Fujitsu AOT24PMAL - User Manual

Questions and Answers

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Patricia FloydAug 13, 2025
Why is my Fujitsu AOT24PMAL not cooling or heating properly?
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  Andre WashingtonAug 13, 2025
  Several factors can impact the cooling or heating performance of your Fujitsu Air Conditioner. Check the following: * Ensure the air filter is clean. * Make sure the air conditioner's intake filter or outlet port isn't blocked. * Verify that you've correctly adjusted the thermostat settings. * Check if any windows or doors are open. * If cooling, close curtains to block direct sunlight. Also, consider if there are heat-generating devices or too many people in the room.
J
Jason ThomasAug 17, 2025
What to do if my Fujitsu Air Conditioner doesn't operate at all?
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  Martin SmithAug 17, 2025
  If your Fujitsu Air Conditioner isn't operating, check the following: * Confirm there hasn't been a power failure. * Check if a fuse has blown or a circuit breaker has been tripped. * Verify if the timer is operating.
R
Robert WarrenAug 20, 2025
Why is my Fujitsu AOT24PMAL Air Conditioner not responding to the remote control settings?
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  courtney52Aug 20, 2025
  If your Fujitsu Air Conditioner isn't responding to the remote control, check if the remote control's batteries are dead or if they are loaded properly.
S
Sabrina SmithAug 25, 2025
Why is water coming from the outdoor unit of my Fujitsu AOT24PMAL?
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  James WardAug 25, 2025
  Water may be produced from the outdoor unit of your Fujitsu Air Conditioner during Heating operation due to Automatic Defrosting.
A
Amanda SmithAug 28, 2025
Why does the airflow of my Fujitsu AOT24PMAL become weak or stop?
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  Shaun WhiteAug 28, 2025
  There are several reasons why the airflow from your Fujitsu Air Conditioner might weaken or stop: * When heating starts, the fan speed is temporarily low to warm internal parts. * During heating, if the room gets too warm, the outdoor unit will stop, and the indoor unit will operate at a low fan speed. Increase the thermostat setting if you want more heat. * The unit will temporarily stop during heating (for 7-15 minutes) for automatic defrosting; the OPERATION lamp will flash during this time. * The fan may operate at a very low speed during dry operation or when monitoring the room's temperature. * In monitor AUTO operation, the fan runs at a very low speed.
B
bbakerAug 31, 2025
Why is my Fujitsu AOT24PMAL emitting mist or steam?
- S
  Shannon ReedSep 1, 2025
  The emission of mist or steam from your Fujitsu Air Conditioner can occur for the following reasons: * During Cooling or Dry operation, a thin mist may appear due to the rapid cooling of room air, leading to condensation. * During Heating, the outdoor unit's fan might stop, and steam may rise from the unit during Automatic Defrosting.
K
kmercadoSep 4, 2025
What are the reasons for noises coming from my Fujitsu AOT24PMAL Air Conditioner?
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  Brandon HenrySep 5, 2025
  Various noises can be heard during the operation of your Fujitsu Air Conditioner: * The sound of water flowing in the piping may be heard during and immediately after operation. * A slight squeaking sound can occur due to the expansion and contraction of the front cover caused by temperature changes. * During Heating, a sizzling sound may occasionally occur due to the Automatic Defrosting operation.
D
Deborah PattersonSep 8, 2025
Why does my Fujitsu AOT24PMAL Air Conditioner smell?
- C
  Cory BarnesSep 8, 2025
  A smell emitted from your Fujitsu Air Conditioner's indoor unit may be due to room odors (furniture, tobacco, etc.) that have been drawn into the unit.

Summary

Features and Functions

Automatic Operation

Unit operates automatically based on room temperature and thermostat setting.

Sleep Timer

Adjusts thermostat setting gradually and turns off unit at set time.

Wireless Remote Control Unit

Allows convenient control of air conditioner operation.

