HITACHI RAK-DJ25PHAT, RAK-DJ35PHAT, RAK-DJ50PHAT Split Type Air Conditioner Indoor Unit Instruction Manual

RAK-DJ25PHAT, RAK-DJ35PHAT,
RAK-DJ50PHAT Split Type Air Conditioner Indoor Unit
Instruction Manual

Instruction manual

To obtain the best performance and ensure years of trouble free use, please read this instruction manual completely.
This room air conditioner is only for residential usage.
Do not use for preservation of foods, animals, plants, precision machines, art, medicine or such.

SAFETY PRECAUTION

**** Please read the “Safety Precaution” carefully before operating the unit to ensure correct usage of the unit.
This appliance is filled with R32.

• 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 signs indicate the following meanings. (The following are examples of signs.)

Make sure to connect earth line.
Indicates the instructions that must be followed.
Ø This sign in the figure indicates prohibition.

PRECAUTIONS DURING INSTALLATION

****WARNING| •Do not reconstruct the unit.
Water leakage, fault, short circuit or fire may occur if you reconstruct the unit by yourself.|
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AWater
•Please ask your sales agent or qualified technician for the installation of your unit. leakage, short circuit or fire may occur if you install the unit by yourself.|
•Please use earth line.
Do not place the earth line near water or gas pipes, lightning-conductor, or the earth line of telephone. Improper installation of earth line may cause electric shock or fire.|
•Be sure to use the specified piping set for R32. Otherwise, this may result In broken copper pipes or faults.
•Do not use refrigerant other than the one indicated on the outdoor unit (R32) when moving or repairing.
Using other refrigerants may cause trouble or damage to the unit, and persona installing, injury.|

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 the unit near a location where there is flammable gas.
The outdoor unit may catch fire if flammable gas leaks around it.
•Please ensure smooth flow of water when installing the drain hose.
•Make sure that a single phase 220V-240V power source is used.
The use of other power sources may cause electrical components to overheat and lead to fire.|

PRECAUTIONS DURING SHIFTING OR MAINTENANCE

WARNING| • Should abnormal situation arise (like burning smell), please stop operating the unit and turn off the circuit breaker. Contact your fire may occur if you continue to operate the unit under abnormal situation. agent. Fault, short circuit or|
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• 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.

PRECAUTIONS DURING OPERATION

WARNING| • Avoid an extended period of direct airflow for your health.
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• Do not put objects like thin rods into the panel of blower and suction side because the high-speed fan inside may cause danger.
• Do not use any conductor as fuse wire, this could cause fatal accident.
• During thunder storm, disconnect the plug top and turn off the circuit breaker.
• Spray cans and other combustibles should not be located within a meter of the air outlets of both indoor and outdoor units.
As a spray can’s internal pressure can be increased by hot air, a rupture may result.

PRECAUTIONS DURING OPERATION

CAUTION| • This room air conditioner is only for residential usage.
Do not use for preservation of foods, animals, plants, precision machines, art, medicine or such.
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• The product shall be operated under the manufacturer specif ication 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 insuff iciency.
• 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. firm and without defect. If not. the outdoor unit may collapse and cause danger.
• Do not wash the unit with water or place a water container such as a vase on
the indoor unit.
Electrical leakage could be present and cause electric shock.
• Do not place plants or animals directly under the airf low as it is bad for the
plants or animals.
• Be sure to stop the operation by using the remote controller 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 be operated for a long period.
• Do not climb on the outdoor unit or put objects on it.
• When operating the unit with the door and windows opened, (the room humidity is always above 80%) and with the air def lector facing down or moving automatically for a long period of time, water will condense on the air deflector and drips down occasionally. This will wet your furniture. Therefore, do not operate under such condition for a long time.
• If the amount of heat in the room is above the cooling or heating capability
of the unit (for example: more people entering the room, using heating
equipments and etc.), the preset room temperature cannot be achieved.
• Indoor unit cleaning must be performed by authorized personnel only. Consult your sales agent.
Using a commercially available detergent or similar can damage the plastic parts or clog the drain pipe, causing water to drip with potential electric shock hazard.
• Do not spray pesticides, flammable sprays, deodorants, antibacterial agents, etc. on indoor units. because it may cause fire, deformation, refrigerant leakage, or water leakage.
• Do not touch the air outlet, bottom surface and aluminium f in of the outdoor unit.
You may get hurt.
• Do not touch the refrigerant pipe and connecting valve. Burns may result.
• This appliance is not to be used by children or persons with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction. Children must be supervised not to play with the appliance.

Operation Range

Names and Functions of Each Part
Indoor Unit

Model Name and Dimensions

Names and Functions of Each Part
Indoor Unit Indications **CAUTION**
Turn off the circuit breaker if the unit is not be operated for a long period.

• If the power stays on and the unit is not operated, power is slightly consumed in the control circuit. The power is saved by turning off the power switch (or the circuit breaker when the power is supplied from the outdoor unit).

Attaching the air purifying filters (Accessories) to the filter frame.

• Attach the air purifying filters to the C-case to the designated position.
• The cooling capacity is slightly weakened and the cooling speed becomes slower when the air purifying filters are used.
• The air purifying filters are not washable. It is recommended to use vacuum to clean. It can be used for 1 year. When you want to renew it, please ask your sales agent.

