Hitachi SJ Series User manual

OPERATION
MANUAL
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Instruction manual Page 1~26
To obtain the best performance, please read this instruction manual completely.
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RAK-SJ24HNK
<A>
RAR-M0B8

– 2 –
SAFETY PRECAUTION
●Please read the “Safety Precaution” carefully before operating the unit to ensure correct usage of the unit.
●To prevent personal injury or property damage, read this section carefully before you use this product, and be sure to
comply with the following safety precautions. Incorrect operation due to failure to follow the instructions may cause harm or
damage, the seriousness of which is classified as follows:
●Please keep this manual after reading.
This mark denotes an action that is PROHIBITED.
This mark denotes an action that is COMPULSORY.
WARNING CAUTION
This mark warns of death or serious injury. This mark warns of injury or damage to property.
! !
WARNING
W
A
R
N
I
N
G
C
A
U
T
I
O
N
!
!
●Please use ground wiring.
Connect the power supply and the ground wiring to the terminals in the electrical box.
Ground wiring must be securely connected.
Use a GFCI (Ground Fault Circuit Interrupter).
Failure to use a GFCI can result in electric shock or fire.
●Be sure to use the specified piping set for R410A. Otherwise, this may result in broken copper pipes
or faults.
●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.
●Do not use any conductor as fuse wire, this could cause fatal accident.
●During thunder storm, disconnect and turn off the circuit breaker.
●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.
●Spray cans and other combustibles should not be located within a meter 3.28ft(1m) 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.
CAUTION
●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 a smooth flow of condensate when installing the condensate hose.
●Do not install the indoor unit in a machine shop or kitchen where vapor from oil or its mist flows to the
indoor unit. The oil will deposit on the heat exchanger, thereby reducing the indoor unit performance
and may deform and in the worst case, break the plastic parts of the indoor unit.

– 3 –
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 insufficient oxygen.
●Do not direct the cool air coming out from the air-conditioner panel to face
household heating apparatus as this may affect the working of apparatus
such as the electric kettle, oven etc.
●Do not use any aerosol or hair sprays near the indoor unit. This chemical
can adhere on heat exchanger fin and block the flow of condensate to the
condensate pan. Condensate might drip on the fan and cause droplets to
occasionally drip from the indoor unit.
●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 louver facing down or moving automatically for a long period of time,
condensate will condense on the louver 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 can be used by children aged from 8 years and above and persons with reduced
physical, sensory or mental capabilities or lack of experience and knowledge if they have been
given supervision or instruction concerning use of the appliance in a safe way and understand
the hazards involved.
Children shall not play with the appliance. Cleaning and user maintenance shall not be made
by children without supervision.
●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
●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 cause a short circuit.
.
●Do not place plants directly under the air flow as it is bad for the plants.
!
●The product shall be operated under the manufacturer specification and
not for any other intended use.

– 4 –
INDOOR UNIT
NAMES AND FUNCTIONS OF EACH PART
Pre-filter
To prevent dust from coming into the indoor unit.
Front panel
Indoor unit indicators
LED light shows the operating mode.
Horizontal deflector ●Vertical deflector
(Air Outlet)
Remote controller
Send out operation signal to the indoor unit. So as to
operate the whole unit.
Please refer to the Remote Manual provided for
functions and operation details.
WIDTH (mm)
1100
MODEL
RAK-SJ24HNK
HEIGHT (mm)
300
DEPTH (mm)
260
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 automatic 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
OPERATION LED
This LED lights during operation.
The OPERATION LED flashes/dimming in the following
cases during heating.
(1) During preheating
For about 2–3 minutes after starting up.
(2) During defrosting
Defrosting is performed about once every one hour
when frost forms on the heat exchanger of the outdoor
unit, for 5–10 minutes each time.
TIMER LED
This LED lights up when the timer is working.
FROST WASH LED
This LED lights when the Frost Wash function is in operation.
If the auto Frost Wash function is canceled and operation
is stopped, when the device is operated for a total of about
42 hours, the Frost Wash LED blinks to indicate that it is
time to operate the manual Frost Wash function.
(not applicable for Multi split connection)

– 6 –
Suitable Room Temperature Install curtain or blinds
Ventilation
Effective Usage Of Timer
Do Not Forget To Clean The Pre-Filter
Please Adjust Suitable Temperature
For Baby And Children
Warning
Freezing temperature is bad for health
and a waste of electric power.
!
It is possible to reduce
heat entering the room
through windows.
At night, please use the “OFF or ON timer or
SLEEP 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
FOR USER’S INFORMATION
The Air Conditioner And The Heat Source In The Room
Not Operating For A Long Time
When Lightning Occurs
Interference From Electrical Products
!
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 3W 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.
!
Caution
To avoid noise interference, please place the indoor unit and its remote
controller at least 1m away from electrical products.

