Hitachi RAC-18EH2 User manual

NO. 0482E
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
ROOM AIR CONDITIONER
INDOOR UNIT + OUTDOOR UNIT
FEBRUARY 2011 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)
RAS-18EH2
DC INVERTER (WALL TYPE)
TYPE
MODEL
POWER SOURCE
TOTAL INPUT
TOTAL AMPERES
CAPACITY
TOTAL INPUT
TOTAL AMPERES
CAPACITY
DIMENSIONS
(mm)
NET WEIGHT
SPECIFICATIONS
780
280
215
9.5
CONTENTS
SPECIFICATIONS---------------------------------------------------------------------5
HOW TO USE -------------------------------------------------------------------------7
CONSTRUCTION AND DIMENSIONAL DIAGRAM-----------------------29
MAIN PARTS COMPONENT ----------------------------------------------------31
WIRING DIAGRAM-----------------------------------------------------------------33
CIRCUIT DIAGRAM----------------------------------------------------------------35
PRINTED WIRING BOARD LOCATION DIAGRAM ----------------------41
BLOCK DIAGRAM------------------------------------------------------------------44
BASIC MODE ------------------------------------------------------------------------45
REFRIGERATING CYCLE DIAGRAM-----------------------------------------59
AUTO SWING FUNCTION-------------------------------------------------------60
DESCRIPTION OF MAIN CIRCUIT OPERATION-------------------------61
SERVICE CALL Q & A------------------------------------------------------------74
TROUBLE SHOOTING------------------------------------------------------------78
PARTS LIST AND DIAGRAM----------------------------------------------------98
RAS-18EH2/RAC-18EH2
RAC-18EH2
COOLING
HEATING
INDOOR UNIT
1,560 (155 ~ 2,200)
7.15 ~ 6.85
5.00 (0.9 ~ 5.2)
17,070 (3,072 ~ 17,754)
1,660 (155 ~ 2,200)
7.60 ~ 7.30
6.00 (0.9 ~ 8.1)
20,480 (3,072 ~ 27,649)
After installation
1 PHASE, 50/60 Hz, 220-230V
RAS-18EH2
850
650
298
45
RAC-18EH2
OUTDOOR UNIT

– 1 –
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.

– 2 –
WORKING STANDARDS FOR PREVENTING BREAKAGE OF SEMICONDUCTORS
1. Scope
The standards provide for items to be generally observed in carrying and handling semiconductors in rela-
tive 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 al-
ways use himself as a body earth. (Make yourself a body earth by passing one M ohm 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

– 3 –
(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
2
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

– 4 –
1. In quiet or stop operation, 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. In the event of power failure, the air conditioner will restart automatically in the previously selected mode
once the power is restored. In the event of power failure during TIMER operation, the timer will be reset
and the unit will begin or stop operating under a new timer setting.
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 (14°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

– 5 –
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
TEST/SERVICE SWITCH
TRANSFORMER
VARISTOR
NOISE SUPPRESSOR
THERMOSTAT
REMOTE CONTROL SWITCH (LIQUID CRYSTAL)
RAS-18EH2
PWM DC35V
NO
NO
–
NO
NO
NO
NO
NO
NO
YES
NO
NO
NO
NO
YES(IC)
YES
47 W
NO
NO
NO
YES (INTERNAL)
YES
NO
G4A
NO
NO
YES
NO
450NR
YES
YES(IC)
NO
1600g
CHARGELESS
UNIT
PIPES (MAX. 20M)
(MIN. 3M)
REFRIGERANT CHARGING
VOLUME
(Refrigerant R410A)
RAC-18EH2
JU1015DA
----------

– 6 –
Be sure to
completely seal
any gap with putty.
Figure showing the installation of Indoor and Outdoor unit
MODEL RAS-18EH2 / RAC-18EH2
●The difference in height
between the indoor and
outdoor unit should be kept
max 10m.
●The connecting pipe, no
matter big or small, should all
be insulated with insulation
pipe and then wrapped with
vinyl tape. (The insulator
will deteriorate if it is not
wrapped with tape).
The connection of insulated
drain hose.
Please use insulated drain
hose for the indoor piping
(commercial product).
The indoor piping should be
insulated with the enclosed
insulation pipe. (If the insulator
is insufficient, please use
commersial products).

