Hitachi Split Type Air Conditioner - Indoor Unit

Safety Precautions

Please read the safety instructions carefully before operating the appliance to ensure correct usage. Pay special attention to "Warning" and "Caution" notices. "Warning" indicates points that, if not strictly observed, can lead to death or serious injury. "Caution" indicates points that can lead to serious consequences if not observed correctly. Please observe all instructions to ensure your safety.

Pictograms have the following meanings:

• Verification that the earth wire is connected. ?
• The symbol shown in the figure indicates prohibition. ?
• Indicates instructions to follow.
• Please keep this manual after reading.

Precautions during Installation

• Do not modify the appliance. Modification may result in water leakage, malfunction, short circuit, or fire.
• Please have your appliance installed by a Hitachi representative or a qualified technician. Self-installation may result in water leakage, short circuit, or fire.
• Please use a grounding line. Do not install the grounding line near water or gas pipes, lightning rods, or telephone grounding lines. Improper installation may cause electric shock or fire.
• Use the specified piping for R32 refrigerant. Failure to do so may result in rupture of copper pipes or malfunction.
• A circuit breaker must be provided according to the installation location. Without a circuit breaker, there is a risk of electric shock.
• Do not install the unit near a flammable gas source. If gas leaks nearby, the outdoor unit could catch fire.
• Ensure the drain hose is installed correctly for proper water drainage.
• Use a 220V - 230V single-phase power supply. Using a different power supply may cause overheating of electrical components and fire.

Precautions during Moving or Maintenance

• If an abnormal situation occurs (e.g., burning smell), stop using the unit and turn off the circuit breaker. Contact your installer. Continued use in abnormal conditions may cause breakdown, short circuit, or fire.
• Please contact your dealer or distributor for maintenance. Improper maintenance may cause electric shock or fire.
• Please contact your dealer or distributor for removal and reinstallation. Improper removal and reinstallation may cause electric shock or fire.

Precautions during Use

• For your health, avoid prolonged exposure to direct airflow.
• Do not insert objects like thin rods into the fan outlet or suction side, as the high-speed fan inside can be dangerous.
• Do not use conductors like fuse wire, as this could cause a fatal accident.
• In case of thunderstorms, unplug the power cord and turn off the circuit breaker.
• Do not place aerosol cans or other combustibles within one meter of air outlets or the indoor and outdoor units. Internal pressure of aerosol cans may increase due to hot air, potentially causing an explosion.
• Do not use flammable products (hair spray, pesticide, etc.) near the unit. This may cause electric shock, fire, or false detection by an optional gas detector.
• The appliance must be used according to the manufacturer's indications and not for other purposes.
• Do not handle the appliance with wet hands, as this may cause a fatal accident.
• When using the appliance with combustion equipment, ventilate the room regularly to prevent oxygen deficiency.
• Do not direct the cool airflow from the air conditioner onto heating appliances, as this may degrade their efficiency (e.g., electric kettles, ovens).
• Ensure the outdoor mounting bracket is stable, firm, and resistant. Otherwise, the outdoor unit may fall and cause danger.
• Do not wash the unit with water or place water-filled containers (like vases) on the indoor unit. This may cause electric shock.
• Do not place plants directly under the airflow, as this may be detrimental to them.
• Turn off the appliance using the remote control and switch off the circuit breaker for cleaning. The high-speed fan inside the unit can pose a risk.
• Turn off the circuit breaker if the appliance will not be used for a prolonged period.
• Do not climb on the outdoor unit or place objects on it.
• When using the appliance with doors and windows open (ambient humidity above 80%) and the air flap directed downwards or moving automatically for a prolonged period, condensation may form on the air flap and drip. This could damage furniture. It is advisable not to continue using the appliance under these conditions for extended periods.
• When the room temperature exceeds the cooling or heating capacity of the appliance (e.g., due to many people in the room or use of heating appliances), the set temperature may not be reached.
• Cleaning of the indoor unit should only be performed by authorized personnel. Contact your dealer or distributor. Using commercial detergents may damage plastic parts or clog the drain hose, leading to water leakage and electric shock.
• Do not touch the air outlet, the bottom surface, or the aluminum fins of the outdoor unit. You may get injured.
• Do not touch the refrigerant pipe or the connection valve. You may get burned.
• This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instructions concerning use of the appliance by a person responsible for their safety. Children should be supervised to ensure they do not play with the appliance.

Parts and Functions

Indoor Unit

Air Filter: Filters the air.

Front Panel: The main casing of the indoor unit.

Horizontal Air Flap (Air Outlet): Adjusts the direction of airflow. It opens during operation and closes when stopped.

