Hitachi RAS-14CH4 User manual

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
ROOM AIR CONDITIONER
INDOOR UNIT + OUTDOOR UNIT
MARCH 2004 H.A.P.M.
REFER TO THE FOUNDATION MANUAL
CONTENTS
SPECIFICATIONS ............................................................... 5
SAFETY PRECAUTION ...................................................... 6
HOW TO USE ..................................................................... 8
CONSTRUCTION AND DIMENSIONAL DIAGRAM ........ 27
MAIN PARTS COMPONENT ............................................ 28
WIRING DIAGRAM ........................................................... 30
BASIC MODE .................................................................... 35
AUTO SWING FUNCTION ............................................... 39
REFRIGERATING CYCLE DIAGRAM .............................. 40
SERVICE CALL Q & A ..................................................... 42
TROUBLESHOOTING ....................................................... 47
PARTS LIST AND DIAGRAM ........................................... 49
RAS-14CH4
RAC-14CH4
RAS-14CH4
RAC-14CH4
TYPE WALL TYPE
INDOOR UNIT OUTDOOR UNIT
MODEL RAS-14CH4 RAC-14CH4
POWER SOURCE 1Ø, 220 V, 50 Hz
TOTAL INPUT (W) 1,290
COOLING TOTAL AMPERES (A) 6.0
CAPACITY (kW) 3.55
(B.T.U./h) 12,120
TOTAL INPUT (W) 1,370
HEATING TOTAL AMPERES (A) 6.30
CAPACITY (kW) 4.10
(B.T.U./h) 14,000
W 815 820
DIMENSIONS (mm) H 298 520
D 179 280
NET WEIGHT (kg) 8 39
SPECIFICATIONS
❈After installation
SERVICE MANUAL
TECHNICAL INFORMATION
FOR SERVICE PERSONNEL ONLY
PM NO. 0204E
RAS-14CH4
RAC-14CH4

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.
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 the 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 occurrence 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 1MΩor 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 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 after reinforced or at a
new location.
10. Any inflammable object must not 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.
If the contacts of electrical parts
are defective, replace the
electrical parts without trying to
repair them.
Spray
gasoline
gasbombe thinner
DANGER
First, I must disconnect
the power cord plug
from the power outlet.

– 1 –
HITACHI IC401TH1 ,188UV
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).
(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 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.
IC
IC
A conductive polyvinyl bag
Conductive sponge
Fig. 1 Conductive Container
Fig. 2 Body Earth
Body earth
(Elimik conductive band)
Clip for connection with
a grounding wire

–2 –
(6) Use a three wire type soldering iron including a grounding wire.
Bare copper wire (for body earth)
Working table
Resistor of 1 MΩ(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, 10MΩor 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

–3 –
CAUTION
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. If the room air conditioner is stopped by setting the temperature or mis-operation, and then re-started in a
moment, cooling 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.
4. This room air conditioner should not be used at the cooling operation when the outside temperature is
below 20°C.
5. When the operation knob is set to “COOL”from another position, IC delay circuit functions and stops the
compressor for the first 3 minutes, which is not an abnormal phenomenon.

–4 –
20
270(10-21/32")
145(5-11/16")
12(1-1/2")
50(2")
500(19-11/16")
The Length of Indoor Unit
Connecting Cord
about
0.9m about 1.6m
CAUTION
In case the pipe length is more than 8m, add refrigerant R22 at
25 gram per every meter exceeds. However, pipe length shall not
exceed 10m.
Figure showing the Installation
of Indoor and Outdoor unit.
Cut away shaded
portion, and finish
the edge of the
opening so that
there is no burr.
Direction of Piping
Horizontally
perpendicular
to the unit.
Connection
There are 4 directions allowed, namely,
horizontally perpendicular to the unit,
vertically down from right, horizontally
out from right.
Don't form the piping downward at the
left of the unit.
Dimension of Mounting Stand
of the outdoor unit
(unit: mm)
above 200mm
above 50mm when
installed on the
ceiling of balcony.
above 300mm
❇ above 700mm above 200mm
❇above 100mm
❇give clearance as
wide as possible
Maximum pipe length 10m
Minimum pipe length 5m
Plug
The indoor piping should be
insulated with the enclosed
insulation pipe. (If the insulator
is insufficient, please use
commercial products).
●The difference in height
between the indoor and
outdoor unit should be kept
below 5m.
●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.
Inner diameter ø16mm
Please use insulated drain hose
for the indoor piping (commercial
product.)
above 100mm
above 100mm
above 50mm
2,300mm or more
above 300mm
about 0.45m
must not bend
Be sure to
completely
seal any gap
with putty.

