Hitachi RAC-70YH7, RAS-70YH7 Service Manual

NO. 0465E

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

ROOM AIR CONDITIONER

INDOOR UNIT + OUTDOOR UNIT

JANUARY 2010

Refrigeration & Air-Conditioning Division

SERVICE MANUAL

PM

REFER TO THE FOUNDATION MANUAL

TECHNICAL INFORMATION

FOR SERVICE PERSONNEL ONLY

SPECIFICATIONS

RAS-70YH7

CONTENTS

CAUTION ----------------------------------------------------------------- 4

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

INSTALLATION --------------------------------------------------------- 6

HOW TO USE ---------------------------------------------------------- 7

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

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

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

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

PRINTED WIRING BOARD LOCATION DIAGRAM ------- 41

BLOCK DIAGRAM --------------------------------------------------- 44

BASIC MODE --------------------------------------------------------- 45

REFRIGERATING CYCLE DIAGRAM ------------------------- 59

DESCRIPTION OF MAIN CIRCUIT OPERATION --------- 61

SERVICE CALL Q & A -------------------------------------------- 74

TROUBLE SHOOTING --------------------------------------------- 78

PARTS LIST AND DIAGRAM ------------------------------------ 98

RAS-70YH7/RAC-70YH7

After installation

RAC-70YH7

(W)

(A)

(kW)

(B.T.U./h)

(W)

(A)

(kW)

(B.T.U./h)

W

H

D

(kg)

(WALL TYPE)

TYPE

MODEL

POWER SOURCE

TOTAL INPUT

TOTAL AMPERES

CAPACITY

TOTAL INPUT

TOTAL AMPERES

CAPACITY

DIMENSIONS (mm)

NET WEIGHT

COOLING

HEATING

OUTDOOR UNIT

RAC-70YH7

INDOOR UNIT

RAS-70YH7

1150

333

245

15

1 Ø, 50/60 Hz, 220-240V

2,170 (200 – 2,820)

9.95

7.00 (1.50 – 8.00)

23,900 (5,120 – 27,315)

2,200 (200 – 2,970)

10.10

8.00 (1.50 – 9.20)

27,300 (5.119 – 31,396)

850

800

298

55

HITACHI

– 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 1M 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.

First, I must disconnect the power cord plug

from the power outlet.

DANGER

– 2 –

WORKING STANDARDS FOR PREVENTING BREAKAGE OF SEMICONDUCTORS

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

2. Object parts

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

3. Items to be observed in handling

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

the same way).

Fig. 1. Conductive Container

(2) When any part is handled uncovered (in counting, packing and the like), the handling person must always

use himself as a body earth. (Make yourself a body earth by passing one M ohm earth resistance through a ring or bracelet).

(3) Be careful not to touch the parts with your clothing when you hold a part even if a body earth is being

taken.

(4) Be sure to place a part on a metal plate with grounding.

(5) Be careful not to fail to turn off power when you repair the printed circuit board. At the same time, try

to repair the printed circuit board on a grounded metal plate.

1M

Fig. 2. Body Earth

Body earth (Elimik conductive band)

Clip for connection with a grounding wire

IC

A conductive polyvinyl bag

IC

Conductive sponge

– 3 –

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

Bare copper wire (for body earth)

Working table

Resistor of 1 M (1/2W)

Earth wire

Fig. 3. Grounding of the working table

Screw stop at the screwed part using a rag plate

Soldering iron

Grounding wire

Fig. 4. Grounding a soldering iron

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

(7) In checking circuits for maintenance, inspection or some others, be careful not to have the test probes of the

measuring instrument shortcircuit a load circuit or the like.

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

Staple

– 4 –

1. In quiet or stop operation, slight flowing noise of refrigerant in the refrigerating cycle is heard occasionally, but this noise is not abnormal for the operation.

2. When it thunders near by, it is 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 (14°F).

6. This room air conditioner (the reverse cycle) should not be used when the outside temperature is below –15°C (5°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

– 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

TEMPORARY SWITCH

TEST/SERVICE SWITCH

TRANSFORMER

VARISTOR

NOISE SUPPRESSOR

THERMOSTAT

REMOTE CONTROL SWITCH (LIQUID CRYSTAL)

FUSE CAPACITY

RAS-70YH7

30 W

NO

–

NO

3.15A

G4A

NO

YES

NO

416NR

NO

YES(IC)

YES

NO

JU1015D9

NO

YES

NO

G4A

NO

YES

NO

450NR

NO

YES(IC)

NO

30 A TIME DELAY FUSE

---------- ❈ 1850gUNIT

REFRIGERANT CHARGING VOLUME (Refrigerant R410A)

CHARGELESS

PIPES (MAX. 30m)

PIPES (MIN. 3m)

RAC-70YH7

47 W

– 6 –

a

b

o

u

t

0

.

5

m

2

1

above 300 mm

Maximum pipe length 30m

Minimum pipe length 3m

must not bend

above 2300 mm

above 200 mm

above 50mm

above 100mm

Be sure to completely seal any gap with putty.

700

Figure showing the installation of Indoor and Outdoor unit

● The difference in height

between the indoor and outdoor unit should be kept max 20m.

● 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

– 7 –

РУССКИЙ

INDOOR UNIT

NAMES AND FUNCTIONS OF EACH PART

AIR FILTER

To prevent dust from coming into the indoor unit. (Refer Instruction manual)

FRONT PANEL (AIR INLET).

INDOOR UNIT INDICATORS

Light indicator showing the operating condition. (Refer page 8)

HORIZONTAL DEFLECTOR

●

VERTICAL

DEFLECTOR (AIR OUTLET)

(Refer Instruction manual)

REMOTE CONTROLLER

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

●

WIDTH (mm)

1150

850

MODEL

RAS-70YH7

RAC-70YH7

HEIGHT (mm)

333

800

DEPTH (mm)

245

298

MODEL NAME AND DIMENSIONS

OUTDOOR UNIT

DRAIN PIPE

Condensed water drain to outside.

CONNECTING CORD

AIR INLET (BACK, LEFT SIDE)

AIR OUTLET

● Air cleansing filters are not washable and can be use in 1 year time. Type number for this air

cleansing filter is <SPX-CFH12>. Please use this number for ordering when you want to renew it.

● Air cleansing 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 1 year depending on application requirements.

NOTE

– 8 –

Press

Temporary Switch

emporary Switch

Non-conductor Stick

INDOOR UNIT INDICATORS

TEMPORARY SWITCH

OPERATION INDICATOR

TIMER LAMP

This lamp lights when the timer is working.

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 200 hours, the FILTER lamp lights to indicate that it is time to clean the filter. The lamp goes out when the “ (AUTO SWING)” button is pressed while the device is on “STANDBY MODE”.

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.

