Hitachi RAD-18NHA1 User manual

– 1 –
ENGLISH
SPLIT TYPE AIR CONDITIONER
INDOOR UNIT
MODEL
RAD-18NHA1
RAD-25NHA1
RAD-35NHA1
RAD-50NHA1
Instruction manual Page 1~22
To obtain the best performance and ensure years of trouble free use, please read this instruction manual completely.
INDOOR UNIT
RAD-18NHA1
RAD-25NHA1
RAD-35NHA1
RAD-50NHA1

–2 –
!
SAFETY PRECAUTION
●
Please read the “Safety Precaution”carefully before operating the unit to ensure correct usage of the unit.
●
Pay special attention to signs of “Warning”and “Caution”. The “Warning”section contains matters which,
if not observed strictly, may cause death or serious injury. The “Caution”section contains matters which may
result in serious consequences if not observed properly. Please observe all instructions strictly to ensure safety.
●
The sign indicate the following meanings.
●
Please keep this manual after reading.
WARNING
PRECAUTIONS DURING INSTALLATION
●Do not reconstruct the unit.
Water leakage, fault, short circuit or fire may occur if you reconstruct the
unit by yourself.
●Please ask your sales agent or qualified technician for the installation of
your unit. Water leakage, short circuit or fire may occur if you install the unit
by yourself.
●Please use earth line.
Do not place the earth line near water or gas pipes, lightning-conductor, or
the earth line of telephone. Improper installation of earth line may cause
electric shock.
●A circuit breaker should be installed depending on the mounting site of the
unit. Without a circuit breaker, the danger of electric shock exists.
●Do not install near location where there is flammable gas. The outdoor unit
may catch fire if flammable gas leaks around it.
●Please ensure smooth flow of water when installing the drain hose.
CAUTION
!
!
PRECAUTIONS DURING SHIFTING OR MAINTENANCE
PRECAUTIONS DURING OPERATION
●Avoid an extended period of direct air flow for your health.
W
A
R
N
I
N
G
!
●Should abnormal situation arises (like burning smell), please stop operating the unit
and turn off the circuit breaker. Contact your agent. Fault, short circuit or fire may
occur if you continue to operate the unit under abnormal situation.
●Please contact your agent for maintenance. Improper self maintenance may cause
electric shock and fire.
●Please contact your agent if you need to remove and reinstall the unit. Electric
shock or fire may occur if you remove and reinstall the unit yourself improperly.
●If the supply cord is damaged, it must be replaced by the special cord obtainable
at authorized service/parts centers.
●Do not insert 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. Before cleaning, be sure
to stop the operation and turn the breaker OFF.
●During thunder storm, disconnect and turn off the circuit breaker.
●Do not use any conductor as fuse wire, this could cause fatal accident.
!
Make sure to connect earth line.
Indicates the instructions that must be followed.
The sign in the figure indicates prohibition.
W
A
R
N
I
N
G
!

–3 –
ENGLISH
PRECAUTIONS DURING OPERATION
●Do not attempt to operate the unit with wet hands, this could cause fatal
accident.
●When operating the unit with burning equipments, regularly ventilate the
room to avoid oxygen insufficiency.
●Do not direct the cool air coming out from the air-conditioner panel to face
household heating apparatus as this may affect the working of apparatus
such as the electric kettle, oven etc.
●Do not place plants directly under the air flow as it is bad for the plants.
●Please ensure that outdoor mounting frame is always stable, firm and
without defect. If not, the outdoor unit may collapse and cause danger.
●Do not splash or direct water to the body of the unit when cleaning it as this
may cause short circuit.
●When operating the unit with the door and windows opened, (the room humidity is always above
80%) and with the air deflector facing down or moving automatically for a long period of time,
water will condense on the air deflector and drips down occasionally. This will wet your furniture.
Therefore, do not operate under such condition for a long time.
●If the amount of heat in the room is above the cooling or heating capability of the unit (for
example: more people entering the room, using heating equipments and etc.), the preset room
temperature cannot be achieved.
●This appliance is not intended for use by young children or infirm persons unless they have been
adequately supervised by a responsible person to ensure that they can use the appliance safely.
●Young children should be supervised to ensure that they do not play with the appliance.
●Do not climb on the outdoor unit or put objects on it.
●Please switch off the unit and turn off the circuit breaker during cleaning, the
high-speed fan inside the unit may cause danger.
●Turn off the circuit breaker if the unit is not to be operated for a long period.
C
A
U
T
I
O
N
!
●The product shall be operated under the manufacturer specification and
not for any other intended use.
●Do not put water container (like vase) on the indoor unit to avoid water
dripping into the unit. Dripping water will damage the insulator inside the unit
and causes short-circuit.
●Do not use any aerosol or hair sprays near the indoor unit. This chemical
can adhere on heat exchanger fin and blocked the evaporation water flow
to drain pan. The water will drop on tangential fan and cause water splashing
out from indoor unit.

