DAIKIN ROOM AIR CONDITIONER

Safety Considerations

DANGER: Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.

• Do not install the unit in an area where flammable materials are present due to risk of explosion resulting in serious injury or death.
• Any abnormalities in the operation of the air conditioner or heat pump, such as smoke or fire, could result in severe injury or death. Turn off the power and contact your dealer immediately.
• Refrigerant gas may produce toxic gas if it comes into contact with fire, such as from a fan heater, stove, or cooking device. Exposure to this gas could cause severe injury or death.
• For refrigerant leakage, consult your dealer. Refrigerant gas is heavier than air and replaces oxygen. A massive leak could lead to oxygen depletion, especially in basements, and an asphyxiation hazard could occur leading to serious injury or death.
• If equipment utilizing a burner is used in the same room as the air conditioner or heat pump, there is the danger of oxygen deficiency which could lead to an asphyxiation hazard resulting in serious injury or death. Be sure to ventilate the room sufficiently to avoid this hazard.
• Safely dispose of the packing materials. Packing materials, such as nails and other metal or wooden parts, may cause stabs or other injuries.
• Tear apart and throw away plastic packaging bags so that children will not play with them. Children playing with plastic bags face the danger of death by suffocation.

WARNING: Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.

• Contact your dealer for repair and maintenance. Improper repair and maintenance may result in water leakage, electric shock, and fire. Only use accessories made by Daikin that are specifically designed for use with the equipment and have them installed by a professional.
• Contact your dealer to move and reinstall the air conditioner or heat pump. Incomplete installation may result in water leakage, electric shock, and fire.
• Never let the indoor unit or the remote controller get wet. Water can cause an electric shock or a fire.
• Never use flammable spray such as hair spray, lacquer, or paint near the unit. Flammable spray may cause a fire.
• When a fuse blows out, never replace it with one of incorrect ampere ratings or different wires. Always replace any blown fuse with a fuse of the same specification.
• Never remove the fan guard of the unit. A fan rotating at high speed without the fan guard is very dangerous.
• Never inspect or service the unit by yourself. Contact a qualified service person to perform this work.
• Turn off all electrical power before doing any maintenance to avoid the risk of serious electric shock; never sprinkle or spill water or liquids on the unit.
• Do not touch the switch with wet fingers. Touching a switch with wet fingers can cause electric shock.
• Do not allow children to play on or around the unit to prevent injury.
• The heat exchanger fins are sharp enough to cut. To avoid injury wear gloves or cover the fins while working around them.
• Do not put a finger or other objects into the air inlet or air outlet. The fan is rotating at high speed and will cause injury.
• Check the unit foundation for damage on a continuous basis, especially if it has been in use for a long time. If left in a damaged condition the unit may fall and cause injury.
• Placing a flower vase or other containers with water or other liquids on the unit could cause a shock or fire if a spill occurs.
• Do not touch the air outlet or horizontal blades while the swing flap is in operation because fingers could get caught and injured.
• Never touch the internal parts of the controller. Do not remove the front panel because some parts inside are dangerous to touch. To check and adjust internal parts, contact your dealer.

CAUTION: Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury. It may also be used to alert against unsafe practices.

• Do not use the air conditioner or heat pump for any other purposes other than comfort cooling or heating. Do not use the unit for cooling precision instruments, food, plants, animals or works of art.
• Do not place items under the indoor unit as they may be damaged by condensates that may form if the humidity is above 80% or if the drain outlet gets blocked.
• Before cleaning, stop the operation of the unit by turning the power off or by pulling the supply cord out from its receptacle. Otherwise, an electric shock and injury may result.
• Do not wash the air conditioner or heat pump with excessive water. An electric shock or fire may result.
• Avoid placing the controller in a spot splashed with water. Water entering the controller may cause an electric shock or damage the internal electronic parts.
• Do not operate the air conditioner or heat pump when using a room-fumigation type of insecticide. Failure to observe this could cause the chemicals to be deposited in the unit and can endanger the health of those who are hypersensitive to chemicals.
• Do not turn off the power immediately after stopping operation. Always wait for at least 5 minutes before turning off the power. Otherwise, water leakage may occur.
• The appliance is not intended for use by young children or infirm persons without supervision.
• The remote controller should be kept away from children so they cannot play with it.
• Consult with the installation contractor for cleaning.
• Incorrect cleaning of the inside of the air conditioner or heat pump could make the plastics parts break and cause water leakage or electric shock.
• Do not touch the air inlet or aluminum fin of the air conditioner or heat pump as they can cut and cause injury.
• Do not place objects in direct proximity of the outdoor unit. Do not let leaves and other debris accumulate around the unit. Leaves are a hotbed for small animals which can enter the unit. Once inside the unit, animals can cause the unit to malfunction, and cause smoke or fire when they make contact with electrical parts.

