MITSUBISHI Air Conditioner User Manual

Air Conditioner

USER’S MANUAL

ORIGINAL INSTRUCTIONS

AIR-CONDITIONER

USER’S MANUAL ENGLISH
AIR-CONDITIONER

MANUEL DE L’UTILISATEUR FRANÇAIS
CLIMATISEUR

ANWENDERHANDBUCH DEUTSCH
KLIMAGERA¨ T

SRR25ZM-W SRR35ZM-W SRR50ZS-W SRR60ZS-W

ISTRUZIONI PER L’USO ITALIANO
CONDIZIONATORE D’ARIA
MANUAL DEL PROPIETARIO ESPAN~ OL
ACONDICIONADOR DE AIRE

GEBRUIKERSHANDLEIDING NEDERLANDS
AIRCONDITIONING

MANUAL DO UTILIZADOR PORTUGUÊS
APARELHO DE AR CONDICIONADO

KULLANIM KILAVUZU TÜRKÇE

RJJ012A005 201901

Thank you for purchasing a MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD. Air-Conditioner. To get the best long-lasting performance, please read and follow this User’s Manual carefully before using your air-conditioner. After reading, please store the Manual in a safe place and refer to it for operational questions or in the event of any irregularities.
Your Air Conditioning product may be marked with this symbol. It means that waste electrical and electronic equipment (WEEE as in directive 2012/19/ EU) should not be mixed with general household waste. Air-conditioners should be treated at an authorized treatment facility for re-use, recycling and recovery and not be disposed of in the municipal waste stream. Please contact the installer or local authority for more information.
This symbol printed in the batteries attached to your Air Conditioning product is information for end-users according to the EU directive 2006/66/ EC article 20 annex II. Batteries, at their end-of-life, should be disposed of separately from general household waste. If a chemical symbol is printed beneath the symbol shown above, this chemical symbol means that the batteries contain a heavy metal at a certain concentration. This will be indicated as follows: Hg:mercury(0.0005%) , Cd:cadmium(0.002%) , Pb:lead(0.004%) Please, dispose of batteries correctly at your local community waste collection or the recycling center.
The emission sound pressure level from each Indoor and Outdoor unit is under 70 dB(A).

ENGLISH

Contents

Safety precautions……………………………………2 Name of each part and its function……………..7 Remote control handling……………………………9 Operation failure with the remote control……..9 Temporary run operation …………………………..9 Installing two air- conditioners in the same room …10 Child Lock……………………………………………..10 Operation and display section for remote control…. 11 Current time setting ……………………………….12 AUTO mode operation…………………………….12 Temperature adjustment during AUTO ………13 FAN SPEED ………………………………………….13 Airflow direction adjustment……………………..13 COOL/HEAT/DRY/FAN mode operation ……14 Air-conditioner operable temperature setting…14 Characteristics of HEAT mode operation …..14 SLEEP TIMER operation…………………………15 OFF-TIMER operation …………………………….15

ON-TIMER operation………………………………16 SLEEP TIMER + ON-TIMER operation ……..16 ON- TIMER + OFF-TIMER operation …………17 WEEKLY TIMER operation………………………18 HIGH POWER/ECONOMY operation ……….22 NIGHT SETBACK operation…………………….23 SILENT operation …………………………………..23 SELF CLEAN operation…………………………..24 Auto restart function ……………………………….24 Tips for effective operation ………………………24 Maintenance ………………………………………….25 Proper installation…………………………………..26 Troubleshooting …………………………………….. 26 Notice …………………………………………………..27 Contact your dealer ………………………………..28 About the Multiple Air-conditioner……………..28 Self diagnosis function…………………………….29

EN-1

Safety precautions

· Before starting to use the system, please read these “Safety precautions” carefully to ensure proper operation of the system.
· When you have read this user’s manual, please keep it safely. If someone else takes over as user, make sure that the manual is also passed on to the new user.

WARNING

Indicates a potentially hazardous situation which, if not avoided, can result in serious consequences such as death or severe injury.

CAUTION

Indicates a potentially hazardous situation which, if not avoided, can result in personal injury or property damage.

Please observe these precautions with great care, since they are essential to your safety. · This unit is designed for 2 types refrigerants (R32 or R410A). See a label on the outdoor unit to
check refrigerant information.
· Symbols which appear frequently in the text have the following meaning:

Strictly prohibited

Observe instructions with great care

Provide proper earthing

The user’s manual should be read carefully.
There is information included in the user’s manual and/or installation manual.
Following precaution is only for R32.

A service personnel should be handing this equipment with reference to the installation manual.

This equipment uses flammable refrigerants. If the refrigerant is leaked, together with an external ignition source, there is a possibility of ignition.

WARNING

· Strict compliance of the domestic laws must · The appliance shall be stored in a well-

be observed when disposing the appliance. ventilated area where the room size

· Do not use means to accelerate the

corresponds to the room area as specified for

defrosting process or to clean, other than

operation.

those recommended by the manufacturer. · The staff in servicing operations must hold

· The appliance shall be stored in a room

the national qualification or other relevant

without continuously operating ignition

qualifications.

sources (for example: open flames, an

· The indoor unit shall be stored in a room that

operating gas appliance or an operating

has a minimum area of 4.0m2.*

electric heater). · Do not pierce or burn.

*This value is for split system. In the case of multi system, see the installation sheet of

· Be aware that refrigerants may not contain an outdoor unit.

odour.

EN-2

Safety precautions

INSTALLATION PRECAUTIONS
WARNING
· The system is for domestic and residential use. If used in severe environments, such as an engineering workplace, the equipment may function poorly.
· The system must be installed by your dealer or a qualified installer. It is not advisable to install the system by yourself, as faulty handling may cause leakage of water, electric shock or fire.
CAUTION
· Do not install it where flammable gas may leak. Gas leaks may cause fire.

· Make sure that an earth leakage breaker is installed.
If you do not install an earth leakage breaker, you may get an electric shock.

· Make sure to install the drain hose properly so that all the water is drained out.
Improper installation may lead to water drop in the room resulting in wet furniture.

· Make sure that the system has been properly earthed.
Earth wire should never be connected to a gas pipe, water pipe, lightning conductor or telephone earth wire. Improper installation of the earth wire may cause an electric shock.

This Product contains fluorinated greenhouse gases. – Do not vent R32 into the atmosphere: R32 is a fluorinated greenhouse gas with a Global Warming
Potential (GWP) = 675. – Do not vent R410A into the atmosphere: R410A is a fluorinated greenhouse gas with a Global
Warming Potential (GWP) = 2088. Refer to a label on outdoor unit for the weight of fluorinated greenhouse gas and CO2 equivalent.

EN-3

Safety precautions

OPERATION PRECAUTIONS

WARNING

· Children shall not play with the

· Cleaning and user maintenance shall

air-conditioner.

not be made by children without

· Do not expose yourself to the cooling supervision.

air for a long period.

· Do not insert anything into the air

This could affect your physical condition outlet.

and cause health problems.

This may cause injury, as the internal fan

rotates at high speed.

