UD
Unit control is performed by wired
remote controller
Air outlet
shutter
plate
UTR-YDZB
Install the plate at
outlet when carrying
out 3-way direction
operation
Wired remote controller is recommended using simultaneous
twin or triple connection.
2.3. Accessories
WARNING
For installation purposes, be sure to use the parts sup-•
plied 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 fi re.
The following installation parts are furnished. Use them as •
required.
Keep the Installation Manual in a safe place and do not dis-•
card any other accessories until the installation work has
been completed.
Name and Shape Q’ty Description
Coupler heat
insulation (Large)
1
For indoor side pipe joint
(gas pipe)
Coupler heat
insulation (Small)
1
For indoor side pipe joint
(liquid pipe)
Special nut A
(Large fl ange)
4
For installing the indoor unit
Special nut B
(Small fl ange)
4
For installing the indoor unit
Template
(Carton top)
1
For
positioning the indoor
unit
Remote
control unit
1
For air conditioner
operation
Battery
2
For remote controller unit
Remote control
unit holder
1
For installing the remote
controller unit
Screw
2
For mounting the remote
control unit holder
Binder
2
For electrical wiring
Wire clamper
1
For electrical wiring
(*1) This part is not furnished for AUT* series
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3.2. Installation dimension
The ceiling rear height as shown in the fi gure.•
Obstruction
1,800
or more
1,000
or more
1,000
or more
Floor
Strong and durable ceiling
262
or more
Unit : mm
This product can be installed at a height of up to 3.0 m. •
Perform the Function Setting on the remote control in
accordance with the installed height. (See 9. FUNCTION
SETTING)
Discharge direction setting
The discharge direction can be selected as shown below.•
100 or more*
(4 directions)
(3 directions)
Unit : mm
* Please
ensure
sufficient
maintenance
space during
installation.
For a 3-way outlet, make sure to perform the Function •
Setting on the remote control. Also, make sure to use the
optional shutter plate to block the outlet.
The ceiling height cannot be set in the 3-way outlet mode. •
Therefore, do not change the setting in the setting the ceiling height. (See 9. FUNCTION SETTING)
When the outlet is shut, be sure to install the optional Air •
outlet shutter plate kit.
For the details of installation, please refer to Installation
Manual of kit.
3.3. Installation the unit
WARNING
Install the air conditioner in a location which can with-•
stand a load of at least fi ve 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. 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.
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
infl ammables 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 ammo-•
nia may be generated.
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 indoor unit, outdoor unit, power supply cable, •
transmission cable, and remote control cable at least 1
m away from a television or radio receivers. The purpose
of this is to prevent TV reception interference or radio
noise. (Even if they are installed more than 1 m apart,
you could still receive noise under some signal conditions.)
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 a place having a suffi cient (1)
strength so that it withstands against the weight of the
indoor unit.
The inlet and outlet ports should not be obstructed; the air (2)
should be able to blow all over the room.
Leave the space required to service the air conditioner.(3)
A place from where the air can be distributed evenly (4)
throughout the room by the unit.
Install the unit where connection to the outdoor unit is (5)
easy.
Install the unit where the connection pipe can be easily (6)
installed.
Install the unit where the drain pipe can be easily installed.(7)
Install the unit where noise and vibrations are not ampli-(8)
fi ed.
Take servicing, etc., into consideration and leave the spac-(9)
es. Also install the unit where the fi lter can be removed.
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3.3.1. Position the ceiling hole and hanging bolts
Ceiling openings and hanging bolt installation diagram.
WARNING
When fastening the hangers, make the bolt positions •
uniform.
530 (Hanging bolt position)
540 (Hanging bolt position)
570(Indoor unit)
580 – 660 (Ceiling openings)
700 (Decoration Panel)
135 250
75
Drain pipe (O.D.ø25.4)
Min.450
40 99102
114
215
30
262
30
58
123
Ceiling
Control box
Liquid pipe
Gas pipe
Unit : mm
150~200
Min.450
Maintenance
space
Be sure to keep suffi cient space in the designated position •
for future maintenance.
3.3.2. Body installation
Install special nut A, then special nut B onto the hanging (1)
bolt.
Raise the body and mount its hooks onto the hanging bolt (2)
between the special nuts.
Turn special nut B to adjust the height of the body.(3)
WARNING
Perform fi nal tightening by tightening the double nut •
fi rmly.
Be sure to install the body horizontally and adjust the •
height below the body and the ceiling surface properly.
Special nut B
Hook
Hanging bolt
30
or more
After installing the
body, tighten the nuts.
19
Ceiling
Special nut A
Unit : mm
3.3.3. Leveling
Using a level, or vinyl hose fi lled with water, fi ne adjust so that
the body is level.
Vinyl hose
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.
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, de-•
formed, 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.
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
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Pipe outside
diameter [mm (in.)]
