Hitachi RAS-07G4, RAS-14G4, RAC-07G4, RAC-14G4, RAS-09G4 Service Manual

NO. 0198E

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

ROOM AIR CONDITIONER

INDOOR UNIT + OUTDOOR UNIT

DECEMBER 2003

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

H

D

(kg)

TYPE

MODEL

POWER SOURCE

TOTAL INPUT

TOTAL AMPERES

CAPACITY

DIMENSIONS
(mm)

NET WEIGHT

SPECIFICATIONS

RAS-07G4
RAS-09G4
RAS-14G4

CONTENTS

SPECIFICATIONS ----------------------------------------------------- 5

HOW TO USE ---------------------------------------------------------- 8

CONSTRUCTION AND DIMENSIONAL DIAGRAM ------- 30

MAIN PARTS COMPONENT ------------------------------------- 32

WIRING DIAGRAM -------------------------------------------------- 34

PRINTED WIRING BOARD LOCATION DIAGRAM ------- 37

BLOCK DIAGRAM --------------------------------------------------- 39

BASIC MODE --------------------------------------------------------- 41

REFRIGERATING CYCLE DIAGRAM ------------------------- 47

DESCRIPTION OF MAIN CIRCUIT OPERATION --------- 49

AUTO SWING FUNCTION ---------------------------------------- 57

SERVICE CALL Q & A -------------------------------------------- 58

TROUBLE SHOOTING --------------------------------------------- 63

PARTS LIST AND DIAGRAM ------------------------------------ 66

RAS-07G4/RAC-07G4
RAS-09G4/RAC-09G4
RAS-14G4/RAC-14G4

COOLING

After installation

RAC-14G4

RAC-07G4
RAC-09G4

(WALL TYPE)

INDOOR UNIT

RAS-07G4

780

280

210

9.0

OUTDOOR UNIT

RAC-07G4

INDOOR UNIT

RAS-09G4

OUTDOOR UNIT

RAC-09G4

INDOOR UNIT

RAS-14G4

OUTDOOR UNIT

RAC-14G4

700

570

210

32

750

570

280

38

780

280

210

9.0

700

570

210

32

780

280

210

9.0

1 PHASE, 50 Hz, 220-230-240V

590-610-630

2.80-2.80-2.80

2.10

7,160

1 PHASE, 50 Hz, 220-230-240V

890-900-950

4.20-4.10-4.10

2.90

9,900

1 PHASE, 50 Hz, 220-230-240V

1060-1090-1120

5.00-5.00-4.90

3.50

11,940

– 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 1MΩ 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.

DANGER

First, I must disconnect
the power cord plug

from the power outlet.

– 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 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 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 stopping 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 nearby, it is recommended 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 airconditioner 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 (50°F).

!

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

SERVICE SWITCH

TRANSFORMER

VARISTOR

FUSE CAPACITY (TIME DELAY FUSE)

THERMOSTAT

REMOTE CONTROL SWITCH (LIQUID CRYSTAL)

RAS-07G4
RAS-09G4
RAS-14G4

20 W

NO

NO

–

NO

NO

NO

3.15A

G4A

YES

YES

YES

NO

450NR

---------

YES(IC)

YES

---------

---------

20 W 30 W

1.5µF, 450 VAC

2.5µF, 450VAC

NO

20µF, 450 VAC

25µF, 450 VAC

YES

NO

NO

NO

NO

NO

NO

NO

NO

10 A 15 A

NO

NO

1050g

10m

UNIT

MAX. PIPES

REFRIGERANT CHARGING
VOLUME
(Refrigerant 410A)

RAC-07G4 RAC-14G4RAC-09G4

5RS080 5PS132

650g600g

5PS112

15m

WITHOUT REFRIGERANT BECAUSE COUPLING IS FLARE TYPE

– 6 –

The indoor piping should be
insulated with the enclosed
insulation pipe. (If the
insulator is insufficient,
please use commersial
products).

inner diameter ø 16mm

The connection of insulated
drain hose.

Please use insulated drain
hose for the indoor piping
(commercial product).

The difference in height
between the indoor and
outdoor unit should be
kept max 5m.
The connecting pipe, no
matter big or small,
should all be insulated
with insulation pipe and
then warapped with vinyl
tape. (The insulator will
deteriorate if it is not
wrapped with tape).

MODEL RAS-07G4 / RAC-07G4 and RAS-09G4 / RAC-09G4

Figure showing the installation of Indoor anf Outdoor unit

The installation height of indoor unit must be 2.3m or more from floor in a non public area

CAUTION

!

– 7 –

above 50mm

above 100mm

above

0.45m

above 300mm

must not bend

above 100mm

2,300mm or more

1

2

Maximum pipe length 15m

Minimum pipe length 5m

above 200mm

above 700mm

above 200mm

above 50mm when
installed on the
ceiling of balcony

(

)

above 100mm

above 100mm

give clearance as
wide as possible

Plug

The installation height of indoor unit must be 2.3m or more from floor in a non public area

CAUTION

!

The indoor piping should be
insulated with the enclosed
insulation pipe. (If the
insulator is insufficient,
please use commersial
products).

inner diameter ø 16mm

The connection of insulated
drain hose.

Please use insulated drain
hose for the indoor piping
(commercial product).

The difference in height
between the indoor and
outdoor unit should be
kept max 5m.
The connecting pipe, no
matter big or small,
should all be insulated
with insulation pipe and
then warapped with vinyl
tape. (The insulator will
deteriorate if it is not
wrapped with tape).

MODEL RAS-14G4 / RAC-14G4

Figure showing the installation of Indoor anf Outdoor unit

– 8 –

!

SAFETY PRECAUTION

●

Please read the “Safety Precaution” carefully before operating the unit to ensure correct usage of the unit.

●

Pay special attention to signs of “ Warning” and “ Caution”. The “Warning” section contains matters which,
if not observed strictly, may cause death or serious injury. The “Caution” section contains matters which may
result in serious consequences if not observed properly. Please observe all instructions strictly to ensure safety.

●

The sign indicate the following meanings.

●

Please keep this manual after reading.

WARNING

PRECAUTIONS DURING INSTALLATION

●

Do not reconstruct the unit.
Water leakage, fault, short circuit or fire may occur if you reconstruct
the unit by yourself.

●

Please ask your sales agent or qualified technician for the installation
of your unit. Water leakage, short circuit or fire may occur if you install
the unit by yourself.

●

Please use earth line.
Do not place the earth line near water or gas pipes, lightning-conductor,
or the earth line of telephone. Improper installation of earth line may
cause electric shock.

●

A circuit breaker should be installed depending on the mounting site of
the unit. Without a circuit breaker, the danger of electric shock exists.

●

Do not install near location where there is flammable gas. The outdoor
unit may catch fire if flammable gas leaks around it.

●

Please ensure smooth flow of water when installing the drain hose.

CAUTION

!

!

PRECAUTIONS DURING SHIFTING OR MAINTENANCE

PRECAUTIONS DURING OPERATION

●

Avoid an extended period of direct air flow for your health.

W

A
R
N

I

N

G

!

●

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.

●

Do not insert a finger, a rod or other objects into the air outlet or inlet. As the
fan is rotating at a high speed, it will cause injury. Before cleaning, be sure
to stop the operation and turn the breaker OFF.

●

During thunder storm, disconnect and turn off the circuit breaker.

●

Do not use any conductor as fuse wire, this could cause fatal accident.

!

Make sure to connect earth line.

Indicates the instructions that must be followed.

The sign in the figure indicates prohibition.

W
A
R
N

I
N
G

!

– 9 –

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.

●

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.

– 10 –

NAMES AND FUNCTIONS OF EACH PART

INDOOR UNIT

Air filter

To prevent dust from coming into the indoor unit.
(Refer page 26)

Front panel

Indoor unit indicators

Light indicator showing the operating condition.
(Refer page 11)

Horizontal deflector

●

Vertical deflector

(Air Outlet)

(Refer page 17)

Remote controller

Send out operation signal to the indoor unit. So as to
operate the whole unit.
(Refer page 12)

OUTDOOR UNIT

Drain pipe

Condensed water drain to outside.

Connecting cord and insulation pipe for piping

Air inlet (Back, Left side)

Air outlet

Drain pipe

Condensed water drain to outside.

Connecting cord and insulation pipe for piping

Air inlet (Back and Left side)

Air outlet

WIDTH (mm)

780

700

750

MODEL

RAS-07G4/09G4/14G4

RAC-07G4/09G4

RAC-14G4

HEIGHT (mm)

280

570

570

DEPTH (mm)

210

210

280

MODEL NAME AND DIMENSIONS

RAC-07G4
RAC-09G4

RAC-14G4

– 11 –

INDOOR UNIT INDICATORS

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.

OPERATION INDICATOR

FILTER LAMP

When the device is operated for a total of about 100
hours, the FILTER lamp lights indicates that it is time
to clean the filter. The lamp goes out when the
“ (AUTO SWING)” button is pressed while the
device is on “STANBY MODE”.

OPERATION LAMP

This lamp lights during operation.

TIMER LAMP

This lamp lights when the timer is working.

