HITACHI RAS-NH18CLT Indoor Unit Split Type Air Conditioner Instruction Manual

RAS-NH18CLT Indoor Unit
Split Type Air Conditioner
Instruction Manual

RAS-NH18CLT Indoor Unit Split Type Air Conditioner

SPLIT TYPE AIR CONDITIONER
INDOOR UNIT/OUTDOOR UNIT
MODEL
RAS-NH18CLT / RAC-NH18CLT
RAS-NH24CLT / RAC-NH24CLT

Instruction manual
To obtain the best performance, 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 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.
  The sign in the figure indicates prohibition.
  Indicates the instructions that must be followed.

• Please keep this manual after reading.

EXPLANATION OF SYMBOLS DISPLAYED ON UNIT

WARNING This symbol shows that this equipment uses a flammable refrigerant.
If the refrigerant is leaked, together with an external ignition source, there is a possibility of ignition.
CAUTION This symbol shows that a service personnel should be handling this equipment with reference to the Installation Manual.
CAUTION This symbol shows that the Operation Instructions should be read carefully.
CAUTION This symbol shows that there is information included in the Operation Manual and/or Installation Manual

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 R32. Otherwise, this may result in broken copper pipes or faults.

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.

PRECAUTIONS DURING SHIFTING OR MAINTENANCE

WARNING

• 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 fire 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 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 your agent.

PRECAUTIONS DURING OPERATION

WARNING

•  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.
• The product shall be operated under the manufacturer specification and not for any other intended use.
• Do not attempt to operate the unit with wet hands, this could cause fatal accident.
• During thunder storm, disconnect and turn off the circuit breaker.
• 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 splash or direct water to the body of the unit when cleaning it as this may cause 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 water container (like vase) on the indoor unit to avoid water dripping into the unit. Dripping water will damage the insulator inside the unit and causes short­ circuit.
• Do not place plants directly under the air flow 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 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.
• This appliance can be used by children aged from 8 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 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 made by children without supervision.

NAMES AND FUNCTIONS OF EACH PART

INDOOR UNIT

OUTDOOR UNIT

(MODEL NAME AND DIMENSIONS)

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 automatic 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.

NAMES AND FUNCTIONS OF REMOTE CONTROL UNIT

REMOTE CONTROLLER
This controls the operation of the indoor unit. Signal range to reach indoor unit is about 7 meters.
If inverter lamp is used, the range of control may be shorter. This unit can be fixed on a wall using the fixture provided. Before fixing it, make sure the indoor unit can be controlled from the remote controller.

COOLING OPERATION

Use the device for cooling when the outdoor temperature is 21 – 43°C.
If indoors humidity is very high (over 80%), some dew may form on the air outlet grille of the indoor unit.

[NOTE]
HI fan speed mode selected
When unit has been operating for a long period of time and the difference between remote controller setting temperature and actual room temperature is continuously large, the fan speed may increase causing higher air blow sound.
During the time, cooling capacity will be maximized. If the air blow sound causes any discomfort, please select “AUTO” or other than “HI” fan speed.

SILENT OPERATION

NOTE:
Under SILENT mode operation and quiet environment, phenomena like flowing noise of refrigerant in the refrigerating cycle may occur, but this is normal for the operation.

DEHUMIDIFYING OPERATION

Use the device for dehumidifying when the room temperature is over 16°C.
When it is under 15°C, the dehumidifying function will not work.

■ Dehumidifying Function
When the room temperature is higher than the temperature setting: The device will dehumidify the room and reducing the room temperature to the preset level.
When the room temperature is lower than the temperature setting: Dehumidifying will be performed at the temperature setting slightly lower than the current room temperature, regardless of the temperature setting.
The function will stop (the indoor unit will stop emitting air) as soon as the room temperature becomes lower than the setting temperature. You might feel a bit colder in dehumidifying operation.

FAN OPERATION
In Fan operation mode the device is function as an air circulator.

■ FAN Function
During FAN operation, compressor does not run and there is no cooling operation with only indoor fan running.

