HITACHI RAK-18PEA-RAC-18WEA Split Type Air Conditioner Instruction Manual

HITACHI RAK-18PEA-RAC-18WEA Split Type Air Conditioner

Product Information

Specifications

• Type: Split Type Air Conditioner
• Models:
  • RAK-18PEA/RAC-18WEA
  • RAK-25PEA/RAC-25WEA
  • RAK-35PEA/RAC-35WEA
  • RAK-50PEA/RAC-50WEA
• Refrigerant: HFC R410A

Product Usage Instructions

Installation
Follow the installation instructions provided in the manual for both the indoor and outdoor units. Ensure proper positioning and secure installation.

Operation:
Use the remote control to set the desired temperature and mode (cooling, heating, fan). The unit will start operating based on your settings.

Maintenance
Regularly clean or replace the filters as instructed in the manual to ensure efficient operation. Keep the outdoor unit free from obstructions for proper airflow.

Troubleshooting
If you encounter any issues such as abnormal noises or odors, refer to the troubleshooting section of the manual. Check for error codes and follow the recommended steps.

FAQ (Frequently Asked Questions)

• Q: Why is the actual room temperature different from the set temperature on the remote control?
  A: The difference in room temperature could be due to various factors like the number of occupants in the room and external conditions. It is normal for slight variations to occur.

• Q: What should I do if the unit is not reaching the set temperature?
  A: Check for any error codes or flashing lights on the unit. Refer to the manual to understand the possible causes and solutions for this issue.

SPLIT TYPE AIR CONDITIONER
INDOOR UNIT/OUTDOOR UNIT

MODEL
RAK-18PEA/RAC-18WEA
RAK-25PEA/RAC-25WEA
RAK-35PEA/RAC-35WEA
RAK-50PEA/RAC-50WEA

Instruction manual
To obtain the best performance and ensure years of trouble free use, 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 signs indicate the following meanings. (The following are examples of signs.)

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

NAMES AND FUNCTIONS OF EACH PART

INDOOR UNIT

OUTDOOR UNIT

MODEL NAME AND DIMENSIONS

RAK-18PEA, RAK-25PEA

RAK-35PEA, RAK-50PEA

| 780| 280| 218
RAC-18WEA, RAC-25WEA| 700| 505| 258
RAC-35WEA| 750| 548| 288
RAC-50WEA| 792| 600| 299

INDOOR UNIT INDICATIONS

CAUTION
Turn off the circuit breaker or pull out the power plug 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 controls the operation function and timer setting of the room air conditioner. The range of control is about 7 meters. If indoor lighting is controlled electronically, the range of control may be shorter.

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.

MANUAL OPERATION [Heating • Dehumidify • Cooling]
Please use under below condition when you want to set the function mode, room temperature and fan speed manually.

OPERATION MODE SELECTION
Every time you press the button, the mode will change as the below. ROOM TEMPERATURE SETTING The cooling operation does not start if the temperature setting is higher than the current room temperature.

FAN SPEED SETTING
Every time you press the button, fan speed will change as below sequence.

TIMER RESERVATION

• ON Timer and OFF Timer are available. Timer Reservation
• Operation stop at setting time
• The operation will start at the setting temperature at the setting time. (The starting time may vary depending on the room temperature and the set temperature).

POWERFUL OPERATION
By pressing button during AUTO, HEATING, DEHUMIDIFYING, COOLING or FAN operation, the air conditioner performs at maximum power. During POWERFUL operation, cooler or warmer air will be blown out from indoor unit for COOLING or HEATING operation respectively.

NOTE

• When ECO mode, or LEAVE HOME mode is selected, POWERFUL operation is cancelled. During POWERFUL operation, capacity of the air conditioner will not increase
  • if the air conditioner is already running at maximum capacity.
  • just before defrost operation (when the air conditioner is running in HEATING operation). After auto restart, POWERFUL operation is cancelled and previous operation shall start.

LEAVE HOME(LH) OPERATION
Prevent the room temperature from falling too much by setting temperature at 10 deg automatically when no one is at home.