– 7 –
CAUTION
NOTE
!
1
2
3
4
ATTACHING THE AIR PURIFYING FILTERS
Open the front panel
●Pull up the front panel by holding it at both sides with
both hands.
Remove the Pre-filter
●Push upward to release the clasps and pull out the
Pre-filter.
Attaching the air purifying filters
●Attach the air purifying filters to the frame by gently
compress its both sides and release after insertion
into Pre-filter frame.
Attach the Pre-filters
●Attach the Pre-filters by ensuring that the surface
written “FRONT” is facing front.
●After attaching the Pre-filters, push the front panel at
three arrow portions as shown in figure and close it.
Do not bend the air purifying
filter as it may cause damage to
the structure.
Please do not smell direct from
source of filter.
●In case of removing the air purifying filters, please follow the above procedures.
●The cooling capacity is slightly weakened and the cooling speed becomes slower when the air purifying
filters are used. So, set the fan speed to "HIGH" when using it in this condition.
●The air purifying filters are not washable. It is recommended to use vacuum to clean. It can be used
for 1 year. Type number for this air purifying filter is <SPX-CFH22PM25>. Please use this number for
ordering when you want to renew it. Part can be purchased from an authorized service parts centers.

– 8 –
MAINTENANCE
Cleaning and maintenance must be carried out only by qualified service personnel. Before cleaning, stop
operation and switch off the power supply.
CAUTION
CAUTION
!
!
1
2
3
1. PRE-FILTER
Please clean the Pre-filter once about every two weeks. By doing so, the power rates are saved. In case
the Pre-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 Pre-filter following the procedure below.
Open the front panel and remove the Pre-filter
●Gently lift and remove the air purifying filters
from the air purifying filter frame.
Vacuum dust from the Pre-filter and air purifying
filter using vacuum cleaner. If there is too much
dust, wipe the filter with wet clotch or sponge.
Allow filters to dry in shade.
●Re-insert the air purifying filter to the filter frame.
Set the Pre-filter with “FRONT” mark facing front,
and slot them into the original state.
●After attaching the Pre-filters, push the front
panel at three arrow portions as shown in
figure and close it.
●Do not operate the air conditioner without Pre-filter. Dust may enter the air conditioner and fault may
occur.
●Do not wash with hot water at more than 104°F(40°C). The Pre-filters may shrink.
●When washing it, shake off moisture completely and dry it in the shade; do not expose it directly to the
sun. The Pre-filters may shrink.
●Do not use detergent on the Pre-filter as some detergent may deteriorate the Pre-filter electrostatic
performance.
NOTE:
●Air purifying filter should be cleaned every month or sooner if noticeable loading occurs. When used
overtime, it may lose its deodorizing function. For maximum performance, it is recommended to replace
it every 1 year depending on application requirements.