– 9 –

РУССКИЙ

MEMO

.....................................................................................................................................................................................

Minimum Maximum Minimum Maximum

Indoor

Dry bulb °C2132 2027

Wet bulb °C1523 1219

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

–10°C (14°F). The recommended maximum and minimum operating temperatures of the hot and cold sides should be as below:

Cooling Heating

– 10 –

!

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.

●

Be sure to use the specified piping set for R410A. Otherwise, this may result in broken copper pipes or faults.

●

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

●

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

●

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

CAUTION

!

PRECAUTIONS DURING OPERATION

●

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

W

A R N

I N G

!

●

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.

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.

●

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

W

A R N

I N G

!

– 11 –

PRECAUTIONS DURING OPERATION

●

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

●

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

●

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

●

Do not use any aerosol or hair sprays near the indoor unit. This chemical can adhere on heat exchanger fin and blocked the evaporation water flow to drain pan. The water will drop on tangential fan and cause water splashing out from indoor unit.

●

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

●

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

●

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

●

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

●

This appliance is not intended for use by young children or infirm persons unless they have been adequately supervised by a responsible person to ensure that they can use the appliance safely.

●

Young children should be supervised to ensure that they do not play with the appliance.

●

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

●

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

●

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

C A U T

I

O

N

!

●

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

●

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

●

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

– 12 –

SILENT LOW MED HI

AUTO

HEAT

DEHUMIDIFY

COOL

FAN

FAN SPEED

SLEEPING

STOP (CANCEL)

START (RESERVE)

START/STOP

TIME

TIMER SET

TIMER SELECT

PARALLEL SWING

SYMMETRY SWING

OR

ON TIMER OFF TIMER

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) to (SILENT) (This button allows selecting the optimal or preferred fan speed for each operation mode).

● PARALLEL SWING button

Controls the angle of the vertical air deflectors to parallel.

● SYMMETRY SWING button

Controls the angle of the vertical air deflectors to symmetry.

● 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.

– 13 –

AUTOMATIC OPERATION

The device will automatically determine the mode of operation, HEAT, COOL or DEHUMIDIFY depending on the current room temperature. The selected mode of operation will change when the room temperature varies. However the mode of operation will not change when indoor unit connected to multi type outdoor unit.

VARIOUS FUNCTIONS

■ Auto Restart Control

● If there is a power failure, operation will be automatically restarted when the power is resumed with previous operation mode

and airflow direction. (As the operation is not stopped by remote controller.)

● If you intend not to continue the operation when the power is resumed, switch off the power supply.

When you switch on the circuit breaker, the operation will be automatically restarted with previous operation mode and airflow direction. Note: 1. If you do not require Auto Restart Control, please consult your sales agent or OFF by remote control.

2. Auto Restart Control is not available when Timer or Sleep Timer mode is set.

■ 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 current room temperature. However the mode of operation will not change when indoor unit connected to multi type outdoor unit.

● If the mode automatically selected by the unit is not satisfactory, manually change the mode setting (heat, dehumidify, cool or fan).

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.

1

START

STOP

°C

Press the (FAN SPEED) button, AUTO, LOW and SILENT is available.

– 14 –

HEATING OPERATION

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

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

● In order to keep reliability of the device, please use this device above -15°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 changes automatically

according to the temperature of the air which blows out.

(HI) : Economical as the room will become warm

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

(MED) : Fan speed slow.

(LOW) : Fan speed slower.

(SILENT) : Fan speed ultra slower.

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.

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.

1

2

3

START

STOP

■ Defrosting

Defrosting will be performed about once an hour when frost forms on the heat exchange of the outdoor unit, for 5~10 minutes each time. During defrosting operation, the operation lamp blinks in cycle of 3 seconds on and 0.5 second off. The maximum time for defrosting is 20 minutes. However, if it is connected to multi type outdoor unit, the maximum time for defrosting is 15 minutes. (If the piping length used is longer than usual, frost will likely to form.)

– 15 –

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.

● The preset room temperature may not be reached depending on the number of people present in the

room or other room conditions.

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

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

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

2

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

only have to press the

(START/STOP) button next time.

START

STOP

Press the FUNCTION selector so that the display indicates

(DEHUMIDIFY).

The FAN SPEED is set at LOW or SILENT.

1

– 16 –

COOLING OPERATION

Use the device for cooling when the outdoor temperature is –10°C~ 43°C. If in doors humidity is very high (80%), some dew may form on the air outlet grille of the indoor unit.

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

Set the desired FAN SPEED with the

(FAN SPEED) button

(the display indicates the setting).

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

to MED or LOW automatically when the preset temperature has been reached.

(HI) : Economical as the room will become cool

quickly.

(MED) : Fan speed slow.

(LOW) : Fan speed slower.

(SILENT) : Fan speed ultra slower.

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

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.

1

2

START

STOP

3

– 17 –

FAN SPEED (AUTO)

.....

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

For the heating 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 heating

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

● 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.

(HI) : The strongest air blow.

(MED) : Fan speed slow.

(LOW) : Fan speed slower.

(SILENT) : Fan speed ultra slower.

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

1 2

START

STOP

– 18 –

HOW TO SET THE TIMER

ON/OFF-Timer

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

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

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

1

Press the (ON-OFF)

button so that the (OFF) mark blinks.

OFF-Timer

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

After you change the batteries;

How to Cancel Reservation

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

1

Set the (TIME) button.

1

Press the (OFF-TIMER)

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

1

Press the (ON-TIMER)

button the (ON) mark blinks on the display.

2

Set the turn-off time

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

3

Press the (ON-

TIMER) button so that the

(OFF) mark lights and

the

(ON) mark blinks.

NOTE

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

ON-Timer

Time

● The device will turn on

at the designated times.

TIME

OFF TIMER

ON TIMER

RESERVE

CANCEL

AM PM

STOP

Start

AM

Start

Stop

AM

Start Stop

PM

AM

PM

– 19 –

3

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

press the (RESERVE) button. The

(OFF) mark starts lighting instead of flashing and the sign (RESERVED)

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

● The time indication will disappear

automatically in 10 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.

2

Press the

(TIME) button.

3

Set the current time with the

TIMER control button.

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

2

Set the turn-off time with the

TIMER control button.

The setting of turn-off time is now complete.

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

Example: The device will turn on at 7:00 a.m. The setting of the turn-on time is now complete.

4

Set the turn-on time with the

TIMER control button.

5

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

press the (RESERVE) button.

The

(ON) mark starts lighting instead of flashing and the (RESERVED)

sign lights. A beep occurs and the

(TIMER) lamp lights on the indoor unit.

3

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

press the (RESERVE) button.

The

(ON) mark starts lighting instead of flashing and the (RESERVED)

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

2

Set the turn-on time with the

TIMER control button.