Width across fl ats
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
If pipes are shaped by hand, be careful not to collapse them.•
Do not bend the pipes at 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 three times.•
CAUTION
To prevent breaking of the pipe, avoid sharp bends. •
If the pipe is bent repeatedly at the same place, it will •
break.
4.3.3. Pipe connection
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 fl are nut cannot be tightened smoothly. If the
fl are 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 fl ared part. Prevent mineral •
oil from getting into the system as this would reduce the
lifetime of the units.
Detach the caps and plugs from the pipes.(1)
Center the pipe against the port on the indoor unit, and (2)
then turn the fl are nut by hand.
Indoor unit
Connection pipe
(Liquid)
Connection pipe
(Gas)
When the fl are nut is tightened properly by your hand, (3)
hold the body side coupling with a separate spanner, then
tighten with a torque wrench. (See the table below for the
fl are nut tightening torques.
CAUTION
Hold the torque wrench at its grip, keeping it in the right •
angle with the pipe, in order to tighten the fl are nut cor-
rectly.
Tighten the fl are nuts with a torque wrench using the •
specifi ed tightening method. Otherwise, the fl are 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.
4.2. Pipe requirement
CAUTION
Refer to the Installation Manual of the outdoor unit for •
description of the length and the diameter 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
0.045W/(m·K) or less (at 20 °C).
4.3. Flare connection (pipe connection)
4.3.1. Flaring
Use special pipe cutter and fl are tool exclusive for R410A.•
Cut the connection pipe to the necessary length with a (1)
pipe cutter.
Hold the pipe downward so that cuttings will not enter the (2)
pipe and remove any burrs.
Insert the fl are nut (always use the fl are nut attached to (3)
the indoor and outdoor units respectively) onto the pipe
and perform the fl are processing with a fl are tool. Leak-
age of refrigerant may result if other fl are nuts are used.
Protect the pipes by pinching them or with tape to prevent (4)
dust, dirt, or water from entering the pipes.
B
Die
A
Pipe
Check if [L] is flared uniformly
and is not cracked or scratched.
L
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 meas-
ure the dimension A.
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Connection pipe
Torq
ue wr
e
I
ndoor unit pi
pe
(
Body side
)
t
wrenc
h
th two wrenches.
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)
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 two 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.
Body
Be sure to overlap the
insulation
Coupler heat insulation
No gap
Coupler heat
insulation
5. INSTALLING DRAIN PIPES
Note
Install the drain pipe.
Install the drain pipe with downward gradient (1/50 to 1/100) •
and so there are no rises or traps in the pipe.
Use general hard polyvinyl chloride pipe (VP25) [outside di-•
ameter 32 mm (1-1/4”)] and connect it with adhesive (polyvinyl chloride) so that there is no leakage.
When the pipe is long, install supporters.•
Do not perform air bleeding.•
Always heat insulate the indoor side of the drain pipe.•
When desiring a high drain pipe height, raise it up to 700 mm •
or less from the ceiling within a range of 150 mm from the
body. A rise dimension over this range will cause leakage.
Max. 700 mm
Trap
Support
1.5 to 2.0 m
150 mm or less
Rise
Trap
Air bleeding
150 mm or les
[Prohibitions]
NG
NG
NG
WARNING
Do not insert the drain piping into the sewer where sulfur-•
ous 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 fi nal 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.)
CAUTION
Must fi t tightly against body without any gap.•
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6.1. Electrical requirement
Power supply cable
Transmission cable
Earth cable
Conductor size
(mm
2
)
1.5 1.5(MIN.)
Conductor size
(mm
2
)
Max length
(m)
Bus wire 0.3(MIN.)
500
*
*This length shall be the total extended length in the system
of the group.
Use conformed cable with Type 245 IEC57. (Power supply •
cable or transmission cable)
Perform all electrical work according to the standard.•
Install circuit breakers, which have the terminal spacing of •
more than 3 mm, in a place of near the indoor unit and outdoor unit.
Wiring size must comply with the applicable local and na-•
tional code.
CAUTION
Be sure to execute the electrical work according to the •
Laws of each country and the Installation Instructions.
In addition, be sure to set as exclusive line and use the
rated voltage and circuit breaker.
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 insuffi cient power supply circuit or improperly per-
formed electrical work can cause serious accidents such
as electric shock or fi re.
Before starting work, check that power is not being sup-•
plied to the indoor unit and outdoor unit.
Use the included transmission cables and power cables •
or ones specifi ed by the manufacturer. Improper connec-
tions, insuffi cient insulation, or exceeding the allowable
current can cause electric shock or fi re.
For wiring, use the prescribed type of wires, connect •
them securely, making sure that there are no external
forces of the wires applied to the terminal connections.
Improperly connected or secured wires 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 block 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 •
blocks. 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.
Install a ground leakage breaker. •
If a ground leakage breaker is not installed, it may cause
electric shock or fi re.
Always connect the ground wire.•
Improper grounding work can cause electric shocks.
