Hitachi RAF-25NXA1, RAC-25NXA1, RAF-35NXA1, RAC-35NXA1, RAF-50NXA1 Instruction Manual

INDOOR UNIT/OUTDOOR UNIT

MODEL

RAF-25NXA1 / RAC-25NXA1
RAF-35NXA1 / RAC-35NXA1
RAF-50NXA1 / RAC-50NXA1

OUTDOOR UNIT FOR
SINGLE SPLIT MODEL

RAF-25NXA1
RAF-35NXA1
RAF-50NXA1

Instruction manual

Page 1~22

To obtain the best performance and ensure years of trouble free use, please read this instruction manualcompletely.

SPLIT TYPE AIR CONDITIONER

RAC-50NXA1

INDOOR UNIT

RAC-25NXA1
RAC-35NXA1

– 2 –

PRECAUTIONS DURING OPERATION

WARNING

WARNING

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 signs indicate the following meanings. (The following are examples of signs.)

• Please keep this manual after reading.

• 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 or fire.

• Be sure to use the specified piping set for R410A. Otherwise, this may result in
broken copper pipes or faults.

• 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 the unit near a location where there is flammable gas. The outdoor unit
may catch fire if flammable gas leaks around it. Piping shall be suitable supported
with a maximum spacing of 1m between the supports.

• Please ensure smooth flow of water when installing the drain hose.

• Make sure that a single phase 220V or 230V or 240V power source is used.

The use of other power sources may cause electrical components to overheat and
lead to fire.

PRECAUTIONS DURING INSTALLATION

PROHIBITION

CONNECT EARTH LINE

PROHIBITION

PROHIBITION

WARNING

CAUTION

• Avoid an extended period of direct air flow for your health.

• Should abnormal situation arise (like burning smell), please stop operating the unit

and remove plug from the socket. 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.

PRECAUTIONS DURING SHIFTING OR MAINTENANCE

• Do not use any conductor as fuse wire, this could cause fatal accident.

• During thunder storm, disconnect the plug top and turn off the circuit breaker.

• Do not put objects like thin rods into the panel of blower and suction side because

the high-speed fan inside may cause danger.

• Spray cans and other combustibles should not be located within a meter of the air
outlets of both indoor and outdoor units.
As a spray can’s internal pressure can be increased by hot air, a rupture may result.

PROHIBITION

PROHIBITION

PROHIBITION

PROHIBITION

"OFF"

This sign in the figure indicates prohibition. Indicates the instructions that must be followed.

"OFF"

– 3 –

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• Do not place plants directly under the air flow as it is bad for the plants.

• 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.

• The product shall be operated under the manufacturer specification and not for any
other intended use.

PRECAUTIONS DURING OPERATION

CAUTION

• 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.

• 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 wash the unit with water or place a water container such as a vase on the
indoor unit.
Electrical leakage could be present and cause electric shock.

• Be sure to stop the operation by using the remote controller 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 be operated for a long period.

• Do not climb on the outdoor unit or put objects on it.

• 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.

• Indoor unit cleaning must be performed by authorized personnel only. Consult your
sales agent.
Using a commercially available detergent or similar can damage the plastic parts
or clog the drain pipe, causing water to drip with potential electric shock hazard.

• Do not touch the air outlet, bottom surface and aluminum fin of the outdoor
unit.
You may get hurt.

• Do not touch the refrigerant pipe and connecting valve.
Burns may result.

PROHIBITION

DON'T WET

PROHIBITION

PROHIBITION

PROHIBITION

DON’T TOUCH

"OFF"

PROHIBITION

PROHIBITION

PROHIBITION

PROHIBITION

PROHIBITION

DON’T TOUCH

STRICTLY OBSERVE

PRECAUTIONS

"OFF"

• 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 this appliance safely.

• Young children should be supervised to ensure that they do not play with the appliance.

– 4 –

NAMES AND FUNCTIONS OF EACH PART

MODEL NAME AND DIMENSIONS

INDOOR UNIT

Indoor unit
indicators

Horizontal air
deflector

Air filter

Front panel

Signal receiver

OUTDOOR UNIT FOR

SINGLE SPLIT MODEL

Remote controller

* OUTDOOR UNIT for single split model.