TEMPORARY
SWITCH

TEMPORARY
SWITCH

Press

Temporary Switch

Non-conductor Stick

– 12 –

RESET

˚

CH

AUTO

COOL

DEHUMIDIFY

CIRCULATION

FAN

FAN SPEED
LOW

MED
HI

SLEEPING

STOP (CANCEL)

START (RESERVE)

START/STOP

TIME

TIMER SET

TIMER SELECTOR
ON TIMER
OFF TIMER

AUTO SWING

˚

CH

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 button

Use this button to raise or lower the temperature setting. (Keep pressed, and
the value will change more quickly.)

●

OFF-TIMER button Select the turn OFF time.

●

ON-TIMER button Select the turn ON time.

●

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 (COOL) to (DEHUMIDIFY) to

(CIRCULATION) 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.

●

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.

– 13 –

RESET

AUTOMATIC OPERATION

The device will automatically determine the mode of operation COOL, or Dehumidify, depending on the
initial room temperature. The selected mode of operation will not change when the room temperature
varies.

■ 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.

● When AUTO has been selected, the device will

automatically determine the mode of operation COOL or
Dehumidify, depending on the initial room temperature
and outdoor temperature.

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.

°C

■ CONDITION OF AUTOMATIC OPERATION

START

STOP

Over 27°C COOL

16~27°C

TEMPERATURE

SETTING

FUNCTION

27°C

HIGH at start, LOW after
the preset temperature is
reached.

-

DEHUMIDIFY

-

INITIAL ROOM

TEMPERATURE (APPROX.)

FAN SPEED

Slightly lower than the
room temperature

LOW

● The selected mode of operation will not change during the operation even though the room temperature

change.

1

– 14 –

■ As the settings are stored in memory in the remote controller, you

only have to press the

(START/STOP) button next time.

RESET

COOLING OPERATION

Use the device for cooling when the outdoor temperature is 22-42°C.
If indoor 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 automatically when the preset temperature
has been reached.

(HI) : Economical as the room will become cool

quickly.

(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 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.

1

2

3

START

STOP

– 15 –

■ 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.

RESET

DEHUMIDIFYING OPERATION

Use the device for dehumidifying when the room temperature is over 16°C.
When it is under 15°C, the dehumidifying function will not work.

Set the desired room temperature with the 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.

2

■ 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 automatically.
The FAN SPEED button does not work.

1

– 16 –

FAN SPEED (AUTO)

.....

When the AUTO fan speed mode is set in 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.

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.

Press the (START/STOP) button. Fan operation starts
with a beep. Press the button again to stop operation.

1
2

START

STOP

RESET

RESET

CIRCULATION OPERATION

Press the FUNCTION selector so that the display indicates

(CIRCULATE).

Press the FAN SPEED button and select the desired FAN
SPEED (the display indicates your choice).

Press the temperature control button to set to the desired
temperature.

Press the

(START/STOP) button. Circulating 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.

2

1

3

START

STOP

– 17 –

ADJUSTING THE AIR DEFLECTOR

1

2

Adjustment of the conditioned air to the left and right.

Hold the vertical air deflector as shown in the figure and adjust
the conditioned air to the left and right.

● If the “ (AUTO SWING)” button is pressed once,

the horizontal air deflector swings up and down. If the
button is pressed again, the deflector stops in its current
position. Several seconds (about 6 seconds) may be
required before the deflector starts to move.

● Use the horizontal air deflector within the adjusting range

shown on the right.

● When the operation is stopped, the horizontal air deflector

moves and stops at the position where the air outlet
closes.

!

CAUTION

● In “Cooling” operation, do not keep the horizontal air

deflector swinging for a long time. Some dew may form
on the horizontal air deflector and dew may drop.

Adjustment of the conditioned air in the upward and downward
directions.

The horizontal air deflector is automatically set to the proper
angle suitable for each operation. The deflector can be swung
up and down continuously and also set to the desired angle
using the “ (AUTO SWING)” button.

RESET

!

CAUTION

● When operating the unit in cooling operation with the air deflector facing down and moving automatically

for a long period of time, water will condensed on the air deflector and drips down occasionally. This
will wet your furniture.

Vertical

about 15

about 60

When cooling,
dehumidifying

– 18 –

RESET

HOW TO SET THE TIMER

ON/OFF-Timer

● 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.

1

Press the (ON-OFF)

button so that the (OFF)
mark blinks.

OFF-Timer

You can set the device to turn off
at the present 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.

1

Set the current month and

day with the TIMER control
button.

1

Press the (OFF-TIMER)

button. The (OFF) mark blinks
on the display.

1

Press the (ON-TIMER)

button the (ON) mark blinks
on the display.

2

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.

NOTE

You can set only one of the OFF-timer,
ON-timer and ON/OFF-timer.

ON-Timer

Time, Day, Month

● The device will turn on at

the designated times.

TIME, DAY,
MONTH
(current time,
day, month)

OFF TIMER

ON TIMER

RESERVE

CANCEL

M D

M D

AM

STOP

Start

AM

Start

Stop

PM

Start Stop

PM

AM

PM

– 19 –

3

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.

● The time indication will disappear

automatically in 10 seconds.

● 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.

2

Press the

(TIME) button.

3

Set the current time with the

TIMER control button.

Example: The current time is 1:30 p.m.

2

Set 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 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.

4

Set the turn-on time with the

TIMER control button.

5

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 (RESERVED) sign
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 (RESERVED) sign
lights. A beep occurs and the (TIMER) lamp lights on the indoor unit.

2

Set the turn-on time with the

TIMER control button.

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.

4

Press the (TIME) button again.

The time indication starts lighting
instead of flashing.

PM PM

AM

PM

PM

PM

AM

AM

AM

AM

PM

PM

– 20 –

HOW TO SET THE SLEEP TIMER

1

Set the ON-timer.

Set the current time 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.

Mode

Sleep timer

Indication

1 hour 2 hours 3 hours 7 hours

Sleep timer off

44 44

1

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.

2

Press the (SLEEP) button and set the sleep timer.

The device will be turned off by the sleep
timer and turned on by on-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.

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.

SLEEP

H

H

AM

AM

Sleep

timer

Start

H

– 21 –

Cooling

“ ”

and

dehumidifying

“ ”

Explanation of the sleep timer

The device will control the FAN SPEED and room temperature automatically so as to be quiet and
good for people’s health.
You can set the sleep timer to turn off after 1, 2, 3 or 7 hours. The FAN SPEED and room
temperature will be controlled as shown below.

Function Operation

The settings of room temperature and circulation are varied.

The room temperature will be
controlled 2°C above the
temperature and the FAN
SPEED will be set to LOW
setting 1 hour after the setting
of the sleep timer.

Fan

“ ”

Operation with the sleep timer

● If date or current time is not set, sleep timer can not be set.

● If you set the sleep timer after the off-, on/off- or off/on-timer has been set, the sleep timer

becomes effective instead of the off-, on/off- or off/on-timer set.

● You can not set other timer during sleep timer operation.

● The angle of horizontal air deflector shifts up automatically after three hours on sleep timer

operation.

● Fan will stop for a while if room temperature reaches setting temperature.

NOTE

Sleep
timer set

1 hour

3 hours later

7 hours later

2 hours
later

6 hours
later

– 22 –

HOW TO EXCHANGE THE BATTERIES IN THE REMOTE CONTROLLER

1

Remove the cover as shown in the figure and take out the
old batteries.

=

2

Install the new batteries.
The direction of the batteries should match the marks in the
case.

1. Do not use new and old batteries, or different kinds of batteries
together.

2. Take out the batteries when you do not use the remote controller
for 2 or 3 months.

CAUTION

!

Push and pull to the
direction of arrow

– 23 –

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

– 24 –

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 8W 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.

!

OFF

Interference From Electrical Products

Inverter-type
fluorescent
lamp.

To prevent
interference,
place at least
1m away.

TV

Caution

To avoid noise interference, please place the indoor
unit and its remote controller at least 1m away from
electrical products.

!

– 25 –

ATTACHING THE AIR CLEANSING AND DEODORIZING FILTERS

1

Open the front panel.

● Pull up the front panel by holding it at both sides

with both hands.

2

Remove the filter.

● Push upward to release the claws and pull out

the filter.

3

Attaching the air cleansing and deodorizing
filters to the filter.

● Attach the air cleansing and deodorizing filters to

the frame by gently compress its both sides and
release after insertion into filter frame.

4

Attach the filters.

● Attach the filters by ensuring that the surface

written “FRONT” is facing front.

● After attaching the filters, push the front panel at

three arrow portion as shown in figure and close
it.

Cleaning and maintenance must be carried out only by qualified service personal. Before cleaning,
stop operation and switch off the power supply.

CAUTION

!

!

CAUTION

Do not bend the air cleansing
and deodorizing filter as it may
cause damage to the structure.

NOTE

● In case of removing the air cleansing and deodorizing filters, please follow the above procedures.

● The cooling capacity is slightly weakened and the cooling speed becomes slower when the air cleansing

and deodorizing filters are used. So, set the fan speed to "HIGH" when using it in this condition.

● Air cleansing and deodorizing filters are washable and reusable up to 20 times by using vacuum

cleaner or water rinse under running tap water. Type number for this air cleansing filter is
<SPX-CFH11>. Please use this number for ordering when you want to renew it.

