Page 1
CEILING CASSETTE TYPE AIR CONDITIONERS
INDOOR UNIT
MLZ-KP25VF MLZ-KP35VF MLZ-KP50VF
OPERATING INSTRUCTIONS
• To use this unit correctly and safely, be sure to read these operating instructions
before use.
For user
English
Page 2
● OPERATING INSTRUCTIONS ●
CONTENTS
■ SAFETY PRECAUTIONS 1
■ PREPARATION BEFORE OPERATION 3
■ NAME OF EACH PART 4
■ SELECTING OPERATION MODES 5
■ FAN SPEED AND AIRFLOW DIRECTION ADJUSTMENT 6
■ I- SAVE OPERATION 6
■ ECONO COOL OPERATION 7
■ TIMER OPERATION (ON/OFF TIMER) 7
■ WEEKLY TIMER OPERATION 8
■ CLEANING 9
■ WHEN YOU THINK THAT TROUBLE HAS OCCURRED 11
■ WHEN THE AIR CONDITIONER IS NOT GOING TO BE USED FOR A LONG TIME 12
■ INSTALLATION PLACE AND ELECTRICAL WORK 12
■ SPECIFICATIONS 12
SAFETY PRECAUTIONS
Meanings of symbols displayed on indoor unit and/or outdoor unit
WARNING
(Risk of fi re)
Read the OPERATING INSTRUCTIONS carefully before operation.
This unit uses a fl ammable refrigerant.
If refrigerant leaks and comes in contact with fi re or heating part, it will create harmful gas and there is risk of fi re.
Service personnel are required to carefully read the OPERATING INSTRUCTIONS and INSTALLATION MANUAL before operation.
Further information is available in the OPERATING INSTRUCTIONS, INSTALLATION MANUAL, and the like.
• Since rotating parts and parts which could cause an electric shock are used
in this product, be sure to read these “Safety Precautions” before use.
• Since the cautionary items shown here are important for safety, be sure to
observe them.
• After reading this manual, keep it together with the installation manual in a
handy place for easy reference.
• Be sure to receive a guarantee card from your dealer and check that the
purchased data and shop name, etc. are entered correctly.
Marks and their meanings
WARNING :
CAUTION :
Incorrect handling could cause serious hazard, such as
death, serious injury, etc. with a high probability.
Incorrect handling could cause serious hazard depending
on the conditions.
WARNING
Do not connect the power cord to an intermediate point, use
an extension cord, or connect multiple devices to a single
AC outlet.
• This may cause overheating, fi re, or electric shock.
Make sure the power plug is free of dirt and insert it securely
into the outlet.
• A dirty plug may cause fi re or electric shock.
Do not bundle, pull, damage, or modify the power cord, and do
not apply heat or place heavy objects on it.
• This may cause fi re or electric shock.
Do not turn the breaker OFF/ON or disconnect/connect the
power plug during operation.
• This may create sparks, which can cause fi re.
• After the indoor unit is switched OFF with the remote controller,
make sure to turn the breaker OFF or disconnect the power plug.
Do not expose your body directly to cool air for a prolonged
length of time.
• This could be detrimental to your health.
The unit should not be installed, relocated, disassembled,
altered, or repaired by the user.
• An improperly handled air conditioner may cause fi re, electric
shock, injury, or water leakage, etc. Consult your dealer.
• If the power supply cord is damaged, it must be replaced by the
manufacturer or its service agent in order to avoid a hazard.
Meanings of symbols used in this manual
: Be sure not to do.
: Be sure to follow the instruction.
: Never insert your fi nger or stick, etc.
: Never step onto the indoor/outdoor unit and do not put anything on
them.
: Danger of electric shock. Be careful.
: Be sure to disconnect the power supply plug from the power outlet.
: Be sure to shut off the power.
: Risk of fi re.
When installing, relocating, or servicing the unit, make sure that
no substance other than the specifi ed refrigerant (R32/R410A)
enters the refrigerant circuit.
• Any presence of foreign substance such as air can cause abnormal pressure rise and may result in explosion or injury.
• The use of any refrigerant other than that specifi ed for the system
will cause mechanical failure, system malfunction, or unit breakdown. In the worst case, this could lead to a serious impediment
to securing product safety.
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 should be supervised to ensure that they do not play
with the appliance.
Do not insert your fi nger, a stick, or other objects into the air
inlet or outlet.
