Hitachi 0162E Service Manual

SERVICE MANUAL

TECHNICAL INFORMATION

FOR SERVICE PERSONNEL ONLY

RAS-18CH1 RAS-24CH2

RAC-18CH1 RAC-24CH2

NO. 0162E

RAS-18CH1/RAC-18CH1 RAS-24CH2/RAC-24CH2

REFER TO THE FOUNDATION MANUAL

CONTENTS

SPECIFICATIONS ---------------------------------------------------- 5 HOW TO USE --------------------------------------------------------10 CONSTRUCTION AND DIMENSIONAL DIAGRAM -----31 MAIN PARTS COMPONENT ------------------------------------33 WIRING DIAGRAM --------------------------------------------------35 CIRCUIT DIAGRAM-------------------------------------------------37 PRINTED WIRING BOARD LOCATION DIAGRAM-----39 BLOCK DIAGRAM ---------------------------------------------------41 BASIC MODE ---------------------------------------------------------43 REFRIGERATING CYCLE DIAGRAM ------------------------49 DESCRIPTION OF MAIN CIRCUIT OPERATION -------51 AUTO SWING FUNCTION---------------------------------------55 SERVICE CALL Q & A -------------------------------------------- 56 TROUBLE SHOOTING --------------------------------------------62 PARTS LIST AND DIAGRAM -----------------------------------65

SPECIFICATIONS

TYPE

MODEL POWER SOURCE

TOTAL INPUT

COOLING

HEATING

DIMENSIONS (mm)

NET WEIGHT

TOTAL AMPERES

CAPACITY

TOTAL INPUT TOTAL AMPERES

CAPACITY

(W)

(A)

(kW)

(B.T.U./h)

(W)

(A)

(kW)

(B.T.U./h)

H D

(kg)

INDOOR UNIT OUTDOOR UNITINDOOR UNITOUTDOOR UNIT

RAS-18CH1 RAC-18CH1

1 Ø, 50 Hz, 220 - 230V

1680 - 1730

7.8 - 7.7

5.10

17,410

1680 - 1730

7.8 - 7.7

5.7

19,450

1030

295 183

(WALL TYPE)

RAS-24CH2 RAC-24CH2

850 650 298

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

1 Ø, 50 Hz, 220 - 230V

2180 - 2200

10.4 - 10.1

6.0

20,490

2350 - 2380

11.1 - 10.8

7.0

23,890

1030

295 183

After installation

850 650 298

ROOM AIR CONDITIONER

DECEMBER 2002

Refrigeration & Air-Conditioning Division

INDOOR UNIT + OUTDOOR UNIT

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.

First, I must disconnect the power cord plug

from the power outlet.

3. After completion of repairs, the initial state should be restored.

4. Lead wires should be connected and laid as in the initial state.

5. Modification of the unit by user himself should absolutely be prohibited.

6. Tools and measuring instruments for use in repairs or inspection should be accurately calibrated in advance.

7. In installing the unit having been repaired, be careful to prevent the occurence of any accident such as electrical shock, leak of current, or bodily injury due to the drop of any part.

8. To check the insulation of the unit, measure the insulation resistance between the power cord plug and grounding terminal of the unit. The insulation resistance should be 1M 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.

or more as measured by a 500V

DANGER

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.

– 1 –

WORKING STANDARDS FOR PREVENTING BREAKAGE OF SEMICONDUCTORS

1. Scope The standards provide for items to be generally observed in carrying and handling semiconductors in relative manufacturers during maintenance and handling thereof. (They apply the same to handling of abnormal goods such as rejected goods being returned).

2. Object parts (1) Micro computer

(2) Integrated circuits (IC) (3) Field-effect transistors (FET) (4) P.C. boards or the like on which the parts mentioned in (1) and (2) of this paragraph are equipped.

3. Items to be observed in handling (1) Use a conductive container for carrying and storing of parts. (Even rejected goods should be handled in

the same way).

A conductive polyvinyl bag

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.

Conductive sponge

Body earth (Elimik conductive band)

Fig. 2. Body Earth

Clip for connection with a grounding wire

– 2 –

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

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

Working table

Bare copper wire (for body earth)

Staple

Fig. 3. Grounding of the working table

Soldering iron

Resistor of 1 M

Earth wire

Grounding wire

(1/2W)

Screw stop at the screwed part using a rag plate

Fig. 4. Grounding a soldering iron

Use a high insulation mode (100V, 10M

(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.

or higher) when ordinary iron is to be used.

– 3 –

CAUTION

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. The room air conditioner does not start automatically after recovery of the electric power failure for preventing fuse blowing. Re-press START/STOP button after 3 minutes from when unit stopped.

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.

– 4 –

SPECIFICATIONS

MODEL

FAN MOTOR

FAN MOTOR CAPACITOR

FAN MOTOR PROTECTOR

COMPRESSOR

COMPRESSOR MOTOR CAPACITOR

OVERLOAD PROTECTOR

OVERHEAT PROTECTOR

FUSE (MICRO COMPUTER CIRCUIT)

POWER RELAY

POWER SWITCH

RAS-18CH1

40 W

–

3.15A

G4A

YES

RAC-18CH1

40 W

2.5 F,450V

YES (INTERNAL)

SHX33SC4-U

50 F, 440VAC

YES (INTERNAL)

TEMPORARY SWITCH

SERVICE SWITCH

TRANSFORMER

VARISTOR

NOISE SUPPRESSOR

THERMOSTAT

REMOTE CONTROL SWITCH (LIQUID CRYSTAL)

FUSE CAPACITY

UNIT

REFRIGERANT CHARGING VOLUME (Refrigerant R22)

PIPES (MAX. 15m)

PIPES (MIN. 5m)

YES

450NR

YES(IC)

YES

20 A TIME DELAY FUSE

---------- ❈ 1400g

ADDITIONAL REFRIGERANT R22 AT 25g PER EVERY METER IF PIPE LENGTH MORE THAN 8m

YES

YES(IC)

– 5 –

SPECIFICATIONS

MODEL

FAN MOTOR

FAN MOTOR CAPACITOR

FAN MOTOR PROTECTOR

COMPRESSOR

COMPRESSOR MOTOR CAPACITOR

OVERLOAD PROTECTOR

OVERHEAT PROTECTOR

FUSE (MICRO COMPUTER CIRCUIT)

POWER RELAY

POWER SWITCH

RAS-24CH2

40 W

–

3.15A

G4A

YES

RAC-24CH2

40 W

2.5 F,450V

YES (INTERNAL)

LH938SA1

75 F, 400VAC

YES (INTERNAL)

TEMPORARY SWITCH

SERVICE SWITCH

TRANSFORMER

VARISTOR

NOISE SUPPRESSOR

THERMOSTAT

REMOTE CONTROL SWITCH (LIQUID CRYSTAL)

FUSE CAPACITY

REFRIGERANT CHARGING VOLUME (Refrigerant R22)

PIPES (MAX. 15m)

PIPES (MIN. 5m)

YES

450NR

YES(IC)

YES

30 A TIME DELAY FUSE

---------- ❈ 1720gUNIT

ADDITIONAL REFRIGERANT R22 AT 30g PER EVERY METER IF PIPE LENGTH MORE THAN 8m

YES(IC)

– 6 –

Figure showing the installation of Indoor anf Outdoor unit

CAUTION

The installation height of indoor unit must be 2.5m or more in a non public area

above 50mm

above 100mm

above

0.45m

2,500mm or more

above 300mm

must not bend

above 100mm

above 700mm

above 200mm

above 50mm when installed on the

(

ceiling of balcony

Maximum pipe length 15m

Minimum pipe length 5m

)

Plug

above 100mm

give clearance as wide as possible

above 200mm

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

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

The connection of insulated drain hose.

inner diameter ø 16mm

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

– 7 –

SAFETY PRECAUTION

●

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

●

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

●

The sign indicate the following meanings.

Make sure to connect earth line.

Indicates the instructions that must be followed.

●

Please keep this manual after reading.

PRECAUTIONS DURING INSTALLATION

●

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

●

WARNING

CAUTION

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

●

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

●

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

●

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

●

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

The sign in the figure indicates prohibition.

A R N

N G

A R N

N G

PRECAUTIONS DURING SHIFTING OR MAINTENANCE

●

Should abnormal situation arises (like burning smell), please stop operating the unit

and turn off the circuit breaker. Contact your agent. Fault, short circuit or fire may occur if you continue to operate the unit under abnormal situation.

●

Please contact your agent for maintenance. Improper self maintenance may cause electric shock and fire.

●

Please contact your agent if you need to remove and reinstall the unit. Electric shock or fire may occur if you remove and reinstall the unit yourself improperly.

PRECAUTIONS DURING OPERATION

●

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

●

Do not put objects like thin rods into the panel of blower and suction side because the high-speed fan inside may cause danger.

