Hitachi RAS-25YHA / RAC-25YHA RAS-35YHA / RAC-35YHA INDOOR UNIT Regular Inspection

Page 19

REGULAR INSPECTION

PLEASE CHECK THE FOLLOWING POINTS EVERY EITHER HALF YEARLY OR YEARLY. CONTACT YOUR SALES AGENT SHOULD YOU NEED ANY HELP.

 

 

Check to see if the unit’s earth line has been connected

1

 

correctly.

WARNING

If the earth line is disconnected or faulty, unit failure or electric

 

 

 

shock hazard may result.

 

Check to see if the mounting frame has rusted excessively

2

or if the outdoor unit has tilted or become unstable.

WARNING It could collapse or fall, causing injury.

 

Check to see if the power plug is securely inserted

 

into the wall socket.

3

If the power plug is not inserted into the wall socket securely,

it will become hot and an electric shock or fire may occured. If

WARNING

dust or dirt is found on the power plug, clean the plug and insert

 

it into the wall socket.

AFTER SALES SERVICE AND WARRANTY

WHEN ASKING FOR SERVICE, CHECK THE FOLLOWING POINTS.

 

CONDITION

CHECK THE FOLLOWING POINTS

 

 

 

 

 

 

 

 

 

 

 

 

 

If the remote controller is not

• Do the batteries need replacement?

 

transmitting a signal.

 

 

 

• Is the polarity of the inserted batteries correct?

 

(Remote controller display is

 

 

 

 

 

dim or blank.)

 

 

 

 

 

 

 

 

• Is the fuse all right?

 

 

 

• Is the voltage extremely high or low?

 

When it does not operate.

 

• Is the circuit breaker “ON”?

 

 

 

• Is the power plug inserted?

 

 

 

 

 

 

 

 

 

• Do you have any power cut?

 

 

 

 

 

 

 

• Is the air filter blocked with dust?

 

 

 

 

 

 

• Is the set temperature suitable?

 

When it does not cool well.

 

• Have the top and bottom air deflectors been adjusted to their correct

 

When it does not heat well.

 

positions according to the operation mode selected?

 

 

 

 

 

 

• Are the air inlets or air outlets of indoor and outdoor units blocked?

 

 

 

 

 

 

• Is the fan speed “LOW”?

 

 

 

 

OThe following phenomena do not indicate unit failure.

 

<Operation start>

During heating, the operation indicator

The unit is preparing to blow warm air. Please wait.

blinks and air blow stops

<In operation>

 

The outdoor unit is defrosting. Please wait.

 

 

Hissing or fizzy sounds

Refrigerant flow noise in the pipe or valve sound generated when flow rate is

 

adjusted.

 

 

Squeaking noise

Noise generated when the unit expands or contracts due to temperature

 

changes.

 

 

Rustling noise

Noise generated with the indoor unit fan’s rpm changing such as operation start

 

times.

 

 

Clicking noise

Noise of the motorized valve when the unit is switched on.

 

 

 

– 19 –

РУССКИЙ ∂ÏÏËÓÈο PORTUGUÊS SPANISH ITALIANO FRANÇAIS DEUTSCH ENGLISH

Image 19
Contents Indoor UNIT/OUTDOOR Unit Precautions During Shifting or Maintenance Precautions During InstallationDo not climb on the outdoor unit or put objects on it Precautions During OperationAir outlet Names and Functions of Each PartAttaching the negative ion stick to the filter frame Timer Lamp OrangeFilter Lamp Green Operation Lamp Yellow This lamp lights during operationFAN Speed selector Auto Swing button Timer control Signal emitting window/transmission signTemperature buttons Reset buttonsAutomatic Operation Various FunctionsAuto Heating OperationDehumidifying Operation Italiano Français Deutsch EnglishCooling Operation Italiano Français Deutsch EnglishFAN Operation OFF-Timer HOW to SET the TimerItaliano Français Time button Timer control buttonHOW to SET the Sleep Timer HOW to Exchange the Batteries in the Remote Controller Adjusting the AIR DeflectorsSpanish Italiano Français Deutsch English Procedure MaintenanceAIR Filter Maintenance AT Beginning of Long OFF Period Cleaning of Front PanelVarious Functions Timer PROGRAMMING/SLEEP Timer OperationInformation CapabilitiesCheck to see if the unit’s earth line has been connected After Sales Service and WarrantyCheck to see if the power plug is securely inserted Regular InspectionDetails, consult your sales agent Memo Memo Memo 447 a

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.