RASS18H2A - Air Conditioning HITACHI - Free user manual and instructions

Product type	Split air conditioner
Brand	Hitachi
Indoor model	RAS-S18H2A
Outdoor model	RAC-S18H2
Indoor dimensions (W × H × D)	780 × 280 × 215 mm
Outdoor dimensions (W × H × D)	850 × 650 × 298 mm
Operating modes	Auto, Heat, Cool, Dehumidify, Fan
Fan speed	Auto, High, Medium, Low, Quiet
Remote control	Yes, range of approximately 7 m
Timer	Off, On, On+Off, Sleep
Air filter	Non-washable cleaning filter, replacement recommended every year
Filter maintenance	Cleaning every 2 weeks (vacuum or water, dry in shade)
Front panel	Washable with clean water, removable
Safety	Automatic restart after power cut, 3-minute protection, circuit breaker required
Power consumption in standby	Approximately 8 W
Outdoor operating temperature (cooling)	21 °C to 43 °C
Outdoor operating temperature (heating)	2 °C to 21 °C
Indicator lights	Operation, Timer, Filter (200 h)
Temporary switch	Yes, for troubleshooting without remote control

Frequently Asked Questions - RASS18H2A HITACHI

How to use the remote control?

Point the emission window towards the indoor unit. Use the ON/OFF button, mode selector (Auto, Heat, Cool, Dehumidify, Fan) and fan speed. Range of approximately 7 m.

What to do if the device does not turn on?

Check that the circuit breaker is in the ON position and the fuse is good. Check the remote control batteries. If the problem persists, use the temporary switch on the indoor unit with a non-conductive rod.

How to set the timer to stop the device at a specific time?

Press OFF-TIMER, set the time with the dial, then press RESERVE. The (OFF) icon flashes then lights up. To cancel, use CANCEL.

Why is the FILTER indicator lit?

The FILTER indicator lights up after 200 hours of operation to indicate that the air filter needs cleaning. After cleaning, press the AUTO SWING button while in standby mode to turn off the indicator.

How to clean the air filter?

Open the front panel, remove the filter. Vacuum the dust or wash it with cold water (max 40°C) with a soft brush. Dry in the shade and replace with the FRONT mark facing forward.

Can I use the air conditioner during a thunderstorm?

It is recommended to turn off the circuit breaker during a thunderstorm to protect the device from power surges.

What does the flashing of the operation indicator during defrosting mean?

The indicator flashes in cycles of 3 seconds on, 0.5 seconds off during automatic defrosting. This lasts about 5 to 10 minutes every hour. Do not worry.

How to switch to silent mode?

Press the FAN SPEED button several times until SILENT is displayed on the remote control screen. This mode reduces fan noise.

The device does not cool enough, what to check?

Check that the air filter is not dirty, that the air inlets/outlets are not blocked, that the set temperature is correct, and that doors/windows are closed. If the outdoor unit is in direct sunlight, shade it.

Should I turn off the device if I am away for a long time?

Yes, if you are not using it for an extended period, turn off and cut the circuit breaker to save energy (approximately 8W in standby). Before stopping, run in fan mode at high speed for half a day to dry the inside.

USER MANUAL RASS18H2A HITACHI

SPLIT TYPE AIR CONDITIONER

Line drawing of a cylindrical air conditioner unit with no text or symbols

RAS-S18H2A

OUTDOOR UNIT

Line drawing of a rectangular air conditioner unit with ventilation grilles and mounting feet (no text or symbols)

RAC-S18H2

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.

The sign in the figure indicates prohibition.

Indicates the instructions that must be followed.

- Please keep this manual after reading.

PRECAUTIONS DURING INSTALLATION

WARNING	Do not reconstruct the unit. ●Water leakage, fault, short circuit or fi re may occur if you reconstruct the unit by yourself.
	Please ask your sales agent or qualifi ed technician for the installation of your unit.Water leakage, short circuit or fi re 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 specifi ed piping set for R410A. Otherwise, this may result in broken copper pipes or faults.
CAUTION	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 fl ammable gas. The outdoor unit may catch fi re if fl ammable gas leaks around it.
	Please ensure smooth flow of water when installing the drain hose.