– 7 –
INDOOR UNIT
NAMES AND FUNCTIONS OF EACH PART
Air filter
To prevent dust from coming into the indoor unit.
(Refer Instruction manual)
Front panel
Indoor unit indicators
Light indicator showing the operating condition.
(Refer page 8)
Horizontal deflector ●Vertical deflector
(Air Outlet)
Remote controller
Send out operation signal to the indoor unit. So as
to operate the whole unit.
(Refer Instruction manual)
WIDTH (mm)
780
850
MODEL
RAS-18EH2
RAC-18EH2
HEIGHT (mm)
280
650
DEPTH (mm)
215
298
MODEL NAME AND DIMENSIONS
OUTDOOR UNIT
DRAIN PIPE
Condensed water drain to outside.
CONNECTING CORD
AIR INLET (BACK, LEFT SIDE)
AIR OUTLET
●Air purifying filters are washable and can be use in 1 year time. Type number for this air purifying
filter is <SPX-CFH20>. Please use this number for ordering when you want to renew it.
●Air purifying filter should be cleaned every month or sooner if noticeable loading occurs. When
used overtime, it may loose its function. For maximum performance, it is recommended to replace
it every 1 year depending on application requirements.
NOTE

– 8 –
 

INDOOR UNIT INDICATORS
OPERATION INDICATOR
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”.
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 every 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.
TEMPORARY
SWIT
Press
Press
Temporary Switch
Temporary Switch
Nonconductor Stick
Nonconductor Stick
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.

– 9 –
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
–10°C (14°F).
The recommended maximum and minimum operating temperatures of the hot and cold sides
should be as below:
Cooling Heating

– 10 –
SAFETY PRECAUTION
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.
● During thunder storm, disconnect and turn off the circuit breaker.
● 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
!
!
● 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.
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
!
!

– 11 –
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.
● 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 place plants directly under the air flow as it is bad for the plants.
!

– 12 –
NAMES AND FUNCTIONS OF REMOTE CONTROL UNIT
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.
● 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 this 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.
AUTO
HEAT
DEHUMIDIFY
COOL
FAN
FAN SPEED
SILENT
LOW
MED
HI
SLEEPING
STOP (CANCEL)
START (RESERVE)
START/STOP
TIME
TIMER SET
TIMER SELECTOR
ON TIMER
OFF TIMER
AUTO SWING

– 13 –
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.
● WhenAUTO 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.
START
STOP
Press the (FAN SPEED) button, AUTO, LOW and SILENT is
available.
1

– 14 –
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.
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.)
2
3
1

– 15 –
DEHUMIDIFYING OPERATION
■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 function will stop (the indoor unit will stop emitting air) as soon as the room temperature becomes lower
than the setting temperature.
● The preset room temperature may not be reached depending on the number of people present in the room
or other room conditions.
Set the desired room temperature with the TEMPERATURE
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 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.
START
STOP
Press the FUNCTION selector so that the display indicates
(DEHUMIDIFY).
The FAN SPEED is set at LOW or SILENT.
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.
1
2

– 16 –
COOLING OPERATION
Use the device for cooling when the outdoor temperature is -10~43°C.
If in doors humidity is very high (80%), some dew may form on the air outlet grille of the indoor unit.
Press the FUNCTION selector so that the display indicates
(COOL).
Set the desired FAN SPEED with the (FAN SPEED) button (the
display indicates the setting).
(AUTO) : The FAN SPEED is HI at first and varies to
MED or LOW automatically when the preset
temperature has been reached.
(HI) : Economical as the room will become cool
quickly.
(MED) : Fan speed slow.
(LOW) : Fan speed slower.
(SILENT) : Fan speed ultra slower.
Set the desired room temperature with the TEMPERATURE button
(the display indicates the setting).
The temperature setting and the actual room temperature may
vary some how depending on conditions.
Press the (START/STOP) button. Cooling operation starts with
a beep. 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.
■ As the settings are stored in memory in the remote controller, you only
have to press the (START/STOP) button next time.
START
STOP
1
2
3