· This air-conditioner can be used by children aged from 8 years and above and people with reduced physical, sensory or mental capabilities or lack of experience and knowledge, if they have been given supervision or instruction concerning use of the air-conditioner in a safe way and understand the hazards involved.
· Store the remote control out of reach of children.
Failure to observe this may result in the batteries being swallowed or other accidents.

CAUTION

· Only use approved fuses.

· Do not use for preservation of food,

Use of steel or copper wire instead of an plants or animals, precision devices

approved fuse is strictly prohibited, as it or works of art.

may cause a breakdown or fire.

The system is only intended for use in

· Do not handle the switches with wet ordinary domestic rooms. Any other use

hands.

of the system may damage the quality of

This may cause an electric shock.

food, etc.

· Do not swing from the indoor unit. · Do not place anything containing

If the indoor unit falls down,you may get water, like vases, on top of the unit.

injured.

Water entering the unit could damage the

· Do not place a flammable insecticide insulation and therefore cause an electric

or paint spray near the air-conditioner, shock.

nor spray it directly on the system. · Do not install the air-conditioner

This may result in a fire. · Do not expose any combustion

where the airflow direction is aimed directly at plants or animals.

appliance directly to the air stream of This will damage their health.

the air-conditioner.

· Do not step/sit on the unit nor put

The combustion appliance may

anything on it.

malfunction.

If the unit falls down or things drop from

· Do not wash the air-conditioner with it, people could get hurt.

water.

· After a long period of use, check the

This could cause an electric shock.

unit’s support structure regularly.

Using a high pressure washer may cause If you do not repair any damage right

damage to the aluminum fins, resulting in away, the unit may fall down and cause

performance decrement.

personal injury.

EN-4

Safety precautions

CAUTION

· Do not touch the aluminum fins on the · Do not shut off the power source

heat exchanger.

immediately after stopping the

It may result in injury.

operation.

· Do not place household electrical

Wait at least 5 minutes, otherwise there

appliances or household items under- is a risk of water leakage or breakdown.

neath the indoor or outdoor units. · Do not control the system with main

Condensation falling from the unit may power switch.

stain objects and cause accidents or

It can cause fire or water leakage. In

electrical shock.

addition, the fan can start unexpectedly,

· Do not operate the system without the which can cause personal injury.

air filter.

· Do not pour liquid into the unit and do

It can cause malfunction of the system not put water container on the unit.

due to clogging of the heat exchanger Water entering the unit could damage the

and to locking of drain pump.

insulation and therefore cause an electric

shock.

· If you operate air-conditioner together · Contact your dealer to clean inside

with a combustion appliance, you

the indoor unit, do not attempt to do

must regularly ventilate the indoor air. by yourself.

Insufficient ventilation may cause

The use of a non-approved detergent or

accidents due to oxygen deficiency.

improper washing method may damage

· When you clean air-conditioner, stop the unit’s plastic components and cause

the unit and turn off the power source. leaks. Damage, smoke, or fire may also

Never open the panel while the internal happen if the detergent comes in contact

fan is rotating.

with electrical parts or the unit’s motor.

· Do not place objects near the outdoor · Stop the unit and turn off the power if

unit or allow leaves to gather around you hear thunder or there is a danger

the unit.

of lightning.

If there are objects or leaves around the It may damage the unit.

outdoor unit, small animals may enter · If the power cable becomes damaged,

unit and contact electrical parts and may contact your dealer or a qualified

cause a break-down, smoke or fire.

installer.

If it is not replaced, it may cause a

breakdown or fire.

EN-5

Safety precautions

PRECAUTIONS FOR RELOCATION OR REPAIRS

WARNING
· Do not perform any repairs or modifications by yourself. Consult the dealer if the unit requires repair.
If you repair or modify the unit, it can cause water leaks, electric shocks or fire.

· Consult your dealer for repairs.

· If the air-conditioner fails to cool

Wrong repairs could cause an electric or warm the room, it may have a

shock, fire, etc.

refrigerant leakage. Contact your

· In case the air-conditioner is relocated dealer.

elsewhere, contact your dealer or a If refrigerant needs to be added,

qualified installer.

check with your dealer for proper

Faulty installation may cause water

instructions.

leakage, electric shock, fire, etc.

If the refrigerant comes in contact with

· If you notice anything abnormal (smell the bare skin, it may cause cold injury.

of burning, etc.), stop the system, turn If the refrigerant gas is inhaled

off the power source and consult your excessively, it may cause deterioration

dealer.

of nerve function like dizziness and

Continued use of the system in abnormal circumstances can result in

headache, or deterioration of heart function like irregular heartbeat and heart

malfunctioning, electric shock, fire, etc. palpitation temporarily. If refrigerant unexpectedly leaks from the unit onto

a fan heater, stove, hotplate or other

heat source, harmful gases could be

generated.

EN-6

Name of each part and its function

INDOOR UNIT

Air inlet

Air outlet Air blows out of here.

Accessories

Air filter Removes dust or dirt from the inlet air.

Page 25

Refrigerant piping connection and electric wire

Unit display section (Remote control signal receiver)

Drain hose Drains water from the indoor unit.
Wireless remote control

Page 11

Wireless remote control

Wireless remote control holder

Wood screw × 2 (for remote control holder mounting)

OUTDOOR UNIT

Battery × 2 (R03 (AAA, Micro))
Air inlet (On side & rear surface)

Air outlet Outdoor unit fan

EN-7

Heat exchanger

Name of each part and its function

Unit display section

RUN (HOT KEEP) light (green)

· Illuminates during operation.
· Blinks when airflow stops due to the HOT KEEP’ andCLEAN operation’.

HOT KEEP

1.5 sec. ON
OFF

ON CLEAN operation
OFF

0.5 sec. 3 sec.
1 sec. Page 24

Operation mode invalid

0.5 sec. ON
OFF

0.5 sec.

Page 28

Remote control signal receiver
Unit ON/OFF button This button can be used for turning on/ off the unit when a remote control is not available.
Page 9
TIMER light (yellow) Illuminates during TIMER operation.
HI POWER light (green) Illuminates during HIGH POWER operation.
ECONO light (orange) Illuminates during ECONOMY operation.

NOTE

· Buzzer sound for remote control

When preset temperature 24°C, automatic operation and automatic airflow are selected, the buzzer sound (PIPI) is produced. When turning off the air- conditioner by pressing ON/OFF button (except CLEAN mode), the buzzer sound (PI) is produced. This function is useful for operating the air-conditioner in the darkness.

Air flow setting

Preset temperature

Representative installation examples
Ceiling concealed (side flow) type

Ceiling concealed (downward flow) type

Remote control signal receiver Air outlet (Local arrangements part) Air inlet grill (Local arrangements part)
Air outlet (Local arrangements part) Remote control signal receiver

EN-8

Air inlet grill (Local arrangements part)

Remote control handling

Replacing the batteries
The following cases show exhausted batteries. Replace old batteries with new ones. · Receiving beep is not emitted when a signal is transmitted. · Display fades away.

