Toshiba MMY-MAP0724FT9UL,MMY-MAP0964FT9UL,MMY-MAP1204FT9UL,MMY-MAP0724FT6UL,MMY-MAP0964FT6UL,MMY-MAP1204FT6UL Owner's Manual

AIR CONDITIONER (MULTI TYPE)

Owner’s Manual

Outdoor Unit

Model name:

<Heat Recovery Model>

MMY-MAP0724FT9UL
MMY-MAP0964FT9UL
MMY-MAP1204FT9UL

MMY-MAP0724FT6UL
MMY-MAP0964FT6UL
MMY-MAP1204FT6UL

For OUTDOOR USE only

Pour une UTILISATION EN EXTÉRIEUR

uniquement

For commercial use

Not accessible to the general public

Vente interdite au grand public

Kein öffentlicher Zugang

Non accessibile a clienti generici

No destinado al público en general

Não acessível ao público em geral

Niet geschikt voor huishoudelijk gebruik

Μη προσβάσιμο από το γενικό κοινό

Недоступен для посторонних

Genel erişime açık değildir

Owner’s Manual 1

Manuel du propriétaire 18

English

Français

–1–

WARNING

Thank you very much for purchasing TOSHIBA Air Conditioner.
Please read this owner’s manual carefully before using your Air Conditioner.

• Obtain the “Owner’s manual” and “Installation manual” from constructor (or dealer).
Request to constructor or dealer

• Please clearly explain the contents of the Owner’s manual and hand over it.

ADOPTION OF NEW REFRIGERANT

This Air Conditioner adopts a new refrigerant HFC (R410A) instead of the conventional refrigerant R22 in order
to prevent destruction of the ozone layer.

This appliance is not intended for use by person (including children) with reduced physical, sensory or mental
capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction
concerning use of the appliance by a person responsible for their safety.

Contents

1 Precautions for safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

2 Part names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

3 Wired remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

4 Correct usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

5 Timer operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

6 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

7 Air conditioner operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

8 Louver direction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

9 Power saving mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

10 Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

11 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

12 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

1 Precautions for safety

Installing, starting up, and servicing air--conditioning equipment can be hazardous due to system pressures,
electrical components, and equipment location (roofs, elevated structures, etc.).
Only trained, qualified installers and service mechanics should install, start--up, and service this equipment.
Untrained personnel can perform basic maintenance functions such as cleaning heat exchanger. All other
operations should be performed by trained service personnel.
Before working on the equipment, observe precautions in the literature and on tags, stickers, and labels attached
to the equipment.
Follow all safety codes.Wear safety glasses and work gloves. Keep quenching cloth and fire extinguisher nearby
during brazing. Use care in handling, rigging, and setting bulky equipment.
Read these instructions thoroughly and follow all warnings or cautions included in literature and attached to the
unit. Consult local building codes and National Electrical Code (NEC) for special requirements. Recognize safety
information. This is the safety--alert symbol . When you see this symbol on the unit and in instructions or
manuals, be alert to the potential for personal injury.Understand these signal words: DANGER, WARNING, and
CAUTION. These words are used with the safety--alert symbol.
DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING
signifies hazards which could result in personal injury or death. CAUTION is used to identify unsafe practices which
may result in minor personal injury or product and property damage. NOTE is used to highlight suggestions which
will result in enhanced installation, reliability, or operation.
The manufacturer shall not assume any liability for the damage caused by not observing the description of this
manual.

General

• Carefully read Owner’s Manual before starting the air conditioner. There are many important things to keep in mind for daily
operation.

• Ask for installation to be performed by the dealer or a professional. Only a qualified installer is able to install an air
conditioner. If a non-qualified person installs an air conditioner, it may result in problems such as fire, electric shock, injury,
water leakage, noise and vibration.

• Do not use any refrigerant different from the one specified for complement or replacement.
Otherwise, abnormally high pressure may be generated in the refrigeration cycle, which may result in a failure or explosion
of the product or an injury to your body.

• Places where the operation sound of the outdoor unit may cause a disturbance. (Especially at the boundary line with a
neighbor, install the air conditioner while considering the noise.)

Transportation and storage

• During transporting the air conditioner, wear shoes with protective toe caps, protective gloves, and other protective clothing.

• To transport the air conditioner, do not take hold of the bands around the packing carton. You may injure yourself if the
bands should break.

• Before stacking the packing cartons for storage or transportation, heed the precautions written on the packing cartons.
Failure to heed the precautions may cause the stack to collapse.

• The air conditioner must be transported in stable condition. If any part of the product is broken, contact your dealer.

Installation

• Only a qualified installer or qualified service person is allowed to carry out the electrical work of the air conditioner. Under
no circumstances must this work be done by an unqualified individual since failure to carry out the work properly may result
in electric shocks and/or electrical leaks.

• After the installation work has been completed, have the installer explain about the circuit breaker positions. In the event
that trouble has occurred in the air conditioner, set the circuit breaker to the OFF position, and contact a service person.

• If the unit is installed in a small room, take appropriate measures to prevent the refrigerant from exceeding the limit
concentration even if it leaks. Consult the dealer from whom you purchased the air conditioner when you implement the
measures. Accumulation of highly concentrated refrigerant may cause an oxygen deficiency accident.

• Do not install the air conditioner in a location that may be subject to a risk of expire to a combustible gas. If a combustible
gas leaks and becomes concentrated around the unit, a fire may occur.

• If separately sold products are used, use Toshiba specified products only. Using unspecified products may cause fire,
electric shock, water leak or other failure.

• Connect ground wire. (grounding work) Incomplete grounding may cause an electric shock.

1-EN 2-EN

Operation

CAUTION

• Before opening the intake grille of the indoor unit or service panel of the outdoor unit, set the circuit breaker to the
OFF position. Failure to set the circuit breaker to the OFF position may result in electric shocks through contact with
the interior parts. Only a qualified installer or qualified service person is allowed to remove the intake grille of the
indoor unit or service panel of the outdoor unit and do the work required.

• Inside the air conditioner are high-voltage areas and rotating parts. Due to the danger of electric shocks or of your
fingers or physical objects becoming trapped in the rotating parts, do not remove the intake grille of the indoor unit or
service panel of the outdoor unit. When work involving the removal of these parts is required, contact a qualified
installer or a qualified service person.

• Do not move or repair any unit by yourself. Since there is high voltage inside the unit, you may get electric shock
during removing the cover and main unit.