• This may cause injury, since the fan inside rotates at high speeds
during operation.
In case of an abnormal condition (such as a burning smell),
stop the air conditioner and disconnect the power plug or turn
the breaker OFF.
• A continued operation in the abnormal state may cause a malfunction, fi re, or electric shock. In this case, consult your dealer.
EN-1
Page 3
SAFETY PRECAUTIONS
WARNING
When the air conditioner does not cool or heat, there is a possibility of refrigerant leakage. If any refrigerant leakage is found,
stop operations and ventilate the room well and consult your
dealer immediately. If a repair involves recharging the unit with
refrigerant, ask the service technician for details.
• The refrigerant used in the air conditioner is not harmful. Normally,
it does not leak. However, if refrigerant leaks and comes in contact
with fi re or heating part of such a fan heater, kerosene heater, or
cooking stove, it will create harmful gas and there is risk of fi re.
The user should never attempt to wash the inside of the indoor
unit. Should the inside of the unit require cleaning, contact
your dealer.
• Unsuitable detergent may cause damage to plastic material inside
the unit, which may result in water leakage. Should detergent
come in contact with electrical parts or the motor, it will result in a
malfunction, smoke, or fi re.
• The appliance shall be stored in a room without continuously operating ignition sources (for example: open fl ames, an operating
gas appliance or an operating electric heater).
• Be aware that refrigerants may not contain an odour.
• Do not use means to accelerate the defrosting process or to clean
the appliance, other than those recommended by the manufacturer.
• Do not pierce or burn.
This unit should be installed in rooms which exceed the fl oor
space specifi ed in outdoor unit installation manual.
• Refer to outdoor unit installation manual.
This appliance is intended to be used by expert or trained users
in shops, in light industry and on farms, or for commercial use
by lay persons.
CAUTION
Do not touch the air inlet or the aluminum fi ns of the indoor/
outdoor unit.
• This may cause injury.
Do not use insecticides or fl ammable sprays on the unit.
• This may cause a fi re or deformation of the unit.
Do not expose pets or houseplants to direct airfl ow.
• This may cause injury to the pets or plants.
Do not place other electric appliances or furniture under the
indoor/outdoor unit.
• Water may drip down from the unit, which may cause damage or
malfunction.
Do not leave the unit on a damaged installation stand.
• The unit may fall and cause injury.
Do not step on an unstable bench to operate or clean the unit.
• This may cause injury if you fall down.
Do not pull the power cord.
• This may cause a portion of the core wire to break, which may
cause overheating or fi re.
Do not charge or disassemble the batteries, and do not throw
them into a fi re.
• This may cause the batteries to leak, or cause a fi re or explosion.
Do not operate the unit for more than 4 hours at high humidity
(80% RH or more) and/or with windows or outside door left open.
• This may cause the water condensation in the air conditioner, which
may drip down, wetting or damaging the furniture.
• The water condensation in the air conditioner may contribute to
growth of fungi, such as mold.
Do not use the unit for special purposes, such as storing food,
raising animals, growing plants, or preserving precision devices
or art objects.
• This may cause deterioration of quality, or harm to animals and
plants.
Do not expose combustion appliances to direct airfl ow.
• This may cause incomplete combustion.
Never put batteries in your mouth for any reason to avoid accidental ingestion.
• Battery ingestion may cause choking and/or poisoning.
Before cleaning the unit, switch it OFF and disconnect the power
plug or turn the breaker OFF.
• This may cause injury, since the fan inside rotates at high speeds
during operation.
When the unit will be unused for a long time, disconnect the
power plug or turn the breaker OFF.
• The unit may accumulate dirt, which may cause overheating or fi re.
Replace all batteries of the remote controller with new ones of
the same type.
• Using an old battery together with a new one may cause overheating, leakage, or explosion.
If the battery fl uid comes in contact with your skin or clothes,
wash them thoroughly with clean water.
• If the battery fl uid comes in contact with your eyes, wash them
thoroughly with clean water and immediately seek medical attention.
Ensure that the area is well-ventilated when the unit is operated
together with a combustion appliance.
• Inadequate ventilation may cause oxygen starvation.
Turn the breaker OFF when you hear thunder and there is a possibility of a lightning strike.
• The unit may be damaged if lightning strikes.
After the air conditioner is used for several seasons, perform
inspection and maintenance in addition to normal cleaning.
