Daikin FDXS25E7VMB User manual

FDXS25E7VMB FDKS25E7VMB
FDXS35E7VMB FDKS35E7VMB
FDXS50C7VMB FDKS50C7VMB
FDXS60C7VMB FDKS60C7VMB
DAIKIN ROOM AIR CONDITIONER
Operation Manual

1
CONTENTS
READ BEFORE OPERATION
Safety precautions ......................................... 2
Names of parts............................................... 4
Preparation Before Operation ........................ 7
OPERATION
AUTO · DRY · COOL · HEAT · FAN
Operation ..................................................... 10
POWERFUL Operation ................................ 12
OUTDOOR UNIT QUIET Operation............. 13
HOME LEAVE Operation ............................. 14
TIMER Operation ......................................... 16
Note for Multi System................................... 18
CARE
Care and Cleaning ....................................... 20
TROUBLE SHOOTING
Trouble Shooting.......................................... 22
The original instructions are written in English. All other languages are translations of the original instructions.

2
READ BEFORE OPERATION
Safety precautions
• Keep this manual where the operator can easily find them.
• Read this manual attentively before starting up the unit.
• For safety reason the operator must read the following cautions carefully.
• This manual classifies precautions into WARNING and CAUTION. Be sure to follow all precautions below: they are all
important for ensuring safety.
WARNING
• In order to avoid fire, explosion or injury, do not operate the unit when harmful, among which flammable or
corrosive gases, are detected near the unit.
• It is not good for health to expose your body to the air flow for a long time.
• Do not put a finger, a rod or other objects into the air outlet or inlet. As the fan is rotating at a high speed, it will
cause injury.
• Do not attempt to repair, relocate, modify or reinstall the air conditioner by yourself. Incorrect work will cause electric
shocks, fire etc.
For repairs and reinstallation, consult your Daikin dealer for advice and information.
• The refrigerant used in the air conditioner is safe. Although leaks should not occur, if for
some reason any refrigerant happens to leak into the room, make sure it does not come in
contact with any flame as of gas heaters, kerosene heaters or gas range.
• If the air conditioner is not cooling (heating) properly, the refrigerant may be leaking, so call your dealer.
When carrying out repairs accompanying adding refrigerant, check the content of the repairs with our service staff.
• Do not attempt to install the air conditioner by your self. Incorrect work will result in water leakage, electric shocks or
fire. For installation, consult the dealer or a qualified technician.
• In order to avoid electric shock, fire or injury, if you detect any abnormally such as smell of fire, stop the operation and
turn off the breaker. And call your dealer for instructions.
• Depending on the environment, an earth leakage breaker must be installed. Lack of an earth leakage breaker may
result in electric shocks or fire.
• The air conditioner must be earthed. Incomplete earthing may result in electric shocks. Do not connect the
earth line to a gas pipe, water pipe, lightning rod, or a telephone earth line.
CAUTION
• In order to avoid any quality deterioration, do not use the unit for cooling precision instruments, food, plants,
animals or works of art.
• Never expose little children, plants or animals directly to the air flow.
WARNING
If you do not follow these instructions exactly, the unit may
cause property damage, personal injury or loss of life.
CAUTION
If you do not follow these instructions exactly, the unit may
cause minor or moderate property damage or personal injury.
Never do. Be sure to follow the instructions.
Be sure to earth the air conditioner. Never cause the air conditioner (including the remote
controller) to get wet.
Never touch the air conditioner (including the remote
controller) with a wet hand.

