Hitachi RAS-07CH4, RAS-09CH4 Service manual

PM

NO. 0205E

RAS-07CH4/RAC-07CH4
RAS-09CH4/RAC-09CH4

SERVICE MANUAL

TECHNICAL INFORMATION

FOR SERVICE PERSONNEL ONLY

RAS-07CH4
RAS-09CH4

REFER TO THE FOUNDATION MANUAL

CONTENTS

SPECIFICATIONS ............................................................... 5

HOW TO USE ..................................................................... 6

CONSTRUCTION AND DIMENSIONAL DIAGRAM ........ 32

MAIN PARTS COMPONENTS ......................................... 33

WIRING DIAGRAM ........................................................... 35

BASIC MODE .................................................................... 41

REFRIGERATING CYCLE ................................................ 46

AUTO SWING FUNCTION ............................................... 47

SERVICE CALL Q & A ..................................................... 48

PARTS LIST AND DIAGRAM ........................................... 53

RAC-07CH4
RAC-09CH4

SPECIFICATIONS

TYPE

MODEL RAS-07CH4 RAC-07CH4 RAS-09CH4 RAC-09CH4

POWER SOURCE 1Ø, 220 V, 50 Hz

TOTAL INPUT (W) 680 870

COOLING

HEATING

DIMENSIONS (mm) H 265 570 265 570

NET WEIGHT (kg) 7 26 7 26

TOTAL AMPERES (A) 3.15 4.1

CAPACITY

TOTAL INPUT (W) 630 860

TOTAL AMPERES (A) 3.0 4.1

CAPACITY

(kW) 2.05 2.50

(B.T.U./h) 7,000 8,500

(kW) 2.15 2.65

(B.T.U./h) 7,850 10,000

W 785 700 785 700

D 168 210 168 210

INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT

WALL TYPE

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

ROOM AIR CONDITIONER

INDOOR UNIT + OUTDOOR UNIT

MARCH 2004

H.A.P.M.

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.

First, I must disconnect
the power cord plug

from the power outlet.

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 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 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 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.

Spray

gasoline

gasbombe

DANGER

thinner

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).

A conductive polyvinyl bag

IC

HITACHI IC401TH1 ,188UV

IC

Conductive sponge

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.

Body earth
(Elimik conductive band)

Fig. 2 Body Earth

– 1 –

Clip for connection with
a grounding wire

(6) Use a three wire type soldering iron including a grounding wire.

Metal plate (of aluminium, stainless steel, etc.)

Staple

Bare copper wire (for body earth)

Fig. 3. Grounding of the working table

Working table

Resistor of 1 MΩ (1/2W)

Earth wire

Soldering iron

Screw stop at the screwed
part using a rag plate

Fig. 4. Grounding a soldering iron

Use a high insulation mode (100V, 10MΩ or higher) when ordinary iron is to be used.

Grounding wire

(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.

– 2 –

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.

– 3 –

The Length of Indoor Unit

Connecting Cord

about

0.9m

Do not alter the power cord.

Cut away shaded
portion, and finish
the edge of the
opening so that
there is no burr.

Connection

about 1.6m

20

Horizontally
perpendicular
to the unit

There are 3 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.

Figure showing the Installation
of Indoor and Outdoor unit.

Be sure to
completely
seal any gap
with putty.

above 300mm

about 0.45m

must not bend

above 100mm

above 50mm

above 100mm

2,300mm or more

Dimension of Mounting Stand

of the outdoor unit

(unit : mm)

mounting stand

500

35

12

8

225

35

100

above 50mm when
installed on the
ceiling of balcony

above 100mm

* above 200mm

above 200mm

Maximum pipe length 10m

Minimum pipe length 5m

* above 50mm

* give clearance

as wide as possible

above 200mm

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 ø 16mm

– 4 –

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

SPECIFICATIONS

MODEL RAS-07CH4 RAC-07CH4 RAS-09CH4 RAC-09CH4

FAN MOTOR 10 W 20 W 10 W 20 W

FAN MOTOR CAPACITOR 1 µF, 400 V 1.5 µF, 400 V 1 µF, 400 V 1.5 µF, 400 V

FAN MOTOR PROTECTOR

COMPRESSOR NO G333DB2Z NO G533QB9Z

COMPRESSOR MOTOR CAPACITOR NO 30 µF, 400 V NO 30 µF, 400 V

OVERLOAD PROTECTOR NO YES NO YES

OVERHEAT PROTECTOR NO NO NO NO

FUSE (for MICRO COMPUTER) 3.0 A NO

POWER RELAY G4A NO G4A NO

POWER SWITCH YES NO YES NO

TEMPORARY SWITCH YES NO YES NO

SERVICE SWITCH YES NO YES NO

TRANSFORMER YES NO YES NO

VARISTOR 450NR NO 450NR NO

YES (INTERNAL) YES (INTERNAL) YES (INTERNAL) YES (INTERNAL)

NOISE SUPPRESSOR NO NO NO NO

REMOTE CONTROL SWITCH (LIQUID CRYSTAL)

THERMOSTAT YES (IC) NO YES (IC) NO

FUSE CAPACITY 10 A TIME DELAY FUSE

UNIT -------- ❇ 630 g -------- ❇ 700 g

REFRIGERANT CHARGING
VOLUME WITHOUT REFRIGERANT BECAUSE COUPLING IS FLARE
(Refrigerant 22) PIPES TYPE.

❇ 630g for piping set of 5 ~ 8m.
❇ 700g for piping set of 5 ~ 8m.

YES NO YES NO

P - 105 VK1 (5m), P - 108 VK1 (8m)

– 5 –

SAFETY PRECAUTION

●

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

●

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

●

The sign indicate the following meanings.

Make sure to connect earth line.

Indicates the instructions that must be followed.

●

Please keep this manual after reading.

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

WARNING

CAUTION

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.

The sign in the figure indicates prohibition.

W

A
R
N

N

G

W

A
R
N

N

G

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.

I

●

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.

PRECAUTIONS DURING OPERATION

●

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.

I

●

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

●

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

– 6 –

PRECAUTIONS DURING OPERATION

●

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

C

A

to drain pan. The water will drop on tangential fan and cause water
splashing out from indoor unit.

U

T

I

O

●

Please switch off the unit and turn off the circuit breaker during cleaning, the
high-speed fan inside the unit may cause danger.

N

●

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.

– 7 –

NAMES AND FUNCTIONS OF EACH PART

INDOOR 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)

OUTDOOR UNIT

Drain pipe

Condensed water drain to outside.

Connecting cord

Air inlet (Back and left side)

Air outlet

Blow out warm air.

MODEL NAME AND DIMENSIONS

MODEL WIDTH (mm) HEIGHT (mm) DEPTH (mm)

RAS-07CH4, RAS-09CH4 785 265 168

RAC-07CH4, RAC-09CH4 700 570 210

– 8 –

OPERATION INDICATOR

TEMPORARY SWITCH

Temporary Switch

RAS-

POWER SWITCH

INDOOR UNIT INDICATORS

Press

about 7mm

Non-conductor Stick

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.

RAS-

OPERATION LAMP

This lamp lights during operation.

TIMER LAMP

This lamp lights when the timer is working.

SIGNAL RECEIVER

There will be a beep sound when this receiver receives
signal from remote control.

– 9 –

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.

● 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

(AUTO) to (HEAT) to (DEHUMIDIFY) to

(AUTO) to (HI) to (MED) to (LOW)

RESET

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

mode will change from

(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
(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.

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.

– 10 –

AUTOMATIC OPERATION

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.

RESET

1

START

STOP

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

● When AUTO has been selected, the device will automatically

determine the mode of operation, HEAT, COOL or
DEHUMIDIFY depending on the current room temperature.

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

have to press the

You can raise or lower the temperature setting as necessary by
maximum of 3°C.