–4 –
MULTI-AIR CONDITIONER
With this multi-air conditioner, several indoor units can be connected to one outdoor unit to be driven. You
can operate the required number of indoor units.
Combination of Operations:
●You cannot operate the indoor units in
the following combinations. ●The indoor unit which is switched on first continues
to operate, but other indoor units which is switched
on later does not operate while the lamp lights.
●To re-start an indoor unit which was operated later,
stop the indoor unit which was operated first or
later and reset the type of operation, then perform
operation again.
One unit
Heating
Other unit
Cooling
Dehumidifying
Circulating (fan)
Adjusting the Number of Indoor
Units:
Decrease the number of
indoor units to be operated
especially when it is very
hot or cold or when you
want to reach the present
temperature quickly.
Stopped Indoor Units:
When an indoor unit is operated in the
cooling, heating or dehumidifying mode in
the room, the sound of refrigerant flow may
be heard from a stopped indoor unit or a
stopped indoor unit may become warm.
This is because the indoor unit returns
refrigerant to the outdoor unit to be ready
for operation.
When operation mode is selected:
●When heating operation is automatically selected for the first indoor unit, the next indoor unit will then
start to heat. Also, if cooling or dehumidifying is automatically selected for the first indoor unit, the next
indoor unit will also start to cool or dehumidify.
During automatic operation:

–5 –
ENGLISH
INDOOR UNIT
NAMES AND FUNCTIONS OF EACH PART
WIDTH (mm)
750
MODEL
RAD-18NHA1/RAD-25NHA1/RAD-35NHA1/RAD-50NHA1
HEIGHT (mm)
235
DEPTH (mm)
400
MODEL NAME AND DIMENSIONS
INDOOR UNIT INDICATORS
TEMPORARY SWITCH
Use this switch to start and stop when the remote controller does
not work. Normally do not use this button.
TIMER LAMP
This lamp lights when the timer is working.
OPERATION LAMP
This lamp lights during operation.
During heating, the operation indicator may blink, blowing very
lightly or totally stopping under the following conditions:
(1) During preheating (heating operation)
For about 2–3 minutes after starting up.
(2) During defrosting (heating operation)
Defrosting will be performed about once an hour when frost
forms on the heat exchanger of the outdoor unit, for 5–10
minutes each time. (If the piping length used is longer than
usual, frost will likely to form.)