3
• Do not place appliances which produce open fire in places exposed to the air flow from the unit or under the indoor
unit. It may cause incomplete combustion or deformation of the unit due to the heat.
• Do not block air inlets nor outlets. Impaired air flow may result in insufficient performance or trouble.
• Do not stand or sit on the outdoor unit. Do not place any object on the unit to avoid injury, do not remove the fan guard.
• Do not place anything under the indoor or outdoor unit that must be kept away from moisture. In certain conditions,
moisture in the air may condense and drip.
• After a long use, check the unit stand and fittings for damage.
• Do not touch the air inlet and alminum fins of outdoor unit. It may cause injury.
• This appliance is not intended for use by persons, including children, with reduced physical, sensory or mental
capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning
use of the appliance by a person responsible for their safety.
Children shall be supervised to ensure that they do not play with the appliance.
• To avoid oxygen deficiency, ventilate the room sufficiently if equipment with burner is used together with the
air conditioner.
• Before cleaning, be sure to stop the operation, turn the breaker off or pull out the supply cord.
• Do not connect the air conditioner to a power supply different from the one as specified. It may cause
trouble or fire.
• Arrange the drain hose to ensure smooth drainage. Incomplete draining may cause wetting of the building, furniture etc.
• Do not place things that must be kept dry under the indoor unit. Water may drip from the indoor unit if the humidity is
80% or above or when the drain outlet is clogged or the air-filter is dirtied.
• Do not place objects in direct proximity of the outdoor unit and do not let leaves and other debris accumulate around the unit.
Leaves are a hotbed for small animals which can enter the unit. Once in the unit, such animals can cause
malfunctions, smoke or fire when making contact with electrical parts.
• Do not operate the air conditioner with wet hands.
• Do not wash the indoor unit with excessive water, only use a slightly wet cloth.
• Do not place things such as vessels containing water or anything else on top of the unit. Water may
penetrate into the unit and degrade electrical insulations, resulting in an electric shock.
■ To install the air conditioner in the following types of environments, consult the dealer.
• Places with an oily ambient or where steam or soot occurs.
• Salty environment such as coastal areas.
• Places where sulfide gas occurs such as hot springs.
• Places where snow may block the outdoor unit.
The drain from the outdoor unit must be discharged to a place of good drainage.
■For installation, choose a place as described below.
•
A place solid enough to bear the weight of the unit which does not amplify the operation noise or vibration.
•A place from where the air discharged from the outdoor unit or the operation noise will not annoy
your neighbours
.
• For power supply, be sure to use a separate power circuit dedicated to the air conditioner.
• Relocating the air conditioner requires specialized knowledge and skills. Please consult the dealer if
relocation is necessary for moving or remodeling.
Installation site.
Consider nuisance to your neighbours from noises.
Electrical work.
System relocation.

4
Names of parts
■Indoor Unit
3
6
8
9
10
7
1
45
2

5
■Outdoor Unit
■ Indoor Unit
1. Air outlet
2. Air outlet grille: (Field supply)
•
Appearance of the Air outlet grille and Air inlet
grille may differ with some models.
3. Receiver
4. Suction grille: (Option)
•
Appearance of the suction grille and Air inlet
grille may differ with some models.
5. Air inlet
6. Room temperature sensor:
•
It senses the air temperature around the unit.
7. Operation lamp (green)
8. TIMER lamp (yellow): (page 16.)
9. HOME LEAVE lamp (red):
•
Lights up when you use HOME LEAVE
operation. (page 14.)
10. Indoor Unit ON/OFF switch:
•
Push this switch once to start operation.
Push once again to stop it.
• This switch is useful when the remote controller
is missing.
• The operation mode refers to the following table.
■ Outdoor Unit
11. Air inlet: (Back and side)
12. Refrigerant piping and inter-unit cable
13. Drain hose
14. Earth terminal:
•It is inside of this cover.
15. Air outlet
Appearance of the outdoor unit may differ from some models.
12
13
14
15
11
Mode Temperature
setting
Air flow
rate
FDKS COOL 22°CAUTO
FDXS AUTO 25°CAUTO