–5 –
SPECIFICATIONS
MODEL RAS-14CH4 RAC-14CH4
FAN MOTOR 10 W 20 W
FAN MOTOR CAPACITOR 1 µF, 450 V 2.5 µF, 450 V
FAN MOTOR PROTECTOR YES (INTERNAL) YES (INTERNAL)
COMPRESSOR NO SH933RC2-U
COMPRESSOR MOTOR CAPACITOR NO 35 µF, 440 V
OVERLOAD PROTECTOR NO NO
OVERHEAT PROTECTOR NO YES
FUSE (for MICRO COMPUTER) 3.0 A NO
POWER RELAY G4A-RY-200 NO
POWER SWITCH YES NO
TEMPORARY SWITCH YES NO
SERVICE SWITCH YES NO
TRANSFORMER YES NO
VARISTOR 450NR NO
NOISE SUPPRESSOR NO NO
SOLID STATE RELAY FOR FAN (FAN SSR) S26MD02 NO
EXTERNAL FAN AND REVERSING VALVE RELAY G4U NO
REMOTE CONTROL SWITCH (LIQUID CRYSTAL) YES NO
THERMOSTAT YES (IC) NO
FUSE CAPACITY 15A TIME DELAY FUSE
UNIT ❇ 1,080 g
REFRIGERANT CHARGING WITHOUT REFRIGERANT BECAUSE COUPLING
VOLUME IS FLARE TYPE.
(Refrigerant 22) PIPES P - 103 VK1 (3m), P - 105 VK1 (5m),
P - 108 VK1 (8m)
❇1,080g for piping set of 5 ~ 8m, additional 25g/m R22 is required for additional 8m onward, but cannot exceed
10m.

–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.
● Please keep this manual after reading.
Make sure to connect earth line. The sign in the figure indicates prohibition.
Indicates the instructions that must be followed.
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.
CAUTION
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.
W
A
R
N
I
N
G
W
A
R
N
I
N
G
● Avoid an extended period of direct air flow for your health.
● 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.
● During thunder storm, disconnect and turn off the circuit breaker.
PRECAUTIONS DURING OPERATION

–7 –
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 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.
●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.
●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 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.
●Do not climb on the outdoor unit or put objects on it.
●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.
● 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.
PRECAUTIONS DURING OPERATION

–8 –
OUTDOOR UNIT
Air Filter
To prevent dust from coming into the indoor unit.
(Refer page 24)
Suction Grille (Air Inlet)
Indoor unit Indicators
Light indicator showing the operation condition.
(Refer page 9)
Horizontal Deflector • Vertical Deflector
(Air outlet)
(Refer page 20)
Remote Control
Send out operation signal to the indoor unit.
So as to operate the whole unit.
(Refer page 10)
Drain pipe
Condensed water drain to outside.
Connecting cord
Air inlet (Back and right side)
Air outlet
MODEL NAME AND DIMENSIONS
MODEL WIDTH (mm) HEIGHT (mm) DEPTH (mm)
RAS-14CH4 815 298 179
RAC-14CH4 820 520 280
NAMES AND FUNCTIONS OF EACH PART
INDOOR UNIT

–9 –
PUSH PUSH
●OPERATION LAMP
This lamp lights during operation.
●HOT KEEP LAMP
This lamp lights in the following cases during heating.
While this is lit, heated air will not come out of the indoor
unit.
(1) During preheating
For about 2-3 minutes after start up.
(2) During defrosting
Defrosting will be performed about once an hour when
frost forms on the heat exchanger of the outdoor unit,
for 5-10 minutes each time.
(3) When the preset temperature has been reached.
Heating operation will stop when the room temperature
has risen to the preset value.
(4) During AUTO FRESH defrosting
●FILTER lamp
When the device is operated for a total of about 100 hours,
the FILTER lamp lights to indicate that it is the time to
clean the filter. The lamp goes out when the POWER
SWITCH set to OFF and ON again.
●TIMER lamp
This lamp lights when
the timer is working
●Press the mark “PUSH”on the left and right sides of the
suction grille to open it.
●After the work is finished, slightly lift the suction grille and
then close it.
Press the mark “PUSH”on the left and right sides of the
suction grille to fix it securely.
TEMPORARY SWITCH
Use the temporary switch when operation can not be done
with the remote controller.
1. 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 is turned on again,
the operation is done in automatic mode.
2. When the operation is stopped or when the operation is
done with the remote controller again, press the temporary
switch once again.
POWER SWITCH
When you do not use the room air conditioner, set the power
switch to “OFF”.
INDOOR UNIT INDICATORS
OPERATION INDICATOR

