RAS-24LH1 - Air Conditioning HITACHI - Free user manual and instructions

Product Type	Split System Air Conditioner
Model	RAS-24LH1
Brand	Hitachi
Cooling Capacity	24000 BTU/h (7.0 kW)
Heating Capacity	27000 BTU/h (7.9 kW)
Power Supply	230V / 50Hz / 1 Phase
Refrigerant Type	R410A
Indoor Unit Dimensions (WxHxD)	1100 x 350 x 250 mm
Outdoor Unit Dimensions (WxHxD)	900 x 750 x 350 mm
Indoor Unit Weight	15 kg
Outdoor Unit Weight	55 kg
Energy Efficiency Ratio (EER)	3.5 (Cooling)
Inverter Technology	Yes
Air Flow Rate (High)	800 m³/h
Noise Level Indoor (Low/High)	25 / 45 dB(A)
Noise Level Outdoor	55 dB(A)
Timer Function	24-hour on/off timer
Sleep Mode	Yes
Auto Restart	Yes
Self-Cleaning Function	Yes (mold prevention)
Filter Type	Washable pre-filter
Remote Control	Included (wired/wireless)
Maintenance	Clean filters every 2 weeks; annual professional check

Frequently Asked Questions - RAS-24LH1 HITACHI

How often should I clean the air filters?

Clean the air filters every two weeks under normal usage. More frequently in dusty environments. Use a vacuum or wash with mild detergent and let dry completely before reinstalling.

What does the error code E1 mean?

Error code E1 indicates a communication fault between indoor and outdoor units. Check wiring connections and restart the unit. If persists, contact a professional.

Can I use an extension cord for the air conditioner?

No, do not use an extension cord. The air conditioner must be plugged directly into a dedicated outlet with the correct voltage (230V/50Hz). Improper connection can cause fire or electric shock.

How do I set the timer to turn off automatically?

Press the 'Timer' button on the remote control. Use the arrow buttons to set the desired off time (up to 24 hours). Press 'Set' to confirm. The unit will turn off after the set time.

What is the recommended temperature setting for sleep mode?

Sleep mode automatically adjusts the temperature for comfort. Typically, it increases cooling setpoint by 1°C after 1 hour and 2°C after 2 hours. You can customize the temperature offset in settings.

How do I switch between cooling and heating modes?

Press the 'Mode' button on the remote control repeatedly to cycle through Auto, Cool, Dry, Heat, and Fan modes. Select the desired mode and set the temperature.

What is the maximum pipe length between indoor and outdoor units?

The maximum piping length is 50 meters (164 ft) with a maximum height difference of 30 meters (98 ft). Longer pipes may reduce performance and require additional refrigerant.

Why is water leaking from the indoor unit?

Water leakage is often due to a blocked drain pipe or dirty air filters. Clean the filters and check the drain line for obstructions. If problem continues, call a technician.

How do I reset the air conditioner after a power outage?

After power returns, the unit may resume operation automatically if auto restart is enabled (default). If not, turn the unit off using the remote, wait 1 minute, then turn it back on.

Where can I find the model and serial number?

The model number (RAS-24LH1) and serial number are located on a rating plate on the side of the outdoor unit and inside the front panel of the indoor unit.

USER MANUAL RAS-24LH1 HITACHI

SPLIT TYPE AIR CONDITIONER

Line drawing of a Hitachi air conditioner unit (no text or symbols on the device itself)

RAC-18LH1
RAC-24LH1

INDOOR UNIT

Line drawing of a Hitachi air conditioner unit (no text or symbols)

RAS-18LH1
RAS-24LH1

Instruction manual Page 1\~24

To obtain the best performance, please read this instruction manual completely.

• 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

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

- 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

PRE-FILTER

To prevent dust from coming into the indoor unit. (Refer page 21)

FRONT PANEL (AIR INLET)

INDOOR UNIT INDICATORS

Light indicator showing the operating condition. (Refer page 5)

HORIZONTAL DEFLECTOR • VERTICAL DEFLECTOR (AIR OUTLET)

(Refer page 16)

REMOTE CONTROLLER

Send out operation signal to the indoor unit. So as to operate the whole unit. (Refer page 6)

OUTDOOR UNIT

Drain pipe

Condensed water drain to outside.

