Hitachi RAS-07GH4, RAC-07GH4, RAS-09GH4, RAC-14GH4, RAS-14GH4 Service Manual

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Page 1

NO. 0193E

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

ROOM AIR CONDITIONER

INDOOR UNIT + OUTDOOR UNIT

DECEMBER 2003

Refrigeration & Air-Conditioning Division

SERVICE MANUAL

REFER TO THE FOUNDATION MANUAL

TECHNICAL INFORMATION

FOR SERVICE PERSONNEL ONLY

(W)

(A)

(kW)

(B.T.U./h)

(W)

(A)

(kW)

(B.T.U./h)

(kg)

(WALL TYPE)

TYPE

MODEL

POWER SOURCE

TOTAL INPUT

TOTAL AMPERES

CAPACITY

TOTAL INPUT

TOTAL AMPERES

CAPACITY

DIMENSIONS (mm)

NET WEIGHT

SPECIFICATIONS

CONTENTS

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

HOW TO USE ---------------------------------------------------------- 6

CONSTRUCTION AND DIMENSIONAL DIAGRAM ------- 29

MAIN PARTS COMPONENT ------------------------------------- 31

WIRING DIAGRAM -------------------------------------------------- 33

CIRCUIT DIAGRAM ------------------------------------------------- 35

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 ---------------------------------------- 53

SERVICE CALL Q & A -------------------------------------------- 54

PARTS LIST AND DIAGRAM ------------------------------------ 63

RAS-07GH4 / RAC-07GH4 RAS-09GH4 / RAC-09GH4 RAS-14GH4 / RAC-14GH4

COOLING

HEATING

INDOOR UNIT

RAS-07GH4

780

280

210

9.0

After installation

RAS-07GH4 RAS-09GH4 RAS-14GH4

RAC-14GH4

RAC-07GH4 RAC-09GH4

OUTDOOR UNIT

RAC-07GH4

INDOOR UNIT

RAS-09GH4

OUTDOOR UNIT

RAC-09GH4

INDOOR UNIT

RAS-14GH4

OUTDOOR UNIT

RAC-14GH4

700

570

210

750

570

280

780

280

210

9.0

700

570

210

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

490-510-530

2.30-2.30-2.30

2.20

7,500

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

890-900-950

4.20-4.10-4.10

2.90

9,900

740-770-810

3.50-3.50-3.50

3.00

10,230

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

1060-1090-1120

5.00-5.00-4.90

3.50

11,940

960-1000-1050

4.60-4.60-4.60

3.85

13,140

Page 2

– 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.

Page 3

– 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.

Fig. 2. Body Earth

Body earth (Elimik conductive band)

Clip for connection with a grounding wire

A conductive polyvinyl bag

Conductive sponge

Page 4

– 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

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

Page 5

– 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 near by, 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).

6. This room air conditioner (the reverse cycle) should not be used when the outside temperature is below

–10°C (14°F). If the reverse cycle is used under this condition, the outside heat exchanger is frosted and efficiency falls.

7. When the outside heat exchanger is frosted, the frost is melted by operating the hot gas system, it is not

trouble that at this time fan stops and the vapour may rise from the outside heat exchanger.

CAUTION

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– 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-07GH4 RAS-09GH4 RAS-14GH4

20 W

–

3.15A

G4A

YES

450NR

---------

YES(IC)

YES

---------

20 W 30 W

1.5μF, 450 VAC

2.5μF, 450VAC

20μF, 450 VAC

25μF, 450 VAC

YES

10 A 15 A

1050g

10m

UNIT

MAX. PIPES

REFRIGERANT CHARGING VOLUME (Refrigerant 410A)

RAC-07GH4 RAC-14GH4RAC-09GH4

5RS080

5RS132

650g600g

5RS112

15m

WITHOUT REFRIGERANT BECAUSE COUPLING IS FLARE TYPE

Page 7

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MODEL RAS-07GH4 / RAC-07GH4 and RAS-09GH4 / RAC-09GH4

Figure showing the installation of Indoor anf Outdoor unit

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

CAUTION

above 50mm

above 100mm

above

0.45m

above 300mm

must not bend

above 100mm

2,300mm or more

Maximum pipe length 10m

Minimum pipe length 5m

Plug

above 100mm

❈ above 300mm

above 200mm

❈ above 100mm

❈ give clearance

as wide as possible

above 50mm when installed on the ceiling of balcony

above 200mm

● 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 wrapped with vinyl tape. (The insulator will deteriorate if it is not wrapped with tape).

The connection of insulated drain hose.

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

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

inner diameter ø 16mm

– 5a –

Page 8

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MODEL RAS-14GH4 / RAC-14GH4

Figure showing the installation of Indoor anf Outdoor unit

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

CAUTION

above 50mm

above 100mm

above

0.45m

above 300mm

must not bend

above 100mm

2,300mm or more

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

give clearance as wide as possible

Plug

● 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 wrapped with vinyl tape. (The insulator will deteriorate if it is not wrapped with tape).

The connection of insulated drain hose.

