HITACHI RAK-DJ25PCAT Split Type Air Conditioner Instruction Manual

Split Type Air Conditioner
Indoor Unit
MODEL
RAK-DJ25PCAT
RAK-DJ35PCAT
Instruction Manual

RAK-DJ25PCAT Split Type Air Conditioner

Instruction manual
To obtain the best performance and ensure years of trouble free use, please read this instruction manual completely.
This room air conditioner is only for residential usage.
Do not use for preservation of foods, animals, plants, precision machines, art, medicine or such.

SAFETY PRECAUTION

Please read the “Safety Precaution” carefully before operating the unit to ensure correct usage of the unit.
This appliance is filled with R32.

• 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.)

Make sure to connect earth line.
Indicates the instructions that must be followed.
This sign in the figure indicates prohibition.

PRECAUTIONS DURING INSTALLATION

WARNING

• Do not reconstruct the unit.
  Water leakage, fault, short circuit or fi re may occur if you reconstruct the unit by yourself.
  PROHIBITION

• 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 or fire.
  CONNECT EARTH LINE

• Be sure to use the specif ied piping set for R32. Otherwise, this may result in. 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, 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 the unit near a location where there is flammable gas.

• The outdoor unit may catch fire if flammable gas leaks around it.

• Please ensure smooth fl ow of water when installing the drain hose.

• Make sure that a single phase 220V-240V power source is used.
  PROHIBITION
  The use of other power sources may cause electrical components to overheat and lead to fire.

PRECAUTIONS DURING SHIFTING OR MAINTENANCE

WARNING

• Should abnormal situation arise (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 fi re may occur if you remove and reinstall the unit yourself improperly.

PRECAUTIONS DURING OPERATION

WARNING

• Avoid an extended period of direct airflow for your health.
  PROHIBITION

• Do not put objects like thin rods into the panel of blower and suction side because the high-speed fan inside may cause danger.

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

• During thunder storm, disconnect the plug top 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.
  PROHIBITION

PRECAUTIONS DURING OPERATION

CAUTION

• This room air conditioner is only for residential usage.
  Do not use for preservation of foods, animals, plants, precision machines, art, medicine or such.

• The product shall be operated under the manufacturer specif ication and not for any other intended use.
  PROHIBITION
  

• Do not attempt to operate the unit with wet hands, this could cause fatal accident.
  **DON’T WET**

• When operating the unit with burning equipments, regularly ventilate the room to avoid oxygen insuff iciency.
  PROHIBITION

• 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, film and without defect. If not, the outdoor unit may collapse and cause danger.

• PROHIBITION   Do not wash the unit with water or place a water container such as a vase on the indoor unit.
  Electrical leakage could be present and cause electric shock.

• **** Do not place plants or animals directly under the airf low as it is bad for the plants or animals.

• Be sure to stop the operation by using the remote controller 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 be operated for a long period.

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

• When operating the unit with the door and windows opened, (the room humidity is always above 80%) and with the air def lector 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.
  PROHIBITION

• If the amount of heat in the room is above the cooling capability of the unit (for example: more people entering the room, using heating equipments and etc.), the preset room temperature cannot be achieved.
  PROHIBITION

• Indoor unit cleaning must be performed by authorized personnel only. Consult your sales agent.
  Using a commercially available detergent or similar can damage the plastic parts or clog the drain pipe, causing water to drip with potential electric shock hazard.
  PROHIBITION

• Do not spray pesticides, flammable sprays, deodorants, antibacterial agents, etc. on indoor units. because it may cause fire, deformation, refrigerant leakage, or water leakage.

• Do not touch the air outlet, bottom surface and aluminium f in of the outdoor unit.
  You may get hurt.

• Do not touch the refrigerant pipe and connecting valve.
  Burns may result.

• This appliance is not to be used by children or persons with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction. Children must be supervised not to play with the appliance.

Operation Range

Names and Functions of Each Part

Indoor Unit

Model Name and Dimensions

Indoor Unit Indications

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).

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.