NOTE: Indicates situations that may result in equipment or property-damage accidents only.

• Never press the button of the remote controller with a hard, pointed object. The remote controller may be damaged.
• Never pull or twist the electric wire of the remote controller. It may cause the unit to malfunction.
• Do not place appliances that produce open flames in places that are exposed to the airflow of the unit or under the indoor unit. It may cause incomplete combustion or deformation of the unit due to the heat.
• Do not expose the controller to direct sunlight. The LCD display can become discolored and may fail to display the data.
• Do not wipe the controller operation panel with benzene, thinner, chemical dust cloth, etc. The panel may get discolored or the coating can peel off. If it is heavily dirty, soak a cloth in water-diluted neutral detergent, squeeze it well and wipe the panel clean. Then wipe it with another dry cloth.
• Dismantling of the unit, disposal of the refrigerant, oil, and additional parts, should be done in accordance with the relevant local, state, and national regulations.
• Operate the air conditioner or heat pump in a sufficiently ventilated area and not surrounded by obstacles. Do not use the air conditioner or heat pump in the following places.
  • a. Places with a mist of mineral oil, such as cutting oil.
  • b. Locations such as coastal areas where there is a lot of salt in the air.
  • c. Locations such as hot springs where there is a lot of sulfur in the air.
  • d. Locations such as factories where the power voltage varies a lot.
  • e. In cars, boats, and other vehicles.
  • f. Locations such as kitchens where oil may splatter or where there is steam in the air.
  • g. Locations where equipment produces electromagnetic waves.
  • h. Places with an acid or alkaline mist.
  • i. Places where fallen leaves can accumulate or where weeds can grow.
• Take snow protection measures. Contact your dealer for the details of snow protection measures, such as the use of a snow protection hood.
• Do not attempt to do electrical work or grounding work unless you are licensed to do so. Consult with your dealer for electrical work and grounding work.
• Pay attention to operating sound. Be sure to use the following places:
  • a. Places that can sufficiently withstand the weight of the air conditioner or heat pump yet can suppress the operating sound and vibration.
  • b. Places where warm air from the air outlet of the outdoor unit or the operating sound of the outdoor unit does not annoy neighbors.
• Make sure that there are no obstacles close to the outdoor unit. Obstacles close to the outdoor unit may drop the performance of the outdoor unit or increase the operating sound of the outdoor unit.
• Consult your dealer if the air conditioner or heat pump in operation generates unusual noise.
• Make sure that the drainpipe is installed properly to drain water. If no water is discharged from the drainpipe while the air conditioner or heat pump is in the cooling mode, the drainpipe may be clogged with dust or dirt and water leakage from the indoor unit may occur. Stop operating the air conditioner or heat pump and contact your dealer.

Names of Parts

Indoor Unit (Models FTX09/12/15/18/24NMVJU / FTXN09/12/18/24NMVJU)

• Front panel
• Air inlet
• Flaps (horizontal blades)
• Louvers (vertical blades) - located inside the air outlet.
• Air outlet
• Model name
• Indoor temperature sensor - Detects the air temperature around the unit.
• Display
• Signal receiver - Receives signals from the remote controller. A beep sound indicates reception.
• Case
• Operation lamps: OPERATION (green), TIMER (orange).
• Indoor unit ON/OFF switch - Press once to start, press again to stop. Can be used when the remote controller is missing.
• Titanium apatite photocatalytic air-purifying filter (without frame for FTXN09/12NMVJU, sold separately; with frame for others, sold separately for FTXN18/24NMVJU).
• Air filter

Outdoor Unit

The appearance may differ between models.