6
■Remote Controller
1. Signal transmitter:
•
It sends signals to the indoor unit.
2. Display:
•It displays the current settings.
(In this illustration, each section is shown
with all its displays ON for the purpose of
explanation.)
3. HOME LEAVE button:
HOME LEAVE operation (page 14.)
4. POWERFUL button:
POWERFUL operation (page 12.)
5. TEMPERATURE adjustment buttons:
•It changes the temperature setting.
6. ON/OFF button:
•Press this button once to start operation.
Press once again to stop it.
7. MODE selector button:
•It selects the operation mode.
(AUTO/DRY/COOL/HEAT/FAN) (page 10.)
8. QUIET button: OUTDOOR UNIT
QUIET operation (page 13.)
9. FAN setting button:
•It selects the air flow rate setting.
10. ON TIMER button: (page 17.)
11. OFF TIMER button: (page 16.)
12. TIMER Setting button:
•It changes the time setting.
13. TIMER CANCEL button:
•It cancels the timer setting.
14. CLOCK button: (page 9.)
15. RESET button:
•Restart the unit if it freezes.
•Use a thin object to push.
1
2
5
6
9
13
15
14
10
12
11
< ARC433B69, B76 >
3
4
7
8

7
Preparation Before Operation
■To set the batteries
1. Slide the front cover to take it off.
2. Set two dry batteries AAA.LR03
(alkaline).
3. Set the front cover as before.
ATTENTION
■ About batteries
• When replacing the batteries, use batteries of the same type, and replace the two old batteries
together.
• When the system is not used for a long time, take the batteries out.
•The batteries will last for approximately one year. If the remote controller display begins to
fade and the degradation of reception performance occurs within a year, however, replace
both two batteries with new size AAA.LR03(alkaline).
•
The attached batteries are provided for the initial use of the system.
The usable period of the batteries may be short depending on the manufactured date of the air
conditioner.
2
3
1
Position +and
– correctly!

8
Preparation Before Operation
■To operate the remote
controller
•To use the remote controller, aim the transmitter
at the indoor unit. If there is anything to block
signals between the unit and the remote
controller, such as a curtain, the unit will not
operate.
•
Do not drop the remote controller. Do not get it wet.
•The maximum distance for communication is
about 4m.
■To fix the remote controller
holder on the wall
1. Choose a place from where the
signals reach the unit.
2. Fix the holder to a wall, a pillar, etc.
with the screws supplied with the
holder.
3. Place the remote controller in the
remote controller holder.
ATTENTION
■ About remote controller
• Never expose the remote controller to direct sunlight.
• Dust on the signal transmitter or receiver will reduce the sensitivity. Wipe off dust with soft cloth.
• Signal communication may be disabled if an electronic-starter-type fluorescent lamp (such as
inverter-type lamps) is in the room. Consult the shop if that is the case.
• If the remote controller signals happen to operate another appliance, move that appliance to
somewhere else, or consult the shop.
Receive
r
Remote controller
holder
Set.
●To remove, pull it upwards.

9
■To set the clock
1. Press “CLOCK button”.
is displayed.
blinks.
2. Press “TIMER setting button”
to set the clock to the present
time.
Holding down “ ” or “ ” button rapidly
increases or decreases the time display.
3. Press “CLOCK button”.
blinks.
■Turn the breaker ON
•Turning ON the breaker opens the flap,
then closes it again. (This is a normal
procedure.)
NOTE
■ Tips for saving energy
• Be careful not to cool (heat) the room too much.
Keeping the temperature setting at a moderate level helps save energy.
• Cover windows with a blind or a curtain.
Blocking sunlight and air from outdoors increases the cooling (heating) effect.
• Clogged air filters cause inefficient operation and waste energy. Clean them
once in about every two weeks.
■ Please note
• The air conditioner always consumes 15-35 watts of electricity even while it is not operating.
• If you are not going to use the air conditioner for a long period, for example in spring or autumn, turn the breaker OFF.
• Use the air conditioner in the following conditions.
• Operation outside this humidity or temperature range may cause a safety device to disable the system.
1, 3
2
Recommended temperature setting
For cooling:26 ° C – 28 ° C
For heating:20 ° C – 24 ° C
Mode Operating conditions If operation is continued out of this range
COOL Outdoor temperature:〈2MK(X)S40〉 10 to 46°C
〈2MXS52〉 –10 to 46°C
〈 3/4/5MK(X)S 〉 –10 to 46°C
〈RK(X)S〉 –10 to 46°C
Indoor temperature: 18 to 32°C
Indoor humidity: 80% max.
• A safety device may work to stop the operation.
(In multi system, it may work to stop the operation of the
outdoor unit only.)
• Condensation may occur on the indoor unit and drip.
HEAT Outdoor temperature:〈2MXS40〉 –10 to 15.5°C
〈2MXS52〉 –15 to 15.5°C
〈 3/4/5MXS 〉 –15 to 15.5°C
〈 RXS20/25/35 〉 –15 to 20°C
〈RXS50/60〉 –15 to 18°C
Indoor temperature: 10 to 30°C
• A safety device may work to stop the operation.
DRY Outdoor temperature:〈2MK(X)S40〉 10 to 46°C
〈2MXS52〉 –10 to 46°C
〈 3/4/5MK(X)S 〉 –10 to 46°C
〈RK(X)S〉 –10 to 46°C
Indoor temperature: 18 to 32°C
Indoor humidity: 80% max.
• A safety device may work to stop the operation.
• Condensation may occur on the indoor unit and drip.