PRECAUTIONS DURING SHIFTING OR MAINTENANCE

[D276]WARNING	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 fi re 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 fi re.
	Please contact your agent if you need to remove and reinstall the unit. Electric shock or fi re 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.

PRECAUTIONS DURING OPERATION

WARNING	Avoid an extended period of direct air flow for your health. ●
		● Do not insert a finger, a rod or other objects into the air outlet or inlet. As the fan is rotating at a high speed, it will cause injury. Before cleaning, be sure to stop the operation and turn the breaker OFF.
	Do not use any conductor as fuse wire, this could cause fatal accident. ●
		● During thunder storm, disconnect and turn off the circuit breaker.

PRECAUTIONS DURING OPERATION

CAUTION

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, fi rm and without defect. If not, the outdoor unit may collapse and cause danger.

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

- Do not use any aerosol or hair sprays near the indoor unit. This chemical can adhere on heat exchanger fi n 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 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.

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 defl ector facing down or moving automatically for a long period of time, water will condense on the air defl ector 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 infi rm 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.

INDOOR UNIT

BEACH

AIR FILTER

To prevent dust from coming into the indoor unit.

(Refer Instruction manual)

FRONT PANEL

INDOOR UNIT INDICATORS

Light indicator showing the operating condition.

(Refer page 3)

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)

NOTE

• Air cleansing filters are not washable and can be use in 1 year time. Type number for this air cleansing filter is . 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 lose its deodorizing function. For maximum performance, it is recommended to replace it every 1 year depending on application requirements.

OUTDOOR UNIT

Technical line drawing of a front air conditioner unit with fan and ventilation grilles (no text or symbols)

DRAIN PIPE

Condensed water drain to outside.

CONNECTING CORD

AIR INLET (BACK, LEFT SIDE)

AIR OUTLET

MODEL NAME AND DIMENSIONS

MODEL	WIDTH (mm)	HEIGHT (mm)	DEPTH (mm)
RAS-S18H2A	780	280	215
RAC-S18H2	850	650	298

INDOOR UNIT INDICATORS

TEMPORARY SWITCH

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”.

OPERATION LAMP

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

(1) During preheating

For about 2–3 minutes after starting up.

(2) During defrosting

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

TIMER LAMP

This lamp lights when the timer is working.

OPERATION INDICATOR

Temporary Switch Press Non-conductor Stick TEMPORARY SWITCH

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.

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, measure 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.

HITACHI 100°C H ① ℃

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).

AUTO SWING button

Controls the angle of the horizontal air defl ector.

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.

	AUTO
	HEAT
	DEHUMIDIFY
	COOL
	FAN
	FAN SPEEDSILENTLOWMEDHI
	SLEEPING
	STOP (CANCEL)
	START (RESERVE)
	START/STOP
	TIME
	TIMER SET
	TIMER SELECTORON TIMEROFF TIMER
	AUTO SWING

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.

■ 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.

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

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.

1 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). START STOP Press the (START/STOP) button. 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. 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. Press the (FAN SPEED) button, AUTO, LOW and SILENT is available.

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^ of the outdoor temperature.

1 Press the FUNCTION selector so that the display indicates (HEAT). 2 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. 3 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 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.

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.)

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.

graph TD
    A["1: Press the FUNCTION selector so that the display indicates DEHUMIDIFY.<br>The FAN SPEED is set at LOW or SILENT."] --> B["2: Set the desired room temperature with the TEMPERATURE button (the display indicates the setting)."]
    B --> C["3: The range of 20-26°C is recommended as the room temperature for dehumidifying."]
    C --> D["START STOP: Press the ① (START/STOP) button. Dehumidifying operation starts with a beep. Press the button again to stop operation."]
    D --> E["■ As the settings are stored in memory in the remote controller, you only have to press the ②(START/STOP) button next time."]