Example: The device will turn off at 10:30 p.m. and it will be turned on at 7:00 a.m. The settings of the turn-on/off times are now complete.

4

Press the (TIME) button again.

The time indication starts lighting instead of flashing.

AM

PM

AM

PM

AM

PM

AM

PM

AM

PMPMPM

PM

PMPMPM

PM

AMAMAM

AM

– 20 –

HOW TO SET THE SLEEP TIMER

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

1

Set the ON-timer.

Mode

Sleep timer

Indication

1 hour 2 hours 3 hours 7 hours

Sleep timer off

44 44

1

Sleep Timer: The device will continue working for the designated number of hours and then turn off. Point the signal window of the remote controller toward the indoor unit, and press the SLEEP button. The timer information will be displayed on the remote controller. The TIMER lamp lights with a beep from the indoor unit. When the sleep timer has been set, the display indicates the turn-off time.

Example: If you set 3 hours sleep time at 11:38 p.m., the turn-off time is 2:38 a.m.

2

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

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

How to Cancel Reservation

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

For heating:

In this case, the device will turn off in 2 hours (at 1:38 a.m.) and it will be turned on 6:00 next morning.

H

AM

H

AM

Sleep

timer

Start

SLEEP

– 21 –

HOW TO EXCHANGE THE BATTERIES IN THE REMOTE CONTROLLER

1

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

=

2

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

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

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

CAUTION

!

Push and pull to the direction of arrow

CIRCUIT BREAKER

When you do not use the room air conditioner, set the circuit breaker to “OFF”.

TEMPORARY SWITCH

If the remote controller does not work due to battery failure, press this switch to start and stop operation.

● This temporary operation will be at the setting made most recently. (The unit will immediately go into

automatic operation once power is switched on.)

– 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

– 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.

TV

– 24 –

ATTACHING THE AIR CLEANSING FILTERS

1

Open the front panel.

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

with both hands.

2

Remove the filter.

● Push upward to release the claws and pull out the

filter.

3

Attaching the air cleansing filters to the filter.

● Attach the air cleansing filters to the frame by gently

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

4

Attach the filters.

● Attach the filters by ensuring that the surface written

“FRONT” is facing front.

● After attaching the filters, push the front panel at

three arrow portion as shown in figure and close it.

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

CAUTION

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

NOTE

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

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

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

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

Claws

(4 places)

!

– 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

1

Open the front panel and remove the filter

● Gently lift and remove the air cleansing filter

from the air filter frame.

2

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

3

● Re-insert the air cleansing 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 filter as some detergent may deteriorate the filter electrostatic

performance.

PROCEDURE

!

– 26 –

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.

Arm

Projection

Hole

Flange

– 27 –

1

2

3

REGULAR INSPECTION

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

Is the earth line disconnected or broken?

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

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

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

!

CAUTION

Confirm

3. MAINTENANCE AT BEGINNING OF LONG OFF PERIOD

● Running the unit setting the operation mode to

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

● Switch off the power plug.

Air

Blow

– 28 –

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”?

● Is the setting of operation mode different from other indoor

units?

● Is the air filter blocked with dust?

● 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?

● Are the air inlets or air outlets of indoor and outdoor units

blocked?

● Is the fan speed “LOW” or “SILENT”?

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

If the remote controller is not transmitting a signal.

● Do the batteries need replacement?

● Is the polarity of the inserted batteries correct?

Remote controller display is dim or blank.)

NOTE:

● If the supply cord is damaged, it must be replaced by the special cord obtainable at authorized

service parts centers.

● 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.

– 29 –

CONSTRUCTION AND DIMENSIONAL DIAGRAM

Note:

1. Service space (free space needed for servicing) is 200mm on the right, 100mm on the left and 50mm on top.

2. The wide and narrow pipes must be thermally insulated.

3. Piping length is within 30m

4. Height different of the piping between the indoor unit and the outdoor unit should be within 20m.

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.

Unit : mm

Wireless remote controller

147

56 17.5

About 380

Viewed from back (bottom direction pipe lead-out)

D

C

B

A

L

N

D

C

B

A

Indoor Unit

Outdoor Unit

Connecting Cord

Power supply cord

MODEL RAS-70YH7

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

Front panel

Suction grill

245

70

8

60

– 30 –

MODEL RAC-70YH7

Handle

Air suction

grille

16874

26 850

957

81

800

96

169.5

788

1010

10

320

340

Air outlet

340

2022 298

201

Handle

Holes for anchor bolt

(2-ø12)

Fixing hole

507 198

57

12 37

Notch for anchor bolt

(2-ø12 Notchs)

More than

100

More than

700

200

100

Service space

– 31 –

MAIN PARTS COMPONENT

THERMOSTAT (Room Temperature Thermistor)

Thermostat Specifications

INDOOR FAN MOTOR

Fan Motor Specifications

CONNECTION

TEMPERATURE °C (°F)

INDICATION

16

INDICATION

24

INDICATION

32

MODEL RAS-70YH7

THERMOSTAT MODEL IC

OPERATION MODE COOL HEAT

ON 15.6 (60.1) 20.0 (68.0)

OFF 15.3 (59.5) 20.7 (69.3)

ON 23.6 (74.5) 28.0 (82.4)

OFF 23.3 (73.9) 28.7 83.7)

ON 31.6 (88.9) 36.0 (96.8)

OFF 31.3 (88.3) 36.7 (98.1)

M

RED

BLK

WHT

YEL

BLU

100 ~ 322V

15V

0V

0 ~ 6.5V

FG

MODEL

RAS-70YH7

POWER SOURCE DC: 100 ~ 322V

OUTPUT 30W

(Control circuit built in)

BLU : BLUE YEL : YELLOW BRN : BROWN WHT : WHITE GRY : GRAY ORN : ORANGE GRN : GREEN RED : RED BLK : BLACK PNK : PINK VIO : VIOLET

COIL

MODEL

RAC-70YH7

POWER SOURCE DC: 120 ~ 380V

OUTPUT (W) MAX 47

OUTDOOR FAN MOTOR

Fan Motor Specifications

ITEM

M

WHITE (V)

BLACK (W)

M

RED (U)

RESISTANCE VALUE ( ) 20°C 2M U-V 35 ± 2.5 V-W 35 ± 2.5 W-U 35 ± 2.5

– 32 –

COMPRESSOR MOTOR

Compressor Motor Specifications

CAUTION

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

V/R (YELLOW)

W/S (RED)

U/C (WHITE)

MODEL

COMPRESSOR MODEL

PHASE SINGLE

RATED VOLTAGE AC 220 ~ 240 V

RATED FREQUENCY 50/60 Hz

POLE NUMBER 4

CONNECTION

20°C

(68°F)

75°C

(167°F)

( )

RESISTANCE VALUE

RAC-70YH7

JU1015D9

2M = 1.2984

U

V

W

WHITE

M

YELLOW

RED

2M = 1.7671

– 33 –

WIRING DIAGRAM

MODEL RAS-70YH7 / RAC-70YH7

BLU : BLUE YEL : YELLOW BRN : BROWN WHT : WHITE

GRY : GRAY ORN : ORANGE GRN : GREEN RED : RED

BLK : BLACK PNK : PINK VIO : VIOLET IVO : IVORY

– 35 –

CIRCUIT DIAGRAM

Remote Control

– 37 –

CIRCUIT DIAGRAM

MODEL RAS-70YH7

– 39 –

CIRCUIT DIAGRAM

MODEL RAC-70YH7

– 41 –

PRINTED WIRING BOARD LOCATION DIAGRAM

MODEL RAS-70YH7

MAIN P.W.B.