C

● The preset temperature and the actual room temperature may

vary somewhat depending on conditions.

● The display does not indicate the preset temperature in the AUTO

mode. If you change the setting, the indoor unit will produce a
beep.

(START/STOP) button next time.

Press the temperature button and the
temperature setting will change by 1°C each time.

■ CONDITION OF AUTOMATIC OPERATION

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

change.

Initial room temperature
(approx.)

Over 27°C COOL 27°C

23~27°C DEHUMIDIFY LOW

Under 23°C HEAT 23°C

➡

➡

➡

Function Temperature setting FAN SPEED

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

– 11 –

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

C

˚

1

(HEAT).

RESET

Set the desired fan speed with 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.

2

C

˚

3

(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.

(FAN SPEED) button (the

START

STOP

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

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

have to press the

(START/STOP) button next time.

– 12 –

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.

C

˚

Press the FUNCTION selector so that the display indicates

(DEHUMIDIFY).

1

RESET

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).

2

˚

STOP

■ As the settings are stored in memory in the remote controller, you only
have to press the

C

START

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

The range of 20-26°C is recommended as the room
temperature for dehumidifying.

(START/STOP) button next time.

■ 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.

– 13 –

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

C

˚

1

(COOL).

RESET

Set the desired fan speed with 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.

2

C

˚

3

(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.

(FAN SPEED) button (the

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

START

STOP

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

function does not start if the temperature setting is higher than
the current room temperature (even though the
lamp lights). The cooling function will start as soon as you set
the temperature below the current room temperature.

have to press the

(START/STOP) button next time.

(OPERATION)

– 14 –

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 the

1

(FAN).

RESET

FAN SPEED (AUTO) …

For the heating operation

2

START

STOP

When the AUTO fan speed mode is set in the cooling/heating operation:

● The fan speed will automatically change according to the temperature of

● When the difference of room temperature and setting temperature is

● When the room temperature reaches setting temperature, fan speed

Press the (FAN SPEED) button.

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

discharged air.

large, fan starts to run at HI 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.

– 15 –

HOW TO SET THE TIMER

RESET

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

OFF TIMER

ON TIMER

RESERVE

CANCEL

ON-Timer

●

The device will turn on at
the designated times.

Time, Day, Month

After you change the
batteries;

M D

OFF-Timer

Start

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

STOP

Stop

Set the current month and

1

day with the TIMER control
button.

M D

1

Press the (OFF-TIMER)
button. The (OFF) mark blinks
on the display.

1

Press the (ON-TIMER)

Start

button the (ON) mark blinks
on the display.

AM

AM

1

ON/OFF-Timer

Start Stop

●

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.

PM

2

Set the turn-off time

with the TIMER control

button.

Press the (RESERVE)

button.

PM

3

Press the (ON­TIMER) button so that the
(OFF) mark lights and
the (ON) mark blinks.

PM

AM

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.

– 16 –

2

Press the
(TIME) button.

AM
PM PM

3

Set the current time with
the TIMER control button.

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

4

Press the (TIME) button again.
The time indication starts lighting instead
of flashing.

●

The time indication will disappear

PM

automatically in 10 second.

●

To check the current time setting,
press the (TIME) button twice.

The setting of the current time is
now complete.

2

Set the turn-off time with
the TIMER control button.

PM

2

Set the turn-on time with
the TIMER control button.

AM

4

Set the turn-on time with
the TIMER control button.

PM

AM

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.

PM

The setting of turn-off time is now complete.

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.

AM

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

PM

AM

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.

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.

– 17 –

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.

Mode Indication

H

SLEEP

Sleep timer

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.

H

Sleep

timer

1

Set the On-timer.

Start

1 hour 2 hours 3 hours 7 hours

Sleep timer off

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.

2

Press the

H

(SLEEP) button and set the sleep timer.

AM

AM

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.

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.

– 18 –

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.

Operation with the sleep timer

Function Operation

Heating

“ ”

Cooling

“ ”

and

dehumidifying

“ ”

Fan

“ ”

The room temperature will be
controlled 5°C below the
temperature and the FAN
SPEED will be set to LOW setting
30 minutes after the setting of
the sleep timer.

The room temperature will be

Sleep timer set

30 minutes later

2°C

2 hours
later

controlled 2°C above the
temperature and the FAN
SPEED will be set to LOW setting
30 minutes after the setting of
the sleep timer.

Sleep
timer set

30 minutes later

2 hours
later

6 hours
later

3 hours later

The settings of room temperature and circulation are varied.

5°C

7 hours
later

3 hours later1 hour later

7 hours later

NOTE

●

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 earlier.

●

You can not set other timer during sleep timer operation.

●

After sleep timer time is up and when press sleep button again, the sleep timer will be set as last setting.

●

Sleep timer effective only once.

– 19 –

ADJUSTING THE AIR DEFLECTORS

1

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

According to “Dehumidifying” and “Cooling” operation,
the horizontal air deflector is automatically set to the
proper angle suitable for each operation.

The deflector can be swung up and down and also
set to the desired angle using the “
SWING)” button. (If the angle of the deflector is
changed, it will not return to the auto-set position
after operations start unless the operation mode is
switched.)

●

If the “
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 12 seconds) may be required before the
deflector starts to move.

●

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
some dew may drop.

(AUTO SWING)” button is pressed

(AUTO

When cooling
dehumidifying

about 25°

about 20°

about 35°

When heating

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.

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.

– 20 –

HOW TO EXCHANGE THE BATTERIES IN THE REMOTE CONTROLLER

1

2

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

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

CAUTION

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.

Push and pull to the
direction of arrow

– 21 –

THE IDEAL WAYS OF OPERATION

Suitable Room Temperature

Warning

Freezing temperature is
bad for health and a
waste of electric power.

Ventilation Effective Usage Of Timer

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.

Install curtain or blinds

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.

Do Not Forget To Clean The Air Filter

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 Adjust Suitable Temperature For

Baby and Children

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.

– 22 –

FOR USER’S INFORMATION

The Air Conditioner And The Heat Source In The Room

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.

Not Operating For A Long Time

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.

OFF

When Lightning Occurs

Warning

To protect the whole unit during lightning, please
stop operating the unit and remove the plug from the
socket.

Interference From Electrical Products

Caution

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

To prevent
interference,
place at least
1m away.

Inverter-type
fluorescent
lamp.

TV

– 23 –

MAINTENANCE

!

CAUTION

Before the cleaning, stop operation and disconnect 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.

PROCEDURE

1.

Remove dust from the filter using a vacuum cleaner. If
there is too much dust, use neutral detergent. After
using neutral detergent, wash with clean water and
dry in the shade.

2.

Install the filters.
(Set them with “FRONT”
mark facing front.)
Slot in the filter to the original state.

!

CAUTION

Do not wash with hot water at more than 40°C. The

●

filter may shrink.

●

When washing it, shake off moisture completely and
dry it in the shade; do not expose it directly to the
sun. The filter may shrink.

●

Do not operate the air conditioner with the filter
removed. Dust may enter the air conditioner and
cause trouble.

NOTE:

●

This model has an air cleaning filter. The cooling
capacity is slightly weakened and the cooling speed
becomes slower when the air cleaning filter is
used.So, set the fan speed to “HIGH” when using it
in this condition.
Recommended to replace the air cleaning filter after

●

every 3 months for normal usage. Type number for
this air cleaning filter is <SPX-CFH3>. Please use
this number for ordering when you want to renew it.

REMOVING METHOD

1.

Press the “ (AUTO SWING)”
button, let the deflector facing
downward.

2.

Remove the filter from the lower side
as the arrow shown.

INSTALLATION METHOD

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

2. CLEANING OF FRONT COVER, ETC.

●

Wipe it with a soft dry cloth.