● Do not operate the air conditioner without filter. Dust may enter the air conditioner and fault may occur.

– 26 –

MAINTENANCE

Cleaning and maintenance must be carried out only by qualified service personal. Before cleaning,

stop operation and switch off the power supply.

1. AIR FILTER

Clean the air filter, as it removes dust inside the room. In case the air filter is full of dust, the air flow
will decrease and the cooling capacity will be reduced. Further, noise may occur. Be sure to clean the
filter following the procedure below.

!

CAUTION

1

Open the front panel and remove the filter

● Gently lift and remove the air cleansing and

deodorizing filter from the air filter frame.

2

Vacuum dust from the air filter and air cleansing
and deodorizing filter using vacuum cleaner. If
there is too much dust, rinse under running tap
water and gently brush it with soft bristle brush.
Allow filters to dry in shade.

3

● Re-insert the air cleansing and deodorizing

filter to the filter frame. Set the filter with
“FRONT” mark facing front, and slot them into
the original state.

● After attaching the filters, push the front panel

at three arrow portions as shown in figure
and close it.

!

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 use detergent on the air cleansing and deodorizing filter as some detergent may deteriorate

the filter electrostatic performance.

PROCEDURE

NOTE:

● Air cleansing and deodorizing filter should be cleaned every month or sooner if noticeable loading

occurs. When used overtime, it may loose its deodorizing function. For maximum performance, it is
recommended to replace it every 3-6 months depending on application requirements.

– 27 –

2. Washable Front Panel

● Remove the front panel and wash with clean

water.
Wash it with a soft sponge.

After using neutral detergent, wash thoroughly
with clean water.

● When front panel is not removed, wipe it with

a soft dry cloth. Wipe the remote controller
thoroughly with a soft dry cloth.

● Wipe the water thoroughly.

If water remains at indicators or signal
receiver of indoor unit, it causes trouble.

Method of removing the front panel.
Be sure to hold the front panel with both hands
to detach and attach it.

!

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.

Removing the Front Panel

● When the front panel is fully opened with

both hands, push the right arm to the inside
to release it, and while closing the front panel
slightly, put it out forward.

Attaching the Front Panel

● Move the projections of the left and right

arms into the Flanges in the unit and
securely insert them into the holes.

Projection

Flange

Hole

3. MAINTENANCE AT BEGINNING OF LONG OFF PERIOD

● Run the unit by setting the operation mode to

(FAN) and the fan speed to HI for about half a day
on a fine day, and dry the whole of the unit.

● Switch off the power plug.

Air

Blow

– 28 –

Cleaning and maintenance must be carried out only by qualified service personal. Before cleaning,
stop operation and switch off the power supply.

!

CAUTION

Confirm

1

2

3

REGULAR INSPECTION

PLEASE CHECK THE FOLLOWING POINTS BY QUALIFIED SERVICE PERSONAL EITHER
EVERY HALF YEARLY OR YEARLY. CONTACT YOUR SALES AGENT OR SERVICE SHOP.

Is the earth line disconnected or broken?

Is the mounting frame seriously affected by rust and is the
outdoor unit tilted or unstable?

Is the plug of power line firmly plugged into the socket?
(Please ensure no loose contact between them).

CAUTION

● 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.

IMPORTANT

The wires in this mains lead are coloured in accordance with the following code:

Green-and-yellow : Earth
Blue : Neutral

Brown : Live
As the colours of the wires in the mains lead of this appliance may not correspond with the coloured
markings identifying the terminals in your plug, proceed as follows:
The wire which is coloured green-and-yellow must be connected to the terminal in the plug which is
marked with the letter E or by the earth symbol or coloured green or green-and-yellow.
The wire which is coloured blue must be connected to the terminal which is marked with the letter N
or coloured black.
The wire which is coloured brown must be connected to the terminal which is marked with the letter
L or coloured red.

NOTE

If the supply cord is damaged, it must be replaced by the special cord obtainable at authorized service/
parts centers.

– 29 –

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”?

● Was the air filter cleaned?

● 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?

CONDITION CHECK THE FOLLOWING POINTS

Notes

● In quiet operation or stopping the 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

Minimum Maximum

Indoor Dry bulb °C21 32

Wet bulb °C15 23

Outdoor Dry bulb °C21 43

Wet bulb °C15 26

Note

● Avoid to use the room air conditioner for cooling operation when the outside temperature is below

21°C (70°F).
The recommended maximum and minimum operating temperatures of the hot and cold sides
should be as below:

Please note:
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.

– 30 –

BA

L
N

B
A

Indoor Unit

Outdoor Unit

Connecting
Cord

Line
cord

CONSTRUCTION AND DIMENSIONAL DIAGRAM

MODEL RAS-07G4/09G4/14G4

Note:

1. Servicing space of 100mm or more is required on the left and right sides of the indoor unit and also 50mm or
more space is required above the unit

2. Insulated pipes should be used for both the narrow and wide dia. pipes.

3. Piping length is within 15m (RAS-14G4), 10m (RAS-07G4/RAS-09G4)

4. Height different of the piping between the indoor unit and the outdoor unit should be within 5m.

5. Power supply cord length is about 2m

6. Connecting cable 2.5mm2 dia. x 3 is used for the connection.

Power cord

Connecting cord

Drain hose

Approx 370 Approx 70 Narrow pipe (06.35)

Wide pipe (09.52)

Mounting plate

210

780

280

50

Discharge grill

Top air suction grill

50

47

205

Top air suction grill

Front panel

Approx 108

Drain pan

Drain cap connection port

H-deflector

Indoor unit service space

47

(190)

400

400 (190)

7070

60

30 60

22 60 81.5

47

V-deflector

47

5

60

11

5

When piping is
drawn horizontally,
exchange the drain

hose for the drain cap

147

56 17.5

About 380

About 350

View from back
(Pipe lead-out)

– 31 –

MODEL RAC-07G4 / RAC-09G4

MODEL RAC-14G4

Air outlet

Handle

Air inlet

(18)

490

Handle

Viewed from P

157

245

225

8

10

500

35

12

16

55

570

428

700

243

53

236
210 10

482

517

135

75

77

P

500

12

37

124

57

16556

28 750

852

76

570

95

166

559

2616 280

195

280

15

10

340

340

10

320

– 32 –

MAIN PARTS COMPONENT

THERMOSTAT

Thermostat Specifications

FAN MOTOR

Fan Motor Specifications

TEMPERATURE
°C (°F)

INDICATION

16

INDICATION

24

INDICATION

32

MODEL RAS-07G4/09G4/14G4

THERMOSTAT MODEL IC

OPERATION MODE

ON

OFF

ON

OFF

ON

OFF

COOL

16.6 (61.9)

16.0 (60.8)

24.6 (76.3)

24.0 (75.2)

32.6 (90.7)

32.0 (89.6)

CONNECTION

MODEL RAS-07G4/09G4/14G4

RAC-07G4/09G4/14G4

PHASE

RATED VOLTAGE

– – – – –

SINGLE

RATED FREQUENCY

DC35V

220-240V

OUTPUT

POLE NUMBER

– – – – –

6

20 W

20W 30W 30W

– – – – –

50 Hz

35V

5V

RED

YELLOW

BLUE

M

BLACK

CAPACITOR

RA

RED

INTERNAL
THERMAL FUSE

GRAY

RM

RESISTANCE VALUE

( )

20°C

75°C

– – – – –

– – – – –

RM = 355.1

RA = 252.6

RM = 250.3

RA = 171.1

RM = 253.0

RA = 173.4

RM = 431.9

RA = 307.1

RM = 304.4

RA = 208.1

RM = 307.7

RA = 210.9

– 33 –

!

CAUTION

When the Air Conditioner has been operated for a long time with the capillary tubes clogged or crushed or
with too little coolant, check the color of the refrigerant oil inside the compressor. If the color has been
changed conspicuously, replace the compressor.