Marking on P.W.B

COMPONENT SIDE

SOLDERING SIDE

RECEIVING P.W.B.

Marking on P.W.B

– 42 –

MODEL RAC-70YH7

P.W.B. MAIN

– 43 –

P.W.B. IPM-BOARD

P.W.B. NF-BOARD

– 44 –

BLOCK DIAGRAM

MODEL RAS-70YH7/RAC-70YH7

1ø, 50/60Hz, 220~240V

(AX-8X10)

FM

Outdoor DC

Fan Motor

– 45 –

51.

53.

55.

57.

49.

29. 66

23

25

– 47 –

Table 1 Mode data file

LABEL NAME VALUE

WMAX

WMAX2 5700 min

–1

WSTD 5400 min

–1

WBEMAX 4000 min

–1

CMAX 5200 min

–1

CSTD 4900 min

–1

CKYMAX 4000 min

–1

CJKMAX 4000 min

–1

CBEMAX 2300 min

–1

WMIN 1200 min

–1

CMIN 1200 min

–1

STARTMC 60 Seconds

DWNRATEW 100%

DWNRATEC 100%

SHIFTW 0.00°C

SHIFTC 1.00°C

CLMXTP 30.00°C

YNEOF 25.00°C

TEION 2.00°C

TEIOF 9.00°C

SFTDSW 0.66°C

DFTIM_OTP0 50 Minutes

DFTIM_OTP10 50 Minutes

DFTIM_OTP5 60 Minutes

STARCPL 1600 min

–1

RAS-70YH7

5700 min

–1

– 49 –

Reversing valve (heating on mode)

NOTE (9)

NOTE (5)

Dash period

Silent

1

Notes: (1) Condition for entering into Cool Dashed mode. When fan set to “Hi” or “Auto mode” and temperature difference between indoor temperature and set temperature has a

corresponding compressor rpm (calculated value in Table 2) larger than CMAX.

(2) Cool Dashed will release when i) a maximum 25 minutes is lapsed and ii) room temperature is lower than set temperature –3°C (thermo off) and iii) when room temperature

has achieved setting temperature –1°C then maximum Cool Dashed time will be revised to 20 minutes. And iv) indoor fan is set to Lo and Med fan mode and v) change operation

mode. (3) During Cool Dashed operation, thermo off temperature is set temperature (with shift value) –3°C. After thermo off, operation continue in Fuzzy control mode. (4) Compressor minimum “ON” time and “OFF” time is 3 minutes. (5) During normal cooling mode, compressor maximum rpm CMAX will maintain for 60 minutes if indoor temperature is lower than CLMXTP. No time constrain if indoor temperature

is higher than CLMXTP. (6) When fan is set to “Hi”, compressor rpm will be limited to CKYMAX. (7) When fan is set to “Med”, compressor rpm will be limited to CJKMAX. (8) When fan is set to “Lo”, compressor rpm will be limited to CBEMAX. (9) During Cool Dashed, when room temperature reaches set temperature –1°C compressor rpm is actual rpm x DWNRATEC.

Temperature Calculated

difference compressor rpm

1.66 2265 min

–1

2 2435 min

–1

2.33 2600 min

–1

2.66 2765 min

–1

3 2935 min

–1

3.33 3100 min

–1

3.66 3265 min

–1

4 3435 min

–1

4.33 3600 min

–1

4.66 3765 min

–1

5 3935 min

–1

5.33 4100 min

–1

5.66 4265 min

–1

6 4435 min

–1

6.33 4600 min

–1

6.66 4765 min

–1

7 4935 min

–1

7.33 5100 min

–1

7.66 5265 min

–1

8 5435 min

–1

8.33 5600 min

–1

8.66 5765 min

–1

9 5935 min

–1

9.33 6100 min

–1

9.66 6265 min

–1

10 6435 min

–1

10.33 6600 min

–1

10.66 6765 min

–1

11 6935 min

–1

Table 2 ∆TCMAX

Note:

1. See the data in Table 1 on page 45 for each constant in capital letters in the diagrams.

– 51 –

Notes:

(1) The sleep operation starts when the sleep key is pressed. (2) When the sleep key is set, the maximum compressor speed is limited, and the indoor fan is set to “sleep Lo”. (3) 30 minutes after the sleep key is set, the sleep shift of temperature starts, and upper shift is made at least 6 times.

If 25˚C is not reached after 6 shifts, shifts repeat unit 25˚C is reached. (4) The sleep shift upper value of set temperature is 28˚C. (5) After 6 hours, a shift down to the initial set temperature is made at a rate of 0.33˚C/5 min. (6) If the operation mode is changed during sleep operation, the set temperature is cleared, and shift starts from the point

when switching is made. (7) The indoor fan speed does not change even when the fan speed mode is changed. (8) When operation is stopped during sleep operation, the set temperature when stopped, as well as the time, continue

to be counted. (9) If the set time is changed during sleep operation, all data including set temperature, time, etc. is cleared and restarted. (10) If sleep operation is canceled by the cancel key or sleep key, all data is cleared.

Cooling Sleep Operation

Compressor speed

Horizontal air deflector

Shut

Horizontal

Facing down

Maximum speed

Indoor fan

Outdoor fan

Timer lamp

Operation lamp

Sleep key

(Cooling/dehumidifying set temperature = Remote control set temperature (+) SHIFTC)

Final set temperature (Cooling/dehumidifying set temperature (+) sleep shift)

Set to 7 hours

0.5hr

1.5hr

3hr

P1

2.5hr 3.5hr 6hr 7hr

Hi

See basic operation

Med Lo

Silent (Sleep)

Lo

10 mins

Silent (Sleep)

– 53 –

– 55 –

1.33ßC.

SFTDSW

0.66ßC.

Fan speed set to "auto"

1 min.

Hi

Lo Hi Hi Hi

ultra Hi

Basic Heating Operation

Start

Stop Start Start StopStop

Thermo

OFF

Thermo

OFF

Heating set temperature (remote control set temperature (+))

Start/stop switch

Thermo judgment

Indoor fan

Ultra-Hi

Hi

Med

Lo

Silent (Sleep)

Ultra-Lo

Operation lamp

Max.