–10 –
AUTO
HEAT
DEHUMIDIFY
COOL
FAN
FAN SPEED
LOW
MED
HI
SLEEPING
STOP (CANCEL)
START (RESERVE)
START/STOP
TIME
TIMER SET
TIMER SELECTOR
ON TIMER
OFF TIMER
AUTO SWING
RESET
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.
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.
●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 button
Use this button 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 button
●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)
(during the (FAN) mode, from (HI) to (MED) to (LOW)).
●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.

–11 –
C
RESET
AUTOMATIC OPERATION
Initial room temperature Function Temperature setting FAN SPEED
(approx.)
Over 27°C COOL 27°C
Under 23°C HEAT 23°C
HI at start, MED or LOW after
the preset temperature is
reached
Slightly lower than the
room temperature
HI at start, MED or LOW after
the preset temperature is
reached
The device will automatically determine the mode of operation, HEAT, COOL or DEHUMIDIFY depending
on the initial room temperature.The selected mode of operation will not change when the room temperature
varies.
Press the FUNCTION selector so that the display indicates the
(AUTO) mode of operation.
●When AUTO has been selected, the device will automatically
determine the mode of operation, HEAT, COOL or
DEHUMIDIFY depending on the initial room temperature.
Press the (START/STOP) button.
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.
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.
■ CONDITION OF AUTOMATIC OPERATION
●The selected mode of operation will not change during the operation even though the room temperature
change.
1
START
STOP
23~27°C DEHUMIDIFY LOW
➡
➡
➡

–12 –
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.
Press the FUNCTION selector so that the display indicates the
(HEAT).
Press the (START/STOP) button. Heating operation starts
with a beep. Press the button again to stop operation.
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
automatically when the preset temperature has
been reached.
(HI) : Economical as the room will become warm
quickly.
But you may feel a chill at the beginning.
(MED) : Quiet.
(LOW) : More quiet.
Set the desired room temperature with the TEMPERATURE
button (the display indicates the setting).
The range of 18-22°C is recommended as the room
temperature for heating.
If the temperature setting is 20°C, the room
temperature will be controlled at around 20°C.
The temperature setting and the actual room temperature may
vary somewhat depending on conditions.
■As the settings are stored in memory in the remote controller, you only
have to press the (START/STOP) button next time.
˚
C
˚
C
RESET
1
START
STOP
2
3

–13 –
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.
Press the FUNCTION selector so that the display indicates
(DEHUMIDIFY).
The FAN SPEED is set at LOW automatically.
The FAN SPEED button does not work.
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.
■As the settings are stored in memory in the remote controller, you only
have to press the (START/STOP) button next time.
Press the (START/STOP) button. Dehumidifying operation
starts with a beep. Press the button again to stop operation.
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.
■ Dehumidifying Function
˚
C
˚
C
RESET
1
START
STOP
2

–14 –
COOLING OPERATION
Use the device for cooling when the outdoor temperature is 22-42°C.
If humidity is very high (over 80%) indoors, some dew may form on the air outlet grille of the indoor unit.
Press the FUNCTION selector so that the display indicates the
(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
automatically when the preset temperature has
been reached.
(HI) : Economical as the room will become warm
quickly.
But you may feel a chill at the beginning.
(MED) : Quiet.
(LOW) : More quiet.
Set the desired room temperature with the TEMPERATURE
button (the display indicates the setting).
The range of 25-28°C is recommended as the room
temperature for cooling.
If the temperature setting is 27°C, the room
temperature will be controlled at around 27°C.
The temperature setting and the actual room temperature may
vary somewhat depending on conditions.
˚C
˚C
RESET
1
2
3
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