●

When it is excessively dirty, wipe
with a soft cloth soaked in
luke warm water or neutral
detergent. Then wipe thoroughly
with a soft dry cloth.
Wipe the remote controller

●

thoroughly with a soft dry cloth.

– 24 –

!

CAUTION

●

Never use hot water (above 40°C),
benzine, gasoline, acid, thinner or
a brush, because they will damage
the plastic surface and the coating.

A

B

E

N

Z

C

E

I

N

I
D

3. MAINTENANCE AT BEGINNING OF LONG OFF PERIOD

Running the unit 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.

Disconnect the power plug.

REGULAR INSPECTION

PLEASE CHECK THE FOLLOWING POINTS EVERY EITHER HALF YEARLY
OR YEARLY. CONTACT YOUR SALES AGENT SHOULD YOU NEED ANY
HELP.

1

Confirm

Air

Blow

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

2

3

Is the earth line disconnected or broken?

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

– 25 –

AFTER SALES SERVICE AND WARRANTY

WHEN ASKING FOR SERVICE, CHECK THE FOLLOWING POINTS.

CONDITION CHECK THE FOLLOWING POINTS

●

Is the fuse all right?

When it does not operate

When it does not cool well

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

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 please clean the air filter and the evaporator regularly to
reduce the odor.

●

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
ofheat in the room?

●

Is the set temperature suitable?

gradually warmed as operation stops.

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.

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.

– 26 –

HOW TO REPLACE NEW UV-LED AND FILTER

1

Open the front cover.

2

Cut the binder.

Lift up the left side of the
evaporator.

– 27 –

3

Rear view

4

5

Remove tape at the
cabinet.

Disconnect the connector between
UV-LED and electrical box.

Remove the K-spring.

Remove aluminium tape
at the cabinet.

Remove tape at the
electrical box.

6

Pull up the ACL-holder.

– 28 –

7

Remove the UV-LED.

If necessary, change the
ACL filter (SPX-CFH9).

8

9

After replace new UV-LED and filter,
make sure to reattach the aluminium
tape.

Put back the K-spring.

10

Connect the connector between UV­LED and electrical box.

– 29 –

11

Rear view

12

Reattach tape at the
cabinet.

Reattach the evaporator to
its place.

Reattach the binder.

Reattach tape at the
electrical box.

– 30 –

13

Put back the front cover.

– 31 –

CONSTRUCTION AND DIMENSIONAL DIAGRAM

MODEL RAS-07CH4, RAS-09CH4

785

Mounting
plate

Air suction grill

785

Top Air suction grill

147

56 17.5

Wireless remote controllerWireless remote controller

Front cover

168 10

77

CabinetCabinet

60

Discharge grill

47

6.5

400

About

About 430

About 340

VIEWED FROM BACKVIEWED FROM BACK

Vertical air deflector

167.5 450

92

43

(PIPE LEAD-OUT)(PIPE LEAD-OUT)

88.5

MODEL RAC-07CH4, RAC-09CH4

700

428

58 58

Drain outlet

Drain hose

Hole on the wall
for ø65mm pipe

Connecting cable

Line cord

243

Horizontal air deflector

P

(167.5)

Drain pan

Narrow pipe (ø6.35)

Wide pipe (ø9.52)

53

25

43

236
210 10

265

47

Drain cap connection part

When piping is drawnWhen piping is drawn
horizontally, exchange
the drain hose for the
drain cap.

55.5

60

6.5

482

P

Handle

570

517

77

(18)

135

500

75

Air inlet

55

16

12

35

490

Viewed from P

157

Air outlet

Handle

245

8

225

10

– 32 –

MAIN PARTS COMPONENTS

THERMOSTAT

Thermostat Specifications

MODEL

RAS-07CH4, RAS-09CH4

THERMOSTAT MODEL IC

TEMPERATURE

°C (°F)

INDICATION

16

INDICATION

24

INDICATION

32

ON

OFF

ON

OFF

ON

OFF

17.6 (63.7)

16.6 (61.8)

25.6 (78.1)

24.6 (76.3)

33.6 (92.5)

32.6 (90.7)

FAN MOTOR

Fan Motor Specifications

MODEL

RAS-07CH4, RAS-09CH4 RAC-07CH4, RAC-09CH4

PHASE

RATED VOLTAGE

RATED FREQUENCY

OUTPUT

POLE NUMBER

CONNECTION

RESISTANCE VALUE

(Ω)

20°C

(68°F)

25°C

(77°F)

220 – 240V

10 W 20 W

46

1

A1

3

A2

2

A3

65

M

T.F

Cr

M= 541.0 A2 = 87.6
A1 = 148.3 A3 = 147.4

M= 551.6 A2 = 89.3
A1 = 151.2 A3 = 150.3

SINGLE

50 Hz

4

INTERNAL
THERMAL FUSE

BLACK

CAPACITOR

WA
WM

WA
WM

RED

WM

WA

GRAY

= 348.2
= 284.6

= 355
= 290.2

– 33 –

COMPRESSOR MOTOR

Compressor Motor Specifications

MODEL RAC-07CH4

COMPRESSOR MODEL G333DB2Z

PHASE SINGLE

RATED VOLTAGE 220 – 240 V

RATED FREQUENCY 50 Hz

LOCKED ROTOR CURRENT 22 A

POLE NUMBER 2

ORANGE

CONNECTION

CAPACITOR

RESISTANCE VALUE

20°C

(68°F)

RA = 4.072
RM = 3.938

RAC-09CH4

G533QB9Z

SINGLE

220 – 240 V

50 Hz

22 A

2

WHITE

RM

RA

RED

RA = 4.372
RM = 3.154

(Ω)

75°C

(167°F)

RA = 4,896
RM = 3.787

RA = 5.315
RM = 3.834

ORANGE

RED

WHITE

CAUTION

When the Air conditioner has been operated for a long time with the capillary tubes clogged or crushed

When the refrigerating cycle has been operated for a long time with the capillary tubes clogged or

or with too little refrigerant, check the color of the refrigerating oil inside the compressor. If the color has

crushed or with too little refrigerant, check the color of the refrigerating machine oil inside the
compressor. If the color has been changed conspicuously, replace the compressor.

been changed conspicuously, replace the compressor.

– 34 –

WIRING DIAGRAM

MODEL RAS-07CH4, RAC-07CH4

:

COMPRESSOR

A

N

: REVERSING VALVE

: FAN MOTOR

B

: POWER SWITCH

C

: 1,000 PF CAPACITOR

D

: FAN MOTOR PROTECTOR (INTERNAL)

E

:1 µF CAPACITOR

F

:35µF CAPACITOR

G

: 2.5 µF CAPACITOR

H

: FAN MOTOR PROTECTOR

I

: LINE CORD

J

: TERMINAL BOARD

K

: OUTDOOR FAN RELAY

L

: THERMAL FUSE FOR PCB

M

BLU : BLUE

GRY : GRAY

YEL : YELLOW

ORN : ORANGE

P

: POWER RELAY

Q

: THERMAL FUSE FOR TERMINAL BOARD

R

: SURGE ASSORBER

S

: THERMISTOR

T

: TRANSFORMER

U

P

: OVERLOAD PROTECTOR

V

: VARISTOR

W

: SOLID STATE RELAY FOR FAN (FAN SSR)

X

: FUSE

Y

: REVERSING VALVE RELAY

Z

: AUTO SWEEP MOTOR

BRN : BROWN

GRN : GREEN

WHT : WHITE

RED : RED

BLK : BLACK

PNK : PINK

C

X

(3.0A)

(96°C)

V

2

PRINTED WIRING
BOARD ASSEMBLY

V

M

1

(102°C)

X

R

Q

T

VIO : VIOLET

INDOOR UNIT OUTDOOR UNIT

P

HSL

D

B

(167°C)

W

Y

F

E

J

BB

14

L

AA

CC

I

(165°C)

