Hitachi RAK-18NHA2, RAK-25NHA2, RAK-50NHA2, RAK-35NHA2 Instruction Manual

SPLIT TYPE AIR CONDITIONER

INDOOR UNIT

MODEL

RAK-18NHA2 RAK-25NHA2 RAK-35NHA2 RAK-50NHA2

INDOOR UNIT

RAK-18NHA2 RAK-25NHA2 RAK-35NHA2 RAK-50NHA2

– 1 –

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.

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

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 ﬁ re may occur if you reconstruct the unit by yourself.

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

leakage, short circuit or ﬁ re may occur if you install the unit by yourself.

WARNING

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.

● Be sure to use the speciﬁ 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 ﬂ ammable gas. The outdoor unit may catch

ﬁ re if ﬂ ammable gas leaks around it.

● Please ensure smooth ﬂ 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 ﬂ 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

A R N

I N G

off the circuit breaker. Contact your agent. Fault, short circuit or ﬁ 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 ﬁ re.

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

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.

The sign in the ﬁ gure indicates prohibition.

PRECAUTIONS DURING OPERATION

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

A R N

N G

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

●

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 ﬁ 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.

– 2 –

PRECAUTIONS DURING OPERATION

● The product shall be operated under the manufacturer speciﬁ 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 insufﬁ 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, ﬁ 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 ﬁ n and blocked the evaporation water ﬂ ow

C A U T

O N

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 ﬂ 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 deﬂ ector facing down or moving automatically for a long period of time, water will condense on the air deﬂ 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 inﬁ 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.

– 3 –

NAMES AND FUNCTIONS OF EACH PART

INDOOR UNIT

Pre-ﬁ lter

To prevent dust from coming into the indoor unit. (Refer page 35)

Front panel

Indoor unit indicators

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

Horizontal deﬂ ector (Air Outlet)

Remote controller

Send out operation signal to the indoor unit. So as to operate the whole unit. (Refer page 8-9)

●

Vertical deﬂ ector

NOTE

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

MODEL NAME AND DIMENSIONS

DEPTH (mm)

230

RAK-18NHA2/RAK-25NHA2/RAK-35NHA2/RAK-50NHA2

WIDTH (mm)MODEL HEIGHT (mm)

790

300

– 4 –

INDOOR UNIT INDICATORS

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 ﬁ 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 ﬂ 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.

OPERATION INDICATOR

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.

– 5 –

PREPARATION BEFORE OPERATION

■ To install the batteries

1. Slide the cover to take it off.

2. Install two dry batteries AAA.LR03 (alkaline). The direction of the batteries should match the

marks in the case.

3. Replace the cover at its original position.

■ To ﬁ x the remote controller holder to the wall

1. Choose a place from where the signals can reach the unit.

2. Fix the remote controller holder to a wall, a pillar or similar location with the provided screws.

3. Place the remote controller in the remote controller holder.

Remote controller

NOTE

Notes on batteries

● When replacing the batteries, use batteries of the same

type, and replace both old batteries together.

● When the system is not used for a long time, take the

batteries out.

● The batteries will last for approximately 1 year. However, if

the remote controller display begins to fade and degradation of reception performance occurs within a year, replace both batteries with new size AAA.LR03 (alkaline).

● The attached batteries are provided for the initial use of

the system.

The usable period of the batteries may be short depending

on the manufactured date of the air conditioner.

Notes on the remote controller

● Never expose the remote controller to direct sunlight.

● Dust on the signal transmitter or receiver will reduce the

sensitivity. Wipe off dust with soft cloth.

● Signal communication may be disabled if an electronic-

starter-type ﬂ uorescent lamp (such as inverter-type lamps) is in the room. Consult the shop if that is the case.

● If the remote controller signals happen to operate another

appliance, move that appliance to somewhere else, or consult the service shop.

● When the remote controller is not in use, please close the

slide cover to prevent failure.

Remote

Screws

controller holder

– 6 –

PREPARATION BEFORE OPERATION

1. Press (RESET) button when ﬁ rst time setting.

■ To set calendar and clock

"Year" blinks.

2. Press

3. Press blink.

4. Press month.

5. Press

6. Press time.

7. Press

Calendar and clock are set.

To modify the calendar and clock, press button. Then follow steps 1 to 7.

Calendar and clock need to be set again after changing batteries.

(TIME) button to set the current year.

(CLOCK) button. "Day" and "Month"

(TIME) button to set the current day and

(CLOCK) button. "CLOCK" blinks.

(TIME) button to set the clock to the current

(CLOCK) button.

