Hitachi RAS-25YHA5 User manual

– 1 –
ENGLISH
SPLIT TYPE AIR CONDITIONER
MODEL
RAS-25YHA5/RAC-25YHA5
INDOOR UNIT/OUTDOOR UNIT
INDOOR UNIT
Instruction manual Page 1~20
To obtain the best performance and ensure years of trouble free use, please read this instruction manual completely.
OUTDOOR UNIT
RAC-25YHA5
RAS-35YHA6 /RAC-35YHA6
RAC-35YHA6
RAS-25YHA5
RAS-35YHA6

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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.
This sign in the figure indicates prohibition. Indicates the instructions that must be followed.
WARNING
CAUTION
•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.
•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. If any failure
is found in the drain path, water drops from the indoor and outdoor units, causing
wet household effects.
•Make sure that a single phase 240V power source is used.
The use of other power sources may cause electrical components to overheat
and lead to fire.
PROHIBITION
CONNECT EARTH LINE
PROHIBITION
PROHIBITION
•Should abnormal situation arise (like burning smell), please stop operating the
unit and remove plug from the socket or 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.
WARNING
PRECAUTIONS DURING INSTALLATION
PRECAUTIONS DURING SHIFTING OR MAINTENANCE
“OFF”
PROHIBITION
•Avoid an extended period of direct air flow for your health.
•Do not connect the power calbe with an extension cable or do not plug too many
leads of the other electric appliance into the socket where this cable is plugged.
In addition, wire the cable with some allowances to prevent the cable from stretching.
Not doing so willcause an electrical shock, heat generation or fire.
PROHIBITION
•Do not put objects like thin rods into the panel of blower and suction side
because the high-speed fan inside may cause danger.
•Do not bundle the power cable, pull it, putsomething on it, heat it, process it, or
put it between things. Breakage of the power cable may result.
Use of a damaged cable may cause an electrical shock or a fire.
PROHIBITION
PROHIBITION
The appliance is not to be used 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.
Children being supervised not to play with the appliance.

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HSILGNE
WARNING
PRECAUTIONS DURING OPERATION
•Do not use any conductor as fuse wire, this could cause fatal accident.
PROHIBITION
•During thunder storm, disconnect the plug top or turn off the circuit breaker.
•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.
“OFF”
CAUTION
PROHIBITION
•The product shall be operated under the manufacturer specification and not for
any other intended use.
PROHIBITION
DON’T WET
•Do not attempt to operate the unit with wet hands, this could cause fatal accident.
STRICTLY OBSERVE
PRECAUTIONS
PROHIBITION
PROHIBITION
PROHIBITION
PROHIBITION
PROHIBITION
•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 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.
•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 place plants or animals directly under the air flow as it is bad for the plants or
animals.
•Do not climb on the outdoor unit or put objects on it.
PROHIBITION
PROHIBITION
PROHIBITION
DON’T TOUCH
DON’T TOUCH
•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 automati-
cally 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 especially 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.
•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.
If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or
similarly qualified persons in order to avoid a hazard.

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NAMES AND FUNCTIONS OF EACH PART
INDOOR UNIT
Remote controller
Send out operation signal to the indoor unit. So as
to operate the whole unit.
(Refer page 6)
MODEL NAME AND DIMENSIONS
About the outdoor unit:
•When “Stop” is selected during operation
of the indoor unit, the fan of the outdoor
unit continues turning for 10 to 60
seconds to cool the electric parts down.
•In heating operation, condensate or
water due to defrosting will flow.
Do not cover the drain port of the outdoor
unit because such water may freeze in
the chilly area.
•When the outdoor unit is hung on the
ceiling, install the bush and drain pipe
on the drain port and drain water.
MODEL WIDTH (mm) HEIGHT (mm) DEPTH (mm)
780 280 218
750 548 288RAC-25YHA \RAC-35YHA
Air outlet
When “heating” operation is
performed, cool air blows and
when “cooling” or “dehumidifying”
operation is performed, warm air
blows.
Drain hose
Drains the dehumidified water from the indoor unit to the
outdoor during “cooling” or “dehumidifying” operation.
Piping and Wiring
Air inlets (Rear and left sides)
Drain port
(Bottom) Earth terminal
(Lower section of the side)
OUTDOOR UNIT
RAS-25YHA5\RAS-35YHA6
Air filter
To prevent dust from coming into the indoor unit.
Front panel
Indoor unit indicators
Light indicator showing the operating condition.
(Refer page 5)
Horizontal deflector
(Air Outlet)
(Refer page 15)
(Refer page 16)
(Refer page 17)
5 6
Vertical deflector
(Refer page 15)