–6 –
AUTO
HEAT
DEHUMIDIFY
COOL
FAN
FAN SPEED
LOW
MED
HI
SLEEPING
STOP (CANCEL)
START (RESERVE)
START/STOP
TIME
TIMER SET
TIMER SELECTOR
ON TIMER
OFF TIMER
AUTO SWING
˚
CH
RESET
˚
CH
NAMES AND FUNCTIONS OF REMOTE CONTROL UNIT
REMOTE CONTROLLER
●This controls the operation of the indoor unit. The range of control is about 7 meters. If indoor lighting is controlled
electronically, the range of control may be shorter.
This unit can be fixed on a wall using the fixture provided. Before fixing it, make sure the indoor unit can be controlled
from the remote controller.
●Handle the remote controller with care. Dropping it or getting it wet may compromise its signal transmission capability.
●After new batteries are inserted into the remote controller, the unit will initially require approximately 10 seconds to
respond to commands and operate.
●Signal emitting window/transmission sign
Point this window toward the indoor unit when controlling it.
The transmission sign blinks when a signal is sent.
●Display
This indicates the room temperature selected, current time, timer status, function
and intensity of circulation selected.
●START/STOP button
Press this button to start operation. Press it again to stop operation.
●SLEEP button
Use this button to set the sleep timer.
●TEMPERATURE buttons
Use these buttons to raise or lower the temperature setting. (Keep pressed, and
the value will change more quickly.)
●TIME button
Use this button to set and check the time and date.
●RESET buttons
●FUNCTION selector
Use this button to select the operating mode. Every time you press it,
the mode will change from (AUTO) to (HEAT) to (DEHUMIDIFY) to
(COOL) and to (FAN) cyclically.
●FAN SPEED selector
This determines the fan speed. Every time you press this button, the intensity
of circulation will change from (AUTO) to (HI) to (MED) to (LOW)
(This button allows selecting the optimal or preferred fan speed for each operation
mode).
●AUTO SWING button
Controls the angle of the horizontal air deflector.
●TIMER control
Use this button to set the timer.
●OFF-TIMER button Select the turn OFF time.
●ON-TIMER button Select the turn ON time.
●RESERVE button Time setting reservation.
●CANCEL button Cancel time reservation.
Precautions for Use
●Do not put the remote controller in the following places.
●Under direct sunlight.
●In the vicinity of a heater.
●Handle the remote controller carefully. Do not drop it on the floor,
and protect it from water.
●Once the outdoor unit stops, it will not restart for about 3 minutes
(unless you turn the power switch off and on or unplug the power
cord and plug it in again).
This is to protect the device and does not indicate a failure.
●If you press the FUNCTION selector button during operation, the
device may stop for about 3 minutes for protection.

–7 –
ENGLISH
RESET
AUTOMATIC OPERATION
The device will automatically determine the mode of operation, HEAT, COOL or DEHUMIDIFY depending on the current room
temperature. The selected mode of operation will change when the room temperature varies. However the mode of operation will
not change when indoor unit connected to multi type outdoor unit.
■As the settings are stored in memory in the remote controller, you only have
to press the (START/STOP) button next time.
Press the FUNCTION selector so that the display indicates the (AUTO)
mode of operation.
●When AUTO has been selected, the device will automatically determine
the mode of operation, HEAT, COOL or DEHUMIDIFY depending on
the current room temperature. However the mode of operation will
not change when indoor unit connected to multi type outdoor unit.
●If the mode automatically selected by the unit is not satisfactory,
manually change the mode setting (heat, dehumidify, cool or fan).
Press the (START/STOP) button.
Operation starts with a beep.
Press the button again to stop operation.
You can raise or lower the temperature setting as necessary by maximum of
3°C.
Press the temperature button and the temperature
setting will change by 1°C each time.
●The preset temperature and the actual room temperature may vary
somewhat depending on conditions.
●The display does not indicate the preset temperature in the AUTO mode.
If you change the setting, the indoor unit will produce a beep.
1
START
STOP
°C
Press the (FAN SPEED) button, AUTO and LOW is available.
VARIOUS FUNCTIONS
■Auto Restart Control
●If there is a power failure, operation will be automatically restarted when the power is resumed with previous operation mode
and airflow direction.
(As the operation is not stopped by remote controller.)
●If you intend not to continue the operation when the power is resumed, switch off the power supply.
When you switch on the circuit breaker, the operation will be automatically restarted with previous operation mode and airflow
direction.
Note: 1. If you do not require Auto Restart Control, please consult your sales agent or OFF by remote control.
2. Auto Restart Control is not available when Timer or Sleep Timer mode is set.