– 9 –
WIRING ARRANGEMENT
Cleaning and maintenance must be carried out only by qualified service personnel. Before
cleaning, stop operation and switch off the power supply.
!
CAUTION
CAUTION
●Please use ground wiring.
Do not place the ground wiring near water or gas pipes, lightning-conductor, or the ground
wiring of telephone. Improper installation of ground wiring 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.
IMPORTANT
The wires in this mains lead are coloured in accordance with the following code:
Green-and-yellow : Earth/Ground
White : Neutral
Black : Line
As the colours of the wires in the mains lead of this appliance may not correspond with the coloured markings
identifying the terminals in your plug, proceed as follows:
The wire which is coloured green-and-yellow must be connected to the terminal in the plug which is marked with
the letter E or by the earth symbol or coloured green or green-and-yellow.
The wire which is coloured white must be connected to the terminal which is marked with the letter N or coloured
black.
The wire which is coloured black must be connected to the terminal which is marked with the letter L or coloured
red.
NOTE
If the supply cord is damaged, it must be replaced with the new cord obtainable at authorized service parts centers.
!
2. CLEANING OF FRONT PANEL
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 Attaching the Front Panel
!
●Remove the front panel and wash with clean water.
Wash it with a soft sponge.
After using mild detergent, wash thoroughly with clean water.
●When front panel is not removed, wipe it with a soft dry cloth.
Wipe the remote controller thoroughly with a soft dry cloth.
●Wipe the water thoroughly.
If water remains at LEDs or signal receiver of indoor unit, it
causes trouble.
Method of removing the front panel.
Be sure to hold the front panel with both hands to detach
and reattach it.
●When the front panel is fully opened with both
hands, push the right arm to the outside to release
it, and while closing the front panel slightly, pull it out
forward.
●Move the projections of the left and right arms
into the Flanges in the unit and securely insert
them into the holes.

– 10 –
REGULAR INSPECTION
PLEASE CHECK THE FOLLOWING POINTS
BY QUALIFIED SERVICE PERSONNEL
EITHER EVERY HALF YEARLY OR YEARLY.
CONTACT YOUR SALES AGENT OR SERVICE
SHOP.
1
2
Is the earth line disconnected
or broken?
Is the mounting frame seriously
affected by rust and is the
outdoor unit tilted or unstable?
Notes
●In quiet or stop operation, the
following phenomena may
occassionally occur, but they are
not abnormal for the operation.
(1) Slight flowing noise of
refrigerant in the refrigerating
cycle.
(2) Slight rubbing noise from the fan casing which
is cooled and then gradually warmed as
operation stops.
●The odor will possibly be emitted from the room
air conditioner because the various odor, emitted
by smoke, foodstuffs, cosmetics and so on, sticks
to it. So the air filter and the evaporator regularly
must be cleaned to reduce the odor.
●Please contact your sales agent immediately if the
air conditioner still fails to operate normally after the
above inspections. Inform your agent for the model of
your unit, serial number, date of installation. Please
also inform him regarding the fault.
●Power supply shall be connected at the rated voltage,
otherwise the unit will be broken or could not reach
the specified capacity.
Note
●Avoid using the room air conditioner for cooling
operation when the outside temperature is below
the minimum recommended temperature.
The recommended maximum and minimum
operating temperatures of the hot and cold sides
should be as below:
When it does not operate
When it does not cool well
When it does not hot well
If the remote controller is
not transmitting a signal.
Remote controller
display is dim or blank.)
WHEN ASKING FOR SERVICE, CHECK
THE FOLLOWING POINTS
●Do the batteries need
replacement?
●Is the polarity of the
inserted batteries correct?
CONDITION CHECK THE
FOLLOWING POINTS
●Is the fuse blown?
●Is the power supply in
normal condition?
●Is the circuit breaker “ON”?
●Is the setting of operation
mode different from other
indoor units?
●Is the pre-filter blocked with
dust?
●Does sunlight fall directly
on the outdoor unit?
●Is the airflow of the outdoor
unit obstructed?
●Are the doors or windows
opened, or is there any
source of heat in the room?
●Is the set temperature
suitable?
●Are the air inlets or air
outlets of indoor and
outdoor units blocked?
●Is the fan speed “LOW” or
“SILENT”?
NOTE:
●If the supply cord is damaged, it must be
replaced by the special cord obtainable at
authorized service parts centers.
●On switching on the equipment, particularly
when the room light is dimmed, a slight
brightness fluctuation may occur. This is of no
consequence.
The conditions of the local Power Supply
Companies are to be observed.
Minimum Maximum
Indoor Dry bulb °C 70°F (21°C) 90°F (32°C)
Wet bulb °C 59°F (15°C) 73°F (23°C)
Outdoor Dry bulb °C 14°F (-10°C) 114.8°F (46°C)
Wet bulb °C – –
Minimum Maximum
Indoor Dry bulb °C 68°F (20°C) 81°F (27°C)
Wet bulb °C – –
Outdoor Dry bulb °C -4°F (- 20°C) 75.2°F (24°C)
Wet bulb °C – –
Cooling
Heating