B

2 3

A

G

H

N

– 35 –

DD

E

BLU

4

2 3

P

U

1

OUTDOOR UNIT

BLK

BLU

A

J

WHT

BRN

B

N

BLK

C

B

BLK

GRY

RED

GRY

BLK

H

RED

WHT(WHT)

(RED)

X

A

V

X

(ORN)

G

ORN

BLK

BLU

D

GRY + YEL

B

Z

M

J

INDOOR UNIT

BRN

C

M

GRY

YEL

WHT

BLU

A

B

BLK

BLU

12

34

BRN

F

W

P

L

43

BLK

GRN +

BLU

YEL

Y

RED

J

BLK

C

UV LED

BOARD

CN11

R901

CN3

CN3

8

CN4

WHT

BLU

BLK

D

R

GRN

WHT

I

V

WHT

BRN

M

WHT

CN10

X

CN12 (3.0A)

BRN

(96°C)

WHT

WHT

2

V

RED

Q

CN1

(102°C)

6

RED

CN2

ORG

CN2

ORG

CN7

GRY

GRY

GRY

S

BLK

BLK

CN8

GRY

L

N

T

K

– 36 –

MODEL RAS-07CH4, RAS-09CH4

RESISTOR

POWER

1/10W

1/16W

1/16W

1/16W

1/16W

1/16W

1/16W

1/16W

1/16W

1/16W

1/16W

1/16W

1/10W

1/16W

1/10W

1/16W

1/16W

1/16W

1/16W

FORMSYMBOL

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

R201

R202

R203

R204

R205

R206

R207

R210

R302

R303

R304

R307

R308

R309

R310

R311

R312

R313

R314

RESISTANCE

3K

10K

2.7K

5.1K

5.1K

10K

10K

1M

1K

10K

2.4K

1K

18K

1K

12.7K

1K

10K

10K

10K

TOLERANCE

±5%

±5%

±5%

±5%

±5%

±5%

±5%

±5%

±5%

±5%

±2%

±5%

±1%

±5%

±1%

±5%

±5%

±5%

±5%

R401

R402

R403

R404

R405

R406

R410

R411

R412

R413

R414

R501

R502

R503

R504

R505

R506

390

390

390

390

5.1K

5.1K

10K

10K

10K

10K

10K

560

560

560

560

560

560

TOLERANCERESISTANCE

±5%

±5%

±5%

±5%

±5%

±5%

POWER

1/16W

1/16W

1/16W

1/16W

1/16W

1/16W

±5% 1/16W C

±5%

1/16W

1/16W

±5%

1/16W

±5%

1/16W

±2%

1/10W

±5%

1/10W

±5%

1/10W

±5%

1/10W

±5%

1/10W

±5%

±5%

1/10W

FORMSYMBOL

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

R601

R603

R606

R607

R608

R609

R610

R611

R612

R613

R614

R702

R703

R705

R707

R708

R801

R901

RESISTANCE

10K

10K

10K

10K

1K

1K

1K

10K

1K

10K

5.1K

240

240

1K

20

20

3.3K

750

TOLERANCE

±5%

±5%

±5%

±5%

±5%

±5%

±5%

±5%

±5%

±5%

±5%

±5%

±5%

±1%

±5%

±1%

±5%

±5%

POWER

1/16W

1/16W

1/16W

1/16W

1/16W

1/16W

1/16W

1/16W

1/16W

1/16W

1/16W

1/10W

1/10W

1/16W

1/10W

1/10W

1/10W

1/4W

FORMSYMBOL

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

H

CAPACITOR

1000µ, 35V

C101

C102

100µ, 16V

C103

C104

C105

100µ, 10V

C106

33µ, 6.3V

C201

0.1µ, 25V

C202

0.1µ, 25V

C205

0.1µ, 25V

C206

0.1µ, 25V

C301

0.1µ, 25V

C302

0.1µ, 25V

C303

0.1µ, 25V

C401

1000P,AC250V

C501

1000P,AC250V

C502

1000P,AC250V

C503

1µ, 400VAC

C504

0.1µ, 25V

C601

33µ, 10V

C701

1000P, 50V

C801

OSCILLATOR

EFOEC8004A4OSC1

MODEL NO.

TYPERATING

D (VX)

D (VX)

D (VX)

D (VX)

C

C

C

C

C

C

C

C

C

C

F

C

D (WX)

C

FORMSYMBOL

H

FORMSYMBOL

H

H

H

H

C

C

C

C

C

C

C

H

H

H

H

C

C

C

TRANSISTOR

MODEL NO.

Q201

Q202

Q301

Q302

Q501

Q502

Q503

2SC2462LC

2SA1121SCT

GA1A4M

DTC114EUA

GA1A4M

GA1A4M

GA1A4M

DIODE

MODEL NO.

DB101

D401

D403

S1WB20

DAN202K

DAP202K

SURGE PROTECTORS

MODEL NO.

VARISTOR 1

VARISTOR 2

SURGE
ABSORBER

450NR12D

450NR12D

DSA-362MA-05

RELAYS

MODEL NO.

POWER RELAY

OUTDOOR

FAN RELAY

REVERSING

VALVE RELAY

DFT-RELAY

G5N-RELAY

G5N-RELAY

FORMSYMBOL

C

C

C

C

C

C

C

FORMSYMBOL

H

C

C

FORMSYMBOL

H

H

H

FORMSYMBOL

H

H

H

IC

MODEL NO.

IC1

MC7&12CT

MC7&05CT

HD6433712

BR24C02F

ULN2003ANS

TLP3507
TLP3507

TLP3507

RPM6938-V4

REG1

REG2

IC401

IC501

SSR-H

SSR-L

SSR-S

IR701

SWITCHES

MODEL NO.

EVQP05R-SWSW701

SERVICE

SW

SSSS9AE

BUZZER

MODEL NO.

PKM13EPYBZ1

ZENER DIODE

MODEL NO.

RLZB.8AZD201

LED

SYMBOL

LD702

LD703

MODEL NO.

SLR-332DC3F

SLR-332YC3F

NOTES:

FORMSYMBOL

1.

H

H

F:

C

C:
D:

C

C

2.

H

H

H:

H

C:
R:
A:

H

FORMSYMBOL

H

H

FORMSYMBOL

H

FORMSYMBOL

C

COLOUR

ORANGE

YELLOW

TYPE OF CAPACITOR

FILM
CERAMIC
ELECTROLYTIC

FORM

HAND INSERT
SMT
RADIAL
AXIAL

FORM

H

H

– 37 –

MODEL RAS-07CH4, RAS-09CH4

AC240V
50Hz

TRANSFORMER

LINE CORD

(BROWN)

L

(BLUE)

N

(YELLOW/
GREEN)

G

EARTH WIRE
(GREEN)

CN8

(EP-4P)

WHITE

POWER
SWITCH

21

34

MAIN BOARD

6

4

2

1

HP BOARD

BROWN

BLUE

BLACK

SURGE
ABSORBER

POWER RELAY

43

BLACK BLUE WHITE

VARISTOR1

3A
FUSE

VARISTOR2

R901

UV LED
BOARD

23

FAN
SSR-H

32

FAN
SSR-L

23

FAN
SSR-S

32

12345678

(ZR-8P)

5V

CN3

IVORY

CN3

(SZN-8P)

WHITE

R503

R504

Q502

R505

R506

Q503

CN4

(EP-3P)

315

WHITE

POWER RELAY

OUTDOOR FAN RELAY

REVERSING VALVE

87654321

12V

C

(14,H)

B
(14,H)
A

(14,H)

R501

R502

Q501

OUTDOOR FAN RELAY

REVERSING VALVE RELAY

(HIGH)

FAN
SSR-H

(LOW)

FAN
SSR-S

(MED)

FAN
SSR-L

8

8

C501

6

C502

6

C503

68

C504

32

1

3

5

7

9

11

WHITE

RED

CN11

(XH-6P)

WHITE

TERMINAL
BOARD

B

A

C

D

INDOOR FAN
MOTOR

FM

INDICATING P.C.B

R707

IR701

1

+

-

C701

LD703
(OPERATION)

R708

TEMPORARY
SW

3
LIGHT
RECEIVING

UNIT

2

LD702
(TIMER)

SW701

(EH-2P)
WHITE

THERM FUSE
(96°C) FOR
P.C.B.