• Dirt or dust in the unit may create an unpleasant odor, contribute
to growth of fungi, such as mold, or clog the drain passage, and
cause water to leak from the indoor unit. Consult your dealer for
inspection and maintenance, which require specialized knowledge
and skills.
Do not operate switches with wet hands.
• This may cause electric shock.
Do not clean the air conditioner with water or place an object that
contains water, such as a fl ower vase, on it.
• This may cause fi re or electric shock.
Do not step on or place any object on the outdoor unit.
• This may cause injury if you or the object falls down.
IMPORTANT
Dirty fi lters cause condensation in the air conditioner which will contribute
to the growth of fungi such as mold. It is therefore recommended to clean
air fi lters every 2 weeks.
For installation
WARNING
Consult your dealer for installing the air conditioner.
• It should not be installed by the user since installation requires
specialized knowledge and skills. An improperly installed air conditioner may cause water leakage, fi re, or electric shock.
Provide a dedicated power supply for the air conditioner.
• A non-dedicated power supply may cause overheating or fi re.
Do not install the unit where fl ammable gas could leak.
• If gas leaks and accumulates around the outdoor unit, it may cause
an explosion.
Earth the unit correctly.
• Do not connect the earth wire to a gas pipe, water pipe, lightning
rod, or a telephone earth wire. Improper earthing may cause electric
shock.
CAUTION
Install an earth leakage breaker depending on the installation
location of the air conditioner (such as highly humid areas).
• If an earth leakage breaker is not installed, it may cause electric
shock.
Ensure that the drain water is properly drained.
• If the drain passage is improper, water may drip down from the
indoor/outdoor unit, wetting and damaging the furniture.
In case of an abnormal condition
Immediately stop operating the air conditioner and consult your dealer.
EN-2
Page 4
● OPERATING INSTRUCTIONS ●
PREPARATION BEFORE OPERATION
Before operation: Insert the power supply plug into the power outlet and/or turn the breaker on.
Installing the remote controller batteries
Press RESET.
4.
Remove the front lid.
1.
Insert the negative
2.
pole of AAA alkaline
batteries fi rst.
Install the front lid.
3.
Note:
• Make sure the polarity of the batteries is correct.
• Do not use manganese batteries and leaking batteries. The remote controller
could malfunction.
• Do not use rechargeable batteries.
• The battery replacement indicator lights up when the battery is running low.
In about 7 days after the indicator starts lights up, the remote controller stops
working.
• Replace all batteries with new ones of the same type.
• Batteries can be used for approximately 1 year. However, batteries with expired shelf lives last shorter.
• Press RESET gently using a thin instrument.
If the RESET button is not pressed, the remote controller may not operate
correctly.
Setting current time
Press CLOCK.
1.
2.
Press CLOCK again.
4.
Note:
• Press CLOCK gently using a thin instrument.
Each press increases/decreas-
Press the DAY button
3.
to set the day.
Press either the TIME button
or the TIMER buttons to set
the time.
es the time by 1 minute (10
minutes when pressed longer).
EN-3
Page 5
NAME OF EACH PART
Indoor unit
Air inlet
Air outlet
Air cleaning fi lter
(Anti-Allergy Enzyme
fi lter, option)
Display section
Safety strings
Open the display cover
Horizontal vane
Vertical vane
Intake grille
Air fi lter
(Air purifying
fi lter)
Spec name plate
Remote controller
Battery replacement indicator Page 3
Operation
display section
Temperature
Page 5
buttons
Operation
select button
Page 5
ECONO COOL
Page 7
button
VANE control
Page 6
button
i-save button
Page 6
CLOCK button
Page 3
Lid
Slide the lid
down to open
the remote
controller.
Slide it down
further to get
to the weekly
timer buttons.
Remote
controller holder
• Install the remote controller holder in a place
where the signal can be
received by the indoor
unit.
Signal transmitting
section
Distance of signal :
About 6 m
Beep(s) is (are) heard from
the indoor unit when the
signal is received.
90°
Operate the remote controller in the area where signal is
received, and beep is heard.
OFF/ON
(stop/operate) button
FAN speed control
Page 6
button
WIDE VANE control
Page 6
button
TIME, TIMER set buttons
Page 3, 7
Increase time
Decrease time
WEEKLY TIMER
set buttons
RESET button Page 3
Only use the remote controller provided with the unit.
Do not use other remote controllers.
If two or more indoor units are installed
in proximity to one another, an indoor
unit that is not intended to be operated
may respond to the remote controller.