–8 –
˚
C
RESET
˚
C
HEATING OPERATION
●Use the device for heating when the outdoor temperature is under 21°C.
When it is too warm (over 21°C), the heating function may not work in order to protect the device.
●In order to keep reliability of the device, please use this device above -15°C of the outdoor temperature.
Press the FUNCTION selector so that the display indicates
(HEAT).
Set the desired FAN SPEED with the (FAN SPEED) button
(the display indicates the setting).
(AUTO): The fan speed is HI at first and varies to
MED or LOW automatically when the preset
temperature has been reached.
(HI) : Economical as the room will become warm
quickly.
But you may feel a chill at the beginning.
(MED) : Fan speed slow.
(LOW) : Fan speed slower.
Set the desired room temperature with the TEMPERATURE
buttons (the display indicates the setting).
The temperature setting and the actual room temperature may
vary somewhat depending on conditions.
Press the (START/STOP) button. Heating operation starts
with a beep. Press the button again to stop operation.
■As the settings are stored in memory in the remote controller, you only
have to press the (START/STOP) button next time.
1
2
3
START
STOP

–9 –
ENGLISH
DEHUMIDIFYING OPERATION
Use the device for dehumidifying when the room temperature is over 16°C.
When it is under 15°C, the dehumidifying function will not work.
■Dehumidifying Function
When the room temperature is higher than the temperature setting: The device will dehumidify the room,
reducing the room temperature to the preset level.
When the room temperature is lower than the temperature setting: Dehumidifying will be performed at
the temperature setting slightly lower than the current room temperature, regardless of the temperature
setting. The function will stop (the indoor unit will stop emitting air) as soon as the room temperature
becomes lower than the setting temperature.
Set the desired room temperature with the TEMPERATURE
button (the display indicates the setting).
The range of 20-26˚C is recommended as
the room temperature for dehumidifying.
Press the (START/STOP) button. Dehumidifying operation
starts with a beep. Press the button again to stop operation.
2
■As the settings are stored in memory in the remote controller, you
only have to press the (START/STOP) button next time.
START
STOP
Press the FUNCTION selector so that the display indicates
(DEHUMIDIFY).
The FAN SPEED is set at LOW automatically.
The FAN SPEED button does not work.
1
RESET
˚
C
˚
C

–10 –
˚
C
RESET
˚
C
COOLING OPERATION
Use the device for cooling when the outdoor temperature is – 10 ~ 43°C.
If in doors humidity is very high (80%), some dew may form on the air outlet grille of the indoor unit.
Press the FUNCTION selector so that the display indicates
(COOL).
Set the desired FAN SPEED with the (FAN SPEED) button
(the display indicates the setting).
(AUTO): The FAN SPEED is HI at first and varies to
MED or LOW automatically when the preset
temperature has been reached.
(HI) : Economical as the room will become cool
quickly.
(MED) : Fan speed slow.
(LOW) : Fan speed slower.
Set the desired room temperature with the TEMPERATURE
button (the display indicates the setting).
The temperature setting and the actual room temperature may
vary some how depending on conditions.
Press the (START/STOP) button. Cooling operation starts
with a beep. Press the button again to stop operation. The
cooling function does not start if the temperature setting is
higher than the current room temperature (even though the
(OPERATION) lamp lights). The cooling function will start as
soon as you set the temperature below the current room
temperature.
■As the settings are stored in memory in the remote controller, you
only have to press the (START/STOP) button next time.
1
2
START
STOP
3

–11 –
ENGLISH
RESET
FAN SPEED (AUTO) ..... When the AUTO fan speed mode is set in the cooling/heating operation:
For the heating operation
●The fan speed will automatically change according to the temperature
of discharged air.
●When the difference of room temperature and setting temperature is
large, fan starts to run at HI speed.
●When the room temperature reaches setting temperature, fan speed
changes to LOW automatically.
●When the difference of room temperature and setting temperature is
large, fan starts to run at HI speed.
●After room temperature reaches the preset temperature, the cooling
operation, which changes the fan speed and room temperature to obtain
optimum conditions for natural healthful cooling will be performed.
For the cooling operation
FAN OPERATION
You can use the device simply as an air circulator. Use this function to dry the interior of the indoor
unit at the end of summer.
Press the FUNCTION selector so that the display indicates
(FAN).
Press the (FAN SPEED) button.
Press the (START/STOP) button. Fan operation starts with
a beep. Press the button again to stop operation.
1
2
START
STOP

