Hitachi RAS-72CHA3 User manual

– 1 –
SPLIT TYPE
INDOOR UNIT/OUTDOOR UNIT
OUTDOOR UNIT
INDOOR UNIT
RAC-72CHA3
RAS-72CHA3
MODEL
RAS-72CHA3/RAC-72CHA3
Instruction manual Page 1~22
To obtain the best performance and ensure years of trouble free use, please read this instruction
manual completely.
RAS/RAC-72CHA3 EN1 17/2/05, 4:12 PM1

–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.
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●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.
●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.
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●This unit has UV LED which emits ultra violet light.
AVOID DIRECT EYE EXPOSURE.
RAS/RAC-72CHA3 EN1 17/2/05, 4:12 PM2

–3 –
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 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.
●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.
●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.
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●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 place plants directly under the air flow as it is bad for the plants.
●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.
RAS/RAC-72CHA3 EN1 17/2/05, 4:12 PM3

–4 –
INDOOR UNIT
OUTDOOR UNIT
WIDTH (mm)
1150
850
MODEL
RAS-72CHA3
RAC-72CHA3
HEIGHT (mm)
333
650
DEPTH (mm)
245
298
MODEL NAME AND DIMENSIONS
NAMES AND FUNCTIONS OF EACH PART
AIR FILTER
To prevent dust from coming into the
indoor unit.
(Refer page 21)
FRONT PANEL (AIR INLET).
INDOOR UNIT INDICATORS
Light indicator showing the operating
condition.
(Refer page 5)
HORIZONTAL DEFLECTOR ●
VERTICAL DEFLECTOR (AIR
OUTLET)
(Refer page 16)
REMOTE CONTROLLER
Send out operation signal to the indoor
unit. So as to operate the whole unit.
(Refer page 6)
●
Drain pipe
Condensed water drain to outside.
Connecting cord and insulation pipe for piping
Air inlet (Back and Left side)
Air outlet
RAS/RAC-72CHA3 EN1 17/2/05, 4:12 PM4

–5 –
Press
Temporary Switch
Non-conductor Stick
INDOOR UNIT INDICATORS
TEMPORARY SWITCH
Use this switch to start and stop when the remote
controller does not work. [Use non-conductor stick
(example toothpick)]
●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 turn on again,
the operation is done in automatic mode.
OPERATION INDICATOR
TIMER LAMP
This lamp lights when the timer is working.
OPERATION LAMP
This lamp lights during operation.
FILTER LAMP
When the device is operated for a total of about 200
hours, the FILTER lamp lights to indicate that it is time
to clean the filter. The lamp goes out when the
“(AUTO SWING)”button is pressed while the
device is on “STANDBY MODE”.
RAS/RAC-72CHA3 EN1 17/2/05, 4:12 PM5

– 6 –
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.
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.
●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.
●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)
(during the (FAN) mode, from HI to MED to LOW).
●AUTO SWING button
Controls the angle of the horizontal air deflector.
●TEMPERATURE buttons
Use these buttons to raise or lower the temperature setting. (Keep pressed,
and the value will change more quickly.)
●SLEEP button
Use this button to set the sleep timer.
●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.
●PARALLEL SWING button
Controls the angle of the vertical air deflectors to parallel.
●SYMMETRY SWING button
Controls the angle of the vertical air deflectors to symmetry.
●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.
●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.
RAS/RAC-72CHA3 EN2 17/2/05, 4:13 PM6

– 7 –
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 not change when the room temperature
varies.
■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.
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
RESET
Over 27°C COOL
23~27°C
Under 23°C HEAT
Temperature settingFunction
27°C
23°C
Slightly lower than the
room temperature LOW
FAN SPEED
HI at start, MED or LOW
after the preset temperature
is reached
HI at start, MED or LOW
after the preset temperature
is reached
--
DEHUMIDIFY
-
Initial room temperature
(approx.)
■Condition of Automatic Operation
RAS/RAC-72CHA3 EN2 17/2/05, 4:13 PM7

– 8 –
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.
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
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) : Quiet.
(LOW) : More quiet.
Set the desired room temperature with the TEMPERATURE
buttons (the display indicates the setting).
The range of 18-22°C is recommended as the
room temperature for heating.
If the temperature setting is 20°C, the room
temperature will be controlled at around 20°C.
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.
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START
STOP
RAS/RAC-72CHA3 EN2 17/2/05, 4:13 PM8

– 9 –
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.
°C
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
RAS/RAC-72CHA3 EN2 17/2/05, 4:13 PM9

– 10 –
COOLING OPERATION
Use the device for cooling when the outdoor temperature is 22-42°C.
If humidity is very high (over 80°C) indoors, 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 automatically when the preset temperature
has been reached.
(HI) : Economical as the room will become cool
quickly.
(MED) : Quiet.
(LOW) : More quiet.
Set the desired room temperature with the TEMPERATURE
button (the display indicates the setting).
The range of 25-28°C is recommended as the
room temperature for cooling.
If the temperature setting is 27°C, the room
temperature will be controlled at around 27°C.
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.
■As the settings are stored in memory in the remote controller, you
only have to press the (START/STOP) button next time.
However, if operation stops with fan speed of “LOW”, fan speed is
automatically set to “AUTO” next time.
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2
START
STOP
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