Page 8
Remote control receiving section
Emergency operation switch Page 5
Operation indicator lamp
Outdoor unit
Air inlet (back and side)
Refrigerant piping
Air outlet
Drain outlet
Outdoor units may be different in appearance.
EN-4
Page 6
● OPERATING INSTRUCTIONS ●
SELECTING OPERATION MODES
AUTO mode (Auto changeover)
The unit selects the operation mode according to the difference between the
room temperature and the set temperature. During AUTO mode, the unit
changes mode (COOL↔HEAT) when the room temperature is about 2°C
away from the set temperature for more than 15 minutes.
Note:
During multi system operation, the unit may not be able to switch operation mode between COOL and HEAT. In this case, the indoor unit becomes standby mode (Refer to table of Operation indicator lamp).
COOL mode
Enjoy cool air at your desired temperature.
Note:
Do not operate COOL mode at low outside temperature (less than -10°C).
Water condensed in the unit may drip and wet or damage furniture, etc.
DRY mode
Dehumidify your room. The room may be cooled slightly.
Temperature cannot be set during DRY mode.
HEAT mode
Enjoy warm air at your desired temperature.
1
2
Press
Press to select operation mode. Each press
to start the operation.
changes mode in the following order:
(AUTO) (COOL) (DRY) (HEAT) (FAN)
3
Press or to set the temperature.
Each press raises or lowers the temperature by 1°C.
Press
to stop the operation.
Note:
Operation indicator lamp
The operation indicator lamp shows the operation state of the unit.
Indication Operation state Room temperature
The unit is operating to reach the set
temperature
The room temperature is approaching the set temperature
Standby mode (Refer to multi system
operation)
About 2°C or more away
from set temperature
About 1 to 2°C from set
temperature
—
FAN mode
Circulate the air in your room.
Temperature cannot be set during FAN mode.
Note:
After COOL/DRY mode operation, it is recommended to operate in the
FAN mode to dry inside the indoor unit.
Emergency operation
When the remote controller cannot be used...
Emergency operation can be activated by pressing the emergency operation
switch (E.O.SW) on the indoor unit.
Each time the E.O.SW is pressed, the operation changes in
the following order:
Operation indicator lamp
Emergency COOL
Emergency HEAT
Set temperature : 24°C
Stop
Fan speed : Medium
Horizontal vane : Auto
Lit Blinking
Not lit
Multi system operation
Two or more indoor units can be operated by one outdoor unit. When several
indoor units are operated simultaneously, cooling and heating operations cannot
be done at the same time. When COOL is selected with one unit and HEAT with
another or vice versa, the unit operated later becomes standby mode.
Water may condense when HEAT is operated with other units within 3 hours
after COOL/DRY operation is stopped.
To prevent water condensation, perform HEAT with temperature set to 16°C
for about 30 minutes after COOL/DRY operation.
EN-5
Note:
The fi rst 30 minutes of operation is test run. Temperature
control does not work, and fan speed is set to High.
Auto restart function
If a power failure occurs or the main power is turned off during operation, “Auto
restart function” automatically starts operation in the same mode as the one set
with the remote controller just before the shutoff of the main power. When timer is
set, timer setting is cancelled and the unit starts operation when power is resumed.
If you do not want to use this function, please consult the service representative because the setting of the unit needs to be changed.
Page 7
FAN SPEED AND AIRFLOW
DIRECTION ADJUSTMENT
I-SAVE OPERATION
Press to select fan speed. Each press changes
fan speed in the following order:
(AUTO) (Quiet) (Low) (Med.) (High)
• Two short beeps are heard from the indoor unit when set to AUTO.
Press to select airfl ow direction. Each press
changes airfl ow direction in the following order:
(AUTO) (1) (2) (3) (4) (5) (SWING)
• Two short beeps are heard from the indoor unit when set to AUTO.
Airflow direction
(AUTO) ......... The vane is set to the most effi cient airfl ow direction. COOL/
(Manual) .......For efficient air conditioning, select upper position for COOL/
(Swing) ......... The vane moves up and down intermittently.
Press to change horizontal airfl ow direction.
• The vertical vane moves for about 30 seconds.
• After 30 seconds, the vertical vane moves to its original position. In
DRY: horizontal position. HEAT: downward position.
DRY, and lower position for HEAT.
this case, press
again.