10
OPERATION
AUTO · DRY · COOL · HEAT · FAN Operation
The air conditioner operates with the operation mode of your choice.
From the next time on, the air conditioner will operate with the
same operation mode.
■To start operation
1. Press “MODE selector button”
and select a operation mode.
• Each pressing of the button advances the
mode setting in sequence.
:AUTO
:DRY
:COOL
:HEAT
:FAN
2. Press “ON/OFF button” .
• The OPERATION lamp lights up.
■To stop operation
3. Press “ON/OFF button” again.
• Then OPERATION lamp goes off.
■To change the temperature setting
4. Press “TEMPERATURE adjustment button”.
DRY or FAN mode AUTO or COOL or HEAT mode
The temperature setting is not variable.
Press “ ” to raise the temperature and press
“ ” to lower the temperature.
Set to the temperature you like.
2, 3
1
4
5
<FDKS>
<FDXS>

11
■To change the air flow rate setting
5. Press “FAN setting button”.
• Indoor unit quiet operation
When the air flow is set to “ ”, the noise from the indoor unit will become quieter.
Use this when making the noise quieter.
The unit might lose power when the fan strength is set to a weak level.
NOTE
DRY mode AUTO or COOL or HEAT or FAN mode
The air flow rate setting is not variable.
Five levels of air flow rate setting from “ ” to “ ”
plus “ ” “ ” are available.
■ Note on HEAT operation
• Since this air conditioner heats the room by taking heat from outdoor air to indoors, the heating
capacity becomes smaller in lower outdoor temperatures. If the heating effect is insufficient, it is
recommended to use another heating appliance in combination with the air conditioner.
• The heat pump system heats the room by circulating hot air around all parts of the room. After the
start of heating operation, it takes some time before the room gets warmer.
• In heating operation, frost may occur on the outdoor unit and lower the heating capacity. In that case,
the system switches into defrosting operation to take away the frost.
• During defrosting operation, hot air does not flow out of indoor unit.
■ Note on DRY operation
• The computer chip works to rid the room of humidity while maintaining the temperature as
much as possible. It automatically controls temperature and fan strength, so manual
adjustment of these functions is unavailable.
■ Note on AUTO operation
• In AUTO operation, the system selects a temperature setting and an appropriate operation mode
(COOL or HEAT) based on the room temperature at the start of the operation.
• The system automatically reselects setting at a regular interval to bring the room temperature to user-
setting level.
• If you do not like AUTO operation, you can manually select the operation mode and setting
you like.
■ Note on air flow rate setting
• At smaller air flow rates, the cooling (heating) effect is also smaller.