(EH-2P)
WHITE

THERM FUSE
(102°C) FOR
TERMINAL A,B

CN2

(ZR-6P)

(SZN-6P)

IVORY

WHITE

1
2
3
4
5
6

(XH-4P)
BLACK

HA

CN12

CN1

CN2

CN9

C1

C2

M1

M2

F
(12,K)

10

11

12

SS

TEST

ABNORMAL FAN CURRENT

X1

X2

P5 6

P5 7

P1 7

R601

REMOCON ID
(A/B SELECTION)

ID2

0V

5V

R313

R314

9 8 7

7AN6AN5AN4AN3AN2AN1AN0

AN

NO USE

PWM VOLTAGE FEEDBACK

INDOOR FAN OVER-CURRENT

IC1

STICK RELAY

POWER RELAY

OUTDOOR FAN RELAY

P6 0

P6 1

P6 2

ID1

2

1

+

~

~

-

DB101

REG1

I

O

G

+

C101

C102

-

REG2

O

I

+

G

C104

C103

C105

12V

5V

+

C106

-­0V

5V

12V

R201

ZD201

R202

0V

+

-

RESET

5V

Q201

C201

R203

R205

Q202

R705

R703

R702

R204

OSC1

R210

C702

R208

R207

5V

0V

R206

16

C202

OSC2VSSX1X2AV

RES

17

REMOCON I/P

18

IRQ

0

AUTO-SWING

19

1P1

SINGLE/MULTI

20

IRQ

4

BUZZER

21

TM0E

CURRENT TRANS

22

P1 6

HA O/P

23

P4

7

DEHUMIDIFY

24

P4 6

OPERATION

25

P4 5

TIMER

26

P4 4

FILTER/

27

POWERFUL

P4 3

DASH

28

P4 2

COMP. OPER.

29

P4 1

COOL/DEHUM.

30

P4 0

HA I/P

31

P5 0

REMOCON SELECTION

32

P5 1

FORCED COOL

P5 2

14

15

1

OSC

LED OUTPUT

TEST INDICAT.

SELECTION

NICE TEMP.

CANCEL

P5 4

P5 3

P5 5

13

REMOCON ID

333435363738394041424344454647

C601

5V

R614

NORMAL

COOL

SERVICE SW

R607

R608

R603

R606

5V

R613

R612

R611

2

1

5V

1
2
3
4
5
6

0V

5V

1
2

R610

3

R609

4

0V

C303

6 5 4 3 2

HEX. TH.

FAST FEED

TEST INDICATION MODE

HEX. TEMP

RANGE SELECTION

REVERSING VALVE R.

FAN S

FAN LO

P6 3

P6 4

P6 5

P6 6

E

(12,E)

D

5V

C302C301

ROOM TH.

EEPROM

SELECTION

NO USE

NO USE

SCL

EEPROM

SDA

PWM O/P

NO USE

NO USE

NO USE

NO USE

LOUVER

CCW

FAN HI

HEATER

P6 7

F

(12,E)

(12,K)

R311

R312

1

CC

AV

ONE TOUCH
SUPER

P9

COOL

P9

P9

P9

P9

P9

P9

P9

V

P7

P7

P7

P7

B

P7

A

P7

B

P7

A

P7 0

48

(12,E)

E

0V

R302

R307

R309

5V

C205

C206

0V

64

7

R410

63

6

62

5

R411

61

4

R412

60

3

R413

59

2

58

1

57

0

CC

56

55

7

54

6

53

5

52

4

51

3

50

2

49

1

0V

0V

0V0V

R401

R402

R414

Q301

D

(12,K)

0V

IC501

0V

7
6
5
4
3
2
1

R304

12V

0V

9

8

5V

C401

0V

0V

IC401

2

(E

PROM)

1
2
3

4

(10,D)

C

10
11
12
13
14
15
16

Q302

8
7
6
5

(10,D)

B

R303

0V0V

(10,D)

R405

A

R308

0V

R406

EXTENTED
MEMORY

5V

0V

R310

D401

D403

R801

R403

R404

12V

0V

B.Z

5V

BZ1

5V

12V

3
2
1

4
3
2
1

4
3

2
1

5
4
3
2
1

CN6

(ZR-3P)
IVORY

TEST

GRAY

GRAY

BLACK

BLACK

CN7

(PH-4P)
WHITE

CN5

(ZR-4P)
IVORY

CN10

(ZR-5P)
IVORY

HEAT EXCHANGER
THERMISTOR

RESISTANCE: 10K ohms 3% (25 C)
B-CONSTANT: 3950K 2% (B25/50)

ROOM TEMPERATURE
THERMISTOR

RESISTANCE: 10K ohms 2% (25 C)
B-CONSTANT: 3950K 2% (B25/50)

M

STEPPING
MOTOR

– 39 –

"

BASIC MODE

Control function

Start/stop button,

1

basic mode

Timer

2

operation

Circulation

3

mode

Thermostat operation
H → HI
L → MED
S → LO

4

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

Operation mode

OFF timer

ON timer

Automatic

HI

MED

LO

Fan Cooling Sensor dehumidification Heating Automatic

• Operation in the previous
circulation mode

• Operation in “HI” mode

• Operation in “MED” mode

• Operation in “LO” mode

• Only circulation with cut

velocity is executed,
independent of the
thermostat signal.

(1) Strong

Start/stop button
Fan relay H

Stick relay

•“HI”, “MED”, or “LO” operation is

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

• Same as on the left.

• Same as on the left.

• Same as on the left.

(1) In case of “Automatic” mode

+3
+2

Set temperature

Start/stop button
Fan relay H
Fan relay L
Fan relay S
Power relay
Stick relay
External fan relay

Operation lamp

+1

-1

-2

-3

2"

2" 2"

H S L S L H S

2"

S L L

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).

Start/stop button
operation lamp

Start/stop button
Reservation
Cancel
Operation lamp
Timer lamp
Timer memory

Start/stop button
Reservation
Cancel
Operation lamp
Timer lamp
Timer memory

•

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

(OFF timer during stop) (Cancel)

(ON timer during operation)

Operation and stop are repeated
independent of timer reservations

(Cancel)

signal, independent of the setting.

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

+3
+2

Set temperature

Start/stop button
Fan relay S

Power relay
Stick relay

External fan relay

Operation lamp

+1

-1

-2

-3

2"

30" 30"

2"

2"

S S S

• 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 start/
stop button ON.

• The indoor fan is delayed by 5 sec with operation start by
thermostat operation.

(2) Set temperature higher than room temperature

Set temperature

0.66 deg

0.33 deg

Start/stop button
Fan relay S

Power relay
Stick relay

External fan relay

Operation lamp

-1

-2

-3

-4
30"

30"

2"

2"

Notes:

• Forced operation by start/
stop 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).

(Change of the reservation time)

(Change of the reservation time)

•“HI”, “MED”, “LO”, and “Stop” are repeated according to the thermostat

signal and time.

•“HI”, “MED”, “LO”, and “Stop” are repeated according to the thermostat
signal and time.

•“MED”, “LO”, and “Stop” are repeated according to the thermostat signal
and time.

•

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

time.

