Perking noise

Noise of the ventilation fan sucking in air present in the drain hose and blowing out

dehumidifying water that had accumulated in the condensed water collector. For

 

details, consult your sales agent.

 

 

Changing operation noise

Operation noise changes due to power variations according to room temperature

changes.

 

 

 

Mist emission

Mist is generated as the air within the room is suddenly cooled by conditioned air.

 

 

Steam emitted from the outdoor unit

Water generated during defrosting operation evaporates and steam is emitted.

 

 

Odors

Caused as the smells and particles of smoke, food, cosmetics, etc. present in room

air become attached the unit and blown off into the room again.

 

 

 

The outdoor unit continues to operate

Defrosting is underway (as the heating operation is stopped, the microcomputer

checks frost accumulated in the indoor unit and instructs the unit to perform automatic

even if operation is stopped.

defrosting if necessary).

 

 

 

 

Shows preheating or defrosting operation is underway.

The OPERATION lamp is blinking.

As the protective circuit or preheat sensor operates when unit operation is stopped

during preheating and then restarted, or when operation mode is switched from

 

 

cooling to heating, the lamp continues to blink.

 

 

Does not reach the temperature

Actual room temperature may deviate slightly from the remote controller’s

setting.

temperature setting depending on the number of people in the room, indoor or

 

outdoor conditions.

•If the unit still fails to operate normally after performing the above inspections, turn the circuit breaker off and contact your sales agent im- mediately.

Notes

Contact your sales agent immediately if the fol- lowing phenomena should occur:

• The circuit breaker switches off or the fuse blows frequently.

• The switch operation is not stable.

• Foreign matter or water accidentally enters the unit interior.

• The power cord gets excessively hot or its insulation is torn or stripped.

• TIMER lamp on the indoor unit display blinks.

(As the nature of the failure can be identified by the blinking cycle, ) check the blinking cycle before turning off the circuit breaker.

• In quiet operation or stopping the running, 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 please clean the air filter and the evaporator regularly 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.

Please note:

On switching on the equipment, particularly when the room light is dimmed, a slight brightness fluctuation may occur. This is of no consequence.

The conditions of the local Power Supply Companies are to be observed.

– 20 –

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Hitachi RAS-25YHA / RAC-25YHA RAS-35YHA / RAC-35YHA INDOOR UNIT instruction manual Details, consult your sales agent
Page 19 Page 21

RAS-25YHA / RAC-25YHA RAS-35YHA / RAC-35YHA INDOOR UNIT specifications

Hitachi RAS-25YHA and RAS-35YHA indoor units represent cutting-edge technology in the world of air conditioning, designed to offer efficient cooling and heating solutions for residential and commercial spaces. These models prioritize comfort, energy efficiency, and advanced functionalities, making them ideal choices for modern living environments.

One of the prominent features of the RAS-25YHA and RAS-35YHA models is their robust energy efficiency. These units utilize advanced inverter technology, which allows the compressor to adjust its speed based on the cooling or heating demands of the space. As a result, users benefit from lower energy consumption and reduced electricity bills, while maintaining optimal temperature levels.

The sleek and compact design of the indoor units ensures they blend seamlessly into various interior styles. The units are available in a range of colors, catering to diverse aesthetic preferences while maintaining a minimalist look. This design not only enhances the overall appearance of the space but also maximizes airflow performance.

Both models are equipped with Hitachi’s innovative filter technology, which works to purify the air inside the environment. The filters effectively capture dust, allergens, and other particles, ensuring that occupants breathe cleaner and healthier air. Regular filter maintenance is simple, which adds to the overall convenience of using these units.

Another key feature is the quiet operation of the RAS-25YHA and RAS-35YHA. With specially designed fan blades and sound-dampening technology, these indoor units produce minimal noise, allowing users to enjoy a peaceful atmosphere whether at home or in the workplace.

The user-friendliness of these air conditioning units is enhanced by a remote control and an intuitive interface. Users can easily adjust the settings, change the modes, and schedule operations according to their convenience.

In summary, the Hitachi RAS-25YHA and RAS-35YHA indoor units are exemplary models that showcase advanced air conditioning technology. With their energy-efficient inverter systems, sleek designs, effective air purification, quiet operation, and user-friendly controls, they are an excellent investment for those seeking reliable and efficient climate control solutions in their spaces.
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