–15 –
RESET
FAN OPERATION
Press the FUNCTION selector so that the display indicates the
(FAN).
1
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 (FAN SPEED) button.
2
START
STOP
Press the (START/STOP) button. Fan operation starts with
a beep. Press the button again to stop operation.
FAN SPEED (AUTO) … When the AUTO fan speed mode is set in the cooling/heating operation:
For the heating operation
●The fan speed will automatically change according to the temperature of
discharged air.
●When the difference of room temperature and setting temperature is
large, fan starts to run at HI speed.
●When the room temperature reaches setting temperature, fan speed
changes to LOW automatically.
For the cooling 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 cooling
operation, which changes the fan speed and room temperature to obtain
optimum conditions for natural healthful cooling will be performed.

–16 –
AM
Start
Stop
PM
Start Stop
PM
AM
PM
●
●
●
1
OFF-Timer
After you change the
batteries;
1
1
1
2
ON-Timer
Time, Day, Month
●The device will turn on at
the designated times.
M D
M D
AM
STOP
Start
ON/OFF-Timer
Set the current month and
day with the TIMER control
button.
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.
Press the (ON-OFF)
button so that the (OFF)
mark blinks.
Set the turn-off time
with the TIMER control
button.
Press the (RESERVE)
button.
3
Press the (ON-
TIMER) button so that the
(OFF) mark lights and
the (ON) mark blinks.
Press the (ON-TIMER)
button the (ON) mark blinks
on the display.
Press the (OFF-TIMER)
button. The (OFF) mark blinks
on the display.
You can set the device to turn off
at the present time.
RESET
HOW TO SET THE TIMER
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.
NOTE
You can set only one of the OFF-timer,
ON-timer and ON/OFF-timer.
TIME, DAY,
MONTH
(current time,
day, month)
OFF TIMER
ON TIMER
RESERVE
CANCEL

–17 –
Point the signal window of the remote controller toward the indoor unit, and
press the (RESERVE) button.
The (OFF) mark starts lighting instead of flashing and the sign (RESERVED)
lights. A beep occurs and the (TIMER) lamp lights on the indoor unit.
PM
PM
3
●
●
2
3
Example: The current time is 1:30 p.m.
2
The setting of turn-off time is now complete.
Example: The device will turn off at 11:00p.m.
4
2
4
PM PM
AM PM
AM
AM
PM
PM
Point 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 sign (RESERVED)
lights. A beep occurs and the (TIMER) lamp lights on the indoor unit.
3
Point 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 sign (RESERVED)
lights. A beep occurs and the (TIMER) lamp lights on the indoor unit.
5
AM AM
Press the
(TIME) button.
Set the current time with
the TIMER control button.
Set the turn-off time with
the TIMER control button.
Set the turn-on time with
the TIMER control button.
Set the turn-on time with
the TIMER control button.
Press the (TIME) button again.
The time indication starts lighting instead
of flashing.
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.
Example:
The device will automatically turn on earlier so that
the preset temperature can be reached at 7:00 a.m.
The setting of the turn-on time is now complete.
Example:
The device will turn off at 10:30 p.m. and then
automatically turn on earlier so that the preset
temperature can be reached at 7:00 a.m.
The settings of the turn-on/off times are 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.

–18 –
1
1 hour 2 hours 3 hours 7 hours
Sleep timer off
2
H
Sleep
timer Start
H
H
AM
AM
HOW TO SET THE SLEEP TIMER
Set the current time at first if it is not set before (see the pages for setting the current
time). Press the (SLEEP) button, and the display changes as shown below.
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.
Mode Indication
Sleep timer
SLEEP
Sleep Timer: The device will continue working for the designated
number of hours and then turn off.
Point the signal window of the remote controller toward the indoor
unit, and press the SLEEP button.
The timer information will be displayed on the remote controller.
The TIMER lamp lights with a beep from the indoor unit.When the
sleep timer has been set, the display indicates the turn-off time.
Example: If you set 3 hours sleep
time at 11:38 p.m., the turn-off
time is 2:38 a.m.
The device will be turned off by the sleep
timer and turned on by on-timer.
Set the On-timer.
Press the (SLEEP) button and set the sleep timer.
Example:
In this case, the device will turn off
in 2 hours (at 1:38 a.m.) and turn
on early so that the preset
temperature will be almost reached
at 6:00 next morning.