Connecting cord and insulation pipe for piping

Air inlet (Back and Left side)

Air outlet

MODEL NAME AND DIMENSIONS

CAUTION

- When heating operation, drain or defrosted water flows out from outdoor unit. Don't close drain outlet portion in chilly area so as not to freeze these.

MODEL	WIDTH (mm)	HEIGHT (mm)	DEPTH (mm)
RAS-18LH1 / RAS-24LH1	1030	295	207
RAC-18LH1 / RAC-24LH1	850	650	298

INDOOR UNIT INDICATORS

OPERATION LAMP

This lamp lights during operation.

The OPERATION LAMP fl ashes 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.

TIMER LAMP

This lamp lights when the timer is working.

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 POWER SWITCH set to OFF and ON again.

OPERATION INDICATOR

- This figure shows the opening condition of front panel. Refer to page 20 in relation to how to open or close the front panel.

AUTO RESTART SWITCH

• In the event of power failure, the air conditioner will restart automatically in the previously selected mode once the power is restored.
• In the event of power failure during TIMER operation, the timer will be reset and the unit will begin or stop operating under a new timer setting.

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.

	AUTO
	HEAT
	DEHUMIDIFY
	COOL
	FAN
	FAN SPEEDLOWMEDHI
	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.

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

■ Condition of Automatic Operation

Initial room temperature (approx.)		Temperature settingFunction	FAN SPEED
Over 27°C	COOL	27°C	HI at start, MED or LOW after the preset temperature is reached
23~27°C	DEHUMIDIFY	Slightly lower than the room temperature	LOW
Under 23°C	HEAT	23°C	HI at start, MED or LOW after the preset temperature is reached

• 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 -10^ of the outdoor temperature.

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["HITACHI 24°C"] --> B["1: Press the FUNCTION selector so that the display indicates ◇ (DEHUMIDIFY). The FAN SPEED is set at LOW automatically. The FAN SPEED button does not work."]
    A --> C["2: Set the desired room temperature with the TEMPERATURE button (the display indicates the setting)."]
    A --> D["3: The range of 20-26°C is recommended as the room temperature for dehumidifying."]
    A --> E["START STOP: Press the ① (START/STOP) button. Dehumidifying operation starts with a beep. Press the button again to stop operation."]
    A --> F["■ As the settings are stored in memory in the remote controller, you only have to press the ① (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.

Use the device for cooling when the outdoor temperature is 22-42°C.

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

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.

FAN SPEED (AUTO)

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

For the heating operation	● The fan speed will automatically change according to the temperature of discharged air.● When the difference of room temperature and setting temperature is large, fan starts to run at HI speed.● When the room temperature reaches setting temperature, fan speed changes to LOW automatically.
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.

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

Mode	Indication
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.

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 turn on early so that the preset temperature will be almost reached at 6:00 next morning.

How to Cancel Reservation

Point the signal window of the remote controller toward the indoor unit, and press the ○ (CANCEL) button.

The ⏻ (RESERVED) sign goes out with a beep and the ⏻ (TIMER) lamp turns off on the indoor unit.

Explanation of the sleep timer

The device will control the FAN SPEED and room temperature automatically so as to be quiet and good for people's health.

You can set the sleep timer to turn off after 1, 2, 3 or 7 hours. The FAN SPEED and room temperature will be controlled as shown below.

Operation with the sleep timer

Function Operation
Heating“○”	The room temperature will be controlled 5°C below the temperature and the FAN SPEED will be set to LOW setting 30 minutes after the setting of the sleep timer.
Cooling“※”and dehumidifying“◇”	The room temperature will be controlled 2°C above the temperature and the FAN SPEED will be set to LOW setting 30 minutes after the setting of the sleep timer. 2°CSleep timer set 6 hours later 2 hours later 3 hours later 30 minutes later 3 hours later
Fan“+”	The settings of room temperature and circulation are varied.

NOTE

• If date or current time is not set, sleep timer can not be set.
• If you set the sleep timer after the off-, on/off- or off/on-timer has been set, the sleep timer becomes effective instead of the off-, on/off- or off/on-timer set earlier.
• You can not set other timer during sleep timer operation.
• After sleep timer time is up and when press sleep button again, the sleep timer will be set as last setting.
  ● Sleep timer effective only once.