• Air inlet (back and side)
• Air outlet
• Outdoor temperature sensor (back)
• Refrigerant pipes and inter-unit wire
• Model name
• Ground terminal (inside)
• Drain hose

Remote Controller

• Display (LCD) - Shows current settings.
• Signal transmitter
• Buttons: AUTO, COOL, DRY, HEAT, FAN ONLY, TEMPERATURE adjustment, COMFORT, POWERFUL, OFF TIMER (NIGHT SET mode), OFF, FAN setting, ECONO, SWING, ON TIMER, TIMER CANCEL.
• Receiver - Aim transmitter at the indoor unit. Obstructions can block signals. Maximum transmission distance is about 23ft (7m).

Models: Remote Controller ARC480A8 with backlight, ARC480A6 without backlight.

Preparation Before Operation

Remote Controller Holder Installation:

• Choose a place where signals reach the unit.
• Attach the holder to a wall, pillar, or similar location with screws.
• Hang the remote controller on the holder.

Battery Installation:

1. Remove the back cover by sliding and lifting.
2. Insert 2 dry batteries AAA.LR03 (alkaline).
3. Replace the back cover.

Fahrenheit/Celsius Display Switch:

• Press and hold [TIMER button] and [Temperature Down Button] simultaneously for about 5 seconds.
• The temperature display will toggle between Fahrenheit and Celsius. This is only possible when the temperature is being displayed.

Turn on the circuit breaker.

NOTE: After power is turned on, the flap of the indoor unit opens and closes once to set the reference position.

Notes on batteries:

• When replacing batteries, use the same type and replace both old batteries together.
• Batteries last about 1 year. If the display fades or transmission range shortens, replace both batteries with new AAA.LR03 (alkaline) batteries.
• Supplied batteries are for initial operation and may run out in less than 1 year.

Note on remote controller:

• Do not drop or get the remote controller wet.

Fahrenheit/Celsius display change function:

• Changing to Celsius from Fahrenheit may round up 0.5°C, potentially increasing the set temperature (e.g., 65°F ≈ 18.5°C becomes 19°C, which converts back to 66°F).
• A reception sound confirms transmission of the set temperature.

AUTO, COOL, DRY, HEAT, FAN ONLY Operation

To start operation:

• Press [AUTO button] for automatic selection of temperature and mode.
• Press [COOL button] to lower the temperature.
• Press [DRY button] to lower humidity.
• Press [HEAT button] to raise the temperature.
• Press [FAN ONLY button] to circulate air.

The OPERATION lamp lights green.

Notes on AUTO operation:

• The system automatically selects COOL or HEAT based on indoor temperature and adjusts settings periodically to reach the user-set level.

Note on DRY operation:

• Eliminates humidity while maintaining indoor temperature. Temperature and airflow rate are automatically controlled and cannot be manually adjusted.

To stop operation

Press [OFF button]. The OPERATION lamp goes off.

To change the temperature setting

Press [TEMPERATURE adjustment button] (up arrow) to raise, and [TEMPERATURE adjustment button] (down arrow) to lower the temperature.

• COOL operation: 64-90°F (18-32°C)
• HEAT operation: 50-86°F (10-30°C)
• AUTO operation: 64-86°F (18-30°C)
• DRY or FAN ONLY operation: Temperature setting cannot be changed.

Tips for saving energy

• Keep temperature settings moderate (Cooling: 78-82°F / 26-28°C; Heating: 68-75°F / 20-24°C).
• Cover windows with blinds or curtains to block sunlight and outdoor air.
• Keep air filters clean (clean every 2 weeks).
• Turn off the circuit breaker if not using the air conditioner for extended periods (spring, autumn) as it consumes a small amount of electricity when off.