MODEL WIDTH HEIGHT DEPTH

RAF-25NXA1
RAF-35NXA1

760mm 600mm 235mm

RAF-50NXA1

(INDOOR UNIT)

RAC-25NXA1* 750mm 548mm 288mm

RAC-35NXA1* 750mm 548mm 288mm

RAC-50NXA1* 792mm 600mm 299mm

RAC-25NXA1
RAC-35NXA1
RAC-50NXA1

– 5 –

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Open the front panel

1. To open the front panel, use the remote controller to stop unit
operation. Then press at the top left and right corners of the front
panel.

2. Grasp the left and right sides of the front panel and open it toward
you.

Close the front panel

1. To close the front panel, press the upper center part of the front
panel.

2. Press at the top left and right corners of the front panel.

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 start 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.)

TEMPORARY SWITCH

Top left and right corners

TEMPORARY SWITCH

TEMPORARY SWITCH

If the remote controller does not work due to
battery failure, press this switch to start and stop
operation.

• This temporary operation will be at the most
recent setting made. (The unit will immediately
go into automatic operation once power is
switched on.)

Upper center part

INDOOR UNIT INDICATORS

HOW TO OPEN OR CLOSE THE FRONT PANEL

FILTER lamp

This lamp lights when the
device is operated for a total
of about 200 hours, it is time
to clean the filter. The lamp
goes out when the “

(AUTO
SWING)” button is pressed
while the operation is stopped.

– 6 –

SILENT
LOW
MED
HI

AUTO

HEAT

DEHUMIDIFY

COOL

FAN

FAN SPEED

SLEEPING

STOP (CANCEL)

START (RESERVE)

START/STOP

TIME

TIMER SET

TIMER SELECTOR

ON TIMER
OFF TIMER

AUTO SWING

NAMES AND FUNCTIONS OF EACH PART

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, in some cases, the control signal may not be received.
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.

Precautions for Use

• Do not put the remote controller in the following places.

• In 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.

●

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.

●

AUTO SWING button

Controls the angle of the horizontal air deflector.

●

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) to

(SILENT). (This button allows selecting the optimal or preferred fan speed

for each operation mode.)

●

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.

●

RESET button

Press this button after the batteries are replaced or when some irregular operation
is found.

●

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

●

AUTO SWING button

●

TIMER control

Use these buttons 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.

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VARIOUS FUNCTIONS

■ Auto Restart Control

AUTOMATIC OPERATION

The device will automatically determine the mode of operation, HEAT, COOL, or DEHUMIDIFY, depending
on the initial 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.

Press the (FAN SPEED) button. AUTO, LOW and SILENT are available.

Press the (START/STOP) button.
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.

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.

1

START

STOP

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 or COOL depending on
the current room temperature.

• When AUTO is first selected, the device will determine the current
room temperature and select the proper operation mode
accordingly.

• When the air conditioner has adjusted the room's temperature to
the near preset temperature, it will begin to monitor operation. If
the room temperature subsequently changes, the air conditioner
will once again select the appropriate operation (heating or cooling)
to adjust the temperature to the preset temperature. The monitoring
operation range is + 3°C relative to the preset temperature.

• If the mode automatically selected by the unit is not satisfactory,
manually change the mode setting (heat, dehumidify, cool or fan).

• 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.

2. Auto Restart Control is not available when Timer or Sleep Timer mode is set.

– 8 –

Set the desired FAN SPEED with the (FAN SPEED) button (the
display indicates the setting).

(AUTO) : The fan speed changes automatically according

to the temperature of the air which blows out.

(HI) : Economical as the room will become warm

quickly.
But you may feel a chill at the beginning.

(MED) : Quiet.

(LOW) : More quiet.

(SILENT) : Silent.

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).

■ As the settings are stored in memory in the remote controller, you only have
to press the (START/STOP) button next time.

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.

1

3

2

START

STOP

■ Defrosting

Defrosting will be performed about once an hour when frost forms on the heat exchange of the outdoor unit,
for 5~10 minutes each time.