1 Pull out the cover and take out old batteries.
2 Insert new batteries. R03 (AAA, Micro) x2
Pay attention to the and marks

NOTE
· Do not use old and new batteries together. · Remove the batteries when the remote control is not used for a long period. · The recommended effective period of a battery conforming to JIS or IEC
should be 6 to 12 months with normal use. If used longer, or when an unspecified battery is used, liquid may leak from the battery, causing the remote control to malfunction. · The recommendable effective period is printed on the battery. This may be shorter due to manufacturering time to the unit. However, the battery may still be in working order after expiry of its nominal life.

3 Close the cover. 4 Press the ACL switch with
the tip of a ballpoint pen.
Page 12

When the display shows any abnormal condition, Press the ACL switch with the tip of a ballpoint pen.
Using the remote control holder
The remote control can be attached to a wall or pillar by using a remote control holder. Before installing the remote control, check that the air- conditioner receives the signals properly.
For installing or removing the remote control, move it up or down in the holder.

Warning note for remote control handling

· Do not go near high temperature places, such as an electric carpet or a stove.

Strictly prohibited
· Do not leave the remote control exposed to direct sunlight or other strong lighting.

· Do not drop the remote control. Handle with care.

· Do not put any obstructing obstacles between the remote control and the unit display section.

· Do not spill any liquid on the remote control.

· Do not place heavy objects on the remote control, or step on it.

Operation failure with the remote control

· Are the batteries running down? “Replacing the batteries” above.
Replace the batteries with new ones and retry the operation.

· If the operation fails, operate the unit with temporary operation function. Contact your dealer to have the remote control checked.

Below

Temporary run operation

· The unit ON/OFF button on the unit display section operates ON/OFF temporarily when the remote control is not used. Operation program

· OPERATION MODE : AUTO

· FAN SPEED

: AUTO

· Operation starts by pressing the unit ON/OFF button; it stops if you press

Unit ON/OFF button

the button again.

NOTE
· Do not hold the Unit ON/OFF button down for more than 5 seconds. (Holding it down longer than 5 seconds sets the automatic cooling used during servicing or when relocating the air-conditioner.)
EN-9

Installing two air-conditioners in the same room

When two air-conditioners are installed in the same room, use this setting when the two air-conditioners are not operated with one remote control. Set the remote control and indoor unit.

Setting the remote control

Setting an indoor unit

1 Pull out the cover and take out batteries.
2 Disconnect the switching line next to the battery with wire cutters.
Disconnect

1 Turn off the power source, and turn it on after 1 minute.

2 Point the remote control that was set according to the procedure described on the left side at the unit display section and send a signal by pressing the ACL switch on the remote control.

Since the signal is sent in about 6 seconds after the ACL switch is pressed, point the remote control at the unit display section for some time.

Reception pip

3 Insert batteries. Close the cover.

3 Check that the reception buzzer sound “pip” is emitted from the indoor unit.
At completion of the setting, the indoor unit emits a buzzer sound “pip”. (If no reception tone is emitted, start the setting from the beginning again.)

Child Lock
This function locks the remote control operation to prevent an operation error.

1

Press the SET button for 3 seconds or longer.
is displayed. While Child Lock is set, only the ON/OFF button can be operated.

Releasing procedure
Turn off the light by pressing the SET button for 3 seconds or longer.

NOTE
· While Child Lock is set, the settings of temperature and fan speed cannot be changed. To change the settings, reset Child Lock.

EN-10

Operation and display section for remote control

OPERATION MODE select button Each time the button is pressed, the mode changes.
Page 12,14
TEMPERATURE button This button sets the room temperature.
HI/ECO button This button changes the HIGH POWER/ ECONOMY operation.
Page 22
SILENT button This buttion changes the SILENT operation.
Page 23

Transmission section
ON/OFF (luminous) button Press to start operation, press again to stop.
FAN SPEED button Each time the button is pressed, the fan speed changes.
Page 13
AIR FLOW (UP/DOWN) button This button changes the air flow (up/ down) direction. This button is not used. (Air flow direction adjustment can not be performed.)
Page 13

ON TIMER button This button selects ON TIMER operation.
Page 16
OFF TIMER button This button selects OFF TIMER operation.
Page 15

NIGHT SETBACK button
This button sets NIGHT SETBACK operation.
Page 23
SET/Child Lock button
Use this button to set the timer and Child Lock.
Page 10

WEEKLY button This button switches the WEEKLY TIMER to ON/OFF.
Page 18
CLEAN switch This switch selects the CLEAN operation.
Page 24

SLEEP button
This button selects SLEEP operation. Page 15

[View with the cover opened] · The above illustration shows all controls, but in practice only the relevant parts are shown.

CANCEL button This button cancels the ON timer, OFF timer, and SLEEP operation.
TIMER button This buttions is used for setting the current time and timer function.
PROGRAM button This button sets WEEKLY TIMER.
Page 18
ACL switch Switch for resetting microcomputer.
Page 9
TIME SET UP switch This switch is for setting the time.
Page 12

Display in OFF status The current time, day of the week, and present OPERATING MODE are displayed while the air-conditioner is turned off.

Transmission procedure
When each button on the remote control is pressed with the remote control pointing towards the unit display section, a signal is transmitted. When the air-conditioner receives the signal correctly, it will beep.

Reception pip

EN-11

Current time setting

When inserting the batteries, the current time is automatically set to time setting mode. Mon and 13:00 are displayed as the current time.

Set a correct day of the week and a time.

Example: Set to Sat 10:30.

1

Press the TIME SET UP switch.
Press with the tip of a ballpoint pen, etc. The day of the week display blinks, enabling the setting of a day of the week.

2 Press the ” or (TIMER)” button. (Set to Sat)

3

Press the SET button.
The day of the week display changes from blinking to steady lighting, completing the setting of a day of the week, and the time display blinks. Make sure to press the button within 60 seconds from the last operation in step 2, otherwise the day of the week is not set.

4 Press the ” or (TIMER)” button. (Set to 10:30)

NOTE

5

Press the SET button.
The time display changes from blinking to steady lighting and the setting is complete. Make sure to press the button within 60 seconds from the last operation in step 4, otherwise the time is not set.

· The timer operation works based on the time clock, so please set it correctly.
· The remote control data is reset when the present time is set.

· When the battery of the remote control is replaced or the ACL switch is pressed, the remote control is set to the initial state. Since the WEEKLY TIMER program is not set in the initial state, set the program according to the setting procedure.

AUTO mode operation
Automatically selects the operation mode (COOL, HEAT, DRY) depending on the room temperature when switched on.

1

Press the MODE button.
The mode changes whenever the button is pressed. Set to .

2 Press the ON/OFF button.

NOTE
· In case air is not blowing out during the operation. Page 27

To stop:

Press the ON/OFF button.

AUTO mode can be operated by simply pressing the ON/OFF button.

EN-12

· If you do not want the AUTO mode program, change to COOL, HEAT, DRY or FAN instead of AUTO.
Page 14

· Airflow direction adjustment procedure.

