Hitachi RAK-50N6 User manual

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SPLIT TYPE AIR CONDITIONER
INDOOR UNIT
MODEL
RAK-25N6
RAK-35N6
RAK-50N6
INDOOR UNIT
Instruction manual Page 1~24
To obtain the best performance and ensure years of trouble free use, please read this instruction manual completely.
RAK-25N6
RAK-35N6
RAK-50N6

– 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.
●
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 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
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!
PRECAUTIONS DURING OPERATION
●Avoid an extended period of direct air flow for your health.
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●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.
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.
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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 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.
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●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 –
INDOOR UNIT
NAMES AND FUNCTIONS OF EACH PART
Air filter
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 deflector ●Vertical deflector
(Air Outlet)
(Refer page 14)
Remote controller
Send out operation signal to the indoor unit. So as to
operate the whole unit.
(Refer page 6)
WIDTH (mm)
780
MODEL
RAK-25N6/RAK-35N6/RAK-50N6
HEIGHT (mm)
280
DEPTH (mm)
220
MODEL NAME AND DIMENSIONS

– 5 –
INDOOR UNIT INDICATORS
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.
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 lter. The lamp goes out when
the “ (AUTO SWING)” button is pressed
on the Remote Controller 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-25-35-50N6 (1).indd 5 6/7/10 4:23 PM

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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 fixed on a wall using the fixture provided. Before fixing it, make sure the indoor unit can
be controlled from the remote controller.
●Transmission sign
The transmission sign blinks when a signal is sent.
●Display
This indicates the room temperature selected, timer status, function
and intensity of circulation selected.
●CIRCULATION button
Use this button to set air circulation in the room or start operation.
●DEHUMIDIFYING button
Use this button to dehumidify the room or start operation.
●COOLING button
Use this button to set cooling mode in the room or start operation.
●RESET button
●SPEED COOL buttonA
Use this button to deliver faster and more comfortable air-
conditioning.TO
●STOP button
Press this button to stop operation only.
●SUPER SILENT button
Use this button to set silent condition.
●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).
●AUTO SWING button
Controls the angle of the horizontal air deflector.
●TEMPERATURE button
Use this button to raise or lower the temperature setting. (Keep
pressed, and the value will change more quickly.)
●SLEEP button
Use this button to set the sleep timer.
●ON-TIMER button Select to turn ON time.
Precautions for Use
●Do not put the remote controller in the following places.
●In direct sunlight.
●In the vicinity of a heater.
●Handle the remote controller carefully. Do not drop it on the
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.
CIRCULATION / START
DEHUMIDIFY / START
COOLING / START
FAN
SLEEP TIMER
STOP
TIMER SELECTOR
ON TIMER
SILENT
LOW
MED
HI
FAN SPEED
SUPER SILENT
AUTO SWING

– 7 –
COOLING OPERATION
Use the device for cooling when the outdoor temperature is 21-43°C.
If indoor humidity is very high (over 80%), some dew may form on the air outlet grille of the indoor unit.
Press the button so that the display indicates
(COOL).
Cooling operation starts with a beep.
The cooling function does not start if the temperature setting is
higher than the current room temperature (even though the
(OPERATION) lamp lights). The cooling function will start as
soon as you set the temperature below the current room
temperature.
Set the desired FAN SPEED with the (FAN SPEED) button
(the display indicates the setting).
(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.
(SILENT) : Fan speed ultra slower.
Set the desired room temperature with the TEMPERATURE
button (the display indicates the setting).
The range of 25-28°C is recommended as the
room temperature for cooling.
If the temperature setting is 27°C, the room
temperature will be controlled at around 27°C.
The temperature setting and the actual room temperature may
vary somewhat depending on conditions.
Press the (STOP) button to stop operation.
1
■As the settings are stored in memory in the remote controller, you only
have to press the (COOLING) button next time.
2
STOP
3

– 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.
■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.
■As the settings are stored in memory in the remote controller, you
only have to press the (DEHUMIDIFY) button next time.
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.
2
Press the (DEHUMIDIFY) button.
Dehumidifying operation starts with a beep.
The FAN SPEED is set at SILENT or LOW automatically.
The FAN SPEED button can be used to change between
SILENT and LOW only.
1
Press the (STOP) button to stop operation.
STOP

– 9 –
SUPER SILENT
Press the button.
●Operation start with a signal received sound “beep”.
●Unit will be forced to operate in cooling mode and indoor
fan speed will be changed to SILENT.
1
CANCELLATION of SUPER SILENT Operation
Cancel Condition Operation mode after cancel
Press button.
Sleeping timer time is up Stop operation
Press SPEED COOL button SPEED COOL operation
Press button Next fan speed operation
NOTE:
Under SUPER SILENT operation and quiet environment, phenomena like flowing noise of refrigerant in
the refrigerating cycle may occur, but this is normal for the operation.

– 10 –
CIRCULATION OPERATION
Press the button so that the display indicates
(CIRCULATE).
Circulating operation starts with a beep.
Press the FAN SPEED button and select the desired FAN
SPEED (the display indicates your choice).
Press the temperature control button to set to the desired
temperature.
■As the settings are stored in memory in the remote controller,
you only have to press the (CIRCULATION) button next time.
1
3
Press the (STOP) button to stop operation.
STOP
2
■Circulation Function
●During circulation operation, compressor will not be running and there is no cooling operation with only
indoor fan running.
●When the setting temperature is higher than room temperature, indoor fan will stop running.