12
POWERFUL Operation
POWERFUL operation quickly maximizes the cooling
(heating) effect in any operation mode. You can get the
maximum capacity .
■To start POWERFUL
operation
1. Press “POWERFUL button”.
• POWERFUL operation ends in 20 minutes.
Then the system automatically operates
again with the settings which were used
before POWERFUL operation.
• When using POWERFUL operation,
there are some functions which are not
available.
• “ ” is displayed on the LCD.
■To cancel POWERFUL
operation
2. Press “POWERFUL button”
again.
• “ ” disappears from the LCD.
NOTE
■ Notes on POWERFUL operation
• In COOL and HEAT mode
To maximize the cooling (heating) effect, the capacity of outdoor unit must be increased
and the air flow rate be fixed to the maximum setting.
The temperature and air flow settings are not variable.
•
In DRY mode
The temperature setting is lowered by 2.5°C and the air flow rate is slightly increased.
•
In FAN mode
The air flow rate is fixed to the maximum setting.
•When using priority-room setting
See “Note for multi system” (page 18.)
1, 2

13
OUTDOOR UNIT QUIET Operation
OUTDOOR UNIT QUIET operation lowers the noise
level of the outdoor unit by changing the frequency and
fan speed on the outdoor unit. This function is
convenient during night.
■To start OUTDOOR UNIT
QUIET operation
1. Press “QUIET button”.
• “ ” is displayed on the LCD.
■ To cancel OUTDOOR UNIT
QUIET operation
2. Press “QUIET button” again.
• “ ” disappears from the LCD.
NOTE
■ Note on OUTDOOR UNIT QUIET operation
• If using a multi system, this function will work only when the OUTDOOR UNIT QUIET
operation is set on all operated indoor units.
However, if using priority-room setting, see “Note for multi system” (page 18.)
•
This function is available in COOL, HEAT, and AUTO modes.
(This is not available in FAN and DRY mode.)
• POWERFUL operation and OUTDOOR UNIT QUIET operation cannot be used at the
same time.
Priority is given to POWERFUL operation.
• If operation is stopped using the remote controller or the main unit ON/OFF switch when
using OUTDOOR UNIT QUIET operation, “ ” will remain on the remote controller
display.
1, 2

14
HOME LEAVE Operation
HOME LEAVE operation is a function which allows you to record
your preferred temperature and air flow rate settings.
■To start HOME LEAVE
operation
1. Press “HOME LEAVE button”.
• “ ” is displayed on the LCD.
• The HOME LEAVE lamp lights up.
■To cancel HOME LEAVE
operation
2. Press “HOME LEAVE button” again.
• The HOME LEAVE lamp goes off.
• “ ” disappears from the LCD.
Before using HOME LEAVE operation.
■ To set the temperature and air flow rate for HOME LEAVE operation
When using HOME LEAVE operation for the first time, please set the temperature and air flow rate
for HOME LEAVE operation.
Record your preferred temperature and air flow rate.
1. Press “HOME LEAVE button”. Make sure “ ” is displayed in the remote control
display.
2. Adjust the set temperature with “ ” or “ ” as you like.
3. Adjust the air flow rate with “FAN” setting button as you like.
Home leave operation will run with these settings the next time you use the unit. To change
the recorded information, repeat steps 1 – 3.
1, 2
Initial setting Selectable range
temperature Air flow rate temperature Air flow rate
Cooling 25
° C“” 18-32 ° C5 step, “ ” and
“”
Heating 25 ° C“” 10-30 ° C5 step, “ ” and
“”