Page 13

Temperature adjustment during AUTO
Air temperature adjustment is possible even during automatic operation. There are 6 levels of adjustment possible with the button or the button.During automatic operation, 24°C is preset both for heating and cooling.
1 Press the” or (TEMP)” button.
When it is a little cold
Press the button. Each time the button is pressed, the switch over occurs in the following order
­6 ­5 ………… ­1 ±0 +1 ………… +6. When +6 is indicated, even if the button is pressed, the indicator does not change.
When it is a little hot Press the button. Each time the button is pressed, the switch over occurs in the following order
+6 +5 ………… +1 ±0 ­1 ………… ­6. When ­6 is indicated, even if the button is pressed, the indicator does not change.
Remote Control display Setting -6 -5 -4 -3 -2 -1 +0 +1 +2 +3 +4 +5 +6 temp.(°C) 18 19 20 21 22 23 24 25 26 27 28 29 30

FAN SPEED
You can choose the fan speed of your air-conditioner without dry mode.

1

Press the FAN SPEED button.
Each time the button is pressed, the fan speed changes.

AUTO

ULo

Lo

Me

Hi

Operation capacity by your choice Set automatically by microcomputer Silent operation Energy-saving operation Standard operation Powerful operation with high capacity

FAN SPEED AUTO ULo Lo Me Hi

NOTE
· When FAN SPEED is changed from Hi to Lo or ULo, the sound of refrigerant flowing may be heard.

Airflow direction adjustment
Adjusting up/down air flow direction
Air flow direction adjustment can not be performed, although a display will be changed if “AIR FLOW” button is pushed.
EN-13

COOL/HEAT/DRY/FAN mode operation

1

Press the MODE button.
Set to a required mode. (Cool), (Heat), (Dry), (Fan)

2 Press the ON/OFF button.

3

Press the TEMP button.
Press or button for the preferred temperature. Recommendation

4

NOTE

· In case air is not blown out, when starting the heating

operation.

Page 27

· The operation mode can also be set or changed when the air-conditioner is not in operation.

Press the FAN SPEED button
Set the fan speed as preferred. A fan speed cannot be set under Dry operation.

To stop:

Press the ON/OFF button.

Air-conditioner operable temperature setting

Use within the following operational range. Operating outside of this range may result in the protection devices being activated, preventing the unit from working.

Cooling operation

Heating operation

Outside temperature Approximately -15 to 46 °C

Approximately -15 to 24 °C

Inside temperature Approximately 18 to 32 °C

Approximately 10 to 30 °C

Inside humidity

Below approximately 80% The long-term use of the unit with a humidity level exceeding 80% may result in condensation forming on the surface of the indoor unit, leading to water drops.

Characteristics of HEAT mode operation

Mechanism and capacity of HEAT mode operation
Mechanism · The unit draws heat from the cold outside air, transfers it to indoors and heats the room. As a characteristic of heat pump system, the
heating capacity reduces when the outside air temperature gets colder. · It may take some time to supply hot air after turning on the air-conditioner. · If the outside temperature becomes extremely low, it would be better to use an additional source of heating.
Defrosting
If the outside temperature becomes low and humidity is high, the heat exchanger in the outdoor unit may frost over, which prevents efficient heating. If this happens, the automatic defrost function is activated and during defrosting the heating operation stops for 5 to 15 minutes during defrosting. · Both indoor and outdoor fans stop and the RUN light blinks slowly (1.5 sec. ON, 0.5 sec. OFF) during defrosting. · The outdoor unit may give off some steam during defrosting. This is to help the defrosting process and is not a defect. · The HEAT operation resumes as soon as defrosting has been completed.
EN-14

SLEEP TIMER operation

The unit will stop automatically after the set time lapses. The set temperature is automatically adjusted according to the lapse time in order to avoid too much cooling or heating.
1 Press the SLEEP button.

Page 17

If it is pressed while the unit is off
SLEEP TIMER operation starts with the previous operation settings, and the airconditioner is turned off after the set time lapses.
If it is pressed while the unit is running
The air-conditioner is turned off after the set time lapses. Every time the button is pressed, the display changes as follows:
… (Units of one hour)
No display (canceled)
Example: You prefer it to stop after 7 hours.

Set to The timer light (yellow) is on.

Changing of set time
Set a new time by pressing SLEEP button.
How to cancel
Press the CANCEL button to turn off the SLEEP display.

· The unit stops after the set time lapses.
NOTE · Cannot be set at the same time with OFF-TIMER.

OFF-TIMER operation

The unit stops automatically when the set time comes. With the air-conditioner turned off, start the operation from Step 1. With the air-conditioner running, start from Step 2. Example: You prefer it to stop 22:30.
1 Press the ON/OFF button.

2

Press the OFF-TIMER button.
OFF-TIMER display is blinking.

3

Press the ” or (TIMER)” button.
Every time the button is pressed, the display is switched in the order of: 0:00 0:10 0:20 … 1:00 1:10 (Units of ten minutes)

Every time the button is pressed, the display is switched in the order of: 0:00 23:50 23:40 … 23:00 22:50 (Units of ten minutes)

4

Set at 22:30.
Press the SET button.
The display changes from blinking to steady lighting and the setting is complete. The timer light (yellow) is on.

Changing of set time
Set a new time by using the OFF-TIMER button.
How to cancel
Press the CANCEL button to turn off the timer display.

NOTE
· The unit stops at the end of the set period of time. · Make sure to press the button within 60 seconds from the last operation
in step 3, otherwise the setting is not completed. · The current time is not displayed during OFF-TIMER operation. · Different from SLEEP TIMER operation, automatic set temperature ad-
justment is not done during OFF-TIMER operation.
EN-15

ON-TIMER operation

Operation starts 5 to 60 minutes before the set time so that the room temperature reaches the optimum temperature at the set time. ON-TIMER operation can be set regardless of whether the air-conditioner is running or not. Example: When the preferred room temperature is required at 8:00.

1

Press the ON-TIMER button.
ON-TIMER display is blinking.

Page 17

2

Press the ” or (TIMER)” button.
Every time the button is pressed, the display is switched in the order of: 0:00 0:10 0:20 … 1:00 1:10 (Units of ten minutes)

Every time the button is pressed, the display is switched in the order of: 0:00 23:50 23:40 … 23:00 22:50 (Units of ten minutes)
Set at 8:00.

3

Press the SET button.
The display changes from blinking to steady lighting and the setting is complete. The timer light (yellow) is on. The operation stops if it is set during operation.

Changing of set time
Set a new time by using the ON-TIMER button.
How to cancel
Press the CANCEL button to turn off the timer display.

NOTE
· Operation starts 5 to 60 minutes before the set time. · The timer light (yellow) goes out at the set time. · Make sure to press the button within 60 seconds from the last operation
in step 2, otherwise the setting is not completed. · The current time is not displayed during ON-TIMER operation. · If the ON/OFF button is pressed after setting the ON-TIMER, the setting
will be canceled.

SLEEP TIMER + ON-TIMER operation
Combined timer operation of SLEEP TIMER and ON-TIMER. Example: When it is required to stop after 3 hours and then start operation at 8:00, near the set temperature.
1 SLEEP TIMER setting
Set by the procedures on page 15.
Set to
2 ON-TIMER operation setting
Set by the above procedure mentioned in ON-TIMER. Set to The setting of the lighting of the timer light (yellow) of this unit is complete.

