Hitachi RAK-25N5 User manual

– 1 –
ENGLISH
SPLIT TYPE AIR CONDITIONER
INDOOR UNIT
MODEL
RAK-25N5
RAK-35N5
RAK-50N5
RAK-65N5
Instruction manual Page 1~28
To obtain the best performance and ensure years of trouble free use, please read this instruction manual completely.
INDOOR UNIT
RAK-25N5
RAK-35N5
RAK-50N5
RAK-65N5
(EN1) RAK-25-35-50-65N5.indd 1 11/29/10 2:12 PM

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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.
SAFETY PRECAUTION
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
●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.
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
!
!
PRECAUTIONS DURING OPERATION
●Avoid an extended period of direct air flow for your health.
W
A
R
N
I
N
G
!
●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.
!
!
(EN1) RAK-25-35-50-65N5.indd 2 11/29/10 2:12 PM

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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.
(EN1) RAK-25-35-50-65N5.indd 3 11/29/10 2:12 PM

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INDOOR UNIT
NAMES AND FUNCTIONS OF EACH PART
Air filter
To prevent dust from coming into the indoor unit.
(Refer page 22)
Front panel
Indoor unit indicators
Light indicator showing the operating condition.
(Refer page 5)
Horizontal deflector ●Vertical deflector
(Air Outlet)
(Refer page 16)
Remote controller
Send out operation signal to the indoor unit. So as
to operate the whole unit.
(Refer page 7)
WIDTH (mm)
780
1030
MODEL
RAK-25N5, RAK-35N5, RAK-50N5
RAK-65N5
HEIGHT (mm)
280
295
DEPTH (mm)
215
191
MODEL NAME AND DIMENSIONS
Air filter
To prevent dust from coming into the indoor unit.
(Refer page 23)
Front panel
Indoor unit indicators
Light indicator showing the operating condition.
(Refer page 6)
Horizontal deflector ●Vertical deflector
(Air Outlet)
(Refer page 16)
Remote controller
Send out operation signal to the indoor unit. So as
to operate the whole unit.
(Refer page 7)
RAK-25N5
RAK-35N5
RAK-50N5
RAK-65N5
(EN1) RAK-25-35-50-65N5.indd 4 11/29/10 2:12 PM

– 5 –
ENGLISH
INDOOR UNIT INDICATORS
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 filter.
OPERATION LAMP
This lamp lights during operation.
TIMER LAMP
This lamp lights when the timer is working.
RAK-25N5
RAK-35N5
RAK-50N5
OPERATION INDICATOR
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.
(EN1) RAK-25-35-50-65N5.indd 5 11/29/10 2:12 PM

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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 automatic mode.
●This figure shows the opening condition of
front panel. Refer to page 21 in relation to
how to open or close the front panel.
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 filter. 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.
TIMER LAMP
This lamp lights when the timer is working.
RAK-65N5
INDOOR UNIT INDICATORS
(EN1) RAK-25-35-50-65N5.indd 6 11/29/10 2:12 PM

– 7 –
ENGLISH
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 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.
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.
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 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.
TIME button
Use this button to set and check the time and date.
RESET button
FUNCTION selector
Use this button to select the operating mode. Every time you press it,
the mode will change from (AUTO) to (COOL) to (DEHUMIDIFY)
to (CIRCULATION) 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)
(during the (FAN) mode, from HI to MED to LOW).
AUTO SWING button
Controls the angle of the horizontal air deflector.
TIMER control
Use this button to set the timer.
RESERVE button Time setting reservation.
CANCEL button Cancel time reservation.
(EN2) RAK-25-35-50-65N5.indd 7 11/29/10 2:25 PM

  
°C
RESET
AUTOMATIC OPERATION
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■              
    
         
  
●          
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           
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● 
  
●             
          



      
VARIOUS FUNCTIONS
■Auto Restart Control
●
  
         
●                  
 

                    
                
 

– 9 –
ENGLISH
RESET
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
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– 10 –
RESET
OO ING OPERATION
Use the device for cooling when the outdoor temperature is 21-43°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 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
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ENGLISH
RESET
FAN SPEED (AUTO) ..... When the AUTO fan speed mode is set in the cooling 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 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.
Press the (START/STOP) button. Fan operation starts with
a beep. Press the button again to stop operation.
1
2
START
STOP
(EN2) RAK-25-35-50-65N5.indd 11 11/29/10 12:38 PM

– 12 –
H
HO TO ET THE EEP TIMER
1Set the ON-timer.
Set the current time at first 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
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.
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.
2Press 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
turn on early so that the preset
temperature will be almost reached
at 6:00 next morning.
SLEEP
H
H
AM
AM
Sleep
timer Start
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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 date or current time is not set, sleep timer can not be set.
●If you set the sleep timer after the off-, on/off- or off/on-timer has been
set, the sleep timer becomes effective instead of the off-, on/off- or
off/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
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– 14 –
RESET
HOW TO SET THE TIMER
You can set the device to turn off
at the present 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.
1Set the current month and day
with the TIMER control button.
1Press the (OFF-TIMER)
button. 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, DAY,
MONTH
(current time,
day, month)
OFF TIMER
ON TIMER
RESERVE
CANCEL
M
D
M
D
AM
STOP
Start
AM
Start
Stop
PM
Start Stop
PM
AM
PM
1Press 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 first at the
preset time that comes earlier.
The arrow mark appearing on the
display indicates the sequence of
switching operations.
1Press the (ON-OFF)
button so that the (OFF)
mark blinks.
2Set the turn-off time
with the TIMER control
button.
Press the (RESERVE)
button.
3Press the (ON-
TIMER) button so that the
(OFF) mark lights and
the (ON) mark blinks.
(EN2) RAK-25-35-50-65N5.indd 14 11/29/10 2:33 PM