Install the remote controller cable and bus wire so as not •
to be direct touched with your hand.
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6.2. Wiring method
6.2.1. Connection diagrams
(Standard pair)
Indoor unit
B
W
R
3
2
1
3
2
1
3
2
1
Outdoor unit
Wired remote
controller
Black
White
Red
*
Power supply cable
Transmission cable
Remote controller cable
*Ground the remote controller if it has a ground wire.•
Wired remote controller is recommended using simultaneous
twin or triple connection.
(Simultaneous twin)
Indoor unit
(Master)
Indoor unit
(Slave)
B
W
R
3
2
1
3
2
1
3
2
1
Outdoor unit
Wired remote
controller
3
2
1
3
2
1
Black
White
Red
*
Power supply
cable
Bus wire
(Local purchase)
Transmission cable
Remote controller
cable
(Simultaneous triple)
Indoor unit
(Master)
Indoor unit
(Slave)
B
W
R
3
2
1
3
2
1
3
2
1
Outdoor unit
Wired remote
controller
3
2
1
3
2
1
Indoor unit
(Slave)
3
2
1
3
2
1
Black
White
Red
*
Power supply
cable
Bus wire
(Local purchase)
Transmission
cable
Remote controller
cable
Connect the remote controller wires to the master unit.•
*Ground the remote controller if it has a ground wire.•
6.2.2. Connection cable preparation
Keep the earth wire longer than the other wires.•
Power supply cable o
r
Transmission cable
40 mm or more
Earth wir
e
How to connect wiring to the terminals.
(For strand wiring)
Use crimp-type terminals with insulating sleeves as shown (1)
in the fi gure below to connect to the terminal block.
Securely crimp the crimp-type terminals to the wires using (2)
an appropriate tool so that the wires do not come loose.
Sleeve
Crimp-type terminal
Use the specifi ed wires, connect them securely, and fasten (3)
them so that there is no stress placed on the terminals.
Use an appropriate screwdriver to tighten the terminal (4)
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.
Do not tighten the terminal screws too much, otherwise, (5)
the screws may break.
See the table below for the terminal screw tightening (6)
torques.
WARNING
Use crimp-type terminals and tighten the terminal screws •
to the specifi ed torques, otherwise, abnormal overheat-
ing may be produced and possibly cause heavy damage
inside the unit.
Tightening torque [N·m (kgf·cm)]
M4 screw 1.2 to 1.8 (12 to 18)
M5 screw 2.0 to 3.0 (20 to 30)
Wire
Screw with
special washer
Crimp-type terminal
Terminal blocks
Wire
Screw with
special washe
r
Crimp-type
terminal
Page 10
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7. REMOTE CONTROLLER SETTING
Refer to the installation manual enclosed with the remote control unit when the wired remote control unit (option ) is used.
7.1. Load batteries (R03/LR03 × 2)
Press and slide the battery compartment lid on the reverse (1)
side to open it. Slide in the direction of the arrow while
pressing the mark.
Insert batteries. (2)
Be sure to align the battery polarities (＋ −) correctly.
Close the battery compartment lid.(3)
CAUTION
Take care to prevent infants from accidentally swallowing •
batteries.
When not using the Remote Control Unit for an extended •
period, remove the batteries to avoid possible leakage
and damage to the unit.
If leaking battery fl uid comes in contact with your skin, •
eyes, or mouth, immediately wash with copious amounts
of water, and consult your physician.
Dead batteries should be removed immediately and dis-•
posed of properly, either in a battery collection receptacle
or to the appropriate authority.
Do not attempt to recharge dry batteries.•
NOTE：
Never mix new and used batteries, or batteries of different •
types.
Batteries should last about one year under normal use. If the •
Remote Control Unit’s operating range becomes appreciably
reduced, replace the batteries and press the RESET button
with the tip of a ballpoint pen or other small object.
6.2.3. Wiring procedure
Remove the control box cover and install each connection (1)
wire.
Screw
Control box cove
r
After wiring is complete, secure the remote controller (2)
cable and transmission cable with the attached the binder
and the clamper.
Transmission cable
Wired remote controller
cable (option)
Wire clamper(accessory)
Bind securely
(a)
Detail(a)
Binder(accessory)
Cut of the excess
Transmission
cable
Wired remote
controller cable
(option)
Thread the binder through
the hole and tighten securely
Binder(accessory)
Cut of the excess
Wire clamper
(accessory)
Bind securely
Thread the binder
through the hole and
tighten securely
Install control box cover.(3)
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.
Page 11
En-11
7.2.
Installing the
remote control unit holder
CAUTION
Check that the indoor unit correctly receives the signal •
from the remote control unit, then install the remote
control unit holder.
Select the remote control unit holder selection site by •
paying careful attention to the following: Avoid places in
direct sunlight. Select a place that will not be affected by
the heat from a stove, etc.
Install the remote control unit with a distance of 7 m be-•
tween the remote control unit and the photocell as the
criteria. However, when installing the remote control unit,
check that it operates positively.