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

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

inner diameter ø 16mm

– 5b –

Page 9

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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 the unit near a 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.

A R N

●

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.

A R N

I N G

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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 place plants directly under the air flow as it is bad for the plants.

●

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 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.

Page 11

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INDOOR UNIT

NAMES AND FUNCTIONS OF EACH PART

Air filter

To prevent dust from coming into the indoor unit. (Refer page 25)

Front panel

Indoor unit indicators

Light indicator showing the operating condition. (Refer page 9)

Horizontal deflector

●

Vertical deflector

(Air Outlet)

(Refer page 20)

Remote controller

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 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-07GH4/09GH4/14GH4

RAC-07GH4/09GH4

RAC-14GH4

HEIGHT (mm)

280

570

DEPTH (mm)

210

280

MODEL NAME AND DIMENSIONS

CAUTION

• When heating operation, drain or defrosted water flows out from outdoor unit. Don’t close drain outlet portion

in chilly area so as not to freeze these.

RAC-07GH4 RAC-09GH4

RAC-14GH4

Page 12

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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 to indicate that it is time to clean the filter. The lamp goes out when the POWER SWITCH set to OFF and ON again.

OPERATION LAMP

This lamp lights during operation. The OPERATION LAMP flashes in the following cases during heating.

(1) During preheating

For about 2–3 minutes after starting up.

(2) During defrosting

Defrosting will be performed about once every one hour when frost forms on the heat exchanger of the outdoor unit, for 5–10 minutes each time.

TIMER LAMP

This lamp lights when the timer is working.

TEMPORARY SWITCH

Press

Temporary Switch

Non-conductor Stick

Page 13

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AUTO

HEAT

DEHUMIDIFY

COOL

FAN

FAN SPEED LOW MED HI

SLEEPING

STOP (CANCEL)

START (RESERVE)

START/STOP

TIME

TIMER SET

TIMER SELECTOR ON TIMER OFF TIMER

AUTO SWING

RESET

NAMES AND FUNCTIONS OF REMOTE CONTROL UNIT

REMOTE CONTROLLER

● This controls the operation of the indoor unit. The range of control is about 7 meters. If indoor lighting is

controlled electronically, the range of control may be shorter. This unit can be fixed on a wall using the fixture provided. Before fixing it, make sure the indoor unit can be controlled from the remote controller.

● Handle the remote controller with care. Dropping it or getting it wet may compromise its signal transmission

capability.

● After new batteries are inserted into the remote controller, the unit will initially require approximately 10

seconds to respond to commands and operate.

● Signal emitting window/transmission sign

Point this window toward the indoor unit when controlling it. The transmission sign blinks when a signal is sent.

● Display

This indicates the room temperature selected, current time, timer status, function and intensity of circulation selected.

● START/STOP button

Press this button to start operation. Press it again to stop operation.

● SLEEP button

Use this button to set the sleep timer.

● TEMPERATURE buttons

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

● TIME button

Use this button to set and check the time and date.

● RESET buttons

● FUNCTION selector

Use this button to select the operating mode. Every time you press it, the mode will change from (AUTO) to (HEAT) to (DEHUMIDIFY) to

(COOL) and to (FAN) cyclically.

● FAN SPEED selector

This determines the fan speed. Every time you press this button, the intensity of circulation will change from (AUTO) to (HI) to (MED) to (LOW) (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.

Page 14

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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.

■ 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, HEAT, COOL or DEHUMIDIFY depending on the initial room temperature.

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

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

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

● The preset temperature and the actual room temperature may vary

somewhat depending on conditions.

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

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

START

STOP

°C

RESET

Over 27°C COOL

23~27°C

Under 23°C HEAT

Temperature settingFunction

27°C

23°C

Slightly lower than the room temperature

LOW

FAN SPEED

HI at start, MED or LOW after the preset temperature is reached

DEHUMIDIFY

Initial room temperature (approx.)

■ Condition of Automatic Operation

Page 15

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HEATING OPERATION

● Use the device for heating when the outdoor temperature is under 21°C.

When it is too warm (over 24°C), the heating function may not work in order to protect the device.

● In order to keep reliability of the device, please use this device above –10°C of the outdoor temperature.

Press the FUNCTION selector so that the display indicates (HEAT).

Set the desired FAN SPEED with the (FAN SPEED) button (the display indicates the setting).

(AUTO): The fan speed is HI at first and varies to MED

automatically when the preset temperature has been reached.

(HI) : Economical as the room will become warm

quickly. But you may feel a chill at the beginning.

(MED) : Quiet.

(LOW) : More quiet.

Set the desired room temperature with the TEMPERATURE buttons (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.

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

■ As the settings are stored in memory in the remote controller, you only have to press the (START/STOP) button next time.

START

STOP

RESET

Page 16

– 13 –

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.

■ 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.

Set the desired room temperature with the TEMPERATURE button (the display indicates the setting).

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

Press the (START/STOP) button. Dehumidifying operation

starts with a beep. Press the button again to stop operation.