• Use of a stand more than 50 cm high to clean the filter of the indoor unit or to carry out other such jobs constitutes
working at heights. Due to the danger of falling off the stand and injuring yourself while working at heights, this kind
of work should not be done by unqualified individuals. When this kind of work must be carried out, do not do it yourself
but ask a qualified installer or a qualified service person to do it for you.

• Do not touch the aluminum fin of the outdoor unit. You may injure yourself if you do so. If the fin must be touched, do
not touch it yourself but contact a qualified installer or a qualified service person.

• Do not climb onto or place objects on top of the outdoor unit. You may fall or the objects may fall off of the outdoor
unit and result in injury.

• Do not place any combustion appliance in a place where it is directly exposed to the wind of air conditioner, otherwise
it may cause imperfect combustion.

• When the air conditioner is operated with a combustion appliance in the same place, ventilate the room adequately.
Poor ventilation may causes oxygen shortage.

• When the air conditioner is used in a closed room, ventilate the room. Poor ventilation may causes oxygen shortage.

• Do not expose your body to cool air directly for a long time and do not cool yourself excessively.
Doing so may result in deteriorated physical condition and ill health.

• Do not insert your finger or a stick into the air intake or outlet.
Doing so may result injury as the fan is rotating at high speed inside the unit.

• Consult the shop where you purchased the air conditioner if air conditioning (cooling and heating) is not performed
properly as a refrigerant leakage may be the cause. Confirm the repair details with a qualified service person when
the repair includes additional charging of the refrigerant.

• Stop running the air conditioner and turn off the breaker before cleaning.
Otherwise, injury may result as the fan is rotating at high speed inside the unit.

Repairs

• If there is any kind of trouble (such as when an error display has appeared, there is a smell of burning, abnormal sounds
are heard, the air conditioner fails to cool or heat or water is leaking) has occurred in the air conditioner, do not touch the
air conditioner yourself but set the circuit breaker to the OFF position, and contact a qualified service person. Take steps to
ensure that the power will not be turned on (by marking “out of service” near the circuit breaker, for instance) until qualified
service person arrives. Continuing to use the air conditioner in the trouble status may cause mechanical problems to
escalate or result in electric shocks or other failure.

• If the fan grille is damaged, do not approach the outdoor unit but set the circuit breaker to the OFF position, and contact a
qualified service person to have the repairs done. Do not set the circuit breaker to the ON position until the repairs are
completed.

• If there is a danger of the indoor unit’s falling, do not approach the indoor unit but set the circuit breaker to the OFF position,
and contact a qualified installer or a qualified service person to refit the unit. Do not set the circuit breaker to the ON position
until the unit has been refitted.

• If there is a danger of the outdoor unit’s toppling over, do not approach the outdoor unit but set the circuit breaker to the
OFF position, and contact a qualified installer or a qualified service person to have the improvements or refitting done. Do
not set the circuit breaker to the ON position until the improvements or refitting is completed.

• Do not customize the unit. Doing so may result in fire, electric shock or other failure.

Relocation

• When the air conditioner is to be relocated, do not relocate it yourself but contact a qualified installer or a qualified service
person. Failure to relocate the air conditioner properly may result in electric shocks and/or a fire.

Cautions about installation (Confirm the following cautions.)

• Certainly lay the drain hose for perfect draining. Bad drainage may cause flooding in the house and getting furniture
wet.

• Use an exclusive power supply circuit for air conditioner at the rated voltage. An insufficient power supply capacity
or inappropriate installation may cause fire.

• Confirm that the outdoor unit are fixed on the base. Otherwise, falling down of the units or other accidents may occur.

Cautions about operation

• Do not use this air conditioner for special purpose such as preserving food, precision instruments, art objects,
breeding animals, car, vessel, etc.

• Do not operate the buttons with wet hands. Doing so may cause electric shock.

• If the air conditioner will not be used for a considerably long time, turn off the main switch or the circuit breaker, for
safety.

• To make the air conditioner operate in its original performance, operate it within the range of the operating
temperature specified in the instructions. Otherwise it may cause a malfunction, or water leak from the unit.

• Prevent any liquid from falling into the remote control. Do not spill juice, water or any kind of liquid.

• Do not wash the air conditioner. Doing so may result in electric shock.

• Check whether the installation base and other equipment have become deteriorated after being used for a long time.
Leaving them such condition may result in the unit’s falling down and causing injury.

• Do not leave flammable sprays or other flammable materials near the air conditioner, and do not spray flammable
aerosol directly to the air conditioner. They may catch fire.

• Stop running the air conditioner and turn off the breaker before cleaning.
Otherwise, injury may result as the fan is rotating at high speed inside the unit.

• Ask an authorized dealer or qualified service person for cleaning of the air conditioner
Cleaning the air conditioner in an improper manner may cause damage to plastic parts, insulation failure of electric
parts, and result in a malfunction. In the worst case, it may result in water leakage, electric shock, smoke emission
and fire.

• Do not put a water container such as a vase on the unit.
Water intrusion into the unit may occur and it may cause deterioration of electric insulation and result in electric shock.

• Ask for cleaning of the air conditioner to be performed by the dealer.
Cleaning the air conditioner in an improper manner may cause damage to plastic parts, insulation failure of electric
parts, etc. and result in a malfunction. In the worst case, it may result in water leakage, electric shock, smoke emissio n
and fire.

• Do not wash air conditioners with pressure washers.
Electric leaks may cause electric shocks or fires.

3-EN 4-EN

–2–

EN

–3–

DH79295001

 Warning indications on the air conditioner unit

Warning indication Description

WARNING

ELECTRICAL SHOCK HAZARD

Disconnect all remote electric power supplies before servicing.

 Information on the transportation, handling and storage of the

carton

Examples of indication on the carton

Symbol Description Symbol Description

Keep dry Do not drop

Fragile Do not lay down

11 cartons

Stacking height
(12 cartons can be stacked in this
case)

Do not step Handle with care

This side up

 Connectable indoor units

Model type Model Name

4-way cassette type MMU-AP✽✽✽H✽UL

CAUTION

High temperature parts.
You might get burned when removing this panel.

5-EN 6-EN

Compact 4-way cassette type MMU-AP✽✽✽MH✽UL
Ceiling type MMC-AP✽✽✽H✽UL

MMK-AP✽✽✽H✽UL

High wall type

Medium static ducted type MMD-AP✽✽✽BH✽UL
High static ducted type MMD-AP✽✽✽H✽UL
Slim ducted type MMD-AP✽✽✽SPH✽UL

* For details on these models, read the owner’s manuals that come with

the indoor units.

2 Part names

Air intake

Provided on the four sides

Fixing leg

Air discharge

Warm air comes out when cooling, and cool
air when heating.