MODEL RAC-07G4/09G4/14G4

COMPRESSOR MODEL 5RS080 5PS112 5PS132

PHASE SINGLE

RATED VOLTAGE 220 – 240 V

RATED FREQUENCY 50 Hz

LOCKED ROTOR CURRENT 45 A

POLE NUMBER 2

COMPRESSOR MOTOR

Compressor Motor Specifications

CONNECTION

20°C

(68°F)

75°C

(167°F)

( )

RESISTANCE VALUE

RM = 5.233

RA = 5.621

EXTERNAL OVERLOAD RELAY

INTERNAL PROTECTOR

YES

NO

ORANGE

RM

WHITE

RA

RED

CAPACITOR

S (RED)

C (WHITE)

M OR R
(ORANGE)

RAC-07G4 / RAC-09G4 / RAC-14G4

RM = 2.826

RA = 5.413

RM = 3.192

RA = 4.621

RM = 6.364

RA = 6.836

RM = 3.437

RA = 6.583

RM = 3.882

RA = 5.620

– 34 –

WIRING DIAGRAM

MODEL RAS-07G4/09G4/14G4//RAC-07G4/09G4/14G4

TERMINAL BOARD

– 35 –

CIRCUIT DIAGRAM

Remote Control

1
2
3
4
5
6
7
8

10
11

13
14
15
16
17

19
20

9

12

18

SEG19
SEG18
SEG17
SEG16
SEG21

SEG24

SEG25

SEG26
SEG27
SEG28

NC
NC
NC
NC
NC
NC
NC
NC
NC

SEG20

SEG5
SEG0
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
COM3
COM2
COM1
COM0
SEG14
SEG13
SEG12
SEG11
SEG13
SEG9
SEG8

40
39
38
37
36
35
34
33

31
30

28
27
26
25
24

22
21

32

29

23

40
39
38
37
36
35
34
33

31
30

28
27
26
25

32

29

64

63

62

61

60

59

58

57

56

55

54

53

52

51

50

49

48 47

46

45

44

43

41

42

65
66
67
68
69
70
71
72

74
75

77
78
79
80

73

76

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

24

23

SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31
SEG32
SEG33
SEG34
SEG35

SEG19

SEG18

SEG17

SEG16

SEG15

SEG14

SEG13

SEG12

SEG11

SEG10

SEG9

SEG8

SEG7

SEG6

SEG5

SEG4

SEG3

SEG2

SEG1

SEG0

SEG43

SEG42

SEG41

SEG40

P40

P41

P42

P43

P00

P01

P02

P03

P10

P11

P12

P13

D0

D1

D2

D3

D4

D5

D6

D7

D8

D9

BEEP

P20

P30
P31

NCVL C1

VL C2
VL C3

XC IN

XC OUT

VDD

X OUT

X IN

RESET

CARR

P23

P22
P21

VSS

IC 1
M3455OM6A-510FP

LCD 1

C8

50v/1u

K 1

D3

RB425D(1/2)

K2K3

K4

K5

P10

P11

P12

K6

K7 K8

K8 K10

K11K12

K18

K17

K15 K16

K13 K14

D0

D1

D2

D3

R1

100k

SW1

R2

P

100k

R3

100k

R4

100k

R5

Q1

2SC3443

or 2SC2982

R6

R7

R9

D2D1

D1 D2

EL-1L7

D3

(1/2)

RB425D

R10
12M

K19

X1

C9

R11

R15

R16

R13

R14

910kHz

105

104

104

150k

X2

kHz

C4

C5

C6

C7

18p

22p

R12
220k

220K

220k

100k

100k

32.768

C1

C2

C3

220p

220p

334

R6 R9

24(1/8W)

R8

330

SW-187-2P

Key matrix table

P10

Input

Output

D0 D1

D2

D3

P11

P12

Door open

Door shut

Door open

Door shut –

Off timer –

Sleep –

On timer

Hour up

Start/Stop Super silent cooling

Start/Stop

Room temperature up

Operation selection

Reservation

–

Hour down

–

Room temperature down

Fan speed selection

Super cooling

Cancel

–

Day

•

present time

–

Automatic swing

Door open

Door shut

– 37 –

PRINTED WIRING BOARD LOCATION DIAGRAM

MODEL RAS-07G4/09G4/14G4

– 39 –

BLOCK DIAGRAM

MODEL RAS-07G4/09G4/14G4//RAC-07G4/09G4/14G4

INDOOR UNIT

POWER SUPPLY

POWER RELAY

DC FAN MOTOR

OPERATION CIRCUIT

WIRELESS REMOTE

CONTROLLER

ROOM TEMPERATURE

THERMISTOR

HEAT EXCHANGER

THERMISTOR

WIRELESS RECEIV-

ING CIRCUIT

INDOOR

FAN MOTOR

OUTDOOR UNIT

COMPRESSOR

RELAY POWER RELAY

BUZZER CIRCUIT

OPERATION

TIMER

FILTER

INDICATION

LAMP

AUTO SWEEP MOTOR 1

MICROCOMPUTER

CLOCK CIRCUIT

INITIALIZING

CIRCUIT

RESET

CIRCUIT

MICROCOMPUTER

(AX-3U)

M

FM

M

OUTDOOR

FAN MOTOR

FM

– 41 –

-1

-2

-3

-4

0.66 deg

0.33 deg

Set temperature

ON/OFF Switch
Fan Speed L

Power relay
Stick relay
Operation lamp

30 sec

2 sec

2 sec

Dry lamp

30 sec

+3
+2
+1

-1

-2

-3

Set temperature

ON / OFF Switch
Fan Speed L

Power relay
Stick relay
Operation lamp

L L L

30 sec

Dry lamp

30 sec

2 sec 2 sec2 sec

On / Off switch

On / Off switch

Fan Speed

Fan Speed

Stick relay

Stick relay

ON / OFF switchON / OFF switch

Operation lampOperation lamp

Operation and stop are repeated independent of timer reservations

ON / OFF switchON / OFF switch
ReservationReservation
CancelCancel
Operation lampOperation lamp
Timer lampTimer lamp
Timer memoryTimer memory

(OFF timer during stop)(OFF timer during stop) (Cancel)

(Change of the reservation time)

ON / OFF switchON / OFF switch
ReservationReservation
CancelCancel
Operation lampOperation lamp
Timer lampTimer lamp
Timer memoryTimer memory

(ON timer during operation)(ON timer during operation)

(Cancel)(Cancel)

(Change of the reservation time)(Change of the reservation time)

ON / OFF switchON / OFF switch
ReservationReservation
CancelCancel
Operation lampOperation lamp
Timer lampTimer lamp
Timer memoryTimer memory

(OFF ON timer)(OFF ON timer) (ON OFF timer)(ON OFF timer)

(ON OFF timer during operation)(ON OFF timer during operation)

(OFF ON timer during stop)(OFF ON timer during stop)

PM1:00 PM3:00 PM5:00PM1:00 PM3:00 PM5:00

PM1:00 PM3:00 PM5:00PM1:00 PM3:00 PM5:00 PM1:00 PM3:00 PM5:00PM1:00 PM3:00 PM5:00 PM1:00 PM3:00 PM5:00PM1:00 PM3:00 PM5:00

Operation mode

Control function

Fan Cooling Sensor dehumidification Circulation Automatic

1

ON / OFF switch,
basic mode

2

Timer
operation

ON timer

OFF timer

OFF

→

ON

timer

Automatic

MED

LO

HI

•

Operation in “HI” mode

•

Operation in “MED” mode

•

Operation in “LO” mode

•

Same as on the left.

•

Same as on the left.

•

Same as on the left.

•

Only circulation with cut
velocity is executed,
independent of the
thermostat signal.

(1) Strong

3

Fan speed
mode

Thermostat operation
H

→

HI

M

→

MED

L

→

LO

• The power relay is
delayed by 2 seconds
from the start of
thermostat.

(1) In case of “Automatic” mode

Note:

•

The min. ON time of the power relay
is 3 minutes, and the min. OFF time
also is 3 minutes.

(2) In other modes than “Automatic”

Same as above (but operation is
made with the velocity set at the
time of operation start).

•

“HI”, “MED”, or “LO” operation is

executed according to the thermostat
signal. (Refer to “Thermostat operation”.)

→

•

“LO” and “Stop” are repeated according to the thermostat

signal, independent of the setting.

Notes:

•

Forced operation by ON / OFF
button ON is executed even
with thermostat OFF.

•

The room temperature 30 sec
after operation start, minus

0.66 deg, becomes the set
temperature.

• When the room temperature
is 16°C or lower, 16°C
becomes the set temperature.

• The other operations are the
same as for (1).

•

Repetition of “HI” and “Stop” by means of thermo signal and time.

•

Repetition of “MED” “Stop” by means of thermo signal and time.

•

Repetition of “LO” “Stop” by means of thermo signal and time.

•

The “Automatic” speed mode for
each operation mode is used
independent of the setting.
(“LO” at the time of “ Sensor
dehumidification”.)

•

The operation mode at the start
of operation differs as shown
below according to the room
temperature.

Notes

• A shift is not accepted at the
time of operation start.

• There is no switching between
modes after start of operation.

• When the operation is started
again within 20 hours after stop
with the ON / OFF button,
operation will be executed in the
previous mode.

• The operation details are the
same as for each operation
mode.

• The set temperature is set with
the room temperature adjustment
button. Correction by V, ±3°C is
possible with. At this time, the
operation mode judgement
temperature also is shifted at the
same time. However, correction
is possible only in cooling
operation mode, but not in
“Sensor dehumidification” mode.

(2) Set temperature is higher than room temperature.

(1) When the set temperature is lower than the room temperature.

4

BASIC MODE

MODEL RAS-07G4/09G4/14G4//RAC-07G4/09G4/14G4

Notes:

•

The min. ON time of the power relay is 3 minutes, and the min.
OFF time also is 3 minutes.

• The indoor fan is not delayed with operation start by ON / OFF
button.

Cooling The set temperature

shall be 27°C.

Sensor The set temperature
dehumidi- shall be 2 degrees
fication below the room

temperature at the
start of operation.

No.