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ENGLISH
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HSILGNE
NAMES AND FUNCTIONS OF EACH PART
INDOOR UNIT INDICATIONS
TIMER LAMP (Orange)
This lamp lights when the
timer is working.
OPERATION LAMP (Yellow)
This lamp lights during operation.
The OPERATION LAMP flashes
in the following cases during
heating.
(1)During preheating
For about 2-3 minutes after
starting up.
(2)During defrosting
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.
TEMPORARY SWITCH
Use this switch to start and stop when the remote
controller does not work.
This temporary operation will be at the most recent
setting made. (The unit will immediately go into
automatic operation once power is switched on.)
CAUTION
Turn off the circuit breaker or pull out
the power plug if the unit is not be
operated for a long period.
If the power stays on and the unit is not operated, power is slightly consumed in the control circuit.
The power is saved by turning off the power switch (or the circuit breaker when the power is supplied
from the outdoor unit).
Attaching the Nano Titanium Air Cleaning
Attach the
to the C-case by gently compress its both sides
and release after insertion into filter frame.
The cooling capacity is slightly weakened and
the cooling speed becomes slower when the
are used.
and reusable up to 20 times by using vacuum
cleaner or water rinse under running tap water.
When you want to renew it, please ask your sales
agent. Optional air cleansing and deodorizing
filters.
Air Filter Claw
Filter Frame
Mesh (Accessories) to the filter frame.
Nano Titanium Air Cleaning Mesh
Nano Titanium Air Cleaning Mesh
Nano Titanium Air Cleaning Mesh are washable
Nano Titanium Air Cleaning Mesh
C-case

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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 Transmission
Use this button to select the
operating mode. Every time
you press it, the mode will
change from
Transmission Sign
The transmission sign blinks
when a signal has been send.
POWERFUL Button
Press this button to start
powerful operation. ( Page 1 2 )
TEMPERATURE Button
Room temperature setting.
Value will change quicker when
keep pressing.
FAN SPEED Button
Select the fan speed for cooling
and heating mode.
( Page 1 1 )
AUTO SWING（Horizontal)
Button
Control the angle of the
horizontal air deflector.
( Page 1 5 )
AUTO SWING（Vertical)
Button
Control the angle of the
vertical air deflector.
(Page 1 5 )
(AUTO) to
(COOL) to (HEAT)
(DEHUMIDIFY) and
FUNCTION selector
to
(FAN) cyclically.
to
SLEEP button
Use this button to set the sleep
timer.
ECO Button
Use this button to set the ECO
mode.
(Page 1 3)
OFF TIMER Button
Select the turn OFF time.
( Page 1 2 )
ON TIMER Button
Select the turn ON time.
( Page 1 2 )
START/STOP button
Press this button to start operation.
Press it again to stop operation.
(Page 7)
(Page 1 )4

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ENGLISH
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.
2. Auto Restart Control is not available when Timer or Sleep Timer mode is set.
AUTOMATIC OPERATION
■
●
●

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Press the (START/STOP) button. Heating operation starts
with a beep. Press the button again to stop operation.
START
STOP
HEATING OPERATION
•Use the device for heating when the outdoor temperature is under 27 °C.
When it is too warm (over 27 °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).
1
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.
2
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.
3
As the settings are stored in memory in the remote controller, you
only have to press the (START/STOP) button next time.
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.
(If the piping length used is longer than usual, frost will likely to form.)

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HSILGNE
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.
Press the (START/STOP) button.
START
STOP
Press the FUNCTION selector so that the display indicates
(DEHUMIDIFY).
Press the (FAN SPEED) button to select LOW and SILENT.
1
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.
Dehumidifying Function
•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.

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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.
START
STOP
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.
Press the FUNCTION selector so that the display indicates
(COOL).
1
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.
2
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.
3
As the settings are stored in memory in the remote controller, you
only have to press the (START/STOP) button next time.