Example for “HI” circulation mode

+3

(Set temperature)+
(Temperature shift amount)

Start/stop switch

Fan relay H

Fan relay L

Fan relay S

Power relay

Stick relay

External fan relay

4 way valve relay

Heater relay 10"

Pilot lamp

Hot keep lamp

+2
+1

-1

-2

-3

-4

30"

30"

2"

T"T"

30"

2"

HSL

S

B

S

30"

LHS

T"

30"

SL

30"

2"

10"

H

Air-blow mode (A) (B)

HL H
LL L
SS S

Automatic L ❈L

Notes:

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

• In automatic circulation mode, “HI” in section (B) occurs only the first time.

30"

TEMPERATURE OF INDOOR HEAT
EXCHANGER THERMISTOR

T

9

T

8

T

6

T

7

T

5

T

3

T

4

5

Heating load reduction and Pd cut

• The “Automatic” speed mode for
each operation mode is used
independent of the setting. “Week”
at the time of “Sensor

PD CUT 1
PD CUT 2
PD CUT 3
FAN RELAY H
FAN RELAY L
POWER RELAY
STICK RELAY
EXTERNAL FAN RELAY
4-WAY VALVE RELAY

AIR BLOW CHANGE TO "H" FORCILY BY INPUTING "PD CUT 2"
AIR BLOW MAKE A POSSIBLE TO CHANGE AIR BLOW AT TEMP. T
AIR BLOW RETURN TO THE ORIGINAL SETTED TEMP. AT TEMP T

7.

5.

dehumidification”.)

Indoor heat exchanger

• The operation mode at the start

of operation differs as shown
below according to the room
temperature.

Cooling The set temper-

T"

30"

27˚C

operation

2"

23˚C

Room temperature

← at the start of →

ature shall be 27˚C.

Sensor

The set temper-

dehumidi-

ature shall be 2

fication

degrees below the
room temeerature
at the start of
operation.

Heating The temperature

shall be 23˚C +
temperature shift
amount.

6

Reversing valve lock protection

Low-temperature input

Fan relay H

Power relay

Stick relay

External fan relay

Reversing valve relay

Timer lamp

1

T

• A shift is not accepted at the time

of operation start.

thermistor temperature

(0.5)

(0.5)

(0.5)

(0.5) (0.5)

(0.5)

(0.5)

(0.5)

1 sec

(1 sec)

• All relays are stopped by low-

temperature input.

• Not accepted during hot keep,
during compressor stop, during
defrosting and during forced 3
minutes.

• Accepted only during heating
operation.

• Receovery at the time of stop by
low-temperature input is reset
recovery.

• The timer lamp flashes at the time
of stop.

1 sec

• There is no switching between

modes after start of operation.

• When the operation is started
again within 20 min. after stop with

H

L

S

the start/stop 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.

– 41 –

–1

–2

–3

7 Preheating

8

Low Power Dehumidification

Operation mode

Control function

operation

Defrosting
(including automatic
fresh defrosting).

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

• The indoor fan is not delayed in operation when the Dry button is pressed ON.

Fan Cooling Sensor dehumidification Heating Automatic

Set temperature

Dry Button

Fan relay L

Power relay

Stick relay

Operation lamp

Fan relay H

Power relay

Stick relay

Outside fan relay

Operation lamp

Cooling strong

Fan relay S

Power relay

Stick relay

Outside fan relay

Operation lamp

Sensor dehumidification

+3

+2

+1

–1

–2

–3

60 minutes

0.2 sec

LLL

Indoor heat exchanger
thermistor temperature

1

T

Min. 3 minutes

1deg up

32 sec

32
sec

0.2 sec 0.2 sec

0.2

0.2

sec

sec

1 min

6 min

0.2
sec

6 min

1 min

"Strong" circulation

Start/stop switch
Thermostat signal
Preheating signal
Fan relay H
Fan relay L
Fan relay S
Power relay
Hot keep lamp

Notes:

30 sec 30 sec

2 sec

T

• Even when the preheating signal is not given as input, heating operation is started when 3 minutes have
passed for T.

• Preheating operation is executed at the time of operation start and after completion of defrosting, and at all
other times, there is no operation, independent of the preheating signal.

Defrosting
start

15 sec

30 sec

60 sec

• For the time TE after start of heating operation, defrosting will not be executed even
when the defrosting signal is given as input.

• When the reserve cycle defrosting T
the left, the operation advances to T

• When the power relay becomes ON after expiration of the time T
started immediately with input of the defrosting signal.

• Once defrosting has been completed, the defrosting signal is not accepted for the
time T

E

• When a defrosting signal has been given as input at the time of stop by means of the

• The defrosting signal is not accepted at the time of overload input.

.

start/stop switch or at the time of OFF timer count-up, defrosting is executed before
operation stop.

Start/stop switch

Defrosting signal

Preheating signal

Fan relay H

Fan relay L

Fan relay S

Power relay

Stick relay

Outside fan relay

Reversing valve relay

Heater relay

Operation lamp

Hot keep lamp

(Reverse cycle defrosting)

(Silencing period)

(Cycle balancing time)

(Defrosting prohibition

time)

30 sec

2 sec

10 sec

TA

TB

TC

TE

30 sec

10 min.

+0

min.

-1

30 sec

30 sec

60 min.

+0

min.

-5

TE

(2) Set temperature higher than room temperature.(2) When the set temperature is lower than the room temperature.

Notes:

• Focused operation by Dry button ON is executed even with thermostat OFF.

• The room temperature 30 sec after operation start minus 0.33 deg., becomes the set temperature.

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

• The other operation are the same as for (I).

• The indoor fan is not delayed in operation when the Dry button is pressed ON.

30 sec 30 sec

15sec

2 sec

3 minutes

A TATB TC

T

Set temperature

0.66deg

0.33deg

Dry Button

Fan relay L

Power relay

Stick relay

Operation lamp

Completion

2 sec

15 minutes-T

30 sec

10 sec

A

has continued for the time shown in the table on

B

and TC independent of the defrosting signal.

-1

-2

-3

-4

60 minutes

0.2 sec 0.2 sec 0.2

LLL

30 sec

E

32 sec

15 sec

30 sec 60 sec

1 deg up

3 minutes

E

, defrosting will be

32 sec

0.2

sec

sec

• At the time of heating
operation mode, the same
operation as for heating is
executed.

• Defrosting of each operation
mode is executed.

0.2 sec

Table 1 Specifications

Item
Operation switching

Automatic
Heating
Fan
Sensor

dehumidification

Cooling

Temporary switch
Service switch

Heating

Cooling
Nice temperature reservation
Automatic fresh defrosting
Defrosting
Pd cut 1
Pd cut 2
Pd cut 3
Heating load reduction
External fan relay
Reversing valve relay
Reversing valve lock protection
Sleep circuit

Heater operation at the time of sensor

Yes
Yes

Yes

Yes

Yes

Yes (automatic)

Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes

No

dehumidification

Automatic blowing direction
Filter sign

Wireless mode

Yes

No

Heating wireless

Table 2 Sensor operation values

Item

16 17.6
24 25.6
32 33.6

24 27.6

Thermostat
operation

ON temperature
(Thermostat relay)
power relay
(°C)

Cooling, Sensor
dehumidification

Heating 16 19.6

32 35.6

Differential (°C) 0.33

–
–

Low-temperature (T1) ON (°C) 5.0
defrosting Reset (°C) 9.0
Preheating (T2) Reset (°C) 17.0

ON (°C) 15.0

–
–

Pd cut 1 (T3) ON (°C) 48.66

(T4) Reset (°C) 45.66

Pd cut 2 (T6) ON (°C) 55.0

(T7) Reset (°C) 49.0
(T5) Fan Relay H → Original (°C) 35.0

Pd cut 3 (T8) ON (°C) 63.0

(T9) Reset (°C) 55.0

Other detailed specifications

1. When the room temperature rises
within 3 minutes after thermostat
OFF during cooling operation with
automatic velocity, the blowing
velocity changes in the order of S
← L → H in the same way as at the
time of thermostat ON.