15
■What’s the HOME LEAVE operation?
Is there a set temperature and air flow rate which is most comfortable, a set temperature and air flow
rate which you use the most? HOME LEAVE operation is a function that allows you to record your
favorite set temperature and air flow rate. You can start your favorite operation mode simply by pressing
the HOME LEAVE button on the remote control. This function is convenient in the following situations.
■Useful in these cases
1.Use as an energy-saving mode.
Set the temperature 2-3°C higher (cooling) or lower (heating) than normal. Setting the fan strength to the lowest
setting allows the unit to be used in energy-saving mode. Also convenient for use while you are out or sleeping.
• Every day before you leave the house...
• Before bed...
2.Use as a favorite mode.
Once you record the temperature and air flow rate settings you most often use, you can retrieve them by
pressing HOME LEAVE button. You do not have to go through troublesome remote control operations.
NOTE
When you go out, push the “HOME
LEAVE Operation” button, and the air
conditioner will adjust capacity to reach the
preset temperature for HOME LEAVE
Operation.
When you return, you will be
welcomed by a comfortably air
conditioned room.
Push the “HOME LEAVE
Operation” button again, and the air
conditioner will adjust capacity to
the set temperature for normal
operation.
Set the unit to HOME LEAVE
Operation before leaving the living
room when going to bed.
The unit will maintain the
temperature in the room at a
comfortable level while you sleep.
When you enter the living room in the
morning, the temperature will be just right.
Disengaging HOME LEAVE Operation
will return the temperature to that set
for normal operation. Even the coldest
winters will pose no problem!
• Once the temperature and air flow rate for HOME LEAVE operation are set, those settings will be used
whenever HOME LEAVE operation is used in the future. To change these settings, please refer to the
“Before using HOME LEAVE operation” section above.
• HOME LEAVE operation is only available in COOL and HEAT mode. Cannot be used in AUTO, DRY, and FAN mode.
• HOME LEAVE operation runs in accordance with the previous operation mode (COOL or HEAT) before
using HOME LEAVE operation.
• HOME LEAVE operation and POWERFUL operation cannot be used at the same time.
Last button that was pressed has priority.
• The operation mode cannot be changed while HOME LEAVE operation is being used.
• When operation is shut off during HOME LEAVE operation, using the remote controller or the indoor unit
ON/OFF switch, “ ” will remain on the remote controller display.

16
TIMER Operation
Timer functions are useful for automatically switching the
air conditioner on or off at night or in the morning. You can
also use OFF TIMER and ON TIMER in combination.
■ To use OFF TIMER operation
• Check that the clock is correct.
If not, set the clock to the present time.
(page 9.)
1. Press “OFF TIMER button”.
is displayed.
blinks.
2. Press “TIMER Setting button”
until the time setting reaches the
point you like.
• Every pressing of either button increases
or decreases the time setting by 10
minutes. Holding down either button
changes the setting rapidly.
3. Press “OFF TIMER button”
again.
• The TIMER lamp lights up.
■To cancel the OFF TIMER operation
4. Press “CANCEL button”.
• The TIMER lamp goes off.
NOTE
• When TIMER is set, the present time is not displayed.
• Once you set ON, OFF TIMER, the time setting is kept in the memory. (The memory is canceled when
remote controller batteries are replaced.)
• When operating the unit via the ON/OFF Timer, the actual length of operation may vary from the time
entered by the user. (Maximum approx. 10 minutes)
■ NIGHT SET MODE
When the OFF TIMER is set, the air conditioner automatically adjusts the temperature setting (0.5°C
up in COOL, 2.0°C down in HEAT) to prevent excessive cooling (heating) for your pleasant sleep.
4
2
1, 3

17
■To use ON TIMER operation
• Check that the clock is correct. If not, set
the clock to the present time
(page 9.).
1. Press “ON TIMER button”.
is displayed.
blinks.
2. Press “TIMER Setting button”
until the time setting reaches
the point you like.
• Every pressing of either button
increases or decreases the time setting
by 10 minutes. Holding down either
button changes the setting rapidly.
3. Press “ON TIMER button”
again.
• The TIMER lamp lights up.
■To cancel ON TIMER operation
4. Press “CANCEL button”.
• The TIMER lamp goes off.
■To combine ON TIMER and OFF TIMER
• A sample setting for combining the two timers is shown below.
ATTENTION
■ In the following cases, set the timer again.
• After a breaker has turned OFF.
• After a power failure.
• After replacing batteries in the remote controller.
2
1, 3
4
Display
(Example)
Present time: 11:00 p.m.
(The unit operating)
OFF TIMER at 0:00 a.m.
ON TIMER at 7:00 a.m. Combined