1
Press during COOL, or HEAT mode to select
i-save mode.
2
Set the temperature, fan speed and airfl ow direction.
• The same setting is selected from the next time by simply pressing
.
• Two settings can be saved. (One for COOL, one for HEAT)
• Select the appropriate temperature, fan speed and airflow direction
according to your room.
Press again to cancel i-save operation.
• i-save operation also is cancelled when the MODE button is pressed.
i-save operation
• A simplified set back function enables to recall the preferred (preset) setting
with a single push of the
back to the previous setting in an instance.
• i-save operation cannot be set on the weekly timer.
Example of use:
1. Low energy mode
Set the temperature 2°C to 3°C warmer in COOL and cooler in HEAT mode.
This setting is suitable for unoccupied room, and while you are sleeping.
2. Saving frequently used settings
Save your preferred setting for COOL and HEAT. This enables you to select
your preferred setting with a single push of the button.
button. Press the button again and you can go
Press again to set horizontal airfl ow direction.
• The vertical vane stops and the airflow direction is set.
EN-6
Page 8
● OPERATING INSTRUCTIONS ●
ECONO COOL OPERATION
Press during COOL mode page 5 to start
ECONO COOL operation.
The unit performs swing operation vertically in various cycle according
to the temperature of the unit. Set temperature is set 2°C higher automatically.
Press again to cancel ECONO COOL operation.
• Pressing also cancels ECONO COOL operation.
What is “ECONO COOL”?
Swing airfl ow (change of air fl ow) makes you feel cooler than stationary airfl ow.
The set temperature and the airfl ow direction are automatically changed by the
microprocessor.
It is possible to perform cooling operation with keeping comfort.
As a result energy can be saved.
TIMER OPERATION (ON/OFF TIMER)
1
Press or during operation to set the timer.
(ON timer) : The unit turns ON at the set time.
(OFF timer) : The unit turns OFF at the set time.
* or blinks.
Make sure that the current time and day are set correctly.
*
Page 3
2
Press (Increase) and (Decrease) to set the
time of timer.
Each press increases or decreases the set time by 10 minutes.
• Set the timer while
3
Press
or
or is blinking.
again to cancel timer.
Note:
• ON and OFF timers can be set together. mark indicates the order of timer
operations.
• If power failure occurs while ON/OFF timer is set, see page 5 “Auto restart
function”.
EN-7
Page 9
WEEKLY TIMER OPERATION
• A maximum of 4 ON or OFF timers can be set for individual days of the week.
• A maximum of 28 ON or OFF timers can be set for a week.
E.g. : Runs at 24°C from waking up to leaving home, and runs at 27°C from
getting home to going to bed on weekdays.
Runs at 27°C from waking up late to going bed early on weekends.
Note:
The simple ON/OFF timer setting is available while the weekly timer is on. In
this case, the ON/OFF timer has priority over the weekly timer; the weekly timer
operation will start again after the simple ON/OFF timer is complete.
Setting1 Setting2 Setting3 Setting4
Mon
Sun
ON OFF ON OFF
~
Fri
Sat
~
24°C 27°C
6:00 8:30 17:30 22:00
Setting1 Setting2
ON OFF
8:00 21:00
27°C
3
Press , , and to set ON/OFF, time, and
temperature.
E.g. : [ON], [6:00]
and [24°C] are
selected.
Pressing
selects ON/OFF timer.
Pressing
deletes timer setting.
* Hold down the button to change the time quickly.
* The temperature can be set between 16°C and 31°C at weekly timer.
Pressing
adjusts the time.
Pressing
adjusts the temperature.
Press and to continue setting the timer for
other days and/or numbers.
4
Press to complete and transmit the weekly timer
setting.
* which was blink-
ing goes out, and the
current time will be
displayed.
Setting the weekly timer
* Make sure that the current time and day are set correctly.
1
Press to enter the weekly timer setting mode.
* blinks.
2
Press and to select setting day and number.
E.g. : [Mon Tue ... Sun]
and [1] are selected.
Note:
• Press to transmit the setting information of weekly timer to the indoor
unit. Point the remote controller toward the indoor unit for 3 seconds.
• When setting the timer for more than one day of the week or one number,
does not have to be pressed per each setting. Press once after
all the settings are complete. All the weekly timer settings will be saved.
• Press
controller toward the indoor unit.