Horizontal Air Flap (Air Inlet): (Diagram shows air intake)

Indicator Lights: Lights on the indoor unit.

Remote Control Receiver: Receives signals from the remote control to operate the unit.

Remote Control: Sends operating signals to the indoor unit. Allows full control of the unit. (Refer to the remote control manual for details).

Model Names and Dimensions

Note on Multi-System

Multiple indoor units can be connected to one outdoor unit. One or more units can be used as needed.

Combination of Operating Modes:

When an operating mode is selected:

• Indoor units cannot be operated in the following combinations:
  • Heating: Another unit (Cooling, Dehumidification, Fan)
• Automatic Operation: The first indoor unit turned on continues to operate. Other indoor units turned on subsequently enter standby mode with their ON/OFF lights illuminated. To operate these units, set their operating mode to the same mode as the first unit. If the first indoor unit is set to heating, the adjacent unit will also start heating. Similarly, if set to cooling or dehumidification, the adjacent unit will start cooling or dehumidification.

Selection of Indoor Unit Quantity:

Refer to the instruction manual for specifications. Reduce the number of indoor units in service when it is very hot or cold, or when you want to reach the preset temperature quickly.

Indoor Units Stopped:

When an indoor unit is operating in cooling, heating, or dehumidification mode in a single room, refrigerant circulation noise may be produced by a stopped indoor unit, or a stopped indoor unit may heat up. This occurs because the indoor unit returns refrigerant to the outdoor unit to prepare it for operation. When an indoor unit is stopped, refrigerant may flow back to the outdoor unit.

Temporary Switch

Use this switch to start and stop the appliance if the remote control is not functioning.

• Pressing the temporary switch starts the appliance in automatic mode.
• If you use the temporary switch after restarting the appliance, it will operate in automatic mode.

Indoor Unit Indicators

• REFRIGERANT Light: Illuminates or flashes when the optional gas detector is installed. Illuminates when refrigerant leakage is detected in the indoor unit. Flashes when the gas detector's lifespan has expired.
• ON/OFF Light: Illuminates during operation. During heating, this light may flash, dim, or turn off in the following cases: (1) During preheating (heating function) - approximately 2-3 minutes after startup. (2) During defrosting (heating function) - The unit defrosts approximately every hour for 5-10 minutes when frost forms on the outdoor unit's heat exchanger. (More frost may form if the pipe length used is longer than normal.)
• TIMER Light: Illuminates when the timer is operating.

How to Open and Close the Front Panel

Opening the Front Panel:

• To open the front panel, stop the unit's operation using the remote control. Then, press the upper left and right corners of the front panel.
• Grasp the left and right sides of the front panel and pull it towards you.

Closing the Front Panel:

• To close the front panel, press its upper left and right corners.
• Press the center top part of the panel to close it properly.

Adjusting the Air Flap

1. Adjusting the air conditioner up and down:

   The horizontal air flap is automatically set to the angle suitable for each operating mode. The flap can oscillate constantly up and down and can be set to a specific angle by pressing the "(AUTOMATIC SWING)" button.

   • Pressing the "(AUTOMATIC SWING)" button once causes the horizontal air flap to swing up and down. Pressing it again stops the flap in its current position.
   • Use the horizontal air flap within the adjustment limits shown in the illustration.
   • When the "(AUTOMATIC SWING)" button is pressed while the operation is stopped, the horizontal air flap moves and stops at the position corresponding to the closing of the air outlet.
   • When automatic swing is used, if the horizontal air flap position is changed manually, the swing range may change. However, it will return to its initial position after a short period.
   • If the room humidity is high during cooling or dehumidification, the horizontal air flap may automatically tilt to the right to prevent dew formation (except in automatic swing mode).
   • After starting cooling, the unit operates for a given time (approx. 30 minutes) to cool the room rapidly. In this operating mode, if you adjust the horizontal air flap to your preferred angle using the "(AUTOMATIC SWING)" button, it will automatically return to the appropriate angle after a given interval. In this case, press the "(AUTOMATIC SWING)" button again to adjust the flap to your preferred angle.

   Increased Airflow (Heating): Approximately 50°

   Increased Airflow (Cooling, Dehumidification): Approximately 70°

   During Cooling/Dehumidification Modes: Approximately 50°

   During Heating Mode: Approximately 20%

   Vertical Angle: Vertical

2. Adjusting the air conditioner left or right:

   Hold the vertical air flap as shown in the figure and adjust the air conditioner to the left or right.

   ATTENTION: When using the appliance in COOL mode, if the air flap is directed downwards and oscillates automatically for a long period, water may condense on the air flap and drip. This could wet your furniture.

Circuit Breaker

When you are not using the air conditioner, set the circuit breaker to "OFF".

