Hitachi RAD-18NH7, RAD-25NH7, RAD-35NH7, RAD-50NH7 Instruction Manual

– 1 –

ENGLISH

SPLIT TYPE AIR CONDITIONER

INDOOR UNIT

INDOOR UNIT

MODEL

RAD-18NH7
RAD-25NH7
RAD-35NH7
RAD-50NH7

Instruction manual Page 1~20

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

Bedlenungsanleitung Suite 21~40

Bitte lesen Sie diese Bedienungsanleitung aufmerksam
durch, um durch richtige Bedienung jahrelangen und
störungsfreien Betrieb zu gewährleisten.

Mode d’emploi Page 41~60

Des performances optimales et un fonctionnement à long
terme seront assurés en appliquant les présentes
instructions après avoir entièrement lu ce mode d’emploi.

Manuale di istruzioni Pag. 61~80

Per garantire la migliore prestazione e la più lunga
durataleggere attentamente e al completo le seguanti
istruzioni.

Manual de instrucciones Página 81~100

Para obtener el mejor funcionamiento y asegurar años de
uso libre de problemas, lea cuidadosamente este manual
de instrucciones.

Manual de instruções Página 101~120

A fim de obter um bom funcionamento e de garantir uma
utilização sem falhas durante muitos anos, é favor ler este
manual de instruções completamente.

O‰ЛБ›В˜ XВИЪИЫМФ‡ ™ÂÏ›‰· 121~140
°И· ЩЛУ О·П‡ЩВЪЛ ‰˘У·Щ‹ ·fi‰ФЫЛ О·И ЩЛУ М·ОЪФ¯ЪfiУИ·
О·И ¯ˆЪ›˜ ЪФ‚П‹М·Щ· ¯Ъ‹ЫЛ ЩЛ˜ Ы˘ЫОВ˘‹˜ ·˘Щ‹˜,
·Ъ·О·ПФ‡МВ ‰И·‚¿ЫЩВ П‹Ъˆ˜ ЩИ˜ Ф‰ЛБ›В˜ ¯ВИЪИЫМФ‡ ЩЛ˜.

Инструкция по эксплуатации

стр. 141~160
Для обеспечения наилучших эксплуатационных
характеристик и многолетней безотказной работы
оборудования необходимо ознакомиться с данной
Инструкцией по эксплуатации.

RAD-18NH7
RAD-25NH7
RAD-35NH7
RAD-50NH7

– 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.

W
A
R
N

I
N
G

!

●

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.

●

If the supply cord is damaged, it must be replaced by the special cord obtainable
at authorized service/parts centers.

●

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.

W

A
R
N

I
N
G

!

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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 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 place plants directly under the air flow as it is bad for the plants.

●

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.

●

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.

●

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.

C
A
U
T

I
O
N

!

●

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 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.

– 4 –

MULTI-AIR CONDITIONER

With this multi-air conditioner, several indoor units can be connected to one outdoor unit to be driven. You
can operate the required number of indoor units.

Combination of Operations:

● You cannot operate the indoor units in
the following combinations.

● The indoor unit which is switched on first continues

to operate, but other indoor units which is switched
on later does not operate while the lamp lights.

● To re-start an indoor unit which was operated later,

stop the indoor unit which was operated first or
later and reset the type of operation, then perform
operation again.

One unit

Heating

Other unit

Cooling

Dehumidifying

Circulating (fan)

Adjusting the Number of Indoor
Units:

Decrease the number of
indoor units to be operated
especially when it is very
hot or cold or when you
want to reach the present
temperature quickly.

Stopped Indoor Units:

When an indoor unit is operated in the
cooling, heating or dehumidifying mode in
the room, the sound of refrigerant flow may
be heard from a stopped indoor unit or a
stopped indoor unit may become warm.
This is because the indoor unit returns
refrigerant to the outdoor unit to be ready
for operation.