Omni-Directional Air Flow (Swing Operation)

Three-dimensional control of air direction swing (up/down and right/left).

Removable Intake Filter

Intake filter can be removed for easy cleaning and maintenance.

Mildew-Resistant Filter

Intake filter treated to resist mildew growth for cleaner use.

Super Quiet Operation

Reduces indoor unit airflow for quieter operation.

Air Cleaning Filter

Purifies and deodorizes air using electrostatic principle.

Preparation

Load Batteries

Instructions for loading batteries into the remote control.

Set the Current Time

Procedure to set the current time on the remote control.

Use the Remote Control Unit

Guidelines for operating the remote control unit.

Remote Control Unit Holder

Instructions for mounting the remote control holder.

Operation

Select Mode Operation

How to select operating modes like AUTO, HEAT, COOL, DRY, FAN.

Set Thermostat

Adjusting the desired temperature setting for the air conditioner.

Set Fan Speed

Changing the fan speed settings (AUTO, HIGH, MED, LOW, QUIET).

Stop Operation

Procedure to turn off the air conditioner.

About Mode Operation

Detailed explanations of AUTO, Heating, Cooling, Dry, and Fan modes.

Timer Operation

Use ON;OFF Timer

Instructions for setting the ON or OFF timer.

Use PROGRAM Timer

Setting a sequence of ON and OFF timer operations.

Stop Operation During Timer

How to stop the unit while a timer is active.

Change Operating Conditions

Modifying mode, fan speed, or temp during timer.

About PROGRAM Timer

Explanation of the PROGRAM timer functionality.

Sleep Timer Operation

Use SLEEP Timer

Setting the sleep timer to stop the unit after a specified duration.

Stop Operation During SLEEP Timer

Manually stopping the unit while sleep timer is active.

About SLEEP Timer

Explanation of how the sleep timer adjusts temperature.

Manual Auto Operation

Use Main Unit Controls

Operating the unit directly from the main control panel.

Adjusting the Direction of Air Circulation

Vertical Air Direction Adjustment

How to adjust the up-down airflow direction.

Horizontal Air Direction Adjustment

How to adjust the right-left airflow direction.

Swing Operation

Vertical Swing Operation

Enabling and disabling vertical airflow swing.

Horizontal Swing Operation

Enabling and disabling horizontal airflow swing.

About Swing Operation

Explains swing range and temporary stops.

Cleaning and Care

Cleaning the Intake Filters

Step-by-step guide to remove, clean, and install intake filters.

Air Cleaning Filter

Features of Air Purifying and Deodorizing Filters

Describes the functions of Wasabi and Charcoal filters.

Installing Air Purifying and Deodorizing Filters

Steps for installing the air cleaning filters.

Air Cleaning Filter

Installation Precautions

Important notes for installing air cleaning filters.

Replacing Air Purifying and Deodorizing Filters

Information on filter lifespan and replacement.

Troubleshooting

Unit Does Not Operate Immediately

Checks for immediate start-up issues.

Smells from Unit

Addresses potential odors from the indoor unit.

Mist or Steam Emission

Explains mist/steam during cooling or heating.

Water from Outdoor Unit

Explains water production during heating.

Troubleshooting

Poor Cooling or Heating Performance

Diagnosing reduced cooling or heating efficiency.

Unit Operates Differently From Remote

Resolving discrepancies between remote and unit operation.

Operating Tips

Heating Performance

Explains heat-pump performance and room heating time.

High Indoor;Outdoor Temperatures

Notes on fan operation during high temperatures.

Automatic Defrosting

Explanation of the defrosting function and indicator.

Low Ambient Cooling

Describes fan speed changes in low ambient cooling.

Operating Tips

AUTO Restart (Power Interruption)

Unit automatically restarts after power loss.

Temperature and Humidity Range

Recommended operating ranges for different modes.

This document is an operating manual for a Fujitsu Room Air Conditioner, specifically the Ceiling Wall Type INVERTER models. The indoor units are AWT24PBA and AWT30PBA, and the outdoor units are AOT24PMAL and AOT30PMAL.

Function Description:

The air conditioner offers various operating modes:

Automatic Operation: The unit automatically selects Heating, Cooling, or Monitor modes based on the thermostat setting and room temperature. When first selected, the fan operates at a very low speed for about one minute to detect room conditions. If the room temperature is near the thermostat setting, it enters monitor operation (low fan speed). If the temperature changes, it re-adjusts.
Heating Mode: Used to warm the room. The fan operates at a very low speed for 3-5 minutes initially to allow the indoor unit to warm up before full operation. If the room temperature is very low, the unit may automatically enter a defrost cycle, during which the OPERATION indicator lamp (red) flashes, and heating is interrupted. The thermostat setting must be higher than the current room temperature for heating to operate.
Cooling Mode: Used to cool the room. The thermostat setting must be lower than the current room temperature for cooling to operate.
Dry Mode: Used for gentle cooling while dehumidifying. The unit operates at low speed, and the indoor unit's fan may stop periodically to adjust humidity. Fan speed cannot be manually changed in this mode. Heating is not available in Dry mode. The thermostat setting must be lower than the current room temperature for dry mode to operate.
Fan Mode: Circulates air throughout the room without heating or cooling. The fan alternately turns on and off, running at low speed when on.

Important Technical Specifications:

Thermostat Setting Range:
- AUTO: 18 to 30 °C
- Heating: 16 to 30 °C
- Cooling/Dry: 18 to 30 °C
Operating Temperature and Humidity Range:
- Cooling Mode:
  - Outdoor temperature: About 0 to 43 °C
  - Indoor temperature: About 18 to 32 °C
  - Indoor humidity: About 80% or less
- Dry Mode:
  - Outdoor temperature: About 0 to 43 °C
  - Indoor temperature: About 18 to 32 °C
  - Indoor humidity: About 80% or less
- Heating Mode:
  - Outdoor temperature: About -10 to 21 °C
  - Indoor temperature: About 30 °C or less
Remote Control Unit Operating Range: About 7 meters.

Usage Features:

Wireless Remote Control Unit: Allows convenient control of all air conditioner operations.
Omni-Directional Air Flow (Swing Operation): Provides three-dimensional control over air direction through dual use of UP/DOWN and RIGHT/LEFT air direction swing. UP/DOWN flaps operate automatically based on the operating mode.
- Vertical Air Direction Adjustment: Controlled by the AIR FLOW DIRECTION VERTICAL SET button. The air direction range changes with each press. During Cooling/Dry mode, horizontal flow (position ①) is recommended to prevent condensation. During Heating mode, downward flow (position ⑤) is recommended.
- Horizontal Air Direction Adjustment: Controlled by the AIR FLOW DIRECTION HORIZONTAL SET button. The air direction range changes with each press.
- Vertical Airflow SWING Operation: Pressing the AIR FLOW DIRECTION VERTICAL SWING button makes the UP/DOWN air direction flaps swing automatically. The SWING indicator lamp (VERTICAL SWING) lights.
- Horizontal Airflow SWING Operation: Pressing the AIR FLOW DIRECTION HORIZONTAL SWING button makes the RIGHT/LEFT air direction louvers swing automatically. The SWING indicator lamp (HORIZONTAL SWING) lights.
Sleep Timer Operation: Automatically modifies the thermostat setting during sleep to prevent excessive warming or cooling.
- During Heating: Thermostat setting is lowered 1 °C every 30 minutes, up to a total of 4 °C, then maintained until the set time, after which the unit turns off.
- During Cooling/Dry: Thermostat setting is raised 1 °C every 60 minutes, up to a total of 2 °C, then maintained until the set time, after which the unit turns off.
Timer Operation (ON/OFF/PROGRAM):
- ON Timer: Starts operation at a set time. The unit begins operation before the set time to reach the desired temperature by the set time ("Nice-Morning Timer").
- OFF Timer: Stops operation at a set time.
- PROGRAM Timer: Integrates OFF and ON timer operations in a sequence within a 24-hour period. The first timer to operate is the one set nearest to the current time.
Super Quiet Operation: Selecting "QUIET" with the FAN CONTROL button reduces the indoor unit's airflow for quieter operation.
Manual Auto Operation: In case the remote control unit is lost or unavailable, the MANUAL AUTO button on the main unit control panel can be used. The unit will operate in AUTO mode with fan speed "AUTO" and thermostat setting 23 °C.
AUTO Restart: In case of power interruption, the air conditioner automatically restarts in the previously selected mode once power is restored. If a power failure occurs during TIMER operation, the timer is reset, and the unit begins (or stops) operating under the new timer setting, with the TIMER indicator lamp flashing.

Maintenance Features:

Removable Intake Filter: The indoor unit's intake filter can be easily removed for cleaning.
- Cleaning: Dust can be removed by vacuuming or washing with mild detergent and warm water. Filters should be dried thoroughly in a shady place before reinstallation.
- Frequency: Intake filters should be cleaned every five weeks during normal use.
Mildew-Resistant Filter: The intake filter is treated to resist mildew growth for cleaner use and easier care.
Air Cleaning Filter:
- Air Purifying Filter (Wasabi Filter): Catches dust mites, tobacco smoke, and other common pollutants, and inactivates mold and bacteria.
  - Replacement: Normal life is about three months. Replace with UTR-FB11.
- Deodorizing Filter (Light Recovery Filter): Absorbs tobacco smoke, pet dander, and other contaminants.
  - Regeneration: Remove dust by vacuuming and place in direct sunlight for six hours every six months to regenerate the deodorizing effect. No need to replace for three years under normal conditions.
- Installation: Involves removing intake filters, attaching the air purifying or deodorizing filter to the holder on the filter frame, and then reinstalling the intake filters.
- Precautions: Do not wash these filters, place them near hot appliances, or store them in hot/humid locations. Set fan speed to "HIGH" for increased efficiency when using these filters.

Safety Precautions:

Installation and Repair: Do not attempt self-installation or repair. Always consult authorized service personnel.
Movement: Consult authorized service personnel for disconnection and installation.
Exposure: Avoid prolonged exposure to direct airflow.
Objects: Do not insert fingers or objects into outlets/intake grilles. Do not climb on, place objects on, or hang objects from the indoor unit. Do not set flower vases or water containers on top of the unit.
Water: Do not expose the unit directly to water or operate with wet hands.
Power: Do not start/stop operation by turning off the electrical breaker or disconnecting the power supply plug. Always turn off the electrical breaker or disconnect the power supply plug when cleaning or not using the unit for extended periods.
Malfunction: In case of malfunction (e.g., burning smell), immediately stop operation, turn off the electrical breaker, disconnect the power supply plug, and consult authorized service personnel.
Ventilation: Provide occasional ventilation during use.
Airflow Direction: Use the remote control unit buttons to adjust air direction. Manual adjustment can cause improper operation. Avoid setting UP/DOWN flaps in range ④ to ⑤ for long periods in Cooling/Dry modes to prevent condensation.
Radiator Fins: Do not apply heavy pressure.
Filters: Operate only with air filters installed. Do not block or cover intake grille and outlet port.
Electronic Equipment: Keep electronic equipment at least one meter away from indoor/outdoor units.
Location: Avoid installing near fireplaces or heating apparatus.
Infants: Take precautions to prevent infant access to units.
Flammable Gases: Do not use near flammable gases.
Batteries: Prevent infants from swallowing batteries. Remove batteries if the remote control unit is not used for an extended period. Dispose of dead batteries properly. Do not recharge dry batteries or mix new and used batteries. If battery fluid contacts skin, eyes, or mouth, wash immediately and consult a physician.