Operate Air Conditioner with Smartphone

Built-in airCloud Home module
airCloud Home is a cloud-based solution for remotely controlling your Hitachi air conditioning system via smart phone.
You can operate the air conditioner from outside the home with your smartphone and check the operating status.
airCloud Home app dedicated server

Send the operation from the smartphone to the air conditioner.
In addition, we send status from air conditioner to customer’s smartphone.

What You Should Confirm When Using the Service

Internet environment at home

• In order to use the service, FTTH (optical fiber) ADSL / CATV (cable TV) and other Internet services, a broadband line capable of communication is required. Not available on dial-up lines.
• For details on Internet connection, contact your provider or carrier. Please check your contract.
• Internet communication charges are the responsibility of the customer.

Smartphone

• iOS (iPhone, etc.) 10.0 / Android 8.0 or later (as of December 2021)
• Make sure that you can connect to the router with wireless LAN.
• Tablets are not guaranteed to work.

Wireless LAN router
(Hereinafter router)

• Please use a router that supports the 2.4GHz band.

• For security, be sure to use a router that can set the encryption method WPA2 or WPA (either TKIP or AES).
  We recommend the WPA2 (AES) encryption method. For the setting procedure, refer to the instruction manual of the router.

• Routers that support only WEP cannot be used.

• Mobile routers are not guaranteed to work.

• To confirm the OS version, check on your smart phone, or contact your smart phone manufacturer.

Initial Settings

Please install the airCloud Home app on your smartphone

1. Search for the airCloud Home app
   • For Android models: Open Google Play.
   Android is a trademark and registered trademark of Google LLC.
   • For iOS models (iPhone): Open the App Store.
   iPhone is a trademark and registered trademark of Apple Inc.

2. Please install according to the screen
   ・In order to use the dedicated app, you need to read and agree to the Terms of Service.
   ・The dedicated application is free of charge, but to download the application, additional communication fees may be charged based on the customer’s contract for Internet data.
   ・The names and icons of the dedicated apps are as of September 2021. It may be changed by updating the application.

Notes:

• The first registered user becomes group administrator by default and manage other users and also set access rights for other users.
• When using with multiple users, the registered user should invite other users to register.

Notes on Wireless LAN

WARNING

• Do not enable remote features near those with a cardiac pacemaker or defibrillator
  If it is too close, radio waves may affect the operation of pacemakers and other devices.

Use frequency band
In the frequency band used by this air conditioner, in addition to industrial, scientific and medical equipment such as microwave ovens, private radio stations for identification of mobile objects (radio stations that require a license) and specified Low power radio stations (radio stations that do not require a license) and amateur radio stations (radio stations that require a license) are in operation.

1. Before using this air conditioner, make sure that local radio stations for identification of mobile objects, specified low-power radio stations and amateur radio stations are not operating nearby.
2. If any harmful radio interference occurs from the air conditioner to the mobile station identification radio station, immediately stop using the radio wave and contact the local Johnson Controls-Hitachi Air Conditioning (Hereinafter JCH) technical support team to consult about measures for avoidance.
3. In addition, if you have any problems such as harmful radio interference from the air conditioner to the specified low power radio station for identifying the moving object or amateur radio station. Please contact the local JCH technical support team.

How to use frequency
Modulation system is DSSS and OFDM system

It means that the entire band from 2.400 GHz to 2.4835 GHz can be used and the band of the mobile identification device can be avoided.

Equipment certification
This air conditioner has a built-in wireless device that has been approved for construction design based on the Radio Law, so a license for a wireless station is not required. However, the following acts are prohibited by the Radio Law.

• Disassemble / modify wireless device.
• Remove the main unit nameplate.
• Erase the indication on the nameplate of the main unit.

Security measures

• Since wireless LAN transmits and receives using radio waves, there is a risk of unauthorized access. Please take security measures for the wireless LAN router (hereinafter, router) to ensure data security.
  Please note that JCH do not take any responsibility if a problem occurs without implementing security measures.