●

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

●

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

– 8 –

PRECAUTIONS DURING OPERATION

●

The product shall be operated under the manufacturer specification and not for any other intended use.

●

Do not attempt to operate the unit with wet hands, this could cause fatal accident.

●

When operating the unit with burning equipments, regularly ventilate the room to avoid oxygen insufficiency.

●

Do not direct the cool air coming out from the air-conditioner panel to face household heating apparatus as this may affect the working of apparatus such as the electric kettle, oven etc.

●

Please ensure that outdoor mounting frame is always stable, firm and without defect. If not, the outdoor unit may collapse and cause danger.

●

Do not splash or direct water to the body of the unit when cleaning it as this may cause short circuit.

●

Do not use any aerosol or hair sprays near the indoor unit. This chemical can

C A

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.

U T

●

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

O N

●

Turn off the circuit breaker if the unit is not to be operated for a long period.

●

Do not climb on the outdoor unit or put objects on it.

●

Do not put water container (like vase) on the indoor unit to avoid water dripping into the unit. Dripping water will damage the insulator inside the unit and causes short-circuit.

●

Do not place plants directly under the air flow as it is bad for the plants.

●

When operating the unit with the door and windows opened, (the room humidity is always above 80%) and with the air deflector facing down or moving automatically for a long period of time, water will condense on the air deflector and drips down occasionally. This will wet your furniture. Therefore, do not operate under such condition for a long time.

●

If the amount of heat in the room is above the cooling or heating capability of the unit (for example: more people entering the room, using heating equipments and etc.), the preset room temperature cannot be achieved.

– 9 –

NAMES AND FUNCTIONS OF EACH PART

INDOOR UNIT

Air filter

To prevent dust from coming into the indoor unit. (Refer page 27)

Front panel

Indoor unit indicators

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

Horizontal deflector (Air Outlet)

(Refer page 22)

●●

●

●●

Vertical deflector

OUTDOOR UNIT

MODEL NAME AND DIMENSIONS

Remote controller

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

Drain pipe

Condensed water drain to outside.

Connecting cord and insulation pipe for piping

Air inlet (Back and Left side)

Air outlet

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.

MODEL

RAS-18CH1 / RAS-24CH2

RAC-18CH1 / RAC-24CH2

WIDTH (mm)

1030

850

– 10 –

HEIGHT (mm)

295 650

DEPTH (mm)

183 298

INDOOR UNIT INDICA T ORS

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 an hour when frost forms on the heat exchanger of the outdoor unit, for 5–10 minutes each time.

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.

TIMER LAMP

This lamp lights when the timer is working.

OPERA TION INDICA T OR

● This figure shows the opening condition of

front panel. Refer to page 26 in relation to how to open or close the front panel.

AUTO RESTART SWITCH

● In the event of power failure, the air conditioner will restart automatically in the previously selected mode once

the power is restored.

● In the event of power failure during TIMER operation, the timer will be reset and the unit will begin or stop

operating under a new timer setting.

– 11 –

NAMES AND FUNCTIONS OF REMOTE CONTROL UNIT

REMOTE CONTROLLER

This controls the operation of the indoor unit. The range of control is about 7 meters. If indoor lighting is controlled electronically, the range of control may be shorter. This unit can be fixed on a wall using the fixture provided. Before fixing it, make sure the indoor unit can be controlled from the remote controller.

● Signal emitting window/transmission sign

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

● Display

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

● START/STOP button

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

● SLEEP button

Use this button to set the sleep timer.

● TEMPERATURE 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.

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

● 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.

– 12 –

AUTOMATIC OPERA TION

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

Press the FUNCTION selector so that the display indicates the (AUTO) mode of operation.

START

STOP

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

● 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.

to press the (START/STOP) button next time.

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

● The preset temperature and the actual room temperature may vary

somewhat depending on conditions.

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

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

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

■ Condition of Automatic Operation

Initial room temperature (approx.)

Over 27°C COOL

23~27°C

Under 23°C HEAT

➡ ➡

➡

DEHUMIDIFY

Temperature settingFunction

27°C

Slightly lower than the room temperature

23°C

– 13 –

FAN SPEED

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

LOW

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

HEA TING OPERATION

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

When it is too warm (over 21°C), the heating function may not work in order to protect the device.

Press the FUNCTION selector so that the display indicates

(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 temperature setting and the actual room temperature may vary somewhat depending on conditions.

START

STOP

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

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

have to press the (START/STOP) button next time.

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.

