Hitachi RAS-25YHA5, RAS-35YHA6, RAC-35YHA6, RAC-25YHA5 Instruction Manual
SPLIT TYPE AIR CONDITIONER
INDOOR UNIT/OUTDOOR UNIT
MODEL
RAS-25YHA5/RAC-25YHA5
RAS-35YHA6 /RAC-35YHA6
INDOOR UNIT
OUTDOOR UNIT
ENGLISH
RAS-25YHA5
RAS-35YHA6
RAC-25YHA5
RAC-35YHA6
Instruction manual Page 1~20
To obtain the best performance and ensure years of trouble free use, please read this instruction manual completely.
– 1 –
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 “
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.)
This sign in the figure indicates prohibition. Indicates the instructions that must be followed.
•
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.
• Please keep this manual after reading.
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.
WARNING
CAUTION
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.
Warning ” and “ Caution ”. The “Warning” section contains
PROHIBITION
CONNECT EARTH LINE
PROHIBITION
PROHIBITION
WARNING
PRECAUTIONS DURING SHIFTING OR MAINTENANCE
• 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.
• 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 will cause an electrical shock, heat generation or fire.
• Do not bundle the power cable, pull it, put something 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.
• Do not put objects like thin rods into the panel of blower and suction side
PROHIBITION
because the high-speed fan inside may cause danger.
– 2 –
“OFF”
PROHIBITION
PROHIBITION
PROHIBITION
PRECAUTIONS DURING OPERATION
• Do not use any conductor as fuse wire, this could cause fatal accident.
HSILGNE
PROHIBITION
WARNING
“OFF”
• 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.
• The product shall be operated under the manufacturer specification and not for
any other intended use.
• Do not attempt to operate the unit with wet hands, this could cause fatal accident.
• During thunder storm, disconnect the plug top or turn off the circuit breaker.
DON’T WET
• When operating the unit with burning equipments, regularly ventilate
the room to avoid oxygen insufficiency.
STRICTLY OBSERVE
PRECAUTIONS
• Do not direct the cool air coming out from the air-conditioner panel to
PROHIBITION
face household heating apparatus as this may affect the working of
apparatus such as the electric kettle, oven etc.
• 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.
PROHIBITION
Electrical leakage could be present and cause electric shock.
• Do not place plants or animals directly under the air flow as it is bad for the plants or
animals.
PROHIBITION
PROHIBITION
PROHIBITION
PROHIBITION
CAUTION
• Do not climb on the outdoor unit or put objects on it.
PROHIBITION
• 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
PROHIBITION
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
PROHIBITION
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.
PROHIBITION
• Do not touch the air outlet, bottom surface and aluminum fin of the outdoor
unit.
DON’T TOUCH
You may get hurt.
• Do not touch the refrigerant pipe and connecting valve.
Burns may result.
DON’T TOUCH
• 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.
– 3 –
NAMES AND FUNCTIONS OF EACH PART
INDOOR UNIT
Air filter
To prevent dust from coming into the indoor unit.
(Refer page 16)
Front panel
(Refer page 17)
Indoor unit indicators
Light indicator showing the operating condition.
(Refer page 5)
Vertical deflector
(Refer page 15)
Horizontal deflector
(Air Outlet)
(Refer page 15)
Remote controller
Send out operation signal to the indoor unit. So as
to operate the whole unit.
(Refer page 6)
OUTDOOR UNIT
Air outlet
Wh e n “heat i ng” operat i on is
performed, cool air blows and
when “cooling” or “dehumidifying”
operation is performed, warm air
blows.
Drain port
(Bottom)
(Lower section of the side)
Earth terminal
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)
MODEL NAME AND DIMENSIONS
MODEL WIDTH (mm) HEIGHT (mm) DEPTH (mm)
RAS-25YHA5\RAS-35YHA6
5 6
About the outdoor unit:
• When “Stop” is selected during operation
of the indoor unit, the fan of the outdoor
unit conti nues 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.
780 280 218
750 548 288RAC-25YHA \RAC-35YHA
– 4 –
HSILGNE
NAMES AND FUNCTIONS OF EACH PART
INDOOR UNIT INDICATIONS
TIMER LAMP (Orange)
This lamp lights when the
timer is working.
ENGLISH
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
Nano Titanium Air Cleaning Mesh
Mesh (Accessories) to the filter frame.
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
Nano Titanium Air Cleaning Mesh
Nano Titanium Air Cleaning Mesh
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.
Nano Titanium Air Cleaning Mesh
are used.
are washable
Air Filter
C-case
Claw
Filter Frame
– 5 –
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.
Signal Transmission
Transmission Sign
The transmission sign blinks
when a signal has been send.
FUNCTION selector
Use this button to select the
operating mode. Every time
you press it, the mode will
change from
(COOL) to (HEAT)
(DEHUMIDIFY) and
cyclically.
(FAN)
(AUTO) to
to
to
(
Page 7)
ECO Button
Use this button to set the ECO
mode.
(
Page 1 3)
SLEEP button
Use this button to set the sleep
timer.
(
Page 1 )4
OFF TIMER Button
Select the turn OFF time.
( Page 1 2 )
POWERFUL Button
Press this button to start
powerful operation. ( Page 1 2 )
FAN SPEED Button
Select the fan speed for cooling
and heating mode.
( Page 1 1 )
START/STOP button
Press this button to start operation.
Press it again to stop operation.
AUTO SWING（Horizontal)
Button
Control the angle of the
horizontal air defl ector.
( Page 1 5 )
TEMPERATURE Button
Room temperature setting.
Value will change quicker when
keep pressing.
ON TIMER Button
Select the turn ON time.
( Page 1 2 )
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.
AUTO SWING（Vertical)
Button
Control the angle of the
vertical air defl ector.
(Page 1 5 )
– 6 –
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
●
●
ENGLISH
■
– 7 –
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
1
(HEAT).
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.
2
(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.
Set the desired room temperature with the TEMPERATURE
buttons (the display indicates the setting).
3
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 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.
The maximum time for defrosting is 20 minutes.
(If the piping length used is longer than usual, frost will likely to form.)
– 8 –
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