Rating

3000

0

Compressor speed

Outdoor fan

Reversing valve (heating "on" model)

Thermo OFF

Dash period

NOTE (5)

TWMAX

Wtd

Defrost signal

Preheating judgment

30sec. 30sec.

10sec.

15sec. 15sec.

15sec. 15sec. 15sec.

10sec.

15sec.

150sec. Delay

150sec. Delay150sec. Delay

3min.

Max. 3 min.

Preheating released

Control by heat exchanger temperature

15sec.

Control by heat exchanger temperature

18ßC

10sec.

30sec. 30sec.

10sec.

30sec. 30sec.30sec. 30sec. 30sec. 30sec.

10sec.

Preheat released

WMIN

(WSTD)

(WMAX)

NOTE (11)

WMAX2

Notes: (1) Condition for entering into Hot Dashed mode. When fan set to “Hi” or “Auto mode” and i) Indoor temperature is lower than 18°C, and ii) outdoor temperature is lower than 10°C,

and iii) Temperature difference between indoor temperature and set temperature has a corresponding compressor rpm (calculated value in Table 3) larger than WMAX. (2) Hot Dashed will release when i) Room temperature has achieved the set temperature + SFTDSW. ii) Thermo off. (3) During Hot Dashed operation, thermo off temperature is set temperature (with shift value) +3°C. After thermo off, operation continue in Fuzzy control mode. (4) Compressor minimum “ON” time and “OFF” time is 3 minutes. (5) During normal heating mode, compressor maximum rpm WMAX will maintain for 120 minutes if indoor temperature is higher than 18°C. No time limit constrain if indoor temperature

is lower than 18°C and outdoor temperature is lower than 2°C. (6) During Hotkeep or Defrost mode, indoor operation lamp will blink at interval of 3 seconds “ON” and 0.5 second “OFF”. (7) When heating mode starts, it will enter into Hotkeep mode if indoor heat exchanger temperature is lower than YNEOF + 0.33°C. (8) When fan is set to “Med” or “Lo”, compressor rpm will be limited to WBEMAX. (9) In “Ultra-Lo” fan mode, if indoor temperature is lower than 18°C, indoor fan will stop. If indoor temperature is higher than 18°C + 0.33°C, fan will continue in “Ultra-Lo” mode.

During Hotkeep or Defrost mode, fan will continue in “Ultra-Lo” mode. (10) During Hot Dashed or outdoor temperature is lower than –5°C, compressor rpm is WMAX2. (11) During Hot Dashed, when room temperature reaches set temperature + SFTDSW compressor rpm is actual rpm x DWNRATEW.

Temperature Calculated

difference compressor rpm

1.66 1965 min

–1

2 2135 min

–1

2.33 2300 min

–1

2.66 2465 min

–1

3 2635 min

–1

3.33 2800 min

–1

3.66 2965 min

–1

4 3135 min

–1

4.33 3300 min

–1

4.66 3465 min

–1

5 3635 min

–1

5.33 3800 min

–1

5.66 3965 min

–1

6 4135 min

–1

6.33 4300 min

–1

6.66 4465 min

–1

7 4635 min

–1

7.33 4800 min

–1

7.66 4965 min

–1

8 5135 min

–1

8.33 5300 min

–1

8.66 5465 min

–1

9 5635 min

–1

9.33 5800 min

–1

9.66 5965 min

–1

10 6135 min

–1

10.33 6300 min

–1

10.66 6465 min

–1

11 6635 min

–1

Table 3 ∆TWMAX

Notes:

1. See the data in Table 1 on page 47 for each constant in capital letters in the diagrams.

– 57 –

DFTIM_OTP5

DFTIM_OTP10

DFTIM_OTP0

DFTIM_OTP0.

DFTIM_OTP0

1. Refer to the Table 1 Mode data file on page 47 for the constants expressed by capital alphabet letters in the drawing.

– 59 –

REFRIGERATING CYCLE DIAGRAM

MODEL RAS-70YH7/RAC-70YH7

INDOOR UNIT

OUTDOOR UNIT

COOLING, DEHUMIDIFYING, DEFROSTING

OUTDOOR UNIT

HEATING

INDOOR UNIT

COMP

S-TANK

(5/8")

5S VALV E

SILENCER

(1/4")

2S VALV E

EXPANSION VALVE

STRAINER

COND

REVERSING VALV E

COMP

S-TANK

(5/8")

5S VALV E

(1/4")

2S VALV E

EXPANSION VALVE

HEX

THERMISTOR

STRAINER

COND

REVERSING VALV E

SILENCER

HEX

THERMISTOR

– 60 –

OPERATING SPECIFICATION

REFERENCE

OPERATION OPERATION MODE AIR DEFLECTOR

PRESENT CONDITION

KEY INPUT

THERMO. ON

(INTERNAL FAN

ON)

THERMO. ON

(INTERNAL FAN

OFF)

MAIN SWITCH

ON

MAIN SWITCH

OFF

CHANGE OF

OPERATION

STOP

DURING

OPERATION

DURING

OPERATION

STOP

DURING

OPERATION

DURING

OPERATION

EACH MODE

AUTO COOL

COOL

FAN

AUTO DRY

DRY

AUTO HEAT

HEAT

CIRCULATOR

AUTO DRY

DRY

AUTO HAET

HEAT

CIRCULATOR

COOL

FAN

DRY

HEAT

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.

INPUT SIGNAL

– 61 –

1. 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, ZD202 is turned ON, the potential of Q201’s base rises and Q202 is turned ON. Since Q202’s collector is set to “LO” at this time, Q202 is turned OFF and the reset input of the micro computer is set to “Lo”. The DC 5V line voltage has already become 5V at this time and the micro computer starts operation.

● When the power is turned OFF, the voltage of the DC 12V line decreases. When it becomes about 7V, ZD202

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

POWER ON

12V

7V

5V

DC12V Line

DC5V Line

Base

POWER OFF

5V

Micro computer Pin 7

12V

5V

0V

Q201

C202

7

Micro computer

RES

Q202

ZD202

R205

R201

R204

R202

R203

+

C201

AX-7X30

DESCRIPTION OF MAIN CIRCUIT OPERATION

RAS-70YH7

– 62 –

2. Buzzer Circuit

Micro computer

(AX-7X30)

BUZZER

BZ1

12V

0V

R301

Q301

B.Z

30

When the buzzer is to be activated, buzzer output pin 30 of the micro computer alternates between ON and OFF repeatedly at 4kHz and Q301 is turned ON/OFF accordingly. A 4kHz voltage/frequency is applied to the buzzer and the diaphragm of the buzzer vibrates to output 4kHz sound.