5
* When the weekly timer is ON, the day of the week whose timer setting
to enter the weekly timer setting mode, and press and hold
for 5 seconds to erase all weekly timer settings. Point the remote
Press to turn the weekly timer ON. ( lights.)
is complete, will light.
Press again to turn the weekly timer OFF. (
goes out.)
Note:
The saved settings will not be cleared when the weekly timer is turned OFF.
Checking weekly timer setting
1
Press to enter the weekly timer setting mode.
* blinks.
Pressing selects the day of
the week to be set.
* All days can be selected.
Pressing selects
the setting number.
2
Press or to view the setting of the particular
day or number.
Press to exit the weekly timer setting.
EN-8
Page 10
● OPERATING INSTRUCTIONS ●
CLEANING
Instructions:
• Switch off the power supply or turn off the breaker before cleaning.
• Be careful not to touch the metal parts with your hands.
• Do not use benzine, thinner, polishing powder, or insecticide.
• Use only diluted mild detergents.
Open Close
1. Press the tabs on the intake grille.
Tab
• Do not expose parts to direct sunlight, heat, or fl ames to dry.
• Do not use water hotter than 50°C.
• Do not use a scrubbing brush, a hard sponge, or the like.
• Do not soak or rinse the horizontal vane.
1. Close the intake grille.
• Make sure that the safety strings do not hang out of the intake grille.
2. Press around the each tab of the intake grille until a “click” is heard and press
the center.
Around tab
2. Open the intake grille while holding it.
EN-9
Page 11
CLEANING
Intake grille
1. Slide the shafts and unhook the safety strings to remove.
• Wipe with a soft dry cloth, or wash it with water using soft cloth, sponge, etc.
• Do not soak it in water for more than two hours.
• Dry it well in shade before installing it.
Hook
Safety strings
Air fi lter (Air purifying fi lter)
• Clean every 2 weeks
• Remove dirt by a vacuum cleaner, or rinse with water.
• Dry it well in shade before installing it.
Install the tabs into the intake grille hole.
Air cleaning fi lter
(Anti-Allergy Enzyme fi lter, option)
Back side of air fi lter
Clean every 3 months:
• Remove dirt by a vacuum cleaner.
When dirt cannot be removed by vacuum cleaning:
• Soak the fi lter and its frame in lukewarm water before rinsing it.
(Diluted mild detergents can be used when dirt cannot be removed.)
• After washing, dry it well in shade.
Every year:
• Replace it with a new air cleaning fi lter for best performance.
• Parts Number MAC-408FT-E
2. Install the intake grille by following the removal procedure in reverse.
WARNING
Make sure to hook the safety string of the intake grille.
Not doing so may cause injury due to the intake grille falling.
Important
• Clean the fi lters regularly for best performance and to
reduce power consumption.
• Dirty fi lters cause condensation in the air conditioner
which will contribute to the growth of fungi such as
mold. It is therefore recommended to clean air fi lters
every 2 weeks.
EN-10
Page 12
● OPERATING INSTRUCTIONS ●
WHEN YOU THINK THAT TROUBLE HAS OCCURRED
Even if these items are checked, when the unit does not recover from the
trouble, stop using the air conditioner and consult your dealer.
Symptom Explanation & Check points
Indoor Unit
The unit cannot be operated.
The unit cannot be operated
for about 3 minutes when
restarted.
Mist is discharged from the air
outlet of the indoor unit.
The swing operation of the
HORIZONTAL VANE is
suspended for a while, then
restarted.
The air fl ow direction changes
during operation.
The direction of the horizontal
vane cannot be adjusted with
the remote controller.
The operation is stopped for
about 10 minutes in the heating operation.
The unit starts operation by
itself when the main power
is turned on, though it isn’t
operated with the remote
controller.
The indoor unit which is not
operating becomes warm and
a sound, similar to water fl owing, is heard from the unit.
The indoor unit discolors over
time.
Outdoor Unit (Multi system)
When heating operation is
selected, operation does not
start right away.
The fan of the outdoor unit
does not rotate even though
the compressor is running.
Even if the fan starts to rotate,
it stops soon.
Water leaks from the outdoor
unit.
White smoke is discharged
from the outdoor unit.
Remote controller
The display on the remote
controller does not appear or
it is dim. The indoor unit does
not respond to the remote
control signal.
Does not cool or heat
The room cannot be cooled or
heated suffi ciently.
• Is the breaker turned on?
