HITACHI RAI-25RPA Ceiling Cassette Type Air Conditioner User Manual

HITACHI RAI-25RPA Ceiling Cassette Type Air Conditioner

Specifications:

• Product Type : Ceiling Cassette Type Air Conditioner
• Models Available: RAI-25RPA, RAI-35RPA, RAI-50RPA

Product Information

The Ceiling Cassette Type Air Conditioner is designed for efficient cooling and heating of indoor spaces. It comes in three models – RAI-25RPA, RAI-35RPA, and RAI-50RPA. The unit includes safety features and indicators to ensure proper usage and maintenance.

Product Usage Instructions

• Safety Precautions:
  Before operating the unit, carefully read the safety precautions outlined in the manual to ensure correct usage. Pay special attention to warning signs that indicate potential risks of death or serious injury.

• Precautions During Installation:

  • Warning: Use the earth line properly during installation to prevent electric shock hazards. Avoid placing the earth line near water or gas pipes. Install a circuit breaker at the mounting site to prevent electric shock risks.
  • Caution: Improper installation of the earth line or lack of a circuit breaker can result in serious consequences. Follow installation instructions strictly for safety.

• Precautions During Shifting or Maintenance:
  In case of abnormal situations like a burning smell, stop operating the unit immediately. Do not attempt to remove or reinstall the unit yourself as it may lead to hazards. Replace damaged supply cords with special cords from authorized service centers

• Precautions During Operation:
  Avoid operating the unit with wet hands to prevent accidents. Do not direct cool air towards household heating apparatus to avoid interference with their operation. When cleaning, ensure water does not splash on the unit’s body to prevent short circuits.

Frequently Asked Questions (FAQ):

• Q: Can I use aerosols or hair sprays near the indoor unit?
  A: No, avoid using any aerosols or hair sprays near the indoor unit as the chemicals may cause water splashing when they come into contact with the drain pan.

• Q: What should I do if the unit is not used for a long period?
  A: Turn off the circuit breaker if the unit is not going to be operated for an extended period to ensure safety and energy efficiency.

CEILING CASSETTE TYPE AIR CONDITIONER
INDOOR UNIT

MODEL

• RAI-25RPA
• RAI-35RPA
• RAI-50RPA

INDOOR UNIT

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.
• Indicates the instructions that must be followed.
• The 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.
• Please ask your sales agent or qualified technician for the installation of your unit. Water 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.
• Be sure to use the specified piping set for R410A. Otherwise, this may result in broken copper pipes or faults.

|
---|---|---
CAUTION| |

•  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 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.

PRECAUTIONS DURING SHIFTING OR MAINTENANCE

• 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 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 fire.
• Please contact your agent if you need to remove and reinstall the unit. Electric shock or fire 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 center

PRECAUTIONS DURING OPERATION

| PRECAUTIONS DURING OPERATION
---|---
W ARNING|

•  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

• When operating the unit with the door and windows opened, (the room humidity is always above 80%) and with the air defector facing down or moving automatically for a long period of time, water will condense on the air defector 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 in turn 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.

NAMES AND FUNCTIONS OF EACH PART

INDOOR UNIT

NOTE
Recommended to replace the air cleaning filter after every 3 months for normal usage. Type number for this air cleaning filter is . Please use this number for ordering when you want to renew it.

MODEL NAME AND DIMENSIONS

MULTI-AIR CONDITIONER

With this multi-air conditioner, several indoor units can be connected to one outdoor unit to be driven. You can operate the required number of indoor units.

Combination of Operations:
When operation mode is selected:

• You cannot operate the indoor units in the following combinations.
• The indoor unit which is switched on first continues to operate, but other indoor units which is switched on later does not operate while the lamp lights.
• To re-start an indoor unit which was operated later, stop the indoor unit which was operated first or later and reset the type of operation, then perform operation again.

During automatic operation:
When heating operation is automatically selected for the first indoor unit, the next indoor unit will then start to heat. Also, if cooling or dehumidifying is automatically selected for the first indoor unit, the next indoor unit will also start to cool or dehumidify.

• Adjusting the Number of Indoor Units: Decrease the number of indoor units to be operated especially when it is very hot or cold or when you want to reach the present temperature quickly.
• Stopped Indoor Units:
  When an indoor unit is operated in the cooling, heating or dehumidifying mode in the room, the sound of refrigerant flow may be heard from
  a stopped indoor unit or a stopped indoor unit may become warm. This is because the indoor unit returns refrigerant to the outdoor unit to be ready for operation.

INDOOR UNIT INDICATORS

OPERATION INDICATOR

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.

Note
The recommended temperature range for safety testing 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

CIRCUIT BREAKER
When you do not use the room air conditioner, set the circuit breaker to “OFF”.

MEMO

THE IDEAL WAYS OF OPERATION

• Suitable Room Temperature
  • Warning Freezing temperature is bad for health and a waste of electric power.
• Install curtain or blinds
  • It is possible to reduce heat entering the room through windows.
• Ventilation
  • 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
• Effective Usage 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 filter will reduce the air volume and the cooling efficiency. To prevent from wasting electric energy, please clean the  filter every 2 weeks.
• 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.

FOR USER’S INFORMATION

• 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.

• 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 12W 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.

• 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.

MAINTENANCE

CAUTION

• Cleaning and maintenance must be carried out by qualified service personnel. Before the cleaning, stop operation and disconnect the power supply.
• Clean the filter at least once every one month. This helps save electricity cost.

CLEANING OF AIR FILTER

REMOVAL AND ATTACHMENT OF AIR FILTER
PROCEDURE

1. Remove the filter from indoor
   • Press the mark “PUSH” on the left and right sides of the suction grille.
   • Pull out the filter from the grille.
2. Remove dust from the filter using a vacuum cleaner.
   • If there is too much dust, use neutral detergent. After using neutral detergent, wash with clean water and dry in the shade.
3. 3 Install the filter. (Set it with “UP SIDE” mark

facing front.)

Slot the filter to suction grille and close as original state.

(Press the mark “PUSH” at the left and right sides of the suction grille to fix it securely.)

Note:
This model has an air cleaning filter. The cooling capacity is slightly weakened and the cooling speed becomes slower when the air cleaning filter is used. So, set the fan speed to “HIGH” when using it in this condition.

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 operate the air conditioner with the filter removed. Dust may enter the air conditioner and cause trouble.

CLEANING OF FRONT PANEL

• Wipe it with a soft dry cloth.
• When it is excessively dirty, wipe with soft cloth soaked in lukewarm water or neutral detergent. Then wipe thoroughly with a soft dry cloth.

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 (COOL), the temperature to 32°C and the fan speed to HI for about half a day on a one day, and dry the whole of the unit.
• Turn off the circuit breaker.

REGULAR INSPECTION

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

AFTER SALE SERVICE AND WARRANTY

WHEN ASKING FOR SERVICE, CHECK THE FOLLOWING POINTS.

Notes

• In quiet or stop 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.
• he 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 punctuation may occur. This is of no consequence.
  The conditions of the local Power Supply Companies are to be observed.

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