Hitachi RAI-35RPA User manual

CEILING CASSETTE TYPE AIR CONDITIONER
INDOOR UNIT
RAI-25RPA
RAI-35RPA
RAI-50RPA
INDOOR UNIT
MODEL
RAI-25RPA
RAI-35RPA
RAI-50RPA
RAI-25RPA-UM-EN1 1 3/11/13 2:43 PM

– 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.
Make sure to connect earth line. The sign in the gure indicates prohibition.
Indicates the instructions that must be followed.
● Please keep this manual after reading.
PRECAUTIONS DURING OPERATION
● Avoid an extended period of direct air ow for your health.
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● Do not insert a nger, 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.
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 re 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 re.
●Please contact your agent if you need to remove and reinstall the unit. Electric shock or re
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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●During thunder storm, disconnect and turn off the circuit breaker.
WARNING
PRECAUTIONS DURING INSTALLATION
●Do not reconstruct the unit.
Water leakage, fault, short circuit or re may occur if you reconstruct the unit by yourself.
●Please ask your sales agent or qualied technician for the installation of your unit. Water
leakage, short circuit or re 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 specied 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 ammable gas. The outdoor unit may catch
re if ammable gas leaks around it.
●Please ensure smooth ow of water when installing the drain hose.
CAUTION
!
!
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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 insufciency.
●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 n and blocked the evaporation water ow
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, rm 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 deector facing down or moving automatically for a long period of time,
water will condense on the air deector 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 inrm 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 specication and
not for any other intended use.
!
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– 4 –
INDOOR UNIT
NAMES AND FUNCTIONS OF EACH PART
AIR FILTER
To prevent dust from coming into the indoor unit.
(Refer page 9)
INDOOR UNIT INDICATORS
Light indicator showing the operating condition.
(Refer page 5)
SUCTION GRILL (AIR INLET)
HORIZONTAL DEFLECTOR (AIR OUTLET)
REMOTE CONTROL
Send out operation signal to the indoor unit. So as to operate
the whole unit.
(Refer Remote Controller Manual)
●Recommended to replace the air cleaning lter after every 3 months for normal usage. Type number for this air
cleaning lter is <SPX-NTW1>. Please use this number for ordering when you want to renew it.
NOTE
WIDTH (mm)
580
MODEL
RAI-25RPA, 35RPA, 50RPA
HEIGHT (mm)
285
DEPTH (mm)
580
MODEL NAME AND DIMENSIONS
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.
MULTI-AIR CONDITIONER
Stopped Indoor Units:
When an indoor unit is operated in the cooling,
heating or dehumidifying mode in the room, the
sound of refrigerant ow 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.
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.
When operation mode is selected:
During automatic operation:
Combination of Operations:
●You cannot operate the indoor units in the
following combinations.
●The indoor unit which is switched on rst 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 rst or later and reset
the type of operation, then perform operation again.
●When heating operation is automatically selected for the rst indoor unit, the next indoor unit will then start to heat.
Also, if cooling or dehumidifying is automatically selected for the rst indoor unit, the next indoor unit will also start
to cool or dehumidify.
Other unit
Cooling
Dehumidifying
Circulating (fan)
One unit
Heating
RAI-25RPA-UM-EN2 4 3/11/13 2:44 PM