Adjusting the Airflow Rate

To adjust the airflow rate setting:

Press [FAN setting button]. Each press cycles through settings:

• AUTO
• Indoor unit quiet
• Airflow rate 1-5 (Low to High)

When set to "Indoor unit quiet", quiet operation starts, reducing noise. Airflow rate is set to a weak level.

Note on airflow rate setting: Smaller airflow rates result in smaller cooling/heating effects.

DRY operation: Airflow rate setting cannot be changed.

Adjusting the Airflow Direction

To adjust airflow direction for comfort.

CAUTION:

• Always use the remote controller to adjust flap angles. Forcible movement by hand may cause malfunction.
• Be careful when adjusting louvers; the fan rotates at high speed inside the air outlet.

To start auto swing (Up and down airflow direction):

Press [SWING button]. "SWING" is displayed on the LCD. The flap (horizontal blade) swings.

To set the flap at the desired position:

Press [SWING button] again when the flap reaches the desired position. "SWING" disappears from the LCD.

To adjust the louvers at desired position:

Hold the knobs and move the louvers (vertical blades).

Notes on airflow direction setting:

• Movable range of the flap varies by operation mode.
• The flap stops at the upper position if airflow rate is set to low during up/down swing.

Diagrams showing louvers and flap adjustment for different models are described textually.

COMFORT AIRFLOW Operation

Adjusts air direction and flow rate to avoid blowing directly at people.

To start: Press [COMFORT button]. "COMFORT" is displayed on the LCD.

• COOL and DRY operation: Flap direction goes up, airflow rate is AUTO.
• HEAT operation: Flap direction goes down, airflow rate is AUTO.

Not available in FAN ONLY mode.

To cancel: Press [COMFORT button] again. "COMFORT" disappears. Flap returns to previous memory position.

POWERFUL Operation

Quickly maximizes cooling/heating effect by operating at maximum capacity.

To start: Press [POWERFUL button]. "POWERFUL" is displayed on the LCD.

POWERFUL operation ends automatically after 20 minutes. The system then resumes previous settings.

To cancel: Press [POWERFUL button] again. "POWERFUL" disappears.

Notes on POWERFUL operation:

• Pressing the button again cancels the setting.
• POWERFUL operation does not increase capacity beyond the unit's maximum.
• In COOL, HEAT, and AUTO: Outdoor unit capacity increases, airflow is max, temperature setting is fixed.
• In DRY: Temperature setting lowers by 4.5°F (2.5°C), airflow slightly increases.
• In FAN ONLY: Airflow rate is fixed at maximum.

ECONO Operation

Limits maximum power consumption for efficient operation, useful for preventing circuit breaker trips when using multiple appliances on one circuit.

To start: Press [ECONO button]. "ECONO" is displayed on the LCD.

Not available in FAN ONLY mode.

To cancel: Press [ECONO button] again. "ECONO" disappears.

Notes on ECONO operation:

• Pressing the button again cancels the setting.
• If power consumption is already low, ECONO operation will not further reduce it.

Function Combinations:

• COMFORT AIRFLOW + ECONO: Available
• POWERFUL + COMFORT AIRFLOW: Not available (Last pressed button takes priority)
• POWERFUL + ECONO: Not available (Last pressed button takes priority)

ON/OFF TIMER Operation

Timer functions allow automatic switching on or off at set times.

To use ON TIMER operation:

Press [ON TIMER button]. "ON TIMER" is displayed. Each press increments the time by 1 hour. Set between 1 and 12 hours. The TIMER lamp lights orange.

To cancel: Press [TIMER CANCEL button]. "ON TIMER" disappears. TIMER lamp goes off.

NOTE: In cases of circuit breaker trip, power failure, or battery replacement, the timer must be reset.

To use OFF TIMER operation:

Press [OFF TIMER button]. "OFF TIMER" is displayed. Each press increments the time by 1 hour. Set between 1 and 12 hours. The TIMER lamp lights orange.

To cancel: Press [TIMER CANCEL button]. "OFF TIMER" disappears. TIMER lamp goes off.