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

only have to press the

(START/STOP) button next time.

START

STOP

Press the FUNCTION selector so that the display indicates

(DEHUMIDIFY). The FAN SPEED is set at LOW automatically. The FAN SPEED button does not work.

Page 17

– 14 –

RESET

COOLING OPERATION

Use the device for cooling when the outdoor temperature is 22-42°C. If indoor humidity is very high (over 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.

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

only have to press the

(START/STOP) button next time.

START

STOP

Page 18

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FAN SPEED (AUTO)

.....

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

For the heating operation

● The fan speed will automatically change according to the temperature

of discharged air.

● When the difference of room temperature and setting temperature is

large, fan starts to run at HI speed.

● When the room temperature reaches setting temperature, fan speed

changes to LOW automatically.

● 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

Page 19

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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.

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.

Set the current month and

day with the TIMER control button.

Press the (OFF-TIMER)

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

Press the (ON-TIMER)

button the (ON) mark blinks on the display.

Set the turn-off time

with the TIMER control button. Press the (RESERVE) button.

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

STOP

Start

Stop

Start Stop

RESET

Page 20

– 17 –

Point the signal window of the remote controller toward the indoor unit, and

press the (RESERVE) button. The (OFF) mark starts lighting instead of flashing and the sign (RESERVED) lights. A beep occurs and the (TIMER) lamp lights on the indoor unit.

● The time indication will disappear

automatically in 10 second.

● To check the current time setting,

press the (TIME) button twice.

The setting of the current time is now complete.

● The timer may be used in three ways: off-timer, on-timer, and ON/OFF (OFF/ON)-timer. Set

the current time at first because it serves as a reference.

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

the (RESERVE) button in order to use the same settings next time.

Press the

(TIME) button.

Set the current time with the

TIMER control button.

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

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.

Set the turn-on time with the

TIMER control button.

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.

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.

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.

Press the (TIME) button again.

The time indication starts lighting

instead of flashing.

PM PM

Page 21

– 18 –

HOW TO SET THE SLEEP TIMER

Set the ON-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

Sleep timer

Indication

1 hour 2 hours 3 hours 7 hours

Sleep timer off

44 44

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.

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

Sleep

timer

Start

Page 22

– 19 –

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 60 minutes after the setting of the sleep timer.

Fan

“ ”

Heating

“ ”

The room temperature will be controlled 5°C below the temperature and the FAN SPEED will be set to LOW setting 60 minutes after the setting of the sleep timer.

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 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.

NOTE

Sleep timer set

60 minutes later

3 hours later

7 hours later

2 hours later

6 hours later

2°C

Page 23

– 20 –

ADJUSTING THE AIR DEFLECTOR

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.

Vertical

about 15

about 60

about 45

about 30

When cooling, dehumidifying

When heating

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.

RESET

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.

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.

Page 24

– 21 –

HOW TO EXCHANGE THE BATTERIES IN THE REMOTE CONTROLLER

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.

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

Page 25

– 22 –

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

Page 26

– 23 –

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

Caution

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

Inverter-type fluorescent lamp.

To prevent interference, place at least 1m away.

Page 27

– 24 –

ATTACHING THE AIR CLEANSING AND DEODORIZING FILTERS

Open the front panel.

● Pull up the front panel by holding it at both

sides with both hands.

Remove the filter.

● Push upward to release the claws and pull out

the filter.

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.

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

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.

Page 28

– 25 –

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

Open the front panel and remove the filter

● Gently lift and remove the air cleansing and

deodorizing filter from the air filter frame.

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.

● 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.

Page 29

– 26 –

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

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

Page 30

– 27 –

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

CAUTION

Confirm

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.

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).

Page 31

– 28 –

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.

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 Minimum Maximum

Indoor

Dry bulb °C21 32 20 27

Wet bulb °C15 23 12 19

Outdoor

Dry bulb °C21 43 2 21

Wet bulb °C15 26 1 15

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:

Cooling Heating

Page 32

– 29 –

CONSTRUCTION AND DIMENSIONAL DIAGRAM

MODEL RAS-07GH4/09GH4/14GH4

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-14GH4), 10m (RAS-07GH4/RAS-09GH4)

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 2.5mm dia. x 3 (AB Line), 1.6mm dia. x 2 (CD Line) is used for the connection.

DCBA

L N

D C B A

Indoor Unit

Outdoor Unit

Connecting Cord

ø1.6 or ø2.0

ø2.0

Line cord

RED BRN

WHT BLK

Power cord

Connecting cord

Drain hose

Approx 370 Approx 70 Narrow pipe (06.35)

Wide pipe (09.52)

Mounting plate

210

780

280

Discharge grill

Top air suction grill

205

Top air suction grill

Front panel

Approx 108

Drain pan

Drain cap connection port

H-deflector

Indoor unit service space

(190)

400

400 (190)

7070

30 60

22 60 81.5

V-deflector

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)

Page 33

– 30 –

MODEL RAC-07GH4 / RAC-09GH4

MODEL RAC-14GH4

Air outlet

Handle

Air inlet

(18)

