Hitachi RAS-10EH2, RAC-10EH2 user guide manual

SPLIT TYPE AIR CONDITIONER

INDOOR UNIT/OUTDOOR UNIT

MODEL

RAS-10EH2/RAC-10EH2
RAS-14EH2/RAC-14EH2

ENGLISH

OUTDOOR UNIT

RAC-10EH2

RAC-14EH2

Instruction manual Page 1~20

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

INDOOR UNIT

RAS-10EH2
RAS-14EH2

Инструкция по эксплуатации Стр. 21-40

Для получения наилучших эксплуатационных
характеристик и обеспечения беспроблемной
эксплуатации в течение длительного времени,
прочтите полностью данное руководство по
эксплуатации.

07K162_RAS-10_14EH2_COVER 2007.10.17, 08:331

< 466 : A >

– 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.)

Warning” and “ Caution”. The “Warning” section contains

MEMO

This sign in the figure indicates prohibition.

• 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 230V power source is used.
The use of other power sources may cause electrical components to overheat
and lead to fire.

Indicates the instructions that must be followed.

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.

“OFF”

PROHIBITION

PROHIBITION

PROHIBITION

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WARNING

PRECAUTIONS DURING OPERATION

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

“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.

DON’T WET

• When operating the unit with burning equipments, regularly ventilate
the room to avoid oxygen insufficiency.

PROHIBITION

• During thunder storm, disconnect the plug top or turn off the circuit breaker.

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

STRICTLY OBSERVE

PRECAUTIONS

• 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.

PROHIBITION

ENGLISH

PROHIBITION

PROHIBITION

CAUTION

• 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.

• 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
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

PROHIBITION

PROHIBITION

PROHIBITION

DON’T TOUCH

• Do not touch the refrigerant pipe and connecting valve.
Burns may result.

• 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.

06L176_RAS-10_14EH1_En 12/1/06, 11:41 AM3

• Do not touch the air outlet, bottom surface and aluminum fin of the outdoor
unit.
You may get hurt.

DON’T TOUCH

– 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

Indoor unit indicators

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

Horizontal deflector Vertical 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

RAC-10EH2

Air outlet

When “heating” operation is performed,
cool air blows and when “cooling” or
“dehumidifying” operation is performed,
warm air blows.

Drain port (Bottom)

Earth terminal

RAC-14EH2

Drain port (Bottom)

(Lower section of the side)

Air outlet

When “heating” operation is
performed, cool air blows
and when “cooling” or
“dehumidifying” operation is
performed, warm air blows.

Earth terminal

(Lower section of the side)

MODEL NAME AND DIMENSIONS

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)

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)

About the outdoor unit:

• When “Stop” is selected during operation of
the indoor unit, the fan of the outdoor unit
continues 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.

RAS-10EH2, RAS-14EH2 780 280 220
RAC-10EH2 700 505 258
RAC-14EH2 750 548 288

07K162_RAS-10_14EH2_En 2007.10.17, 08:294

MODEL WIDTH (mm) HEIGHT (mm) DEPTH (mm)

– 4 –

NAMES AND FUNCTIONS OF EACH PART

INDOOR UNIT INDICATIONS

FILTER LAMP (Green)

When the device is operated for a total of about 200
hours, the FILTER lamp lights indicates that it is time

POWER SWITCH

to clean the filter.The lamp goes out when the

“

operation is stopped.

OPERATION LAMP (Yellow)

This lamp lights during operation.
The OPERATION LAMP flashes in the following
cases during heating.

(1) During preheating

(2) During defrosting

TIMER LAMP (Orange)

This lamp lights when the timer is working.

ENGLISH

(AUTO SWING)” button is pressed while the

For about 2-3 minutes after starting up.

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 air cleansing and deodorizing filters (Accessories) to the filter frame.

• Attach the air cleansing and deodorizing filters to the frame 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 air cleansing and deodorizing filters
are used.

• Air cleansing and deodorizing filters can be used for about 2
years. When you want to renew it, please ask your sales agent.

• Optional air cleansing and deodorizing filters (SPX-CFH15).

Frame

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– 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 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.

● AUTO SWING button

Controls the angle of the horizontal air deflector.

● 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).
(This button allows selecting the optimal or preferred fan speed for each
operation mode.)

● SLEEP button

Use this button to set the sleep timer.

● TEMPERATURE buttons

Use these 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 button

Press this button after the batteries are replaced or when some irregular
operation is found.

● 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

● AUTO SWING button

● TIMER control

Use these buttons to set the timer.