Install the remote control unit holder to a wall, pillar, etc., •
with the tapping screw.
Mount the holder.(1)
Screws
Set the remote control unit.(2)
Insert
Press in
To remove the remote control unit (when use at hand).(3)
Slide up
Pull out
8. DECORATION PANEL INSTALLATION
Installation according to the Installation instruction sheet •
Decoration panel.
Be sure to confi rm there is no gap between the panel and •
main unit after installing the Decoration panel.
8.1. Remove the intake grille
Slide the 2 grille hook.(1)
Grille hook
Open the intake grille and remove.(2)
Page 12
En-12
Connect the connector.(2)
Wire (louver): WHITE
Wire (display): WHITE
Wire (louver): RED
Indoor unit side
Arrange the wires as illustrated below.•
Attach the connector cover.(3)
Screw Connector cove
r
8.3. Attach the intake grille
The installation is the reverse of “REMOVING THE INTAKE
GRILLE”.
The intake grille can be rotated and installed 4 ways to suit
the user’s preference.
CAUTION
The louver angle cannot be changed if the power is not •
on. (If moved by hand, it may be damaged.)
The grille assembly is directionally relative to the air •
conditioner body.
Install so that there is no gap between the grille assem-•
bly and the air conditioner body.
The decoration panel equips with an accessory to •
prevent the grill completely open. Be sure to read the
INSTALLATION SHEET included with the decoration
panel before installation.
8.2. Installing the panel to indoor unit
Install the decoration panel on the indoor unit.(1)
“DRAIN” mark “PIPE” mark
Align the stamped marks on the decoration panel against •
the pipe and the drain of the indoor unit.
Screw
CAUTION
Use only the supplied screws to install the decoration •
panel.
Indoor unit
Ceiling
No gap between ceiling and
decoration panel around entire
periphery
5 ~ 7
Decoration panel
Sealant
Page 13
En-13
The remote control unit resets to signal code A when the
batteries in the remote control unit are replaced. If you use a
signal code other than signal code A, reset the signal code
after replacing the batteries.
If you do not know the air conditioner signal code setting,
try each of the signal codes ( ) until you fi nd the
code which operates the air conditioner.
STEP 2
Selecting the Function Number and Setting Value
Press the SET TEMP. ((1) ) ( ) buttons to select the function number. (Press the MODE button to switch between
the left and right digits.)
Press the FAN button to proceed to setting the value. (2)
(Press the FAN button again to return to the function
number selection.)
Press the SET TEMP. ((3) ) ( ) buttons to select the setting value. (Press the MODE button to switch between the
left and right digits.)
Press the TIMER MODE button, and START/STOP button, (4)
in the order listed to confi rm the settings.
Press the RESET button to cancel the function setting (5)
mode.
After completing the FUNCTION SETTING, be sure to turn (6)
off the power and turn it on again.
Function number
Setting valu
e
CAUTION
After turning off the power, wait 30 seconds or more •
before turning on it again. The FUNCTION SETTING
doesn’t become effective if it doesn’t do so.
9. FUNCTION SETTING
CAUTION
Confi rm whether the wiring work for outdoor unit has •
been fi nished.
Confi rm whether the cap for electric control box on the •
outdoor unit is close.
This procedure changes to the function settings used to con-•
trol the indoor unit according to the installation conditions.
Incorrect settings can cause the indoor unit malfunction.
After the power is turned on, perform the “FUNCTION •
SETTING” according to the installation conditions using the
remote controller.
The settings may be selected between the following two: •
Function Number or Setting Value.
Settings will not be changed if invalid numbers or setting •
values are selected.
Refer to the installation manual enclosed with the remote •
control unit when the wired remote control unit (option) is
used.
9.1. Operation method
While pressing the FAN button and SET TEMP. (• ) simul-
taneously, press the RESET button to enter the function
setting mode.
STEP 1
Selecting the Remote Control Unit Signal Code
Use the following steps to select the signal code of the remote
control unit.
(Note that the air conditioner cannot receive a signal code if
the air conditioner has not been set for the signal code.)
The signal codes that are set through this process are applicable only to the signals in the FUNCTION SETTING. For
details on how to set the signal codes through the normal
process, refer to SELECTING THE REMOTE CONTROL
UNIT SIGNAL CODE.
Press the SET TEMP. ((1) ) ( ) button to change the
signal code between .
Match the code on the display to the air conditioner signal
code. (initially set to ) (If the signal code does not need
to be selected, press the MODE button and proceed to
STEP 2.)
Press the TIMER MODE button and check that the indoor (2)
unit can receive signals at the displayed signal code.
Press the MODE button to accept the signal code, and (3)
proceed to STEP 2.
The air conditioner signal code is factory-set to A .
Contact your retailer to change the signal code.
Page 14
En-14
Setting Other Functions
The following settings are also possible, depending on the •
operating conditions. (The setting value is factory-set to
“00”.)