• We recommend that you set a password (encryption key) for the router of at least 8 characters and no more than 63 characters.
  (Refer to the instruction manual of the router for the limitation of the number of characters.) When the router password (encryption key) is changed, please change the same password on the airCloud Home app also. About firmware

• This air conditioner has the function of connecting to our server through the Internet and automatically updating its firmware to the latest version. During the update, wireless communication may be interrupted and communication may be interrupted or can be slow.

Usage restrictions

Please note the following restrictions on use.
JCH will not be liable for any failure to observe the restrictions or for any incidental damage resulting from the use or inability to use the air conditioner.

• Do not connect to wireless networks for which you do not have usage rights. Unauthorized wireless networks (SSID) that you do not have permission to use may be displayed during automatic search of the wireless network environment.
  SSID is a name to identify a specific network in wireless LAN. If this SSID matches on both devices, communication is possible.

• Do not analyze or modify the firmware.

• Do not use where magnetic fields, static electricity or radio interference may occur.

• Microwave oven during cooking

• Bluetooth compatible device

• Other wireless LAN devices (wireless WEB cameras, PC devices, etc.) except the router (wireless
  LAN router) that communicates with this air conditioner.If used near the following devices, communication may be interrupted or the speed may decrease.

• If there are metallic objects or walls made of steel or reinforced concrete between the unit and the router, the communication signal may be jammed, leading to loss of communication thus preventing the control of the unit by App.

• For technical support, please contact your installer or local distributor”.
  Website link: www.hitachiaircon.com

Information about Using Wirless LAN

• The air conditioner can be operated from a place that is no t directly visible. Therefore, for example, a situation may occur where a person in the room turns ON while another person turns OFF from outside. Especially when infants, children, the elderly, the sick, or the physically handicapped are indoors, use it when a person who can manage it is nearby. In addition, before using, please understand the condition of the room before operating.

• Your smartphone and air conditioner communicate data via our server using the Internet. Therefore, due to the condition of the communication line of your mobile phone company or provider, the setting of your router, or the stop of service due to maintenance of the airCloudHome server, data communication may not be possible, and the system may not or delay operate.

• After connecting the air conditioner to the router, you can p erform data communication. To use, you will incur the broadband internet charges and your smartphone network provider charges as per the customer contract.

• If the air conditioner is not operated for a long time or if the home internet network has been comple tely shut down, it is advisable to initialize the airCloud Home module and reconnect the same.

• Please do not inform other people about the SSID / KEY of this air conditioner.

• Johnson Controls Air Conditioning guarantees repair of this air conditioner under certain conditions. However, we do not guarantee that stored data is lost or damaged.

• This air conditioner stores network setting information. When disposing of this air conditioner, initialize the builtin airCloud Home module (Refer to page12 Restore
  Factory Setting).

• Customers are responsible for resolving any deficiencies in the Internet and wireless environment at home.

• If you operate the air conditioner using the app, some of th e set functions may be canceled.

SSID & KEY Label Paste
SSID & KEY label details of Air conditioner’s built-in airCloud Home module is pasted here for your reference.
Please keep it safe for future requirements during pairing process and please write down the installation location (like living room, bed room, etc.) on the label.
The AC type is “2” that is for models with a built-in airCloud Home module.

About Software License
The software installed in this air conditioner is composed of multiple independent software modules, and each software module has the copyright of JCH and a third party.
This air conditioner also contains software modules developed or created by us, but these software and accompanying documents have proprietary rights and intellectual property rights of JCH.
These are protected by copyright law and other laws.

Initial Setting of App

Installation of App
Go to Google Play or the Apple Store (depending on your smartphone) and download the “airCloud Home” Application.
※ Please read and agree to “the Terms of Use” on the App.
※ The App is free. Communication charges will be incurred for download and operation as per the local cell phone provider.
※ Android is a trademark and registered by Google LLC.
※ iPhone is a trademark and registered by Apple Inc.
※ QR code is a trademark and registered by DENSO WAVE Inc.

