Hitachi RAM-36NP2A User manual

NO. 0530E
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
ROOM AIR CONDITIONER
INDOOR UNIT
DECEMBER 2012 Refrigeration & Air-Conditioning Division
SERVICE MANUAL
PM
REFER TO THE FOUNDATION MANUAL
TECHNICAL INFORMATION
FOR SERVICE PERSONNEL ONLY
(W)
(A)
(kW)
(B.T.U./h)
(W)
(A)
(kW)
(B.T.U./h)
W
H
D
(kg)
RAI-25RPA
DC INVERTER (CEILING CASSETTE TYPE)
TYPE
MODEL
POWER SOURCE
TOTAL INPUT
TOTAL AMPERES
CAPACITY
TOTAL INPUT
TOTAL AMPERES
CAPACITY
DIMENSIONS
(mm)
NET WEIGHT
SPECIFICATIONS
580
285
580
20
RAI-ECPP
RAI-25RPA
RAI-35RPA
RAI-50RPA
CONTENTS
SPECIFICATIONS---------------------------------------------------------------------4
HOW TO USE -------------------------------------------------------------------------6
CONSTRUCTION AND DIMENSIONAL DIAGRAM----------------------- 41
MAIN PARTS COMPONENT ---------------------------------------------------- 42
WIRING DIAGRAM ----------------------------------------------------------------- 43
CIRCUIT DIAGRAM ---------------------------------------------------------------- 45
BLOCK DIAGRAM ------------------------------------------------------------------ 49
BASIC MODE ------------------------------------------------------------------------ 51
REFRIGERATING CYCLE DIAGRAM----------------------------------------- 69
AUTO SWING FUNCTION ------------------------------------------------------- 71
DESCRIPTION OF MAIN CIRCUIT OPERATION------------------------- 72
SERVICE CALL Q & A------------------------------------------------------------ 76
TROUBLE SHOOTING ------------------------------------------------------------ 79
PARTS LIST AND DIAGRAM---------------------------------------------------- 91
RAI-25RPA
RAI-35RPA
RAI-50RPA
COOLING
HEATING
INDOOR UNIT
1 PHASE, 50 Hz, 220-240V
RAI-50RPA
NOTE:
This manual describes only points that differ from
RAK-18,25,35,50QXA (PM No 0527E)
RAD-18,25,35,50RPA (PM No 0531E)
and
RAM-36NP2A (PM No. 0522E)
RAM-53NP2A, RAM-53NP3A (PM No. 0523E)
RAM-68NP3A (PM No. 0524E)
RAM-70NP4A (PM No. 0525E)
RAM-90NP5A (PM No. 0528E)
RAM-130NP6A (PM No. 0529E)
for items not described in this manual.
REFER TO THE SPECIFICATIONS PAGE (5)
RAI-35RPA

SAFETY DURING REPAIR WORK
1. In order to disassemble and repair
the unit in question, be sure to
disconnect the power cord plug
from the power outlet before starting
the work.
2. If it is necessary to replace any parts, they should be replaced with respective genuine parts for the unit,
and the replacement must be effected in correct manner according to the instructions in the Service Manual
of the unit.
If the contacts of electrical
parts are defective, replace the
electrical parts without trying to
repair them.
3. After completion of repairs, the initial state
should be restored.
4. Lead wires should be connected and laid as
in the initial state.
5. Modification of the unit by user himself should
absolutely be prohibited.
6. Tools and measuring instruments for use in repairs or inspection should be accurately calibrated in advance.
7. In installing the unit having been repaired, be careful to prevent the occurence of any accident such as
electrical shock, leak of current, or bodily injury due to the drop of any part.
8. To check the insulation of the unit, measure the insulation resistance between the power cord plug and
grounding terminal of the unit. The insulation resistance should be 1M or more as measured by a 500V
DC megger.
9. The initial location of installation such as window, floor or the other should be checked for being and safe
enough to support the repaired unit again.
If it is found not so strong and safe, the unit should be installed at the initial location reinforced or at a new
location.
10. Any inflammable thing should never
be placed about the location of
installation.
11. Check the grounding to see whether
it is proper or not, and if it is found
improper, connect the grounding
terminal to the earth.
– i –