NOTE
During Leave Home operation, fan speed and horizontal air deflector position cannot be changed.

ECO OPERATION

Energy saving operation by changing set temperature and by limiting the maximum power consumption value.

NOTE

• In case the power consumption is already low,ECO operation will not reduce the power consumption.
• By pressing (POWERFUL) button, ECO operation is cancelled.
• After auto restart, ECO operation is cancelled and previous operation mode shall start.

ADJUSTING THE AIRFLOW DIRECTION

1. Adjust the airflow upward and downward.
   According to operation, the horizontal air deflector is automatically set to the proper angle suitable for each operation. The deflector can be swings up and down and also set to the desired angle using the button. (AUTO SWING) ”

   • 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.
   • The adjusting range of the horizontal air deflector is 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 some dew may drop from it.

2. Adjust the airflow to left and right

   • Hold the vertical air deflector as shown on the right and adjust the airflow to left and right.

HOW TO EXCHANGE THE BATTERIES IN THE REMOTE CONTROLLER

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.

MAINTENANCE

CAUTION
Cleaning and maintenance must be carried out only by qualified service personal. Before cleaning, stop operation and switch off the power supply.

AIR FILTER
Please clean the filter once about every two weeks. By doing so, the power rates are saved. In case the air 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 filter following the procedure below.

PROCEDURE

1. Open the front panel carefully and remove the filter.
2. Vacuum dust from the air filter using vacuum cleaner. If there is too much dust, wash the filter with a detergent and rinse it thoroughly. After that, dry it in the shade.
3. Set the filter with “FRONT” mark facing front, and slot them into the original state.
   • After attaching the 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 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.
• Don’t operate the unit without filter. Fault may occur if you continue.

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 .

• 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.

• Move the shafts of the left and right arms into the steps in the unit and securely insert them into the holes.

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.

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 ne day, and dry the whole of the unit.
Switch off the power plug or turn off the circuit breaker.

INFORMATION

CAPABILITIES
Heating Capability

• This room air conditioner utilizes a heat pump system that absorbs exterior heat and brings it into a room to be heated. As the ambient temperature gets lower, heating capability will also lower. In such a situation, the inverter work to increase compressor rpm to keep the unit’s heating capability from decreasing. If the unit’s heating performance is still unsatisfactory, other heating appliances should be used PROHIBITIONto the indoor unit. to augment this unit’s performance.
• The air conditioner is designed to heat an entire room so that it may take some time before you feel warm.
• Timer operation is recommended for effective preheating ahead of the desired time.

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

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.

REGULAR INSPECTION

PLEASE CHECK THE FOLLOWING POINTS EVERY EITHER HALF YEARLY OR YEARLY. CONTACT YOUR SALES AGENT SHOULD YOU NEED ANY HELP.

AFTER SALES SERVICE AND WARRANTY

WHEN ASKING FOR SERVICE, CHECK THE FOLLOWING POINTS.

The following phenomena do not indicate unit failure.

|
---|---
During heating, the operation| The unit is preparing to blow warm air. Please wait.
indicator blinks and air blow stops|
| The outdoor unit is defrosting. Please wait.
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.
Steam emitted from the outdoor unit| Water generated during defrosting operation evaporates and steam is emitted.
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.
The outdoor unit continues to operate even if operation is stopped.| Defrosting is underway (as the heating operation is stopped, the microcomputer checks frost accumulated in the outdoor unit and instructs the unit to perform automatic defrosting if necessary).
The OPERATION lamp is blinking.| Shows preheating or defrosting operation is underway.

As the protective circuit or preheat sensor operates when unit operation is stopped during preheating and then restarted, or when operation mode is switched from cooling to heating, the lamp continues to blink.

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.

If the unit still fails to operate normally after performing the above inspections, turn the circuit breaker off, or pull the power plug out, 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.

Notes
In quiet operation or stopping the running, 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 please clean the air filter and the evaporator regularly 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.

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.

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