Power wire hole

Refrigerant Conduit Connector

Connecting valve inside.

Ground screw

Equipped on the

electrical control box.

Discharge louver

Controls discharge air directions.

Air intake

Air in the room is taken in
through here.

Ground screw

Equipped on the
electrical control
box.

Knob

Open / close the air intake.

Knob

Open / close the air intake.

Ground screw

Equipped on the

electrical control box.

Air intake

Air in the room is

taken in through

here.

Discharge louver

Controls discharge air
directions.

Air filter

Filters out dust.

(Inside the air intake)

Discharge louver

Controls discharge air

directions.

Air intake

Air in the room is taken in through
here.

Ground screw

Equipped on the electrical control
box.

Air filter

Filters out dust.

(Inside the air intake)

(locally procured)

Air discharge

The air discharge duct is connected.

Ground screw

Equipped on the electrical control
box.

Air intake

The air suction duct is connected.

Ground screw

Equipped on the electrical control

box.

Air discharge

The air discharge duct is connected.

Air intake

The air suction duct is connected.

Drain pan

Air discharge

The air discharge duct is connected.

Air intake

The air suction duct is connected.

Ground screw

Equipped on the electrical control
box.

 Outdoor unit

 Indoor unit

◆ 4-way cassette type

◆ Ceiling type

◆ Medium static ducted type

◆ High static ducted type

◆ Compact 4-way cassette type

◆ Slim ducted type

7-EN 8-EN

–4–

EN

–5–

SET

TIME

TIMER SET

TEST

FILTER
RESET

TEMP.

CL

FAN

SAVE

SWING/FIX

VENT

MODE

ON / OFF

UNIT LOUVER

Display
section

Operation
section

Partition line

2

14

20

5

7

3

1

4
6

11

9

8

13

12

10

18

16

19

15

17

21

22

23

2

5

7

3

1

4
6

11

9

8

10

14

20

13

12

18

16

19

15

17

21

22

23

3 Wired remote control

This remote control can control the operation of up to 8 indoor units.
The remote control has two sections: The display section and the operation section.

 Display section

In the display below all the icons are shown. When the unit is in operation,
only relevant icons will be displayed.

• When the circuit breaker is turned on the first time, flashes on the
display part of the remote control.

• While this display is flashing, the model is being automatically confirmed.
Wait till display has disappeared to use the remote control.

12

Pre-heat display

Displayed when the heating mode is energized or
defrost cycle is initiated.
While this indication is displayed, the indoor fan
stops.

13

No function display

Displayed when the function requested is not
available on that model.

14

Fan speed display

The selected fan speed mode is displayed.

(AUTO)
(HIGH)
(MED.)
(LOW)

1 SETTING display

Displayed during setup of the timer or other
settings.

2 Operation mode

The selected operation mode is displayed.

3 Error display

Displayed while the protective device works or a
error occurs.

4 Timer display

When a malfunction occurs, an error code is
displayed.

5 Timer Mode display

9-EN 10-EN

Displays the timer mode.

6 Filter display

, reminder to clean the air filter.

7 TEST run display

Displayed during a test run.

8 Louver position display

Displays louver position.
* Only for 4-way cassette type, Compact 4-way

cassette type, Ceiling type, High wall type.

9 Swing display

Displayed during up / down movement of the
louver.

10

Set temperature display

The selected set temp. is displayed.

11

Remote control sensor display

Displayed while the sensor of the remote control is
used.

Only “HIGH” is displayed for the high static
ducted type.

15

Louver Number display.

Louvers can be controlled individually. Displays
which louver is being set.
(exapmle:01, 02, 03, 04)
(4-way cassette only)

16

Power saving mode display

Displayed when power saving mode is activated.

17

Louver lock display

Displayed when louver is locked or there is a
louver-locked unit in the group.
(4-way cassette type only)

18

UNIT No. display

Displays the number of the indoor unit selected.
Also displays error code of indoor and outdoor
units

19

SET DATA

Displayed during advanced setting.

20

Service display

Displayed while the protective device works or a
trouble occurs.

21

Function unavailable display

Displayed when the requested function is currently
unavailable.

22

Central control indicator

Displayed when the air conditioner is controlled
centrally and used with central control devices
such as the central remote control.
If the use of the remote control is prohibited by the
central control, blinks when the ON/OFF,
MODE, or TEMP. button on the remote control is
pushed, and the buttons do not function. (Settings
that can be configured on the remote control differ
depending on the mode of the central control. For
details, read the Owner’s Manual of the central
remote control.)

23

Operation mode controlled indicator

Displayed when MODE button is pushed while
operation mode is fixed to cool or heat by the air
conditioner administrator.

 Operation section

SWING/FIX

UNIT LOUVER

Push each button to select a desired operation.

• The control saves commands in memory and after the initial setting, there is no need for any additional settings
unless changes are desired. The air conditioner can be operated by pushing the button.

8

1

9

12

2

10

6

4

5
3

1 button

Selects the desired Fan speed.
Not available for the high static ducted type.

2 button

Use to setup the timer.

3 button

Use only for service.
(During normal operation, do not use this button.)

4 button

Use when a power ventilation kit (commercially­supplied) is connected.

• If “ ” is displayed on the remote control when
pushing the Ventilation button, no vent kit
connected.

5 button

Resets “ ” display after cleaning filter.

6 button

Use to activate or deactivate power saving mode.

7 button

Use to select automatic swing or fixed louver
position.
* Not available for duct type.

8 Operation lamp

Green light illuminates when unit is on.
Although it flashes when operating the protection
device or an error occurs.

11

7

9 button

When the button is pushed, the operation starts, and
it stops by pushing the button again.
When the operation has stopped, the operation
lamp and all the displays disappear.

10

11

12

OPTION:

Remote control sensor

Usually the temperature sensor of the indoor unit
senses the temperature. The temperature on the
surrounding of the remote control can also be sensed.
For details, contact the dealer from which you have
purchased the air conditioner.

button

Selects desired operation mode.

button

Selects a unit number (left) and louver number
(right).
UNIT :
Selects an indoor unit when adjusting louver
direction when multiple indoor units are controlled
with one remote control.
LOUVER :
Selects a louver when setting louver lock or louver
direction adjustment independently.
* 4-way cassette type only

button

Adjusts the set point.
Select the desired set point by pushing TEMP.

or TEMP. .

EN

11-EN 12-EN

–6–

4 Correct usage

REQUIREMENT

SET

TIME

TIMER SET

TEST

FILTER
RESET

TEMP.