Room temperature

at the start of

operation

→

→

+3
+2
+1

-1

-2

-3

Set temperature

ON / OFF Switch

ON / OFF Switch

Fan Speed H
Fan Speed M
Fan Speed L

Power relay

Stick relay

Operation lamp

H L M L M H L

L M M

L M M

2 sec 2 sec 2 sec

2 sec

+3
+2
+1

-1

-2

-3

Set temperature

ON / OFF Switch
Fan Speed L

Stick relay

Operation lamp

L L L L

❈ Both operation lamp and Dry lamp light during Sensor

dehumidification at operation mode.

Control function

Operation mode

Fan Cooling Sensor dehumidification Circulation Automatic

•

The operation is switched OFF at the set time.

•

Sleep operation is executed for each
operation mode.

5

•

The operation is
switched OFF
at the set time.

No.

Sleep mode

•

The set temperature
after sleep shift in
sensor dehumidification
operation is limited
by 16°C.

Notes:

•

60 minutes after the sleep key is switched on, sleep operation is started.

•

When the sleep key is switched on during OFF timer operation, the OFF timer will be canceled.

•

The sleep operation is started when the sleep key is “ON” after timer reservation.

Set circulation velocity

Set temperature

ON / OFF Switch

Timer reservation

Sleep mode

Operation lamp

Timer lamp

60 minutes

2 deg up

Low (sleep operation)

– 43 –

91.5

Vertical positioning
90 in down direction

91.5 in up direction

32

Vertical positioning
90 in down direction

32 in up direction

52.5

Down

Up

52.5 in up direction

❈ 90 in down direction

❈ Swing start direction

52.5

Down

(52.5 in up direction)

Up

● The air deflector control operation shown below is done when the swing switch is

pressed or when the operation mode is changed.

● The air deflector control operation shown below is done when the operation switch

is turned off after the filter sign lamp is lit.

Item

3-way AUTO (Swing)

Specification

Cooling/
dehumidi­fying

Air
blowing
direction
control

8

The same as cooling ● dehumidifying

Other detailed specifications

1. When the room temperature starts to
increase within 3 minutes after thermo
OFF in “cooling” and fan speed “AUTO”,
the fan speed changes L

→

M → H as

when thermo ON.

2. If “cooling” is selected during “sensor
dehumidification” operation the operation
continues as it is with the thermo ON.
The 3 minutes delay is not started. The
set temperature and fan speed depend
on the remote control signal.
It is same for “cooling” – – – – “sensor
dehumidification”. It is same for “AUTO”
sensor dehumidification cooling “sensor
dehumidification” “cooling”.

3. The filter sign lights after 100 hours
operation of the room fan. The time is
cleared when power switch set to OFF
and ON again.

4. After the failure mode is started (indicator
lamp flickering), rapid mode changing
cannot be done.

5. If the operation is made by the nice
temperature reservation during the sleep
operation, the normal operation
continuously occurs, and for the advance
time, the temperature difference between
the set temperature without sleep shift
and “room temperature” is used.

– 45 –

● Operation starts in advance so that the room temperature reaches

the preset value at the set time.

● The operation time is obtained as follows depending on the room

temperature when operation starts.

(1) Calculation method of the moved-up time.

Moved-up time (MT) = Moved-up time depending on the temperature
difference (OT) + compensation time (HT).
MT is at least 5 minute if OT is not zero.

Cooling

(MT) 00 ~ 60 min.

(OT) 00 ~ 60 min.

(HT) –60 ~ 60 min.

Obtain OT (moved-up time depending on the temperature difference)
from the table below.

6

“NICE
TEMPERA­TURE”
reservation

Cooling

Setting temp.–Room temp. Time (min.)

00.00 – 02.00 00

02.25 – 05.00 15

05.25 – 08.00 30

08.25 – 11.00 45

11.25 – 60

❈ The preset temperature value shown above does
not include any shift value.

(2) Compensation

1 The “Attained” state is monitored and a “Not attained” check is

done to revise the compensation time (HT).

“Attained” monitor

Continuously monitored during “NICE TEMPERATURE” operation.

(Cooling)

When the room temperature < Set value + compensation shift, it
is regarded to be “attained” and 5 minutes are reduced from the
cooling compensation time.

“Not attained” check

Performed once when the “NICE TEMPERATURE” timer is completed.

(Cooling)

When the room temperature > Set value + compensation shift
+1°C, it is regarded to be “Not attained” and 5 minutes are added
to the cooling compensation time.

❈ If the room temperature is within +1°C from the set value +

compensation shift, compensation is not done.

Item

ON temperature

Thermostat operation (Thermostat relay)

power relay (°C)

Differential (°C)

Low-temperature defrosting

Cooling, sensor
dehumidification

(T1)

16 17.6
24 25.6
32 33.6

0.33
ON (°C) 4.0
Reset (°C) 12.0

Table 2 Sensor operation values

Item RAS-07G4/09G4/14G4

Automatic Yes
Circulator Yes

Operation switching Sensor dehumidification Yes

Cooling Yes

Fan Yes
Temporary switch Yes (automatic)
Service switch Cooling Yes
Nice temperature reservation Yes
Defrosting No
Sleep circuit Yes
Heater operation at the time of sensor dehumidification No
Automatic blowing direction Yes
Filter sign Yes
Wireless mode Cooling

Table 1 Specifications

RAS-07G4/09G4/14G4

Circulator

(When the
operation
switch is
turned off
after the
filter sign
lamp
lights.)

– 47 –

REFRIGERANT CYCLE DIAGRAM

MODEL RAS-07G4/RAC-07G4

2S—VALV E

STRAINER

HEATING &
COOLING
CAPILLARY

STRAINER

CHARGING
PIPE

COMP

CONDENSER

REVERSING
VALV E

S — TANK

3S — VALV E

EVAPORATOR

MODEL RAS-09G4/RAC-09G4

COMP

CONDENSER

REVERSING
VALV E

HEATING
CAPILLARY

STRAINER

CHARGING
PIPE

CHECK VALVE

STRAINER

HEATING &
COOLING
CAPILLARY

S-TANK

3S-VALVE

2S-VALVE

EVAPORATOR

– 48 –

MODEL RAS-14G4/RAC-14G4

HEATING
CAPILLARY

STRAINER

CHARGING
PIPE

HEATING &
COOLING
CAPILLARY

EVAPORATOR

2S — VALV E

3S — VALV E

S — TANK

COMP

CONDENSER

REVERSING
VALV E

ACCUMULATOR

STRAINER

CHECK VALVE

– 49 –

DESCRIPTION OF MAIN CIRCUIT OPERATION

1. ON / OFF

The “ON / OFF” and “Timer reserve button” and “Sleeping” function independently. Their
operations are shown in Fig. 1-1.

ON/OFF button

Timer reserve button
(Sleeping)

Operation lamp

Timer lamp

When OFF
timer
(sleeping)
is set

Start Stop Start

"OFF" time

When ON
timer is set

"ON" time

ON/OFF button

Timer reserve button

Operation lamp

Timer lamp

Stop

Start

Fig. 1-1 Timer operation

– 50 –

2. Reset Circuit

● The reset circuit is used to reset the program to its initial settings when the power is turned on or when the

power is recovered after a power failure.

● The micro computer is reset when the reset input is “Hi”, and operation is possible when the reset input is

“Lo”.

● The waveforms at each point when the power is turned on and off are shown in the diagrams.

● When the power is turned on, the voltages of the DC 12V line and DC 5V lines are increased. When the

voltage of DC 12V lines reaches about 7V, ZD201 is turned ON, the potential of Q201’s base rises and Q201
is turned ON. Since Q201’s collector is set to “LO” at this time, Q202 is turned OFF and the reset input of
the micro computer is set to “Lo”. The DC 5V line voltage has already become 5V at this time and the micro
computer starts operation.

● When the power is turned OFF, the voltage of the DC 12V line decreases. When it becomes about 7V, ZD201

is turned OFF, then Q201 is turned OFF, Q202 is turned ON the reset input of the micro computer is set to
“Hi’ and the micro computer is set to the reset mode.

POWER ON

12V

7V

5V

DC12V Line

DC5V Line

Base

POWER OFF

5V

Micro computer
Pin 17

12V

5V

0V

0V

Q201

C202

17

Micro computer

(AX-3U)

RES

Q202

R201

R205

ZD201

R204

R202

R203

—

+

C201

– 51 –

4. Initial setting (IC401)

The pre-heating operation start value, ratings of the compressor, maximum rotation speed, etc. are preset in
the micro computer.

87

IC401

(E

2

PROM)

65

5V

Micro computer

(AX-3U)

58

59

C401

R404

R403

12 4

0V

3

3. Buzzer Circuit

Fig. 3-1 Buzzer Circuit

Sound wave

Metal diaphragm

V

Pizoelectric element

V

Fig. 3-2 Buzzer Operation

Micro computer

(AX-3U)

Buzzer output

BZ1

12V

0V

R801

Q302

21

B.Z

● When the buzzer sounds, an approx.

3.9kHz square signal is output from
buzzer output pin q of the micro
computer. After the amplitude of this
signal has been set to 12Vp-p by a
transistor, it is applied to the buzzer.
The piezoelectric element in the
buzzer oscillates to generate the
buzzer’s sound.

– 52 –

6. Service Operation Circuit

● Use the service switch to select “Cooling” temporarily when the interior electric equipment has troubled.