■ Dehumidifying Function

• When the room temperature is higher than the temperature setting: The device will dehumidify the room, reducing the room temperature to the preset level.
  When the room temperature is lower than the temperature setting: Dehumidifying will be performed at the temperature setting slightly lower than the current room temperature, regardless of the temperature setting. The function will stop (the indoor unit will stop emitting air) as soon as the room temperature becomes lower than the setting temperature.
• The preset room temperature may not be reached depending on the number of people present in the room or other room conditions.

Use the device for cooling when the outdoor temperature is -10\~43°C.

If in doors humidity is very high (80%), some dew may form on the air outlet grille of the indoor unit.

1 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 fi rst 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. 3 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. 3 START STOP Press the ① (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 ①(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 ①(START/STOP) button next time.

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

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.

1 Press the FUNCTION selector so that the display indicates * (FAN). 2 Press the × (FAN SPEED) button. HI) : The strongest air blow. MED) : Fan speed slow. LOW) : Fan speed slower. (SILENT) : Fan speed ultra slower. START STOP Press the ① (START/STOP) button. Fan operation starts with a beep. Press the button again to stop operation.

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.
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.

HITACHI TIME OFF TIMER ON TIMER RESERVE CANCEL

Time

After you change the batteries;

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

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

ON-Timer

(Stop) → Start

The device will turn on at the ● designated times.

1 Press the ON-TIMER button the (ON) mark blinks on the display.

ON/OFF-Timer

1 Press the ⏻(ON-OFF) button so that the ⏻ (OFF) mark blinks.

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.

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.

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.

2 Press the (TIME) button.

3 Set the current time with the TIMER control button.

4 Press the ⓣTIME) button again. The time indication starts lighting instead of fl ashing.

▶ → [IMAGE] → [IMAGE] → [IMAGE] AM 18:88 PM 1:30

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

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.

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

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.

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

The setting of turn-off time is now complete.

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

3 Point the signal window of the remote controller toward the indoor unit, and press the Ⅰ (RESERVE) button. The ⏻(ON) mark starts lighting instead of fl ashing and the ⏻(RESERVED) sign lights. A beep occurs and the ⏻(TIMER) lamp lights on the indoor unit.

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.

PM 10:30 AM 7:00

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.

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.

• 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.
  ● (RESERVE) settings are stored in memory in the remote controller, you only have to press the button in order to use the same settings next time.

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.

HITACHI 3 H 25 11:30 * ⑧ ⑨ ① SLEEP ℃

Mode	Indication
Sleep timer	1 hour 2 hours→3 hours 7 hours ▶—▶—— Sleep timer off ←

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.

Sleep timer → Start The device will be turned off by the sleep timer and turned on by on-timer. 1 Set the ON-timer. 2 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 it will be turned on 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.

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.

Push and pull to the direction of arrow

Diagram of a mobile phone internal structure showing an open case, cable, and socket (no text or labels)

CAUTION

Do not use new and old batteries, or different kinds of batteries together. Take out the batteries when you do not use the remote controller for 2.2 or 3 months.

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.)

CIRCUIT BREAKER

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

Suitable Room Temperature

Illustration of a person with wavy lines indicating discomfort or pain (no text or symbols)

Warning

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

Install curtain or blinds

Illustration of a person opening a window with curtains, no text or symbols present

It is possible to reduce heat entering the room through windows.

Ventilation Effective Us

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.

Illustration of a person hanging from a window with curtains (no text or symbols)

Of Timer

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.

Illustration showing a person sleeping with a moon and sun icons, indicating sleep or night activity.

Do Not Forget To Clean The Air Filter

Dusty air fi liter will reduce the air volume and the cooling effi ciency. To prevent from wasting electric energy, please clean the fi liter every 2 weeks.