CL

FAN

SAVE

SWING/FIX

VENT

MODE

ON / OFF

UNIT LOUVER

1

3

2

4

Heat Dry Cool Fan

(Dehumidify)

Auto

Auto

High

Med. Low

NOTE

When the air conditioner is used for the first time or the setting is changed, follow the steps below. Settings are
saved in memory and are displayed anytime the unit is turned on by pushing the button.

 Preparation

When the circuit breaker is turned on, the partition lines are displayed on the remote control.
* After the circuit breaker is turned on, the remote control does not accept any commands for approx. 1 minute,

this is not a failure.

When the air conditioner is re-powered after it has not been used for a long period, turn on the circuit breaker at least
12 hours before starting the air conditioner.

3 Select fan speed with “ ” button.

The fan speed changes each time the button is
pushed in the order shown below.

Start

1 Push button.

The operation lamp illuminates, and the operation
starts.

2 Select an operation mode with the “ ”

button.

The operation mode changes each time the button
is pushed in the order shown below.

• When fan is in “
adjusted based on difference between set point
and room temperature.

• In heating operation, if the room temperature is
not heated sufficiently with volume “ Low”
operation, select “ Med.” or “ High”
operation.

• The temperature sensor detects the return air
temperature at the indoor unit, which differs
from the room temperature depending on the
installation condition.
Set point is a target of room temperature.
( “Auto” is not selectable in the Fan
mode.)

The fan speed selecting function is not available
for the high static ducted type.
Only “HIGH” is displayed.

4 Select the set point temperature by pushing

the “TEMP. ” or “TEMP. ” buttons.

.

Auto”, fan speed is

–7–

Cooling

• If there is a demand for cooling, unit will start
approximately 1 minute after mode is selected.

Heating

• If there is a demand for heating, unit will start
approximately 3 to 5 minutes after the mode is
selected. (The pre-heat indicator is displayed on
the remote control.)

• After the heating operation has stopped, Fan may
continue to run for approx. 30 seconds.

• When the room temperature reaches the set
temperature and the outdoor unit stop s, the indoor unit
fan runs at ultra low speed and the outdoor unit fan
runs at low speed. (For high static ducted type, the fan
speed does not change after the temperature has
reached to the set point.)
During defrost operation, the fan stops so that cool air is
not discharged. (“ ” Pre-heat is displayed.)

Auto mode

• When in Auto Mode, the unit selects the operating
mode (cooling, heating or fan only) based on the user
set point temperature.

When restarting the operation after stop

• When attempting to restart the unit immediately after
it was stopped, the unit can not start for approx.
3 minutes this is to protect the compressor.

“ Dry” is not available for the high static ducted
type.

Stop

Push button.

The operation lamp goes off, and the operation stops.
In the Cool, Dry, or Auto (cooling) mode, the fan runs
for 10 minutes (or more) for self cleaning.

13-EN 14-EN

5 Timer operation

NOTE

1

3

2
4

(OFF timer) (ON timer)(Repeat OFF timer)

No display

OFF OFF ON

Number of days Time

SWING/FIX

•

Three timer modes are available: (Setting of up to 168 hours is enabled.)
OFF timer : The unit stops when the set time is reached.
Repeat OFF timer : The unit stops daily when the set time is reached.
ON timer : The unit starts when the set time is reached.

 Timer operation

Set

1 Push button.

The Timer mode changes each time the button is
pushed.

• In the case of 34 hours (*

2

)

shows 1 day (24 hours).

shows 10 hours. (Total 34 hours)

6 Installation

 Location

• Avoid installing near machines emitting high frequency waves.

• Not suitable for chemical plants such as liquefied carbon dioxide refrigerant plants.

• Places where iron or other metal dust is present. If iron or other metal dust adheres to or collects on the interior
of the air conditioner, it may spontaneously combust and start a fire.

• A failure may occur in certain locations such as the following:

• Areas with large amount of oil droplets (including machine oil) or vapors

• Salty areas near oceans, etc.

• Hot springs emitting sulfidizing gas.

• Heavily acidic or alkaline places.
Special maintenance or parts are required for use in the above places. For details, contact the dealer where you
purchased the product.

• Leave an enough space around the air intake and outlet of the outdoor unit so that the ventilation is not restricted.

• Avoid places where strong wind may blow against the air intake and discharge of the outdoor unit.

• Attach a snow stand, snow hood, etc. to the outdoor unit for use in snowfall areas. For details, contact the dealer
where you purchased the product.

• Make drain water from the outdoor unit is emitted into places with good drainage.

• Attach the air filter to the indoor unit. If not, dust may accumulate on the heat exchanger or other parts in the air
conditioner and cause a water leak.

• Keep a distance of at least 3.3 ft (1 m) between the air conditioner / remote control and a TV or radio. Failure to
observe this precaution may cause visual disturbance or noise.

• Leave a distance of at least 4.9 ft (1.5 m) between the air discharge and a fire alarm. If this precaution is not
observed, the alarm may not work properly or detect fire in case of fire.

• and timer display flashes.

2 Push to select “set time”.

• With every push of button, the set time
increases by 0.5 hr (30 minutes).
When setting a time more than 24 hours for
timer operation, timer can be set in increments
of 1 hr.
The maximum set time is 168 hr (7 days).
The remote control displays the set time with
time (between 0.5 and 23.5 hours) (*
number of days and time (24 hours or more) (*
as shown below.

• With every push of button, the set time
decreases by 0.5 hr (30 minutes) (0.5 -

23.5 hours) or 1 hr (24 - 168 hours).

Example of remote control display

• In the case of 23.5 hours (*

1

)

1

) or

3 Push button.

• display disappears and timer time
display goes on, and or display
flashes.
(When ON timer is activated, timer time, ON
timer are displayed and other displays
disappear.)

4 Cancel of timer operation

Push button.

2

)

Timer display disappears.

• When the operation stops after the timer reached
the preset time, the Repeat OFF timer resumes the
operation by pushing button and stops the
operation after the time of the timer has reached the
set time.

• When is pushed while the OFF timer function
of the air conditioner is active, the indication of the
timer function disappears and then appears again
after about 5 seconds.
This is due to normal processing of the remote
control.

 Be careful of operation sounds

• Locate the unit in a place secure enough so that the sounds and vibrations do not increase.

• If something is placed near the air discharge of the outdoor unit, noise may increase.

• Do not disturb neighbors with cool / warm air or noise coming from the air discharge of the outdoor unit.

15-EN 16-EN

–8–

EN

–9–

NOTE

7 Air conditioner operations

 Check before operation

• Turn on the power switch at least 12 hours before
starting operation.