Auto Restart•
Setting Description Function Number Setting Value
Yes
40
00
No 01
Indoor Room Temperature Sensor Switching Function •
(Wired remote controller only)
Setting Description Function Number Setting Value
No
42
00
Yes 01
If setting value is “00”, room temperature is controlled by •
the indoor unit temperature sensor.
If setting value is “01”, room temperature is controlled by •
either indoor unit temperature sensor or remote control
unit sensor.
Setting record
Record any changes to the settings in the following table.•
Setting Setting Value
Ceiling height
Outlet directions
Filter sign
Cooler room temperature
correction
Heater room temperature
correction
Auto restart
Indoor room temperature
sensor switching function
After completing the FUNCTION SETTING, be sure to turn off
the power and turn it on again.
9.2. Function setting
Setting the Ceiling Height
Select the setting values in the table below according to •
the height of the ceiling. (The setting value is factory-set to
“00”.)
Setting Description Function Number Setting Value
Standard
(2.7 m)
20
00
High ceiling
(3.0 m)
01
The ceiling height values are for the 4-way outlet.
Do not change this setting in the 3-way outlet mode.
Setting the Outlet Directions
Select the setting values in the table below for using a 3-way •
outlet. (The setting value is factory-set to “00”.)
Setting Description Function Number Setting Value
4-way
22
00
3-way 01
Setting the Filter Sign
The indoor unit has a sign to inform the user that it is time to •
clean the fi lter.
Select the time setting for the fi lter sign display interval in the •
table below according to the amount of dust or debris in the
room. (The setting value is factory-set to “00”.)
If you do not wish the fi lter sign to be displayed, select the •
setting value for “No indication”.
Setting Description Function Number Setting Value
Standard
(2,500 hours)
11
00
Long interval
(4,400 hours)
01
Short interval
(1,250 hours)
02
No indication 03
Setting the Cooler Room Temperature Correction
Depending on the installed environment, the room tempera-•
ture sensor may require a correction. The settings may be
selected as shown in the table below. (The setting value is
factory-set to “00”.)
Setting Description Function Number Setting Value
Standard
30
00
Lower control 01
Setting the Heater Room Temperature Correction
Depending on the installed environment, the room tempera-•
ture sensor may require a correction. The settings may be
changed as shown in the table below. (The setting value is
factory-set to “00”.)
Setting Description Function Number Setting Value
Standard
31
00
Lower control 01
Slightly warmer control
02
Warmer control 03
Page 15
En-15
Indoor unit setting
Jumper wire
Remote control unit
signal code
JM1 JM2
Connect Connect A (Primary setting)
Disconnect Connect b
Connect Disconnect c
Disconnect Disconnect d
Indoor unit
Printed circuit board
9.3. Selecting the remote control unit signal
code
[When using the wireless remote controller]
When two or more air conditioners are installed in a room and
the remote control unit is operating an air conditioner other
than the one you wish to set, change the signal code of the
remote control unit to operate only the air conditioner you
wish to set (four selections possible).
When two or more air conditioners are installed in a room,
please contact your retailer to set the individual air conditioner
signal codes.
Confi rm the setting of the remote control unit signal code
and the printed circuit board setting.
If these are not confi rmed, the remote control unit cannot be
used to operate for the air conditioner.
Selecting the Remote Control Unit Signal Code
Use the following steps to select the signal code of the remote
control unit. (Note that the air conditioner cannot receive a
signal code if the air conditioner has not been set for the
signal code.)
Press the START/STOP button until only the clock is (1)
displayed on the remote control unit display.
Press the MODE button for at least fi ve seconds to display (2)
the current signal code (initially set to
).
Press the SET TEMP. (▲) (▼) button to change the signal (3)
code between . Match the code on the
display to the air conditioner signal code.
Press the MODE button again to return to the clock dis-(4)
play. The signal code will be changed.
If no buttons are pressed within 30 seconds after the signal
code is displayed, the system returns to the original clock
display. In this case, start again from step 1
The air conditioner signal code is set to A prior to shipment.
Contact your retailer to change the signal code.
The remote control unit resets to signal code A when the
batteries in the remote control unit are replaced. If you use a
signal code other than signal code A, reset the signal code
after replacing the batteries.
If you do not know the air conditioner signal code setting, try
each of the signal codes ( ) until you fi nd the
code which operates the air conditioner.
Page 16
En-16
Remote controller setting(3)
Turn on all of the indoor units.1.
When the indoor units are turned on, error codes 01
and 31 will be displayed; however, these error codes
will be deleted by setting the remote controller.
Therefore, continue with the setting procedure.
Set the master and slave settings.2.
Set the indoor unit that is not connected to the outdoor
unit using a transmission cable as the “01” .
(The setting value is factory-set to “00”.)
