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FLOOR-TYPE AIR CONDITIONERS
INDOOR UNIT
MFZ-KW25VG MFZ-KW35VG MFZ-KW42VG MFZ-KW50VG MFZ-KW60VG
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
■ NAME OF EACH PART 3
■ PREPARATION BEFORE OPERATION 4
■ SELECTING OPERATION MODES 5
■ FAN SPEED AND AIRFLOW DIRECTION ADJUSTMENT 6
■ I-SAVE OPERATION 7
■ ECONO COOL OPERATION 7
■ TIMER OPERATION (ON/OFF TIMER) 7
■ EMERGENCY OPERATION 8
■ AUTO RESTART FUNCTION 8
■ WEEKLY TIMER OPERATION 9
■ CLEANING 10
■ 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 13
SAFETY PRECAUTIONS
Meanings of symbols displayed on indoor unit and/or outdoor unit
WARNING
(Risk of re)
Read the OPERATING INSTRUCTIONS carefully before operation.
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.
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, 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 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 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 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.
This unit uses a ammable refrigerant.
If refrigerant leaks and comes in contact with re or heating part, it will create harmful gas and there is risk of re.
Meanings of symbols used in this manual
: Be sure not to do.
: Be sure to follow the instruction.
: Never insert your 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 o the power.
: Risk of re.
WARNING
The unit should not be installed, relocated, disassembled,
altered, or repaired by the user.
• An improperly handled air conditioner may cause 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.
When installing, relocating, or servicing the unit, make sure
that no substance other than the specied 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 specied 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.
EN-1
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SAFETY PRECAUTIONS
Do not turn the breaker OFF except the case of burning
smell, or when performing maintenance or inspection.
• The refrigerant leakage cannot be detected, and this may
cause a re.
Do not install the unit in a place where smoke, gas, or
chemicals may ll.
• Do not use any gas equipment for propane, butane or
methane, sprays such as bug killer, and paint etc., near by
the indoor unit.
• The refrigerant sensor reacts to it and displays an error. This
may cause the unit not to operate.
(Procedure in case of refrigerant leakage)
If the refrigerant leaks, extinguish a re such as a heater,
and ventilate the room adequately by opening the window.
• Then contact your dealer.
• The indoor unit spreads the refrigerant by FAN mode to
prevent a re. Do not turn the breaker OFF during this situation.
Do not insert your 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, re, or electric shock. In this case, consult your
dealer.
When the air conditioner does not cool or heat, there is a
possibility of refrigerant leakage. If any refrigerant leakage
is found, ventilate the room well and consult your dealer
immediately. Do not turn the breaker OFF. 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 re or heating part of such a fan heater,
kerosene heater, or cooking stove, it will create harmful gas
and there is risk of 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 re.
• The appliance shall be stored in a room without continuously
operating ignition sources (for example: open 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
oor space specied 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 laypersons.
CAUTION
Do not touch the air inlet or the aluminum ns of the indoor/
outdoor unit.
• This may cause injury.
Do not use insecticides or ammable sprays on the unit.
• This may cause a re or deformation of the unit.
Do not expose pets or houseplants to direct airow.
• 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 re.
Do not charge or disassemble the batteries, and do not
throw them into a re.
• This may cause the batteries to leak, or cause a re or
explosion.
Do not operate the unit for more than 4 hours at high hu-
midity (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 airow.
• 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.
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 uid comes in contact with your skin or
clothes, wash them thoroughly with clean water.
• If the battery 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 ower vase, on it.
• This may cause 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 lters cause condensation in the air conditioner which will con-
tribute to the growth of fungi such as mold. It is therefore recommended
to clean air lters every 2 weeks.
EN-2
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● OPERATING INSTRUCTIONS ●
SAFETY PRECAUTIONS
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, re, or
electric shock.
Provide a dedicated power supply for the air conditioner.
• A non-dedicated power supply may cause overheating or
re.
Do not install the unit where ammable gas could leak.
• If gas leaks and accumulates around the outdoor unit, it may
cause an explosion.
NAME OF EACH PART
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 installa-
tion 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.