490

Handle

Viewed from P

157

245

225

500

570

428

700

243

236 210 10

482

517

135

500

124

16556

28 750

852

570

166

559

2616 280

195

280

340

320

Page 34

– 31 –

MAIN PARTS COMPONENT

THERMOSTAT (Room Temperature Thermistor)

Thermostat Specifications

FAN MOTOR

Fan Motor Specifications

CONNECTION

INDICATION

MODEL RAS-07GH4/09GH4/14GH4

THERMOSTAT MODEL IC

OPERATION COOL HEAT

ON 16.6 (61.9) 18.7 (65.6)

OFF 16.0 (60.8) 19.3 (66.7)

ON 24.6 (76.3) 26.7 (80.1)

OFF 24.0 (75.2) 27.3 (81.1)

ON 32.6 (90.7) 34.2 (94.5)

OFF 32.0 (89.6) 35.3 (95.5)

MODEL RAS-07GH4/09GH4/14GH4

RAC-07GH4/09GH4/14GH4

PHASE

RATED VOLTAGE

– – – – –

SINGLE

RATED FREQUENCY

DC35V

220-240V

TEMPERATURE °C (°F)

OUTPUT

POLE NUMBER

– – – – –

20 W

20W 30W 30W

– – – – –

50 Hz

35V

RED

YELLOW

BLUE

BLACK

CAPACITOR

RED

INTERNAL THERMAL FUSE

GRAY

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

Page 35

– 32 –

MODEL RAC-07GH4/09GH4/14GH4

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

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.

RM = 5.233

RA = 5.621

EXTERNAL OVERLOAD RELAY

INTERNAL PROTECTOR

YES

ORANGE

WHITE

RED

CAPACITOR

S (RED)

C (WHITE)

M OR R (ORANGE)

RAC-07GH4 / RAC-09GH4 / RAC-14GH4

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

Page 36

– 33 –

WIRING DIAGRAM

MODEL RAS-07/09/14GH4 // RAC-07/09/14GH4

RAS-63CHA1/RAC-63CHA1

Page 37

– 35 –

CIRCUIT DIAGRAM

Remote Control

SEG19

SEG18

SEG17

SEG16

SEG21

SEG24

SEG25

SEG26

SEG27

SEG28

SEG20

SEG5

SEG0

SEG1

SEG2

SEG3

SEG4

SEG5

SEG6

SEG7

COM3

COM2

COM1

COM0

SEG14

SEG13

SEG12

SEG11

SEG13

SEG9

SEG8

48 47

41 42

17 18

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

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-504FP

LCD 1

50v/1u

K 1

RB425D(1/2)

K2K3

P10

P11

P12

K7 K8

K8 K10

K11K12

K18

K17

K15 K16

K13 K14

100k

SW1

100k

2SC3443

or 2SC2982

D2D1

D1 D2

EL-1L7

(1/2)

RB425D

R10

12M

K19

R11

R15

R16

R13

R14

910kHz

105

104

150k

kHz

18p

22p

R12

220k

220K

220k

100k

32.768

220p

334

R6 R9

24(1/8W)

330

SW-187-2P

Key matrix table

P10

Input

Output

D0 D1

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

Page 38

– 37 –

PRINTED WIRING BOARD LOCATION DIAGRAM

MODEL RAS-07GH4/09GH4/14GH4 // RAC-07GH4/09GH4/14GH4

Page 39

– 39 –

BLOCK DIAGRAM

MODEL RAS-07GH4/RAS-09GH4/RAS-14GH4 // RAC-07GH4/RAC-09GH4/RAC-14GH4

INDOOR UNIT

POWER SUPPLY

POWER RELAY

STICK 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

OUTDOOR

FAN MOTOR

RELAY

POWER RELAY

STICK RELAY

REVERSING

VALVE RELAY

EXTERNAL FAN

RELAY

BUZZER CIRCUIT

OPERATION

TIMER

FILTER

INDICATION

LAMP

AUTO SWEEP MOTOR

MICROCOMPUTER

CLOCK CIRCUIT

INITIALIZING

CIRCUIT

RESET

CIRCUIT

MICROCOMPUTER

(AX-3U)

F M

REVERSING

VALVE

R V

Page 40

15 sec

30 sec

15 sec

30 sec

15 sec

30 sec

+3+2+1-1-2-3-4

Set temperature

Start/stop switch

Fan relay H

Fan relay L

Fan relay S

Power relay

Stick relay

External fan relay

Reversing valve relay

Pilot lamp

Hot keep lamp

2 sec

30 sec

-1-2-3

-4

0.66 deg

0.33 deg

Set temperature

Start/stop button

Fan Speed S

Power relay

Stick relay

Operation lamp

30 sec

2 sec

5 sec

2 sec

External fan relay

30 sec

2 sec

+3+2+1

-1-2-3

(Set temperature) +

(Temperature shift amount)