How to Use This Air Conditioner Efficiently

1. A moderate room temperature setting is probably the most ideal and economical solution. Excessive cooling or heating is not good for health and increases electricity costs. Closing curtains and blinds prevents hot air drafts or heat loss and allows for more efficient electricity use.
2. Open doors and windows regularly to let in fresh air. ATTENTION: Ensure the room is ventilated when the air conditioner is operating simultaneously with other heat sources.
3. It is advisable to set the Timer before going to sleep or going out.
4. When cleaning the indoor or outdoor unit, do not use:
   • Normal gasoline or thinner, and do not rub, as this may damage plastic surfaces or pipes.
   • Water above 40°C, as the filter may shrink and plastic parts may deform.
5. Do not block the air inlet or outlet ports.
   • Do not place curtains or other items in front of the air inlet or outlet ports of the indoor or outdoor unit, as this may reduce performance and cause a malfunction.

Maintenance

Air Filter

The filter should be cleaned as it traps dust from the room. Clean the filter every two weeks to prevent excessive electricity consumption.

Procedure:

1. Open the front panel: Stop the unit's operation with the remote control. Press the upper left and right corners of the front panel. Grasp the left and right sides of the front panel and pull it towards you.
2. Remove the filters: (2 filters at the front, 2 filters at the top, 4 filters in total.)
3. Remove dust from filters using a vacuum cleaner. Use a neutral detergent, rinse with clean water, and dry in the shade.
4. Attach the filters: Attach the filters. (2 filters at the front, 2 filters at the top, 4 filters in total.)
5. Close the front panel: Press the upper left and right corners of the front panel. Press the center top part of the panel to close it properly.

ATTENTION:

• Do not wash with hot water above 40°C. The filter will shrink.
• When washing, shake off water droplets completely and let it dry in the shade; do not expose to sunlight. The filter will shrink. Also use a soft sponge. Using a scraper or brush may cause the metallic film on the surface to peel off.
• Do not use the appliance without a filter. This may cause malfunctions.

How to Install and Remove the Front Panel

• Use both hands to grip the front panel when removing or attaching it. The front panel should be installed facing up or down according to user preference.

Removal:

1. Press the hook located on the end of the adhesive tape in the right section of the front panel to remove the tape.
2. Pull the front panel towards you and downwards. Once fully open, pull it off.

Attachment:

1. Attach three front panel supports to the cover's axis. (Position the hook upwards.)
2. Insert the end of the adhesive tape into the hole of the protrusion located in the right section of the front panel.

Cleaning the Front Panel

The front panel can be washed with water to keep it clean at all times.

• The front panel can be removed and washed with water. Gently clean the front panel with a soft sponge.
• When cleaning the air conditioner without removing the front panel, clean the outer casing and the remote control housing with a dry, soft cloth.
• Wipe off water completely. If water remains on the remote control receiver section, it may cause a malfunction.

ATTENTION:

• Do not pour water on or into the appliance body during cleaning. This could cause a short circuit.
• Never use hot water (above 40°C), benzene, gasoline, acid, thinner, or a brush; these products will damage the plastic surfaces and the appliance's paint.

Maintenance for Long Periods of Non-Use:

• Run the air conditioner to dry it and keep the inside of the indoor unit dry to prevent mold formation.
• Turn the switch to OFF.

Air Purifier Filters (SPX-CFH15)

• To install the air purifier filters, remove the air filters and attach them to the hooks in front of the panel board.
• Cooling capacity is slightly reduced and cooling speed is slower when air purifier filters are used. Therefore, set the fan speed to "HIGH" when using them under these conditions.
• Air cleaning filters can be used for two years.

Refrigerant Detector (SPX-RAFGLS)

• The lifespan of the gas detector is approximately 5 years.
• The refrigerant light will illuminate for 4s and turn off for 1s at the start of a cycle during the last month of its lifespan. The machine can still be used at this time. Please replace the gas detector before its lifespan ends.
• The refrigerant light will flash with a 1s ON, 1s OFF cycle after its lifespan has ended. The machine cannot operate if the gas detector has not been replaced.