Air outlet
Multi-ow vane
Air cleaning lter
(Anti-Allergy Enzyme lter)
Spec name
plate *1
Front panel
Air lter (Air purifying lter)
Display and operation section
(When the front panel is opened)
Remote control receiving section
Operation indicator lamp
Horizontal vane
E.O
SW
Vertical vane
Fan guard
Panel
Emergency operation
switch
Outdoor unitIndoor unit
Air inlet (back and side)
Spec name plate *1
Refrigerant piping
Drainage hose
Air outlet
Drain outlet
Outdoor units may be dierent in appearance.
*1 The manufacturing year and month is indicated on the spec name plate.
EN-3
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NAME OF EACH PART
PREPARATION BEFORE OPERATION
Remote controller
Operation
display section
Temperature
Page 5
buttons
Operation
select button
Page 5
ECONO COOL
Page 7
button
i-save button
Page 7
Signal transmitting
section
Distance of signal :
About 6 m
Beep(s) is (are) heard from
the indoor unit when the
signal is received.
OFF/ON
(stop/operate) button
FAN speed control
Page 6
button
VANE control
Page 6
button
TIME, TIMER set
buttons Page 4, 7
Increase time
Decrease time
WEEKLY TIMER
set buttons
RESET button Page 4
Page 9
Before operation: Insert the power supply plug into the power outlet and/or
turn the breaker on.
Installing the remote controller batteries
4.
Press RESET.
1.
Remove the front lid.
2.
Insert the negative
pole of AAA
alkaline batteries rst.
3.
Install the front lid.
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.
CLOCK button
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Remote
controller holder
• Install the remote controller holder in a place
where the signal can be
received by the indoor
unit.
Lid
Slide the lid down
to open the remote
controller. Slide it down
further to get to the
weekly timer buttons.
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.
Setting current time
1.
Press CLOCK.
2.
4.
Press CLOCK again.
Note:
• Press CLOCK gently using a thin instrument.
Each press increases/decreas-
3.
Press the DAY button
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-4
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● OPERATING INSTRUCTIONS ●
SELECTING OPERATION MODES
AUTO mode (Auto change over)
The unit selects the operation mode according to the dierence 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.
COOL mode
Enjoy cool air at your desired temperature.
Note:
Do not operate COOL mode at very low outside temperatures (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.
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
Lit Not lit
About 2°C or more away
from set temperature
About 1 to 2°C from set
temperature
HEAT mode
Enjoy warm air at your desired 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.
EN-5
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FAN SPEED AND AIRFLOW DIRECTION ADJUSTMENT
Air outlet selection
Press to select the air outlet(s).
When 2 FLOW is selected, air blows from the top and
the front of the unit. When 1 FLOW is selected, air
blows only from the top of the unit.
(2 FLOW) (1 FLOW)
The multi-flow vane is automatically set to the appropriate position.
Even if 2 FLOW is selected, air will blow only from the top of the unit in
the following conditions:
• During COOL/DRY: The room temperature is close to set temperature.
The air conditioner has operated for 0.5 to 1 hour.
• During HEAT: The air flow temperature is low.
(During defrosting operation, start of operation, etc.)
Note:
Movement at the start of the 2 FLOW operation
• COOL/DRY, HEAT: It takes 0.5 to 1 minute to start the 2 FLOW operation.
• HEAT: When cold air blows out from the air outlet, the multi-ow vane may
stop moving for up to 10 minutes to make and blow out warm air.
Fan speed
Press to select fan speed. Each press changes
fan speed in the following order:
(AUTO) (Quiet) (Low) (Med.) (High) (Super High)
• Two short beeps are heard from the indoor unit when set to AUTO.
• Use higher fan speed to cool/heat the room quicker. It is recommended to lower the fan speed once the room is cool/warm.
• Use lower fan speed for quiet operation.
Up-down Airflow direction
Press to select vertical airow direction. Each
press will change airow direction in the following
order:
(AUTO) (1) (2) (3) (4) (SWING)
• Two short beeps will be heard from the indoor unit when set to AUTO.
• Moving the horizontal vane/multi-flow vane manually can cause trouble.
• The horizontal vane/multi-flow vane automatically moves in certain intervals to determine its position, and then it returns to the set position.
• When the air outlet is switched between 1 FLOW and 2 FLOW, the
horizontal vanes may move and change their positions.
Airflow direction
(AUTO) .......The vane will be set to the most ecient airow direction.
COOL/DRY/FAN (2 FLOW) : position (2)
COOL/DRY/FAN (1 FLOW) : position (1)
HEAT (2 FLOW) : position (2)
HEAT (1 FLOW) : position (3)
(Manual) .....For efficient air conditioning, select upper position for COOL/
DRY, and lower position for HEAT. During COOL/DRY, when
the vane is set to position (3) or (4), the vane automatically
moves to position (1) after 0.5 to 1 hour to prevent water dripping.
(Swing) .......The horizontal vane will move up and down intermittently.
Left-right Airflow direction
■ To change the horizontal airow direction.
Move the vertical vane manually before starting operation.
EN-6
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● OPERATING INSTRUCTIONS ●
I-SAVE OPERATION ECONO COOL OPERATION
A simplied set back function enables to recall the preferred (preset) setting with
a single push of the
the previous setting in an instance.
1
Press during COOL, or HEAT mode to select
button. Press the button again and you can go back to
i-save mode.
2
Set the temperature, fan speed, airow direction, and 2
FLOW/1 FLOW.
• 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, airflow direction, and 2
FLOW/1 FLOW according to your room.
• Normally, the minimum temperature setting in HEAT mode is 16°C.
However, during i-save operation only, the minimum temperature setting is 10°C.
Press again to cancel i-save operation.
• i-save operation also is cancelled when the MODE button is pressed.
Note:
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.
Swing airow (change of air ow) makes you feel cooler than stationary airow.
The set temperature and the airow direction are automatically changed by the
microprocessor.
It is possible to perform cooling operation with keeping comfort.
As a result energy can be saved.
Press during COOL mode page 5 to start
ECONO COOL operation.
The unit performs swing operation vertically in various cycles according to the
temperature airflow.
Press again to cancel ECONO COOL operation.
• ECONO COOL operation is also cancelled when the VANE button is
pressed.
T
IMER 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.
*
2
Press (Increase) and (Decrease) to set the
Page 4
time of timer.
Each press increases or decreases the set time by 10 minutes.
• Set the timer while
or is blinking.
EN-7
3
Press
or
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 8 “Auto restart
function”.
Page 9
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
Set temperature : 24°C
Fan speed : Medium
Horizontal vane : Auto
Air outlet : 2 FLOW
Emergency
operation
switch
(E.O. SW)
Emergency HEAT
Stop
Note:
• The rst 30 minutes of operation is test run. Temperature
control does not work, and fan speed is set to High. The air
outlet selection is set to 2 FLOW. Page 6
• In the emergency heating operation, the fan speed gradually rises to blow out warm air.
AUTO RESTART FUNCTION
If a power failure occurs or the main power is turned o during operation, “Auto
restart function” automatically starts operation in the same mode as the one set
with the remote controller just before the shuto 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.
EN-8
Page 10
● OPERATING INSTRUCTIONS ●
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
27°C
21:00
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.
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.
4
Press to complete and transmit the weekly timer
setting.
* which was blink-
ing goes out, and the
current time will be
displayed.
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.
2
Press and to select setting day and number.
E.g. : [Mon Tue ... Sun]
and [1] are selected.
Pressing selects the day of
the week to be set.
* All days can be selected.
Pressing selects
the setting number.
EN-9
Checking weekly timer setting
1
Press to enter the weekly timer setting mode.
* blinks.
2
Press or to view the setting of the particular
day or number.
Press to exit the weekly timer setting.
Page 11
CLEANING
Instructions:
• Switch o the power supply or turn o 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 neutral detergents.
• Do not expose parts to direct sunlight, heat, or 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.
Air cleaning lter
(Anti-Allergy Enzyme lter)
Back side of air lter
Clean every 3 months:
• Remove dirt by a vacuum cleaner.
When dirt cannot be removed by
vacuum cleaning:
• Soak the 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 lter for best
performance.
• Parts Number MAC-408FT-E
Air lter (Air purifying lter)
• Clean every 2 weeks
• Remove dirt by a vacuum cleaner, or rinse with water.
• After washing with water, dry it well in shade.
Front panel
1. Push down the tab on the both sides of the unit to open the front panel.
2. Pull the front panel toward you to remove it.
3. Open the front panel completely and then remove it.
• Wipe with a soft dry cloth or wash it with water.
• Do not soak it in water for more than two hours.
• Dry it well in shade before installing it.