Indoor unit Unit number
Function
Number
Setting Value
①
00
51
00(Master)
②
01 01(Slave)
③
02
(Only triple type)
01(Slave)
After completing the function settings, turn off all of the 3.
indoor units, and then turn them back on.
If error code 01, 1F, 30, 31, or 32 is displayed, there *
may be an incorrect setting. Perform the remote
controller setting again.
Twin type
Indoor
unit ①
(master)
Outdoor
unit
Indoor
unit ②
(slave)
Remote
controller
DIP switch setting
(Indoor unit)
• Unit number
• Setting value
(Master/Slave)
Remote controller
setting
• Unit number
00 01
00 01
00 01
Triple type
Indoor
unit ①
(master)
Outdoor
unit
Indoor
unit ②
(slave)
Remote
controller
Indoor
unit ③
(slave)
DIP switch setting
(Indoor unit)
• Unit number
Remote controller
setting
• Unit number
00 01
00 01
02
02
00 01 01
: Transmission cable, Power supply cable
: Remote controller cable : Bus wire
: Power supply cable
• Setting value
(Master/Slave)
9.4. Special installation methods
This possible only the wired remote control. (Option)
CAUTION
When setting DIP switches, do not touch any other parts •
on the circuit board directly with your bare hands.
Be sure to turn off the main power.•
9.4.1. Simultaneous multi-system operation
By combining with an outdoor unit, 2 units for twin and 3 units •
for triple indoor units, can be switched ON/OFF simultanneously.
When different indoor unit models are connected some func-•
tions may no longer be available.
Wiring method(1)
Refer to 6.ELECTRICAL WIRING for wiring procedure and •
wiring method.
The indoor unit is connected the outdoor unit using a trans-•
mission cable is “master”.
Connect the remote controller wire to the master unit.•
Twin type
Indoor
unit ①
[master]
Outdoor
unit
Indoor
unit ②
[slave]
Remote
controller
Triple type
Indoor
unit ①
[master]
Outdoor
unit
Indoor
unit ②
[slave]
Remote
controller
Indoor
unit ③
[slave]
: Transmission cable, Power supply cable
: Remote controller cable : Bus wire
: Power supply cable
DIP switch setting (Indoor unit)(2)
Set the unit number of each indoor unit using the DIP
switches on the indoor unit circuit board. (See the follow-
ing table and fi gure.)
The DIP switches are normally set to make the unit
number 00.
Indoor unit Unit number
DIP SWITCH No.
1234
①
00 OFF OFF OFF OFF
②
01 ON OFF OFF OFF
③
02 OFF ON OFF OFF
DIP switches
ON
1234
Example :
Unit number 02
Circuit board in the control box of indoor unit.
NOTE
Be sure to set the unit numbers sequentially.
Page 17
En-17
Indoor unit Unit number
Function
Number
Setting Value
①
00
02
00〜15
②
01
〜
〜
⑮
14
⑯
15
After completing the function settings, turn off all of the 3.
indoor units, and then turn them back on.
If error code 01, 1F, 30, 31, or 32 is displayed, there *
may be an incorrect setting. Perform the remote
controller setting again.
: Transmission cable, Power supply cable
: Remote controller cable : Bus wire
: Power supply cable
Remote
controller
Indoor
unit 1
Outdoor
unit 1
Indoor
unit 2
Outdoor
unit 2
Indoor
unit 3
Outdoor
unit 3
Indoor
unit 4
Outdoor
unit 4
00 01 02 03
00 01 02 03
00 01 02 03
DIP switch setting
(Indoor unit)
• Unit number
• Setting value
(Refrigerant circut
address)
Remote controller
setting
• Unit number
NOTE
When different indoor unit models are connected using the •
group control system, some functions may no longer be available.
If the group control system contains multiple units that are •
operated simultaneously, connect and set the units as shown
below.
Simultaneous
triple
Simultaneous
twin
Standard
pair
Remote
controller
Indoor
unit 1
Outdoor
unit 1
Indoor
unit 2
Indoor
unit 3
Outdoor
unit 2
Indoor
unit 4
Indoor
unit 5
Indoor
unit 6
Outdoor
unit 3
: Transmission cable, Power supply cable
: Remote controller cable : Bus wire
: Power supply cable
00 01 02 03 04 05
00
01 01 02 02 0200
01 02 03 04 05
00 00 01 00 01 01
00 01 02 03 04 05
DIP switch setting
(Indoor unit)
• Unit number
Remote controller
setting
Refrigerant circuit
address setting
(Function number 02)
• Unit number
• Setting value
Master/Slave setting
(Function number 51)
• Unit number
• Setting value
*Make sure that the indoor unit with the unit number 00 is
connected to the outdoor unit using a transmission cable.
9.4.2. Group control system
A number of indoor units can be operated at the same time
using a single remote controller.