– 2 –
PREPARATION BEFORE OPERATION
1. Slide the cover to take it off.
2. Install two dry batteries AAA.LR03 (alkaline).
The direction of the batteries should match the
marks in the case.
1. Choose a place from where the signals can reach the unit.
2. Fix the remote controller holder to a wall, a pillar or similar
location with the provided screws.
3. Place the remote controller in the remote controller holder.
Remote controller
Screws
Remote controller holder
ƵTo install the batteries
3. Replace the cover at its original position.
ƵTo fix the remote controller holder to the wall
NOTE
Notes on batteries
ƽWhen replacing the batteries, use batteries of the same
type, and replace both old batteries together.
ƽWhen the system is not used for a long time, take the
batteries out.
ƽThe batteries will last for approximately 1 year. However, if
the remote controller display begins to fade and degradation
of reception performance occurs within a year, replace both
batteries with new size AAA.LR03 (alkaline).
ƽThe attached batteries are provided for the initial use of
the system.
The usable period of the batteries may be short depending
on the manufactured date of the air conditioner.
Notes on the remote controller
ƽNever expose the remote controller to direct sunlight.
ƽDust on the signal transmitter or receiver will reduce the
sensitivity. Wipe off dust with soft cloth.
ƽSignal communication may be disabled if an electronic-
starter-type uorescent lamp (such as inverter-type lamps)
is in the room. Consult the shop if that is the case.
ƽIf the remote controller signals happen to operate another
appliance, move that appliance to somewhere else, or
consult the service shop.
ƽWhen the remote controller is not in use, please close the
slide cover to prevent failure.

– 3 –
ENGLISH
PREPARATION BEFORE OPERATION
ƵTo set calendar and clock
1. Press (RESET) button when first time setting.
"Year" blinks.
2. Press (TIME) button to set the current year.
3. Press (CLOCK) button. Next, "Day" and
"Month" blink.
4. Press (TIME) button to set the current day and
month.
5. Press (CLOCK) button. Next, "CLOCK" blinks.
6. Press (TIME) button to set the clock to the current
time.
7. Press (CLOCK) button.
Calendar and clock are set.
To modify the calendar and clock, press (CLOCK)
button.
Then follow steps 1 to 7.
Calendar and clock shall be set again after changing
batteries.
After changing the batteries,
1. Press (RESET) button.
2. Direct remote control towards indoor unit and press
(INFO) button.
3. The calendar and clock from indoor unit will be transmitted.
ƵCalendar and clock will not be transmitted from indoor
unit when the following occurs:
ƽ When there is a power failure.
ƽ When breaker is OFF by user (unit is not in STANDBY
MODE).
NOTE
Note on setting the calendar and clock.
ƽIf the calendar and clock are not set, the ON-timer, OFF-timer and Weekly Timer cannot be set.
ƽIf the calendar and clock are not set correctly, the ON-timer, OFF-timer and Weekly Timer will not
operate correctly.
ƽWhen the ON-timer, OFF-timer and Weekly Timer are set, the calendar and clock cannot be changed. If
need to change the calendar and clock, ON-timer, OFF-timer and Weekly Timer need to be cancelled.

– 4 –
NAMES AND FUNCTIONS OF REMOTE CONTROLLER
REMOTE CONTROLLER
ƽThis controls the operation of the indoor unit. The range of control is about 7 meters. If indoor lighting is
controlled electronically, the range of controller 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.
ƽHandle the remote controller with care. Dropping it or getting it wet may compromise its signal transmission
capability.
ƽAfter new batteries are inserted into the remote controller, the unit will initially require approximately 10
seconds to respond to commands and operate.
ƽWhen remote controller is not in use for about 3 minutes during OFF condition, indicated by on the
display, the LCD will turn off.
ƽDuring clock setting, the LCD will turn off about 10 minutes later if the remote controller is not in use.
ƽWhen pressing any button, the LCD will turn on.
ƽThe LCD will not turn off during TIMER setting.
Signal Transmitting/Receiving
Window
Point this window towards the
indoor unit when controlling it.
Sensor
A temperature sensor inside the
remote controller senses ambient
temperature around the remote-
controller.
Display
ROOM TEMPERATURE setting Buttons
Press these buttons to set the room
temperature.
Press the [ ] button to raise the room
temperature.
Press the [ ] button to lower the room
temperature.
Keep pressing and the value will change
more quickly.
ECO Button
Use this button to set the ECO
START/STOP button
Press this button to start
operation. Press it again to stop
operation.
Transmission sign
The transmission sign lights up
when a signal is sent.
FAN SPEED selector Button
This determines the fan speed.
Every time you press this button
the ange from
(AUTO) (HIGH)
(MED) (LOW)
(SILENT) (This button allows
optimal or preferred
fan speed for each operation mode).
䇆
䇆
䇆
䇆
airflow rate will ch
selection of
This indicates the room temperature
selected, current time, timer status,
function and airflow rate selected.
mode.( p.14)