When operation mode is selected:

● When heating operation is automatically selected for the first indoor unit, the next indoor unit will then

start to heat. Also, if cooling or dehumidifying is automatically selected for the first indoor unit, the next
indoor unit will also start to cool or dehumidify.

During automatic operation:

– 5 –

ENGLISH

INDOOR UNIT

NAMES AND FUNCTIONS OF EACH PART

WIDTH (mm)

750

MODEL

RAD-18NH7/RAD-25NH7/RAD-35NH7/RAD-50NH7

HEIGHT (mm)

235

DEPTH (mm)

400

MODEL NAME AND DIMENSIONS

Electrical
box

Air outlet

Filter

Air inlet

– 6 –

NAMES AND FUNCTIONS OF REMOTE CONTROL UNIT

■ This controls the operation function and timer setting of the room air conditioner.

Hr.

START/STOP Button

12

Use this button to select the
operating mode. Every time you
press it, the mode will change from
(AUTO) to (HEAT) to
(DEHUMIDIFY) and to (COOL)
cyclically.

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).

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 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.

– 7 –

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.

■ 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.

1

START

STOP

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.

(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.
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.

FAN SPEED (AUTO)

.....

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

For the heating operation

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

discharged air.

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

fan starts to run at HI speed.

● When the room temperature reaches setting temperature, fan speed changes

to LOW automatically.

● 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

– 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.

● 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 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) : Fan speed slow.

(LOW) : Fan speed 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.

1

2

3

START

STOP

– 9 –

ENGLISH

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.

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

– 10 –

COOLING OPERATION

Use the device for cooling when the outdoor temperature is –10 ~ 43°C.
If indoor 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 first 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.

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.

1

2

START

STOP

3

– 11 –

ENGLISH

TIMER RESERVATION

■ ON Timer and OFF Timer are available.

1

OFF TIME setting

● Select the OFF TIME by pressing the (OFF)

Button.

● Setting time will change according to the below

sequence when you press the button.

● The value change quicker if you keep pressing the

button.

OFF Timer Reservation

■ Operation stop at setting time

2

Press the (Reserve) button

● OFF TIMER reserved with a signal received sound

“beep”.

● The (OFF) Mark starts lighting instead of blinking.

0.5 1.0 1.5 9.5 10 11 12

0.5 hour interval 1 hour interval

1

ON TIME setting

● Select the ON TIMER by pressing the (ON)

Button.

● At the beginning of setting, time 6 hours was set.

● Setting time will change according to the below

sequence.

● The value change quicker if you keep pressing the

button.

ON Timer Reservation

0.5 1.0 1.5 9.5 10 11 12

0.5 hour interval 1 hour interval

1

Press the (Cancel) button

● As the time settings are stored in remote controller

memory, you only have to press the (Reserve)
button in order to use the same setting next time.

CANCELLATION of Timer Reservation

2

Press the (Reserve) button

● ON TIMER reserved with a signal received sound

“beep”.

● The (ON) Mark starts lighting instead of blinking.

■ Operation will start for setting

temperature at setting time (The starting
time may different depend on the room
temperature and set temperature).

Hr.

Hr.

Hr.

Hr.

– 12 –

HOW TO SET THE SLEEP TIMER

Mode

Sleep timer

Indication

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.

Press the SLEEP button, indoor unit will produce a beep.
The timer information will be displayed on the remote controller.

How to Cancel Reservation

Press the (CANCEL) button. The (RESERVED) sign goes out with a beep.

Example: Setting 3 hours
sleep time.

Hr.

– 13 –

ENGLISH

Explanation of the sleep timer

The device will control the FAN SPEED and room temperature
automatically so as to be quiet and good for people’s health.

● If you set the sleep timer after the off or on-timer has been

set, the sleep timer becomes effective instead of the off or
on-timer set earlier.

● You can not set other timer during sleep timer operation.

● After sleep timer time is up and when press sleep button

again, the sleep timer will be set as last setting.

● Sleep timer effective only once.

NOTE