(1) Wiring method (indoor unit to remote controller)
123
123
123 123 123
Indoor
unit ①
Indoor
unit ②
Indoor
unit ③
Indoor
unit ④
Bus wire
Remote
controller cable
When ground wire is necessary
Remote controller
DIP switch setting (Indoor unit)(2)
Set the unit number of each indoor unit using the DIP
switches on the indoor unit circuit board. (See the follow-
ing table and fi gure.)
The DIP switches are normally set to make the unit
number 00.
Indoor unit
Unit number
DIP SWITCH No.
1234
①
00 OFF OFF OFF OFF
②
01 ON OFF OFF OFF
③
02 OFF ON OFF OFF
④
03 ON ON OFF OFF
⑤
04 OFF OFF ON OFF
⑥
05 ON OFF ON OFF
⑦
06 OFF ON ON OFF
⑧
07 ON ON ON OFF
⑨
08 OFF OFF OFF ON
⑩
09 ON OFF OFF ON
⑪
10 OFF ON OFF ON
⑫
11 ON ON OFF ON
⑬
12 OFF OFF ON ON
⑭
13 ON OFF ON ON
⑮
14 OFF ON ON ON
⑯
15 ON ON ON ON
Turn on all of the indoor units.1.
*1 Turn on the indoor unit with the unit number 00 last.
(Within 1 minute)
*2 When the indoor units are turned on, error codes
01 and 31 will be displayed; however, these error
codes will be deleted by setting the remote controller.
Therefore, continue with the setting procedure.
Set the refrigerant circuit address. 2.
Assign the same number to all of the indoor units connected to an outdoor unit.
(The unit is factory-set to “00”)
Page 18
En-18
10. TEST RUN
CHECK ITEMS
Is operation of each button on the remote control unit (1)
normal?
Does each lamp light normally?(2)
Do not air fl ow direction louvers operate normally?(3)
Is the drain normal?(4)
Is there any abnormal noise and vibration during opera-(5)
tion?
Do not operate the air conditioner in the running state for a •
long time.
CHECKING DRAINAGE.
To check the drain, remove the water cover and fi ll with 1 liter
of water as shown in the fi gure.
The drain pump operates when operating in the cooling
mode.
Wire cover
Drain pipe
Watering pot
Screw
• Test running
When the air conditioner is run by pressing the remote control unit test run button, the OPERATION and TIMER lamps
fl ash slowly at the same time.
[Operation method]
For the operation method, refer to the operating manual.•
The outdoor unit may not operate depending on the room •
temperature.
In this case, press the test run button on the remote control
unit while the air conditioner is running. (Point the transmit-
ter section of the remote control unit toward the air condi-
tioner and press the test run button with the tip of a ball-
point pen, etc.)
Transmitter section
Test run button
To end test operation, press the remote control unit START/•
STOP button.
(When the air conditioner is run by pressing the test run but-
ton, the OPERATION Lamp and TIMER Lamp will simulta-
neously fl ash slowly.)
[Using the wired remote control] (Option)
For the operation method, refer to the operating manual.•
Stop the air conditioner operation.(1)
Press the master control button and the fan control button (2)
simultaneously for 2 seconds or more to start the test run.
Test run display
Press the start/stop button to stop the test run.(3)
9.4.3. Dual remote controllers
Two separate remote controllers can be used to operate the •
indoor units.
The timer and self-diagnosis functions cannot be used on the •
slave unit of remote controller.
Wiring method (indoor unit to remote controller)(1)
1 231 23
1 2 3
Remote controller cable
Indoor unit
When ground wire
is necessary
Master unit Slave unit
Remote
controller
Remote
controller
Remote controller DIP switch 1 setting (2)
Set the remote controller DIP switch 1-No. 2 according to
the following table.
DIP SW 1-No. 2
Master unit OFF
Slave unit ON
Page 19
En-19
The OPERATION, TIMER and FILTER Lamp operate as follows table according to the error contents.