Start/stop button

Fan relay S

Power relay

Stick relay

Operation lamp

S S S

5 sec

2 sec

5 sec

2 sec

External fan relay

30 sec

2 sec 2 sec2 sec

+3+2+1

-1-2-3

Set temperature

Start/stop button

Fan relay H

Fan relay L

Fan relay S

Power relay

Stick relay

External fan relay

Operation lamp

H S L S L H S

S L L

Start/stop button

Fan relay H

Stick relay

Start/stop button

Operation lamp

Start/stop button

Reservation

Cancel

Operation lamp

Timer lamp

Timer memory

(OFF timer during stop) (Cancel)

(Change of the reservation time)

Start/stop button

Reservation

Cancel

Operation lamp

Timer lamp

Timer memory

(ON timer during operation)

(Cancel)

(Change of the reservation time)

Start/stop button

Reservation

Cancel

Operation lamp

Timer lamp

Timer memory

(OFF ON timer)

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

(OFF ON timer during stop)

PM1:00 PM3:00 PM5:00

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

Operation mode

Control function

Fan Cooling Sensor dehumidification Heating Automatic

Start/stop button,

basic mode

Timer

operation

ON timer

OFF timer

OFF

→

timer

Automatic

MED

•

Operation in the previous

circulation mode•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

Circulation

mode

Thermostat operation

→

MED

→

• The power relay is

delayed by 2 seconds

from the start of

thermostat operation.

(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 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).

Air-blow mode (A) (B)

HL H

LL L

SS L

Automatic L

•

“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.

•

The “Automatic” speed mode

for each operation mode is used

independent of the setting.

(“Week” at the time of “Sensor

dehumidification”.)•The operation mode at the

start of operation differs as

shown below according to

the room temperature.

• 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 min. after

stop with 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 dehumidifica-

tion” mode.

(2) Set temperature is higher than room temperature.

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

temperature.

Example for “HI” circulation mode

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.

BASIC MODE

MODEL RAS-07GH4/09GH4/14GH4 // RAC-07GH4/09GH4/14GH4

•

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.

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.

Heating The set temperature

shall be 23°C +

temperature shift

amount.

No.

(0.5)

(0.5) (0.5)

(0.5)

1 sec

(1 sec)

Fan relay H

Power relay

Stick relay

External fan relay

Reversing fan relay

Timer relay

Indoor heat exchanger

thermistor temperature

Low-temperature input

T8T9T6T7T5T3T4

TEMPERATURE OF INDOOR HEAT

EXCHANGER THERMISTOR

PD CUT 1

PD CUT 2

PD CUT 3

FAN RELAY H

FAN RELAY L

POWER RELAY

STICK RELAY

EXTERNAL FAN RELAY

REVERSING VALVE RELAY

Reversing valve lock protection

AIR BLOW CHANGE TO "H" FORCILY WHEN ENTERING "PD CUT 2"

AIR BLOW CAN BE CHANGED BY REMOTE CONTROL AFTER TEMP. T

AIR BLOW RETURNS TO THE SET SPEED AT T

•

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.

•

Recovery at the time of stop by

low-temperature input is reset

recovery.•The timer lamp flashes at the

time of stop.

– 41 –

Heating load reduction and Pd cut

Room temperature

at the start of

operation

➜

Page 41

– 43 –

Set

temperature

Start/stop switch

Sleep key

Operation lamp

Timer lamp

60 minutes

5 deg down

LO (sleep operation)

Set circulation

velocity

Set

temperature

Start/stop switch

Sleep key

Operation lamp

Sleep key

Timer lamp

60 minutes

5 deg down

LO (slee

p operation)

Set circulation

velocity

Start/stop switch

Thermostat signal

Preheating signal

Fan relay H

Fan relay L

Fan relay S

Power relay

Hot ke

ep lamp

2 sec

3 minutes

30 sec 30 sec

15sec

30 sec 30 sec

"Strong" circulation

2 sec

15 sec

15 minutes-T

30 sec

Completion

Defrosting

start

30 sec

2 sec

10 sec

Start/stop switch

Defrosting signal

Preheating signal

Fan relay H

Fan relay L

Fan relay S

Power relay

Stick relay

External fan relay

Reversing valve relay

Heater relay

Operation lamp

Hot keep lamp

2 sec

10 sec

30 sec 60 sec

3 minutes

30 sec

60 sec

15 sec

Indoor heat exchanger

thermistor temperature

Fan relay H

Power relay

Stick relay

Outside fan relay

Operation lamp

Fan relay S

Power relay

Stick relay

Outs

ide fan relay

Operation lamp

Min. 3 minutes

Set circulation velocity

Set

temperature

Start/stop switch

Sleep key

Operation lamp

Timer lamp

60 minutes

2 d

eg up

LO (sleep operation)

Control function

Operation mode

Fan Cooling Sensor dehumidification Heating Automatic

•

Sleep operation is executed

for each operation mode.•Sleep operation is executed

for each operation mode.•At the time of heating

operation mode, the same

operation as for heating

is executed.

•

Defrosting of each operation

mode is executed.

•

The operation is

switched OFF

at the set time.

