HITACHI RAK-DJ18PCAST Air Conditioner User Manual

OPERATION
MANUAL

–

ROOM AIR CONDITIONER

SPLIT TYPE       
DJ SERIES

MODELS

RAK-DJ18PCAST/RAC-DJ18PCAST
RAK-DJ24PCAST/RAC-DJ24PCAST

INSTRUCTION MANUAL

INDOOR UNIT
RAK-DJ18PCAST
RAK-DJ24PCAST

OUTDOOR UNIT

RAC-DJ18PCAST            RAC-DJ24PCAST

Access the full version of the User Operation Manual by scanning the code.

https://docs.hitachiaircon.com/RAK-DJ-PCAST/RAC-DJ-PCAST

Cooling & Heating

< H1171: (A) >

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.

  Indicates the instructions that must be followed.
  The sign in the figure indicates prohibition.

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 the Operation Instructions should be read carefully.

CAUTION

| This symbol shows that a service personnel should be handling this equipment with reference to the Installation Manual.

CAUTION

| This symbol shows that there is information included in the Operation Manual and/or Installation Manual

• Please keep this manual after reading.

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.

• 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.

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 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.

• 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

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 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 fatal accident.

• During thunder storm, 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.

CAUTION|

• 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.

• 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.

• 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 is not intended for use by persons (including children) who are physically handicapped sensory or mental or lack of experience and knowledge. Unless supervised or instructed on the use of electrical appliances by persons responsible for their safety.

NAMES AND FUNCTIONS OF EACH PART

INDOOR UNIT

1. Pre-filter
   To prevent dust from coming into the indoor unit.
   (Refer page 9)

2. Front panel
   (Refer page 10)

3. Indoor unit indicators
   Light indicator showing the operating condition.
   (Refer page 5)

4. Horizontal deflector, Vertical deflector
   (Air Outlet)

5. Remote controller
   Send out operation signal to the indoor unit. So as to operate the whole unit.

OUTDOOR UNIT

RAC-DJ18PCAST

1. Drain pipe
   Condensed water drain to outside.

2. Connecting cord and insulation pipe for piping

3. Air inlet (Back, Left side)

4. Air outlet

RAC-DJ24PCAST

1. Drain pipe
   Condensed water drain to outside.

2. Connecting cord and insulation pipe for piping

3. Air inlet (Back, Left side)

4. Air outlet

MODEL NAME AND DIMENSIONS

MODEL

| WIDTH (mm)| HEIGHT (mm)| DEPTH (mm)
---|---|---|---
RAK-DJ18PCAST, RAK-DJ24PCAST| 950| 294|

230

RAC-DJ18PCAST

| 658| 530| 275
RAC-DJ24PCAST| 850| 650|

298

INDOOR UNIT INDICATIONS

1. Operation Lamp (Yellow)
   This lamp lights during operation.

2. Timer Lamp (Orange)
   This lamp lights when the timer is working.

3. Wi-Fi Lamp (Blue)
   Optional

4. Clean Function Lamp (Green)
   This lamp uses for FrostWash, Mold Guard, Filter Sign.

5. 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.

CAUTION

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

If the power stays on and the unit is not operated, power is slightly consumed in the control circuit. The power is saved by turning off the power switch (or the circuit breaker when the power is supplied from the outdoor unit).

NAMES AND FUNCTIONS OF REMOTE CONTROLLER

• This remote controller controls the operation and timer setting of the room air conditioner. The operating range of the remote controller from the indoor unit is 7m. If indoor lighting is used, the range may be shorter.

1. Signal Transmission

2. Invalid Operation Sign
   Shown at invalid setting or operation

3. Transmission Sign
   The transmission sign blinks when a signal has been sent.

4. On/Off Button
   Press this button to start operation.
   Press it again to stop operation.

5. FAN SPEED Button
   Select the fan speed.

6. Powerful Button

7. SILENT Button

8. TEMPERATURE Button
   Room temperature setting.
   Value will change quicker when you keep pressing.

9. RESET Button

10. UP/DOWN Button
    Controls the angle of the horizontal air deflector.

11. Left/Right Button

12. Power SAFE Button

13. Off Timer Button
    Select the turn OFF time.

14. On Timer Button
    Select the turn ON time.

15. Refresh Button

16. Filter Sign Reset Button

17. FrostWash Button

18. GoodSleep Button

19. Mode Selector Button
    Use this button to select the operation mode. Every time you press this button, the mode will change from (Cool) ➞ (Dry) ➞ (Fan) ➞ (A.Cir) cyclically.

20. Off Mode Sign

Precautions for Use

• Do not put the remote controller under direct sunlight and high temperature.
• Do not drop it on the floor, and protect it from water.
• If you press the FUNCTION button during operation, the air conditioner may stop for about 3 minutes for protection before you can start it again.

INFORMATION

Capabilities

CAUTION
Do not use a stove or any other high temperature devices in proximity to the indoor unit.

PROHIBITION

Cooling and Dehumidifying Capabilities

• If the heat present in a room exceeds the unit’s cooling capacity (for example, if there are many people in the room or other heating appliances are used), the preset room temperature may not be reached.

Refrigerant Information

• For the refrigerant charge information, please refer to the outdoor unit installation manual or specification label.

THE IDEAL WAYS OF OPERATION

Suitable Room Temperature

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

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.

Install curtain or blinds

It is possible to reduce heat entering the room through windows.

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 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 1m away from electrical products.

1. Inverter-type fluorescent lamp.
2. To prevent interference, place at least 1m away.

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 (Accessories) to the filter frame.