• Connect the ground wire securely.

• Attach the air filter to the indoor unit.

 Heating performance

• A heat pump system, which gathers outside heat and
emits it into a room, is used for heating. When the
outside air temperature falls, the heating capacity of
the unit is reduced.

• When the outside temperature is low, it is
recommended that other heating equipment is used.

 Defrosting during heating

• If frost falls on the outdoor unit during heating,
defrosting is automatically performed (for
approximately 2 - 10 minutes) to increase the
heating effect.

• The fan of the indoor unit is stopped during
defrosting.

 3-minute protection

The outdoor unit will not operate for approximately 3
minutes after the air conditioner has been immediately
restarted after stopping, or the power switch has been
turned on. This is to protect the system.

 Fan rotation of a stopped

indoor unit

• While other indoor units operate, the fans on indoor
units in stand-by mode rotate for several minutes
approximately once per one hour to protect the
machines.

 Protective device

(High pressure switch)

The high pressure switch stops the air conditioner
automatically when excessive load is applied to the air
conditioner.
If the protective device activates, the unit’s running
stops and the operation lamp blinks.
When the protective device activates, the indicator
and the check code are displayed on the remote
control.
The protective device may activate in the following
cases:

During cooling

• When the air intake or air discharge of the outdoor
unit is blocked.

• When strong wind blows continuously against the air
discharge of the outdoor unit.

During heating (for heat-pump model only)

• When dust or dirt is excessively adhered to the air
filter of the indoor unit.

• When the air discharge of the indoor unit is blocked.

 Cooling / Heating operations

• When the outdoor temperature goes out of the
operable range, cooling or heating operation may not
be performed in order to protect the equipment. In
this case, “ ” goes on.

• If the outside temperature decreases during
operation, the fan of the outdoor unit may stop.

 Characteristics of heating

• Air does not come out immediately after heating
starts.
Heated air comes out after 3 to 5 minutes
(depending on the room / outside temperatures),
after the indoor heat exchanger warms up.

• When the outside temperature increases, the
outdoor unit may stop.

 Auto restart

The unit will stop after a power failure.

• The unit will restart automatically in the same
operating mode as before the power failure when the
power is restored.

17-EN 18-EN

When the protective device activates, turn off the power
switch, remove the cause, and then restart running.

8 Louver direction

NOTE

CAUTION

NOTE

SWING/FIX

Initial setting

Initial setting

Initial setting

SWING/FIX

Repeat

SWING/FIX

FAN/HEAT COOL/DRY

FAN/HEAT
operation

COOL/DRY
operation

UNIT LOUVER

Unit No.

1-4

No

display

Unit No.

1-1

Unit No.

1-2

Unit No.

1-3

No

display

Unit No.

1-1

Unit No.

1-2

Unit No.

1-3

Unit No.

1-4

UNIT LOUVER

No
display

Louver No.

03

01

0204

Refrigerant
pipe

Drain pipe

Electrical control box

• To improve the cooling / heatin g performance, change
the louver angle for each operation.

• This function is not available for duct type units.

The characteristics of air: Cool air falls, and warm
air rises.

Point the louver horizontally during cooling

If pointing downward for cooling, dew may form on the
surface of the air discharge or louver and may drop
down.

• If pointing horizontally for cooling, dew may form on
the surface of the cabinet or louver and may drop
down.

• If pointing horizontally for heating, the room
temperature may be uneven.

• Do not handle the louver manually.
Doing so may cause a failure.
Use the SWING/FIX button on the remote control to
adjust the angle.

 4-way cassette type, Compact

4-way cassette type, Ceiling
type

◆ To set the louver direction

1 Push the button during running.

The louver direction changes with each push of
the button.

▼ For heating (For heat-pump model only)

Point the louver downward.
If not pointing downward, hot
air may not reach the floor.

▼ For cooling

Point the louver horizontally.
If pointing downward, dew
may form on the surface of
the air discharge port and
may drop down.

▼ For fan

Select a wind direction.

◆ To stop swinging

1 Push the button at the desired

position while the louver is swinging.

• Push the button repeatedly to change

* However, even if the button is pushed

▼ Indications when swinging is stopped

In this case, push the button again after 2
seconds.

• In Cool/Dry operation, the louver does not stop

▼ Indications when swinging is stopped

SWING/FIX

SWING/FIX

the louver position again.

while the louver is swinging, one of the
indications below may sometimes be displayed
and may not set the louver to the highest
position.

SWING/FIX

as it directs downward. If stopping the louver as
it directs downward during swing operation, it
stops after moving to the third position from the
highest position.

 4-way cassette type only

◆ To set the louvers individually

1 Push the button (left side of the

button) during running to select a unit.

The unit number changes each time the button is
pushed.

• When no unit number is displayed, all units are

UNIT LOUVER

selected.

2 Push the button (right side of the

button) to select a louver.

Each time the button is pushed, the indicator on
the left of the remote control changes as follows:

* When no louver number is displayed, all 4

louvers are selected.

◆ Unit select

• When two or more indoor units are controlled with
one remote control, the louver direction can be set
for each indoor unit by selecting them individually.

• To set louver direction individually, push the
button (left side of the button) to display an indoor
unit number in the control group. Then set the louver
direction of the displayed indoor unit.

• When no indoor unit number is displayed, all indoor
units in the control group can be controlled
simultaneously.

• Each time the (left side of the button) is
pushed, the indication changes as follows:

UNIT LOUVER

◆ To start swinging

1 Push the button repeatedly to set the

louver direction to the lowest position, then

SWING/FIX

push again.

The SWING indicator is displayed and the
louver begins swinging.

▼ In all operations

19-EN 20-EN

–10–

EN

–11–

REQUIREMENT

SWING/FIX

(1) (2) (3) (4)

(7) (6) (5)

UNIT LOUVER

No
display

Unit No.
1-1

Unit No.
1-2

Unit No.
1-3

Unit No.
1-4

Swing code

Swing

Horizontal

Downward

Downward

Horizontal

Downward

Downward

Horizontal

Horizontal

(3)

(2)

(1)

(1)

(4)

(2)

(3)

(2)

(3)

(4)

(1)

(4)

(3)

(2)

(1)

(4)

UNIT LOUVER

Unit No.

1-1

Unit No.

1-2

Unit No.

1-3

Unit No.

1-4

(1)

0001

(2)

0002

(3)

0003

(5)

0005

(4)

0004

Refrigerant
pipe

Drain pipe

Electrical control box

3 Push the button to confirm the

direction of the selected louver.