Preheating

operation

Defrosting

(including automatic

fresh defrosting).

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.

•

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

•

When the sleep key is switched on during ON after a timer reservation, sleep operation will be started.

Notes:

•

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.

(Reverse cycle defrosting)

10 min.

min.

(Silencing period)

30 sec

(Cycle balancing time)

30 sec

(Defrosting prohibition

time)

50 min.

min.

-5

-1

•

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 TA has continued for the time

shown in the table on the left, the operation advances to TB and TC

independent of the defrosting signal.

•

When the power relay becomes ON after expiration of the time TE,

defrosting will be started immediately with input of the defrosting signal.

•

Once defrosting has been completed, the defrosting signal is not

accepted for the time TE.

•

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

by means of the start/stop switch or at the time of OFF timer count-up,

defrosting is executed before operation stop.

•

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

Sensor dehumidification

Cooling strong

No.

•

The set temperature

after sleep shift in

sensor dehumidification

operation is limited

by 16°C.

Automatic

Heating

Fan

Sensor

dehumidification

Cooling

Heating

Cooling

Yes

Yes (automatic)

Yes

YesNoYes

Yes

Cooling/Heating

Item

Operation switching

Temporary switch

Service switch

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

dehumidification

Automatic blowing direction

Filter sign

Wireless mode

Item

Cooling, Sensor 16 16.6

ON temperature dehumidification 24 24.6

Thermostat (Thermostat relay) 32 32.6

operation power relay Heating 16 18.7

(°C) 24 26.7

32 34.7

Differential (°C) 0.33

–

Low-temperature (T1) ON (°C) 1.0

defrosting Reset (°C) 12.0

Preheating Reset (°C) 17.0

ON (°C) 15.0

–

Pd cut 1 (T3) ON (°C) 50.0 42

(T4) Reset (°C) 47.0 38

Pd cut 2 (T6) ON (°C) 63.0

(T7) Reset (°C) 57.0

(T5) Fan Relay H [ Original (°C) 43.0

Pd cut 3 (T8) ON (°C) 71.0

(T9) Reset (°C) 63.0

Table 1 Specifications

Table 2 Sensor operation values

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

→ 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 dehumidifica-

tion”. The same also applies for

“Automatic” sensor dehumidifica-

tion, cooling “Sensor dehumidifica-

tion”, “Cooling”.

7. The filter sign lights after operation

of the indoor fan for 100 hours.

The time is cleared when power

switch set to OFF and ON again.

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 50 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.

RAS-07GH4/09GH4 RAS-14GH4

Page 42

● 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.

Item

3-way AUTO (Swing)

Specification

Cooling/

dehumidi-

fying

Heating

(When the

operation

switch is

turned off

Automatic

shut

operation)

Air

blowing

direction

control

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 lamp goes

out when the 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 1 minute if OT is not zero.

Heating Cooling

(MT) 00 ~ 60 min. 00 ~ 60 min.

(OT) 00 ~ 60 min. 00 ~ 60 min.

(HT) –60 ~ 60 min. –60 ~ 60 min.

Obtain OT (moved-up time depending on the temperature difference)

from the table below.

“NICE

TEMPERA-

TURE”

reservation

Heating Cooling

Setting temp.

–

Room temp. Time (min.) Setting temp.

–

Room temp. Time (min.)

00 – 01.00 00 00.00 – 02.00 00

01.25 – 03.00 10 02.25 – 05.00 15

03.25 – 07.00 20 05.25 – 08.00 30

07.25 – 10.00 30 08.25 – 11.00 45

10.25 – 13.00 40 11.25 – 60

13.25 – 16.00 50

16.25 – 19.00 60

19.25 – 22.00 60

22.25 –

❈ 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.

(Heating)

When the room temperature < Set value + compensation shift, it

is regarded to be “attained” and 5 minutes are reduced from the

compensation time.

(Cooling)

When the room temperature < Set value + compensation shift, it’s

operated same as above.

“Not attained” check

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

(Heating)

When the room temperature < Set value + compensation shift 1°C,

it is regarded to be “Not attained” and 5 minutes are added to the

compensation time.

(Cooling)

When the room temperature > Set value + compensation shift

+1°C, it’s operated same as above.

❈ 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)

RAS-07/09/14GH4

16 16.6

24 24.6

32 32.6

0.33

ON (°C) 1.0

Reset (°C) 12.0

Table 2 Sensor operation values

Item RAS-07/09/14GH4

Automatic Yes

Heating Yes

Operation switching Sensor dehumidification Yes

Cooling Yes

Fan Yes

Temporary switch Yes (automatic)

