Hitachi RAI-50NH5A User manual

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ENGLISH
CEILING CASSETTE TYPE AIR CONDITIONER
INDOOR UNIT/OUTDOOR UNIT
MODEL
RAI-25NH5A
RAI-35NH5A
RAI-50NH5A
INDOOR UNIT
RAI-25NH5A
RAI-35NH5A
RAI-50NH5A
DEUTSCH
FRANÇAIS
ITALIANO
ESPAÑOL
PORTUGUÊS
∂ÏÏËÓÈο
РУССКИЙ
(EN1) RAI-25/35/50NH5A 5/3/08, 10:08 AM1

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INDOOR UNIT
NAMES AND FUNCTIONS OF EACH PART
WIDTH (mm)
580
MODEL
RAI-25NH5A, 35NH5A, 50NH5A
HEIGHT (mm)
285
DEPTH (mm)
580
MODEL NAME AND DIMENSIONS
AIR FILTER
To prevent dust from coming into the indoor unit.
(Refer Instruction Manual)
INDOOR UNIT INDICATORS
Light indicator showing the operating condition.
(Refer page 3)
SUCTION GRILL (AIR INLET)
HORIZONTAL DEFLECTOR (AIR OUTLET)
(Refer Instruction Manual)
REMOTE CONTROL
Send out operation signal to the indoor unit. So as to
operate the whole unit.
(Refer Instruction Manual)
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:
●Recommended to replace the air cleaning filter after every 3 months for normal usage. Type number for this air
cleaning filter is <SPX-CFH5>. Please use this number for ordering when you want to renew it.
NOTE
(EN1) RAI-25/35/50NH5A 5/3/08, 10:08 AM2

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ENGLISH
INDOOR UNIT INDICATORS
OPERATION LAMP
This lamp lights during operation.
The OPERATION LAMP flashes in the following
cases during heating.
(1) During preheating
For about 2–3 minutes after starting up.
(2) During defrosting
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.
TIMER LAMP
This lamp lights when the timer is working.
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”.
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 will be done in automatic
mode.
OPERATION INDICATOR
TEMPORARY
SWITCH
Press
Temporary Switch
about 5.5mm
Non-
conducted
stick
(EN1) RAI-25/35/50NH5A 5/3/08, 10:08 AM3

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MEMO
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Minimum Maximum Minimum Maximum
Indoor Dry bulb °C 21 32 20 27
Wet bulb °C 15 23 12 19
Outdoor Dry bulb °C 21 43 2 21
Wet bulb °C 15 26 1 15
Note
●Avoid to use the room air conditioner for cooling operation when the outside temperature is below
21°C (70°F).
The recommended maximum and minimum operating temperatures of the hot and cold sides
should be as below:
Cooling Heating
(EN1) RAI-25/35/50NH5A 5/3/08, 10:08 AM4

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ENGLISH
SPLIT TYPE
Instruction manual
Instruction manual Page 1~24
To obtain the best performance and ensure years of trouble free use, please read this instruction manual completely.
(EN) Inst Manual 1642 5/3/08, 10:22 AM1

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!
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
!
!
PRECAUTIONS DURING OPERATION
●Avoid an extended period of direct air flow for your health.
W
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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.
W
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!
(EN) Inst Manual 1642 5/3/08, 10:22 AM2

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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 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.
●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
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●The product shall be operated under the manufacturer specification and
not for any other intended use.
(EN) Inst Manual 1642 5/3/08, 10:22 AM3

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SILENT
LOW
MED
HI
AUTO
HEAT
DEHUMIDIFY
COOL
FAN
FAN SPEED
SLEEPING
STOP (CANCEL)
START (RESER VE)
START/STOP
TIME
TIMER SET
TIMER SELECT OR
ON TIMER
OFF TIMER
AUTO SWING
NAMES AND FUNCTIONS OF REMOTE CONTROL UNIT
●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 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 buttons
●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
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) (This button allows selecting the optimal or preferred fan speed
for each operation mode).
●AUTO SWING button
Controls the angle of the horizontal air deflector.
●TIMER control
Use this button to set the timer.
●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.
●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.
REMOTE CONTROLLER
●Operate by pointing towards the signal receptor on the indoor unit. The range of control is
about 7 meters. Signal receivable angle range is approximately 70°. However, if there is an
electronic light sensor device (inverter) in the room, signal may not be received or receivable
distance may become shorter.
●Indoor unit must be install 1 meter or more away from lighting.
●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.
▲
▲
Approximately 70°
(EN) Inst Manual 1642 5/3/08, 10:22 AM4

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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. However the mode of operation will
not change when indoor unit connected to multi type outdoor unit.
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 or OFF by remote control.
2. Auto Restart Control is not available when Timer or Sleep Timer mode is set.
■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.
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.
●The display does not indicate the preset temperature in the AUTO mode.
If you change the setting, the indoor unit will produce a beep.
1
START
STOP
°C
Press the (FAN SPEED) button, AUTO, LOW and SILENT is available.
(EN) Inst Manual 1642 5/3/08, 10:22 AM5

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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 changes automatically
according to the temperature of the air which
blows out.
(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
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
■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.
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.
However, if it is connected to multi type outdoor unit, the maximum time for defrosting is 15 minutes.
(If the piping length used is longer than usual, frost will likely to form.)
(EN) Inst Manual 1642 5/3/08, 10:22 AM6