To combine ON TIMER and OFF TIMER operation:

Both "ON TIMER" and "OFF TIMER" indicators are displayed.

Example Settings:

• When setting while unit is operating: Stops the unit 1 hour later and starts it 7 hours after that.
• When setting while unit is stopped: Starts the unit 2 hours later and stops it 3 hours after that.

NIGHT SET mode:

• When OFF TIMER is set, the temperature adjusts automatically (0.9°F / 0.5°C up in COOL, 3.6°F / 2.0°C down in HEAT) to prevent excessive cooling/heating during sleep.

Care and Cleaning (Models FTX09/12/15/18/24NMVJU / FTXN09/12/18/24NMVJU)

CAUTION:

• Before cleaning, stop operation and turn off the circuit breaker.
• Do not touch aluminum fins of the indoor unit; they can cause injury.

Quick Reference:

NOTE: Do not use hot water (>104°F/40°C), volatile liquids (benzene, thinner), polishing compounds, or rough materials for cleaning.

Air filter Cleaning Procedure

1. Open the front panel.
2. Pull out the air filters (push filter tab upwards, then pull down).
3. Wash filters with water or vacuum. If dust is stubborn, wash with thinned neutral detergent and lukewarm water, then dry in shade.
4. Reattach the filters.
5. Close the front panel slowly, ensuring it is securely fixed.

Titanium apatite photocatalytic air-purifying filter Cleaning/Replacement Procedure

1. Open front panel and pull out air filters.
2. Take off the titanium apatite photocatalytic air-purifying filters (remove from tabs).
3. Clean or replace:
   • Cleaning: Vacuum dust. Soak in lukewarm water for 10-15 mins if very dirty. Shake off water and dry in shade. Do not wring.
   • Replacement: Remove filter from frame, prepare new one. Dispose of old filter as non-flammable waste.
4. Insert new/cleaned filters. Ensure they are set properly in tabs.
5. Reattach air filters.
6. Close front panel slowly.

NOTE: Operation with dirty filters reduces deodorizing/cleaning ability, causes poor performance, and may lead to odors. Dispose of old filters as non-flammable waste. Order replacements from dealer.

Filter Part Numbers:

• Titanium apatite photocatalytic air-purifying filter (without frame): KAF970A46
• Titanium apatite photocatalytic air-purifying filter (with frame): KAF970A45 (Recommended for first-time purchase for FTXN18/24NMVJU).

Care and Cleaning (All models)

Prior to a long period of non-use

1. Operate the FAN ONLY mode for several hours to dry the inside. Press [FAN ONLY button].
2. After operation stops, turn off the circuit breaker.
3. Remove batteries from the remote controller.

We recommend periodical maintenance:

• In certain conditions, the unit may get fouled after several seasons, reducing performance. Periodical maintenance by a qualified contractor is recommended in addition to user cleaning.
• Contact the dealer for contractor maintenance services.

FAQ

Indoor unit

• The flap does not start swinging immediately.: The air conditioner is adjusting the flap position; it will start moving soon.
• The air conditioner stops generating airflow during HEAT operation.: Once the set temperature is reached, airflow is reduced and operation stops to avoid cool airflow. Operation resumes automatically when indoor temperature falls.
• HEAT operation stops suddenly and a flowing sound is heard.: The outdoor unit is defrosting. HEAT operation resumes after frost removal (approx. 4-12 minutes).
• Operation does not start soon.: This is a protective measure. Wait about 3 minutes after pressing [AUTO] or a direct operation button soon after stopping, or after reselecting the mode.
• Different sounds are heard.:
  • Sound like flowing water: Refrigerant is flowing or water is being pumped out during COOL/DRY operation.
  • Blowing sound: Refrigerant flow is switching over.
  • Ticking sound: Cabinet/frame expands/shrinks due to temperature changes.
  • Whistling sound: Refrigerant flows during defrosting.
  • Clicking sound: Refrigerant control valves or electrical parts operate.
  • Clapping sound: Heard from inside when exhaust fan is activated with room doors closed. Open a window or turn off the exhaust fan.