ONE-TOUCH POWERFUL MODE

HOW TO SET THE AIR SLEEP TIMER

Air Sleep Timer: The device will continue working for the designated number of hours and then turn off.
Point the signal window of the remote controller toward the indoor unit, and press the AIR SLEEP TIMER button.
The timer information will be displayed on the remote controller.
The TIMER lamp lights with a beep from the indoor unit.
Explanation of the air sleep timer
The device will control the FAN SPEED and room temperature automatically so as to be quiet and good for people’s health.
You can set the sleep timer to turn off after 1,2,3 —» 9 or 10 hours. The FAN SPEED and room temperature will be controlled as shown below.
Operation with the air sleep timer

and the FAN SPEED will be set to LOWEST 1 hour after the setting of the air sleep timer.

HOW TO SET THE TIMER

■ ON Timer and OFF Timer are available.

ON Timer Reservation

ON TIME setting

• Select the ON TIMER by pressing the  (ON TIMER) Button.
• Setting time will change according to the below sequence.
• After the ON TIMER is set, the hour display will be counting down as time passes.

■ Operation will start for setting temperature at setting time.

AIR FLOW LOUVERS ADJUSTMENTS

Adjustment of the conditioned air in the upward and downward directions.
The horizontal air deflector is automatically set to the proper angle suitable for each operation. The deflector can be swung up and down continuously and also set to the desired angle using the ” (AUTO SWING)” button.

• If the “  (AUTO SWING)” button is pressed once, the horizontal air deflector swings up and down.
  If the button is pressed again, the deflector stops in its current position. Several seconds (about 6 seconds) may be required before the deflector starts to move.

• Use the horizontal air deflector within the adjusting range shown on the right.

• When the operation is stopped, the horizontal air deflector moves and stops at the position where the air outlet closes.
  CAUTION

• In “Cooling” operation, do not keep the horizontal air deflector swinging for a long time. Some dew may form on the horizontal air deflector and dew may drop.

Adjustment of the conditioned air to the left and right.
Hold the third vertical air deflector of each set of vertical air deflectors from right as shown in the figure and adjust the conditioned air to the left or right. WARNING
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 any cleaning or adjusting the deflectors, be sure to switch OFF the operation.

HOW TO EXCHANGE THE BATTERIES IN THE REMOTE CONTROLLER

When using the remote control, if there is no response from the air conditioner unit and or the remote control has fading and dim displays, the batteries in the remote control device need to be removed and replaced  with new ones

1. Remove the cover as shown in the figure and take out the old batteries.
2. Install the new batteries.
   The direction of the batteries should match the marks in the case.

CAUTION

1. Do not use new and old batteries, or different kinds of batteries together.
2. Take out the batteries when you do not use the remote controller for 2 or 3 months.
3. Use high quality and high performance AAA batteries to avoid short operating life and electrolyte leakages.
4. After batteries are replaced or when an operation is abnormal, press the reset button with a pen point.

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 or SLEEP 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 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 2.5W 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.

ATTACHING THE AIR PURIFYING FILTERS

1. Open the front panel
   • Pull up the front panel by holding it at both sides with both hands.

2. Remove the Pre-filter
   • Push upward to release the claws and pull out the Pre-filter.

3. Attaching the air purifying filters
   • Attach the air purifying filters to the frame by gently compress its both sides and release after insertion into Pre-filter frame. CAUTION
   Do not bend the air purifying filter as it may cause damage to the structure. Please do not smell direct from source of filter.

4. Attach the Pre-filters
   • Attach the Pre-filters by ensuring that the surface written “FRONT” is facing front.
   • After attaching the Pre-filters, push the front panel at three arrow portions as shown in figure and close it.

NOTE

• In case of removing the air purifying filters, please follow the above procedures.
• The cooling capacity is slightly weakened and the cooling speed becomes slower when the air purifying filters are used. So, set the fan speed to “HIGH” when using it in this condition.
• Air purifying filters are not washable. It is recommended to use vacuum to clean it. It can be use for 1 year time. Type number for this air purifying filter is . Please use this number for ordering when you want to renew it.
• Do not use detergent on the air purifying filter as some detergent may deteriorate the air purifying filter electrostatic performance.