During defrosting operation, the operation lamp blinks in cycle of 3 seconds on and 0.5 second off.

The maximum time for defrosting is 20 minutes.

However, if it is connected to multi type outdoor unit, the maximum time for defrosting is 15 minutes.
(If the piping length used is longer than usual, frost will likely to form.)

– 9 –

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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.

■ When you want to change the operation mode, please use the FUNCTION
selector.

■ Set the desired temperature is available.

■ You also can use the FUNCTION selector to select this operation.

Press the FUNCTION selector so that the display indicates

(DEHUMIDIFY).

Press the (FAN SPEED) button to select LOW and SILENT.

Press the (START/STOP) button.

1

• Dehumidifying takes place with a target temperature which is slightly lower than the room temperature
setting. (However, target temperature is 16°C for a temperature setting of 16°C.)
If the room temperature becomes lower than the target value, operation stops. If the room temperature
becomes higher than the target value, operation restarts.

• The preset room temperature may not be reached depending on the number of people present in the room
conditions.

■

Dehumidifying Function

START

STOP

– 10 –

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

automatically when the preset temperature has
been reached.

(HI) : Economical as the room will become cool quickly.

(MED) : Quiet.

(LOW) : More quiet.

(SILENT) : Silent.

Press the FUNCTION selector so that the display indicates

(COOL).

■ As the settings are stored in memory in the remote controller, you only have
to press the (START/STOP) button next time.

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. 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.

COOLING OPERATION

Use the device for cooling when the outdoor temperature is –10 to 42°C.
If humidity is very high (over 80%) indoors, some dew may form on the air outlet grille of the indoor unit.

1

2

3

START

STOP

– 11 –

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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.

FAN SPEED (AUTO) … When the AUTO fan speed mode is set in the cooling/heating operation:

For the cooling operation

For the heating operation

• The fan speed will automatically change according to the temperature of
discharged air.

• As room temperature reaches the preset temperature, a very light breeze
will blow.

• Operation starts in the “HI” mode to reach the preset temperature.

• As room temperature approaches the preset temperature, fan speed
automatically switches to “LOW”.

Press the (START/STOP) button. Fan operation starts with a beep.
Press the button again to stop operation.

Press the (FAN SPEED) button.

(HI) : The strongest air blow.

(MED) : Quiet.

(LOW) : More quiet.

(SILENT) : Silent.

Press the FUNCTION selector so that the display indicates (FAN).

1

2

START

STOP

– 12 –

Stop

Start

HOW TO SET THE TIMER

TIME
(current time)

OFF TIMER
ON TIMER

RESERVE

CANCEL

1

Set the (TIME) button.

1

Press the (OFF-TIMER)

button. The (OFF) mark blinks on
the display.

After you change the
batteries;

You can set the device to turn off at
the present time.

1

Press the (ON-TIMER) button.

The (ON) mark blinks on the
display.

The device will turn on at the
designated times.

1

Press the

(OFF-TIMER) button
so that the (OFF)

mark blinks.

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.

• 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.

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.

NOTE

You can set only one of the OFF-timer,
ON-timer and ON/OFF-timer.

Start

Stop

AM
PM

AM

AM

PM

PM

AM

PM

StopStart

ON-Timer

OFF-Timer

Time

ON/OFF-Timer

– 13 –

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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 automatically turn on earlier so that
the preset temperature can be reached at 7:00a.m.
The setting of the turn-on time is now complete.

4

Set the turn-on time with the

TIMER control button.

Example:
The device will turn off at 10:30p.m. and then
automatically turn on earlier so that the preset
temperature can be reached at 7:00a.m.
The settings of the turn-on/off times are now
complete.

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.

• 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 is order to use the same settings next time.

Example: The current time is 1:30p.m.

• The time indication will disappear automatically in 10
seconds.

• To check the current time setting, press the (TIME)
button twice.
The setting of the current time is now complete.

3

Press the (TIME) button
again. The time indication starts
lighting instead of flashing.

2

Set the turn-off time with the

TIMER control button.