• Is the ON timer set? Page7
• This protects the unit according to instructions from the microprocessor. Please wait.
• The cool air from the unit rapidly cools moisture in the air inside the room, and it turns
into mist.
• This is for the swing operation of the HORIZONTAL VANE to be performed normally.
• In the heating operation, if the air fl ow temperature is too low or when defrosting is being done, the horizontal vane is automatically
set to horizontal position.
• Defrosting of the outdoor unit is being done.
Since this is completed in max.10 minutes,
please wait. (When the outside temperature
is too low and humidity is too high, frost is
formed.)
• These models are equipped with an auto restart function. When the main power is turned
off without stopping the unit with the remote
controller and is turned on again, the unit
starts operation automatically in the same
mode as the one set with the remote controller just before the shutoff of the main power.
Refer to “Auto restart function”. Page 5
• A small amount of refrigerant continues to
fl ow into the indoor unit even though it is not
operating.
• Although plastic turns yellow due to the infl uence of some factors such as ultraviolet light
and temperature, this has no effect on the
product functions.
• When operation is started during defrosting
of outdoor unit is done, it takes a few minutes
(max. 10 minutes) to blow out warm air.
• When the outside temperature is low during
cooling operation, the fan operates intermittently to maintain suffi cient cooling capacity.
• During COOL and DRY operations, pipe or
pipe connecting sections are cooled and this
causes water to condense.
• In the heating operation, water condensed
on the heat exchanger drips down.
• In the heating operation, the defrosting operation makes water frozen on the outdoor
unit melt and drip down.
• In the heating operation, vapor generated
by the defrosting operation looks like white
smoke.
• Are the batteries exhausted? Page 3
• Is the polarity (+, -) of the batteries correct?
Page 3
• Are any buttons on the remote controller of
other electric appliances being pressed?
• Is the temperature setting appropriate?
Page 5
• Is the fan setting appropriate? Please
change fan speed to Med. or High.
• Is the fi lter clean? Page 9, 10
• Is the fan or heat exchanger of the indoor
unit clean? Page 9, 10
• Are there any obstacles blocking the air inlet
or outlet of the indoor or outdoor unit?
• Is a window or door open?
• It may take a certain time to reach the setting
temperature or may not reach that depending on the size of the room, the ambient
temperature, and the like.
Symptom Explanation & Check points
Does not cool or heat
The room cannot be cooled
suffi ciently.
The room cannot be heated
suffi ciently.
Air does not blow out soon in
the heating operation.
Airfl ow
The air from the indoor unit
smells strange.
Sound
Cracking sound is heard. • This sound is generated by the expansion/
The sound as burbling is
heard.
Burbling sound is heard from
the indoor unit when DRY/
COOL operation is stopped.
Mechanical sound is heard
from the indoor unit.
The sound of water fl owing
is heard.
Hissing sound is sometimes
heard.
The sound of motor and
swirling sound is heard from
the indoor unit.
Timer
Weekly timer does not operate according to settings.
The unit starts/stops the
operation by itself.
Dirt
The ceiling and wall around
the indoor unit get dirty.
In the following cases, stop using the air conditioner and consult your
dealer.
• When water leaks or drips from the indoor unit.
• When the upper operation indicator lamp blinks.
• When the breaker trips frequently.
• The remote control signal is not received in a room where an electronic ON/
OFF type fl uorescent lamp (inverter-type fl uorescent lamp, etc.) is used.
• Operation of the air conditioner interferes with radio or TV reception. An amplifi er may be required for the affected device.
• When an abnormal sound is heard.
• When any refrigerant leakage is found.
• When a ventilation fan or a gas cooker is
used in a room, the cooling load increases,
resulting in an insuffi cient cooling effect.
• When the outside temperature is high, the
cooling effect may not be suffi cient.
• When the outside temperature is low, the
heating effect may not be suffi cient.
• Please wait as the unit is preparing to blow
out warm air.
• Is the fi lter clean? Page 9, 10
• Is the fan or heat exchanger of the indoor unit
clean? Page 9, 10
• The unit may suck in an odor adhering to the
wall, carpet, furniture, cloth, etc. and blow it
out with the air.
contraction of the intake grille, etc. due to
change in temperature.
• This sound is heard when the outside air is
absorbed from the drain hose by turning on
the range hood or the ventilation fan, making
water fl owing in the drain hose to spout out.
This sound is also heard when the outside air
blows into the drain hose in case the outside
wind is strong.