–12 –
HOW TO SET THE TIMER
ON/OFF-Timer
●The device will turn on (off) and off
(on) at the designated times.
●The switching occurs first at the
preset time that comes earlier.
●The arrow mark appearing on the
display indicates the sequence of
switching operations.
1 Press the (ON-OFF)
button so that the (OFF)
mark blinks.
OFF-Timer
You can set the device to turn off
at the present time.
After you change the
batteries;
How to Cancel Reservation
Point the signal window of the remote controller toward the indoor unit, and press the (CANCEL)
button.
The (RESERVED) sign goes out with a beep and the (TIMER) lamp turns off on the indoor unit.
1 Set the current month and
day with the TIMER control
button.
1 Press the (OFF-TIMER)
button. The (OFF) mark blinks
on the display.
1 Press the (ON-TIMER)
button the (ON) mark blinks
on the display.
2 Set the turn-off time
with the TIMER control
button.
Press the (RESERVE)
button.
3 Press the (ON-
TIMER) button so that the
(OFF) mark lights and
the (ON) mark blinks.
NOTE
You can set only one of the OFF-timer,
ON-timer and ON/OFF-timer.
ON-Timer
Time, Day, Month
●The device will turn on
at the designated times.
TIME, DAY,
MONTH
(current time,
day, month)
OFF TIMER
ON TIMER
RESERVE
CANCEL
M D
M D
AM
STOP
Start
AM
Start
Stop
PM
Start Stop
PM
AM
PM
RESET

–13 –
ENGLISH
3 Point the signal window of the remote controller toward the indoor unit, and
press the (RESERVE) button.
The (OFF) mark starts lighting instead of flashing and the sign (RESERVED)
lights. A beep occurs and the (TIMER) lamp lights on the indoor unit.
●The time indication will disappear
automatically in 10 second.
●To check the current time setting,
press the (TIME) button twice.
The setting of the current time is
now complete.
●The timer may be used in three ways: off-timer, on-timer, and ON/OFF (OFF/ON)-timer. Set
the current time at first because it serves as a reference.
●As the time settings are stored in memory in the remote controller, you only have to press
the (RESERVE) button in order to use the same settings next time.
2 Press the
(TIME) button.
3 Set the current time with the
TIMER control button.
Example: The current time is 1:30 p.m.
2 Set the turn-off time with the
TIMER control button.
The setting of turn-off time is now complete.
Example: The device will turn off at 11:00p.m.
Example:
The device will turn on at 7:00 a.m.
The setting of the turn-on time is now complete.
4 Set the turn-on time with the
TIMER control button.
5 Point the signal window of the remote controller toward the indoor unit, and
press the (RESERVE) button.
The (ON) mark starts lighting instead of flashing and the (RESERVED) sign
lights. A beep occurs and the (TIMER) lamp lights on the indoor unit.
3 Point the signal window of the remote controller toward the indoor unit, and
press the (RESERVE) button.
The (ON) mark starts lighting instead of flashing and the (RESERVED) sign
lights. A beep occurs and the (TIMER) lamp lights on the indoor unit.
2 Set the turn-on time with the
TIMER control button.
Example:
The device will turn off at 10:30 p.m. and it will be turned on
at 7:00 a.m.
The settings of the turn-on/off times are now complete.
4 Press the (TIME) button again.
The time indication starts lighting
instead of flashing.
PM PM
AM PM
PM
PM
AM AM
AM
AM
PM
PM

–14 –
HOW TO SET THE SLEEP TIMER
1 Set the ON-timer.
Set the current time at first if it is not set before (see the pages for setting
the current time). Press the (SLEEP) button, and the display changes as
shown below.
Mode
Sleep timer
Indication
1 hour 2 hours 3 hours 7 hours
Sleep timer off
44 44
1
Sleep Timer: The device will continue working for the designated
number of hours and then turn off.
Point the signal window of the remote controller toward the indoor
unit, and press the SLEEP button.
The timer information will be displayed on the remote controller.
The TIMER lamp lights with a beep from the indoor unit. When the
sleep timer has been set, the display indicates the turn-off time.
Example: If you set 3 hours sleep
time at 11:38 p.m., the turn-off
time is 2:38 a.m.
2 Press the (SLEEP) button and set the sleep timer.
The device will be turned off by the sleep
timer and turned on by on-timer.
How to Cancel Reservation
Point the signal window of the remote controller toward the indoor unit, and press the (CANCEL)
button.
The (RESERVED) sign goes out with a beep and the (TIMER) lamp turns off on the indoor unit.
For heating:
In this case, the device will turn off
in 2 hours (at 1:38 a.m.) and turn
on early so that the preset
temperature will be almost reached
at 6:00 next morning.
SLEEP
H
H
AM
AM
Sleep
timer Start
H