– 17 –
FAN SPEED (AUTO) ..... When theAUTO fan speed mode is set in the cooling/heating operation:
For the heating operation
● When the difference of room temperature and setting temperature is large,
fan starts to run at HI speed.
● After room temperature reaches the preset temperature, the heating
operation, which changes the fan speed and room temperature to obtain
optimum conditions for natural healthful heating will be performed.
● When the difference of room temperature and setting temperature is large,
fan starts to run at HI speed.
● After room temperature reaches the preset temperature, the cooling
operation, which changes the fan speed and room temperature to obtain
optimum conditions for natural healthful cooling will be performed.
For the cooling operation
FAN OPERATION
You can use the device simply as an air circulator. Use this function to dry the interior of the indoor unit at
the end of summer.
Press the FUNCTION selector so that the display indicates
(FAN).
Press the (FAN SPEED) button.
(HI) : The strongest air blow.
(MED) : Fan speed slow.
(LOW) : Fan speed slower.
(SILENT) : Fan speed ultra slower.
Press the (START/STOP) button. Fan operation starts with a
beep. Press the button again to stop operation.
START
STOP
1
2

– 18 –
HOW TO SET THE TIMER
You can set the device to turn off
at the preset time.
After you change the
batteries;
How to Cancel Reservation
Point the signal window of the remote controller toward the indoor unit, and press the (CANCEL) button.
The (RESERVED) sign goes out with a beep and the (TIMER) lamp turns off on the indoor unit.
1Press the (TIME) button.
1Press the (OFF-TIMER)
button, until the (OFF) mark
blinks on the display.
NOTE
You can set only one of the OFF-timer,
ON-timer and ON/OFF-timer.
● The device will turn on at
the designated times.
TIME
OFF TIMER
ON TIMER
RESERVE
CANCEL
2Set the turn-off time
with the TIMER control
button.
Press the (RESERVE)
button.
3Press the (ON-
TIMER) button so that the
(OFF) mark lights and
the (ON) mark blinks.
1Press the (ON-TIMER)
button the (ON) mark blinks
on the display.
● The device will turn on (off) and off
(on) at the designated times.
● The switching occurs first at the
preset time that comes earlier.
● The arrow mark appearing on the
display indicates the sequence of
switching operations.
1Press the (ON-OFF)
button so that the (OFF)
mark blinks.

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● The time indication will disappear
automatically in 10 second.
● To check the current time setting,
press the (TIME) button twice.
The setting of the current time is
now complete.
● The timer may be used in three ways: off-timer, on-timer, and on/off (off/on)-timer. Set the current time at first
because it serves as a reference.
● As the time settings are stored in memory in the remote controller, you only have to press the (RESERVE)
button in order to use the same settings next time.
2Press the
(TIME) button. 3Set the current time with the TIMER control button.
Example: The current time is 1:30 p.m.
2Set the turn-off time with the
TIMER control button.
The setting of turn-off time is now complete.
Example: The device will turn off at 11:00p.m.
Example:
The device will turn on at 7:00 a.m.
The setting of the turn-on time is now complete.
4Set the turn-on time with the
TIMER control button. 5Point the signal window of the remote controller toward the indoor unit, and
press the (RESERVE) button.
The (ON) mark starts lighting instead of flashing and the (RESERVED)
sign lights. Abeep occurs and the (TIMER) lamp lights on the indoor unit.
3Point the signal window of the remote controller toward the indoor unit, and
press the (RESERVE) button.
The (ON) mark starts lighting instead of flashing and the (RESERVED)
sign lights. Abeep occurs and the (TIMER) lamp lights on the indoor unit.
2Set the turn-on time with the
TIMER control button.
Example:
The device will turn off at 10:30 p.m. and it will be turned on
at 7:00 a.m.
The settings of the turn-on/off times are now complete.
4Press the (TIME) button again.
The time indication starts lighting
instead of flashing.
3Point the signal window of the remote controller toward the indoor unit, and
press the (RESERVE) button.
The (OFF)markstartslightinginsteadofflashingandthesign (RESERVED)
lights. A beep occurs and the (TIMER) lamp lights on the indoor unit.