Service switch Cooling Yes

Nice temperature reservation Yes

Defrosting Yes

Sleep circuit Yes

Heater operation at the time of sensor dehumidification No

Automatic blowing direction Yes

Filter sign Yes

Wireless mode Heat and Cool wireless

Table 1 Specifications

Down

❈ Swing start direction

Down

❈ Swing start direction

Page 43

– 47 –

REFRIGERANT CYCLE DIAGRAM

MODEL RAS-07GH4/RAC-07GH4

2S—VALVE

STRAINER

HEATING & COOLING CAPILLARY

STRAINER

CHARGING PIPE

COMP

CONDENSER

REVERSING VALV E

S — TANK

3S — VALVE

EVAPORATOR

MODEL RAS-09GH4/RAC-09GH4

COMP

CONDENSER

REVERSING VALV E

HEATING CAPILLARY

STRAINER

CHARGING PIPE

CHECK VALVE

STRAINER

HEATING & COOLING CAPILLARY

S-TANK

3S-VALVE

2S-VALVE

EVAPORATOR

Page 44

– 48 –

MODEL RAS-09GH4/RAC-09GH4

HEATING CAPILLARY

STRAINER

CHARGING PIPE

HEATING & COOLING CAPILLARY

EVAPORATOR

2S — VA LVE

3S — VALVE

S — TANK

COMP

CONDENSER

REVERSING VALV E

ACCUMULATOR

STRAINER

CHECK VALVE

Page 45

– 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

Page 46

– 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, ZD511 is turned ON, the potential of Q511’s base rises and Q511 is turned ON. Since Q511’s collector is set to “LO” at this time, Q512 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, ZD511

is turned OFF, then Q511 is turned OFF, Q512 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

DC12V Line

DC5V Line

Base

POWER OFF

Micro computer Pin 26

12V

Q511

C512

Micro computer

(AX-3U)

RES

Q512

R511

R514

ZD511

R513

R515

R512

C511

Page 47

– 51 –

3. Buzzer Circuit

Micro computer

(AX-3U)

BUZZER

BZ1

12V

R801

Q302

B.Z

When the buzzer is to be activated, buzzer output pin 30 of the micro computer alternates between ON and OFF repeatedly at 4kHz and Q302 is turned ON/OFF accordingly. A 4kHz voltage is applied to the buzzer and the diaphragm of the buzzer vibrates to output 4kHz sound.

4. Initial setting (IC301)

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

5. Receive circuit

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

IC301

PROM)

R302

Micro computer

(AX-3U)

R305

C301

C302

D304

D303

R303

D302

D301

R306

12 4

R621

R712

C710

ZD701

R622

Receiver

Unit

R714

R713

12V

Micro computer

(AX-3U)

REMOCON I/P

Page 48

– 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 “Stick relay” and “Power relay”.

Micro computer

(AX-3U)

FORCE COOL 42

R606

Cool Normal

Page 49

– 53 –

INPUT SIGNAL

OPERATING SPECIFICATION

REFERENCE

OPERATION OPERATION MODE AIR DEFLECTOR

PRESENT CONDITION

KEY INPUT

INTERNAL FAN

(THERMO. ON)

INTERNAL FAN

OFF

(THERMO. OFF)

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

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.

Page 50

– 54 –

SERVICE CALL Q & A

While cooling, the compressor sometimes stops abruptly.

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

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.

Dehumidifying operation

The fan speed is always LO at a dehumidifying operation.

Cold air comes out during a dehumidifying operation.

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

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

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.

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

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.

Page 51

– 55 –

Air does not come out when starting a heating operation.

It is not a trouble. The fan is stopped to avoid cold wind.

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

Heating operation

Air does not come out sometimes while in a heating operation.

Defrosting is on. Wait for 5– 10 minutes unit the outdoor unit is defrosted.

The fan speed is set to “HI” or “MED” but the heating operation starts with a LO fan speed.

The heating operation starts 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.

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

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

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

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

A10

Q10

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

Q11

Auto fresh defrosting

“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.

A11

Page 52

– 56 –

How is the automatic operation mode determined?

Q12

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

Heating:

When room temperature is approx. 23°C or lower

A12

Automatic operation

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

Q13

The fan speed is automati-

cally determined.

A13

The room temperature cannot be controlled at an automatic operation.

Q14

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 ”.

A14

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

Heating :

When room temperature is approx. 21°C or lower

Page 53

– 57 –

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

Q15

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.

A15

Common, etc.

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

Q16

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

A16

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

Q17

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

A17

Set the temporary switch normal.

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

Q18

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.

A18

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

Q19

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

A19

Page 54

– 58 –

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.

Q20

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.

Q21

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

A21

The timer cannot be set.

Q22

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

A22

The current time disappears soon.

Q23

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

A23

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

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

A20

Page 55

– 59 –

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

Q24

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

A24

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

Q25

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

A25

Page 56

– 60 –

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 or heating

Stick relay abnormal

Power relay abnormal

YES

Check the continuity between contacts.

3) Power switch

4) Thermal fuse for therminal board

(96°C) Continuity across

➝ If there is no continuity,

also check the fan motor and capacitor.

(102°C) Continuity across

➝ If there is no continuity,

check the electric parts and replace if abnormal.

5) Thermal fuse for Terminal board

*2 Before checking the varistor, detach a terminal.

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 IC701 pin

power

relay and 0V?

Is the level LO (approx. 0.5V) between driver IC701 pin

stick

relay and 0V?

