HITACHI RAD-50RPE Split Type Air Conditioner Owner’s Manual

HITACHI RAD-50RPE Split Type Air Conditioner

Instruction manual

To obtain the best performance and ensure years of trouble-free use, please read this instruction manual completely.

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 that, 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 indicates the following meanings.
• Please keep this manual after reading it.

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 the earth line.
• Do not place the earth line near water or gas pipes, lightning-conductor, or the earth line of the telephone. Improper installation of the earth line may cause electric shock.
• 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 installing, moving, or repairing.
• Using other refrigerants may cause trouble or damage to the unit, and personal injury.
• 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 flammable gas. The outdoor unit may catch fire if flammable gas leaks around it.

CAUTION

• Please ensure a smooth flow of water when installing the drain hose.
• Do not install the indoor unit in a machine shop or kitchen where vapor from oil or its mist flows to the indoor unit.
• The oil will deposit on the heat exchanger, thereby reducing the indoor unit performance, and may deform and in the worst case, break the plastic parts of the indoor unit.

PRECAUTIONS DURING SHIFTING OR MAINTENANCE

• Should an abnormal situation arise (like a burning smell), please stop operating the unit and turn off the circuit breaker.
• Contact your agent. Fault, short circuit, or fire may occur if you continue to operate the unit under abnormal situations.
• 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 centers.
• If the air conditioner is not cool, one possible cause could be due to refrigerant leakage, so consult your dealer.
• The refrigerant gas used in the air conditioner is harmless. But if refrigerant gas leaks into the room, harmful products are generated when in contact with fire from appliances such as a stove heater.
• When there is refrigerant gas accumulation in the room, immediately stop the air conditioner. Open the windows for ventilation and contact the vour agent.

PRECAUTIONS DURING OPERATION

• Avoid an extended period of direct airflow 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 a fatal accident.
• During a thunderstorm, disconnect 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.
• The product shall be operated under the manufacturer’s specification and not for any other intended use.
• Do not attempt to operate the unit with wet hands, this could cause a fatal accident.
• When operating the unit with burning pieces of equipment, regularly ventilate the room to avoid oxygen insufficiency.
• Do not direct the cool air coming out from the air-conditioner panel to face the household heating apparatus as this may affect the working of apparatus such as the electric kettle, oven, etc.
• Please ensure that the outdoor mounting frame is always stable, firm, and without defects. 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 a short circuit.
• Do not use any aerosol or hair sprays near the indoor unit. This chemical can adhere on heat exchanger fin 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 a water container (like a vase) on the indoor unit to avoid water dripping into the unit. Dripping water will damage the insulator inside the unit and cause a short circuit.
• Do not place plants directly under the airflow 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 deflector facing down or moving automatically for a long time, water will condense on the air deflector and drip down occasionally.
• This will wet your furniture. Therefore, do not operate under such conditions 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 equipment, etc.), the preset room temperature cannot be achieved.
• This appliance can be used by children aged from & years and above and persons with reduced physical, sensory, or mental capabilities or lack of experience and knowledge if they have been given supervision or instruction concerning the use of the appliance in a safe way and understand the hazards involved.
• Children shall not play with the appliance. Cleaning and user maintenance shall not be done by children without supervision.

NAMES AND FUNCTIONS OF EACH PART

INDOOR UNIT

MODEL NAME AND DIMENSIONS

MULTI-AIR CONDITIONER

Several indoor units can be connected to one outdoor unit. You can operate only one unit or several units according to your needs.

Combination of Operations:

• When the operation mode is selected.
• You cannot operate the indoor units in the following combinations.

During automatic operation:

• When a 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 start to cool or dehumidify.
• The indoor unit which is turned on first continues to operate. Other indoor units that are turned on later go into standby mode and the operation lamp lights.
• To operate the indoor units turned on later, set the operation mode as same as the indoor unit turned on first.

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 the refrigerant to the outdoor unit to be ready for operation.

OPERATING RANGE

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| -10| 46| -15| 21
Wet bulb °C| | 26| | 15

CIRCUIT BREAKER

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

HOW TO USE THE AIR CONDITIONER EFFECTIVELY

1. An average room temperature setting is probably the best for you as well as being economical
   • Excessive cooling or heating is not recommended for health reasons. High electricity bills may also result.
   • Close the curtains or blinds to prevent heat from flowing into or escaping the room as well as to make more effective use of electricity.
2. At intervals, the doors and windows should be opened to let fresh air in
   • CAUTION Make sure the room is ventilated when operating the air conditioner at the same time as other heating appliances.
3. Using the timer is recommended before going to sleep or going out
4. The following must never be used for cleaning the indoor and outdoor units
   • Benzine, thinner, and scrub can damage plastic surfaces or coaling.
   • Hot water above 40°C can shrink the filter and deform plastic parts.
5. Do not block the air intake and air outlet
   • Do not block the air outlets and intakes of the indoor and outdoor units with curtains or other obstacles that could degrade air conditioner performance and cause unit failure.

THE IDEAL WAYS OF OPERATION

Suitable Room Temperature

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

Install curtains 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 Pre-Filter

Dusty air filters will reduce the air volume and the cooling efficiency. To prevent wasting electric energy, please clean the filter every 2 weeks.

Please Adjust the Suitable Temperature For the Baby And Children

Please pay attention to the room temperature and airflow direction when operating the unit for babies, children, and old folks who have difficulty in movement.

FOR USERS 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 types of equipment, 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, please switch off the power from the mains. If the power from mains remains “ON”, the indoor unit still consumes about 3W 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 1 m away from electrical products.

MAINTENANCE

• WARNING Before cleaning, stop unit operation with the remote controller and turn off the circuit breaker.
• CAUTION Do not expose the unit to water as it may cause an electric shock.
• For cleaning inside the air conditioner, consult your sales agent.
• Avoid using detergent when cleaning the heat exchanger of the indoor unit. Unit failure may result.
• When cleaning the heat exchanger with a vacuum cleaner, make sure to wear gloves so as not to injure vour hands on the heat exchanger fine.

PRE- FILTER

• Clean the Pre-filter, as it removes dust inside the room. In case the Pre-filter is full of dust, the airflow will decrease and the cooling capacity will be reduced. Further, noise may occur. Be sure to clean the Pre-filter following the procedure below.

PROCEDURE

1. Pull the filter toward the center until it detaches from the holders. Then take it out from holders (refer to diagram).
2. Remove dust from the filter using a vacuum cleaner. If there is too much dust, wipe the filter with a wet cloth or sponge. Allow the filter to dry in the shade.
3. Install the filters.
   • Gently insert back the filter into the holders.

CAUTION

• Do not wash with hot water at more than 40°C. The filter may shrink.
• Do not operate the air conditioner with the filter removed. Dust may enter the air conditioner and cause trouble.

REGULAR INSPECTION

PLEASE CHECK THE FOLLOWING POINTS BY QUALIFIED SERVICE PERSONNEL EITHER EVERY HALF-YEARLY OR YEARLY. CONTACT YOUR SALES AGENT OR SERVICE SHOP.

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.
• Slight flowing noise of refrigerant in the refrigerating cycle.
• Slight rubbing noise from the fan casing which is cooled and then gradually warmed as the 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 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, and date of installation. Please also inform him regarding the fault.
• The power supply shall be connected at the rated voltage, otherwise, the unit will be broken or cannot reach the specified capacity.

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.

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