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ENGLISH
MODE SELECTOR
AUTO
HEAT
DEHUMIDIFY
COOL
FAN
FAN SPEED
AUTO
SILENT
LOW
MED
HI
START / STOP
ECO
Precautions for Use
ƽ
Do not put the remote controller in the following places.
ƽ
Under direct sunlight.
ƽ
In the vicinity of a heater.
ƽ
Handle the remote controller carefully. Do not drop it on the floor, and protect it from water.
ƽ
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.
ƽ
If you press the MODE selector button during operation, the device may stop for about 3 minutes for
protection.
POWERFUL Button
Use this button to set the
POWERFUL mode.
INFORMATION Button
ONE TOUCH CLEAN Button
ON / OFF TIMER setting Buttons
MODE selector Button
Use this button to select the
operating mode. Every time you
press this button, the mode will
change from (AUTO)
(HEAT) (DEHUMIDIFY)
(COOL) and (FAN)
cyclically.
SILENT Button
Use this button to set the SILENT
mode.
AUTO SWING (Vertical) Button
Controls the angle of the
horizontal air deflector.
WEEKLY TIMER setting Buttons
LEAVE HOME Button
NAMES AND FUNCTIONS OF REMOTE CONTROLLER
SLEEP TIMER Button
Use this button to set the sleep
timer.
FAN
POWERFUL
SILENT
INFO
SLEEP TIMER
AUTO SWING (VERTICAL)
LEAVE HOME
CLEAN
DAY
PROGRAM NO.
ON / OFF TIMER
TIME
OK
DELETE
COPY / PASTE
CANCEL
SEND
CLOCK
( p.12)
( p.26)
( p.16)
( p.15)
( p.17)
( p.18)
( p.13)
( p.20)
( p.11)

– 6 –
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.
However, the mode of operation will not change when indoor unit is connected to multi type outdoor unit.
VARIOUS FUNCTIONS
ƵAuto Restart Control
ƽIf 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.)
ƽIf 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 air flow direction.
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 MODE selector button so that the display indicates the
(AUTO) mode of operation.
ƽ 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.
ƽIf the mode automatically selected by the unit is not satisfactory,
manually change the mode setting (HEAT, DEHUMIDIFY, COOL
or FAN).
Press the (FAN SPEED) button to select AUTO, HI, MED, LOW or
SILENT.
Press the (START/STOP) button.
Operation starts with a beep.
Press the button again to stop operation.
Set the desired room temperature with the TEMPERATURE buttons
(the display indicates the setting).
The temperature setting and the actual room temperature may vary
depending on conditions.
START
STOP
1
3
2
Set the desired FAN SPEED with the (FAN SPEED) button (the
display indicates the setting).
(AUTO) (HIGH) (MED)
(LOW)
(SILENT)
ƵAs the settings are stored in the memory the remote controller, you
(START/STOP) button next time.only have to press the
of

– 7 –
ENGLISH
HEATING OPERATION
ƽUse 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.
ƽ
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 TEMPERATURE buttons
(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 with
a beep. Press the button again to stop operation.
Ƶ
ƵDuring AUTO fan, the fan speed automatically changes as below:
ƽWhen the difference between room temperature and setting temperature
is large, fan starts to run at HI speed.
ƽ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.
START
STOP
ƵDefrosting
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.
(If the piping length used is longer than usual, frost is likely to form.)
1
2
3
In order to maintain reliability of the device, please use this device when outdoor temperature is above -15°C.
(AUTO) (HIGH) (MED)
(LOW)
(SILENT)
ƵAs the settings are stored in the memory of the remote controller, you only
have to press the (START/STOP) button next time.
However, if the indoor unit is connected to multi type outdoor unit, the maximum time for defrosting is 15 minutes.