Time, Day, Month

After you change the batteries;

1 Set the current month and day with the TIMER control button.

OFF-Timer

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

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

ON-Timer

- The device will turn on at the designated times.

1 Press the 1 (ON-TIMER) button the 1 (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 I (ON-TIMER) button so that the ○ (OFF) mark lights and the I (ON) mark blinks.

How to Cancel Reservation

Point the signal window of the remote controller toward the indoor unit, and press the ○ (CANCEL) button.

The ⏻(RESERVED) sign goes out with a beep and the ⏻(TIMER) lamp turns off on the indoor unit.

NOTE

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

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.

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

Example:

The device will automatically turn on earlier so that the preset temperature can be reached at 7:00 a.m.

The setting of the turn-on time is now complete.

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 I (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 then automatically turn on earlier so that the preset temperature can be reached at 7:00 a.m.

The settings of the turn-on/off times are now complete.

• The timer may be used in three ways: off-timer, on-timer, and ON/OFF (OFF/ON)-timer. Set the current time at first because it serves as a reference.
• As the time settings are stored in memory in the remote controller, you only have to press the I (RESERVE) button in order to use the same settings next time.

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

The horizontal air defl ector is automatically set to the proper angle suitable for each operation. The defl ector can be swung up and down continuously and also set to the desired angle using the “× (AUTO SWING)” button.

• If the “☒ (AUTO SWING)” button is pressed once, the horizontal air defl ector swings up and down. If the button is pressed again, the defl ector stops in its current position. Several seconds (about 6 seconds) may be required before the defl ector starts to move.
• Use the horizontal air deflector within the adjusting range shown on the right.
• When the operation is stopped, the horizontal air deflector moves and stops at the position where the air outlet closes.

CAUTION

- In "Cooling" operation, do not keep the horizontal air defl ector swinging for a long time. Some dew may form on the horizontal air defl ector and dew may drop.

Adjustment of the conditioned air to the left and right.

Hold the vertical air deflector as shown in the figure and adjust the conditioned air to the left and right.

Line drawing of a hand pressing down on a wall-mounted air conditioner (no text or symbols)

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.

CAUTION

1. Do not use new and old batteries, or different kinds of batteries together.
2. Take out the batteries when you do not use the remote controller for 2 or 3 months.

Push and pull to the direction of arrow

Diagram of a device's internal components with an antenna inserted, showing no text or symbols

Suitable Room Temperature Ins

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

Warning

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

curtain or blinds

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

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.

Do Not Forget To Clean The Air Filter

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

Simple line drawing of a vacuum cleaner on a tray with smoke and motion lines (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.

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 steam cooker emitting smoke next to a cylindrical container with liquid and bubbles (no text or symbols)

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.

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 a car with a wall-mounted sensor emitting 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.

Product Operating Life

This term is valid only for the products, being purchased on the territory of Russian Federation.

In accordance with the article 5.2 of the Law "On Protection of Consumers" in operational conditions in Russian Federation the operating life of a domestic air conditioner is determined as 7 years from the date of manufacture. Considering the high quality, reliability and high level of operating safety of "Hitachi" products, the actual operating life may considerably exceed the official one.

This operating life is related to those parts of the product that are needed for its proper functioning under the following conditions:

● The item is properly assembled by a certified company and is used according to the service and operation manual.
● The repair and annual technical service are carried out by the company which installed this product

CAUTION

Cleaning and maintenance must be carried out when fi Iter lamp lights. 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.

Remove the pre-fi Iters.

- Push upward to release the claws and pull out the pre-fi Iters.

Attaching the air purifying fi Iters.

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

CAUTION

Do not bend the air purifying fi iter as it may cause damage to the structure.

Line drawing of a hand holding a rectangular air conditioner unit with arrows indicating motion (no text or symbols)

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

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

Attach the fi Iters.

• Attach the pre-fi Iters by ensuring that the surface written "FRONT" is facing front.
  ● After attaching the pre-fi Iters, push the front panel at three arrow portion as shown in fi gure and close it.

