Hitachi RAS-18EH2, RAC-18EH2 Instruction Manual

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ENGLISH

INDOOR UNIT

OUTDOOR UNIT

INDOOR UNIT/OUTDOOR UNIT

MODEL

RAS-18EH2

RAC-18EH2

RAS-18EH2/RAC-18EH2

SPLIT TYPE AIR CONDITIONER

Instruction manual Page 1~24

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

Инструкция по эксплуатации

стр. 25~48

Для правильной работы данного устройства обязательно полностью прочитайте данную инструкцию.

– 2 –

SAFETY PRECAUTION

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.

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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!

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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.

Make sure to connect earth line.

The sign in the fi gure indicates prohibition.

Indicates the instructions that must be followed.

● Please keep this manual after reading.

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.

● Be sure to use the specifi ed 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 near 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

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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 19)

Front panel

Indoor unit indicators

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

Horizontal defl ector

●

Vertical defl ector

(Air Outlet)

Remote controller

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

WIDTH (mm)

780

850

MODEL

RAS-18EH2

RAC-18EH2

HEIGHT (mm)

280

650

DEPTH (mm)

215

298

MODEL NAME AND DIMENSIONS

OUTDOOR UNIT

DRAIN PIPE

Condensed water drain to outside.

CONNECTING CORD

AIR INLET (BACK, LEFT SIDE)

AIR OUTLET

● Air purifying fi lters are washable and can be use in 1 year time. Type number for this air purifying

fi lter is <SPX-CFH20>. Please use this number for ordering when you want to renew it.

● Air purifying fi lter should be cleaned every month or sooner if noticeable loading occurs. When

used overtime, it may loose its function. For maximum performance, it is recommended to replace
it every 1 year depending on application requirements.

NOTE

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ENGLISH

TEMPORARY
SWITCH

INDOOR UNIT INDICATORS

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.

TEMPORARY
SWITCH

Press

Press

Temporary Switch

Temporary Switch

Non-conductor Stick

Non-conductor Stick

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.

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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.

● 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 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.

● SLEEP button

Use this button to set the sleep timer.

● TEMPERATURE buttons

Use this buttons to raise or lower the temperature setting. (Keep pressed, and
the value will change more quickly.)

● 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.

● 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) to

(SILENT) (This button allows selecting the optimal or preferred fan speed for

each operation mode).

● AUTO SWING button

Controls the angle of the horizontal air defl ector.

● 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.

● Under 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.

● If you press the FUNCTION selector button during operation, the device

may stop for about 3 minutes for protection.

AUTO

HEAT

DEHUMIDIFY

COOL

FAN
FAN SPEED

SILENT
LOW
MED
HI

SLEEPING

STOP (CANCEL)

START (RESERVE)

START/STOP

TIME

TIMER SET

TIMER SELECTOR

ON TIMER
OFF TIMER

AUTO SWING

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ENGLISH

AUTOMATIC OPERATION

The device will automatically determine the mode of operation, HEAT, COOL or DEHUMIDIFY depending on
the current room temperature. The selected mode of operation will change when the room temperature varies.
However the mode of operation will not change when indoor unit connected to multi type outdoor unit.

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 airfl ow 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 airfl ow direction.
Note: 1. If you do not require Auto Restart Control, please consult your sales agent or OFF by remote

control.

2. Auto Restart Control is not available when Timer or Sleep Timer mode is set.

■ 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.
However the mode of operation will not change when indoor
unit connected to multi type outdoor unit.

● If the mode automatically selected by the unit is not

satisfactory, manually change the mode setting (heat,
dehumidify, cool or fan).

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.

START

STOP

Press the (FAN SPEED) button, AUTO, LOW and SILENT is
available.

1

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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.

● 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).

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) : Fan speed slow.

(LOW) : Fan speed slower.

(SILENT) : Fan speed ultra slower.

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.

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.

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 maximum time for defrosting is 20 minutes.
However, if it is connected to multi type outdoor unit, the maximum time for defrosting is 15 minutes.
(If the piping length used is longer than usual, frost will likely to form.)

2

3

1

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ENGLISH

DEHUMIDIFYING OPERATION

■ 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.

● The preset room temperature may not be reached depending on the number of people present in the room

or other room conditions.

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.

Press the (START/STOP) button. Dehumidifying 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.

START

STOP

Press the FUNCTION selector so that the display indicates
(DEHUMIDIFY).
The FAN SPEED is set at LOW or SILENT.

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.

1

2

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COOLING OPERATION

Use the device for cooling when the outdoor temperature is -10~ 43°C.
If in doors humidity is very high (80%), 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 fi rst and varies to

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

(HI) : Economical as the room will become cool

quickly.

(MED) : Fan speed slow.

(LOW) : Fan speed slower.

(SILENT) : Fan speed ultra slower.

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

The temperature setting and the actual room temperature may
vary some how 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.

START

STOP

1

2

3

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ENGLISH

FAN SPEED (AUTO)

.....

When the AUTO fan speed mode is set in the cooling/heating operation:

For the heating operation

● When the difference of room temperature and setting temperature is large,

fan starts to run at HI speed.

● After room temperature reaches the preset temperature, the heating

operation, which changes the fan speed and room temperature to obtain
optimum conditions for natural healthful heating will be performed.

● When the difference of room temperature and setting temperature is large,

fan starts to run at HI speed.

● After room temperature reaches the preset temperature, the cooling

operation, which changes the fan speed and room temperature to obtain
optimum conditions for natural healthful cooling will be performed.

For the cooling operation

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).

Press the (FAN SPEED) button.

(HI) : The strongest air blow.

(MED) : Fan speed slow.

(LOW) : Fan speed slower.

(SILENT) : Fan speed ultra slower.

