Hitachi Rai-25qpb User manual

CEILING CASSETTE TYPE AIR CONDITIONER

INDOOR UNIT

RAI-25QPB

RAI-35QPB

RAI-50QPB

INDOOR UNIT

MODEL

RAI-25QPB

RAI-35QPB

RAI-50QPB

RAI-25QPB-UM-EN1 1RAI-25QPB-UM-EN1 1 12/23/14 5:09 PM12/23/14 5:09 PM

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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.

PRECAUTIONS DURING OPERATION

● 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.

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 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.

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

WARNING

PRECAUTIONS DURING INSTALLATION

●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.

●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.

●Please ensure smooth ﬂow of water when installing the drain hose.

CAUTION

RAI-25QPB-UM-EN2 2RAI-25QPB-UM-EN2 2 12/23/14 5:10 PM12/23/14 5:10 PM

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PRECAUTIONS DURING OPERATION

●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 insufﬁciency.

●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.

●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 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.

●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.

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

●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.

●The product shall be operated under the manufacturer speciﬁcation and

not for any other intended use.

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INDOOR UNIT

NAMES AND FUNCTIONS OF EACH PART

PRE-FILTER

To prevent dust from coming into the indoor unit.

(Refer page 10)

INDOOR UNIT INDICATORS

Light indicator showing the operating condition.

(Refer page 6)

SUCTION GRILL (AIR INLET)

HORIZONTAL DEFLECTOR (AIR OUTLET)

REMOTE CONTROL

Send out operation signal to the indoor unit. So as to

operate the whole unit.

(Refer Remote Controller Manual)

●Recommended to replace the air cleaning ﬁlter after every 3 months for normal usage. Type number for

this air cleaning ﬁlter is <SPX-NTW1>. Please use this number for ordering when you want to renew it.

NOTE

WIDTH (mm)

580

MODEL

RAI-25QPB, 35QPB, 50QPB

HEIGHT (mm)

285

DEPTH (mm)

580

MODEL NAME AND DIMENSIONS

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MULTI-AIR CONDITIONER

When operation mode is selected:

Combination of Operations:

●You cannot operate the indoor units in the

following combinations.

●The indoor unit which is turned on ﬁrst continues

to operate. Other indoor units which 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.

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.

OPERATING RANGE

Operation mode

Outdoor temperature

Cooling / Dehumidifying

–10 to 43°C

Heating

–15 to 21°C

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

according to your needs.

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.

One unit

Heating

Other unit

Cooling

Dehumidifying

Fan

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INDOOR UNIT INDICATORS

OPERATION INDICATOR

OPERATION LAMP

This lamp lights during operation.

The OPERATION LAMP ﬂashes 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 an 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.

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 ﬁlter. The lamp goes out when

the “ (AUTO SWING)” button is pressed

while the device is on “STANDBY MODE”.

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.

TEMPORARY

SWITCH

Temporary Switch

Press

Non-

conducted

stick

about 5.5mm

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MEMO

......................................................................................................................................................................................

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”.

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Suitable Room Temperature Install curtain or blinds

Ventilation Effective Usage Of Timer

Do Not Forget To Clean The Pre-Filter

Please Adjust Suitable Temperature

For Baby And Children

!Warning

Freezing temperature

is bad for health and a

waste of electric power.

It is possible

to reduce

heat entering

the room

through

windows.

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.

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 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.

!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.

THE IDEAL WAYS OF OPERATION

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FOR USER’S INFORMATION

The Air Conditioner And The Heat Source In The Room

Not Operating For A Long Time

When Lightning Occurs

!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.

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 (depends on

outdoor unit connected) in the operation control

circuit even if it is in “OFF” mode.

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.

Inverter-type

ﬂuorescent

lamp.

To prevent

interference,

place at least

1m away.

OFF

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– 10 –

MAINTENANCE

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.

1. CLEANING OF PRE-FILTER

CAUTION

1Remove 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.

2Remove 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.

3Install 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.)

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.

REMOVAL AND ATTACHMENT OF PRE-FILTER

PROCEDURE

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REGULAR INSPECTION

PLEASE CHECK THE FOLLOWING POINTS EITHER EVERY HALF YEARLY OR YEARLY.

CONTACT YOUR SALES AGENT SHOULD YOU NEED ANY HELP.

Is the earth line disconnected or broken?

WARNING

Coming off or breakage of grounding wire may cause malfunction

or electrical shock.

Is the mounting frame seriously affected by rust and is the outdoor

unit tilted or unstable?

WARNING

Outdoor unit may fall or drop if there is extreme rust on mounting

frame or outdoor unit is unstably installed. This may cause injury.

2. 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.

3. 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 ﬁne day, and dry the whole of the unit.

●Turn off the circuit breaker.

Is the plug of power line ﬁrmly plugged into the socket?

(Please ensure no loose contact between them).

Air

Blow

Conﬁrm

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– 12 –

AFTER SALE SERVICE AND WARRANTY

WHEN ASKING FOR SERVICE, CHECK THE FOLLOWING POINTS.

When it does not operate

● Is the fuse all right?

● Is the voltage extremely high or low?

● Is the circuit breaker “ON”?

● Is the setting of operation mode different from other indoor units?

● Is the air ﬁlter blocked with dust?

● 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?

● Are the air inlets or air outlets of indoor and outdoor units

blocked?

● Is the fan speed “LOW” or “SILENT”?

CONDITION CHECK THE FOLLOWING POINTS

Notes

● In quiet or stop operation, the following phenomena may occassionally 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 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.

When it does not cool well

When it does not hot well

If the remote controller is

not transmitting a signal. ● Do the batteries need replacement?

● Is the polarity of the inserted batteries correct?

Remote controller

display is dim or blank.)

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 ﬂuctuation

may occur. This is of no consequence.

The conditions of the local Power Supply Companies are to be observed.

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MUISTIINPANOT

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MUISTIINPANOT

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