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HSILGNE
Press the (START/STOP) button. Fan operation starts with a
beep.
Press the button again to stop operation.
START
STOP
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).
1
Press the (FAN SPEED) button.
(HI) : The strongest air blow.
(MED) : Quiet.
(LOW) : More quiet.
(SILENT) : Silent.
2
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.
•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 auto-
matically switches to “LOW”.
For the cooling operation

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Operation stop at setting time
Timer Reservation
OFF TIME setting
•Select the OFF TIME by pressing the (OFF)
Button.
•Setting time will change according to the below
sequence when you press the button.
1 hour interval
TIMER RESERVATION
ON Timer and OFF Timer are available.
POWERFUL OPERATION
• During POWERFUL operation, cooler or warmer air will be blown out from indoor unit for COOLING or
HEATING operation respectively.
Press the (POWERFUL) button during operation.
•" " is displayed on the LCD.
POWERFUL operation ends in 20 minutes. Then the system
automatically operates with the previous settings used before
POWERFUL operation.
START
Press the
Press the (START/ STOP) button. or
(POWERFUL) button again.
•" " disappears from the LCD.
CANCEL
NOTE
• When ECO mode is selected, POWERFUL operation is cancelled.
• During POWERFUL operation, capacity of the air conditioner will not increase
–if the air conditioner is already running at maximum capacity.
–just before defrost operation (when the air conditioner is running in HEATING operation).
• After auto restart, POWERFUL operation is cancelled and previous operation shall start.
2
1
ON TIME setting
• Select the ON TIME by pressing the (ON) Button.
• Setting time will change according to the below sequence
when you press the button.
Timer off
1 hour interval
Timer on
By pressing (POWERFUL) button during HEATING, DEHUMIDIFYING, COOLING F , A
•
•
operation, the air conditioner performs at maximum power.
, AN UTOMATIC

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HSILGNE
ECO OPERATION
Energy saving operation by changing set temperature and by limiting the maximum power consumption
value.
Press (ECO) button during operation.
•" " is displayed on the LCD.
• Energy saving operation will start by changing
the set temperature higher or lower and saving
operation power consumption.
START
Press (START/STOP) button.
• Press (ECO) button again.
•" " disappears from the LCD.
CANCEL
NOTE
• In case the power consumption is already low,ECO operation will not reduce the power
consumption.
• By pressing (POWERFUL) button, ECO operation is cancelled.
• After auto restart, ECO operation is cancelled and previous operation mode shall start.
By pressing the (ECO) button during Heating, Automatic
Dehumidifying or Cooling operation, the air conditioner
performs the “ECO” operation.

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HOW TO SET THE SLEEP TIMER
SLEEP
IndicationMode
Sleep Timer
1 hour 2 hours 3 hours 7 hours
Sleep timer off
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.
NOTE
If you set the sleep timer when the off-time or on-timer has been set earlier, the sleep timer
becomes effective instead of the off - or on/off-timer set earlier.
...
Press (START/STOP) button.
●Room air conditioner will switch off.
Press (SLEEP) button again until off time, “ ” and
controller display.
●A beep sound emitted from indoor unit and the (TIMER) lamp
on the indoor unit turns off.
●SLEEP TIMER operation is cancelled.
number of hour disappear from the remote
T??o cancel SLEEP TIMER operation.
By pressing (SLEEP) button during AUTO, HEATING, DEHUMIDIFYING, COOLING or FAN
operation, the unit shifts the room temperature and reduces the fan speed.

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ENGLISH
ADJUSTING THE AIR DEFLECTORS
1
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
(HORIZONTAL ) )” button.
•In “Cooling” operation, do not keep the horizontal air
deflector swinging for a long time. Some dew may form on
the horizontal air deflector and dew may drop.
CAUTION
2
Adjustment of the conditioned air to the left and right.
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
about 15°
about 60°
about 45
°
about 30°
When cooling,
dehumidifying
When heating
• If the “ (AUTO SWING(HORIZONTAL ))” 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. Several seconds
(about 6 seconds) may be required before the deflector starts to move.
•Use the horizontal air deflector within the adjusting range
shown in the right.
•When the operation is stopped, the horizontal air deflector
moves and stops at the position where the air outlet closes.
• If the “ (AUTO SWING(VERTICAL ))” button is pressed once,
the deflectors will start to swing right and left. If the button is pressed
again, the deflector will stop in the current position. Several seconds
(about 6 seconds) may be required before the deflector starts to move.
Push and pull to the
dirction of arrow
Horizontal
Horizontal

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MAINTENANCE
Cleaning and maintenance must be carried out only by qualified service personal. Before cleaning,
stop operation and switch off the power supply.
CAUTION
1. AIR FILTER
PROCEDURE
1
Open the front panel carefully and remove the filter.
2
Vacuum dust from the air filter using vacuum cleaner.
If there is too much dust, wash the filter with a detergent
and rinse it thoroughly. After that, dry it in the shade.
3
•Set the filter with “FRONT” mark facing front, and
slot them into the original state.
•After attaching the filters, push the front panel at
three arrow portions as shown in figure and close
it.
•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.
•Don't operate the unit without filter. Fault may occur if you continue.
CAUTION
TEMPORARY
SWITCH
TEMPORARY
SWITCH
TEMPORARY
SWITCH
Please clean the filter once about every two weeks. By doing so, the power rates are saved. In
case the air filter is full of dust, the air flow will decrease and the cooling capacity will be reduced.
Further, noise may occur. Be sure to clean the filter following the procedure below.