● Setting the switch to “Cooling” causes continuous cooling room temperature control. To control the room

temperature, turn on and off the disconnect switch. To protect the compressor, wait at least 3 minutes
before turning on again.

● The fan speed is “MED”.

● Does not operate is 12V is not generated in the control circuit.

● When the service switch is used for operation, each change switch is overridden.

● Setting the service switch to “Cooling” turns on the “Power relay”.

Micro computer

(AX-3U)

FORCE COOL 33

5V

0V

R614

R629

C602

R630

Cool
Normal

0V

5. Receive circuit

Infrared signals from the wireless remote controller are received by the light receiving unit and output after
being amplified and shaped.

R211

R209

C702

ZD701

0V

0V

R212

R141

Q141

Receiver

Unit

12V

18

Micro computer

(AX-3U)

WIRELESS I/P

– 53 –

7. Auto Sweep Motor Circuit

Micro computer

(AX-3U)

48

49

50

51

1

2

3

4

8

16

IC501

12V

CN12

Auto sweep motor for
horizontal air deflectors

Rotor

0V

15

14

13

1

2

3

4

5

Fig. 7-1 Auto Sweep Motor Circuit (Horizontal air deflectors)

● Fig. 7-1 shows the Auto sweep motor drive circuit; the signals shown in Fig. 7-2 are output from pins

k – A

of the micro computer.

Micro computer pins

Step width

Horizontal air

deflectors: 10ms.

12345678

Horizontal air deflectors

51

50

49

48

Fig. 7-2 Micro computer Output Signals

● As the micro computer’s outputs change as shown in Fig. 7-2, the core of the auto sweep motor is excited

to turn the rotor. Table 7-1 shows the rotation angle of horizontal air deflectors.

Rotation angle per step (° )

0.0879

Time per step (ms)

10Horizontal air deflectors

Table 7-1 Auto sweep Motor Rotation

– 54 –

8. Room Temperature Thermistor Circuit

● Fig. 8-1 shows the room temperature

thermistor circuit.

0V

Room
temperature
thermistor

0V

5V

Fig. 8-1

A

R309

C302

Micro
computer
(AX-3U)

Room
Thermistor

R310

0V

0V

Heat exchanger
temperature thermistor

0V

5V

Fig. 9-1

A

R307

C301

Micro computer

(AX-3U)

Hex
Thermistor

R308

R304

Q301

5

4

3

2

1

0

010

Room temperature (ßC)

Fig. 8-2

20 30 40

Voltage at

(V)A

5

4

3

2

1

0

010

-10

Heat exchanger temperature (ßC)

Fig. 9-2

20 30 40

Voltage at

(V)A

3

4

9. Heat exchanger temperature thermistor circuit

● The voltage at A depends on the room

temperature as shown in Fig. 8-2.

● The circuit detects the indoor heat

exchanger temperature and controls
the following.

(1) Low-temperature defrosting during

cooling and dehumidifying
operation.

The voltage at A depends on the heat
exchanger temperature as shown in
Fig. 9-2.

– 55 –

10. Temporary Switch

● The temporary switch is used to operate the air conditoner temporarily when the wireless remote control

is lost or faulty.

● The air conditioner operates in the previous mode at the previously set temperature. However, when the

power switch is set to OFF, it starts automatic operation.

Fig. 10-1

11. DC Fan Motor Drive Circuit

● Fig. 11-1 shows the indoor DC fan motor drive circuit.

Fig. 11-1

● The circuit produces the fan motor drive voltages, 8-33V, from 35V DC supplied from the outdoor unit and

controls the fan motor speed.

● Q901 is switched on and off according to the signal at fan PWM output pin

J

to control the voltage which

is smoothed by D902, L901 and C901 to drive the fan motor.

● The output voltage is divided by R919 and R920 and is input to divided voltage output pin

8

; the micro
computer controls the fan PWM output so the output voltage is set to the specified value. The chopper
frequency of the fan PWM output is 15.7kHz.

● In the Fan current detection circuit, 35V line current is detected by R906 and input to fan current detection

pin 9. Microcomputer detects overcurrent comparing it with the current judgment value corresponding to
the fan rotation speed.

TELECON

(AX-3U)

C601

TEMPORARY SWITCH

SW1

5V

0V

R609

MICRO COMPUTER

MICRO COMPUTER

(AX-3U)

FAN PWM
OUTPUT

FAN PWM
FEEDBACK

R916

5V

5V

Q903

35V

ICP2

Q901

Q902

R911

R913

R914

R915

R917

R906

L901

R912D901

RED

YEL

BLU

CN3M PIN NO.

D902 C901 R919

R920

57

C932

0V 0V

0V

0V

0V

0V

0V

R931

R932

R930

D904

FAN CURRENT
DETECTION

I

J

M

8

9

5
4

3
2
1

C942

CN10

Indoor DC
Fan motor

3

31

– 56 –

PWM output

Output voltage

Voltage at I

Voltage at J

Fig. 11-2

– 57 –

INPUT SIGNAL

OPERATING SPECIFICATION

REFERENCE

OPERATION OPERATION MODE AIR DEFLECTOR

PRESENT CONDITION

KEY INPUT

INTERNAL FAN

ON

(THERMO. ON)

INTERNAL FAN

OFF

(THERMO. OFF)

MAIN SWITCH

ON

MAIN SWITCH

OFF

CHANGE OF

OPERATION

STOP

DURING

OPERATION

DURING

OPERATION

STOP

DURING

OPERATION

DURING

OPERATION

EACH MODE

AUTO COOL

COOL

FAN

AUTO DRY

DRY

CIRCULATOR

AUTO DRY

DRY

CIRCULATOR

COOL

FAN

DRY

CIRCULATOR

EACH MODE

EACH MODE

STOP SWINGING AND MODE BECOMES INITIALIZING

CONDITION.

INITIALIZING CONDITION OF EACH MODE.

ONE SWING (CLOSING AIR DEFLECTOR)

1 DOWNWARD

2 UPWARD

INITIALIZE

1 DOWNWARD

INITIALIZE

1 DOWNWARD

2 UPWARD

STOP AT THE MOMENT.

START SWINGING

1 DOWNWARD

2 UPWARD

3 DOWNWARD

STOP AT THE MOMENT.

START SWINGING

1 DOWNWARD

2 UPWARD

3 DOWNWARD

STOP AT THE MOMENT.

ONE SWING (CLOSING AIR DEFLECTOR)

1 DOWNWARD

2 UPWARD

INITIALIZE AT NEXT

OPERATION.

INITIALIZE AT NEXT

OPERATION.

STOP

DURING ONE SWING

STOP

DURING SWINGING

STOP

DURING SWINGING

TEMPORARY STOP

DURING SWINGING

STOP

DURING ONE SWING

STOP

DURING ONE SWING

STOP

DURING SWINGING

DURING

INITIALIZING

STOP

DURING SWINGING

AUTO SWING FUNCTION

STOP SWINGING TEMPORARILY.

(SWING MODE IS CLEARED IF SWING COMMAND IS

TRANSMITTED DURING TEMPORARY STOP.)

START SWING AGAIN.

– 58 –

SERVICE CALL Q & A

While cooling, the
compressor sometimes stops
abruptly.

Q1

Check whether frost sticks
on the heat exchanger of in­door unit or not.
Wait for 3 – 4 minutes until
the frost melts.

A1

If cooling is performance
when the room temperature
is low, frost may stick on the
heat exchanger of indoor
unit.

Cooling operation

The fan speed does not
change during a
dehumidifying operation.

Q2

Dehumidifying operation

The fan speed is always LO
at a dehumidifying operation.

A2

Cold air comes out during a
dehumidifying operation.

Q3

To improve the dehumidi­fication efficiency, LO fan
speed operation is
performed. Therefore the air
is cold. This is not a trouble.

A3

The operation does not stop
even by raising the room
temperature setting of remote
control at a dehumidifying
operation.

Q4

At a dehumidifying operation,
the actual room temperature is
compared with the room tem­perature setting when starting
the operation and the opera­tion is as follows.

1) When actual room tem­perature > room tempera­ture setting.
The operation is according
to the room temperature
setting on the remote con­troller.

2) * When actual room tem­perature < room tempera­ture setting
Regardless of the room
temperature setting, the
temperature is automati­cally set slightly lower than
the room temperature.

In this case, the status is as 2)
and, therefore, the operation
by the room temperature
control is impossible. Turn off
the On / OFF switch, set the
room temperature to a new
value and turn on the opera­tion by the On / Off switch.

A4

In the dehumidifying mode,
the temperature set by
remote controller is set
slightly higher than the room
temperature but the
operation starts.

Q5

This is the status in 2) of
(A4). The temperature is set
a little lower than the room
temperature to carry out a
dehumidifying operation as
far as possible.

A5

– 59 –

How is the automatic
operation mode determined?

Q6

According to the room
temperature, cooling or
dehumidifying operation is
automatically selected.

Cooling:

When room temperature
is approx. 27°C or higher

Dehumidifying:

When room temperature
is between approx. 23°C
and 27°C

A6

Automatic operation

At an automatic operation,
changing the fan speed
change switch does not vary
the fan speed.