3. Initial setting (IC401)

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

4. Receive circuit

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

87

IC401

(E 2PROM)

65

Micro computer

(AX-7X30)

26

27

R404

R403

12 4

3

5V

0V

5V

D401

45

2

1

6

3

0V

SDA

SCL

C1104

R141

R1109

0V

Receiver

Unit

12V

13

Micro computer

(AX-7X30)

REMOCON I/P

– 63 –

5. Auto Sweep Motor Circuit

18

17

16

15

7

6

5

4

8

10

IC501

12V

CN12/CN11

Auto sweep motor for horizontal air deflectors

Rotor

0V

11

12

13

1

2

3

4

5

Fig. 5-1 Auto Sweep Motor Circuit (Horizontal air deflectors only)

● Fig. 5-1 shows the Auto sweep motor drive circuit; the signals shown in Fig. 5-2 are output from pins

– of the micro computer.

Micro computer pins

Step width

Horizontal air

deflectors: 10ms.

12345678

Horizontal air deflectors

10

11

12

13

Fig. 5-2 Micro computer Output Signals

● As the micro computer’s outputs change as shown in Fig. 5-2, the core of the auto sweep motor is excited

to turn the rotor. Table 5-1 shows the rotation angle of horizontal air deflectors.

Rotation angle per step (° )

0.0879

Time per step (ms)

10Horizontal air deflectors

Table 5-1 Auto sweep Motor Rotation

15 18

– 64 –

6. Room Temperature Thermistor Circuit

● Fig. 6-1 shows the room temperature

thermistor circuit.

0V

Room temperature thermistor

0V

5V

Fig. 6-1

A

R309

C302

Micro computer

Room temp. input

R310

0V

Heat exchanger temperature thermistor

0V

5V

Fig. 7-1

A

R307

C301

Micro computer

Heat exchanger temperature input

R308

5

4

3

2

1

0

010

Fig. 6-2

20 30 40

Voltage at

(V)A

5

4

3

2

1

0

010

-10

Fig. 7-2

20 30 40

Voltage at

(V)A

64

63

7. Heat exchanger temperature thermistor circuit

● The voltage at A depends on the room

temperature as shown in Fig. 6-2.

● The circuit detects the indoor heat

exchanger temperature and controls the following.

(1) Low-temperature defrosting during

cooling and dehumidifying operation.

The voltage at A depends on the heat exchanger temperature as shown in Fig. 7-2.

– 65 –

8. Temporary Switch

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

is lost or faulty.

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

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

0V

C601

R611

48

R609

5V

Temporary switch

TEMPORARY SW

MICRO COMPUTER

Fig. 8-1

9. Indoor Fan Motor Feedback Circuit

● Fan motor will receive signal thru Joint Connector with VDC (Motor Drive Voltage), VCC (Motor Controller

Power Supply), VSC (RPM Instruction) motor WCC return the FG sinal under frequency RPM.

● The circuit produces fan motor drive from 340V DC supplied from the indoor unit and controls the fan

motor speed.

CAUTION 1

Indoor fan motor circuit will be connected with primary power source line and please take care of the electrical shock.

I O

G

0V

20V

5V

15V

0V

VDC

FM

GND

VCC

VS

FG

JOINT CONNECTOR

1

3

4

5

6

340V

R501

ZD201

IC201

Q503

Q502

Q204

PC202

PC201

R510

R504 R503

C991

C992

R502

R501

R502 R507

R509

C503

C504

R508

C505

0V

R234 R233

R232

C231

CAUTION 2

Please do not disconnect the fan motor connector during running due to the high voltage supply, it will cause the damage at fan motor and PWB.

● <Exp. of circuit wave>

JOINT

CONNECTOR

Fig. 9-1

Fig. 9-2

– 66 –

220-240

3.15A

RAC-70YH7

– 67 –

AC220~240V

DC260~360V

– 68 –

C001 ~ C007, C015, C016, C026, C027, L004, L005

J25

J23

J58

J25

– 69 –

3. Reversing valve control circuit

● Reversing valve control circuit can switch reversing valve ON/OFF according to instruction from indoor

microcomputer depending on the operation condition shows in Table 3-1.

Voltage at each point in each operation condition is approximately as shown below when measured by tester. (When collector voltage of Q401 is measured)

4

1

28

36

I/F 0V

Fig. 3 – 1

D401

CN2

Q401

DC voltmeter or tester

Reversing valve

R435

MICROCOMPUTER

PQ701

1

23

4

12V

HIC

I/F 35V

R436

V

R437

Operation condition Collector voltage of Q401

Cooling

Heating

Dehumidifying

General operation of Cooling

In normal heating operation

MAX. rotation speed instructed by indoor microcomputer after defrost is completed

Defrosting

Sensor dry

About 0.8V

About 35V

About 0.8V

Table 3-1

– 70 –

– 71 –

– 72 –

(3.15A Fuse)

– 73 –

3.15A

(DC260~360V)

– 74 –

SERVICE CALL Q & A

COOLING MODE

DEHUMIDIFYING MODE

HEATING MODE

Q1

Q2

A1

A2

A1

A2

A3

Q3

Q1

Q2

Q3

A3

Q4 A4

The compressor has stopped suddenly during cooling operation.

Check if indoor heat exchanger is frosted. Wait for 3-4 minutes until it is defrosted.

If the air conditioner operates in cooling mode when it is cold, the evaporator may get frosted.

– 75 –

AUTO FRESH DEFROSTING

NICE TEMPERATURE RESERVATION

AUTO OPERATION

Q1

Q2

Q1

Q2

A1

A2

Q3

A3

A1

A2

Q3

A3

– 76 –

– 77 –

– 78 –

TROUBLE SHOOTING

– 79 –

DISCHARGE PROCEDURE AND METHOD TO STOP ENERGIZE THE POWER CIRCUIT

– 80 –

– 81 –

3.15A

circuit diagram

Replace fuse or P.W.B Main.

Replace P.W.Bs.

140 50

CHECKING THE INDOOR TIMER LAMP IF BLINKING 1 TIME

– 82 –

CHECKING THE INDOOR/OUTDOOR UNIT ELECTRICAL PARTS AND REFRIGERATING CYCLE

Does the timer lamp on the indoor unit blink?

Is the compressor in the outdoor unit operating?

Does the operation lamp on the indoor unit start to light or blink?

Remove the outdoor unit cover and electrical parts cover, and check self-diagnosis lamp LD301

Does LD301 blink one time ? * Repeats 0.25-second on and 2-second off.

Blinking other than one time

One-time blinking

Yes

Yes No

No

Normal

No

Timer lamp

Press the service switch for 1 sec. Does the compressor operate? (After checking, be sure to press the service switch to stop the operation).

Check the refrigerating cycle.

Check the outdoor electrical parts.