– 11 –
■During operations (only for COOLING, DEHUMIDIFYING, CIRCULATION) in any
fan speed (AUTO, HI, MED, LOW and SILENT), press the button to increase
fan speed and change horizontal deflector angle to improve the amenity
sensation (subject to customer preferences).
■It will return to their original settings after 3 hrs of operations.
■Press the (SPEED COOL) button again to cancel speed cool operation.
SPEED COOL
When pressed SPEED
COOL button
Selected FAN
SPEED
Default
Angle θFAN SPEED Angle θ
(HI)
COOLING
OPERATION (MED)
(LOW)
(SILENT)
(AUTO)
(LOW)
(SILENT)
(HI)
(MED)
(LOW)
(SILENT)
(AUTO)
DEHUMIDIFYING
OPERATION
SUPER HI
SUPER HI
SUPER HI
SUPER HI
SUPER HI
LOW
LOW
HI
HI
HI
HI
HI
55°
60°
CIRCULATION
OPERATION
10°
35°
35°
35°
θ= Horizontal Deflector
Angle.
●During circulation operation, compressor will not be running and there is no cooling
operation with only indoor fan running.
●When the setting temperature is higher than room temperature, indoor fan will stop
running. At this time, by pressing “SPEED COOL” button, fan will remain stop.

– 12 –
HOW TO SET THE SLEEP TIMER
Press the (SLEEP) button, and the display changes as shown below.
Mode
Sleep
timer
444
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.
SLEEP
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.
●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
4
Indication
1 hr 2 hrs 3 hrs 10 hrs 11 hrs 12 hrs
Sleep timer off
44

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HOW TO SET THE TIMER
ON TIME setting
●Select the ON TIMER by pressing the (ON)
Button.
●Setting time will change according to the below
sequence.
ON Timer Reservation
1 2 3 9 10 11 12
1 hour interval
(CANCEL OFF TIMER)
■Operation will start for setting
temperature at setting time (The starting
time may different depend on the room
temperature and set temperature).

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AIR FLOW LOUVERS ADJUSTMENTS
Vertical
about 15
about 60
When cooling,
dehumidifying
1
2
Adjustment 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.
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.

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HOW TO EXCHANGE THE BATTERIES IN THE REMOTE CONTROLLER
1
Remove the cover as shown in the figure and
take out the old batteries.
=
2
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.
3. Use high quality and high performance AAA batteries to
avoid short operating life and electrolyte leakages
CAUTION
!
When using the remote control, if there is no response from the air conditioner unit and or the remote control
has fading and dim displays, the batteries in the remote control device need to be removed and replaced
with new ones

– 16 –
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 IDEAL WAYS OF OPERATION

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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.
!
Inverter-type
fluorescent
lamp.
To prevent
interference,
place at least
1m away.
TV

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ATTACHING THE AIR CLEANSING FILTERS
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-CFH20>. 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.
!
!
Claws
(4 places)

– 19 –
MAINTENANCE
Cleaning and maintenance must be carried out only by qualified service personal.
Before cleaning, stop operation and switch off the power supply.
1. AIR FILTER
Clean the air filter, as it removes dust inside the room. In case the air filter is full of dust, the air flow
will decrease and the cooling capacity will be reduced. Further, noise may occur. Be sure to clean the
filter following the procedure below.
CAUTION
1Open the front panel and remove the filter
●Gently lift and remove the air cleansing filter
from the air filter frame.
2Vacuum dust from the air filter and air cleansing
filter using vacuum cleaner. If there is
too much dust, air filter only rinse under running
tap water and gently brush it with soft bristle
brush. Allow filters to dry in shade.
3●Re-insert the air cleansing filter to the filter
frame. Set the filter with “FRONT” mark fac-
ing front, and slot them into the original state.
●After attaching the filters, push the front panel
at three arrow portions as shown in figure
and close it.
CAUTION
●Do not wash with hot water at more than 40°C. The filter may shrink.
●When washing it, shake off moisture completely and dry it in the shade; do not expose it directly to
the sun. The filter may shrink.
●Do not use detergent on the air cleansing filter as some detergent may deteriorate the filter
electrostatic performance.
PROCEDURE
NOTE:
●Air cleansing filter should be cleaned every month or sooner if noticeable loading occurs. When used
overtime, it may loose its deodorizing function. For maximum performance, it is recommended to
replace it every 1 year depending on application requirements.
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2. CLEANING OF FRONT PANEL
●Wipe it with a soft dry cloth.
●When it is excessively dirty, wipe with a soft cloth
soaked in lukewarm water or neutral detergent.
Then wipe thoroughly with a soft dry cloth.
●Wipe the remote controller thoroughly with a soft
dry cloth.
CAUTION
●Never use hot water (above 40°C), benzine, gasoline, acid, thinner
or a brush, because they will damage the plastic surface and the
coating.
Removing the Front Panel
●When the front panel is fully opened with
both hands, push the right arm to the inside
to release it, and while closing the front panel
slightly, pull it out forward.
Attaching the Front Panel
●Move the projections of the left and right
arms into the Flanges in the unit and
securely insert them into the holes.
!
Projection
Flange
Hole