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 (RESERVED)
sign lights. A beep occurs and the (TIMER) lamp lights on the indoor unit.

Example: The device will turn off at 11:00p.m.
The setting of turn-off time is now complete.

PM

PM

PM

PM

AM

AM

PM

AM

PM

AM

2

Set the current time with

the TIMER control button.

– 14 –

HOW TO SET THE SLEEP 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.

SLEEP

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.

Mode Indication

Sleep Timer

Sleep Timer: The device will continue working for the desired 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..

Start

Sleep

timer

The device will be turned off by the sleep timer
and turned on by on-timer.

1

Set the ON-timer.

2

Press the (SLEEP) button and set the sleep timer.

For heating:
In this case, the device will turn off in 2
hours (at 1:38 a.m.) and will turn on
early so that the present temperature
will be almost reached at 6:00 a.m. next
morning.

1 hour 2 hours 3 hours 7 hours

Sleep timer off

AM

AM

AM

NOTE

If you set the sleep timer when the off-time or on/off
timer has been set earlier, the sleep timer becomes
effective instead of the off - or on/off-timer set earlier.

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Vertical air deflector

ADJUSTING THE AIR DEFLECTORS

Adjustment of the conditioned air in the upward
and downward directions.
The horizontal air deflector is automatically set to
the proper angle suitable for each operation. The
deflector can be swung up and down continuously

and also set to the desired angle using the “
(AUTO SWING)” button.

1

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 be condensed on the air deflector and drips down occasionally. This
will wet your furniture.

Vertical

When
heating,
about 50°

When cooling,

dehumidifying

about 40°

about

30°

Adjustment of the conditioned air to the left and
right.

Hold the vertical air deflector as shown in the figure
and adjust the conditioned air to the left and right.

2

• 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 in the right
figure.

• When the “ (AUTO SWING)” button is
pressed while the operation is stopped,
the horizontal air deflector moves and
stops at the position where the air outlet
closes.

• When the auto swing operation is
performed, if the horizontal air deflector
is moved manually, the swinging range
may drift. However, it will return to the
original operation range after a short
time.

– 16 –

HOW TO CHANGE THE BATTERIES IN THE REMOTE CONTROLLER

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.

CAUTION

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.

TEMPORARY SWITCH

If the remote controller does not work due to battery
failure, press this switch to start and stop operation.

• This temporary operation will be at the setting made

most recently. (The unit will immediately go into
automatic operation once power is switched on.)

TEMPORARY SWITCH

CAUTION

1. Do not mix new and old batteries, or different type of
batteries together.

2. Remove the batteries when you do not use the remote
controller for 2 or 3 months.

Install the new batteries.
The direction of the batteries should match the marks in
the case.

Remove the cover as shown in the figure and remove the
old batteries.

2

1

Push and pull to
the direction of
arrow mark ▼.

Cover

– 17 –

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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.

PROCEDURE

MAINTENANCE

Open the front panel.

• To open the front panel, use the remote controller to stop unit
operation. Then press at the top left and right corners of the front
panel.

• Grasp the left and right sides of the front panel and open it toward you.

1

WARNING

• Before cleaning, stop unit operation with the remote controller and turn off the circuit breaker.

Remove the filters.

2

Remove dust of the filters using a vacuum cleaner.

• After using neutral detergent, wash with clean water and dry in
shade.

3

Attach the filters.

4

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. And also use a soft sponge to wash. Using a scrubber or brush cause the metal film
on the surface to come off.

• Don’t operate the unit without filter. Fault may occur if you continue.

Close the front panel.

1. To close the front panel, press the upper center part of the front
panel.

2. Press at the top left and right corners of the front panel.

5

CAUTION

•

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.

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Removing

1 Press at the top left and right corners of the front

panel.

2. HOW TO INSTALL AND REMOVE THE FRONT PANEL

• Be sure to use both hands to grasp the front panel when removing it or attaching it.

4. MAINTENANCE AT BEGINNING OF LONG OFF PERIOD

• Activating air conditioner drying will keep the interior of the indoor unit
dry and prevent mold formation.

• Turn off the circuit breaker.