· After the SLEEP TIMER set time has elapsed, the operation stops, and it starts from 5 to 60 minutes before the ON-TIMER’s set time.
· The timer light is turned off when ON-TIMER set time comes.
Changing of set time
Set a new time by using the SLEEP or ON-TIMER button.
How to cancel
Press the CANCEL button to turn off the timer display.
EN-16

ON-TIMER + OFF-TIMER operation

The timer operations of the combination of ON and OFF-TIMER.

Example: Present time is 21:00. The air-conditioner running. When it is prefered to stop at 22:30, and then start operation at 8:00, near the set temperature.

1

OFF-TIMER operation setting

Set by the procedures on page 15.

Set to

2

ON-TIMER operation setting

Set by the procedures on page 16.

Set to

Timer light (yellow) on the unit display section will light when the setting is completed.
The set time will be displayed on the remote control. The display will change depending on the operational status.
· The air-conditioner stopping.
First the air-conditioner starts running with ON-TIMER. After the air- conditioner stops running with OFF-TIMER.
· The air-conditioner running. First the air-conditioner stops running with OFF-TIMER. After the air-conditioner starts running with ON-TIMER.

NOTE · Timer operation can be set only for next 24 hours.

Changing of set time
Set a new time by using the OFF-TIMER or ON-TIMER button.
How to cancel
Press the CANCEL or ON/OFF button to turn off the timer display.

Comfort Start-up

In ON-TIMER operation, the unit starts the operation a little earlier, so

that the room can approach optimum temperature at ON time. This is so

called “Comfort start-up”.

· Mechanism

The room temperature is

checked 60 minutes before

In COOL operation

the ON time. Depending on

(Stop) Operation starts

the temperature at that time,

the operation starts 5 to 60 minutes before the timer is at ON.

Set temperature

(Operation)

· The function is available for

both COOL and HEAT opera-

tion mode (including AUTO). It

Check the room Set time

does not work for DRY mode.

temp. 60 mins.

before.

SLEEP TIMER
When SLEEP TIMER is selected, the set temperature is automatically adjusted after a while, ensuring that the room is not too cold during cooling or too warm during heating.
· During cooling : The preset temperature is lowered by 1°C at the start of SLEEP operation (when the timer is set). After that, the temperature goes up by 1°C every an hour to become 1°C higher than the present temperature.
· During heating: The preset temperature is lowered by 1°C at the start of SLEEP operation (when the timer is set). After that the temperature becomes 3°C lower in an hour and 6°C lower in two hours than the present temperature.

EN-17

WEEKLY TIMER operation

Up to 4 programs with timer operation (ON-TIMER / OFF-TIMER) are available for each day of the week. Max 28 programs per week are available. Once this has been set, the timer operation will be repeated at the same programs every week unless the WEEKLY TIMER is canceled.

Sample (At cooling season)

: WEEKLY TIMER setting

: MANUAL setting

COOL 27°C

COOL 27°C

AUTO 27°C

COOL 28°C

COOL 28°C COOL 28°C
COOL 28°C

COOL 26°C

COOL 25°C

COOL 28°C

COOL 28°C

COOL 26°C

COOL 27°C

WEEKLY TIMER ON/OFF setting
Switch the WEEKLY TIMER to ON/OFF by using the WEEKLY button.

1

Press the WEEKLY button.

The WEEKLY TIMER becomes effective. Every time the WEEKLY button is pressed, the display is switched in the order of:

(WEEKLY TIMER on)

No display (WEEKLY TIMER off)

When the WEEKLY TIMER is set to ON, the timer light (yellow) of the unit display section is on. When the battery of the remote control is replaced or the ACL switch is pressed, the remote control is set to the initial state. Since the WEEKLY TIMER program is not set in the initial state, set the program according to the setting procedure.

NOTE

· The WEEKLY TIMER is switched to ON/OFF regardless of whether the air- conditioner is running or not.
· The ON-TIMER operation of the WEEKLY TIMER is effective regardless of whether the air-conditioner is running or not. When the ON-TIMER setting time is reached, the remote control operates according to the contents that are set. The remote control display is also switched to the operation contents that are set. The setting can be changed from the remote control after ON- TIMER operation of the WEEKLY TIMER. The following contents can be set by the ON-TIMER. Operation mode, fan speed, temperature, ECONOMY, NIGHT SETBACK, SILENT. Comfort start-up is not performed for WEEKLY TIMER ONTIMER operation.

· OFF-TIMER operation of the WEEKLY TIMER is effective only when the air- conditioner is running. When the time set by the OFF-TIMER is reached, the air-conditioner stops.
· When multiple program numbers are set for the current day (day of the week), the operation is performed from the earliest time that is set.
· When various timers (ON-TIMER, OFF-TIMER, and SLEEP TIMER) are operating, the WEEKLY TIMER does not operate even if the time set in the ON-TIMER or OFF- TIMER is reached. The WEEKLY TIMER becomes effective after various timers are terminated.
· The ON-TIMER or OFF-TIMER of the same time in the same day of the week cannot be set.
· In case of the WEEKLY TIMER being not sent in the remote
control, the TIMER light is not on even if the WEEKLY button
is pressed and is displayed on the remote control.

EN-18

Setting mode

Set after setting the current day of the week and the time.

1

Press the PROGRAM button.
and current day of the week blink.

2

Press the ” or (TIMER)” button.
Select a day of the week to be reserved. Every time the button is pressed, the display is switched in the order of:
Mon Tue Wed … Sun Display of all of the days of the week
Every time the button is pressed, the display is switched in the order of:
Mon Display of all of the days of Sun Sat … Tue the week

3

Press the SET button.
The day of the week is determined and the program number blinks.

4

Press the ” or (TIMER)” button.

Select a program number. Every time the button is pressed, the display is switched in the order of:

P1

P2

P3

P4

Every time the the order of:
P1

button is pressed, the display is switched in

P4

P3

P2

5

Press the SET button.
When no set contents (ON-TIMER or OFF-TIMER) are available, both the and timers blink.

When set contents (ON-TIMER or OFF-TIMER) are available, either one of or is lit.

6

Press the ON-TIMER or OFF-TIMER button.
ON-TIMER or OFF-TIMER is determined and time display blinks. ON-TIMER is selected OFF-TIMER is selected

EN-19

7

Press the ” or (TIMER)” button.
Set a time. Every time the button is pressed, the display is switched in the order of:
0:00 0:10 0:20 … 1:00 1:10 (Units of ten minutes)

Every time the button is pressed, the display is switched in the order of:
0:00 23:50 23:40 … 23:00 22:50 (Units of ten minutes)
When ON-TIMER is selected, go to Step 8. When OFF-TIMER is selected, go to Step 9.

8

Set required operation contents.
When ON-TIMER is selected, operation mode and fan speed can be changed and the ECONO, SILENT or NIGHT SETBACK operation can be set.

9

Press the SET button.
The time is determined and and blink.

10

Press the PROGRAM button or SET button.
When the PROGRAM button is pressed, the setting is sent to the air- conditioner. Since it takes 3 seconds for transmission, point the remote control at the unit display section during the period. When the setting is received, a buzzer sound (pip, pip, pip) is emitted. When the SET button is pressed, the setting continues from Step 2.

Setting mode
Set the same operation contents to the same program number of all the days of the week. In Step 2 above, select “all of the days of the week”. When the contents that were individually set exist in the same program number, the contents are overwritten.
NOTE
· If no operation is performed for 60 seconds in setting mode, the setting changes that have been made until then become invalid and the setting mode terminates. Subsequently, and all the program numbers (P1, P2, P3 and P4) blink for 10 seconds. (This blinking can not be observed if setting mode gets terminated while setting only one program.)
· At the end of the setting mode, point the remote control at the unit display section and press the PROGRAM button. In this case, check that the air- conditioner emits a reception buzzer sound three times (pip, pip, pip). If the buzzer sound is not emitted, set the mode to the setting mode again by pressing the PROGRAM button and check that the buzzer sound is emitted.

EN-20

How to cancel the setting

1

Press the PROGRAM button.
and current day of the week blink.

2

Press the ” or (TIMER)” button.
Select a day of the week to be canceled.

3

Press the SET button.
The day of the week is determined and the program number blinks.

4

Press the ” or (TIMER)” button.
Select a program number to be canceled. At cancelation operation, do not press the SET button. If the SET button is pressed, the mode is shifted to the Set mode.

5 Press the CANCEL button.

The setting contents of the ON or OFF-TIMER are canceled and

is

displayed on the time display section.

6

Press the PROGRAM button.
When the PROGRAM button is pressed, the setting is sent to the airconditioner. When the setting is received, a buzzer sound (pip, pip, pip) is emitted. The setting contents of each program are canceled. Perform the operation indicated above for each program to be canceled.

How to cancel the setting

When the same operation contents exist in the same program number of all the days of the week, collective erase is allowed. In Step 2 above, select “all of the days of the week”. The procedure from Step 3 is the same as that indicated above.
If the operation contents have been changed or erased by individual setting after the collective setting described in page 20, causing setting content discrepancies among the days of the week, collective erase is not allowed.

Confirm mode

The WEEKLY TIMER setting contents can be confirmed.

1

Press the PROGRAM button for 3 seconds or more.
blinks and the setting content lights.

2

Press the ” or (TIMER)” button.

Select a day of the week and a program number to be confirmed.

Display starts from the current day of the week. For the program without set-

ting,

is displayed. When the PROGRAM button is pressed in Confirm

mode, a setting mode is set.

Mon

P1

P2

P3

P4

Tue

P1

P2

P3

P4

Sun

P1

P2

P3

P4

Display of all of the days of the week

P1

P2

P3

P4

Releasing procedure
The Confirm mode can be terminated by pressing the ON/OFF, CANCEL or SET button.

NOTE
· If no operation is performed for 60 seconds in Confirm mode, the Confirm mode is terminated.
EN-21

HIGH POWER/ECONOMY operation

1 Press the ON/OFF button.

2

Press the HI/ECO button.

· When the operating mode is AUTO, COOL or HEAT Every time the HI/ECO button is pressed, the display is switched in the order of:

(HIGH POWER) (ECONOMY)

No display (Normal operation)

· When the operating mode is DRY or ON-TIMER + OFF-TIMER Every time the HI/ECO button is pressed, the display is switched in the order of:

(ECONOMY)

No display (Normal operation)

HIGH POWER operation
Pressing the HI/ECO button intensifies the operating power and initiates powerful cooling or heating operation for 15 minutes continuously. The remote control displays and the FAN SPEED display disappears.

NOTE

· During the HIGH POWER operation, the room temperature is not controlled. When it causes an excessive cooling or heating, press the HI/ECO button again to cancel the HIGH POWER operation.
· HIGH POWER operation is not available during the DRY and ON-TIMER + OFF- TIMER operations.
· When HIGH POWER operation is set after setting ON-TIMER operation, HIGH POWER operation will start from the set time.
· After HIGH POWER operation, the sound of refrigerant flowing may be heard.

· When the following operations are set, HIGH POWER operation will be canceled. 1 When the HI/ECO button is pressed again. (The operation mode will be changed to the ECONOMY operation.) 2 When the operation mode is changed. 3 When it has been 15 min. since HIGH POWER operation has started. 4 When the SILENT button is pressed. 5 When the NIGHT SETBACK button is pressed.
· Not operable while the air-conditioner is OFF.

ECONOMY operation
Pressing the HI/ECO button initiates a soft operation with the power suppressed in order to avoid an excessive cooling or heating. The unit operates 1.5°C higher than the setting temperature during cooling or 2.5°C lower than that during heating. The remote control displays and the FAN SPEED display disappears.

NOTE
· It will go into ECONOMY operation at the next time the airconditioner runs in the following case. 1 When the air-conditioner is stopped by ON/OFF button during ECONOMY operation. 2 When the air-conditioner is stopped in SLEEP or OFF TIMER operation during ECONOMY operation. 3 When the operation is retrieved from CLEAN operation.

· When the following operations are set, ECONOMY operation will be canceled. 1 When the HI/ECO button is pressed again. 2 When the operation mode is changed from DRY to FAN. 3 When the NIGHT SETBACK button is pressed.
· Not operable while the air-conditioner is OFF.

EN-22

NIGHT SETBACK operation

During the cold season, the room temperature can be maintained at a comfortable level during the absence, at night, and while the room is unattended. The air-conditioner maintains the constant temperature at about 10°C.

1

Press the NIGHT SETBACK button.
Every time the NIGHT SETBACK button is pressed, the display is switched in the order of:

(NIGHT SETBACK on)

No display (NIGHT SETBACK off)

Releasing procedure
Press the NIGHT SETBACK button or MODE button to turn off the NIGHT SETBACK display.

NOTE
· During NIGHT SETBACK operation, the air-conditioner maintains the set temperature at about 10°C.
· During NIGHT SETBACK operation, temperature settings cannot be made.
· Since the room temperature may change quite a bit, it is recommended that this be used when no one is in the room.
· During NIGHT SETBACK operation, HIGH POWER and ECONOMY operations cannot be set.
· When NIGHT SETBACK operation is canceled by pressing the NIGHT SETBACK button, the operation mode is reset to the mode immediately prior to the NIGHT SETBACK operation.

SILENT operation
When the SILENT operation is set, the unit operates more silently reducing noise from the outdoor unit. With the air-conditioner turned off, start the operation from Step 1. With the air-conditioner running, start from Step 2.

1 Press the ON/OFF button.

2

Press the SILENT button.
· When the operating mode is AUTO, COOL, HEAT or NIGHT SETBACK Every time the SILENT button is pressed, the display is switched in the order of:

(SILENT on)

No display (SILENT off)

Releasing procedure
Press the SILENT button to turn off the SILENT display.
NOTE
· During SILENT operation, the maximum cooling and heating capacities deteriorate.
· SILENT operation will not function during DRY and FAN operation. · In case of following operations, the air-conditioner will resume SILENT
operation whenever it turns ON again. 1 When the air-conditioner is stopped by ON/OFF button during SILENT
operation. 2 When the air-conditioner is stopped in SLEEP or OFF-TIMER op-
eration during SILENT operation. 3 When the operation is retrieved from CLEAN operation. · Not operable while the air-conditioner is OFF. · The noise level of the outdoor unit may not decrease depending on the condition. · In case of SCM multi system, SILENT control function is invalid.
EN-23

SELF CLEAN operation

CLEAN operation should be run after AUTO, COOL and DRY operation to remove the moisture from inside the indoor unit and control the growth of mold and bacteria.