2. In case of Tele. control input during
stopped ON timer, operation will be
started at that time and the timer will
be cleared.

3. In case of Tele. control input during
operation of the OFF timer, the
operation will be stopped at that time
and the timer will be cleared.

4. Even when operation stop is
executed at the time of outside fan
OFF by overload, automatic fresh
defrosting will not be executed.

5. In case of switching to “Heating”
during “Automatic” heating
operation, the operation will be
continued as it is when the
thermostat is ON. 3 min delay will
not be entered. However, the set
room temperature and the blowing
velocity will be according to the
remote control signal. The same
applies for switching from “Heating”
to “Automatic” heating.

6. In case of switching from “Sensor
dehumidification” operation to
“Cooling” , as it is when the
thermostat is ON. 3 min delay will
not be entered. However, the set
room temperature and the blowing
velocity will be according to the
remote control signal.
The same applies for switching from
“Cooling” to “Sensor dehumidifica­tion”. The same also applies for
“Automatic” sensor dehumidification,
cooling “Sensor dehumidification”,
“Cooling”.

7. The filter sign lights after operation
of the indoor fan for 100 hours. The
time is cleared by the filter switch.

8. After entry into trouble mode (when
the indication lamp is flashing), the
rapid feed mode can not be
changed.

9. When operation by nice temperature
reservation is executed during sleep
operation, normal operation will be
continued, and the advance time
becomes the temperature difference
between the set temperature without
sleep shift and the room
temperature.

10.

The 60 minutes of defrosting
prohibition are counted from
thermostat ON after start/stop
switch ON. When the thermostat is
OFF at the time of start/stop switch
ON, the 60 minutes will be counted
from the time of thermostat ON. The
initial OFF time is not counted.
Counting starts when the thermostat
becomes ON, and the count then
continues even if the thermostat
becomes OFF.

11. In case of switching from “Heating”
the reversing valve is held for 3
minutes.

12. The defrosting signal is not
accepted with overload input, and
the operation becomes as shown
below when the overload input
disappears.

(1) When previously the defrosting

signal existed without overload
input, defrosting will start
immediately.

(2) In cases other than the above,

defrosting will be executed with
a defrosting signal in the
condition without overload input.

– 43 –

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

5

sec.

1 2 times

2 13 times

3 14 times

4 15 times

––––––

5

––

sec.

5

––

sec.

5

sec.

––

Forced cool operation

Running force-cool operation by
service switch.
Service switch at indoor P.W.B. has
been activated.

IC 401 Data read wrongly

In case that data read from IC401
is wrong.

Heat exchanger thermistor error

Heat exchanger thermistor open or
short-circuit detected.

Room thermistor error

Room thermistor error open or
short-circuit detected.

(1) Service switch at Indoor has

been set to “COOL” position.

(2) Control P.W.B. damaged.

IC401 is not in order.

(1) Thermistor

(2) Indoor - control circuit board.

(1) Thermistor

(2) Indoor - control circuit board.

( – – 0.5 second on, 0.5 second off.)

– 45 –

REFRIGERATION CYCLE

COOLING DEFROST

9.0

11.0

9.0

Strainer

6.35

Charging Pipe

6.35

Reversing
Valve

ø6.35

Comp

9.52

9.52

Suction
Tank

Capillary

4.76

6.35

Outdoor Unit

Service Valve

Service Valve

Strainer

(3/8)

(1/4)

6.35

9.52

6.35

Indoor Unit

Cooling
Defrost

Union

(3/8)

6.35

Union

(1/4)

6.35

9.52

6.35

8.0

HEATING

Reversing
Valve

9.0

11.0

9.0

Strainer

Charging Pipe

6.35

6.35

6.35

Comp

9.52

9.52

Suction
Tank

Capillary

4.76

6.35

Outdoor Unit

Service Valve

Service Valve

Strainer

(3/8)

(1/4)

6.35

9.52

6.35

Indoor Unit

Union

(3/8)

6.35

6.35

Union

(1/4)

9.52

6.35

8.0

– 46 –

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

AUTO DRY

DRY

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.

ONE SWING (CLOSING AIR DEFLECTOR)

1 DOWNWARD

2 UPWARD

INITIALIZE AT NEXT

OPERATION.

INITIALIZE AT NEXT

OPERATION.

STOP

DURING ONE SWING

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.

– 47 –

SERVICE CALL Q & A

Cooling operation

While cooling, the com-

Q1

pressor sometimes stops
abruptly.

Dehumidifying operation

The fan speed does not

Q2

change during a dehumidi­fying operation.

Cold air comes out during

Q3

a dehumidifying
operation.

The operation does not

Q4

stop even by raising the
room temperature setting
of remote control at a
dehumidifying operation.

Check whether frost sticks on

A1

the heat exchanger of unit or
not.
Wait for 3 - 4 minutes until the
frost melts.

The fan speed is always

A2

QUIET at a dehumidifying
operation.

To improve the dehumidifica-

A3

tion efficiency, QUIET fan
speed operation is performed.
Therefore the air is cold. This
is not a trouble.

At a dehumidifying operation,

A4

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 < 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 in 2) is
the case and, therefore, the
operation by the room tempera­ture control is impossible. Turn
off the ON/OFF button, set the
room temperature to a new
value and turn on the operation
by the ON/OFF button.

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

In the dehumidifying mode,

Q5

the remote controller is set
slightly higher than the room
temperature but the opera­tion starts.

This is the status in 2) of (A4).

A5

The temperature is set a little
lower than the room temperature
to carry out a dehumidifying
operation as far as possible.

– 48 –

Heating operation

Air does not come out when

Q6

starting a heating operation.

Air does not come out

Q7

sometimes while in a heating
operation.

The fan speed is set to “HI”

Q8

or “MED” but the heating
operation starts with a LO fan
speed.

The operation stops during

Q9

a heating operation while the
room temperature is set at
“30”.

It is not a trouble. The fan is

A6

stopped to avoid cold wind.

Defrosting is on. Wait for 5–10

A7

minutes until the outdoor unit
is defrosted.

The heating operation starts

A8

with a LO fan speed for 30
seconds. If the fan speed is set
to HI, the operation starts with
LO fan speed, followed by
MED fan speed for 30
seconds and then by HI fan
speed.

If a heating operation is

A9

performed when the exterior
temperature is high, the
operation may stop to protect
the equipment.

When starting the operation,
the heat exchanger is cold
and, therefore, the fan is
stopped.
Wait 2–3 minutes.

Q10

Q11

The outdoor fan does not
move at a heating operation
by the service switch.

Auto fresh defrosting

Heating has been turned off by the main
operation but the “Hot keep lamp” lights and
the outdoor unit operations.

A10

It is not a trouble.
When heating, the outdoor
fan is stopped to avoid
excessive pressure rise.

A11

“Auto fresh defrosting” operates. When
stopping the operation, whether the outdoor
unit is frosted or not is checked and, if in the
affirmative, defrosting is performed before
stopping the operation.

– 49 –

Automatic operation

Q12

Q13

Q14

How is the automatic
operation mode determined?

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

The room temperature
cannot be controlled at an
automatic operation.

A12

A13

A14

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

Cooling:

When room temperature is
approx. 27°C or higher.

Dehumidifying:

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

Heating:

When room temperature is
approx. 23°C or lower.

The fan speed is automati­cally determined.

It is automatically set as
follows.

At cooling: Set at 27°C

At dehumidifying:

The room temperature
setting can be raised 3°C by

V

“” or lowered 3°C by “ V ”.

Set slightly
lower than room
temperature

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. 27°C or
higher.

– 50 –

Dehumidifying:

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

Heating: When room

temperature is
approx. 23°C or
lower.

Common, etc.

