Hitachi RAK-18QPA, RAK-35QPA, RAK-25QPA, RAK-50QPA Users Manual

SPLIT TYPE AIR CONDITIONER

INDOOR UNIT

MODEL

RAK-18QPA
RAK-25QPA
RAK-35QPA
RAK-50QPA

INDOOR UNIT

RAK-18QPA
RAK-25QPA
RAK-35QPA
RAK-50QPA

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 “

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.

● Please keep this manual after reading.

PRECAUTIONS DURING INSTALLATION

● Do not reconstruct the unit.

Water leakage, fault, short circuit or Þ re may occur if you reconstruct the unit by yourself.

● Please ask your sales agent or qualiÞ ed technician for the installation of your unit. Water

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WARNING

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CAUTION

leakage, short circuit or Þ re 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 speciÞ ed piping set for R410A. Otherwise, this may result in broken

copper pipes or faults.

● 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 ß ammable gas. The outdoor unit may catch

Þ re if ß ammable gas leaks around it.

● Please ensure smooth ß ow 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 ß ows 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 abnormal situation arises (like burning smell), please stop operating the unit and turn

off the circuit breaker. Contact your agent. Fault, short circuit or Þ re may occur if you continue

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to operate the unit under abnormal situation.

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● Please contact your agent for maintenance. Improper self maintenance may cause electric

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shock and Þ re.

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● Please contact your agent if you need to remove and reinstall the unit. Electric shock or Þ re

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may occur if you remove and reinstall the unit yourself improperly.

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● If the supply cord is damaged, it must be replaced by the special cord obtainable at

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authorized service/parts centers.

Warning” and “!Caution”. The “Warning” section contains matters which, if not

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The sign in the Þ gure indicates prohibition.

PRECAUTIONS DURING OPERATION

● Avoid an extended period of direct air ß ow for your health.

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● Do not use any conductor as fuse wire, this could cause fatal accident.

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●

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.

● Do not insert a Þ nger, 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.

●

During thunder storm, disconnect and turn off the circuit breaker.

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PRECAUTIONS DURING OPERATION

● The product shall be operated under the manufacturer speciÞ cation 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 insufÞ ciency.

● 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, Þ rm 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 Þ n and blocked the evaporation water ß ow
to drain pan. The water will drop on tangential fan and cause water splashing

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out from indoor unit.

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● Please switch off the unit and turn off the circuit breaker during cleaning,

the high-speed fan inside the unit may cause danger.

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● Turn off the circuit breaker if the unit is not to be operated for a long period.

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● Do not climb on the outdoor unit or put objects on it.

ENGLISH

● 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 ß ow 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 deß ector facing down or moving automatically for a long period of time,
water will condense on the air deß ector 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 inÞ rm 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.

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NAMES AND FUNCTIONS OF EACH PART

INDOOR UNIT

Pre-Þ lter

To prevent dust from coming into the indoor unit.
(Refer page 10)

Front panel

Indoor unit indicators

Light indicator showing the operating condition.
(Refer page 5)

●

Horizontal deß ector
(Air Outlet)

Remote controller

Send out operation signal to the indoor unit. So as
to operate the whole unit.
(Refer Remote control manual)

NOTE

● Air purifying Þ lters 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 Þ lter is <SPX-CFH22>. Please use this number
for ordering when you want to replace it.

Vertical deß ector

MODEL NAME AND DIMENSIONS

RAK-18QPA/RAK-25QPA/RAK-35QPA/RAK-50QPA

WIDTH (mm)MODEL HEIGHT (mm)

790

– 4 –

300

DEPTH (mm)

230

INDOOR UNIT INDICATORS

OPERATION INDICATOR

FILTER LAMP

When the device is operated for a total of about 200
hours, the FILTER lamp lights to indicate that it is time
to clean the Þ lter. The lamp goes out when the “
(AUTO SWING)” button is pressed while the device is on
“STANDBY MODE”.

OPERATION LAMP

This lamp lights during operation.
The OPERATION LAMP ß ashes in the following cases
during heating.

(1) During preheating

For about 2–3 minutes after starting up.

(2) During defrosting

Defrosting will be performed about once every one

hour when frost forms on the heat exchanger of the
outdoor unit, for 5–10 minutes each time.

TIMER LAMP

This lamp lights when the timer is working.

ENGLISH

TEMPORARY SWITCH

Use this switch to start and stop when the remote controller does not work.

● 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.

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