Maintenance

CAUTION

• Ensure unit and power supply is switched off before cleaning.
• Avoid touching any metal parts directly and do not use wet hands.
• Cleaning shall be carried out by competent person and able to follow below instruction.

Air Filter
Please clean the filter once about every two weeks. By doing so, energy costs are saved. In case the air filter is full of dust, the air flow will decrease and the cooling capacity will be reduced. Further, noise may occur. Be sure to clean the filter following the procedure below.
PROCEDURE

1. Open the front panel carefully and remove the filter.
2. Vacuum dust from the air filter using vacuum cleaner. If there is too much dust, wash the filter with a detergent and rinse it thoroughly. After that, dry it in the shade.
3. Set the filter with “FRONT” mark facing front, and slot them into the original state with putting the filter on the guide. and insert the hook to the hole. After attaching the filters, push the front panel at three arrow portions as shown in figure and close it.

NOTE:
Air purifying filter to be inspected at least once a month or sooner depending on the usage of the air conditioner. If noticeable loading occurs on the unit, please clean it to avoid deterioration of its deodorizing function. For better performance, it is advisable to replace it every 1 year (subject to usage and application requirements).
CAUTION

• Do not wash with hot water at more than 40°C. The filter may shrink.
• Do not wash with pressing hard on the filter, bending too much or using a brush. The filter may break.
• 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.
• Don’t operate the unit without filter. Fault may occur if you continue.

Cleaning of 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.

Removing the Front Panel

1. Push the end of the right-side arm outward to release the tab.
2. Move the left-side arm outward to release the left tab,and then pull the panel towards you.

Attaching the Front Panel

1. Insert the shaft of the left arm along the step on the unit into the hole.
2. Securely insert the shaft of the right arm along the step on the unit into the hole.
3. Make sure that the front panel is securely attached, and then close the front panel.

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.

Maintenance at Beginning of Long Off Period
Run the unit by setting the operation mode to (FAN) and the fan speed to Super High for about half 0a day on a fine day, and dry the whole of the unit.
Switch off the power plug or turn off the circuit breaker.

Information

Capabilities
Heating Capability

• This room air conditioner utilizes a heat pump system that absorbs exterior heat and brings it into a room to be heated. As the ambient temperature gets lower, heating capability will also lower. In such a situation, the inverter work to increase compressor rpm to keep the unit’s heating capability from decreasing. If the unit’s heating performance is still unsatisfactory, other heating appliances should be used to augment this unit’s performance.

• The air conditioner is designed to heat an entire room so that it may take some time before you feel warm. Timer operation is recommended for effective preheating ahead of the desired time.
  Cooling and Dehumidifying Capabilities

• If the heat present in a room exceeds the unit’s cooling capacity (for example, if there are many people in the room or other heating appliances are used), the preset room temperature may not be reached.

CAUTION
Do not use a stove or any other high temperature devices in proximity to the indoor unit. Refrigerant Information

• For the refrigerant charge information, please refer to the outdoor unit installation manual or specification label.

Refrigerant Information
For the refrigerant charge information, please refer to the outdoor unit installation manual or specification label.

1| |
WARNING| Check to see if the unit’s earth line has been connected correctly. If the
earth line is disconnected or faulty, unit failure or electric shock hazard
may result.
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2| |
WARNING| Check to see if the mounting frame has rusted excessively or if the utdoor unit has tilted or become unstable. It could collapse or fall, causing injury.

After Sales Service and Warranty
When Asking for Service, Check the Following Points. 

If the remote controller is not transmitting a signal.
remote controller display is blank or LCD display restarts on pressing of any key and there is no response from air conditioner unit.| • 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 power plug inserted?
• Do you have any power cut?
When it does not cool well.
When it does not heat well.| •  Is the air filter blocked with dust?
•  Is the set temperature suitable?
•  Have horizontal air deflectors been adjusted to their correct 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”or “SILENT”?

FrostWash Operation

FrostWash Operation does not start| It does not wash when outside temperature is less than about 1 degrees Celsius or more than 43 degrees Celsius.
It does not wash when the humidity in the room is about 30% or less or about 70% or more.
When “FrostWash” is done by operating a remote controller, it does not wash
when the room temperature is less than about 10 degrees Celsius or more than about 32 degrees Celsius.
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Within 60 minutes after the end of “FrostWash”, “FrostWash” is not operated for product protection.
Noise occurred during FrostWash operation| It is the sound that the internal machine is inflated and contracted by the temperature change and the fin of the heat exchanger is frozen and thawed
(Clean Function Lamp) blinks| Repeat for 1 second on and 1 second off for 10 seconds
Because “FrostWash” can not work when operating the “FrostWash” with remote controller.
The air conditioner is operating
– Outside air temperature, room temperature and room humidity are not suitable for “FrostWash”
It has not been over 60 minutes since the end of “FrostWash”
Repeat for 4 seconds on and 1 second off for 15 seconds Because FrostWash has not been done for a long time.
-*Operate the remote controller to operate “FrostWash”.

The following phenomena do not indicate unit failure.

During heating, the operation indicator blinks and air blow stops| <Operation start> •N
The unit is preparing to blow warm air. Please wait.