Hitachi RAS-S24HPA, RAC-S24HPA Instruction Manual

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ENGLISH

INDOOR UNIT/OUTDOOR UNIT

MODEL

RAS-S24HPA(EG)/RAC-S24HPA(EG)

OUTDOOR UNIT INDOOR UNIT

Instruction manual Page 1~24
To obtain the best performance and ensure years of
trouble free use, please read this instruction manual
completely.

SPLIT TYPE AIR CONDITIONER

RAS-S24HPA(EG)

RAC-S24HPA(EG)

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!

SAFETY PRECAUTION

WARNING

PRECAUTIONS DURING INSTALLATION

●

Do not reconstruct the unit.

Water leakage, fault, short circuit or fi re may occur if you reconstruct

the unit by yourself.

●

Please ask your sales agent or qualifi ed technician for the installation

of your unit. Water leakage, short circuit or fi re 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 the unit near a location where there is fl ammable gas.

The outdoor unit may catch fi re if fl ammable gas leaks around it.

●

Please ensure smooth fl ow of water when installing the drain hose.

CAUTION

!

!

PRECAUTIONS DURING OPERATION

●

Avoid an extended period of direct air fl ow for your health.

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Do not insert a fi nger, 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 fi gure indicates prohibition.

PRECAUTIONS DURING SHIFTING OR MAINTENANCE

●

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 fi re 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 fi re.

●

Please contact your agent if you need to remove and reinstall the unit. Electric

shock or fi re may occur if you remove and reinstall the unit yourself improperly.

●

If the supply cord is damaged, it must be replaced by the special cord

obtainable at authorized service/parts centers.

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●

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.

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ENGLISH

PRECAUTIONS DURING OPERATION

●

Do not attempt to operate the unit with wet hands, this could cause fatal

accident.

●

When operating the unit with burning equipments, regularly ventilate the

room to avoid oxygen insuffi ciency.

●

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 fi n and blocked the evaporation water fl ow
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, fi rm 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 defl ector facing down or moving automatically for a long period of time,
water will condense on the air defl ector and drips down occasionally. This will wet your furniture.
Therefore, do not operate under such condition for a long time.

●

If the amount of heat in the room is above the cooling or heating capability of the unit (for

example: more people entering the room, using heating equipments and etc.), the preset room
temperature cannot be achieved.

●

This appliance is not intended for use by young children or infi rm persons unless they have

been adequately supervised by a responsible person to ensure that they can use the appliance
safely.

●

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

●

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

●

Please switch off the unit and turn off the circuit breaker during cleaning,

the high-speed fan inside the unit may cause danger.

●

Turn off the circuit breaker if the unit is not to be operated for a long period.

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The product shall be operated under the manufacturer specifi cation 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 fl ow as it is bad for the plants.

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INDOOR UNIT

NAMES AND FUNCTIONS OF EACH PART

Air fi lter

To prevent dust from coming into the indoor unit.
(Refer page 18)

Front panel

Indoor unit indicators

Light indicator showing the operating condition.
(Refer page 5)

Horizontal defl ector

●

Vertical defl ector

(Air Outlet)

(Refer page 13)

Remote controller

Send out operation signal to the indoor unit. So as
to operate the whole unit.
(Refer page 6)

OUTDOOR UNIT

Drain pipe

Condensed water drain to outside.

Connecting cord and insulation pipe for piping

Air inlet (Back and Left side)

Air outlet

WIDTH (mm)

900

850

MODEL

RAS-S24HPA(EG)

RAC-S24HPA(EG)

HEIGHT (mm)

300

650

DEPTH (mm)

230

298

MODEL NAME AND DIMENSIONS

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ENGLISH

INDOOR UNIT INDICATORS

TEMPORARY SWITCH

Use this switch to start and stop when the remote controller does not work.

Normal operation:

● 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.

Force cooling operation: (For servicing purpose only)

● By pressing and hold the temporary switch for more than 5 second, the unit will enter “Force Cooling

Operation”.

● Press again the temporary switch to cancel the force cooling operation.

● Do not operate in this mode for more than 5 minutes.

*

To be conduct by authorised personel only.

OPERATION INDICATOR

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 fi lter. The lamp goes out when the
“ (AUTO SWING)” button is pressed while the
device is on “STANDBY MODE”.

OPERATION LAMP

This lamp lights during operation.
The OPERATION LAMP fl ashes 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 every one

hour when frost forms on the heat exchanger of the
outdoor unit, for 5–10 minutes each time.

TIMER LAMP

This lamp lights when the timer is working.

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NAMES AND FUNCTIONS OF REMOTE CONTROL UNIT

REMOTE CONTROLLER

This controls the operation of the indoor unit. The range of control is about 7 meters. If indoor lighting
is controlled electronically, the range of control may be shorter.
This unit can be fi xed on a wall using the fi xture provided. Before fi xing it, make sure the indoor unit
can be controlled from the remote controller.

● Transmission sign

The transmission sign blinks when a signal is sent.

● Display

This indicates the room temperature selected, timer status, function

and intensity of circulation selected.

● HEATING button

Use this button to set heating mode in the room or start operation.

● DEHUMIDIFYING button

Use this button to reduce humidity in the room or start operation.

● COOLING button

Use this button to set cooling mode in the room or start operation.

● RESET button

● SUPER COOLING button

Use this button to set super cooling operation or start operation

(cooling function only).

● STOP button

Press this button to stop operation only.

● PARALLEL SWING button

Controls the angle of the vertical air defl ectors to parallel.

● 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).

● AUTO SWING button

Controls the angle of the horizontal air defl ector.

● TEMPERATURE button

Use this button 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.

● ON-TIMER button Select to turn ON time.

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

fl oor, 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.

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ENGLISH

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 or LOW automatically when the preset
temperature has been reached.

(HI) : Economical as the room will become warm

quickly.

But you may feel a chill at the beginning.

(MED) : 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.

1

2

3

START

STOP

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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.

■ 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.

■ As the settings are stored in memory in the remote controller, you

only have to press the (DEHUMIDIFY) button next time.

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.

2

Press the button so that the display indicates

(DEHUMIDIFY).
Dehumidifying operation starts with a beep.
The FAN SPEED is set at LOW automatically.
The FAN SPEED button does not work.

1

Press the (STOP) button to stop operation.

STOP

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