Each time the button is pushed, the indication
changes as follows:

* When cooling or drying, (4) and (5) are not

displayed.

◆ Setting the swing pattern

1 Push and hold the FIX for at least 4

seconds while the operation is stopped.

2 Push the button (left side of the button)

to select a unit.

The unit number changes each time the button is
pushed.

The fan of the selected unit runs, and the louver
swings.

3 Push the buttons to select a swing

type.

Swing code Movement pattern

0001

0002 Dual swing
0003 Cyclic swing

Do not set “0000”.
(The louver may be damaged.)

blinks.

SWING/FIX

Standard swing
(factory default)

4 Push the button.
5 Push the button to finish the setting.

▼ Standard swing

All four louvers swing simultaneously at the same
angle.

▼ Dual swing (Recommended for heating)

• Adjoining louvers alternately point horizontally and
downward to heat the room evenly.

• Air blown downward reaches the floor, and air blown
horizontally is spread to circulate heat.

▼ Cyclic swing (Recommended for cooling)

All four louvers swing at different times like waves.

◆ Setting the louver lock

1 Push and hold the button (right side of

the button) for at least 4 seconds while
running is stopped.

blinks.

• When no unit number is displayed, all units are
selected.

2 Push the button (left side of the button)

to select a unit.

The unit number changes each time the button is
pushed.

The fan of the selected unit runs, and the louver
swings.

UNIT LOUVER

3 Push the “TEMP. ” buttons to

display the number of the louver to fix its
direction.

The selected louver swings.

4 Push the buttons to select the

direction of the louver you do not want to
swing.

* If (4) or (5) is selected, condensation may occur

during cooling.

03

0204

01

5 Push the button to confirm the setting.

When the setting is confirmed, the mark lights
up.
(To set the louver lock of another unit, repeat from
Step 2. To set another louver lock of the same unit,
repeat from Step 3.)

21-EN 22-EN

6 Push the button to finish the setting.

NOTE

0001 - 0005
(Louver position
code)

Louver No.

0000

SET DATA

Unit No.

1-1

Unit No.

1-2

Unit No.

1-3

Unit No.

1-4

No display

UNIT LOUVER

Unit No.

1-4

No

display

Unit No.

1-1

Unit No.

1-2

Unit No.

1-3

* F1 appears in the CODE No. section on the

remote control. This indicates that the louver 01
shown in the following figure is selected.

Even in louver lock mode, the louver temporarily moves
in the following cases:

• When the air conditioner is stopped

• When heating starts

• When defrosting

• When thermo. off.

◆ Releasing the louver lock

Set “0000” in Step 4 of “Setting the louver lock”.

The mark disappears.

* Steps 1 - 3 and 5, 6 of “Setting

the louver lock” also apply to
releasing the lock.

◆ Adjusting the horizontal direction

1 Push and hold the and “TEMP. ”

buttons for at least 4 seconds while running
is stopped.

blinks.

“01” appears in CODE No.

2 Push the button (left side of the button)

to select a unit

The unit number changes each time the button is
pushed.

The fan of the selected unit runs, and the louver
swings.

UNIT LOUVER

3 Push the “TEMP. ” buttons to

change the CODE No. to “45”.

4 Push the “TIME ”buttons to select a

direction.

Direction SET

DATA

“0000”

“0002”

Direction setting

Smudging reduction position

(reduces ceiling smudging)

Cold draft preventive position

(Prevent cold draft)

[Factory default]

5 Push the button to check the settings.

The indicator stops blinking and stays lit, and the
settings are confirmed.

6 Push button to finish the setting.

* If the cold draft position is selected, the ceiling

smudging reduction effect will be reduced.

 4-way cassette type

▼ When cooling

Point the louver horizontally.

▼ When heating (for heat-pump model only)

Point the louver downward.

• The louver automatically closes when running is
stopped.

• In pre-heating mode, the louver points upward.
The swing indication appears on the remote control
even in pre-heating mode, but the actual swing starts
only after pre-heating is complete.

▼ 2-way and 3-way air discharge

The air discharge can be changed to the 2-way or 3­way type to suit the room shape and style.
For details, contact the dealer where you purchased
the air conditioner.

 Ceiling type

Vertical adjustment

▼ When cooling

Point the louver horizontally to send cool air across the
entire room.

▼ When heating (for heat-pump model only)

Point the louver downward to send heated air to the
floor.

• The louver automatically points upward when
running is stopped.

• In pre-heating mode, the louver points upward.
The swing indication appears on the remote control
even in pre-heating mode, but the actual swing starts
only after pre-heating is complete.

Horizontal adjustment

When adjusting louver direction horizontally, point the
vertical grille inside the horizontal louver in preferred
direction.

◆ Unit select

• When two or more indoor units are controlled with
one remote control, the louver direction can be set
for each indoor unit by selecting them individually.

• To set louver direction individually, push the
button (left side of the button) to display an indoor
unit number in the control group. Then set the louver
direction of the displayed indoor unit.

• When no indoor unit number is displayed, all indoor
units in the control group can be controlled
simultaneously.

• Each time the (left side of the button) is
pushed, the indication changes as follows:

UNIT LOUVER

23-EN 24-EN

–12–

EN

–13–

NOTE

WARNING

Check

periodically!

Close.

Do not cool

down too

much!

9 Power saving mode

Push button during operation.

• The air conditioner enters power saving mode.

• appears on the display.

Power saving mode will stay in effect until it is
cancelled.
To cancel the power saving mode, push
button again.

• disappears.

10Performance

To save energy and perform comfortable cooling
and heating

Clean the air filter often

• A clogged air filter lowers the cooling / heating
performance.

Close windows and doors

• Do not let cooled / heated air escape from the room.

• Power saving mode consumes less energy, but may
not heat / cool the room as much as normal mode.

• Even when operation start / stop, operation mode
change, or power reset is performed during the power
saving mode, the power saving mode is retained until
the next operation.

• Cooling / Heating too much is bad for your health.
In particular, take care with handicapped / old people
and children.

Cool / Heat the room evenly

• Adjust the air direction with the louver.
Exposing yourself to blowing air directly for a long
time is bad for your health.

Air conditioner operating conditions

For proper performance, operate the air conditioner under the following temperature conditions:

Outdoor temperature : 14 °F to 109 °F (-10 °C to 43 °C) (Dry bulb temperature) *

Cooling operation

Heating operation

* If air conditioner is used outside of the above conditions, safety protection may activate.