AUTO

HEAT

DEHUMIDIFY

COOL

FAN

FAN SPEED

LOW
MED
HI

SLEEPING

STOP (CANCEL)

START (RESERVE)

START/STOP

TIME

TIMER SET

TIMER SELECTOR

ON TIMER

OFF TIMER

AUTO SWING

● 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.

– 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

The device will automatically determine the mode of operation, HEAT or COOL depending on the
initial room temperature. The selected mode of operation will change when the room temperature
varies.

Press the FUNCTION selector so that the display indicates the

(AUTO) mode of operation.

1

• When AUTO has been selected, the device will automatically
determine the mode of operation, HEAT or COOL depending
on the current room temperature.

• When AUTO is first selected, the device will determine the
current room temperature and select the proper operation
mode accordingly.

• When the air conditioner has adjusted the room's temperature
to the near preset temperature, it will begin to monitor
operation. If the room temperature subsequently changes,
the air conditioner will once again select the appropriate
operation (heating or cooling) to adjust the temperature to
the preset temperature. The monitoring operation range is

+

3°C relative to the preset temperature.

• If the mode automatically selected by the unit is not
satisfactory, manually change the mode setting (heat,
dehumidify, cool or fan).

ENGLISH

START

STOP

Press the (START/STOP) button.
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

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.

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

– 7 –

(START/STOP) button next time.

06L176_RAS-10_14EH1_En 12/1/06, 11:58 AM7

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

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.

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.

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.

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.

(If the piping length used is longer than usual, frost will likely to form.)

06L176_RAS-10_14EH1_En 11/30/06, 3:38 PM8

– 8 –

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.

Press the FUNCTION selector so that the display indicates

1

(DEHUMIDIFY).

The FAN SPEED is set at LOW automatically.
The FAN SPEED button does not work.

ENGLISH

START

Press the (START/STOP) button.

STOP

■ When you want to change the operation mode, please use the
FUNCTION selector.

■ Set the desired temperature is available.

■ You also can use the FUNCTION selector to select this operation.

■ Dehumidifying Function

• Dehumidifying takes place with a target temperature which is slightly lower than the room
temperature setting. (However, target temperature is 16°C for a temperature setting of 16°C.)
If the room temperature becomes lower than the target value, operation stops. If the room
temperature becomes higher than the target value, operation restarts.

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

06L176_RAS-10_14EH1_En 11/30/06, 3:38 PM9

– 9 –

COOLING OPERATION

Use the device for cooling when the outdoor temperature is -10 to 42°C.
If humidity is very high (over 80%) indoors, some dew may form on the air outlet grille of the indoor
unit.

Press the FUNCTION selector so that the display indicates

1

2

(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
buttons (the display indicates the setting).

3

START

STOP

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.

06L176_RAS-10_14EH1_En 11/30/06, 3:38 PM10

– 10 –

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

1

(FAN).

Press the (FAN SPEED) button.

ENGLISH

FAN SPEED (AUTO)

For the heating operation

For the cooling operation

2

(HI) : The strongest air blow.

(MED) : Quiet.

(LOW) : More quiet.

START

STOP

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

• The fan speed will automatically change according to the temperature of

• As room temperature reaches the preset temperature, a very light breeze

• Operation starts in the “HI” mode to reach the preset temperature.

• As room temperature approaches the preset temperature, fan speed auto-

Press the (START/STOP) button. Fan operation starts with a
beep.
Press the button again to stop operation.

discharged air.

will blow.

matically switches to “LOW”.

06L176_RAS-10_14EH1_En 11/30/06, 3:38 PM11

– 11 –

HOW TO SET THE TIMER

AM

TIME, DAY,
MONTH (current
time, day, month)

Time, Day, Month

After you change the
batteries;

1

Set the current month and day

with the TIMER control button.

OFF TIMER

ON TIMER

OFF-Timer

RESERVE

CANCEL

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

ON-Timer

The device will turn on at the
designated times.

Start

Stop

Stop

M D

Start

DM

1

Press the (OFF-TIMER)
button. The (OFF) mark blinks
on the display.

AM

1

Press the (ON-TIMER)
button. The (ON) mark blinks on
the display.

ON/OFF-Timer

Start Stop

1

Press the (OFF­TIMER) button so that
the (OFF) mark
blinks.

2

Set the turn-off time
with the TIMER control
button.

Press the (RESERVE)

3

Press the (ON-

TIMER) button so that the

(OFF) mark lights and

the (ON) mark blinks.

button.

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

• The switching occurs first at the
preset time that comes earlier.

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

PM

PM

PM

AM

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.

NOTE

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

06L176_RAS-10_14EH1_En 11/30/06, 3:38 PM12

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