• This is the sound of drained water fl owing
backward in the drain piping in the ceiling.
• This is the switching sound in turning on/off
the fan or the compressor.
• This is the sound of refrigerant or condensed
water fl owing in the unit.
• This is the sound when the fl ow of refrigerant
inside the unit is switched.
• This is the sound of water condensed during
COOL/DRY operation being drained from the
indoor unit.
• Sound of water draining may also be heard
from indoor units which are not operating.
(The sound will stop automatically. Please
wait.)
• Is the ON/OFF timer set? Page 7
• Transmit the setting information of the weekly
timer to the indoor unit again. When the information is successfully received, a long beep
will sound from the indoor unit. If information
fails to be received, 3 short beeps will be
heard. Ensure information is successfully
received. Page 8
• When a power failure occurs and the main
power turns off, the indoor unit built-in clock
will be incorrect. As a result, the weekly timer
may not work normally.
Be sure to place the remote controller where
the signal can be received by the indoor unit.
Page 4
• Is the weekly timer set? Page 8
• Please clean the periphery of the air conditioner frequently.
• It may prevent the dirt to lower the wind blowing to the ceiling by adjusting the vertical wind
direction.
EN-11
Page 13
WHEN THE AIR CONDITIONER IS NOT
GOING TO BE USED FOR A LONG TIME
INSTALLATION PLACE AND
ELECTRICAL WORK
1
Operate by COOL mode with the highest temperature
set or FAN mode for 3 to 4 hours. Page 5
This dries the inside of the unit.
2
3
Press
Turn off the breaker and/or disconnect the power sup-
to stop the operation.
ply plug.
4
Remove all batteries from the remote controller.
When using the air conditioner again:
1
Clean the air fi lter. Page 9, 10
2
Check that the air inlet and outlet of the indoor and
outdoor units are not blocked.
3
Check that the earth is connected correctly.
4
Refer to the “PREPARATION BEFORE OPERATION”,
and follow the instructions. Page 3
Installation place
Avoid installing the air conditioner in the following places.
• Where there is much machine oil.
• Salty places such as the seaside.
• Where sulfi de gas is generated such as hot spring, sewage, waste water.
• Where oil is splashed or where the area is fi lled with oily smoke (such as cooking areas and factories, in which the properties of plastic could be changed
and damaged).
• Where there is high-frequency or wireless equipment.
• Where the air from the outdoor unit air outlet is blocked.
Where the operation sound or air from the outdoor unit bothers the house next door.
•
• The mounting height of indoor unit 2.2 m is recommended. If it is impossible,
please consult your dealer.
• Do not operate the air conditioner during interior construction and fi nishing
work, or while waxing the fl oor. Before operating the air conditioner, ventilate
the room well after such work is performed. Otherwise, it may cause volatile
elements to adhere inside the air conditioner, resulting in water leakage or
scattering of dew.
The installation location of the outdoor
unit should be at least 3 m away from
the antennas for TV sets, radios, etc. In
areas where the reception is weak, provide greater space between the outdoor
unit and the antenna of the affected
device if operation of the air conditioner
interferes with radio or TV reception.
For the optimum effi ciency and to extend
the life time of using,
the outdoor unit
should be installed in
a well-ventilated dry
place.
100 mm or
more
TV
3 m or more
500 mm
or more
wall, etc.
To prevent the effects
of a fl uorescent lamp,
keep as far apart as
possible.
1 m
or more
Cordless
phone or
Portable
phone
1 m
or
more
Radio
Inverter-type
fl uorescent lamp
Keep a space
to prevent
the picture
distortion or
the noise.
SPECIFICATIONS
Guaranteed operating range
Upper limit
Cooling
Lower limit
Upper limit
Heating
Lower limit
Indoor Outdoor
32°C DB
23°C WB
21°C DB
15°C WB
27°C DB
—
20°C DB
—
*Note 1.
DB: Dry Bulb
WB: Wet Bulb
Electrical work
• Provide an exclusive circuit for the power supply of the air conditioner.
• Be sure to observe the breaker capacity.
If you have any questions, consult your dealer.
Note:
1. MLZ-KP has no specifi cations for single combination. This indoor model
is only for multi system air conditioner.
As for the specifi cations of multi system, please confi rm your dealer
and/or refer to the catalogue.
EN-12
Page 14
Page 15
Page 16
HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN
RG79Y943H01
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