Outdoor unit

• Operating sound is loud.: Operating sound level increases slightly when frost forms on the heat exchanger.
• The outdoor unit emits water or steam.:
  • In HEAT operation: Frost on the outdoor unit melts into water or steam during defrosting.
  • In COOL or DRY operation: Moisture condenses on cool piping and drips.

Remote controller

• The unit does not receive signals or has a limited operating range:
  • Batteries may be exhausted. Replace both with new AAA.LR03 (alkaline) batteries. (See Preparation Before Operation).
  • Signal communication may be disabled if an electronic-starter-type fluorescent lamp (inverter-type) is in the room. Consult your dealer.
  • The remote controller may not function correctly if the transmitter is exposed to direct sunlight.
  • Batteries may be exhausted. Replace both with new AAA.LR03 (alkaline) batteries. (See Preparation Before Operation).
• LCD is faint, not working, or the display is erratic: Batteries may be exhausted. Replace both with new AAA.LR03 (alkaline) batteries. (See Preparation Before Operation).
• Other electric devices start operating: If the remote controller activates other electric devices, move them away or consult your dealer.

Air has an odor

• The air conditioner gives off an odor: Room odor absorbed by the unit is discharged with airflow. Cleaning of the indoor unit is recommended; consult your dealer.

Others

• The air conditioner suddenly starts behaving strangely during operation: The air conditioner may malfunction due to lightning or radio interference. Turn off the power with the circuit breaker and restart operation with the remote controller.

Notes on the operating conditions:

• If operation continues under conditions other than those listed, a safety device may activate to stop operation, or dew may form and drip from the indoor unit during COOL or DRY operation.

Troubleshooting

Before making an inquiry or a request for repair, please check the following. If the problem persists, consult your dealer.

Not a problem: This case is not a problem.

Check: Please check again before requesting repairs.

The air conditioner does not operate

The air conditioner suddenly stops operating

The air conditioner does not stop operating

The room does not cool down / warm up

Mist comes out of the indoor unit

This happens when the air in the room is cooled into mist by the cold airflow during COOL or other operation.

Air has an odor

The room odor absorbed in the unit is discharged with the airflow. We recommend you to have the indoor unit cleaned. Please consult your dealer.

Others

The air conditioner may malfunction due to lightning or radio. If the air conditioner malfunctions, turn off the power with the circuit breaker and restart the operation with the remote controller.

Call your dealer immediately

WARNING: When an abnormality (such as a burning smell) occurs, stop operation and turn off the circuit breaker. Continued operation in an abnormal condition may result in problems, electric shock or fire. Consult the dealer where you bought the air conditioner. Do not attempt to repair or modify the air conditioner by yourself. Incorrect work may result in electric shock or fire. Consult the dealer where you bought the air conditioner.

If one of the following symptoms takes place, call your dealer immediately:

• The power cord is abnormally hot or damaged.
• An abnormal sound is heard during operation.
• The circuit breaker, a fuse, or the ground fault circuit interrupter cuts off the operation frequently.
• A switch or a button often fails to work properly.
• There is a burning smell.
• Water leaks from the indoor unit.

Turn off the circuit breaker and call your dealer.

After a power failure: The air conditioner automatically resumes operation in about 3 minutes. You should just wait for a while.

Lightning: If there is a risk lightning could strike in the neighborhood, stop operation and turn off the circuit breaker to protect the system.

Disposal requirements:

• Dismantling of the unit, handling of the refrigerant, oil and other parts, should be done in accordance with the relevant local and national regulations.

Fault diagnosis by remote controller

The remote controller can receive relevant error codes from the indoor unit.

1. When [TEST button] is held down for about 5 seconds, "TEST" blinks in the temperature display section.
2. Press [TEST button] repeatedly until a continuous beep is produced. The code indication changes as shown below, and notifies you with a long beep.

NOTE: A short beep indicates non-corresponding codes. To cancel the code display, hold [TEST button] down for about 5 seconds. The code display also clears if no button is pressed for 1 minute.