MAINTENANCE

CAUTIONI
Before cleaning, stop operation and switch off the power supply.

1. PRE-FILTER

Clean the Pre-filter, as it removes dust inside the room. In case the Pre- 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 Pre-filter following the procedure below.
PROCEDURE

1. Open the front panel and remove the Pre-filter
2. Vacuum dust from the Pre-filter using vacuum cleaner. If there is too much dust, rinse under running tap water and gently brush it with soft bristle brush. Allow filters to dry in shade.
3. • Set the Pre-filter with “FRONT” mark facing front, and slot them into the original state.
   • After attaching the Pre-filters, push the front panel at three arrow portions as shown in figure and close it.

CAUTION

• Do not wash with hot water at more than 40°C. The Pre-filters may shrink.
• When washing it, shake off moisture completely and dry it in the shade; do not expose it directly to the sun. The Pre-filters may shrink.
• Do not use detergent on the Pre-filter as some detergent may deteriorate the Pre-filter electrostatic performance.

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

• When the front panel is fully opened with both hands, push the right arm to the inside to release it, and while closing the front panel slightly, put it out forward.
  Attaching the Front Panel

• Move the projections of the left and right arms into the Flanges in the unit and securely insert them into the holes.
  CAUTION

• Never use hot water (above 40°C), benzine, gasoline, acid, thinner or a brush, because they will damage the plastic surface and the coating.

CAUTION

• 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.

• A circuit breaker should be installed depending on the mounting site of the unit. Without a circuit breaker, the danger of electric shock exists.

IMPORTANT
The wires in this mains lead are coloured in accordance with the following code:
Green-and-yellow: Earth
Blue : Neutral
Brown : Live
As the colours of the wires in the mains lead of this appliance may not correspond with the coloured markings identifying the terminals in your plug, proceed as follows:
The wire which is coloured green-and-yellow must be connected to the terminal in the plug which is marked with the letter E or by the earth symbol@ or coloured green or green-and-yellow.
The wire which is coloured blue must be connected to the terminal which is marked with the letter N or coloured black.
The wire which is coloured brown must be connected to the terminal which is marked with the letter L or coloured red.
NOTE
If the supply cord is damaged, it must be replaced by the special cord obtainable at authorized service/parts centers.
CAUTION
Cleaning and maintenance must be carried out only by qualified service personnel. Before cleaning, stop operation and switch off the power supply.

REGULAR INSPECTION

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

tilted or unstable?
3| | Is the plug of power line firmly plugged into the socket?
(Please ensure no loose contact between them).

AFTER SALE SERVICE AND WARRANTY
WHEN ASKING FOR SERVICE, CHECK THE FOLLOWING POINTS

• Is the voltage extremely high or low?
• Is the circuit breaker “ON”?
| • Was the air filter cleaned?
• Does sunlight fall directly on the outdoor unit?
• Is the air flow of the outdoor unit obstructed?
• Are the doors or windows opened, or is there any source of heat in the room?
• Is the set temperature suitable?

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.

• 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 for the model of your unit, serial 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.

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.
Note
• Avoid to use the room air conditioner for cooling operation when the outside temperature is below 21C (70F).
The recommended maximum and minimum operating temperatures of the hot and cold sides should be as below:

| | Minimum| Maximum
---|---|---|---
Indoor| Dry bulb °C| 21| 32
Wet bulb °C| 15| 23
Outdoor| Dry bulb °C| 21| 43
Wet bulb °C| 15| 26

MEMO

Documents / Resources

| HITACHI RAS-NH18CLT Indoor Unit Split Type Air Conditioner [pdf] Instruction Manual
RAS-NH18CLT, RAS-NH18CLT Indoor Unit Split Type Air Conditioner, Indoor Unit Split Type Air Conditioner, Split Type Air Conditioner, Air Conditioner, Conditioner
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