1

In order to active CLEAN operation, press the CLEAN switch with the tip of a ballpoint pen.

Every time the CLEAN switch is pressed, the display is switched in the order of:

(CLEAN on)

No display (CLEAN off)

NOTE

· Two hours later, the air-conditioner stops CLEAN operation automatically. To stop the air-conditioner immediately, press the ON/OFF button.
· CLEAN operation is not operated after HEAT, FAN, OFF-TIMER and SLEEP operations have finished.
· The indoor unit fan runs for about two hours in CLEAN operation. · The RUN light illuminates during CLEAN operation.
3 sec. ON

OFF

1 sec.

· Pressing the SLEEP button or NIGHT SETBACK button during CLEAN operation cancels the CLEAN operation and then the unit is set to SLEEP or NIGHT SETBACK operation.
· This is not a function for removing mold, germs or grime that have already adhered to the unit.

Auto restart function
What is auto restart function?
· Auto restart function records the operational status of the air-conditioner immediately prior to be switched off by a power cut, and then automatically resumes operations after the power has been restored.
· The following settings will be canceled: 1 Timer settings 2 HIGH POWER operations
NOTE
· Auto restart function is set at on when the air-conditioner is shipped from the factory. Consult with your dealer if this function needs to be switched off.
· When power failure occurs, the timer setting is canceled. Once power is resumed, set the timer again.

Tips for effective operation

Please observe the following for the most economic and comfortable use of your unit.
Set a suitable room temperature. Clean the filters frequently.

Excessively high or low temperatures are not good for your health and waste of electricity.
According to handling directions of local arrangements part, adjust the airflow direction properly.
Adjust the up/down and left/right airflow to ensure a steady room temperature. Air flow direction adjustment can not be performed by unit.

Clogged filters may block the airflow and cause less efficient operation. Please request cleaning of the air filter from special contractor.
Operate the unit only when needed.
Use the timer properly to operate the unit only when needed.

Avoid direct sunlight and draught.
Cut out direct sunlight by drawing the curtains or blinds when cooling. Keep windows and doors shut, except when ventilating.
Keep heat source away when cooling.
Keep heat sources out of the room as much as possible.

EN-24

Maintenance

Before maintenance

Turn off the power source.

Do not spill any liquid.
· There’s a danger of electric shock.
· Wipe the unit with a soft, dry cloth.
Do not touch the aluminum fins on the heat exchanger.

Do not use the following articles:
· Hot water (40°C or more) It may deform or discolour the unit.
· Petrol, paint thinner, benzine or cleanser, etc. They may deform or scratch the unit.

During the operational season
Cleaning the air filter
Please request cleaning of the air filter from special contractor.

NOTE
· The air filter that comes with the unit cannot be washed with water. · Cooling/heating is affected by an air filter clogged up with dust etc., and the operation noise becomes louder. It may also use
extra electricity. Please clean the air filter at appropriate intervals.

At the end of the season

1 Perform the fan operation for 2 to 3 hours.
Dry the inside of the unit.

2

Stop the unit and turn off the power source.
The unit consumes approx. 2W even when the unit is not operating. Turning off the power source will help saving energy consumption and cost.

3 Clean and reinstall the air filters.

• The air filter that comes with the unit cannot be washed with water.

4 Remove batteries from the remote control.

At the beginning of the season
1 Ensure that the earth wiring is not snapped nor disconnected.
2 Check if there is no corrosion or rust on the base frame of the outdoor unit.
3 Make sure that there are no obstacles blocking the airflow around the air intake and outlet openings of the indoor and outdoor units.
4 Turn on the power source.
5 Insert batteries in the remote control.

EN-25

Proper installation

Suitable installation position
· Do not put any obstruction in front of the indoor unit, preventing proper ventilation and functioning. · Do not install the unit in any of the following places:
· Where there is a danger of leaking flammable gases. · Where there is substantial splashing of oil. · Malfunctioning due to corrosion may occur if the unit is installed in a spa where sulfide gases are generated, or in a seaside resort exposed to sea breezes. Contact your dealer. · The air- conditioner and remote control must be at least 1 meter away from a TV set or radio. · Drain the dehumidified liquid from the indoor unit into a spot that drains well.
Pay attention to operating noises!
· When you install the unit, take care to choose a place that can comfortably stand the weight of the unit and does not increase the operating noise or vibration. If vibration is transmitted through the house, fix the unit with the aid of vibration-proof pads between the unit and the fittings.
· Select a place where cold or hot air, operation noises from the indoor and outdoor units do not cause any inconvenience to your neighbours.
· Do not leave any obstacles near the outlet and inlet of the outdoor unit. This may cause malfunctioning and increased operating noise.
· If you hear an irregular noise during operation, contact your dealer.
Inspection and maintenance
Depending on operating environment, the inside of the air-conditioner may become dirty after a few year operations. This will reduce performance. In addition to normal cleaning, we would recommend inspection and maintenance. (This may lead the air-conditioner to having a longer life without any trouble.) · Contact your dealer, or any distributor, for inspection and maintenance. (There will be a charge for this service). · We would recommend inspection and maintenance to be carried out during the off-season. · If the supply cord of this appliance is damaged, it must only be replaced by a repair shop appointed by the manufacturer, because
special purpose tools are required.

Troubleshooting

Please carry out the following checks before making a service call.
The air-conditioner does not work at all.

Has the power switch been turned off?

Has the timer been set in the “ON” position?

Is there a power failure or a blown fuse?

If the air-conditioner does not operate properly after you have checked the left points, or if any doubt still exists after you have consulted page 27, or if things happen as shown on page 28, switch off the power and contact your dealer.

Have you set the thermostat at a suitable temperature?
suitable temperature

Poor cooling or heating
Is the air filter clean? (Not clogged?)

Did you leave any doors or windows open?

Is there any direct sunlight entering the room?

Poor cooling
Is there a heat source in the room?

Are there too many people in the room?

EN-26

Notice

Air flow

Airflow is not blown out when starting the HEATING operation.
RUN light blinks slowly (1.5 sec ON, 0.5 sec OFF)
Airflow is not blown out for 5 to 15 min. or blown out not warm wind for a moment at HEATING operation.
RUN light blinks slowly (1.5 sec ON, 0.5 sec OFF)
Airflow is not blown out when starting the DRY operation.
(RUN light is on)

Airflow has stopped to prevent blowing out of cold air until the indoor heat exchanger has warmed up. (2 to 5 min.) (HOT KEEP program)
When outdoor temperature is low and humidity is high, the unit sometimes performs defrosting automatically. Please wait. During defrosting, water or steam may escape from the outdoor unit.
The indoor fan may stop to prevent re-evaporation of dehumified moisture and to save energy.

Noise

You hear a slight gurgling sound. You hear a slight cracking sound. You hear a hissing or clicking sound.
Whistling noise is heard from the outdoor unit.
Sometimes a “Shooooo” sound might come for a short time from the unit that is turned off.