OPERATION
Lamp
TIMER
Lamp
FILTER
Lamp
Error contents
×
(2 times)
○ ×
Indoor signal error
×
(3 times)
○ ×
×
(4 times)
○ ×
×
(5 times)
○ ×
×
(8 times)
○ ×
Wired remote controller abnormal
(2 times)○(2 times)
○ ×
Indoor room temperature sensor error
(2 times)
○
(3 times)
○ ×
Indoor heat exchanger temperature sensor (middle) error
(2 times)○(4 times)
○ ×
Indoor heat exchanger temperature sensor (inlet) error
(2 times)○(6 times)
○ ×
Float switch operated
(3 times)○(2 times)
○ ×
Outdoor discharge pipe temperature sensor error
(3 times)○(3 times)
○ ×
Outdoor heat exchanger temperature
sensor (outlet) error
(3 times)
○
(4 times)
○ ×
Outdoor temperature sensor error
(3 times)○(7 times)
○ ×
Heat sink thermistor (Inverter) error
(3 times)○(8 times)
○ ×
Compressor temperature sensor error
(3 times)
○ ×
(2 times)○2-way valve temperature sensor error
(3 times)
○ ×
(3 times)○3-way valve temperature sensor error
(3 times)
○ ×
(4 times)
○
Outdoor heat exchanger temperature
sensor (middle) error
(3 times)
○ ×
(5 times)○Heat sink thermistor P.F.C. error
(4 times)○(2 times)
○ ×
Indoor manual auto switch abnormal
(4 times)
○
(4 times)
○ ×
Power supply frequency detection erro
r
(5 times)
○
(2 times)
○ ×
IPM protection
(5 times)○(3 times)
○ ×
CT error
(5 times)○(5 times)
○ ×
Compressor location error
(5 times)○(6 times)
○ ×
Outdoor fan error
(5 times)○(7 times)
○ ×
Connected indoor unit abnormal
(5 times)○(8 times)
○ ×
Outdoor unit computer communication error
(5 times)
○ ×
(2 times)○Inverter error
(6 times)○(2 or 3 times)
○ ×
Indoor fan abnormal
(7 times)○(2 times)
○ ×
Discharge temperature error
(7 times)○(3 times)
○ ×
Excessive high pressure protection on cooling
(7 times)○(4 times)
○ ×
4-way valve abnormal
(7 times)○(5 times)
○ ×
Pressure switch abnormal
, Pres-
sure sensor abnormal
(7 times)○(6 times)
○ ×
Compressor temperature error
(7 times)○(7 times)
○ ×
Low pressure error
(8 times)○(2 or 3 times)
○ ×
Active fi lter abnormal
(8 times)○(4 times)
○ ×
P.F.C. circuit error
(8 times)○(6 times)
○ ×
P.F.C. printed circuit board error
(9 times)○(2 times)
○ ×
Refrigerant circuit address set-up error
(9 times)○(3 times)
○ ×
Master unit, Slave unit set-up error
(9 times)○(4 times)
○ ×
Connected the indoor number set-up error
○
:0.5s ON/0.5s OFF (Flash) ×:OFF
11. 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
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
Are the wires and pipes
all connected completely?
No operation, heat or
burn damage
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
After installation is completed, has the proper
operation and handling
been explained to the
user?
12. ERROR CODES
If you use a wired type remote control, error codes will appear
on the remote control display. If you use a wireless remote
control, the lamp on the photo detector unit will output error
codes by way of blinking patterns. See the lamp blinking patterns and error codes in the table below.
Troubleshooting
[Troubleshooting with the indoor display]
Troubleshooting at the display is possible either on the wired
or wireless remote control.
FILTER Lamp
(RED)
TIMER Lamp
(ORANGE)
OPERATION Lamp
(GREEN)
MANUAL AUTO
Page 20
En-20
13. CUSTOMER GUIDANCE
Explain the following to the customer in accordance with the
operating manual:
Starting and stopping method, operation switching, tem-(1)
perature adjustment, timer, air fl ow switching, and other
remote control unit operations.
Air fi lter removal and cleaning, and how to use the air (2)
louvers.
Give the operating and Installation Manuals to the cus-(3)
tomer.
If the signal code is changed, explain to the customer how (4)
it changed (the system returns to signal code A when the
batteries in the remote control unit are replaced).
*(4) is applicable to using wireless remote control.
[Troubleshooting at the remote control LCD](Option)
This is possible only on the wired remote control.
[Self-diagnosis]
If an error occurs, the following display will be shown.
(“EE” will appear in the set room temperature display.)
Unit number
Error code
Ex. Self-diagnosis
SUMOTUWETH FR
SA
Error code Error contents
01
13
26
27
Indoor signal error
00 Wired remote controller abnormal
02 Indoor room temperature sensor error
04
Indoor heat exchanger temperature sensor
(middle) error
28
Indoor heat exchanger temperature sensor (inlet)
error
09 Float switch operated
0c Outdoor discharge pipe temperature sensor error
06
Outdoor heat exchanger temperature sensor
(outlet) error
0A Outdoor temperature sensor error
0E Heat sink thermistor (Inverter) error
15 Compressor temperature sensor error
1d 2-way valve temperature sensor error
1E 3-way valve temperature sensor error
29
Outdoor heat exchanger temperature sensor
(middle) error
2d Heat sink thermistor P.F.C. error
20 Indoor manual auto switch abnormal
2A Power supply frequency detection error
17 IPM protection
18 CT error
1A Compressor location error
1b Outdoor fan error
1F Connected indoor unit abnormal
1c Outdoor unit computer communication error
2E Inverter error
12 Indoor fan abnormal
0F Discharge temperature error
24 Excessive high pressure protection on cooling
2c 4-way valve abnormal
16
Pressure switch abnormal, Pressure sensor abnormal
2b Compressor temperature error
2F Low pressure error
19 Active fi lter abnormal
25 P.F.C. circuit error
30 Refrigerant circuit address set-up error
31 Master unit, Slave unit set-up error
32 Connected the indoor number set-up error
33 P.F.C. printed circuit board error
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