WORKING STANDARDS FOR PREVENTING BREAKAGE OF SEMICONDUCTORS
1. Scope
The standards provide for items to be generally observed in carrying and handling semiconductors in relative
manufacturers during maintenance and handling thereof. (They apply the same to handling of abnormal
goods such as rejected goods being returned).
2. Object parts
(1) Micro computer
(2) Integrated circuits (IC)
(3) Field-effect transistors (FET)
(4) P.C. boards or the like on which the parts mentioned in (1) and (2) of this paragraph are equipped.
3. Items to be observed in handling
(1) Use a conductive container for carrying and storing of parts. (Even rejected goods should be handled
in the same way).
Fig. 1. Conductive Container
(2) When any part is handled uncovered (in counting, packing and the like), the handling person must always
use himself as a body earth. (Make yourself a body earth by passing 1M earth resistance through a
ring or bracelet).
(3) Be careful not to touch the parts with your clothing when you hold a part even if a body earth is being
taken.
(4) Be sure to place a part on a metal plate with grounding.
(5) Be careful not to fail to turn off power when you repair the printed circuit board. At the same time, try
to repair the printed circuit board on a grounded metal plate.
1M
Fig. 2. Body Earth
Body earth
(Elimik conductive band)
Clip for connection with a
grounding wire
IC
A conductive polyvinyl bag IC
Conductive sponge
– 1 –

(6) Use a three wire type soldering iron including a grounding wire.
Bare copper wire (for body earth)
Working table
Resistor of 1 M (1/2W)
Earth wire
Fig. 3. Grounding of the working table
Screw stop at the screwed
part using a rag plate
Soldering iron
Grounding wire
Fig. 4. Grounding a soldering iron
Use a high insulation mode (100V, 10M or higher) when ordinary iron is to be used.
(7) In checking circuits for maintenance, inspection or some others, be careful not to have the test probes of
the measuring instrument shortcircuit a load circuit or the like.
Metal plate (of aluminium, stainless steel, etc.)
Staple
– 2 –

1. In quiet operation or stopping the running, slight flowing noise of refrigerant in the refrigerating cycle is
heard occasionally, but this noise is not abnormal for the operation.
2. When it thunders near by, it is recommend to stop the operation and to disconnect the power cord plug
from the power outlet for safety.
3. The room air conditioner does not start automatically after recovery of the electric power failure for
preventing fuse blowing. Re-press START/STOP button after 3 minutes from when unit stopped.
4. If the room air conditioner is stopped by adjusting thermostat, or missoperation, and re-start in a moment,
there is occasion that the cooling and heating operation does not start for 3 minutes, it is not abnormal
and this is the result of the operation of IC delay circuit. This IC delay circuit ensures that there is no
danger of blowing fuse or damaging parts even if operation is restarted accidentally.
5. This room air conditioner should not be used at the cooling operation when the outside temperature is
below 10°C (50°F).
6. This room air conditioner (the reverse cycle) should not be used when the outside temperature is below
–15°C (5°F).
If the reverse cycle is used under this condition, the outside heat exchanger is frosted and efficiency
falls.
7. When the outside heat exchanger is frosted, the frost is melted by operating the hot gas system, it is not
trouble that at this time fan stops and the vapour may rise from the outside heat exchanger.
!
CAUTION
– 3 –

SPECIFICATIONS
MODEL
FAN MOTOR
FAN MOTOR CAPACITOR
FAN MOTOR PROTECTOR
COMPRESSOR
COMPRESSOR MOTOR CAPACITOR
OVERLOAD PROTECTOR
OVERHEAT PROTECTOR
FUSE (for MICROPROCESSOR)
POWER RELAY
POWER SWITCH
TEMPORARY SWITCH
SERVICE SWITCH
TRANSFORMER
VARISTOR
NOISE SUPPRESSOR
THERMOSTAT
REMOTE CONTROL SWITCH (LIQUID CRYSTAL)
RAI-25RPA
RAI-35RPA
RAI-50RPA
WITHOUT REFRIGERANT BECAUSE
COUPLING IS FLARE TYPE.
UNIT
PIPES
REFRIGERANT CHARGING
VOLUME
(Refrigerant 410A)
– 4 –
25W
NO
NO
–
NO
NO
NO
NO
NO
NO
YES
NO
NO
NO
NO
YES(IC)
YES
----------