When the Refrigerant Light Illuminates or Flashes:

When optional gas detector parts are installed, the refrigerant light information is as follows:

• Refrigerant Light Flashing: When the audible alarm sounds from the indoor unit. If refrigerant leakage is detected by the gas detector, ventilate the room and contact your dealer immediately. Press the button (Start/Stop) or the temporary switch to silence the alarm. The fan operation stops automatically if no refrigerant leak is detected. (Customers cannot stop the fan operation themselves.) Even if the alarm sound is silenced, the gas detector continues to detect refrigerant concentration during continuous indoor fan operation. Refrigerant concentration increases the risk of fire. Please ensure air exchange through an open window or by other means. Do not turn off the circuit breaker until the fan has stopped. If the audible alarm does not sound from the indoor unit: Refrigerant leakage has been detected previously on this indoor unit. Please contact your sales agent. Refrigerant leaks are also detected during fan operation. Please ensure continuous ventilation of the room.
• Refrigerant Light Illuminates: The refrigerant light will illuminate for 4s and turn off for 1s at the start of a cycle during the last month of its lifespan. The machine can still be used at this time. Please replace the gas detector before its lifespan ends. The refrigerant light will flash with a 1s ON, 1s OFF cycle after its lifespan has ended. Do not operate the machine without replacing the gas detector.
• Do not forget to turn on the circuit breaker for refrigerant leak detection.
• Please do not use hair spray, pesticides, etc. near the machine. This may cause the machine to stop operating due to error information detected by the gas detector.

Information

Heating Capacity:

This air conditioner uses a heat pump system that absorbs heat from outside and transfers it to the room for heating. Heating capacity decreases as the temperature drops. In this case, the PAM and inverter operate to increase compressor rotation and prevent a decrease in heating capacity. If this is still insufficient, additional heating appliances should be used to improve performance.

ATTENTION: Do not use a stove or other heat source near the indoor unit.

This air conditioner is designed to heat an entire room, so it takes time for the heat to be felt. It is advisable to use the Timer for effective preheating before the desired time.

Cooling and Dehumidification Capacity:

It will be impossible to reach the desired temperature if the room's heat exceeds the appliance's cooling capacity (e.g., due to many people or another heat source in the room).

Regular Inspection

PLEASE CHECK THE FOLLOWING POINTS EVERY SIX MONTHS OR EVERY YEAR. CONTACT YOUR DEALER IF YOU NEED ASSISTANCE.

1. Verify that the unit is properly earthed. WARNING: If the earth conductor is disconnected or defective, the appliance may fail or there may be a risk of short circuit.
2. Ensure there is no rust in the mounting bracket and that the outdoor unit is not unstable or tilted. Otherwise, it could fall and cause injury.

After-Sales Service and Warranty

WHEN REQUESTING AFTER-SALES SERVICE, PLEASE VERIFY THE FOLLOWING POINTS.

The following phenomena do not indicate an appliance defect.

Usage Notes

• Vapor emitted by the outdoor unit: Water evaporating during defrosting operation.
• Odors: Caused by odors and particles from smoke, food, cosmetics, etc., in the room air. These are captured by the unit and blown back into the room.
• Outdoor unit continues to operate even if disconnected: Defrosting (heating mode operation stops, the microcomputer checks for ice accumulated in the indoor unit and automatically commands defrosting if necessary).
• ON/OFF light flashes: Indicates that the preheating or defrosting phase has occurred. It flashes when the protection circuit or preheating sensor continues to operate after the unit has stopped or during preheating, to restart, or when the operating mode changes from cooling to heating.
• Temperature not obtained: The actual room temperature may differ slightly from the temperature set on the remote control depending on the number of people in the room, internal and external conditions, and the influence of other rooms' conditions when the air conditioner is used for multiple rooms simultaneously.
• If the appliance continues not to operate normally after performing the checks above, turn the switch to OFF and contact the dealer immediately.
• Contact your dealer immediately if any of the following anomalies occur:
  • The switch frequently turns off or the fuse blows frequently.
  • The switch operation is unstable.
  • Foreign matter or water has accidentally entered the indoor unit.
  • The power supply cable becomes excessively hot, the sheath is torn, or it is embedded.
  • The TIMER light on the indoor unit flashes. (The flashing cycle indicates the nature of the fault, so check the cycle before turning off the switch.)
  • When an alarm sounds from the indoor unit.
• Turn on the circuit breaker if the refrigerant light was illuminated.

Remarks:

• During slow operation and stopping, the following phenomena may occur occasionally, but they are not entirely abnormal.
  • (1) Refrigerant noise in the refrigerant pipe.
  • (2) A slight noise from the fan case cooling and warming up little by little after stopping.
• An odor may be emitted by the appliance as it tends to retain odors such as smoke, food, cosmetics, etc. Therefore, clean the air filter and evaporator regularly to reduce odors.
• Please contact your dealer immediately if the air conditioner does not operate normally after the inspection above. Inform your dealer of your appliance model, serial number, and installation date. Also, inform them of the specific fault.

Note:

When the equipment starts, especially when the room is dark, a slight variation in brightness may occur. This has no adverse effect.

Conditions imposed by local electricity companies must be respected.