– 15 –
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 first 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.
2Press the
(TIME) button.
3Set the current time with the
TIMER control button.
Example: The current time is 1:30 p.m.
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.
4Set the turn-on time with the
TIMER control button.
5Point the signal window of the remote controller toward the indoor unit, and
press the (RESERVE) button.
The (ON) mark starts lighting instead of flashing and the (RESERVED)
sign lights. A beep occurs and the (TIMER) lamp lights on the indoor unit.
3Point the signal window of the remote controller toward the indoor unit, and
press the (RESERVE) button.
The (ON) mark starts lighting instead of flashing and the (RESERVED)
sign lights. A beep occurs and the (TIMER) lamp lights on the indoor unit.
2Set 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.
4Press the (TIME) button again.
The time indication starts lighting instead of flashing.
PM PM
AM PM
PM
PM
AM AM
AM
AM
PM
PM
3Point the signal window of the remote controller toward the indoor unit, and
press the (RESERVE) button.
The (OFF) mark starts lighting instead of flashing and the sign (RESERVED)
lights. A beep occurs and the (TIMER) lamp lights on the indoor unit.
2Set the turn-off time with the
TIMER control button.
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– 16 –
AD U TING THE AIR DEF E TOR
1
2Adjustment of the conditioned air to the left and right.
Hold the vertical air deflector as shown in the figure
and adjust the conditioned air to the left and right.
●If the “ (AUTO SWING)” button
is pressed once, the horizontal air deflector
swings up and down. If the button is pressed
again, the deflector stops in its current
position. Several seconds (about 6 seconds)
may be required before the deflector starts
to move.
●Use the horizontal air deflector within the
adjusting range shown on the right.
●When the operation is stopped, the
horizontal air deflector moves and stops at
the position where the air outlet closes.
!
CAUTION
●In “Cooling” operation, do not keep the
horizontal air deflector swinging for a long
time. Some dew may form on the horizontal
air deflector and dew may drop.
RESET
Adjustment of the conditioned air in the upward
and downward directions.
The horizontal air deflector is automatically set to
the proper angle suitable for each operation. The
deflector can be swung up and down continuously
and also set to the desired angle using the
“ (AUTO SWING)” button.
RAK-25N5
RAK-35N5
RAK-50N5
RAK-65N5
RAK-65N5
RAK-25N5
RAK-35N5
RAK-50N5
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– 17 –
ENGLISH
1Remove the cover as shown in the figure and take out the
old batteries.
=
2Install 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
!
(EN3) RAK-25-35-50-65N5.indd 17 11/29/10 2:41 PM

– 18 –
Suitable Room Temperature Install curtain or blinds
Ventilation Effective Usage Of Timer
Do Not Forget To Clean The Air 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 air filter will reduce the air volume and
the cooling efficiency. To prevent from wasting
electric energy, please clean the filter every
2 weeks.
Please pay attention to the room temperature
and air flow direction when operating the unit
for baby, children and old folks who have
difficulty 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 IDEA AY OF OPERATION
(EN3) RAK-25-35-50-65N5.indd 18 11/29/10 12:27 PM

– 19 –
ENGLISH
FOR USER’S INFORMATION
The Air Conditioner And The Heat Source In The Room
Not Operating For A Long Time
When Lightning Occurs
Caution
If the amount of heat in the room is above the cooling
capability of the air conditioner (for example: more
people entering the room, using heating equipments
and etc.), the preset room temperature cannot be
achieved.
!
When the indoor unit is not to be used for a long
period of time, please switch off the power from the
mains. If the power from mains remains “ON”, the
indoor unit still consumes about 8W in the operation
control circuit even if it is in “OFF” mode.
Warning
To protect the whole unit during lightning, please
stop operating the unit and remove the plug from
the socket.
!
OFF
Interference From Electrical Products
Caution
To avoid noise interference, please place the indoor
unit and its remote controller at least 1m away from
electrical products.
!
(EN3) RAK-25-35-50-65N5.indd 19 11/29/10 2:43 PM

– 20 –
ATTA HING THE AIR EAN ING FI TER
1Open the front panel.
●Pull up the front panel by holding it at both sides
with both hands.
2Remove the filter.
●Push upward to release the claws and pull out the
filter.
3Attaching the air cleansing filters to the filter.
●Attach the air cleansing filters to the frame by
gently compress its both sides and release after
insertion into filter frame.
4Attach the filters.
●Attach the filters by ensuring that the surface written
“FRONT” is facing front.
●After attaching the filters, push the front panel at
three arrow portion as shown in figure and close it.
Cleaning and maintenance must be carried out only by qualified service personal. Before cleaning,
stop operation and switch off the power supply.
CAUTION
CAUTION
Do not bend the air cleansing
filter as it may cause damage
to the structure.
NOTE
●In case of removing the air cleansing filters, please follow the above procedures.
●The cooling capacity is slightly weakened and the cooling speed becomes slower when the air cleansing
filters are used. So, set the fan speed to "HIGH" when using it in this condition.
●Air cleansing filters are washable and reusable up to 20 times by using vacuum cleaner or water
rinse under running tap water. Type number for this air cleansing filter is <SPX-CFH11>. Please use
this number for ordering when you want to renew it.
●Do not operate the air conditioner without filter. Dust may enter the air conditioner and fault may
occur.
!
!
RAK-25N5
RAK-35N5
RAK-50N5
(EN3) RAK-25-35-50-65N5.indd 20 11/29/10 12:27 PM