Q7

The fan speed is automati­cally determined.

A7

The room temperature
cannot be controlled at an
automatic operation.

Q8

It is automatically set as
follows.

At cooling: Set at 27°C

At dehumidifying:

Set slightly
lower than room
temperature

The room temperature
setting can be raised 3°C by
“ ” or lowered 3°C by “ V ”.

A8

When changing the room
temperature setting in an
automatic operation, the next
automatic operation mode is
determined by new room
temperature setting.
If, for example, the room
temperature setting is 2°C
lowered for example, the
operation mode is as follows.

Cooling : When room

temperature is
approx. 25°C or
higher

Dehumidifying :

When room
temperature is
between approx.
21°C and 25°C

V

– 60 –

There is a difference
between the room
temperature setting and
actual room temperature.

Q9

There may be a difference
between the room
temperature setting and
actual room temperature on
account of the room
structure, air flow, etc.
If there is a difference from
the room temperature, adjust
the set temperature to keep
living space at a comfortable
temperature.

A9

Common, etc.

What will happen if the time
setting is changed while in a
timer operation?

Q10

A timer operation is
performed until the time after
changing the time setting.

A10

In the “Automatic fan speed”
mode, the indoor fan
changes to MED and LO fan
speed.

Q11

It is not a trouble. The cold
wind preventive function
operates.

A11

Set the temporary switch
normal.

In case of “ON” timer, the operation does not
start at a preprogrammed time but a little
earlier.

Q12

Nice temperature reservation

The “Nice temperature reservation” functions.
The operation starts earlier so the room
temperature will be as set at a programmed
time.
The operation starts at most 60 minutes before
a preprogrammed time.

A12

The time to start an operation is irregular
while preprogramming at the same time.

Q13

The “Nice temperature reservation” operates.
The starting time depends on the room load.

A13

– 61 –

1) When the “Automatic”
operation mode is
selected, “Automatic”
does not change by
pressing the fan speed
select button.

2) The room temperature
setting is not displayed.

3) Pressing the room
temperature control button
develops transmit mark
“ ” and sounds a
receive sound but does
not display the room
temperature setting.

Q14

1) When the operation
mode is “Automatic”, the
fan speed is
automatically fixed to
“Automatic”.

2) At an “Automatic”
operation, the room
temperature setting is not
displayed.
The room temperature is
automatically set as
follows.

At cooling

Set at 27°C.

At dehumidifying

Set to a temperature
slightly lower than the
room temperature.

3) At an “Automatic”
operation, the room
temperature setting is not
displayed.
However, every pressing
“ ” or “ V ” button
changes 1°C within the
range of:
27±3°C when cooling.

A14

Wireless remote controller

The room temperature
sensing thermistor in the
indoor unit detects the room
temperature and, according
to the particular temperature,
automatically performs
“Cooling” or “Dehumidifying”
operation.
The value indicated not at an
“Automatic” but manual
operation is not the actual
room temperature but the
room temperature setting.

When the room temperature
setting is “16”, pressing the
room temperature control
button “ V ” causes no
transmission. At “32” ,
pressing “ ” causes no
transmission either.

Q15

The room temperature is
settable within the range of
16 - 32 and not beyond.

A15

The timer cannot be set.

Q16

Is the current time set?
The timer cannot be set
unless the clock is adjusted
correctly.

A16

V

The current time disap­pears soon.

Q17

The current time disappears
soon and the timer settting
indication takes a
precedence.

A17

When setting the current time,
its indication blinks for
approximately 3 minutes.

V

– 62 –

In spite of timer “Preprogram”,
the time setting is
extinguished.

Q18

Isn’t the time over the pre­programmed time?
As soon as the prepro­grammed time is reached, the
time setting disappears.

A18

After selecting a
“Dehumidifying” operation
mode, the fan speed mode
remains “LO” fan speed”.

Q19

At a “Dehumidifying”
operation, the “LO” fan speed”
is forcibly selected.

A19

– 63 –

TROUBLE-SHOOTING

No operation at all.
*1

*1 Before using the service switch,

disengage and engage the plug. Do not
operate the remote controller.

Check the following parts and replace if faulty

Remove and check the continuity across.1) Current fuse

2) Varistor

Check whether the appearance is blackish or not.
The resistance must be infinite. *2

No cooling

Power relay abnormal

YES

Check the continuity between contacts.3) Power switch

(102°C) Continuity across → If there is no continuity,
check the electric parts and replace if abnormal.

4) Thermal fuse for
Terminal board

*2 Before checking the varistor, detach a terminal.

NO

Operates by setting the service
switch to forced cooling?

Return the service switch to
"Normal".

Set the remote controller to an
operation status and press the ON/
OFF button.

Is the level LO (approx. 0.5V)
between driver IC501 pin

10

power

relay and 0V?

NO

Is voltage normal between Blue wire
and Red wire of Indoor DC Fan
Motor *3

NO

YES
Compressor does not turn at LO.

YES

Indoor fan motor or

Q903 abnormal

Replace Power relay

– 64 –

Is voltage normal (approx. 280 ~

380V) at out put side of the DB201?

Check the circuit board of

control board

YES

NO

Check the circuit board inside parts.
When checking, carry out a self
diagnosis by indoor indicator lamp.

Replace faulty part

*4 Wait for 3 minutes before forced

re-operation by the service switch.

Fan Speed

RAS-07G4
RAC-07G4

*3

CN6 BLUE-RED (V)

Cool

20.8

15.6

12.5

11.0

HI

MED

LO

SLEEP MODE

RAS-09G4
RAC-09G4

RAS-14G4
RAC-14G4

Cool

21.3

18.0

13.7

11.9

Cool

27.0

20.9

15.8

13.0

– 65 –

CAUTION

Remote control is disabled while the Timer lamp is flashing.
To check operation, turn off the power switch and turn it on again.

Timer-Lamp, break-down checking in blinking sign.

Check the break-down factor from the frequency of timer-lamp blinking.

No. Mode of Timer-Lamp blinking Indication Factor Estimated Break-Down Part

Force cooling operation

Unit is under forcible operation or
under balancing after forcible
operation.

Check force cooling switch at
indoor electrical.

IC 401 Data read wrongly

In case that data read from IC401
is wrong.

IC401 data is not in order.

Heat exchanger thermistor

error

Heat exchanger thermistor open
or short-circuit detected.

(1) Thermistor

(2) Indoor - control circuit board.

Room thermistor error

Room thermistor error open or
short-circuit detected.

(1) Thermistor

(2) Indoor - control circuit board.

1

2

3

4

5

( –– 0.5 second on, 0.5 second off.)

–– –– 15 times

––– 14 times

––– 13 times

––––––– 2 times

5

sec.

5

sec.

5

sec.

5

sec.

!

DC Fan motor - over flow of

electricity

Indoor - DC Fan motor has over
flow of electricity.

(1) Indoor - Fan is locked.

(2) Indoor - Fan motor damage.

(3) Indoor - control circuit board.

–– –– 10 times

5

sec.

– 66 –

PARTS LIST AND DIAGRAM

INDOOR UNIT
MODEL :

RAS-07G4 / RAS-09G4 / RAS-14G4

1

12

16

15

22

23 25

11

10

7

20

19

24

13

17

12

18

21

6

26

8

5

4

3

9

2

14

– 67 –

MODEL RAS-07G4

1 HWRAS-25YH4 901 1 CABINET

2 HWRAS-25YH4 940 1 MOUNTING PLATE

3 PMRAS-07GH4 001 1 FAN MOTOR

4 HWRAS-25YH4 907 1 TANGENTIAL FAN

5 HWRAS-25YH4 908 1 P-BEARING ASSY

6 HWRAS-25YH4 910 1 FAN MOTOR BASE

7 PMRAS-07GH4 002 1 CYCLE ASSY

8 HWRAS-25YH4 909 1 FAN COVER

9 HWRAS-25YH4 914 1 PIPE SUPPORT

10 HWRAS-25YH4 926 1 DRAIN PAN ASSY

11 HWRAS-25YH4 929 1 AUTO SWEEP MOTOR

13 HWRAS-25YH4 933 1 FRONT COVER ASSY

14 HWRAS-25YH4 936 1 FRONT PANEL

15 HWRAS-25YH4 937 1 AIR FILTER (R)

16 HWRAS-25YH4 938 1 AIR FILTER (L)

17 PMRAS-51CHA1 011 1 REMOTE CONTROL ASSEMBLY

18 PMRAS-10C3M 003 1 REMOTE CONTROL SUPPORT

19 PMRAS-10C8M 003 1 THERMISTOR SUPPORT

20 PMRAS-07CH2 012 1 THERMISTOR

21 HWRAS-25YH4 920 1 POWER SWITCH

22 PMRAS-07G4 001 1 P.W.B (MAIN)

23 PMRAS-N09S 004 1 P.W.B (POWER SW SUPPLY)

24 HWRAS-25YH4 916 1 TERMINAL BOARD (THERM-FUSE)

26 HWRAS-25YH4 939 1 LOW COVER

PART N0.

RAS-07G4

NO.