Illustration of a vacuum cleaner on a grid with smoke and steam (no text or symbols)

Please Adjust Suitable Temperature For Baby And Children

Please pay attention to the room temperature and air flow direction when operating the unit for baby, children and old folks who have difficulty in movement.

ement.

The Air Conditioner And The Heat Source In The Room

Caution

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

Simple line drawing of a fire extinguisher emitting smoke and water, with no text or symbols present.

Not Operating For A Long Time

When the indoor unit is not to be used for a long period of time, please switch off the power from the mains. If the power from mains remains "ON", the indoor unit still consumes about 8W in the operation control circuit even if it is in "OFF" mode.

OFF

When Lightning Occurs

Warning

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

Simple line drawing of an air conditioner with exhaust smoke and sound waves (no text or symbols)

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

CAUTION

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

Open the front panel.

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

Illustration of a hand holding a rectangular object with an arrow indicating rotation (no text or symbols)

Remove the fi Iter.

- Push upward to release the claws and pull out the filter.

Line drawing of a hand pressing down on a curved panel with a downward arrow (no text or symbols)

Attaching the air cleansing filters to the filter.

- Attach the air cleansing fi Iters to the frame by gently compress its both sides and release after insertion into fi Iter frame.

Claws (4 places)

CAUTION

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

Line drawing of a hand pressing down on a curved panel with an arrow indicating the motion (no text or symbols)

Attach the fi Iters.

Attach the fi Iters 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.

Simple line drawing of a cylindrical object with three downward arrows indicating flow or force (no text or symbols)

NOTE

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

• The cooling capacity is slightly weakened and the cooling speed becomes slower when the air cleansing fi liters 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.

CAUTION

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 fi Iter, as it removes dust inside the room. In case the air fi Iter 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 fi Iter following the procedure below.

PROCEDURE

Open the front panel and remove the fi lter Gently lift and remove the air cleansing fi lter● from the air fi lter frame.

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

Illustration of hands holding a rectangular object with an arrow indicating rotation (no text or symbols)

Line drawing of a hand pressing down on a device casing with a downward arrow indicating the action (no text or symbols)

Re-insert the air cleansing fi lter to the fler frame. Set the fi lter with "FRONT" mark facing front, and slot them into the original state. After attaching the fi lters, push the front panel at three arrow portions as shown in fi gure and close it.

Simple line drawing of a cylindrical object with three downward arrows indicating flow or force (no text or symbols)

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.

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.

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Illustration of a person cleaning a wall with a smiling face and a remote control (no text or symbols)

Removing the Front Panel

Arm

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

Projection Hole Flange

Move the projections of the left and right arms● into the Flanges in the unit and securely insert them into the holes.

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.

BENZINER C D CHINNER

CAUTION

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

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 fi ne day, and dry the whole of the unit.
• Switch off the power plug.

Air Blow

REGULAR INSPECTION

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

1		Is the earth line disconnected or broken?
2		Is the mounting frame seriously affected by rust and is the outdoor unit tilted or unstable?
3		Is the plug of power line fi rmly plugged into the socket?(Please ensure no loose contact between them).

WHEN ASKING FOR SERVICE, CHECK THE FOLLOWING POINTS.

CONDITION CHECK THE FOLLOWING POINTS
If the remote controller is not transmitting a signal.Remote controller display is dim or blank.)	Do the batteries need replacement?Is the polarity of the inserted batteries correct?
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?
When it does not cool wellWhen it does not hot well	Is the air filter blocked with dust?Does sunlight fall directly on the outdoor unit?●Is the airflow 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”?●

Illustration of a smiling man in a suit giving two thumbs up (no text or symbols)

Notes

In quiet operation or stopping the operation, the following phenomena may● occasionally 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.

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.

Note

- Avoid to use the room air conditioner for cooling operation when the outside temperature is below 21°C (70°F).