• When the outside temperature exceeds 70 °F (21 °C), it cannot operate heating. When the outside temperature
is below 14 °F (-10 °C), it cannot operate cooling. In these cases, “ ” will be displayed on remote control display
section.

• The cooling performance may decline considerably when total operating capacity of cooling indoor units is less
than 38 kBtu/h while ambient temperature is below 32 °F (0 °C).

Room temperature :

[CAUTION]

Outdoor temperature : -4 °F to 60 °F (
Room temperature : 59 °F to 82 °F (15 °C to 28 °C) (Dry bulb temperature)

Room relative humidity – less than 80 %. If the air conditioner operates in excess of
this figure, condensation may occurs on the surface of the air conditioner.

70 °F to 90 °F (21 °C to 32 °C) (Dry bulb temperature),
59 °F to 75 °F (15 °C to 24 °C) (Wet bulb temperature)

-20 °C to 15.5 °C) (Wet bulb temperature)

Do not cool / heat too much

Do not expose your body to cool air directly for a
long time and do not cool yourself excessively.

Doing so may result in deteriorated physical condition
and ill health.

25-EN 26-EN

11Maintenance

WARNING

NOTE

REQUIREMENT

CAUTION

Antibacterial glass

Air intake

Knob

Strap to
prevent falling

Air filter

Air intake

Knob

Cleaning the air filter and other parts of the air filter involves dangerous work in high places, ask a service
person to do it.
Do not attempt to do it by yourself.
To avoid the possibility of electric shock, always turn off power to the system before performing any cleaning
or maintenance to the system. Turn off the outdoor disconnect switch located near outdoor unit.
Operating the system with dirty filters may damage the indoor unit and could cause reduced cooling
performance.

Periodic Maintenance - periodic maintenance is recommended to ensure proper operation of the unit.
Recommended maintenance intervals may vary depending on the installation environment, e.g. dusty zones. Refer
to table below.

Periodic Maintenance

INDOOR UNIT EVERY MONTH EVERY 4 MONTHS EVERY YEAR

Clean Air Filter*
Clean Drain Pan
Clean indoor heat exchanger*
Clean fan*
Change Remote Control Batteries

Clean Outdoor heat exchanger from Outside
Clean Outdoor heat exchanger from Inside*
Blow Air Over Electric Parts*
Check Electric Connection Tightening*
Clean Fan Wheel*
Check Fan Tightening*
Clean Drain Pans*

*1: Increase frequency in dusty zones.
*2: Maintenance to be carried out by qualified service personal.

1

2

2

OUTDOOR UNIT EVERY MONTH EVERY 4 MONTHS EVERY YEAR

2

2

2

2

2

2

1

1

1

1
1
1

1
1
1
1
1
1

 4-way cassette type

Clean the heat exchanger with pressurized water.

If a commercially available detergent (strong alkaline or
acid) cleaning agent is used, the surface treatme nt of the
heat exchanger will be marred, which may degrade the
self cleaning performance.
For further details, contact the dealer.

Replacing antibacterial glass

Request your dealer to replace the antibacterial glass
every 10000 hours of cooling operation.

Part code 43179152

Cleaning the air filter

If is displayed on the remote control, clean the air
filter.

1 Open the air intake by sliding the latches.

Let the grille drop while holding it.

2 Remove the air filter from grille.

3 Vacuum the filter and rinse it with water.
4 Dry the filter.
5 Wipe the inside of the air intake with water or

mild detergent and then dry it.

6 Reinstall the filter.
7 Close the grille and secure it to the frame by

the latches.

The high static ducted type and slim ducted type are not equipped with an air filter when shipped from the factory.
The type of air filter (locally procured), installation position, and maintenance method vary depending on the local duct
design. For details, contact the contractor or dealer from whom you purchased the product.

27-EN 28-EN

–14–

8 Push button to reset filter timer.

“FILTER ” disappears.

Do not start the air conditioner while leaving the panel
and air filter removed.

EN

–15–

NOTE

2)Insert in the louver sagging
down the center downward.

1) Insert

latch

Air intake

S

l

i

d

e

Hook

Air filter

Handle

Handle

Hook

Air intake

Latch

Air filter

CAUTION

Button

Air intake grille

Air filter

Strap to prevent
falling

Button

Air intake grille

Cleaning Unit Grille and Frame

To clean the grille and the frame, wipe the outside with
a soft, dry cloth. If necessary, a mild liquid detergent
can be applied and wiped off with a dry cloth.

Cleaning The Louvers

1 Remove the discharge louver by holding it at

both ends and pulling downwards towards
the center.

2 Clean the louvers with water or mild

detergent.

3 Mount the discharge louver by inserting one

end and bending it outwards to allow the
other end to be inserted.

Install the louvers as side with marking faces upwards.

Preparing for long Shut Down Period

1 Clean the filters and reposition them in unit.
2 Operate the unit in fan mode for 3 or 4 hours

to dry all internal parts.

3 Turn the unit off and disconnect the main

power supply.

4 Before unit is turned on again, make sure the

circuit breaker has been turned on for at
least 12 hours.

 Ceiling cassette type

Cleaning the air filter

If is displayed on the remote control, clean the air
filter.

1 Open the air intake by sliding the latches.

Let the grille drop while holding it.

2 Remove the air filter from grille.

3 Vacuum the filter and rinse it with water.
4 Dry the filter.
5 Wipe the inside of the air intake with water or

mild detergent and then dry it.

6 Reinstall the filter.
7 Close the grille and secure it to the frame by

the latches.

Do not start the air conditioner while leaving the panel
and air filter removed.

Cleaning Unit Grille and Frame

To clean the grille and the frame, wipe the outside with
a soft, dry cloth. If necessary, a mild liquid detergent
can be applied and wiped off with a dry cloth.

Preparing for long Shut Down Period

1 Clean the filters and reposition them in unit.
2 Operate the unit in fan mode for 3 or 4 hours

to dry all internal parts.

3 Turn the unit off and disconnect the main

power supply.

4 Turn on the circuit breaker for at least 12

hours before unit is turned on again.

 Compact 4-way cassette type

1 Open the air intake grille.

Slide the air intake grille buttons to detach the air
intake grille from the main ceiling panel. Lower the
grille slowly whilst holding.

2 Take out the air filter.

Push the extrusion of the air filter away from the
grille and remove.

3 Cleaning with water or vacuum cleaner

• If dirt is heavy, clean the air filter using tepid
water with a neutral detergent or just water.

• After cleaning with water, dry the air filter
sufficiently in a shaded place.

4 Mount the air filter.
5 Close the air intake grille.

Close the air intake grille, slide the button to locate
into the ceiling panel fixing securely.