Q’TY / UNIT

PARTS NAME

– 68 –

MODEL RAS-09G4

1 HWRAS-25YH4 901 1 CABINET

2 HWRAS-25YH4 940 1 MOUNTING PLATE

3 PMRAS-07GH4 001 1 FAN MOTOR

4 HWRAS-25YH4 907 1 TANGENTIAL FAN

5 HWRAS-25YH4 908 1 P-BEARING ASSY

6 HWRAS-25YH4 910 1 FAN MOTOR BASE

7 PMRAS-07GH4 002 1 CYCLE ASSY

8 HWRAS-25YH4 909 1 FAN COVER

9 HWRAS-25YH4 914 1 PIPE SUPPORT

10 HWRAS-25YH4 926 1 DRAIN PAN ASSY

11 HWRAS-25YH4 929 1 AUTO SWEEP MOTOR

13 HWRAS-25YH4 933 1 FRONT COVER ASSY

14 HWRAS-25YH4 936 1 FRONT PANEL

15 HWRAS-25YH4 937 1 AIR FILTER (R)

16 HWRAS-25YH4 938 1 AIR FILTER (L)

17 PMRAS-51CHA1 011 1 REMOTE CONTROL ASSEMBLY

18 PMRAS-10C3M 003 1 REMOTE CONTROL SUPPORT

19 PMRAS-10C8M 003 1 THERMISTOR SUPPORT

20 PMRAS-07CH2 012 1 THERMISTOR

21 HWRAS-25YH4 920 1 POWER SWITCH

22 PMRAS-09G4 001 1 P.W.B (MAIN)

23 PMRAS-N09S 004 1 P.W.B (POWER SW SUPPLY)

24 HWRAS-25YH4 916 1 TERMINAL BOARD (FUSE)

26 HWRAS-25YH4 939 1 LOW COVER

PART N0.

RAS-09G4

NO.

Q’TY / UNIT

PARTS NAME

– 69 –

MODEL RAS-14G4

1 HWRAS-25YH4 901 1 CABINET

2 HWRAS-25YH4 940 1 MOUNTING PLATE

3 PMRAS-07GH4 001 1 FAN MOTOR

4 HWRAS-25YH4 907 1 TANGENTIAL FAN

5 HWRAS-25YH4 908 1 P-BEARING ASSY

6 HWRAS-25YH4 910 1 FAN MOTOR BASE

7 PMRAS-07GH4 002 1 CYCLE ASSY

8 HWRAS-25YH4 909 1 FAN COVER

9 HWRAS-25YH4 914 1 PIPE SUPPORT

10 HWRAS-25YH4 926 1 DRAIN PAN ASSY

11 HWRAS-25YH4 929 1 AUTO SWEEP MOTOR

13 HWRAS-25YH4 933 1 FRONT COVER ASSY

14 HWRAS-25YH4 936 1 FRONT PANEL

15 HWRAS-25YH4 937 1 AIR FILTER (R)

16 HWRAS-25YH4 938 1 AIR FILTER (L)

17 PMRAS-51CHA1 011 1 REMOTE CONTROL ASSEMBLY

18 PMRAS-10C3M 003 1 REMOTE CONTROL SUPPORT

19 PMRAS-10C8M 003 1 THERMISTOR SUPPORT

20 PMRAS-07CH2 012 1 THERMISTOR

21 HWRAS-25YH4 920 1 POWER SWITCH

22 PMRAS-14G4 001 1 P.W.B (MAIN)

23 PMRAS-N09S 004 1 P.W.B (POWER SW SUPPLY)

24 HWRAS-25YH4 916 1 TERMINAL BOARD (FUSE)

26 HWRAS-25YH4 939 1 LOW COVER

PART N0.

RAS-14G4

NO.

Q’TY / UNIT

PARTS NAME

– 70 –

7

10

9

11

5

4

15

14

17

18

12

16

6

50

30

31

51

13

3

1

2

PARTS LIST AND DIAGRAM

INDOOR UNIT
MODEL :

RAC-07G4 / RAC-09G4

52

– 71 –

MODEL RAC-07G4

2 PMRAC-07GH4 907 1 STRAINER (CAPILLARY)

3 PMRAC-07GH4 908 1 STRAINER (CONDENSOR)

4 PMRAC-05CV 901 1 FAN MOTOR SUPPORT

5 PMRAC-10C8 908 1 FAN MOTOR

6 PMRAC-10CV6 903 1 PROPELLER FAN

7 PMRAC-07CH2 901 1 CABINET

9 PMRAC-05CV 906 1 SIDE PLATE (R)

10 PMRAC-05CV 907 1 SIDE PLATE (L)

11 PMRAC-05CV 908 1 HANDLE

12 PMRAC-09CHA1 903 1 D-GRILL

13 PMRAC-07GH4 901 1 COMPRESSOR

14 PMRA-08GF 904 3 COMPRESSOR RUBBER

15 PMRA-08GF 905 3 COMPRESSOR NUT

16 PMRAC-07GH4 902 1 CONDENSER

17 PMRAC-07GH4 904 1 2S-VALVE

18 PMRAC-07GH4 905 1 3S-VALVE

30 PMRAC-10C8 905 1 FAN MOTOR CAPACITOR

31 PMRAC-18CVP2 901 1 TERMINAL BOARD (2P)

50 PMRAC-07GH4 906 1 COMPRESSOR CAPACITOR

51 PMRAC-07GH4 903 1 REVERSING VALVE

52 PMRAC-07GH4 909 1 OVERLOAD PROTECTOR

PART N0.

RAC-07G4

NO.

Q’TY / UNIT

PARTS NAME

– 72 –

MODEL RAC-09G4

1 PMRAC-09GH4 904 1 CHECK VALVE

2 PMRAC-07GH4 907 1 STRAINER (CAPILLARY)

3 PMRAC-09GH4 905 1 STRAINER (CONDENSOR)

4 PMRAC-05CV 901 1 FAN MOTOR SUPPORT

5 PMRAC-10C7 903 1 FAN MOTOR

6 PMRAC-10CV6 903 1 PROPELLER FAN

7 PMRAC-09GH4 907 1 CABINET

9 PMRAC-05CV 906 1 SIDE PLATE (R)

10 PMRAC-05CV 907 1 SIDE PLATE (L)

11 PMRAC-05CV 908 1 HANDLE

12 PMRAC-09CHA1 903 1 D-GRILL

13 PMRAC-09GH4 901 1 COMPRESSOR

14 PMRA-08GF 904 3 COMPRESSOR RUBBER

15 PMRA-08GF 905 3 COMPRESSOR NUT

16 PMRAC-09GH4 902 1 CONDENSER

17 PMRAC-07GH4 904 1 2S-VALVE

18 PMRAC-07GH4 905 1 3S-VALVE

30 PMRAC-10C7 904 1 FAN MOTOR CAPACITOR

31 PMRAC-18CVP2 901 1 TERMINAL BOARD

50 PMRAC-09GH4 903 1 COMPRESSOR CAPACITOR

51 PMRAC-07GH4 903 1 REVERSING VALVE

52 PMRAC-09GH4 906 1 OVERLOAD PROTECTOR

PART N0.

RAC-09G4

NO.

Q’TY / UNIT

PARTS NAME

– 73 –

5

4

8

9

15

7

6

18

17

14

16

10

11

12

22

3

1

23

24

21

2

25

PARTS LIST AND DIAGRAM

OUTDOOR UNIT
MODEL :

RAC-14G4

– 74 –

MODEL RAC-14G4

1 KPNT1 001 3 PUSH NUT

2 PMRAC-14GH4 901 1 COMPRESSOR

3 RAC-2226HV 805 3 COMPRESSOR RUBBER

4 PMRAC-25NH4 904 1 VALVE (2S)

5 PMRAC-25NH4 905 1 VALVE (3S)

6 PMRAC-25NH4 901 1 CONDENSOR

7 PMRAC-51CA1 905 1 FAN MOTOR SUPPORT

8 PMRAC-18C7 901 1 FAN MOTOR

9 PMRAC-25CNH2 902 1 PROPELLER FAN

10 PMRAC-18CVP2 901 1 TERMINAL BOARD

11 PMRAC-09GH4 903 1 COMPRESSOR CAPACITOR

12 PMRAC-10C7 904 1 FAN MOTOR CAPACITOR

13 PMRAC-14GH4 902 1 HANDLE

14 PMRAC-51CA1 901 1 CABINET

15 PMRAC-09CHA1 903 1 D-GRILL

16 PMRAC-14GH4 905 1 SIDE PLATE (R)

17 PMRAC-51CA1 908 1 NET

18 PMRAC-51CA1 909 1 TOP COVER

21 PMRAC-07GH4 903 1 REVERSING VALVE

22 PMRAC-14GH4 903 1 STRAINER (CAPILLARY)

23 PMRAC-14GH4 904 1 STRAINER (CONDENSOR)

24 PMRAC-09GH4 904 1 CHECK VALVE

25 PMRAC-14GH4 906 1 OVERLOAD PROTECTOR

PART N0.

RAC-14G4

NO.

Q’TY / UNIT

PARTS NAME

PM NO. 0198E

Printed in Malaysia

RAS-07G4 / RAC-07G4
RAS-09G4 / RAC-09G4
RAS-14G4 / RAC-14G4