The recommended maximum and minimum operating temperatures of the hot and cold sides should be as below:

		Cooling Heating
		Minimum Maximum Minimum Maximum
Indoor	Dry bulb °C 21	32	20	27
	Wet bulb °C 15	23	12	19
Outdoor	Dry bulb °C 21	43	2	21
	Wet bulb °C 15	26	1	15

MEMO

HITACHI

Line drawing of a cylindrical air conditioner unit with no text or symbols

RAS-S18H2A

AUSSENGERÄT

Line drawing of a rectangular air conditioner unit with ventilation grilles and ventilation ducts (no text or symbols)

RAC-S18H2

SICHERHEITSHINWEISE

Technical line drawing of a front-mounted air conditioner unit with fan and ventilation grilles (no text or symbols)

ABFLUSSROHR

TEMPORARY SWITCH

FILTER-KONTROLLAMPE

▶ → [IMAGE] ▶ → [IMAGE] AM PM 18:00 PM 1:30

PM 10:30 AM 7:00

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Warnung

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Illustration of a person hanging from a window with curtains (no text or symbols)

Illustration showing a person sleeping with a moon and sun icons, indicating sleep or vision-related actions.

Simple line drawing of a vacuum cleaner on a grid base with smoke and spray (no text or symbols)

Illustration of a person lying on their back with a no-smoking symbol overlay (no text or symbols present)

Simple line drawing of a steam cooker emitting exhaust smoke next to a cylindrical container with liquid and bubbles (no text or symbols)

Simple line drawing of an air conditioner with exhaust smoke and fan (no text or symbols)

Illustration of a hand holding a rectangular object with an arrow indicating rotation (no text or symbols)

Line drawing of a hand pressing down on a curved panel with a downward arrow (no text or symbols)

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Simple line drawing of a cylindrical object with three downward arrows indicating flow or force (no text or symbols)

HINWEIS

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VORSICHT

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Illustration of a person cleaning a wall-mounted appliance with sparkles (no text or symbols)

BENZINE C D CHINNER

VORSICHT

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Hinweise

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RAS-S18H2A

UNITE D'EXTÉRIEUR

Line drawing of a rectangular air conditioner unit with fan blades and ventilation grille (no text or symbols)

RAC-S18H2

PRÉCAUTION DE SÉCURITÉ

Technical line drawing of a curved air duct or duct with internal grid structure and dimension lines (no text or symbols)

FILTRE À AIR

Technical line drawing of a car air conditioner unit with fan and ventilation duct (no text or symbols)

TUYAU D'ÉCOULEMENT

TEMPORARY SWITCH

TÉMOIN FILTRE

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Avertissement

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Illustration of a person opening curtains with draped curtains (no text or symbols)

ace

du programmateur

Illustration showing a person sleeping with a thought bubble indicating the moon and sun, symbolizing sleep or night activity.

Simple line drawing of a vacuum cleaner on a grid base with smoke and steam (no text or symbols)

Simple line drawing of a steam cooker emitting exhaust smoke next to a cylindrical container (no text or symbols)

Simple line drawing of an air conditioner with exhaust smoke and sound waves (no text or symbols)

Illustration of a hand holding a rectangular object with an arrow indicating rotation (no text or symbols)

Retirez le fi ltre.

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Line drawing of a hand pressing down on a curved panel with an arrow indicating left motion (no text or symbols)

Simple line drawing of a cylindrical object with three downward arrows indicating flow or force (no text or symbols)

REMARQUE

Illustration of a hand holding a rectangular object with two arrows indicating rotation (no text or symbols)

Line drawing of a hand pressing down on a device casing with a downward arrow indicating the action (no text or symbols present)

Simple line drawing of a cylindrical object with three downward arrows indicating flow or force (no text or symbols)

ATTENTION

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Illustration of a person cleaning a wall with a smiling face and flying a remote (no text or symbols)

BENZIN C D HINNER

ATTENTION

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Remarques

Line drawing of a wall-mounted air conditioner unit (no text or symbols)

RAS-S18H2A

UNITA' ESTERNA

Line drawing of a rectangular air conditioner unit with ventilation grilles and fan grille (no text or symbols)

