Hitachi RAS-S18CAK, RAC-S18CAK User Manual

SPLIT TYPE AIR CONDITIONER

INDOOR UNIT/OUTDOOR UNIT

MODEL

RAS-S18CAK / RAC-S18CAK

OUTDOOR UNIT INDOOR UNIT

RAS-S18CAK

RAC-S18CAK

ENGLISH

Instruction manual

To obtain the best performance, please read this instruction manual completely.

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Page 1~22

SAFETY PRECAUTION

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Please read the “Safety Precaution” carefully before operating the unit to ensure correct usage of the unit.

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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.

Make sure to connect earth line.

Indicates the instructions that must be followed.

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Please keep this manual after reading.

PRECAUTIONS DURING INSTALLATION

●

Do not reconstruct the unit.

Water leakage, fault, short circuit or  re may occur if you reconstruct the unit by yourself.

●

Please ask your sales agent or quali ed technician for the installation of your unit. Water

WARNING

CAUTION

leakage, short circuit or  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.

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A circuit breaker should be installed depending on the mounting site of the unit. Without

a circuit breaker, the danger of electric shock exists.

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Do not install near location where there is  ammable gas. The outdoor unit may catch

 re if  ammable gas leaks around it.

●

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

●

Do not install the indoor unit in a machine shop or kitchen where vapor from oil or its

mist  ows to the indoor unit. The oil will deposit on the heat exchanger, thereby reducing
the indoor unit performance and may deform and in the worst case, breake the plastic
parts of the indoor unit.

PRECAUTIONS DURING SHIFTING OR MAINTENANCE

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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  re may occur if you continue to operate

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the unit under abnormal situation.

W

●

Please contact your agent for maintenance. Improper self maintenance may cause electric

A

shock and  re.

R
N

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Please contact your agent if you need to remove and reinstall the unit. Electric shock or  re

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may occur if you remove and reinstall the unit yourself improperly.

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

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authorized service/parts centers.

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The sign in the  gure indicates prohibition.

PRECAUTIONS DURING OPERATION

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

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A
R
N

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

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G

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Do not insert a  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.

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PRECAUTIONS DURING OPERATION

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The product shall be operated under the manufacturer speci cation and

not for any other intended use.

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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 insuf 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.

●

Please ensure that outdoor mounting frame is always stable,  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.

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Do not use any aerosol or hair sprays near the indoor unit. This chemical
can adhere on heat exchanger  n and blocked the evaporation water  ow
to drain pan. The water will drop on tangential fan and cause water splashing

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out from indoor unit.

C
A
U
T

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

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

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

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

ENGLISH

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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  ow as it is bad for the plants.

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When operating the unit with the door and windows opened, (the room humidity is always above

80%) and with the air de ector facing down or moving automatically for a long period of time,
water will condense on the air de ector and drips down occasionally. This will wet your furniture.
Therefore, do not operate under such condition for a long time.

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If the amount of heat in the room is above the cooling 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 in rm person 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.

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NAMES AND FUNCTIONS OF EACH PART

INDOOR UNIT

Pre- lter

To prevent dust from coming into the indoor unit.
(Refer page 17)

Front panel

Indoor unit indicators

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

OUTDOOR UNIT

MODEL NAME AND DIMENSIONS

Horizontal de ector
(Air Outlet)

(Refer page 12)

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

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Vertical de ector

MODEL

RAS-S18CAK

RAC-S18CAK

WIDTH (mm)

1030

850

– 4 –

HEIGHT (mm)

295

650

DEPTH (mm)

207

298

INDOOR UNIT INDICATORS

OPERATION INDICATOR

OPERATION LAMP

This lamp lights during operation.

TIMER LAMP

This lamp lights when the timer is working.

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

● This  gure shows the opening condition of

front panel. Refer to page 16 in relation to
how to open or close the front panel.

ENGLISH

TEMPORARY SWITCH

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

● 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.

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NAMES AND FUNCTIONS OF REMOTE CONTROL UNIT

REMOTE CONTROLLER

This controls the operation of the indoor unit. Signal range to reach indoor unit is about 7 meters. If
inverter lamp is used, the range of control may be shorter.
This unit can be  xed on a wall using the  xture provided. Before  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.

● CIRCULATION button

Use this button to set air circulation 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

● STOP button

Press this button to stop operation only.

● SLEEP button

Use this button to set the sleep timer.

● FAN SPEED selector

This determines the fan speed. Each 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 de ector.

● TEMPERATURE button

Use this button to raise or lower the temperature setting. (Keep

pressed, and the value will change more quickly.)

● OFF-TIMER button Select the turn OFF time.

● ON-TIMER button Select the 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

 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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COOLING OPERATION

Use the device for cooling when the outdoor temperature is 21 ~ 43°C.
If indoor humidity is very high (over 80%), some dew may form on the air outlet grille of the indoor unit.

Press the button so that the display indicates (COOL).
Cooling operation starts with a beep.
The cooling function does not start if the temperature setting
is higher than the current room temperature (even though

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the (OPERATION) lamp lights). The cooling function will
start as soon as you set the temperature below the current
room temperature.

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

ENGLISH

(AUTO) : The FAN SPEED is HI at  rst and varies to

2

(HI) : Hi fan speed mode.

(MED) : Medium fan speed mode.

(LOW) : Low fan speed mode.

Set the desired room temperature with the TEMPERATURE
button (the display indicates the setting).

3

The temperature setting and the actual room temperature may
vary somewhat depending on conditions.

STOP

Press the

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

only have to press the (COOLING) button to repeat the same
setting next time.

MED or LOW automatically when the preset
temperature has been reached.

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.

(STOP) button to stop operation.

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