Fujitsu AOTR24LFL User Manual

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KEEP THIS OPERATION MANUAL

FOR FUTURE REFERENCE

FUJITSU GENERAL LIMITED

OPERATING MANUAL

P/N9315345301

Indoor Unit

ASTA24LFC

ASTA30LFC

Outdoor Unit

AOTR24LFL

AOTR30LFT

HEAT & COOL MODEL

(REVERSE CYCLE)

ROOM AIR CONDITIONER

WALL MOUNTED TYPE

R410A

REFRIGERANT

This Air Conditioner contains and

operates with refrigerant R410A.

THIS PRODUCT MUST ONLY BE INSTALLED OR SERVICED

BY QUALIFIED PERSONNEL.

Refer to Commonwealth, State, Territory and local legislation,

regulations, codes, installation & operation manuals, before

the installation, maintenance and/or service of this product.

9315345301_OM_EN_cover 3/22/10, 10:42 AM1

Questions and Answers:

D
Darryl AvilaAug 15, 2025
Why is my Fujitsu AOTR24LFL Air Conditioner cooling poorly?
- S
  Stanley SmithAug 15, 2025
  Several factors can impact the cooling performance of your Fujitsu Air Conditioner: * Check if the air filter is dirty. * Ensure that the air conditioner’s intake grille or outlet port are not blocked. * Verify that you have correctly adjusted the room temperature settings (thermostat). * Make sure no windows or doors are open. * If it is cooling operation, check if a window is allowing bright sunlight to enter (close the curtains). * In cooling operation, consider if there are heating apparatus and computers inside the room, or too many people. * Confirm that the unit is not set for SUPER QUIET operation.
D
dean77Aug 18, 2025
What to do if my Fujitsu AOTR24LFL Air Conditioner doesn't operate at all?
- P
  Patrick PowellAug 18, 2025
  If your Fujitsu Air Conditioner isn't operating, check the following: * Ensure the Power Supply Plug is properly connected to the outlet. * Verify there hasn't been a power failure. * Check if a fuse has blown out, or a circuit breaker has been tripped. * Confirm that the timer is not in operation.
M
Mrs. Natalie ChambersAug 21, 2025
How to fix a Fujitsu AOTR24LFL that doesn’t operate immediately?
- J
  Jessica HubbardAug 22, 2025
  If your Fujitsu unit is stopped and then immediately started again, the compressor will not operate for about 3 minutes to prevent fuse blowouts. Also, whenever the Power Supply Plug is disconnected and then re-connected to a power outlet, the protection circuit will operate for about 3 minutes, preventing unit operation during that period.
C
Cory TerrellAug 25, 2025
Why is my Fujitsu AOTR24LFL Air Conditioner operating differently from the remote setting?
- D
  Debra RamosAug 26, 2025
  If your Fujitsu unit operates differently from the Remote Controller’s setting, check if the Remote Controller’s batteries are dead or if the Remote Controller’s batteries are loaded properly.
Y
Yesenia CoxAug 28, 2025
Why is water being produced from the outdoor unit of my Fujitsu AOTR24LFL Air Conditioner?
- J
  Jessica PatrickAug 28, 2025
  During Heating operation, water may be produced from the outdoor unit of your Fujitsu Air Conditioner due to Automatic Defrosting operation.
S
Shannon GallowaySep 1, 2025
Why is my Fujitsu AOTR24LFL making noise?
- M
  Melissa MitchellSep 1, 2025
  Your Fujitsu Air Conditioner may make noise due to normal operation. You might hear the sound of water flowing in the air conditioner’s piping during operation and immediately after stopping the unit. Noise may be particularly noticeable for about 2 to 3 minutes after starting operation because of coolant flowing. During Heating operation, a sizzling sound may be heard occasionally, which is produced by the Automatic Defrosting operation.
J
Jeremy ChristensenSep 4, 2025
Why is my Fujitsu AOTR24LFL Air Conditioner emitting mist or steam?
- T
  timothy08Sep 4, 2025
  During Cooling or Dry operation, a thin mist may be seen emitted from the indoor unit. During Heating operation, the outdoor unit’s fan may stop, and steam may be seen rising from the unit due to Automatic Defrosting operation.
A
Anthony MartinezSep 12, 2025
Why does my Fujitsu AOTR24LFL smell?
- T
  Trevor EdwardsSep 12, 2025
  Some smell may be emitted from the indoor unit of your Fujitsu Air Conditioner. This smell results from room smells (furniture, tobacco, etc.) taken into the air conditioner.

Fujitsu AOTR24LFL Specifications

General

Brand	Fujitsu
Model	AOTR24LFL
Category	Air Conditioner
Language	English

Summary

Features and Functions

Inverter Technology

Explains how the inverter adjusts power for quick temperature control and energy efficiency.

Operation Modes and Timers

Details Coil Dry, Auto Changeover, Super Quiet modes, and Program/Sleep Timers.

Airflow Control Options

Covers horizontal/downward airflow settings and Omni-directional swing operation.

Air Quality and Filters

Describes air cleaning and deodorizing filters, plus maintenance features.

Remote Control Systems

Covers Wireless Remote Controller and optional Wired Remote Controller.

Name of Parts

Indoor Unit Components (Fig. 1)

Details of indoor unit components from Fig. 1, including intake grille, air filter, and louvers.

Outdoor Unit Components (Fig. 5)

Details of outdoor unit components from Fig. 5, including intake and outlet ports.

Remote Controller Buttons (Fig. 6)

Identifies and describes buttons 1-34 on the wireless remote controller.

Remote Controller Display Elements (Fig. 7)

Explains indicators 35-44 shown on the remote controller's display.

Indoor Unit Parts (Continued)

Provides additional details on indoor unit components not fully described on page 4.

Remote Controller Buttons (Continued)

Continues the description of remote controller buttons from page 4.

Remote Controller Display (Continued)

Continues the explanation of remote controller display indicators from page 4.

Preparation

Loading Remote Batteries

Instructions for inserting and handling batteries for the remote controller, including cautions.

Setting Current Time

Steps to set the current time on the remote controller for timer functions.

Remote Controller Usage

Guidelines for operating the remote controller, including signal reception and range.

Remote Controller Holder Installation

Instructions for mounting the holder for the remote controller.

Operation

Select Operation Mode

Steps to start operation and select modes like AUTO, COOL, DRY, HEAT, or FAN.

Set Thermostat Temperature

Instructions for adjusting the desired room temperature setting.

Set Fan Speed

Guide to selecting fan speed levels: AUTO, HIGH, MED, LOW, or QUIET.

Super Quiet Operation

Details on activating quieter operation by reducing indoor unit airflow.

Stop Operation

Procedure to turn off the air conditioner using the START/STOP button.

Auto Changeover Operation

Explanation of how the unit automatically selects the operating mode based on room conditions.

Mode Operation Details

Specifics on Heating, Cooling, Dry, and Fan modes, including performance and limitations.

Timer Operation

Using ON/OFF Timers

Steps to set single ON or OFF timers for scheduled operation.

Using Program Timer

Instructions for setting integrated ON and OFF timer sequences.

Sleep Timer Operation

Using the Sleep Timer

How to set the sleep timer for gradual temperature adjustment and auto-stop.

Manual Auto Operation

Using Main Unit Controls

Instructions for operating the unit directly from the main control panel.

Adjusting Air Circulation Direction

Vertical Air Direction Adjustment

How to adjust the up/down airflow direction using the remote controller.

Horizontal Air Direction Adjustment

How to adjust the left/right airflow direction using the remote controller.

Swing Operation

Selecting and Stopping Swing

Steps to activate, stop, and understand swing airflow direction.

Coil Dry Operation

Using Coil Dry Function

How to activate, cancel, and understand the purpose of Coil Dry operation.

Cleaning and Care

Cleaning the Intake Grille

Instructions for removing and cleaning the main intake grille.

Cleaning the Air Filter

Steps for removing, cleaning, and replacing the air filters.

Air Cleaning Filter Installation

Guide to installing new air cleaning filters.

Replacing Air Filters

Instructions for replacing used air cleaning filters with new ones.

Deodorizing Filter Maintenance

Steps for cleaning and maintaining the negative air ions deodorizing filter.

Troubleshooting

Non-Operation Issues

Checks for immediate non-operation, including power, fuse, and timer status.

Noise and Smell Issues

Addresses operational noises and unusual smells originating from the unit.

Mist, Steam, and Water Issues

Covers mist/steam emission and water production from the outdoor unit.

Airflow and Cooling Performance

Details causes for weak/stopped airflow and poor cooling performance.

Remote Control Setting Mismatches

Covers unit operation differing from remote settings and battery issues.

Operating Tips

Temperature and Humidity Range

Defines the operational limits for cooling, dry, and heating modes.

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