RAC-S18H2

Technical line drawing of a car air conditioner unit (no text or symbols)

FILTRO DELL'ARIA

INDICATORI UNITÀ INTERNA

Line drawing of a wall-mounted air conditioner unit with fan and ventilation duct (no text or symbols)

TUBO DI DRENAGGIO

TEMPORARY SWITCH

SPIA FILTRO

PM 10:30 AM 7:00

Diagram of a device's internal structure showing an open casing, internal components, and a separate base plate (no text or symbols present)

ATTENZIONE

Illustration of a person with wavy lines indicating discomfort or pain (no text or symbols)

Avvertenza

Illustration of a person standing near a window with curtains, no text or symbols present

Illustration of a person opening curtains with draped curtains (no text or symbols)

b del timer

Illustration showing a person sleeping with a moon and sun icons, indicating sleep or vision-related actions.

Illustration of a cleaning machine with a cloth and a bag, emitting smoke (no text or symbols)

Simple line drawing of a steam cooker emitting exhaust smoke next to a cylindrical container (no text or symbols)

Simple line drawing of a wall-mounted air conditioner with sound waves and exhaust lines (no text or symbols)

Illustration of a hand holding a rectangular object with two arrows indicating rotation (no text or symbols)

Line drawing of a hand pressing down on a wall-mounted device with a downward arrow indicating compression (no text or symbols)

Line drawing of a hand pressing down on a curved panel with an arrow indicating left motion (no text or symbols)

Simple line drawing of a cylindrical object with three downward arrows indicating flow or force (no text or symbols)

NOTA

Illustration of a hand holding a rectangular object with two arrows indicating rotation (no text or symbols)

Line drawing of a hand pressing down on a curved panel with a downward arrow (no text or symbols)

Simple line drawing of a cylindrical object with three downward arrows indicating flow or force (no text or symbols)

ATTENZIONE

Line drawing of hands washing a surface with water droplets (no text or symbols)

Illustration of a person cleaning a wall with a smiling face and flying a remote (no text or symbols)

Illustration of a smiling man in a suit giving two thumbs up (no text or symbols)

Note

Line drawing of a cylindrical air conditioner unit with no text or symbols

RAS-S18H2A

UNIDAD EXTERIOR

Line drawing of a rectangular air conditioner unit with ventilation grille and mounting base (no text or symbols)

RAC-S18H2

Technical line drawing of a curved airship or duct system with internal compartments and mounting points (no text or symbols)

FILTRO DE AIRE

Line drawing of a front-mounted air conditioner unit with fan and ventilation grilles (no text or symbols)

TUBO DE DRENAJE

TEMPORARY SWITCH

LÁMPARA FILTRO

PM 10:30 AM 7:00

Diagram of a device's internal structure showing an open casing, internal components, and a separate base plate (no text or symbols present)

PRECAUCIÓN

Illustration of a person with wavy lines indicating discomfort or pain (no text or symbols)

Advertencia

Illustration of a person waving while looking through a window with curtains (no text or symbols)

Illustration of a person opening curtains with draped curtains (no text or symbols)

temporizador

Illustration showing a person sleeping with moon and sun icons, indicating sleep-related conditions.

Line drawing of a vacuum cleaner with smoke and foam, no text or symbols present

Simple line drawing of a steam cooker emitting exhaust smoke next to a cylindrical container with liquid and bubbles (no text or symbols)

Si no se utiliza durante un período prolongado

Simple line drawing of a car with exhaust smoke and a wall-mounted sensor (no text or symbols)

Illustration of a hand holding a rectangular object with an arrow indicating rotation (no text or symbols)

Retire el fi Itro.

Line drawing of a hand pressing down on a wall-mounted device with a downward arrow indicating force (no text or symbols)

as iones)

PRECAUCIÓN

Line drawing of a hand pressing down on a curved panel with an arrow indicating left motion (no text or symbols)

Acople los filtros.