• Attach the air purifying filters to the C-case to the designated position.
• The cooling capacity is slightly weakened and the cooling speed becomes slower when the air purifying filters are used.
• The air purifying filters are not washable. It is recommended to use vacuum to clean. It can be used for 1 year. When you want to renew it, please ask your sales agent.

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.

1. Air purifying filter

2. C-case

3. Backside of Air Filter

4. Claw

5. Hook

6. Filter Frame

7. Air Filter

8. guide

9. insert the hook to the hole

( 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

  CAUTION

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

• Gently lift and remove the air purifying filters from the air purifying filter frame.

( 2 ) Vacuum dust from the Pre-filter and air purifying 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 )

• Re-insert the air purifying filter to the filter frame. 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.

1. guide
2. insert the hook to the hole

  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.

2. 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

1. Move
2. Arm
3. Push

• When the front panel is fully opened with both hands, push the right arm to the outside to release it, and while closing the front panel slightly, pull it out forward.

Attaching the Front Panel

1. Insert
2. Arm
3. Shaft
4. Step

• 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.

WIRING ARRANGEMENT

  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.

FROSTWASH OPERATION

FrostWash Operation does not start| It does not wash when outside temperature is less than about 21°C or more than 43°C.
When “FrostWash” is done by operating a remote controller, it does not wash when the room temperature is less than about 21°C or more than about 32°C.
---|---
When 60 minutes after the end of “FrostWash”, “FrostWash” is not operated for product protection.
Noise occurred during FrostWash operation| It is the sound that the internal machine is inflated and contracted by the temperature change and the fi n of the heat exchanger is frozen and thawed
(Clean Function Lamp) blinks| Repeat for 1 second on and 1 second off for 10 seconds
Because “FrostWash” can not work when operating the “FrostWash” with remote controller.

• The air conditioner is operating 
• Outside air temperature, room temperature and room humidity are not suitable for “FrostWash” 
• It has not been over 60 minutes since the end of “FrostWash”

Repeat for 4 seconds on and 1 second off for 15 seconds
Because FrostWash has not been done for a long time.
➞ Operate the remote controller to operate “FrostWash”.

Mold Guard Operation

Mold Guard operation does not start| If the air conditioner has operated in cooling and drying mode, including auto mode, for less than 10 minutes, the Mold Guard operation will not start even if the air conditioner is in off mode.
If operation of the air conditioner is stop by OFF Timer or GoodSleep Timer, the Mold Guard will not operate.
If ON Timer is set and on time is within about 2 hours, the Mold-Guard will not operate.
---|---
During Mold Guard| (Clean Function Lamp) on the indoor unit lights up during Mold Guard operation. If Mold Guard operation stop at middle point, FrostWash and Filter sign indicator will turn off.
Notes| The horizontal deflector remain open. Room temperature or humidity may rise. Depending on situation, Mold Guard will operate with Fan Mode.
When there would be the window near indoor unit, the water might condense on the window during Mold Guard. If necessary, to cancel Mold Guard.
When after FrostWash operation, the water inside the indoor unit evaporates and depending on the room conditions, may emitted as steam. But this is not a malfunction. If necessary, to cancel Mold-Guard.

• The following phenomena do not indicate unit failure.

Hissing or fizzy sounds| Refrigerant flow noise in the pipe or valve sound generated when flow rate is adjusted.
---|---
Squeaking noise| Noise generated when the unit expands or contracts due to temperature changes.
Rustling noise| Noise generated with the indoor unit fan’s rpm changing such as operation start times.
Clicking noise| Noise of the motorized valve when the unit is switched on.
Perking noise| Noise of the ventilation fan sucking in air present in the drain hose and blowing out dehumidifying water that had accumulated in the condensed water collector. For details, consult your sales agent.
Changing operation noise| Operation noise changes due to power variations according to room temperature changes.
Mist emission| Mist is generated as the air within the room is suddenly cooled by conditioned air.
Odors| Caused as the smells and particles of smoke, food, cosmetics, etc. present in room air become attached the unit and blown off into the room again.
Does not reach the temperature setting| Actual room temperature may deviate slightly from the remote controller’s temperature setting depending on the number of people in the room, indoor or outdoor conditions.

REGULAR INSPECTION

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

1

| | Is the earth line disconnected or broken?
---|---|---

2

| | Is the mounting frame seriously affected by rust and is the outdoor unit tilted or unstable?

3

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

If the unit still fails to operate normally after performing the above inspections, turn the circuit breaker off and contact your sales agent immediately.

Contact your sales agent immediately if the following phenomena should occur

• The circuit breaker switches off or the fuse blows frequently.
• The switch operation is not stable.
• Foreign matter or water accidentally enters the unit interior.
• The power cord gets excessively hot or its insulation is torn or stripped.
• TIMER lamp on the indoor unit display blinks.
  (As the nature of the failure can be identified by the blinking cycle, check the blinking cycle before turning off the circuit breaker.)

AFTER SALE SERVICE AND WARRANTY

WHEN ASKING FOR SERVICE, CHECK THE FOLLOWING POINTS

CONDITION

|

CHECK THE FOLLOWING POINTS

---|---
 

1. If the remote controller is not transmitting a signal.

(Remote controller display is dim or blank.)

|

• Do the batteries need replacement? 
• Is the polarity of the inserted batteries correct?

1. When it does not cool well

|

• 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 pre-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”?

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.

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 21°C (70°F).
  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|

46

Wet bulb °C

| 15|

26

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