Check the indoor electrical parts.

Check to see whether the Fcable is connected incorrectly or disconnected

See Out door unit self-diagnosis lamp lighting mode .

See Troubleshooting when the timer lamp blinks .

Is approx. DC 33 to 37V being generated? Is the polarity correct?

Remove the terminal cover and check the voltage between terminal (C) and terminal (D)

Terminal C

Terminal A

Terminal B

(+35V)

Terminal D

(0V)

– 83 –

TROUBLESHOOTING WHEN TIMER LAMP BLINKS.

Perform troubleshooting according to the number of times the indoor timer lamp and outdoor LD301 blink.

SELF-DIAGNOSIS LIGHTING MODE

No. Blinking of Timer lamp Reason for indication Possible cause

Reversing valve defective When the indoor heat exchanger

temperature is too low in the heating mode or it is too high in the cooling mode.

Outdoor unit forced operation When the outdoor unit is in forced

operation or balancing operation after forced operation

Indoor/outdoor interface defective When the interface signal from the

outdoor unit is interrupted.

Outdoor electrical assembly defective.

Room thermistor or heat exchanger thermistor is faulty When room thermistor or heat exchanger thermistor is opened circuit or short circuit.

Over-current detection at the DC fan motor when over-current is detected at the DC fan motor of the indoor unit.

IC401 or IC402 data reading error When data read from IC401 or IC402 is incorrect.

(1) Reversing valve defective (2) Heat exchanger thermistor dis-

connected

(only in the heating mode) (Note) The malfunction mode is entered the 3rd time this abnormal indication appears (read every 3 minutes).

Electrical parts in the outdoor unit

(1) Indoor interface circuit (2) Outdoor interface circuit

Please check at the outdoor electrical led lamp blinking (LD301) and refer to self diagnosis lighting mode for outdoor unit.

(1) Room thermistor (2) Heat exchanger thermistor

(1) Indoor fan locked (2) Indoor fan motor (3) Indoor control P.W.B.

IC401 or IC402 abnormal

(1) If the interface circuit is faulty when power is supplied, the self-diagnosis display will not be displayed.

(2) If the indoor unit does not operate at all, check to see if the F-cable is connected or disconnected.

(3) To check operation again when the timer lamp is blinking, you can use the remote control for operation

(except for mode mark 1).

1

2

3

4

5

6

7

( –– Lights for 0.5 sec. at interval of 0.5 sec..)

–– 10 times

– ––––– 3 times

– ––––––– 1 time

– –––––– 2 times

–– 13 times1

–– 9 times

–– 4 times

5 sec.

– 84 –

1. Power does not come on (no operation)

Is AC 220-240V AC being generated between terminals L and N on the outdoor unit terminal board?

Is DC 35V being generated between terminals C and D on the outdoor unit terminal board?

Check the indoor/outdoor unit connection cable, and correct any defective section (wrong connection, incomplete insertion reversed).

Check AC outlet and breaker, and repair any defective part.

Check the outdoor unit power circuit, and repair the defective section.

Is DC 35V being generated between terminals C and D on the terminal board?

Are control voltages (12V, 5V) being generated normally?

Check according to the proper method for checking the power circuit.

No No

No

Yes

Do the air deflectors perform initial operation when the power supply is turned on and off?

Check the indication P.W.B. connection cord and light receiving unit.

No

Is the microcomputer reset input (pin 7 ) Hi ?

Replace the control P.W.B

Perform final operation check.

Check the reset circuit, and repair any defective section.

Yes

No

Is the microcomputer clock signal 10MHz at pin

10 11

being

generated normally?

Replace the microcomputer and oscillator.

Yes

CHECKING INDOOR UNIT ELECTRICAL PARTS

– 85 –

2. Outdoor unit does not operate (but receives remote infrared signal)

– 86 –

3. Only indoor fan does not operate (other is normal)

Check the T001 and interface relay.

501

Disconnect joint connector at indoor fan motor and set to the fan mode again.

4. Air deflector does not move (others are normal)

5. All systems stop from several seconds to several minutes after operation is started (all indicators are also off)

– 87 –

6. Check the main P.W.B (power circuit)

IC101

Is DC 35V being output at terminals C and D?

Is DC 35V being output between cathode and mode of D701

Is DC 12V being supplied accross the control side (coil terminal) of interface relay

Replace the interface relay

D701 and C701 may be defective

There is a defective between the 12V output of switching power supply and interface relay.

– 88 –

Has the 3.15A fuse blown?

Replace outdoor P.W.Bs.

Replace outdoor P.W.B Main.

Replace outdoor P.W.B Main

Replace outdoor P.W.B Main.

– 89 –

test/

Replace outdoor P.W.B Main.

– 90 –

AC220~240V

AC240V

P.W.Bs.

Replace outdoor P.W.B Main.

P.W.Bs

– 91 –

Replace outdoor P.W.B Main.

Replace fan motor.

Replace outdoor P.W.B Main.

– 92 –

1. Switch OFF main power supply.

2. Short circuit between JW001 and JW002.

3. Switch ON main power supply – LD302 will blink 1 time.

4. (Within 3 minutes) Press Test/Service Switch for 1 second or more.

5. Self-diagnosis result will be shown – LD303 will ON (LIT) and LD301 will be blinking. Then refer to diagnosis

table 2.

6. Switch OFF main power supply. Then release back JW001 and JW002 to original condition (no short

circuit condition).

* If step No. 6 is not carried out, the system will not operate properly until 3 minutes has lapsed after

restore the power supply.

In case of service person forgot to release JW001 and JW002 to original condition;

Case 1: If main power supply continuously ON, outdoor microcomputer will keep showing diagnosis result (LD303 will

ON and LD301 will blinks).

Case 2: If main power supply OFF at once, then switch ON again:

a) Outdoor microcomputer will wait the self check command (by pressing test/service switch) within 3 minutes

(LD302 blinks 1 time). If test/service signal input is not received, unit will return to normal operation mode after this 3 minutes has lapsed. (LD302 OFF and LD301 blinks 1 time).

Case 3: If main power supply OFF at once, then switch ON again and on indoor unit by remote control;

a) Indoor unit will receive remote control signal and send signal to outdoor unit. For the first 3 minutes, outdoor

micro-computer will ignore this indoor signal (LD302 blinks 1 time).

b) After 3 minutes has lapsed (LD302 OFF and LD301 blinks 1 time), unit will return to normal operation mode.

– 93 –

– 94 –

– 95 –

SELF-DIAGNOSIS LIGHTING MODE

1. Switch OFF main power supply.

2. Short circuit between JW001 and JW002.

3. Switch ON main power supply

– LD302 will blink 1 time.

4. (Within 3 minutes) Press Test/Service Switch for 1

second or more.