Simple line drawing of a cylindrical object with three downward arrows indicating flow or force (no text or symbols)

NOTA

Illustration of a hand holding a rectangular object with two arrows indicating rotation (no text or symbols)

Line drawing of a hand pressing down on a curved panel with a downward arrow (no text or symbols)

Simple line drawing of a cylindrical object with three downward arrows indicating flow or force (no text or symbols)

PRECAUCIÓN

Line drawing of hands washing a cup over a surface, no text or symbols present

Illustration of a person cleaning a wall with a smiling face and a remote control (no text or symbols)

Retirada del panel frontal

Brazo

Illustration of a smiling man in a suit giving two thumbs up (no text or symbols)

Notas

Line drawing of a cylindrical air conditioner unit with no text or symbols

RAS-S18H2A

UNIDADE EXTERIOR

Line drawing of a rectangular air conditioner unit with a circular vent grille (no text or symbols)

RAC-S18H2

PRECAUÇÕES DE SEGURANÇA

Line drawing of an air conditioner unit with fan and vertical measurement lines (no text or symbols)

TUBO DE ESCOAMENTO

TEMPORARY SWITCH

LÁMPADA FILTRO

PM 10:30 AM 7:00

Diagram of a device's internal structure showing an open casing, internal components, and a separate base plate (no text or symbols)

CUIDADO

Illustration of a person with wavy lines indicating discomfort or pain (no text or symbols)

Aviso

Illustration of a person standing near a window with curtains, waving (no text or symbols)

Illustration of a person opening curtains with draped drapery (no text or symbols)

z do Temporizador

Illustration showing a person sleeping with a moon and sun, indicating sleep duration or brightness change.

Illustration of a vacuum cleaner cleaning a tray with smoke (no text or symbols)

Illustration of a person lying on their back with a no-smoking symbol overlay (no text or symbols present)

Simple line drawing of a steam cooker emitting exhaust smoke next to a cylindrical container with liquid and bubbles (no text or symbols)

Simple line drawing of an air conditioner with exhaust smoke and fan (no text or symbols)

Illustration of a hand holding a rectangular object with an arrow indicating rotation (no text or symbols)

Retire o fi ltro.

Line drawing of a hand pressing down on a curved panel with a downward arrow (no text or symbols)

Line drawing of a hand pressing down on a curved panel with an arrow indicating the motion (no text or symbols)

Monte o fi Itro.

Simple line drawing of a cylindrical object with three downward arrows indicating flow or force (no text or symbols)

NOTA

Illustration of a hand holding a rectangular object with two arrows indicating direction (no text or symbols)

Line drawing of a hand pressing down on a device casing with a downward arrow indicating the action (no text or symbols)

Simple line drawing of a cylindrical object with three downward arrows indicating flow or force (no text or symbols)

CUIDADO

Line drawing of hands washing a cylindrical object over a surface, with no text or symbols present

Illustration of a person cleaning a wall-mounted appliance with a smiling face and sparkles (no text or symbols)

Remover o Painel Frontal

Braço

Illustration of a smiling man in a suit giving two thumbs up (no text or symbols)

Notas

Line drawing of a cylindrical air conditioner unit with no text or symbols

RAS-S18H2A

ΕΞΩΤΕΡΙΚΗ ΜΟΝΑΔΑ

Line drawing of a rectangular air conditioner unit with fan blades and ventilation grilles (no text or symbols)

RAC-S18H2

ΠΡΟΦΥΛΑΞΗ ΑΣΦΑΛΕΙΑΣ

Line drawing of a small air conditioner unit with fan and vertical measurement lines (no text or symbols)

TEMPORARY SWITCH

ΛΑΜΠΑΚΙ ΦΙΛΤΡΟΥ

Diagram of a device's internal structure showing an open case, battery pack, and cable assembly (no text or labels)

⚠️ ΠΡΟΣΟΧΗ

Illustration of a person with wavy lines indicating discomfort or pain (no text or symbols)

Προειδοποίηση

Illustration of a person waving while looking through a window with curtains (no text or symbols)

Illustration of a person hanging from a window with curtains (no text or symbols)

χρήση του

Illustration showing a person sleeping with a moon and sun icons, indicating sleep or night activity.