2 Grasp the left and right sides of the front panel

and pull it up to remove.

1 Attach three front panel bearings to the axis of

the front cover. (Set the hook to face up.)

2 Close the front panel.

3. CLEANING OF FRONT PANEL

The front panel can be washed in water. It can be kept clean at all times.

• Front panel can be removed and washed in water. Gently clean the
front panel using a soft sponge.

• When the air conditioner is to be cleaned without removing the front
panel, clean both the body and remote controller with a dry soft cloth.

• Wipe off water completely. If water remains on the display section or
light receiver section, this could cause a malfunction.

CAUTION

• Do not splash or direct water to the body of the unit when cleaning it as this may
cause short circuit.

• 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.

Air blow

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Attaching

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ENGLISH

DEUTSCHFRANÇAISITALIANOSPANISHPORTUGUÊS∂ППЛУИО¿РУССКИЙ

5. AIR CLEANSING FILTERS (SPX-CFH15)

• When installing the air cleansing filters, remove the air filters and attach
them onto the hooks of the front cover frame.

• The cooling capacity is slightly weakened and the cooling speed becomes
slower when the air cleansing filters are used. So, set the fan speed to
“HIGH” when using it in this condition.

• The air cleansing filters can be used for 2 years.

Air cleansing filters

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Heating Capability

• This room air conditioner utilizes a heat pump system that absorbs
exterior heat and brings it into a room to be heated. As the ambient
temperature gets lower, heating capability will also lower. In such a
situation, the PAM and inverter work to increase compressor rpm to keep
the unit’s heating capability from decreasing. If the unit’s heating
performance is still unsatisfactory, other heating appliances should be
used to augment this unit’s performance.

• The air conditioner is designed to heat an entire room so that it may take some time before you feel warm. Timer
operation is recommended for effective preheating ahead of the desired time.

Cooling and Dehumidifying Capabilities

• If the heat present in a room exceeds the unit’s cooling capacity (for example, if there are many people in the room
or other heating appliances are used), the preset room temperature may not be reached.

INFORMATION

CAPABILITIES

CAUTION

Do not use a stove
or any other high­temperature devices
in proximity to the
indoor unit.

• When fan speed, room temperature are set with the remote controller before starting manual operation and
the buttons are released, the indication of settings will go off in 10 seconds and only the operation mode will
be displayed.

• Pressing the button while the unit is in operation will let the protective circuit work so that the unit will
not operate for approximately 3 minutes.

• During heating operation, the indoor unit’s color indicator lamp may flash with no air emitted for a while.

• If you feel cold wind during warming operation with the (HI) fan speed or want to make the unit operation
quieter after the room is heated, use of (AUTO) setting is recommended.

• With the (SILENT) setting, the unit’s cooling capability will lower slightly.

VARIOUS FUNCTIONS

• When the timer has been programmed, the unit will not operate even if the set time is reached unless the unit
receives a signal from the remote controller. Confirm that timer programming is complete (beep) and the
TIMER lamp of the indoor unit lights.

• If the (SLEEP) button is pressed while the ON/OFF timer is programmed, the sleep timer takes priority.

• During sleep timer operation, the fan speed sets to (SILENT) regardless of the preset speed. The remote

controller display indication will remain unchanged even with the (SILENT) setting.

TIMER PROGRAMMING/SLEEP TIMER OPERATION

PROHIBITION

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DEUTSCHFRANÇAISITALIANOSPANISHPORTUGUÊS∂ППЛУИО¿РУССКИЙ

REGULAR INSPECTION

PLEASE CHECK THE FOLLOWING POINTS EVERY EITHER HALF YEARLY OR YEARLY. CONTACT YOUR
SALES AGENT SHOULD YOU NEED ANY HELP.

1

2

Check to see if the unit’s earth line has been connected
correctly.

If the earth line is disconnected or faulty, unit failure or electric
shock hazard may result.

Check to see if the mounting frame has rusted excessively
or if the outdoor unit has tilted or become unstable.

It could collapse or fall, causing injury.

WHEN ASKING FOR SERVICE, CHECK THE FOLLOWING

CONDITION CHECK THE FOLLOWING POINTS

• Do the batteries need replacement?

• Is the polarity of the inserted batteries correct?

• Is the air filter blocked with dust?

• Is the set temperature suitable?

• Have the top and bottom air deflectors been adjusted to their correct
positions according to the operation mode selected?

• Are the air inlets or air outlets of indoor and outdoor units blocked?

• Is the fan speed “LOW” or “SILENT”?

WARNING

WARNING

AFTER SALES SERVICE AND WARRANTY

• Is the fuse all right?

• Is the voltage extremely high or low?

• Is the circuit breaker “ON”?

• Is the setting of operation mode different from other indoor units?

When it does not operate.

When it does not cool well.
When it does not heat well.

■ The following phenomena do not indicate unit failure.

<Operation start>
The unit is preparing to blow warm air. Please wait.

<In operation>
The outdoor unit is defrosting. Please wait.

Hissing or fizzy sounds

Refrigerant flow noise in the pipe or valve sound generated when flow rate is
adjusted.

Squeaking noise

Noise generated when the unit expands or contracts due to temperature
changes.

Rustling noise

Noise generated with the indoor unit fan’s rpm changing such as operation start
times.

Clicking noise Noise of the motorized valve when the unit is switched on.

Perking noise

Noise of the ventilation fan sucking in air present in the drain hose and blowing out
dehumidifying water that had accumulated in the condensed water collector. For
details, consult your sales agent.

Changing operation noise

Operation noise changes due to power variations according to room temperature
changes.

Mist emission Mist is generated as the air within the room is suddenly cooled by conditioned air.

During heating, the operation indicator
blinks and air blow stops

If the remote controller is not
transmitting a signal.

(Remote controller display is
dim or blank.)

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Steam emitted from the outdoor unit Water generated during defrosting operation evaporates and steam is emitted.

Odors

Caused as the smells and particles of smoke, food, cosmetics, etc. present in room
air become attached the unit and blown off into the room again.

Defrosting is underway (as the heating operation is stopped, the microcomputer
checks frost accumulated in the indoor unit and instructs the unit to perform
automatic defrosting if necessary).

Shows preheating or defrosting operation is underway.
As the protective circuit or preheat sensor operates when unit operation is stopped
during preheating and then restarted, or when operation mode is switched from
cooling to heating, the lamp continues to blink.

Actual room temperature may deviate slightly from the remote controller’s
temperature setting depending on the number of people in the room, indoor or
outdoor conditions when the air conditioner is used for more than one room at the
same time.

• If the unit still fails to operate
normally after performing the
above inspections, turn the
circuit breaker off and contact
your sales agent immediately.

Contact your sales agent immediately if the
following phenomena should occur:

• The circuit breaker switches off or the fuse blows
frequently.

• The switch operation is not stable.

• Foreign matter or water accidentally enters the unit interior.

• The power cord gets excessively hot or its insulation is torn or
stripped.

• TIMER lamp on the indoor unit display blinks.
As the nature of the failure can be identified by the blinking cycle,
check the blinking cycle before turning off the circuit breaker.

• Please contact your sales agent immediately if the air conditioner still fails to operate normally after the above
inspections. Inform your agent of the model of your unit, production number, date of installation. Please also
inform him regarding the fault.

Please note:
On switching on the equipment, particularly when the room light is dimmed, a slight brightness fluctuation
may occur. This is of no consequence.
The conditions of the local Power Supply Companies are to be observed.

Notes

• In quiet operation or stopping the running, the following phenomena may
occasionally occur, but they are not abnormal for the operation.
(1) Slight flowing noise of refrigerant in the refrigerating cycle.
(2) Slight rubbing noise from the fan casing which is cooled and then gradually

warmed as operation stops.

• The odor will possibly be emitted from the room air conditioner because the
various odor, emitted by smoke, foodstuffs, cosmetics and so on, sticks to it. So
please clean the air filter and the evaporator regularly to reduce the odor.

The outdoor unit continues to operate
even if operation is stopped

Does not reach the temperature
setting

The OPERATION lamp is blinking

( )

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MEMO

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