Press the

(START/STOP) button. Fan operation starts with a

beep. Press the button again to stop operation.

START

STOP

1

2

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HOW TO SET THE TIMER

You can set the device to turn off
at the preset time.

After you change the
batteries;

How to Cancel Reservation

Point the signal window of the remote controller toward the indoor unit, and press the (CANCEL) button.
The (RESERVED) sign goes out with a beep and the (TIMER) lamp turns off on the indoor unit.

1

Press the (TIME) button.

1

Press the (OFF-TIMER)

button, until the

(OFF) mark

blinks on the display.

NOTE

You can set only one of the OFF-timer,
ON-timer and ON/OFF-timer.

● The device will turn on at

the designated times.

TIME

OFF TIMER

ON TIMER

RESERVE

CANCEL

2

Set the turn-off time

with the TIMER control
button.
Press the

(RESERVE)

button.

3

Press the (ON-

TIMER) button so that the

(OFF) mark lights and

the

(ON) mark blinks.

1

Press the (ON-TIMER)

button the

(ON) mark blinks

on the display.

● The device will turn on (off) and off
(on) at the designated times.

● The switching occurs fi rst at the
preset time that comes earlier.

● The arrow mark appearing on the
display indicates the sequence of
switching operations.

1

Press the (ON-OFF)

button so that the

(OFF)

mark blinks.

– 13 –

ENGLISH

● The time indication will disappear
automatically in 10 second.

● To check the current time setting,
press the

(TIME) button twice.

The setting of the current time is
now complete.

●

The timer may be used in three ways: off-timer, on-timer, and on/off (off/on)-timer. Set the current time at fi rst
because it serves as a reference.

● As the time settings are stored in memory in the remote controller, you only have to press the (RESERVE)

button in order to use the same settings next time.

2

Press the

(TIME) button.

3

Set the current time with the

TIMER control button.

Example: The current time is 1:30 p.m.

2

Set the turn-off time with the

TIMER control button.

The setting of turn-off time is now complete.

Example: The device will turn off at 11:00p.m.

Example:
The device will turn on at 7:00 a.m.
The setting of the turn-on time is now complete.

4

Set the turn-on time with the

TIMER control button.

5

Point the signal window of the remote controller toward the indoor unit, and

press the

(RESERVE) button.

The

(ON) mark starts lighting instead of fl ashing and the (RESERVED)

sign lights. A beep occurs and the

(TIMER) lamp lights on the indoor unit.

3

Point the signal window of the remote controller toward the indoor unit, and

press the

(RESERVE) button.

The

(ON) mark starts lighting instead of fl ashing and the (RESERVED)

sign lights. A beep occurs and the

(TIMER) lamp lights on the indoor unit.

2

Set the turn-on time with the

TIMER control button.

Example:
The device will turn off at 10:30 p.m. and it will be turned on
at 7:00 a.m.
The settings of the turn-on/off times are now complete.

4

Press the (TIME) button again.

The time indication starts lighting
instead of fl ashing.

3

Point the signal window of the remote controller toward the indoor unit, and

press the

(RESERVE) button.

The

(OFF) mark starts lighting instead of fl ashing and the sign (RESERVED)

lights. A beep occurs and the

(TIMER) lamp lights on the indoor unit.

– 14 –

HOW TO SET THE SLEEP TIMER

1

Set the ON-timer.

Set the current time at fi rst if it is not set before (see the pages for setting the current time). Press the
(SLEEP) button, and the display changes as shown below.

Mode

Sleep timer

1 hour 2 hours 3 hours 7 hours

Sleep timer off

44 44

1

Sleep Timer: The device will continue working for the designated 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. When the sleep timer has been set,
the display indicates the turn-off time.

Example: If you set 3 hours sleep
time at 11:38 p.m., the turn-off time
is 2:38 a.m.

2

Press the (SLEEP) button and set the sleep timer.

The device will be turned off by the sleep timer and
turned on by on-timer.

How to Cancel Reservation

Point the signal window of the remote controller toward the indoor unit, and press the (CANCEL) button.
The

(RESERVED) sign goes out with a beep and the (TIMER) lamp turns off on the indoor unit.

For heating:
In this case, the device will turn off in 2
hours (at 1:38 a.m.) and it will be turned on
6:00 next morning.

Indication

– 15 –

ENGLISH

HOW TO EXCHANGE THE BATTERIES IN THE REMOTE CONTROLLER

1

Remove the cover as shown in the fi gure and take out the old
batteries.

=

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

CIRCUIT BREAKER

When you do not use the room air conditioner, set the circuit breaker to “OFF”.

TEMPORARY SWITCH

If the remote controller does not work due to battery failure, press this switch to start and stop operation.

● This temporary operation will be at the setting made most recently. (The unit will immediately go into automatic

operation once power is switched on.)

Push and pull to the
direction of arrow

2

– 16 –

Suitable Room Temperature Install curtain or blinds

Ventilation Effective Usage Of Timer

Do Not Forget To Clean The Pre-Filter

Please Adjust Suitable Temperature

For Baby And Children

Warning

Freezing temperature
is bad for health and
a waste of electric
power.

It is possible
to reduce heat
entering the
room through
windows.

At night, please use the “OFF or ON timer
operation mode”, together with your wake
up time in the morning. This will enable you
to enjoy a comfortable room temperature.
Please use the timer effectively.

Dusty pre-fi lter will reduce the air volume and
the cooling effi ciency. To prevent from wasting
electric energy, please clean the pre-fi lter
every 2 weeks.

Please pay attention to the room temperature
and air fl ow direction when operating the unit
for baby, children and old folks who have
diffi culty in movement.

Caution

Do not close the room for a long period of time.
Occasionally open the door and windows to
allow the
entrance
of fresh air.

THE IDEAL WAYS OF OPERATION