Simple line drawing of a vacuum cleaner on a tray with smoke and spray (no text or symbols)

Illustration showing a person lying on the floor with a prohibition symbol over a sheet of paper, accompanied by partial text mentioning 'time, economy'.

Simple line drawing of a steam cooker emitting exhaust smoke next to a cylindrical container (no text or symbols)

Simple line drawing of an air conditioner with exhaust smoke and fan (no text or symbols)

Illustration of a hand holding a rectangular object with an arrow indicating rotation (no text or symbols)

Line drawing of a hand pressing down on a curved panel with a downward arrow (no text or symbols)

Line drawing of a hand pressing down on a curved panel with an arrow indicating the motion (no text or symbols)

Simple line drawing of a cylindrical object with three downward arrows indicating flow or force (no text or symbols)

ΣΗΜΕΙΩΣΗ

Illustration of two hands holding a rectangular object with an arrow indicating rotation (no text or symbols)

Line drawing of a hand pressing down on a device casing with a downward arrow indicating the action (no text or symbols)

Simple line drawing of a cylindrical object with three downward arrows indicating flow or force (no text or symbols)

⚠️ ΠΡΟΣΟΧΗ

Line drawing of hands washing a surface with water splashing (no text or symbols)

Illustration of a person cleaning a wall-mounted appliance with a smiling face and sparkles (no text or symbols)

Illustration of a smiling man in a suit giving two thumbs up (no text or symbols)

Σημειώσεις

Line drawing of a cylindrical air conditioner unit with no text or symbols

RAS-S18H2A

ВНУТРЕННИЙ БЛОК

Line drawing of a rectangular air conditioner unit with fan grille and ventilation grilles (no text or symbols)

RAC-S18H2

Technical line drawing of a cylindrical air duct or duct with internal grid structure and measurement annotations (no readable text or symbols)

ВОЗДУШНЫЙ ФИЛЬТР

Technical diagram of an air conditioner unit with labeled components and measurement lines

ДРЕНАЖНАЯ ТРУБКА

TEMPORARY SWITCH

ЛАМПА ФИЛЬТРА

PM 10:30 AM 7:00

Diagram of a device's internal structure showing an open case, cable connectors, and a separate package (no text or symbols present)

ОСТОРОЖНО

Illustration of a person with wavy lines indicating discomfort or stress (no text or symbols)

Внимание!

Illustration of a person opening a window with curtains, no text or symbols present

Illustration of a person hanging from a window with curtains (no text or symbols)

Illustration showing a person sleeping with a moon and sun, accompanied by a thought bubble indicating the moon's direction.

Illustration of a vacuum cleaner with smoke and foam, no text or symbols present

Simple line drawing of a boiler emitting exhaust smoke, with no text or symbols present.

Simple line drawing of an air conditioner with exhaust smoke and sound waves (no text or symbols)

Illustration of a hand holding a rectangular object with an arrow indicating rotation (no text or symbols)

Извлеките фильтр.

Line drawing of a hand pressing down on a curved panel with a downward arrow (no text or symbols)

Line drawing of a hand pressing down on a device panel with an arrow indicating left motion (no text or symbols)

Установите фильтры.

Simple line drawing of a cylindrical object with three downward arrows indicating flow or force (no text or symbols)

ПРИМЕЧАНИЕ

Illustration of two hands holding a rectangular object with an arrow indicating direction (no text or symbols)

Line drawing of a hand pressing down on a device panel with a downward arrow (no text or symbols)

Simple line drawing of a cylindrical object with three downward arrows indicating flow or force (no text or symbols)

ОСТОРОЖНО

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Illustration of a person cleaning a wall-mounted appliance with a smiling face and sparkles (no text or symbols)

Illustration of a smiling man in a suit giving two thumbs up (no text or symbols)

Примечания