(CLOCK)

After changing the batteries,

1. Press (RESET) button.

2. Direct remote controller towards indoor unit and press

(INFO) button.

3. The calendar and clock from indoor unit will be transmitted.

■ Calendar and clock will not be transmitted from indoor unit when the following occurs:

● When there is a power failure.

● When breaker is OFF by user (unit is not in STANDBY

MODE).

NOTE

Note on setting the calendar and clock.

● If the calendar and clock are not set, the ON-timer, OFF-timer and Weekly Timer cannot be set.

● If the calendar and clock are not set correctly, the ON-timer, OFF-timer and Weekly Timer will not

operate correctly.

● When the ON-timer, OFF-timer and Weekly Timer are set, the calendar and clock cannot be changed.

If there is a need to change the calendar and clock, ON-timer, OFF-timer and Weekly Timer need to be cancelled.

– 7 –

NAMES AND FUNCTIONS OF REMOTE CONTROLLER

REMOTE CONTROLLER

● This controls the operation of the indoor unit. The range of control is about 7 meters. If indoor lighting is

controlled electronically, the range of control may be shorter.

This unit can be ﬁ xed on a wall using the ﬁ xture provided. Before ﬁ xing it, make sure the indoor unit can

be controlled from the remote controller.

● Handle the remote controller with care. Dropping it or getting it wet may compromise its signal transmission

capability.

● After new batteries are inserted into the remote controller, the unit will initially require approximately 10

seconds to respond to commands and operate.

● When remote controller is not in use for about 3 minutes during OFF condition, indicated by on the

display, the LCD will turn off.

● During clock setting, the LCD will turn off about 10 minutes later if the remote controller is not in use.

● When pressing any button, the LCD will turn on.

● The LCD will not turn off during TIMER setting.

Signal Transmitting/Receiving Window

Point this window towards the indoor unit when controlling it.

Sensor

A temperature sensor inside the remote controller senses ambient temperature around the remotecontroller.

Display

This indicates the room temperature selected, current time, timer status, function and airﬂ ow rate selected.

ROOM TEMPERATURE setting Buttons

Press these buttons to set the room temperature.

Press the [ ] button to raise the room temperature.

Press the [

] button to lower the room

temperature.

Keep pressing and the value will change more quickly.

Transmission sign

The transmission sign lights up when a signal is sent.

START/STOP button

Press this button to start operation. Press it again to stop operation.

FAN SPEED selector Button

This determines the fan speed.

Every time you press this button,

the airﬂ ow rate will change from

(AUTO) ➞ (HIGH) ➞

(MED) ➞ (LOW) ➞

(SILENT) (This button allows

selection of optimal or preferred fan

speed for each operation mode).

ECO Button

Use this button to set the ECO mode. (

p. 17)

– 8 –

NAMES AND FUNCTIONS OF REMOTE CONTROLLER

POWERFUL Button

Use this button to set the POWERFUL mode. ( p. 15)

INFORMATION Button

p. 29)

(

ONE TOUCH CLEAN Button

p. 19)

(

LEAVE HOME Button

( p. 18)

ECO SLEEP TIMER Button

Use this button to set the ECO sleep timer. (

p. 21)

ON / OFF TIMER setting Buttons

(

p. 20)

MODE selector Button

Use this button to select the operating mode. Every time you press this button, the mode will change from (HEAT) ➞

(AUTO) ➞

(DEHUMIDIFY) ➞ (COOL) and ➞ (FAN) cyclically.

SILENT Button

Use this button to set the SILENT mode. ( p. 16)

AUTO SWING (Vertical) Button

Controls the angle of the horizontal air deﬂ ector. (

p. 14)

AUTO SWING (Horizontal) Button

Controls the angle of the vertical air deﬂ ector. (

p. 14)

WEEKLY TIMER setting Buttons

(

p. 23)

MODE SELECTOR AUTO HEAT DEHUMIDIFY COOL FAN

FAN SPEED AUTO SILENT LOW MED HIGH

START / STOP

ECO

FAN

POWERFUL

SILENT

INFO

SLEEP TIMER

AUTO SWING (VERTICAL)

AUTO SWING (HORIZONTAL)

LEAVE HOME

CLEAN

DAY

PROGRAM NO.

ON / OFF TIMER

TIME

DELETE

COPY / PASTE

CANCEL

SEND

CLOCK

Precautions for Use

●

Do not put the remote controller in the following places.

●

Under direct sunlight.

● In the vicinity of a heater.

●

Handle the remote controller carefully. Do not drop it on the ﬂ oor, and protect it from water.