–15 –
ENGLISH
Explanation of the sleep timer
The device will control the FAN SPEED and room temperature
automatically so as to be quiet and good for people’s health.
●If date or current time is not set, sleep timer can not be set.
●If you set the sleep timer after the off-, on/off- or off/on-timer
has been set, the sleep timer becomes effective instead of
the off-, on/off- or off/on-timer set earlier.
●You can not set other timer during sleep timer operation.
●After sleep timer time is up and when press sleep button
again, the sleep timer will be set as last setting.
●Sleep timer effective only once.
NOTE

– 16 –
ADJUSTING THE AIR DEFLECTOR
2. FULL DUCT • SEMI DUCT
●If the “ (AUTO SWING)” button is pressed once, the
horizontal air deflector swings up and down. If the button
is pressed again, the deflector stops in its current
position.
●Use the horizontal air deflector within the adjusting range
shown on the right.
●When the auto swing operation is performed, if the
horizontal air deflector is moved manually, the swing
range may drift. However, it will return to the original
operation range after a short time.
!
CAUTION
●When operating the unit in cooling operation with the air deflector facing down and moving automatically
for a long period of time, water will condensed on the air deflector and drips down occasionally. This
will wet your furniture.
RESET
1. NON DUCT
Adjustment of the conditioned air in the upward and downward
directions.
According to “Dehumidifying” or “Cooling” operation, the
horizontal air deflector is automatically set to the proper angle
suitable for each operation. The deflector can be swing up
and down and also set to the desired angle using the
“ (AUTO SWING)” button. (If the angle of the deflector is
changed, it will not return to the auto-set position after
operations start unless the operation mode is switched.)
●As shown in the diagram, perform by holding the horizontal
air deflector.
●When adjusting the air direction, use a stepladder, etc.
●For full duct type and semi duct type, auto air deflector is
not provided.

–17 –
ENGLISH
HOW TO EXCHANGE THE BATTERIES IN THE REMOTE CONTROLLER
1
Remove the cover as shown in the figure and take out the
old batteries.
=
2
Install the new batteries.
The direction of the batteries should match the marks in the
case.
1. Do not use new and old batteries, or different kinds of batteries
together.
2. Take out the batteries when you do not use the remote
controller for 2 or 3 months.
CAUTION
!
Push and pull to
the direction of
arrow mark .
Cover
TEMPORARY SWITCH
Use the temporary switch when operation cannot be done with the
remote controller.
1. By pressing the temporary switch, the operation is done in
previously set operation mode.
When the operation is done using the temporary switch after the
power source is turned off and turned on again, the operation is
done in automatic mode.
2. When the operation is stopped or when the operation is done with
the remote controller again. Press the temporary switch once again.
CIRCUIT BREAKER
When you do not use the room air conditioner, set the circuit breaker to “OFF”.
HOW TO USE THE AIR CONDITIONER EFFECTIVELY
1. An average room temperature setting is probably the best for you as well as
being economical.
Excessive cooling or heating is not recommended for health reasons. High electricity
bills may also result.
Close the curtains or blinds to prevent heat from flowing into or escaping the room
as well as to make more effective use of electricity.
2. At intervals, the doors and windows should be opened to let fresh air in.
Make sure the room is ventilated when operating the air conditioner
at the same time as other heating appliances.
3. Using the timer is recommended before going to sleep or going out.
4. The following must never be used for cleaning the indoor and outdoor units.
Benzine, thinner and scrub can damage plastic surfaces or coating.
Hot water above 40°C can shrink the filter and deform plastic parts.
5. Do not block the air intake and air outlet.
Do not block the air outlets and intakes of the indoor and outdoor units with curtains
or other obstacles which could degrade air conditioner performance and cause unit
failure.
CAUTION
!

–18 –
Suitable Room Temperature Install curtain or blinds
Ventilation Effective Usage Of Timer
Do Not Forget To Clean The Air Filter Please Adjust Suitable Temperature
For Baby And Children
Warning
Freezing temperature
is bad for health and a
waste of electric power.
!
It is possible to
reduce heat
entering the
room through
windows.
At night, please use the “OFF or ON timer
operation mode”, together with your wake up
time in the morning. This will enable you to
enjoy a comfortable room temperature. Please
use the timer effectively.
Dusty air filter will reduce the air volume and
the cooling efficiency. To prevent from wasting
electric energy, please clean the filter every 2
weeks.
Please pay attention to the room temperature
and air flow direction when operating the unit
for baby, children and old folks who have
difficulty in movement.
Caution
Do not close the room for a long period of
time. Occasionally open the door and windows
to allow the
entrance of
fresh air.
!
THE IDEAL WAYS OF OPERATION

–19 –
ENGLISH
FOR USER’S INFORMATION
The Air Conditioner And The Heat Source In The Room
Not Operating For A Long Time
When Lightning Occurs
Caution
If the amount of heat in the room is above the cooling
capability of the air conditioner (for example: more
people entering the room, using heating equipments
and etc.), the preset room temperature cannot be
achieved.
!
When the indoor unit is not to be used for a long
period of time, please switch off the power from the
mains. If the power from mains remains “ON”, the
indoor unit still consumes about 8W in the operation
control circuit even if it is in “OFF”mode.
Warning
To protect the whole unit during lightning, please
stop operating the unit and remove the plug from the
socket.
!
OFF
Interference From Electrical Products
Caution
To avoid noise interference, please place the indoor
unit and its remote controller at least 1m away from
electrical products.
!
Inverter-type
fluorescent
lamp.
To prevent
interference,
place at least
1m away.
TV

–20 –
MAINTENANCE
●Before cleaning, stop unit operation with the remote controller and turn off the circuit breaker.
!
WARNING
1
Remove suction grille before removing filter.
●Lift up one side of suction grille and remove by inclining it
(refer to diagram).
●Press claw downward to remove filter.
PROCEDURE
●Do not expose the unit to water as it may cause an electric shock.
●For cleaning inside the air conditioner, consult your sales agent.
●Avoid using detergent when cleaning the heat exchanger of the indoor unit. Unit failure may result.
●When cleaning the heat exchanger with a vacuum cleaner, make sure to wear gloves so as not to injure
your hands on the heat exchanger fins.
!
CAUTION
1. AIR FILTER
Clean the air filter, as it removes dust inside the room. Be sure to clean
the filter once every two weeks so as not to consume electricity
unnecessarily.
2
Remove dust from the filter using a vacuum cleaner. If there is
too much dust, use neutral detergent. After using neutral
detergent, wash with clean water and dry in the shade.
3
Install the filters.
Slightly lift the suction grille and close as original state.
!
CAUTION
●Do not wash with hot water at more than 40°C. The filter may shrink.
●When washing it, shake off moisture completely and dry it in the shade; do not expose it directly to
the sun. The filter may shrink.
●Do not operate the air conditioner with the filter removed. Dust may enter the air conditioner and
cause trouble.
2. CLEANING OF SUCTION GRILLE
●Wipe it with a soft dry cloth.
●When it is excessively dirty, wipe with soft cloth soaked in lukewarm water or neutral detergent. Then wipe
thoroughly with a soft dry cloth.
!
CAUTION
●Never clean with hot water (above 40°C), benzine, gasoline, acid, thinner
or a brush, because it will damage the plastic surface and the coating.
3. MAINTENANCE AT BEGINNING OF LONG OFF PERIOD
●Running the unit setting the operation mode to (FAN) and the fan speed to HI for
about half a day on a fine day, and dry the whole of the unit.
●Turn off the circuit breaker.