SPECIFICATION OF ROOM AIR CONDITIONER
– 5 –
RAI-25RPA, RAI-35RPA, RAI-50RPA
TYPE
MODEL
PHASE/VOLTAGE/FREQUENCY
AUTOMATIC AIR DEFLECTORS
FAN SPEED
LINE CORD
REMOTE CONTROL SWITCH
DIMENSION
inches (mm)
PACKING
inches (mm)
NET WEIGHT (kg)
GROSS WEIGHT (kg)
FLARE NUT SIZE (SMALL/LARGE)
COOLING
(ONE UNIT)
HEATING
(ONE UNIT)
INDOOR UNIT
SOUND LEVEL (INDOOR)
AIR FLOW VOLUME (Hi)
SOUND LEVEL (INDOOR)
AIR FLOW VOLUME (Hi)
W
H
D
(INSTALLED)
W
H
D
cu.ft
COOLING/HEATING
CEILING CASSETTE
RAI-25RPA RAI-35RPA RAI-50RPA
1ø 220~240V 50Hz
35 39 43
8.5 m3/min. 10.8 m3/min. 12.0 m3/min.
36 40 43
8.5 m3/min. 10.8 m3/min. 12.0 m3/min.
YES YES YES
444
NOT PROVIDED (POWER CORD SHOULD BE PREPARED AND
CONNECTED TO OUTDOOR UNIT WHEN INSTALLED)
YES (WIRELESS) YES (WIRELESS) YES (WIRELESS)
22-27/32 (580)
11-7/32 (285)
22-27/32 (580)
–
20
29-29/32 (760)
15-9/16 (395)
29-29/32 (760)
8.06
25
6.35/9.52 6.35/12.7

– 6 –
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 figure 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 flow for your health.
W
A
R
N
I
N
G
!
● 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.
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
A
R
N
I
N
G
!
●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 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
!
!

– 7 –
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
A
U
T
I
O
N
●The product shall be operated under the manufacturer specification and
not for any other intended use.
!

– 8 –
INDOOR UNIT
NAMES AND FUNCTIONS OF EACH PART
AIR FILTER
To prevent dust from coming into the indoor unit.
(Refer page 13)
INDOOR UNIT INDICATORS
Light indicator showing the operating condition.
(Refer page 9)
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 filter after every 3 months for normal usage. Type number for this air
cleaning filter 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 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.
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 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.
●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.
Other unit
Cooling
Dehumidifying
Circulating (fan)
One unit
Heating

– 9 –
INDOOR UNIT INDICATORS
OPERATION INDICATOR
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 one
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 is done in automatic
mode.
TEMPORARY
SWITCH
Temporary Switch
Press
Non-
conducted
stick
about 5.5mm

– 10 –
MEMO
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Note
●The recommended temperature range for safety testing should be as below:
Cooling Heating
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
CIRCUIT BREAKER
When you do not use the room air conditioner, set the circuit breaker to “OFF”.

– 11 –
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

– 12 –
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 12W
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.
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.
TV
To prevent
interference,
place at least
1m away.
!
!
OFF

– 13 –
MAINTENANCE
Cleaning and maintenance must be carried out by qualified service personnel.
Before the cleaning, stop operation and disconnect the power supply.
Clean the filter at least once every one month. This helps save electricity cost.
1. CLEANING OF AIR FILTER
CAUTION
1Remove the filter from indoor
●Press the mark “PUSH” on the left and
right sides of the suction grille.
●Pull out the filter from the grille.
2Remove dust from the filter using a vacuum
cleaner.
If there is too much dust, use neutral
detergent. After using neutral detergent, wash
with clean water and dry in the shade.
3Install the filter. (Set it with “UP SIDE” mark
facing front.)
Slot the filter to suction grille and close as
original state.
(Press the mark “PUSH” at the left and right
sides of the suction grille to fix it securely.)
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 operate the air conditioner with the filter removed. Dust may enter the air conditioner and
cause trouble.
REMOVAL AND ATTACHMENT OF AIR FILTER
Note:
●This model has an air cleaning filter. The cooling capacity is slightly weakened and the cooling
speed becomes slower when the air cleaning filter is used. So, set the fan speed to “HIGH” when
using it in this condition.
!
PROCEDURE
!