Registration on App

1. Click “Create Account”.
2. Enter your name and click “Continue”.
3. Enter your mobile number and password (or click “E-mail” tab, and enter your E-mail address and password), read the “terms and conditions” and check on the box, click “Continue”.
4. Enter received verification code you received and click “Continue”.
5. Click “Auto-Detect My Location” or Enter address details manually, and click “Finish”.
6. The account has been created successfully.

Note:
The first registered user can manage all the users and set access rights as a group owner. Group owner can invite others to register.

Air Conditioner Registration and Router Connection

Make sure that the air conditioner ready to be Powered on, then follow the steps below to add your air conditioner device to the App.

1. Click “Add Air Conditioner” on the top screen after registration and login your App.

2. Scan QR code on the bundled SSID & KEY label in this user manual or by lifting the front panel of your air conditioner.

3. If the SSID shown on the App is your home router, enter your home router password, click “Next”. Otherwise, click “Change Wi-Fi Network”, select your home router enter password and click “Next”.

4. Switch ON your air conditioner now. Once your air conditioner is switched on or by restoring the factory settings by remote control, the air conditioner would be set into pairing mode for 10 minutes. Wi-Fi LED on air conditioner’s panel (see diagram in status indicator section) will blink for 3 times repeatedly showing air conditioner is in pairing mode. Wi-Fi LED keeps blinking till communication with Wi-Fi router is succeeded.
   When the airCloud Home module reset operation is performed through the remote control. the pairing mode can be entered without restarting the air conditioner.

5. Click “Change Wi-Fi Network”, select the Wi-Fi access point of the Built-in airCloud Home module with SSID printed on the bundled SSID&KEY Label, input password (the KEY). Click right arrow icon on the screen top to continue for connecting your smart phone with the Adapter.

6. Waiting for the built-in airCloud Home module to connect to your home router. When communication is established, Wi-Fi LED on panel will be continuously ON after blinking.

7. Waiting for the Smartphone to connect with your home network. If your Smartphone is connected to another wireless network then click on Change Wireless Network & select home network.

8. Please assign a name to your registered air conditioner. If you assign a custom name to your air conditioner, it will not be compatible with your smart speaker (integrated with Alexa or Google Assistant), so we recommend that you select a name from the pre-defined list.

9. Your air conditioner has been successfully configured.

1. If communication cannot succeed within 10 minutes, please follow the instructions of the App to complete the pairing process again.
2. If a user in the group has already registered some air conditioning units, the other users in the same group can also control the unit.
3. If the air conditioning is not configured with router, at power on unit enters into pairing mode every time for 10 minutes with Wi-Fi indication blinking for 3 times.
4. If the air conditioning is already configured with router, and router detection is available then at power on, unit will skip the pairing mode & try to connect to router.
5. Please enter the SSID name of the air-conditioner to proceed with the pairing process if unable to scan QR code.

Initialization of the Built-in airCloud Home Module

Reset the internal settings (restore the factory settings) by remote controller.
Please note that the configuration will be cleared and pairing procedure will be required to do again to use the built-in airCloud Home module.

1. Press Mode key and ON Timer key simultaneously, pointing the remote controller towards the air conditioning unit.
2. Make sure Wi-Fi LED on Indoor unit flashes 4 times repeatedly for about 20 seconds (LED is turning off between 2 sequences of 20 seconds).
3. Restart the unit (turn power OFF during 1 minute, then turn power ON again) and check that the Wi-Fi LED is blinking 3 times.

If Wi-Fi LED is indeed flashing 3 times, pairing mode is well activated and factory settings have well been restored.

Status Indicator (LED Indicator may light up while the air conditioner is turned off)

detected.
•Air conditioner is not plugged in.
•Built-in airCloud Home module and the air conditioner is not connected.
LED ON| •The connection between the Built-in airCloud Home module and the router is completed.
•The operation can be conducted through smartphone.
LED flashes 3 times| Waiting to connect to the Wi-Fi router using AP mode.
LED flashes 4 times| Restoring factory setting procedure has started.
LED flashes 5 times| Communication error between air conditioner & Built-in airCloud Home module (Error detection time: approx 24 mins.)
LED flashes with 4sec ON/1 sec OFF| Router connection error.
LED flashes with 4sec ON/3sec OFF| Cloud connection error. (Error detection time: approx 30 mins.)