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HSILGNE
2. CLEANING OF FRONT PANEL
•Remove the front panel and wash with clean water.
Wash it with a soft sponge.
After using neutral detergent, wash thoroughly with
clean water.
•When front panel is not removed, wipe it with a soft
dry cloth. Wipe the remote controller thoroughly with
a soft dry cloth.
•Wipe the water thoroughly.
If water remains at indicators or signal receiver of
indoor unit, it causes trouble.
Method of removing the front panel.
Be sure to hold the front panel with both hands to
detach and attach it.
CAUTION
Removing the Front Panel Attaching the Front Panel
•When the front panel is fully opened with both
hands, push the right arm to the inside to
release it, and while closing the front panel
slightly, put it out forward.
•Move the shafts of the left and right arms into
the steps in the unit and securely insert them
into the holes.
•Do not splash or direct water to the body of the unit when cleaning it as
this may cause short circuit.
•Never use hot water (above 40°C), benzine, gasoline, acid, thinner or a
brush, because they will damage the plastic surface and the coating.
3. MAINTENANCE AT BEGINNING OF LONG OFF PERIOD
•Run the unit by 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.
•Switch off the power plug or turn off the circuit breaker.
B
E
N
Z
I
N
E
T
H
I
N
N
E
R
A
C
I
D
Air
Blow
Shaft
Hole
2 1
Shaft
Hole
2 1

– 18 –
INFORMATION
CAPABILITIES
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 inverter work to increase compressor rpm to keep the
unit’s heating capability from decreasing. If the unit’s heating perfor-
mance 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.
CAUTION
Do not use a stove
or any other
hightemperat ure
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 heating 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 (LOW), (SILENT) settings, the unit’s cooling capacity will lower slightly.
•With the (LOW), (SILENT) settings, the unit’s fan speed of heating operation will vary with the
operating conditions.
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 timer or OFF timer is programmed, the sleep timer takes
•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
priority.

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HSILGNE
REGULAR INSPECTION
PLEASE CHECK THE FOLLOWING POINTS EVERY EITHER HALF YEARLY OR YEARLY. CONTACT
YOUR SALES AGENT SHOULD YOU NEED ANY HELP.
1
2
3
WARNING
WARNING
Check to see if the unit ’s earth line has been con-
nected 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 ex-
cessively or if the outdoor unit has tilted or become
unstable.
It could collapse or fall, causing injury.
AFTER SALES SERVICE AND WARRANTY
WHEN ASKING FOR SERVICE, CHECK THE FOLLOWING POINTS.
CONDITION CHECK THE FOLLOWING POINTS
•Do the batteries need replacement?
•Is the polarity of the inserted batteries correct?
•Is the fuse all right?
•Is the voltage extremely high or low?
•Is the circuit breaker “ON”?
•Is the power plug inserted?
•Do you have any power cut?
•Is the air filter blocked with dust?
•Is the set temperature suitable?
•Have horizontal 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”?
When it does not operate.
When it does not cool well.
When it does not heat well.
If the remote controller is not
transmitting a signal.
(Remote controller display is
dim or blank.)
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.
Refrigerant flow noise in the pipe or valve sound generated when flow rate is
adjusted.
Noise generated when the unit expands or contracts due to temperature changes.
Noise generated with the indoor unit fan’s rpm changing such as operation start
times.
Noise of the motorized valve when the unit is switched on.
During heating, the operation
indicator blinks and air blow stops
Hissing or fizzy sounds
Squeaking noise
Rustling noise
WARNING
Clicking noise
Check to see if the power plug is securely inserted
into the wall socket.
If the power plug is not inserted into the wall socket
securely or becomes hot, an electric shock or fire may result.
If dust or dirt is found on the power plug, clean the plug
and insert it into the wall socket.

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•If the unit still fails to operate
normally after performing the
above inspections, turn the
circuit breaker off, or pull the
power plug out, 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.
( )
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.
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.
Operation noise changes due to power variations according to room temperature
changes.
Mist is generated as the air within the room is suddenly cooled by conditioned air.
Water generated during defrosting operation evaporates and steam is emitted.
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 outdoor 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.
•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.
Does not reach the temperature
setting
Mist emission
Perking noise
Changing operation noise
Steam emitted from the outdoor unit
The outdoor unit continues to operate
even if operation is stopped.
Odors
The OPERATION lamp is blinking.