– 14 –
1
2
3
REGULAR INSPECTION
PLEASE CHECK THE FOLLOWING POINTS EITHER EVERY HALF YEARLY OR YEARLY.
CONTACT YOUR SALES AGENT SHOULD YOU NEED ANY HELP.
Is the earth line disconnected or broken?
WARNING
Coming off or breakage of grounding wire may cause malfunction
or electrical shock.
Is the mounting frame seriously affected by rust and is the outdoor
unit tilted or unstable?
WARNING
Outdoor unit may fall or drop if there is extreme rust on mounting
frame or outdoor unit is unstably installed. This may cause injury.
2. CLEANING OF FRONT PANEL
●Wipe it with a soft dry cloth.
●When it is excessively dirty, wipe with soft cloth soaked in lukewarm water or neutral detergent.
Then wipe thoroughly with a soft dry cloth.
CAUTION
●Do not splash or direct water to the body of the unit when cleaning it as
this may cause short circuit.
●Never use hot water (above 40°C), benzine, gasoline, acid, thinner or a
brush, because they will damage the plastic surface and the coating.
3. MAINTENANCE AT BEGINNING OF LONG OFF PERIOD
●Run the unit by setting the operation mode to (COOL), the
temperature to 32°C and the fan speed to HI for about half a
day on a fine day, and dry the whole of the unit.
●Turn off the circuit breaker.
Is the plug of power line firmly plugged into the socket?
(Please ensure no loose contact between them).
Air
Blow
Confirm
!
!
!

– 15 –
AFTER SALE SERVICE AND WARRANTY
WHEN ASKING FOR SERVICE, CHECK THE FOLLOWING POINTS.
When it does not operate
● Is the fuse all right?
● Is the voltage extremely high or low?
● Is the circuit breaker “ON”?
● Is the setting of operation mode different from other indoor units?
● Is the air filter blocked with dust?
● Does sunlight fall directly on the outdoor unit?
● Is the air flow 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”?
CONDITION CHECK THE FOLLOWING POINTS
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 of the model of your unit, production 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.
When it does not cool well
When it does not hot well
If the remote controller is
not transmitting a signal. ● Do the batteries need replacement?
● Is the polarity of the inserted batteries correct?
Remote controller
display is dim or blank.)
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.

– 16 –
PREPARATION BEFORE OPERATION
■To install the batteries
■To fix the remote controller holder to the wall
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.
3. Replace the cover at its original position.
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.
NOTE
Notes on batteries
●When replacing the batteries, use batteries of the same
type, and replace both old batteries together.
●When the system is not used for a long time, take the
batteries out.
● 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).
● 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
● Never expose the remote controller to direct sunlight.
● Dust on the signal transmitter or receiver will reduce the
sensitivity. Wipe off dust with soft cloth.
● Signal communication may be disabled if an electronic-
starter-type fluorescent lamp (such as inverter-type lamps)
is in the room. Consult the shop if that is the case.
●If the remote controller signals happen to operate another
appliance, move that appliance to somewhere else, or
consult the service shop.
●When the remote controller is not in use, please close the
slide cover to prevent failure.
Remote controller
Screws
Remote controller holder

– 17 –
PREPARATION BEFORE OPERATION
■To 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. "Day" and "Month"
blink.
4. Press (TIME) button to set the current day and
month.
5. Press (CLOCK) button. "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 need to be set again after changing
batteries.
After changing the batteries,
1. Press (RESET) button.
2. Direct remote controller towards indoor unit and press
(INFO) button.
3. The calendar and clock from indoor unit will be transmitted.
■Calendar and clock will not be transmitted from indoor
unit when the following occurs:
● When there is a power failure.
● When breaker is OFF by user (unit is not in STANDBY
MODE).
NOTE
Note on setting the calendar and clock.
●If the calendar and clock are not set, the ON-timer, OFF-timer and Weekly Timer cannot be set.
●If the calendar and clock are not set correctly, the ON-timer, OFF-timer and Weekly Timer will not
operate correctly.
●When the ON-timer, OFF-timer and Weekly Timer are set, the calendar and clock cannot be changed.
If there is a need to change the calendar and clock, ON-timer, OFF-timer and Weekly Timer need to
be cancelled.

– 18 –
NAMES AND FUNCTIONS OF REMOTE CONTROLLER
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.
●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.
●When remote controller is not in use for about 3 minutes during OFF condition, indicated by on the
display, the LCD will turn off.
●During clock setting, the LCD will turn off about 10 minutes later if the remote controller is not in use.
●When pressing any button, the LCD will turn on.
●The 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
This indicates the room temperature
selected, current time, timer status,
function and airflow rate selected.
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
mode. ( p. 27)
START/STOP button
Press this button to start
operation. Press it again to stop
operation.
FAN SPEED selector Button
This determines the fan speed.
Every time you press this button,
the airflow rate will change from
(AUTO) ➞(HIGH) ➞
(MED) ➞(LOW) ➞
(SILENT) (This button allows
selection of optimal or preferred fan
speed for each operation mode).
Transmission sign
The transmission sign lights up
when a signal is sent.