Q15

Q16

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

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

A15

A16

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, adjust
the set temperature to keep
living space at a comfortable
temperature.

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

Wireless remote controller

Q17

1) When the “Automatic”
operatoin 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
develope transmit mark
“” and sounds a
receive sound but does
not display the room
temperature setting.

A17

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.

At heating
Set at 23°C.

3) At an “Automatic”
operation, the room
temperature setting is not
displayed.
However, every pressing

V

“ ” or “ V ” button changes
1°C within the range of:
27±3°C when cooling
23±3°C when heating

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.

– 51 –

Wireless remote controller

Q18

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

The

A18

V

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

Q19

Q20

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

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

A19

A20

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

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

“Dehumidifying”

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

– 52 –

PARTS LIST AND DIAGRAM

MODEL RAS-07CH4, RAS-09CH4

12

1

6

5

4

11

3

2

17

21

14

7

27

22

20

26

9

8

30

13

20

– 53 –

25

23

24

29

MODEL RAS-07CH4

NO.

1 PMRAS-07CH4 001 1 CABINET

2 PMRAS-07CH4 004 1 LOW-COVER

3 PMRAS-07CH2 018 1 10W MOTOR

4 PMRAS-09C1 003 1 TANGENTIAL FLOW FAN

5 PMRAS-05C 013 1 P-BEARING ASSEMBLY

6 PMRAS-05C 004 1 BEARING COVER

7 PMRAS-26CHAI 001 1 FAN MOTOR SUPPORT

9 PMRAS-07CH4 002 1 DRAIN PAN ASSEMBLY

11 PMRAS-07CH4 003 1 FRONT COVER ASSEMBLY

12 PMRAS-05C 009 1 MOUNTING PLATE

13 PMRAS-07CH4 006 1 REMOTE CONTROL

14 PMRAS-07CH2 014 1 CYCLE ASSEMBLY

17 PMRAS-05C 041 1 STEP MOTOR

RAS-07CH4

Q’TY / UNIT PARTS NAME

PART NO.

20 PMRAS-07CH2 003 1 PWB (MAIN AND INDICATION)

21 PMRAS-07CH4 005 1 PWB (POWER)

22 PMRAS-07CH4 007 1 TRANSFORMER

23 PMRAS-07CH2 006 1 TERMINAL (2P)

24 PMRAS-07CH2 007 1 TERMINAL (2P WITH THERMAL FUSE)

25 PMRAS-18CP2R 002 1 POWER SWITCH

26 PMRAS-07CH2 008 1 THERMAL FUSE FOR PWB

27 PMRAS-07CH2 012 1 THERMISTOR

29 PMRAS-10C3M 003 1 REMOTE CONTROL HOLDER

30 PMRAS-07CH4 008 1 UV LED UNIT

– 54 –

MODEL RAS-09CH4

NO.

1 PMRAS-07CH4 001 1 CABINET

2 PMRAS-07CH4 004 1 LOW-COVER

3 PMRAS-07CH2 018 1 10W MOTOR

4 PMRAS-09C1 003 1 TANGENTIAL FLOW FAN

5 PMRAS-05C 013 1 P-BEARING ASSEMBLY

6 PMRAS-05C 004 1 BEARING COVER

7 PMRAS-26CHAI 001 1 FAN MOTOR SUPPORT

9 PMRAS-07CH4 002 1 DRAIN PAN ASSEMBLY

11 PMRAS-07CH4 003 1 FRONT COVER ASSEMBLY

12 PMRAS-05C 009 1 MOUNTING PLATE

13 PMRAS-07CH4 006 1 REMOTE CONTROL

14 PMRAS-07CH2 014 1 CYCLE ASSEMBLY

17 PMRAS-05C 041 1 STEP MOTOR

RAS-09CH4

Q’TY / UNIT PARTS NAME

PART NO.

20 PMRAS-09CH2 001 1 PWB (MAIN AND INDICATION)

21 PMRAS-07CH4 005 1 PWB (POWER)

22 PMRAS-07CH4 007 1 TRANSFORMER

23 PMRAS-07CH2 006 1 TERMINAL (2P)

24 PMRAS-07CH2 007 1 TERMINAL (2P WITH THERMAL FUSE)

25 PMRAS-18CP2R 002 1 POWER SWITCH

26 PMRAS-07CH2 008 1 THERMAL FUSE FOR PWB

27 PMRAS-07CH2 012 1 THERMISTOR

29 PMRAS-10C3M 003 1 REMOTE CONTROL HOLDER

30 PMRAS-07CH4 008 1 UV LED UNIT

– 55 –

MODEL RAC-07CH4, RAC-09CH4

50

30

11

10

16

31

2

1

3

4

52

6

7

51

13

15

14

5

9

12

8

18

17

– 56 –

MODEL RAC-07CH4

NO.

1 PMRAC-07CH2 906 1 OVERLOAD PROTECTOR

2 RA-226 015 1 O.L.R. COVER

3 RA-226 016 1 COVER SUPPORT

4 PMRAC-05CV 901 1 FAN MOTOR SUPPORT

5 PMRAC-07G1 902 1 FAN MOTOR 20W

6 PMRAC-05CV 903 1 PROPELLER FAN

7 PMRAC-07CH2 901 1 CABINET

8 PMRAC-07CH2 902 1 ELECTRICAL COVER ASSEMBLY

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-07CH4 901 1 COMPRESSOR 600W 10KG

RAC-07CH4

Q’TY / UNIT PARTS NAME

PART NO.

14 RAC-2226HV 805 3 COMPRESSOR RUBBER

15 KPNT1 001 3 PUSH NUT

16 PMRAC-26CHA1 901 1 CONDENSER

17 PMRAC-26CHA1 902 1 2S-VALVE

18 PMRAC-10C7 906 1 3S-VALVE

30 PMRAC-10C8 905 1 FAN MOTOR CAPACITOR (1.5µF, 440V)

31 PMRAC-07CV1 006 2 TERMINAL BOARD (2P)

50 PMRAC-10C8 904 1 COMPRESSOR CAPACITOR (30µF, 440V)

51 PMRAC-07CH2 904 1 REVERSING VALVE

52 PMRAC-07CH2 905 1 COIL (REVERSING VALVE)

– 57 –

MODEL RAC-09CH4

NO.

1 PMRAC-09CH2 901 1 OVERLOAD PROTECTOR

2 RA-226 015 1 O.L.R. COVER

3 RA-226 016 1 COVER SUPPORT

4 PMRAC-05CV 901 1 FAN MOTOR SUPPORT

5 PMRAC-07G1 902 1 FAN MOTOR 20W

6 PMRAC-05CV 903 1 PROPELLER FAN

7 PMRAC-07CH2 901 1 CABINET

8 PMRAC-07CH2 902 1 ELECTRICAL COVER ASSEMBLY

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-09CHV1 901 1 COMPRESSOR 750W 10KG

RAC-09CH4

Q’TY / UNIT PARTS NAME

PART NO.

14 RAC-2226HV 805 3 COMPRESSOR RUBBER

15 KPNT1 001 3 PUSH NUT

16 PMRAC-26CHA1 901 1 CONDENSER

17 PMRAC-26CHA1 902 1 2S-VALVE

18 PMRAC-10C7 906 1 3S-VALVE

30 PMRAC-10C8 905 1 FAN MOTOR CAPACITOR (1.5µF, 440V)

31 PMRAC-07CV1 006 2 TERMINAL BOARD (2P)

50 PMRAC-10C8 904 1 COMPRESSOR CAPACITOR (30µF, 440V)

51 PMRAC-07CH2 904 1 REVERSING VALVE

52 PMRAC-07CH2 905 1 COIL (REVERSING VALVE)

– 58 –

RAS-07CH4 / RAC-07CH4

PM NO. 0205E

RAS-09CH4 / RAC-09CH4

– 59 –

Printed in Malaysia