●

Once the outdoor unit stops, it will not restart for about 3 minutes (unless you turn the power switch

off and on or unplug the power cord and plug it in again).

This is to protect the device and does not indicate a failure.

●

If you press the MODE selector button during operation, the device may stop for about 3 minutes for

protection.

– 9 –

VARIOUS FUNCTIONS

■ Auto Restart Control

● If there is a power failure, operation will be automatically restarted when the power is resumed with previous operation

mode and airﬂ ow direction.

(As the operation is not stopped by remote controller.)

● If you intend not to continue the operation when the power is resumed, switch off the power supply.

When you switch on the circuit breaker, the operation will be automatically restarted with previous operation mode

and airﬂ ow direction.

Note: 1. If you do not require Auto Restart Control, please consult your sales agent.

2. Auto Restart Control is not available when Timer or Sleep Timer mode is set.

AUTOMATIC OPERATION

The device will automatically determine the mode of operation, HEAT or COOL depending on the current room temperature. The selected mode of operation will change when the room temperature varies. However, the mode of operation will not change when indoor unit is connected to multi type outdoor unit.

Press the MODE selector button so that the display indicates the (AUTO) mode of operation.

● When AUTO has been selected, the device will automatically

determine the mode of operation, HEAT or COOL depending on the current room temperature. However the mode of operation will not change when indoor unit is connected to multi type outdoor unit.

● If the mode automatically selected by the unit is not satisfactory, manually change the mode setting (HEAT, DEHUMIDIFY, COOL or FAN).

Set the desired FAN SPEED with the (FAN SPEED) button (the display indicates the setting).

(AUTO) (HIGH) (MED)

START

STOP

■ As the settings are stored in the memory of the remote controller, you

Set the desired room temperature with the TEMPERATURE buttons (the display indicates the setting). The temperature setting and the actual room temperature may vary depending on conditions.

Press the Operation starts with a beep. Press the button again to stop operation.

only have to press the

(START/STOP) button.

(SILENT) (LOW)

(START/STOP) button next time.

Press the (FAN SPEED) button to select AUTO, HIGH, MED, LOW or SILENT.

– 10 –

HEATING OPERATION

● Use the device for heating when the outdoor temperature is under 21°C.

When it is too warm (over 21°C), the heating function may not work in order to protect the device.

● In order to maintain reliability of the device, please use this device when outdoor temperature is above

–15°C.

Press the MODE selector button so that the display indicates

(HEAT).

Set the desired FAN SPEED with the (FAN SPEED) button (the display indicates the setting).

START

STOP

■ As the settings are stored in the memory of the remote controller, you only have to press the

■ During AUTO fan, the fan speed automatically changes as below:

● When the difference between room temperature and setting temperature

● After room temperature reaches the preset temperature, fan speed

(AUTO) (HIGH) (MED)

Set the desired room temperature with the TEMPERATURE buttons (the display indicates the setting).

The temperature setting and the actual room temperature may vary depending on conditions.

Press the a beep. Press the button again to stop operation.

is large, fan starts to run at HI speed.

will be changed to lower speed to obtain optimum room temperature condition for natural healthy heating.

(START/STOP) button. Heating operation starts with

(SILENT) (LOW)

(START/STOP) button next time.

Defrosting

Defrosting will be performed about once an hour when frost forms on the heat exchange of the outdoor unit, for 5~10 minutes each time. During defrosting operation, the operation lamp blinks in a cycle of 3 seconds on and 0.5 second off. The maximum time for defrosting is 20 minutes. However, if the indoor unit is connected to multi type outdoor unit, the maximum time for defrosting is 15 minutes. (If the piping length used is longer than usual, frost is likely to form.)

– 11 –

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.

Press the MODE selector button so that the display indicates

(DEHUMIDIFY). The fan speed is set at LOW. Press (FAN SPEED) button to select SILENT or LOW fan speed.

Set the desired room temperature with the ROOM TEMPERATURE setting buttons (the display indicates the setting).

START

STOP

■ As the settings are stored in the memory of the remote controller, you

Press the (START/STOP) button. Dehumidifying operation starts with a beep. Press the button again to stop operation.

only have to press the

The range of 20-26˚C is recommended as the room temperature for dehumidifying.

(START/STOP) button next time.

■ Dehumidifying Function

● When the room temperature is higher than the temperature setting: The device will dehumidify the room,

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 preset room temperature may not be reached depending on the number of people present in the room

or other room conditions.

– 12 –

+ 26 hidden pages

Hitachi RAK-18NHA2, RAK-25NHA2, RAK-50NHA2, RAK-35NHA2 Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual