Daikin Room Air Conditioner

Features

Enhanced comfort and energy savings

Other functions

Contents

Read Before Operation

• Safety Considerations
• Names of Parts
• Preparation Before Operation

Basic Operation

• AUTO DRY COOL HEAT FAN Operation
• Adjusting the Airflow Rate
• Adjusting the Airflow Direction

Useful Functions

• COMFORT AIRFLOW / INTELLIGENT EYE Operation
• POWERFUL Operation
• ECONO / OUTDOOR UNIT QUIET Operation

TIMER Operation

• ON/OFF TIMER Operation
• WEEKLY TIMER Operation

Care

• Care and Cleaning

When the Need Arises

• FAQ
• Troubleshooting

Read Before Operation: Safety Considerations

Read these Safety Considerations for Operations carefully before operating an air conditioner or heat pump. Make sure that the unit operates properly during the startup operation. Instruct the user on how to operate and maintain the unit. Inform users that they should store this operation manual with the installation manual for future reference.

Meanings of DANGER, WARNING, CAUTION, and NOTE Symbols:

• DANGER: Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
• WARNING: Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
• 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.
• NOTE: Indicates situations that may result in equipment or property-damage accidents only.

DANGER

• 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

• 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

• 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.

Safety Considerations (Continued)

• 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

• 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

The indoor unit includes:

• Front panel
• Air inlet
• Air outlet
• Model name
• Louvers (vertical blades): Located inside the air outlet. (See Page 14)
• Flaps (horizontal blades) (See Page 14)

The panel tab contains:

• INTELLIGENT EYE sensor: Detects people's movements and automatically switches between normal and energy-saving operation. (See Pages 15, 16)
• Indoor temperature sensor: Detects the air temperature around the unit.

The display area includes:

• Signal receiver: Receives signals from the remote controller. A beep sound is heard upon receiving a signal.
• Case (Operation start, Setting changed, Operation stop)
• Sound type (beep-beep, beep, long beep)
• OPERATION lamp (green)
• TIMER lamp (orange) (See Pages 19, 20, 23)
• INTELLIGENT EYE lamp (green) (See Page 15)

Indoor unit ON/OFF switch: Press once to start operation, press again to stop. For operation mode settings, refer to the table: Mode (AUTO), Temperature setting (77°F / 25°C), Airflow rate (AUTO). This switch can be used when the remote controller is missing.

Outdoor Unit

The outdoor unit includes:

• Air inlet (back and side)
• Air outlet
• Air filter
• Titanium apatite deodorizing filter
• Outdoor temperature sensor (back)
• Inter-unit wire
• Ground terminals (inside)
• Refrigerant pipes
• Drain hose
• Model name

Names of Parts: Remote Controller

Signal transmitter and Receiver

To use the remote controller, aim the transmitter at the indoor unit. Obstructions like curtains may prevent operation. The maximum transmission distance is about 23ft (7m).

Buttons:

• FAN setting button: Selects the airflow rate setting. (See Page 13)
• POWERFUL button: Activates POWERFUL operation. (See Page 17)
• Display (LCD): Shows current settings.
• TEMPERATURE adjustment button: Changes the temperature setting. (See Page 12)
• ON/OFF button: Press to start or stop operation. (See Page 11)
• Front cover: Open to access other controls. (See Page 8)

Model: ARC466A37

Preparation Before Operation

Inserting Batteries

1. Slide the front cover to remove it.
2. Insert 2 dry batteries AAA.LR03 (alkaline).
3. Replace the front cover.

Attaching the Remote Controller Holder

1. Choose a location where signals reach the unit.
2. Attach the holder to a wall or pillar using the supplied screws.
3. Place the remote controller in the holder.

Fahrenheit/Celsius Display Switch

Press the ?️ and ⏰ (TIMER button) buttons simultaneously for about 5 seconds. The temperature display will toggle between Celsius and Fahrenheit.

Notes on Batteries: Remove batteries for long periods of non-use. Replace batteries annually with new AAA.LR03 (alkaline). Replace if the display fades or signal reception declines. Supplied batteries are for initial operation.

Note on Remote Controller: Do not drop or wet the remote controller.

Setting the Clock

Ensure the clock is correct for timer functions to operate accurately.

1. Press the ⏰ button. "0:00" will appear, and "MON" and the day of the week will blink.
2. Press ▶️ to select the current day of the week.
3. Press the ⏰ button. The time will blink.
4. Press ▶️ or ◀️ to set the current time. Holding the buttons adjusts the time rapidly.
5. Press the ⏰ button. Point the remote at the unit. The time will be set.

Fahrenheit/Celsius Display Change: Changing the display may round up the temperature by 0.5°C. A reception sound confirms the change.

Clock Setting: If the internal clock is incorrect, ON/OFF and WEEKLY TIMER operations may be inaccurate.

Basic Operation

AUTO DRY COOL HEAT FAN Operation

The air conditioner operates in your chosen mode. The selected mode will be remembered for future use.

To start operation:

1. Press the MODE button to cycle through AUTO, DRY, COOL, HEAT, FAN modes.
2. Press the ON/OFF button. "ON" will display, and the OPERATION lamp will turn green.

To stop operation:

Press the ON/OFF button again. "ON" will disappear, and the OPERATION lamp will turn off.

Notes on AUTO operation: The system automatically selects COOL or HEAT based on indoor temperature and adjusts settings periodically.

Note on DRY operation: This mode eliminates humidity while maintaining indoor temperature. Temperature and airflow are automatically controlled and cannot be manually adjusted.

Changing the Temperature Setting

Press the TEMP ▲ button to raise the temperature and the TEMP ▼ button to lower it.

Tips for Saving Energy

• Maintain moderate temperature settings: Cooling: 78-82°F (26-28°C), Heating: 68-75°F (20-24°C).
• Cover windows with blinds or curtains to enhance cooling/heating.
• Keep air filters clean for efficient operation. Clean every 2 weeks. (See Page 29)
• For long periods of non-use (spring/autumn), turn off the circuit breaker. The unit consumes a small amount of electricity even when not operating.

Adjusting the Airflow Rate

You can adjust the airflow rate for increased comfort.

To adjust the airflow rate setting:

Press the FAN button. Each press cycles through AUTO, Indoor unit quiet, and Airflow rate 1-5 (Low to High).

Setting the airflow to "?" (quiet operation) reduces noise. In quiet mode, the airflow is set to a low level.

Note on airflow rate: Lower airflow rates may reduce cooling/heating effectiveness.

Adjusting the Airflow Direction

Adjust airflow direction for optimal comfort.

Attention:

• Always use the remote controller. Forcibly moving flaps/louvers can damage the mechanism.
• The fan inside the air outlet rotates at high speed.

To start auto swing:

• Up and down airflow: Press SWING. "↕️" appears on the LCD, and the flaps (horizontal blades) swing.
• Right and left airflow: Press SWING. "↔️" appears on the LCD, and the louvers (vertical blades) swing.
• 3-D airflow: Press SWING twice. "↕️" and "↔️" appear on the LCD. Flaps and louvers move in sequence. To cancel, press SWING again.

To set flaps or louvers at a desired position:

While in auto swing mode, press SWING and SWING when the desired position is reached. "↕️" or "↔️" will disappear.

Notes on airflow direction: Flap movement range varies by operation mode. Flaps may stop at the upper position if airflow is set to low during up/down swing.

Note on 3-D airflow: Circulates air effectively, preventing uneven temperatures.

Useful Functions: COMFORT AIRFLOW / INTELLIGENT EYE Operation

COMFORT AIRFLOW: Airflow is upward in COOL/DRY and downward in HEAT, preventing direct blowing onto occupants.

INTELLIGENT EYE: Detects human presence. If no one is detected for 20 minutes, it switches to energy-saving mode.

CAUTION: Do not place large objects near the INTELLIGENT EYE sensor, as it can detect undesirable items. Do not hit or push the sensor.

To start operation:

Press the COMFORT/SENSOR button to select the desired mode. The INTELLIGENT EYE lamp lights green when INTELLIGENT EYE is selected.

Selecting "?️" combines COMFORT AIRFLOW with INTELLIGENT EYE.

To cancel operation:

Press the COMFORT/SENSOR button until no icon is displayed. The INTELLIGENT EYE lamp will turn off if it was active.

INTELLIGENT EYE Operation for Energy Saving

When people are detected in the sensing area, the unit operates normally. When no people are detected for 20 minutes, the unit enters energy-saving mode, and the INTELLIGENT EYE lamp turns off.

Energy saving adjustments: Temperature shifts by -3.6°F (-2°C) in HEAT, +3.6°F (+2°C) in COOL/DRY. If room temperature exceeds 86°F (30°C), temperature shifts by +1.8°F (+1°C) in COOL/DRY. Airflow rate may decrease slightly in FAN operation.

Notes: COMFORT AIRFLOW may be canceled if up/down airflow direction is selected. INTELLIGENT EYE operation is not available during POWERFUL operation or NIGHT SET mode.

POWERFUL Operation

This mode maximizes cooling/heating effect by operating at maximum capacity. It lasts for 20 minutes, then reverts to previous settings.

To start POWERFUL operation:

Press the POWERFUL button. "?" will display.

To cancel POWERFUL operation:

Press the POWERFUL button again. "?" will disappear.

Notes: POWERFUL operation does not increase capacity beyond the unit's maximum. In COOL/HEAT/AUTO, temperature and airflow are fixed. In DRY, temperature lowers and airflow increases slightly. In FAN, airflow is fixed at maximum.

Combinations: POWERFUL operation is not available with COMFORT AIRFLOW or ECONO. Priority is given to the last button pressed.

ECONO / OUTDOOR UNIT QUIET Operation

ECONO: Limits maximum power consumption, useful for shared circuits.

OUTDOOR UNIT QUIET: Lowers outdoor unit noise by adjusting frequency and fan speed, ideal for nighttime use.

To start operation:

Press the ECONO/QUIET button to select ECONO, OUTDOOR UNIT QUIET, Combination, or No Setting.

To cancel operation:

Press the ECONO/QUIET button until no icon is displayed.

Notes: ECONO operation may not reduce power consumption if it's already low. OUTDOOR UNIT QUIET operation may reduce cooling/heating effectiveness.

TIMER Operation

ON/OFF TIMER Operation

Timer functions automate switching the air conditioner on or off. ON and OFF timers can be used together.

To use ON TIMER operation:

Ensure the clock is correct (See Page 10).

1. Press the ON button. "ON" and the time will blink.
2. Press SELECT ▼ or SELECT ▲ to set the desired time (increments of 10 minutes).
3. Press the ON button again. "ON" and the set time will display, and the TIMER lamp will light orange.

To cancel ON TIMER operation:

Press the CANCEL button. "ON" and the set time disappear, and the TIMER lamp turns off.

Notes on TIMER operation: The current time is not displayed when a timer is set. Actual operation may differ slightly from the set time. The ON/OFF TIMER remembers previous settings. Reset the timer after power interruptions or battery replacement.

OFF TIMER Operation

To use OFF TIMER operation:

Ensure the clock is correct (See Page 10).

1. Press the OFF button. "OFF" and the time will blink.
2. Press SELECT ▼ or SELECT ▲ to set the desired time.
3. Press the OFF button again. "OFF" and the set time will display, and the TIMER lamp will light orange.

To cancel OFF TIMER operation:

Press the CANCEL button. "OFF" and the set time disappear, and the TIMER lamp turns off.

To combine ON TIMER and OFF TIMER operation:

Example: Set OFF TIMER for 0:00 and ON TIMER for 14:00.

NIGHT SET mode: When OFF TIMER is set, temperature adjusts automatically to prevent excessive cooling/heating during sleep.

WEEKLY TIMER Operation

Save up to 4 timer settings per day for your lifestyle. Settings can be copied between days.

Setting Example:

Monday: Program 1 ON (6:00), Program 2 OFF (8:30), Program 3 ON (17:30, 81°F/27°C), Program 4 OFF (22:00).

Tuesday-Friday: Copy Monday's settings.

Saturday: No timer settings.

Sunday: Program 1 ON (8:00), Program 2 OFF (10:00), Program 3 OFF (19:00, 81°F/27°C), Program 4 ON (21:00, 81°F/27°C).

Up to 28 reservations per week can be set. Use copy mode for easier programming. ON-ON-ON-ON settings allow mode and temperature changes. OFF-OFF-OFF-OFF settings allow only turn-off time to be set.

To use WEEKLY TIMER operation:

Ensure the day of the week and time are set.

1. Press WEEKLY. The day and reservation number display.
2. Press SELECT ▼ or SELECT ▲ to select the day and reservation number.
3. Press NEXT. The day and reservation number are set. "WEEKLY" and "ON" blink.
4. Press SELECT ▼ to choose ON, OFF, or blank (to delete).
5. Press NEXT. The ON/OFF TIMER mode is set. "WEEKLY" and the time blink.
6. Press SELECT ▼ to set the desired time (0:00-23:50 in 10-min increments).
7. Press NEXT. The time is set. "WEEKLY" and temperature blink.
8. Press SELECT ▼ to set the desired temperature (50°F-90°F / 10°C-32°C).
9. Press NEXT. Confirmation tone and blinking OPERATION lamp indicate setting is complete.
10. Press NEXT to complete the setting. "WEEKLY" displays, activating the operation.

Notes: Set the clock first. WEEKLY TIMER and ON/OFF TIMER cannot be used simultaneously; ON/OFF TIMER has priority. Reset the clock after power failures.

Copy Mode

Copy settings from one day to another.

1. Press COPY.
2. Press SELECT ▼ to confirm the source day.
3. Press COPY. Settings are copied.
4. Press SELECT ▼ to choose the destination day.
5. Press COPY. Settings are pasted.
6. Press NEXT to complete. "WEEKLY" displays.

Note on COPY MODE: Individual settings can be modified after copying.

Confirming a Reservation

1. Press WEEKLY.
2. Press SELECT ▼ to select the day and reservation number to confirm.
3. Press NEXT to exit confirmation mode.

Deactivating WEEKLY TIMER Operation

Press WEEKLY while "WEEKLY" is displayed. "WEEKLY" disappears, and the TIMER lamp turns off. Press WEEKLY again to reactivate.

Deleting Reservations

Individual Reservation:

1. Press SELECT ▼.
2. Press SELECT ▼ to select the day and reservation number.
3. Press NEXT.
4. Press SELECT ▼ until no icon is displayed (select "blank").
5. Press NEXT. The reservation is deleted.

Reservations for each day of the week:

1. Press SELECT ▼.
2. Press SELECT ▼ to select the day to delete.
3. Hold WEEKLY for 5 seconds. The day's reservations are deleted.

All reservations:

Hold WEEKLY for 5 seconds with the normal display. All reservations are deleted.

Care and Cleaning

CAUTION: Turn off the power before cleaning. Do not touch aluminum fins, as they are sharp.

Quick Reference: Cleaning Parts

• Front panel: Wipe with a soft damp cloth.
• Air filter: Vacuum or wash. Clean every 2 weeks. (See Page 29)
• Titanium apatite deodorizing filter: Vacuum dust (every 6 months) or replace (every 3 years).
• Indoor unit and remote controller: Wipe with a soft cloth.

Note on Cleaning Agents: Do not use water over 104°F (40°C), volatile liquids, polishing compounds, or rough materials.

Front Panel Cleaning

1. Open the front panel.
2. Remove the front panel by sliding and disengaging shafts.
3. Clean with a soft damp cloth and neutral detergent. Rinse and dry if washed with water.
4. Attach the front panel by aligning shafts with grooves.
5. Close the front panel slowly, ensuring it is securely fixed.

Air Filter Cleaning

1. Open the front panel.
2. Pull out air filters by pushing up the filter tab.
3. Wash filters with water or clean with a vacuum cleaner. For stubborn dirt, wash with lukewarm water and neutral detergent, then dry in shade.
4. Reattach filters.
5. Close the front panel.

Operation with dirty filters: Reduces deodorizing/cleaning ability, poor heating/cooling, may cause odor.

Titanium Apatite Deodorizing Filter

1. Open front panel and pull out air filters.
2. Remove titanium apatite filters by unhooking claws.
3. Cleaning: Vacuum dust, soak in lukewarm water for 10-15 minutes if very dirty. Do not remove filter from frame when washing.
4. Replacement: Remove old filter from frame, attach new one. Reuse frame. Check filter is set properly. Dispose of old filter as non-flammable waste.
5. Set titanium apatite filters back.
6. Reattach filters and close front panel.

To order a filter: Contact your dealer.

Care Before Long Period of Non-Use

1. Operate in FAN mode for several hours to dry the inside.
2. Turn off the circuit breaker.
3. Clean air filters and reattach them.
4. Remove batteries from the remote controller to prevent leakage.

Periodical Maintenance: Recommended for maintaining performance. Contact dealer for qualified contractor maintenance.

When the Need Arises: FAQ

Indoor Unit

• Flaps not swinging immediately: Unit is adjusting flap position.
• No airflow during HEAT operation: Airflow is reduced/stopped when set temperature is reached to prevent cool air. Operation resumes when indoor temperature falls.
• HEAT operation stops suddenly with flowing sound: Outdoor unit is defrosting. HEAT operation resumes after frost removal (4-12 minutes).
• Operation does not start soon: Unit may be protecting itself after being turned off/mode reselected. Wait about 3 minutes.

Different Sounds Heard:

• Flowing water sound: Refrigerant flow or water pumping from the unit during COOL/DRY.
• Blowing sound: Refrigerant flow switching.
• Ticking sound: Cabinet/frame expansion/contraction due to temperature changes.
• Whistling sound: Refrigerant flow during defrosting.
• Clicking sound: Refrigerant control valves or electrical parts operating.
• Clopping sound: Exhaust fan activation. Open window or turn off fan.

Outdoor Unit

• Operating sound is loud: May increase slightly when frost forms on the heat exchanger.
• Emits water or steam: In HEAT mode, melting frost during defrosting. In COOL/DRY, condensation from the outdoor unit piping.

Troubleshooting

Check these points before contacting a dealer. If problems persist, consult your dealer.

The air conditioner does not operate

• OPERATION lamp is off: Check circuit breaker/fuse, power failure, or remote controller batteries.
• OPERATION lamp is blinking: Turn off power via circuit breaker, restart. If blinking continues, check error code and consult dealer. (See Page 36)

The air conditioner suddenly stops operating

• OPERATION lamp is on: May stop temporarily due to voltage fluctuations; resumes in ~3 minutes.
• OPERATION lamp is blinking: Check for dirty air filters, or obstructions at air inlets/outlets. Remove obstructions after turning off power. If blinking continues, check error code and consult dealer. (See Page 36)

The air conditioner does not stop operating

• Continues operating after stop: Outdoor unit fan may continue rotating for ~1 minute for protection. Fan may also run when outdoor temperature is high.

The room does not cool down / warm up

• Air does not come out: In HEAT, waits 1-4 minutes to prevent cold air. No airflow during defrosting. Unit may be preparing to operate after power-on; wait 3-10 minutes.
• Air does not come out / Air comes out: Check airflow rate setting (increase if low), set temperature, and airflow direction. Check for furniture obstructions, ECONO/QUIET mode, dirty filters, blocked inlets/outlets, open windows/doors, or active exhaust fans.

Water or mist comes out

• Mist from indoor unit: Cooling air creates mist.
• Water leaking from indoor unit: Check for crushed/clogged drain hose. Stop operation and contact dealer.

Remote controller issues

• No signals / limited range: Batteries may be low. Replace with new AAA.LR03 (alkaline). Signal may be affected by fluorescent lamps. Direct sunlight on transmitter may cause issues.
• LCD faint/erratic: Batteries may be low. Replace with new AAA.LR03 (alkaline).
• Other devices start operating: Move remote controller away from other devices.

Air has an odor

• Odor from unit: Room odor absorbed by the unit is discharged. Recommend indoor unit cleaning. Dirty heat exchanger/fan may cause odor. Do not use deodorizers.

Other issues

• Strange behavior: May be due to lightning or radio interference. Turn off power and restart.
• HEAT operation unavailable: Check jumper (J8) setting. Contact dealer if cut.
• Timer not operating correctly: Check if ON/OFF and WEEKLY timers are set for the same time. Adjust WEEKLY TIMER settings.
• Ceiling/walls dirty: Air circulation and static electricity can cause dust to stick. Recommend cleaning the area around the unit.

Notes on Operating Conditions: Operation outside specified conditions may cause safety device activation. Dew may form on the indoor unit in COOL/DRY mode.

Fault Diagnosis by Remote Controller

The remote controller can display error codes from the indoor unit.

1. Hold the CANCEL button for about 5 seconds. "00" will blink in the temperature display.
2. Press CANCEL repeatedly until a long beep is heard. The code indication will change, showing error codes and meanings.

Note: Short beeps indicate non-corresponding codes. Hold CANCEL for 5 seconds to cancel display.

Call Your Dealer Immediately

WARNING: If an abnormality (e.g., burning smell) occurs, stop operation and turn off the circuit breaker. Continued operation may lead to problems, electric shock, or fire. Do not attempt repairs yourself.

Contact your dealer if:

• The power cord is hot or damaged.
• An abnormal sound is heard.
• The circuit breaker trips frequently.
• A switch or button is faulty.
• 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 unit will resume operation in about 3 minutes.

Lightning: If lightning is a risk, turn off the circuit breaker to protect the system.

Disposal Requirements: Follow local and national regulations for unit dismantling, refrigerant, oil, and parts disposal.

Quick Reference

Diagrams illustrating remote control functions and operation modes.

Daikin North America LLC

19001 Kermier Road, Houston, TX 77484

https://www.northamerica-daikin.com/