4. Install the front panel by following the removal procedure in reverse.
Important
• Clean the lters regularly for best performance and to re-
duce power consumption.
• Dirty 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 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.
Indoor Unit
The unit cannot be operated. • Is the breaker turned on?
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 ow direction changes
during operation.
The direction of the horizontal
vane/multi-ow 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 multi-ow vane opens and
closes automatically.
The indoor unit which is not
operating becomes warm and a
sound, similar to water owing,
is heard from the unit.
The indoor unit discolors over
time.
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.
Symptom Explanation & Check points
• Is the power supply plug connected?
• Is the ON timer set?
• 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 ow temperature is too low or when defrosting is being
done, the horizontal vane is automatically set
to vertical position. The multi-ow vane is set to
the closed position.
• When the air conditioner is operated in COOL
or DRY mode, if the operation continues with air
blowing horizontally for 1 hour, the direction of
the air ow is automatically set to position (1)
to prevent condensed water from dropping. The
multi-ow vane is set to the closed position.
• The horizontal vane and the multi-ow vane
automatically moves in certain intervals to
determine its position, and then it returns to the
set 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 o 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 shuto of the main power.
Refer to “Auto restart function”. Page 8
• The multi-ow vane is automatically controlled
by a microcomputer according to the air ow
temperature and operation time of the air conditioner.
• A small amount of refrigerant continues to ow
into the indoor unit even though it is not operating.
• Although plastic turns yellow due to the inuence
of some factors such as ultraviolet light and
temperature, this has no eect on the product
functions.
• Are the batteries exhausted? Page 4
• Is the polarity (+, -) of the batteries correct?
Page 4
• Are any buttons on the remote controller of other
electric appliances being pressed?
Does not cool or heat
The room cannot be cooled or
heated suciently.
The room cannot be cooled
suciently.
The room cannot be heated
suciently.
Air does not blow out soon in
the heating operation.
Airow
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. • This sound is heard when the outside air is
Mechanical sound is heard from
the indoor unit.
The sound of water 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.
Symptom Explanation & Check points
• Is the temperature setting appropriate?
Page 5
• Is the fan setting appropriate? Please change
fan speed to High or Super High. Page 6
• Is the air outlet selection is set to 1 FLOW? Set
it to 2 FLOW.
• Is the lter clean? Page 10
• Is the fan or heat exchanger of the indoor unit
clean?
• 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.
• When a ventilation fan or a gas cooker is used
in a room, the cooling load increases, resulting
in an insucient cooling eect.
• When the outside temperature is high, the
cooling eect may not be sucient.
• When the outside temperature is low, the heat-
ing eect may not be sucient.
• Please wait as the unit is preparing to blow out
warm air.
• Is the lter clean? Page 10
• Is the fan or heat exchanger of the indoor unit
clean?
• 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 panel, etc. due to change in
temperature.
absorbed from the drain hose by turning on the
range hood or the ventilation fan, making water
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 switching sound in turning on/o the
fan or the compressor.
• This is the sound of refrigerant or condensed
water owing in the unit.
• This is the sound when the 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 9
• When a power failure occurs and the main
power turns o, 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 9
Page 6
EN-11
Page 13
WHEN YOU THINK THAT TROUBLE HAS OCCURRED
In the following cases, stop using the air conditioner and consult your dealer.
• When water leaks or drips from the indoor unit.
• When the left 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 uorescent lamp (inverter-type uorescent lamp, etc.) is used.
• Operation of the air conditioner interferes with radio or TV reception. An amplier may be required for the aected device.
• When an abnormal sound is heard.
• When any refrigerant leakage is found.
WHEN THE AIR CONDITIONER IS NOT
GOING TO BE USED FOR A LONG TIME
1
Set to the highest temperature in manual COOL mode,
and operate for 3 to 4 hours. Page 5
• This dries the inside of the unit.
• Moisture in the air conditioner contributes to favorable conditions for
growth of fungi, such as mold.
2
3
Press
Do not turn the breaker OFF except the case of burning
smell, or when performing maintenance or inspection.
The refrigerant leakage cannot be detected, and this
may cause a re.
4
Remove all batteries from the remote controller.
When using the air conditioner again:
1
Clean the air lter. Page 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.
to stop the operation.
INSTALLATION PLACE AND
ELECTRICAL WORK
Installation place
Avoid installing the air conditioner in the following places.