This is caused by refrigerating liquid moving within the unit.
This is caused by heat expansion or contraction.
This is caused by the operation of the refrigerant control valves or electric components.
The noise means that the revolution speed of the compressor is increasing or decreasing.
This is the sound when operation of another indoor unit is stopped.

Others

The unit does not restart immediately after you have stopped it.
(RUN light is on)
Not operating?

Restart is blocked for 3 minutes after you have stopped the operation to protect the unit.
Please wait for three minutes.

Some steam escapes during COOL operation.
There is a slight smell. After a power cut, the unit does not restart even if power has been restored. Remote control signals are not received.
Moisture may form on the air outlet grills. Fan will not stop immediately after unit operation was stopped.
RUN light stays on even though operation was stopped.

The three-minute protection timer in the microcomputer automatically starts it up again.
This may occur if the room’s temperature and humidity are very high. It disappears as soon as the temperature and humidity decrease.
Air blown out during operation may smell. This is caused by tobacco or cosmetics adhering to the unit.
If the auto restart function is not set, the unit will not restart automatically. Use the remote control to start the operation again.
Remote control signals may not be received if the unit display section is exposed to direct sunlight or other bright light. If so, cut out the sunlight or reduce the other light.
If the unit is operated for a long time in high humidity, moisture may form on the air outlet grills and start dripping.
Indoor fan : Fan will not stop after 2 hours if set to CLEAN operation.
Outdoor fan : Fan will not stop about a 1 minute period in order to protect the unit.
The RUN light illuminates during CLEAN operation. Run light turns off when CLEAN operation ends.

EN-27

Contact your dealer

Turn off the power switch immediately and inform your dealer in any of the following situations:

The fuse or switch blows continuously.

The cable becomes extremely hot. The covering of the cable is cracked.

Fuse often blows.

CAUTION
If the power cord becomes damaged, ask your dealer or a qualified engineer to install the replacement to avoid accidents.

The TV, radio or other equipment starts to malfunction.

A switch does not activate properly.

You hear a strange noise during operation.

When the foreign matters enter the indoor unit through the air outlets and the dumper becomes inoperable, call your dealer.

The RUN and TIMER lights on the unit display section blink quickly (0.5 sec. ON; 0.5 sec. OFF) and do not work.

When abnormalities occur, turn off the power source immediately and turn it on after 3 minutes. Restart the operation with ON/OFF button of the remote control and the abnormalities still continue.

About the Multiple Air-conditioner
Simultaneous operation
· The air-conditioners cannot be in different operating modes at the same time, such as one unit being in the “Cool” mode and one unit being in the “Heat” mode.
· When conducting different operations, the air-conditioner that was operated first will be given priority, so the air-conditioner that is operated after that will conduct air blowing operation.
· When you want to give priority to the air-conditioner that was started later, either stop the air-conditioner that has priority or cause the operation type of the unit operated first to match that of the unit operated second.
· When other indoor units are operating in different modes, the RUN light illuminates. 0.5 sec.
ON
OFF 0.5 sec.
Automatic operation
· When the remote control operation switch is in the “AUTO” mode the air- conditioner automatically selects either “COOL,” “DRY,” or “HEAT” when operation is started depending on the room temperature.
· During simultaneous operation of air-conditioner units, operation modes may be automatically changed in response to the temperatures of the individual rooms; this will result in the operation of the outdoor unit being stopped. In such a case, COOL or HEAT mode should be used instead of AUTO. (This is only relevant when more than one air-conditioner unit is being used.)
Refrigerant (oil) recovery operation
· If the all of the indoor units are not operated at the same time for an extended period, the cooling or heating performance may temporarily decrease. This is in order to control the recovery of the refrigerant (oil) in the stopped indoor unit(s). At this time, the sound of refrigerant flowing may be heard from the stopped indoor unit(s).

EN-28

Self diagnosis function

We are constantly trying to do better service to our customers by installing such judges that show abnormality of each function as follows:

RUN light 1-time flash

Description of trouble Heat exchanger sensor 1 error

Cause
· Broken heat exchanger sensor 1 wire, poor connector connection

TIMER light ON

2-time flash 3-time flash 4-time flash

Room temperature sensor error Heat exchanger sensor 3 error Drain error

· Broken room temperature sensor wire, poor connector connection
· Broken heat exchanger sensor 3 wire, poor connector connection
· Drain at reverse gradient · Float switch defective

5-time flash

Active filter voltage error

· Defective outdoor unit boards

6-time flash 7-time flash TIMER light

Indoor fan motor error
Refrigerant is insufficient Closed service valve Heat exchanger sensor 1 error

· Defective fan motor, poor connector connection
· Refrigerant is insufficient, leaking · Closed serice valve · Broken heat exchanger sensor 1 wire, poor connector
connection

RUN light keeps flashing

1-time flash 2-time flash 4-time flash 5-time flash

Outdoor temperature sensor error

· Broken outdoor sensor wire, poor connector connection

Outdoor heat exchanger fluid pipe sensor error

· Broken heat exchanger fluid pipe sensor wire, poor connector connection

Discharge pipe sensor error

· Broken discharge pipe sensor wire, poor connector connection

Suction pipe sensor error

· Broken suction pipe sensor wire, poor connector connection

RUN light ON
RUN light 2-time flash RUN light 7-time flash

1-time flash 2-time flash 3-time flash 4-time flash 5-time flash 6-time flash 7-time flash Keep flashing
2-time flash
1-time flash

Current cut Trouble of outdoor unit Over current

· Compressor locking, open phase on compressor output, shortcircuit on power transistor, closed service valve
· Broken power transistor, broken compressor wire · Broken discharge pipe sensor wire, poor connector connection · Compressor blockage
· Overload operation, overcharge of refrigeration

Power transistor error Over heat of compressor Error of signal transmission Outdoor fan motor error

· Broken power transistor
· Gas shortage, defective discharge pipe sensor, closed service valve
· Defective power source, Broken signal wire, defective in/outdoor unit boards
· Defective fan motor, poor connector connection

Cooling high pressure protection · Overcharge of refrigeration, short circuit of outdoor unit

Rotor lock

· Defective compressor · Open phase on compressor · Defective outdoor unit boards

Closed service valve

· Closed serice valve

EN-29

MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
16-5 Konan 2-chome, Minato-ku, Tokyo, 108-8215, Japan http://www.mhi- mth.co.jp/en/
MITSUBISHI HEAVY INDUSTRIES AIR-CONDITIONING EUROPE, LTD.
5 The Square, Stockley Park, Uxbridge, Middlesex, UB11 1ET, United Kingdom Tel : +44-333-207-4072 Fax: +44-333-207-4089 http://www.mhiae.com/
MITSUBISHI HEAVY INDUSTRIES AIR-CONDITIONERS AUSTRALIA, PTY. LTD.
9C Commercial Road Kingsgrove NSW 2208 PO BOX 318 Kingsgrove NSW 1480 Tel : +61-2-8571-7977 Fax: +61-2-8571-7992 http://www.mhiaa.com.au

References

• PRODUCT WEBSITE | MITSUBISHI HEAVY INDUSTRIES THERMAL SYSTEMS, LTD.
• Mitsubishi Heavy Industries Air-Conditioners Australia

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