18
Note for Multi System
〈〈 What is a “Multi System”? 〉〉
This system has one outdoor unit connected to multiple indoor units.
■ Selecting the Operation Mode
1. With the Priority Room Setting
present but inactive or not present.
When more than one indoor unit is operating, priority is
given to the first unit that was turned on.
In this case, set the units that are turned on later to the
same operation mode (*1) as the first unit.
Otherwise, they will enter the Standby Mode, and the operation lamp will flash; this does not indicate malfunction.
(*1)
• COOL, DRY and FAN mode may be used at the same time.
• AUTO mode automatically selects COOL mode or HEAT mode based on the room temperature.
Therefore, AUTO mode is available when selecting the same operation mode as that of the room
with the first unit to be turned on.
〈CAUTION〉
Normally, the operation mode in the room where the unit is first run is given priority, but the following situations are
exceptions, so please keep this in mind.
If the operation mode of the first room is
FAN Mode , then using Heating Mode in any room after this will give priority to
heating. In this situation, the air conditioner running in FAN Mode will go on standby, and the operation lamp will flash.
2. With the Priority Room Setting active.
See “Priority Room Setting” on the next page.
■ NIGHT QUIET Mode (Available only for cooling operation)
NIGHT QUIET Mode requires initial programming during installation. Please consult your retailer or dealer for assistance.
NIGHT QUIET Mode reduces the operation noise of the outdoor unit during the night time hours to prevent
annoyance to neighbors.
• The NIGHT QUIET Mode is activated when the temperature drops 5 ° C or more below the highest temperature
recorded that day. Therefore, when the temperature difference is less than 5
° C, this function will not be activated.
• NIGHT QUIET Mode reduces slightly the cooling efficiency of the unit.
■ OUTDOOR UNIT QUIET Operation (page 13.)
1. With the Priority Room Setting present but inactive or not present.
When using the OUTDOOR UNIT QUIET operation feature with the Multi system, set all indoor units to
OUTDOOR UNIT QUIET operation using their remote controllers.
When clearing OUTDOOR UNIT QUIET operation, clear one of the operating indoor units using their remote controller.
However OUTDOOR UNIT QUIET operation display remains on the remote controller for other rooms.
We recommend you release all rooms using their remote controllers.
2. With the Priority Room Setting active.
See “Priority Room Setting” on the next page.
■ Cooling / Heating Mode Lock (Available only for heat pump models)
The Cooling / Heating Mode Lock requires initial programming during installation.Please consult your retailer or dealer
for assistance. The Cooling / Heating Mode Lock sets the unit forcibly to either Cooling or Heating Mode. This function
is convenient when you wish to set all indoor units connected to the Multi system to the same operation mode.
C
room
B
room
A
room
Living
room
Outdoor
unit

19
■Priority Room Setting
The Priority Room Setting requires initial programming during installation. Please consult your
retailer or dealer for assistance.
The room designated as the Priority Room takes priority in the following situations;
1. Operation Mode Priority.
As the operation mode of the Priority Room takes precedence, the user can select a different
operation mode from other rooms.
〈 Example 〉
* Room A is the Priority Room in the examples.
When COOL mode is selected in Room A while operating the following modes in Room B,C and D :
2. Priority when POWERFUL operation is used.
〈 Example 〉
* Room A is the Priority Room in the examples.
The indoor units in Rooms A,B,C and D are all operating. If the unit in Room A enters POWERFUL
operation, operation capacity will be concentrated in Room A. In such a case, the cooling (heating)
efficiency of the units in Rooms B,C and D may be slightly reduced.
3. Priority when using OUTDOOR UNIT QUIET operation.
〈Example〉
* Room A is the Priority Room in the examples.
Just by setting the unit in Room A to QUIET operation, the air conditioner starts OUTDOOR UNIT
QUIET operation.
You don’t have to set all the operated indoor units to QUIET operation.
Operation mode in Room B, C and D Status of Room B, C and D when the unit in Room A is in COOL mode
COOL or DRY or FAN Current operation mode maintained
HEAT The unit enters Standby Mode. Operation resumes when the
Room A unit stops operating.
AUTO
If the unit is set to COOL mode, operation continues. If set to
HEAT mode, it enters Standby Mode. Operation resumes when
the Room A unit stops operating.