• Where there is much machine oil.
• Salty places such as the seaside.
• Where sulde gas is generated such as hot spring, sewage, waste water.
• Where oil is splashed or where the area is lled with oily smoke (such as cook-
ing 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.
• Do not install the indoor unit at a place higher than 150 mm.
• Do not operate the air conditioner during interior construction and nishing
work, or while waxing the 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 aected device if operation of the air conditioner
interferes with radio or TV reception.
For the optimum eciency
and to extend the life time of
using, the outdoor unit should
100 mm
or more
TV
3 m or
more
be installed in a well-ventilated
dry place.
Keep a space
to prevent the
picture distortion
or the noise.
500 mm
or more
wall, etc.
To prevent the eects
of a uorescent lamp,
keep as far apart as
possible.
Cordless phone
or portable
phone
1 m
or more
1 m
or more
Inverter-type
uorescent lamp
Radio
4
Refer to the “PREPARATION BEFORE OPERATION”,
and follow the instructions. Page 4
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.
EN-12
Page 14
● OPERATING INSTRUCTIONS ●
SPECIFICATIONS
Model
Function Cooling Heating Cooling Heating Cooling Heating
Power supply ~ /N, 230V, 50Hz
Capacity kW 2.5 3.4 3.5 4.3 4.2 5.4
Input kW 0.57 0.78 0.87 1.14 1.11 1.43
Weight
Refrigerant lling capacity(R32) kg 1.0
IP code
Permissible excessive
operating pressure
Noise level
Model
Function Cooling Heating Cooling Heating Cooling Heating Cooling Heating
Power supply ~ /N, 230V, 50Hz
Capacity kW 5.0 5.8 5.0 5.8 6.1 6.5 6.1 6.5
Input kW 1.32 1.53 1.32 1.53 1.73 1.88 1.73 1.88
Weight
Refrigerant lling capacity(R32) kg 1.3
IP code
Permissible excessive
operating pressure
Noise level
Indoor MFZ-KW25VG-A1 MFZ-KW35VG-A1 MFZ-KW42VG-A1
Outdoor MUFZ-KW25VG-A1 MUFZ-KW35VG-A1 MUFZ-KW42VG-A1
Indoor kg 15
Outdoor kg 35
Indoor IP 20
Outdoor IP 24
LP ps Mpa 2.77
HP ps Mpa 4.17
Indoor(Super High/
High/Med./Low./Quiet)
Outdoor dB(A) 48 46 48 47 48 47
Indoor MFZ-KW50VG-A1 MFZ-KW60VG-A1
Outdoor MUFZ-KW50VG-A1 MUFZ-KW50VGHZ-A1 MUFZ-KW60VG-A1 MUFZ-KW60VGHZ-A1
Indoor kg 15
Outdoor kg 54
Indoor IP 20
Outdoor IP 24
LP ps Mpa 2.77
HP ps Mpa 4.17
Indoor(Super High/
High/Med./Low./Quiet)
Outdoor dB(A) 53 56 53 56 53 56 53 56
dB(A)
dB(A)
44/38/32/
26/20
44/39/35/
31/27
50/45/40/
35/29
44/38/31/
25/18
44/39/35/
31/27
44/38/32/
26/20
50/45/40/
35/29
44/38/31/
25/18
53/46/39/
35/27
51/43/36/
51/47/41/
35/29
28/20
53/46/39/
35/27
51/44/36/
27/18
51/47/41/
35/29
Guaranteed operating range
Upper limit
Cooling
Lower limit
Upper limit
Heating
Lower limit
Indoor
32°C DB
23°C WB
21°C DB
15°C WB
27°C DB
—
20°C DB
—
MUFZ-
KW25/35/42/50/60VG
46°C DB
—
-10°C DB
—
24°C DB
18°C WB
-15°C DB
-16°C WB
Outdoor
MUFZ-
KW50/60VGHZ
46°C DB
—
-10°C DB
—
24°C DB
18°C WB
-25°C DB
-26°C WB
DB: Dry Bulb
WB: Wet Bulb
Note:
Rating condition
Cooling — Indoor: 27°C DB, 19°C WB
Outdoor: 35°C DB
Heating — Indoor: 20°C DB
Outdoor: 7°C DB, 6°C WB
EN-13
Page 15
Page 16
HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN
RH79A055H01
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