– 14 –

DEHUMIDIFYING OPERA TION

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.

START

STOP

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

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

Press the FUNCTION selector so that the display indicates (DEHUMIDIFY). The FAN SPEED is set at LOW automatically. The FAN SPEED button does not work.

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

The range of 20-26 room temperature for dehumidifying.

only have to press the (START/STOP) button next time.

°C is recommended as the

■ 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.

– 15 –

COOLING OPERA TION

Use the device for cooling when the outdoor temperature is 22-42°C. If indoor humidity is very high (80%), some dew may form on the air outlet grille of the indoor unit.

Press the FUNCTION selector so that the display indicates

(COOL).

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

(AUTO): The FAN SPEED is HI at first and varies to

MED automatically when the preset temperature

(HI) : Economical as the room will become cool

(MED) : Quiet. (LOW) : More quiet.

Press the (START/STOP) button. Cooling operation starts

START

STOP

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.

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

has been reached.

quickly.

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.

(FAN SPEED) button

The temperature setting and the actual room temperature may vary some how depending on conditions.

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

only have to press the (START/STOP) button next time.

– 16 –

F AN 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).

FAN SPEED (AUTO)

operation:

For the heating operation

START

STOP

.....

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

● 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.

Press the (FAN SPEED) button.*

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

* Note • In the fan operation mode, only display of FAN SPEED

setting will change by pressing FAN SPEED button; the actual fan speed cannot be changed directly from HI to LOW mode.

For the cooling operation

● When the difference of room temperature and setting temperature is

large, fan starts to run at HI speed.

● After room temperature reaches the preset temperature, the cooling

operation, which changes the fan speed and room temperature to obtain optimum conditions for natural healthful cooling will be performed.

– 17 –

HOW TO SET THE TIMER

Time, Day, Month

TIME, DAY, MONTH

After you change the batteries;

(current time, day, month)

OFF TIMER

ON TIMER

OFF-Timer

RESERVE CANCEL

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

ON-Timer

● The device will turn on at

the designated times.

Start

M D

STOP

Stop

Start

Set the current month and

day with the TIMER control button.

M D

Press the (OFF-TIMER)

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

Press the (ON-TIMER)

button the (ON) mark blinks on the display.

ON/OFF-Timer

Start Stop

● The device will turn on (off) and off (on) at the designated times.

● The switching occurs first at the preset time that comes earlier.

● The arrow mark appearing on the display indicates the sequence of switching operations.

Press the (ON-OFF)

button so that the (OFF) mark blinks.

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.

How to Cancel Reservation

Point the signal window of the remote controller toward the indoor unit, and press the (CANCEL) button. The (RESERVED) sign goes out with a beep and the (TIMER) lamp turns off on the indoor unit.

NOTE

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

– 18 –

Press the

(TIME) button.

AM PM PM

Set the turn-off time with

the TIMER control button.

TIMER control button.

Set the current time with the

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

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.

Press the (TIME) button again.

The time indication starts lighting instead of flashing.

● The time indication will disappear

● To check the current time setting,

automatically in 10 second.

press the (TIME) button twice. The setting of the current time is

now complete.

Set the turn-on time with

the TIMER control button.

Set the turn-on time with

the TIMER control button.

The setting of turn-off time is now complete.

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.

Example:

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.

The device will automatically turn on earlier so that the preset temperature can be reached at 7:00 a.m. The setting of the turn-on time is now complete.

Example: The device will turn off at 10:30 p.m. and then automatically turn on earlier so that the preset temperature can be reached at 7:00 a.m. The settings of the turn-on/off times are now complete.

Example: The device will turn off at 11:00p.m.

● 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.

– 19 –

HOW TO SET THE SLEEP TIMER

Set the current time first if it is not set before (see the pages for setting the current time). Press the (SLEEP) button, and the display changes as shown below.

Mode

▲

Sleep timer

1 hour 2 hours 3 hours 7 hours

▲

Indication

▲

Sleep timer off

▲

Sleep Timer: The device will continue working for the designated number of hours and then turn off.

SLEEP

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

Sleep

timer

Set the ON-timer.

Start

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

time is 2:38 a.m.

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

For heating: In this case, the device will turn off

in 2 hours (at 1:38 a.m.) and turn on early so that the preset temperature will be almost reached at 6:00 next morning.

How to Cancel Reservation

Point the signal window of the remote controller toward the indoor unit, and press the (CANCEL) button. The (RESERVED) sign goes out with a beep and the (TIMER) lamp turns off on the indoor unit.

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