Is voltage normal between Blue and Red of the CN6? *3

YES Compressor does not turn at LO.

YES

Indoor fan motor or

Q904 abnormal

Replace Stick relay

Replace Power relay

YES

Is the level LO (approx. 0.5V) between driver IC 701 pin

(Reversing valve relay) and 0V at heating operation?

Reversing valve

relay abnormal

Replace Reversing

valve relay

Page 57

– 61 –

Is voltage normal (approx. 280 ~ 300V) at out put side of the DB201?

Check the circuit board of

control board

YES

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

Fan Speed

RAS-07GH4

RAC-07GH4

Replace faulty part

*4 Wait for 3 minutes before forced

re-operation by the service switch.

CN6 BLUE-RED (V)

Cool Heat

20.8

15.6

12.5

11.0

20.8

17.9

15.0

MED

SLEEP MODE

RAS-09GH4 RAC-09GH4

RAS-14GH4 RAC-14GH4

Cool Heat

21.3

18.0

13.7

11.9

23.0

19.7

16.6

Cool Heat

27.0

20.9

15.8

13.0

28.4

23.6

19.3

Page 58

– 62 –

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

4-way valve not working

Inside temperature is low in heating operation time or inside temperature is high in cooling operation time.

(1) 4-way valve is not working.

(2) Heat-exchanger thermistor is

in disconnection.

(Only heating time)

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.

( – – 0.5 second on, 0.5 second off.)

– – – – 15 times

– – – 14 times

– – – 13 times

––––––– 2 times

–––––––– 1 time

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

sec.

Page 59

– 63 –

PARTS LIST AND DIAGRAM

INDOOR UNIT MODEL :

RAS-07GH4 / RAS-09GH4 / RAS-14GH4

23 25

27 24

Page 60

– 64 –

MODEL RAS-07GH4

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 BEARING 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-07GH4 003 1 P.W.B (MAIN)

23 PMRAS-07GH4 004 1 P.W.B (POWER SW SUPPLY)

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

26 HWRAS-25YH4 939 1 LOW COVER

27 HWRAS-25YH4 917 1 TERMINAL BOARD

PART N0.

RAS-07GH4

NO.

Q’TY / UNIT

PARTS NAME

Page 61

– 65 –

MODEL RAS-09GH4

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 BEARING 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-09GH4 001 1 P.W.B (MAIN)

23 PMRAS-07GH4 004 1 P.W.B (POWER SW SUPPLY)

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

26 HWRAS-25YH4 939 1 LOW COVER

27 HWRAS-25YH4 917 1 TERMINAL BOARD

PART N0.

RAS-09GH4

NO.

Q’TY / UNIT

PARTS NAME

Page 62

– 66 –

MODEL RAS-14GH4

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 BEARING 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-14GH4 001 1 P.W.B (MAIN)

23 PMRAS-07GH4 004 1 P.W.B (POWER SW SUPPLY)

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

26 HWRAS-25YH4 939 1 LOW COVER

27 HWRAS-25YH4 917 1 TERMINAL BOARD (2P)

PART N0.

RAS-14GH4

NO.

Q’TY / UNIT

PARTS NAME

Page 63

– 67 –

PARTS LIST AND DIAGRAM

INDOOR UNIT MODEL :

RAC-07GH4 / RAC-09GH4

Page 64

– 68 –

MODEL RAC-07GH4

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-25CNH2 902 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-51CHA1 903 1 TERMINAL BOARD (4P)

50 PMRAC-07GH4 906 1 COMPRESSOR CAPACITOR

51 PMRAC-07GH4 903 1 REVERSING VALVE

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

53 PMRAC-07GH4 909 1 OVERLOAD PROTECTOR

PART N0.

RAC-07GH4

NO.

Q’TY / UNIT

PARTS NAME

Page 65

– 69 –

MODEL RAC-09GH4

1 PMRAC-09GH4 904 1 CHECKVALVE

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-25CNH2 902 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 PMRAS-51CHA1 903 2 TERMINAL BOARD (4P)

50 PMRAC-09GH4 903 1 COMPRESSOR CAPACITOR

51 PMRAC-07GH4 903 1 REVERSING VALVE

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

53 PMRAC-09GH4 906 1 OVERLOAD PROTECTOR

PART N0.

RAC-09GH4

NO.

Q’TY / UNIT

PARTS NAME

Page 66

– 70 –

PARTS LIST AND DIAGRAM

OUTDOOR UNIT MODEL :

RAC-14GH4

Page 67

– 71 –

MODEL RAC-14GH4

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-51CHA1 903 1 TERMINAL BOARD (4P)

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)

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 CHECKVALVE

53 PMRAC-14GH4 906 1 OVERLOAD PROTECTOR

PART N0.

RAC-14GH4

NO.

Q’TY / UNIT

PARTS NAME

Page 68

HITACHI

PM NO. 0000E

Printed in Malaysia

RAS-07GH4 / RAC-07GH4 RAS-09GH4 / RAC-09GH4 RAS-14GH4 / RAC-14GH4