Hitachi RAD-18NHA2 User manual

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SPLIT TYPE AIR CONDITIONER
INDOOR UNIT
INDOOR UNIT
MODEL
RAD-18NHA2
RAD-25NHA2
RAD-35NHA2
RAD-50NHA2
RAD-18NHA2
RAD-25NHA2
RAD-35NHA2
RAD-50NHA2
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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.
● 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.
● 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, breake the plastic parts
of the indoor unit.
CAUTION
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PRECAUTIONS DURING SHIFTING OR MAINTENANCE
PRECAUTIONS DURING OPERATION
●Avoid an extended period of direct air flow for your health.
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● 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.
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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 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.
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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.
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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:
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INDOOR UNIT
NAMES AND FUNCTIONS OF EACH PART
WIDTH (mm)
750
MODEL
RAD-18NHA2/RAD-25NHA2/RAD-35NHA2/RAD-50NHA2
HEIGHT (mm)
235
DEPTH (mm)
400
MODEL NAME AND DIMENSIONS
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NAMES AND FUNCTIONS OF REMOTE CONTROLLER
■This controls the operation function and timer setting of the room air conditioner.
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 MODE SELECTOR button during operation, the device may stop for about 3 minutes
for protection.
OPERATION LAMP
START/STOP Button
Press this button to start operation.
Press it again to stop operation.
Transmission Sign
The transmission sign blinks
when a signal has been
send.
RESET SWITCH
ROOM TEMPERATURE
Setting Button
Room temperature setting.
Value will change quicker
when keep pressing.
CANCEL Button
Cancel timer reservation.
FAN SPEED Button
This determines the fan
speed. Every time you press
this button, the intensity of
circulation will change from
(AUTO) to (HIGH)
to (MED) to (LOW)
to (SILENT)(This button
allows selecting the optimal
or preferred fan speed for
each operation mode).
MODE SELECTOR Button
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.
SLEEP Button
Use this button to set the sleep
timer. ( Page 13)
SET Button
Timer setting reservation.
OFF TIMER Button
Select the turn OFF timer.
ON TIMER Button
Select the turn ON timer.
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AUTOMATIC OPERATION
The device will automatically determine the mode of operation, HEAT or COOL depending on the current
room temperature. The selected mode of operation will change when the room temperature varies.
■As the settings are stored in the memory in the remote controller,
you only have to press the (START/STOP) button next time.
Press the MODE selector button 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 or COOL depending
on the current room temperature. However the mode of
operation will not change when indoor unit is connected
to multi type outdoor unit.
●If the mode automatically selected by the unit is not
satisfactory, manually change the mode setting (HEAT,
DEHUMIDIFY or COOL).
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.
2. Auto Restart Control is not available when Timer or Sleep Timer mode is set.
Press the (FAN SPEED) button to select AUTO, HIGH, MED,
LOW or SILENT.
Press the (START/STOP) button.
Operation starts.
Press the button again to stop operation.
2
Set the desired FAN SPEED with the (FAN SPEED) button (the
display indicates the setting).
(AUTO) (HIGH) (MED)
(SILENT) (LOW)
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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 maintain reliability of the device, please use this device when outdoor temperature is above
–15°C
Press the MODE SELECTOR button so that the display indicates
(HEAT).
Set the desired FAN SPEED with the (FAN SPEED) button
(the display indicates the setting).
Set the desired room temperature with the ROOM TEMPERATURE
setting button (the display indicates the setting).
The temperature setting and the actual room temperature may
vary depending on conditions.
Press the (START/STOP) button. Heating operation starts.
Press the button again to stop operation.
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2
3
START
STOP
(AUTO) (HIGH) (MED)
(SILENT) (LOW)
■As the settings are stored in the memory of the remote controller, you
only have to press the (START/STOP) button next time.
■During AUTO fan, the fan speed automatically changes as below:
● When the difference between room temperature and setting temperature
is large, fan starts to run at HI speed.
● After room temperature reaches the preset temperature, fan speed
will be changed to lower speed to obtain optimum room temperature
condition for natural healthy heating.
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 a cycle of 3 seconds on and 0.5 second off.
The maximum time for defrosting is 20 minutes.
However, if the indoor unit 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 is likely to form.)
Defrosting
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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.
Set the desired room temperature with the ROOM TEMPERATURE
setting 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. Press the button again to stop operation.
■As the settings are stored in the memory in the remote controller, you
only have to press the (START/STOP) button next time.
START
STOP
Press the MODE SELECTOR button so that the display indicates
(DEHUMIDIFY).
Press (FAN SPEED) button to select SILENT or LOW fan
speed.
■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 preset room temperature may not be reached depending on the number of people present in the room
or other room conditions.
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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 MODE SELECTOR button so that the display indicates
(COOL).
Set the desired FAN SPEED with the (FAN SPEED) button
(the display indicates the setting).
Set the desired room temperature with the ROOM TEMPERATURE
setting button (the display indicates the setting).
The temperature setting and the actual room temperature may
vary depending on conditions.
Press the (START/STOP) button. Cooling operation starts.
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.
START
STOP
(AUTO) (HIGH) (MED)
(SILENT) (LOW)
■ As the settings are stored in the memory of the remote controller, you
only have to press the (START/STOP) button next time.
■ During AUTO fan, the fan speed automatically changes as below:
●When the difference between room temperature and setting
temperature is large, fan starts to run at HI speed.
● After room temperature reaches the preset temperature, fan speed
will be changed to lower speed to obtain optimum room temperature
condition for natural healthy cooling.
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