6 Push the “FILTER RESET ” button.

display disappears.

29-EN 30-EN

8 Push button to reset filter timer.

“FILTER ” disappears.

◆ Cleaning of air discharge louver

NOTE

(2) Insert in the louver
sagging down the
center downward.

(1) Insert

4

1, 3

Cover plate fixing
screws

Cover plate

CAUTION

Filter rack

Air filter
(locally procured)

Air filter
(locally procured)

The air discharge louver can be removed to clean if
necessary.

1 Remove the air discharge louver.

Holding both ends of the air discharge louver,
remove it by sagging the center downwards.

 Medium static ducted type

Air filter replacement

If is displayed on the remote control, replace the air
filter.

1 Push the button to stop the

operation, then turn off the circuit breaker.

2) Pull out the filter rack, and set the air filter
(locally procured) in it.

2 Clean the air discharge louver with water.

If dirt is heavy, clean the air discharge louver using
tepid water with neutral detergent or just water.

3 Mount the air discharge louver.

First push in the one side, and insert the opposite
side by sagging the center downwards.

Insert the louver in the correct direction.

Insert the louver with the printed mark facing upwards,
and the arrow on the louver pointing in the outward
direction.

2 Replace the new air filter. (locally procured)

1) Remove the cover plate.

Remove the cover plate with 2 screws.

3) Push the filter rack in fully and reattach the
cover plate. (Screws x 2)

3 Turn on the circuit breaker, then push the

button on the remote control to start

the operation.

4 After cleaning, push .

display disappears.

• Do not start the air conditioner while leaving air filter
removed.

• Push the filter reset button. ( indication will be turn
off.)

31-EN 32-EN

–16–

EN

12Troubleshooting

CAUTION

Check code

Indoor unit No. in which
an error occurred

3

2

1

S

E

TIMER SE

TEST

FIL

TER

RESE

SA

S

WING/FI

X

MOD

LOUVER

Check the points described below before asking repair servicing.

Symptom Cause

• White misty cold air or water

Outdoor unit

is out.

• Sometimes, noise of air
leak is heard.

• “Swish” sound is heard
sometimes.

• Slight clacking sound is
heard.

• Discharge air smells. • Various smell such as one of wall, carpet, clothes, cigarette, or cosmetics

Indoor unit

It is not a failure.

• “ ” indication is lit. • When cooling operation cannot be performed because another indoor unit

• “ ” indication is lit. • When the manager of the air conditioner has fixed the operation to COOL

• “ ” indication is lit. • When stopping the fan to prevent cool air blow at starting heating.

• Sound or cool air is output
from the stand by indoor
unit.

• When power of the air conditioner is
turned on, “Ticktock” sound is heard.

• LCD blurs when it is touched. • LCD may temporarily blur by static electricity.

• Fan and louvers of the indoor unit moves
when the unit is not operated.

Operates or stops automatically.

Does not operate.

Check again.

Air is not cooled or warmed sufficiently.

• Fan of the outdoor unit stops automatically and performs defrost
operation.

• Solenoid valve works when defrost operation starts or finishes.

• When the operation has started, during the operation, or immediately after
the operation has stopped, a sound such as water flows may be heard,
and the operation sound may become larger for 2 or 3 minutes
immediately after the operation has started.
They are flowing sound of refrigerant or draining sound of dehumidifier.

• This is sound generated when heat exchanger, etc. expand and contract
slightly due to change of temperature.

adhere to the air conditioner.

performs heating operation.

• Is outdoor temperature out of operation temperature range?

or HEAT, and an operation contrary to the setup operation is performed.

• Since refrigerant is flowed temporarily to prevent stay of oil or refrigerant
in the stand by indoor unit, sound of flowing refrigerant, may be heard or
white steam when other indoor unit operates in HEAT mode, and cold air
in COOL mode may be blow-out.

• Sound is generated when the expansion valve operates when power has
been turned on.

• Intermittent operation of the fan with louvers open is sometimes carried out
for the refrigerant recovery control of unoperated unit.

• Is the timer “ON” or “OFF”?

• Is it a power failure?

• Is the power switch turned off?

• Is the power fuse or breaker blown?

• Has the protective device operated? (The operation lamp goes on.)

• Is the timer “ON”? (The operation lamp goes on.)

• Is outdoor temperature out of operation temperature range?

• Is the air intake or air discharge of the outdoor unit obstructed?

• Are any door or window open?

• Is the air filter clogged with dust?

• Is discharge louver of the indoor unit set at appropriate position?

• Is air selection set to “LOW” “MED”, and is the operation mode set to
“FAN”?

• Is the setup temp. the appropriate temperature?

• Is outdoor temperature out of operation temperature range?

–17–

If any of the following conditions occur, turn off the main power supply switch and immediately contact the dealer:

• Switch operation does not work properly.

• The main power fuse often blows out, or the circuit breaker is often activated.

• A foreign matter or water fall inside the air conditioner.

• When the air conditioner does not operate even after the cause of the protective device activation has been removed.
(The operation lamp and

and a number are displayed on the remote control, also inform a qualified service person of the display content.)

• Any other unusual conditions are observed.

on the remote control are flashing.When and a combination of , , , , or

Confirmation and check

When an error occurred in the air conditioner, the check code and
the indoor unit No. appear on the display part of the remote control.
The check code is only displayed during the operation.
If the display disappears, operate the air conditioner according to the
following “Confirmation of error log” for confirmation.

Confirmation of error log

When an error occurred on the air conditioner, the error
log can be confirmed with the following procedure. (The
error log is stored in memory up to 4 errors.)
The log can be confirmed from both operating status
and stop status.

Procedure Description

When and buttons are pushed simultaneously for 4
seconds or more, the following display appears.
If [ Service check] is displayed, the mode enters in the error
log mode.

1

• [01: Order of error log] is displayed in CODE No. window.

• [Check code] is displayed.

• [Indoor unit address in which an error occurred] is displayed in
UNIT No..

Every pushing of [ / ] button used to set temperature, the error log stored in memory is displayed in
order.

The numbers in CODE No. indicate CODE No. [01] (latest) to [04] (oldest).

2

CAUTION

Do not push button because all the error log of the indoor unit will be deleted.

After confirmation, push button to return to the usual display.

3

T

T

ON / OFF

T

CL

E

UNIT

1. Check the errors according to the above procedure.

2. Ask an authorized dealer or qualified service (maintenance) professional to repair or maintain the air conditioner.

3. More details of the check code are explained in Service Manual.

33-EN 34-EN

EH99943901