Note:
Please try to power OFF/ON your air conditioner from mains switch when an error occurs.
*”Wi-Fi” is a trademark or registered trademark of the “Wi-Fi Alliance”.

Maintenance

CAUTION

• Ensure unit and power supply is switched off before cleaning.
• Avoid touching any metal parts directly and do not use wet hands.
• Cleaning shall be carried out by competent person and able to follow below instruction.

1. Air Filter
Please clean the filter once about every two weeks. By doing so, energy costs 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 with putting the filter on the guide. and insert the hook to the hole.
   • After attaching the filters, push the front panel at three arrow portions as shown in figure and close it. 

NOTE:
Air purifying filter to be inspected at least once a month or sooner depending on the usage of the air conditioner. If noticeable loading occurs on the unit, please clean it to avoid deterioration of its deodorizing function. For better performance, it is advisable to replace it every 1 year (subject to usage and application requirements).

CAUTION

• Do not wash with hot water at more than 40°C. The filter may shrink.
• Do not wash with pressing hard on the filter, bending too much or using a brush. The filter may break.
• 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.

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. Push the end of the right-side arm outward to release the tab.
2. Move the left-side arm outward to release the left tab, and then pull the panel towards you.

Attaching the Front Panel

1. Insert the shaft of the left arm along the step on the unit into the hole.
2. Securely insert the shaft of the right arm along the step on the unit into the hole.
3. Make sure that the front panel is securely attached, and then close the front panel.

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 (FAN) and the fan speed to Super High for about half a day on a fine day, and dry the whole of the unit.
• Switch off the power plug or turn off the circuit breaker.

Information

Capabilities

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 other heating appliances are used), the preset room temperature may not be reached.

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

REFRIGERANT INFORMATION

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

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

1| | WARNING| Check to see if the unit’s earth line has been connected correctly.
If the earth line is disconnected or faulty, unit failure or electric shock hazard
may result.
---|---|---|---
2| | WARNING| Check to see if the mounting frame has rusted excessively or if the outdoor unit
has tilted or become unstable.
It could collapse or fall, causing injury.

After Sales Service and Warranty

When Asking for Service, Check the Following Points.

If the remote controller is not transmitting a signal.
remote controller display is blank or LCD display restarts on pressing of any key and  there is no response from air conditioner unit.| • Do the batteries need replacement?
• Is the polarity of the inserted batteries correct?
When it does not operate.| • Is the fuse all right?
• Is the voltage extremely high or low?
• Is the circuit breaker “ON”?
• Is the power plug inserted?
• Do you have any power cut?
When it does not cool well.| • Is the air filter blocked with dust?
• Is the set temperature suitable?
• Have horizontal air deflectors been adjusted to their correct positions according to the operation mode selected?
• Are the air inlets or air outlets of indoor and outdoor units blocked?
• Is the fan speed “LOW”or “SILENT”?

FrostWash Operation

FrostWash Operation does not start| Is the total operation time of the air conditioner beyond default setting when the air-conditioner is operated for about 30 minutes and stopped?
---|---
The FrostWash be started that must to meet with the follow conditions.| | indoor FrostWash auto operation.
---|---
Accumulation time| Accumulated operating hours of the air
conditioner have exceeded about 42 hours
The room temperature| about 10-32°C
The humidity in the room| about 30-70%
The outside temperature| about 1-43°C
Does not change to non -automatic “FrostWash”?
Does it happen after “sleep” and “time off’?
→ Automatic “FrostWash” interval becomes longer. Please operate manual
“FrostWash” with remote controller.
Within 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 fin 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”.

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.
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.
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 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.

References

• Air Conditioning Systems | Hitachi Cooling & Heating

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