5. Self-diagnosis result will be shown

– LD303 will ON (LIT)

and LD301 will be blinking. Then refer to diagnosis table 2.

6. Switch OFF main power supply. Then release back

JW001 and JW002 to original condition (no short circuit

condition).

* If step No. 6 is not carried out, the system will not

operate properly until 3 minutes has lapsed after restore

the power supply.

– 96 –

CHECKING THE REMOTE CONTROLLER

– 97 –

CHECKING THE REFRIGERATING CYCLE

1. Troubleshooting procedure (No operation, No heating, No cooling)

Connect U,V,W phase leads to the power module again and operate the air conditioner.

Gas leaks. Repair and seal refrigerant.

Is the self-diagnosis lamp mode as shown on the right?

YES

Gas leaking (less than 4kg/cm

2

G)

(less than 0.39 MPaG)

Normal (0.39-0.98 MPaG) (4-10 kg/cm

2

G)

Perform a final check of operation.

When the self-diagnosis lamp lights in the same condition as above.

The compressor is defective. Replace it and seal refrigerant.

If the compressor checker for an inverter type air conditioner is available, re-check using it.

( )

(JUDGING BETWEEN GAS LEAKAGE AND COMPRESSOR DEFECTIVE)

Blinking off

Time until the

lamp lights

Approx. 10 seconds

Within Approx. 30 seconds

Compressor

Gas leakage

Possible

malfunctioning

part

LD301

Selfdiagnosis lamp

Lighting mode

Blinks

2 times

Blinks

3 times

Blinks

4 times

Blinks

5 times

Blinks

6 times

Blinks

8times

Stop to operate and check the gas pressure in balancing mode.

Checking the system power module

– 98 –

PARTS LIST AND DIAGRAM

INDOOR UNIT MODEL : RAS-70YH7

1

9

4

5

8

2

3

12

11

10

7

25

6

26

20

16

19

13

15

18

22

14

24

17

21

23

– 99 –

1 PMRAS-30CHP6 002 1 CABINET ASSY

2 PMRAS-72CHA3 013 1 MOUNTING PLATE

3 PMRAS-80YHA R01 1 FAN MOTOR

4 PMRAS-80YHA R04 1 TANGENTIAL FAN

5 PMRAS-72CHA3 017 1 P-BEARING ASSY

6 PMRAS-72CHA3 007 1 FAN MOTOR SUPPORT

7 PMRAS-70YH7 R03 1 CYCLE ASSY

8 PMRAS-72CHA3 005 1 BEARING COVER

9 PMRAS-24CE9G 004 1 PIPE SUPPORT (U-COVER)

10 PMRAS-80YHA R05 1 DRAIN PAN ASSY

11 PMRAS-72CHA3 R01 4 AUTO SWEEP MOTOR

12 PMRAS-70YH7 R04 1 P.W.B (LED)

13 PMRAS-80YH5 003 1 FRONT COVER ASSY

14 PMRAS-80YH5 002 1 FRONT PANEL

15 PMRAS-10C7M 008 3 CAP

16 PMRAS-72CHA3 009 1 FILTER (R)

17 PMRAS-70YH7 R02 1 REMOTE CONTROL ASSY

18 PMRAS-10C3M 003 1 REMOTE CONTROL SUPPORT

19 PMRAS-72CHA3 008 1 FILTER (L)

20 PMRAS-72CHA3 R22 1 THERMISTOR

21 PMRAS-70YHA1 006 1 S-COVER R

22 PMRAS-70YH7 R01 1 P.W.B (MAIN)

23 SVP-2WDS62329A 1 SE-COVER

24 PMRAS-72CHA3 015 1 P.W.B (RECEIVER)

25 PMRAS-72CHA3 024 1 FAN COVER

26 PMRAS-72CHA3 018 1 PIPE SUPPORT

MODEL RAS-70YH7

PART N0.NO. Q’TY / UNIT

PARTS NAME

– 100 –

PARTS LIST AND DIAGRAM

OUTDOOR UNIT

MODEL : RAC-70YH7

18

23

24

32

28

12

11

6

10

1

27

9

30

14

26

13

5

4

20

19

21

22

29

7

3

8

2

25

31

34

16

15

17

33

– 101 –

1 PMRAC-60YH7 S01 1 COMPRESSOR

2 KPNT1 001 6 PUSH NUT

3 RAC-2226HV 805 3 COMPRESSOR RUBBER

4 PMRAC-70YHA S03 1 CONDENSER

5 PMRAC-70YHA1 999 1 REVERSING VALVE

6 PMRAC-25NH4 S03 1 ELECTRICAL EXPANSION COIL

7 PMRAC-80YHA 905 1 VALVE (5S)

8 PMRAC-50NH4 S03 1 VALVE (2S)

9 PMRAM-72Q8 S03 1 THERMISTOR (OH)

10 PMRAC-25NH4 S09 1 OVERHEAT THERMISTOR SUPPORT

11 PMRAC-X13CX 906 1 OVERLOAD RELAY COVER

12 PMRAC-50YHA2 S07 1 THERMISTOR (DEFROST)

13 PMRAC-50YHA2 S09 1 COIL (REVERSING VALVE)

14 PMRAC-50YHA2 S04 1 REACTOR

15 PMRAC-70YHA2 S01 1 P.W.B (MAIN)

16 PMRAC-70YHA2 S02 1 P.W.B (IPM)

17 PMRAS-25NH4 S13 1 TERMINAL BOARD (4P)

18 PMRAM-72Q8 S03 1 THERMISTOR (OUTSIDE TEMPERATURE)

19 PMRAC-70YHA 907 1 PROPELLER FAN

20 PMRAC-70YHA S12 1 SUPPORT (FAN MOTOR)

21 PMRAC-70YHA2 S05 1 FAN MOTOR

22 PMRAC-70YHA S01 1 CABINET

23 PMRAC-70YHA S06 1 NET

24 PMRAC-24CP5 905 1 TOP COVER

25 PMRAC-70YHA S09 1 SIDE PLATE-R

26 PMRAC-70YHA2 S04 1 STRAINER (COND)

27 PMRAC-70YHA 910 1 STRAINER (PIPE)

28 PMRAC-70YHA 908 1 SIDE PLATE-L

29 PMRAC-70YHA S05 1 GRILL

30 PMRAC-80YHA 906 1 EXPANSION VALVE

31 PMRAC-70YHA 915 1 SV-COVER

32 PMRAC-70YHA 916 1 NET COVER

33 PMRAC-63CA1 S02 1 TERMINAL BOARD (2P)

34 PMRAC-70YHA2 S03 1 P.W.B (NF-BOARD)

MODEL RAC-70YH7

PART N0.

NO.

Q’TY / UNIT PARTS NAME

PM NO. 0465E

Printed in Malaysia

RAS-70YH7 / RAC-70YH7