Line drawing of a car air conditioner unit with three downward arrows indicating airflow or cooling zones (no text or symbols)

NOTE

• In case of removing the air purifying filters, please follow the above procedures.
• The cooling capacity is slightly weakened and the cooling speed becomes slower when the air purifying fi Iters are used. So, set the fan speed to "HIGH" when using it in this condition.
• Air purifying filters are washable and reusable up to 20 times by using vacuum cleaner or water rinse under running tap water. Type number for this air purifying filter is . Please use this number for ordering when you want to renew it.
• Do not operate the air conditioner without pre-filters. Dust may enter the air conditioner and fault may occur.

CAUTION

Cleaning and maintenance must be carried out when filter lamp lights. Before cleaning, stop operation and switch off the power supply.

1. PRE-FILTER

Clean the pre-fi lter, as it removes dust inside the room. In case the pre-fi lter 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 pre-fi liters following the procedure below.

PROCEDURE

Open the front panel and remove the pre-fi Iters

- Gently lift and remove the air purifying fi lters from the air purifying fi lter frame.

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

Simple line drawing of a hand using a vacuum cleaner to clean or remove the surface (no text or symbols)

Line drawing of a hand holding a Bosch air conditioner cover (no text or symbols)

Diagram of a hand inserting a component into a device casing, showing a left-side arrow (no text or symbols present)

- Re-insert the air purifying fi Iters to the fi Iter frame. Set the pre-fi Iters with "FRONT" mark facing front, and slot them into the original state.

- After attaching the pre-fi Iters, push the front panel at three arrow portions as shown in fi gure and close it.

Line drawing of a cylindrical air conditioner unit with three downward arrows indicating airflow or cooling zones (no text or symbols)

NOTE:

● Air purifying filters 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.

CAUTION

• Do not wash with hot water at more than 40°C. The fi Iters may shrink.
• When washing it, shake off moisture completely and dry it in the shade; do not expose it directly to the sun. The filters may shrink.
• Do not use detergent on the air purifying filters 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.

Line drawing of hands washing a surface with a cloth, no text or symbols present

Illustration of a person cleaning a wall with a digital remote (no text or symbols)

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.

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.

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

• Run the unit by setting the operation mode to (COOL), the temperature to 32°C 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.

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 firmly plugged into the socket?(Please ensure no loose contact between them).

WHEN ASKING FOR SERVICE, CHECK THE FOLLOWING POINTS

CONDITION 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”?
When it does not cool wellWhen it does not hot well	Was the air fi Iter cleaned?Does sunlight fall directly on the outdoor unit?Is the air flow of the outdoor unit obstructed?Are the doors or windows opened, or is there any source of heat in the room?Is the set temperature suitable?

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 fi Iter 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.

Please note:

On switching on the equipment, particularly when the room light is dimmed, a slight brightness fl ectuation 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

HITACHI

Inspire the Next

Line drawing of a Hitachi air conditioner unit (no text or symbols on the device itself)

RAC-18LH1
RAC-24LH1

ВНУТРЕННИЙ БЛОК

Line drawing of a cylindrical air conditioner unit with ventilation slots and a labeled 'HITACHI' logo (no text or symbols on the device itself)

RAS-18LH1
RAS-24LH1

Instruction manual Page 1\~24

To obtain the best performance, please read this instruction manual completely.

ОСТОРОЖНО

Line drawing of a hand pressing down on a wall-mounted air conditioner panel with a curved arrow indicating rotation (no text or symbols)

Diagram of an open remote control casing with internal components and a separate slot, showing no text or symbols.

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

Внимание!

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)

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

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

Simple line drawing of a car with a warning light and explosion effect (no text or symbols)

Line drawing of a hand holding a rectangular air conditioner unit with arrows indicating motion (no text or symbols)

Выньте префильтр.

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

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

Line drawing of a cylindrical air conditioner unit with three downward arrows indicating airflow or cooling zones (no text or symbols)

ПРИМЕЧАНИЕ:

Line drawing of a hand holding a rectangular device with a label 'HISCH' and directional arrows indicating motion (no text or symbols on the device itself)

Diagram of a hand pressing down on a device casing with a highlighted panel (no text or symbols)

Simple line drawing of a hand using a vacuum cleaner to clean or store items (no text or symbols)

Diagram of a car air conditioner unit with downward arrows indicating airflow or cooling zones (no text or symbols)

ПРИМЕЧАНИЕ:

Line drawing of hands washing a surface with a cloth, no text or symbols present

Illustration of a person cleaning a wall with a digital remote (no text or symbols)

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

Примечания