Fujitsu AU*F12LA User Manual (English)

Questions and Answers:

C
Cynthia RiosAug 16, 2025
Why is my Fujitsu AU*F12LA having poor cooling or heating performance?
- S
  Samantha SchmidtAug 16, 2025
  If your Fujitsu Air Conditioner isn't cooling or heating well, several factors could be the cause. Start by checking if the air filter is dirty and clean it if necessary. Ensure that the air conditioner's intake grille or outlet port isn't blocked. Verify that you've correctly adjusted the thermostat settings. Also, check for open windows or doors, and close them. If it's during cooling operation, close the curtains to block direct sunlight. Finally, consider if there are too many heat-generating appliances or people in the room, and make sure the unit isn't set to QUIET operation.
O
ojohnsAug 19, 2025
What to do if my Fujitsu AU*F12LA doesn’t operate at all?
- A
  Ashley BallAug 19, 2025
  If your Fujitsu Air Conditioner doesn't operate at all, consider the following possible causes: * Check if the circuit breaker has been turned off. * Verify whether there has been a power failure. * See if a fuse has blown out or a circuit breaker has been tripped. * Check if the timer is operating.
K
kennethramirezAug 21, 2025
Why doesn't my Fujitsu AU*F12LA respond to the remote controller's settings?
- K
  Katrina JonesAug 22, 2025
  If your Fujitsu Air Conditioner isn't responding to the remote controller, it could be due to dead or improperly loaded batteries. Check whether the remote controller’s batteries are dead and ensure the remote controller’s batteries are loaded properly.
S
Samantha DeleonAug 25, 2025
Why is water being produced from the outdoor unit of my Fujitsu AU*F12LA Air Conditioner?
- K
  Kevin BakerAug 26, 2025
  During heating operation of your Fujitsu Air Conditioner, water may be produced from the outdoor unit. This is a normal occurrence due to the Automatic Defrosting operation.
C
christopherbrownAug 28, 2025
How to stop the ECONOMY Indicator Lamp from flashing on my Fujitsu Air Conditioner?
- M
  Michael BartonAug 28, 2025
  If the ECONOMY Indicator Lamp is flashing on your Fujitsu Air Conditioner, you should clean the filter. After cleaning, turn the ECONOMY lamp off.
S
Susan LewisSep 2, 2025
Why doesn’t my Fujitsu AU*F12LA operate immediately?
- M
  Makayla AdamsSep 3, 2025
  If your Fujitsu Air Conditioner doesn’t operate immediately after being turned on, it could be due to a built-in protection mechanism. If the 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 reconnected, the protection circuit will operate for about 3 minutes.
S
susan68Sep 6, 2025
Why does my Fujitsu AU*F12LA Air Conditioner emit mist or steam?
- M
  Matthew LeeSep 6, 2025
  During cooling or dry operation of your Fujitsu Air Conditioner, a thin mist may be seen emitted from the indoor unit. This results from the sudden cooling of room air, leading to condensation. During heating operation, the outdoor unit’s fan may stop, and steam may rise from the unit due to the Automatic Defrosting operation.
J
Jacob WilsonSep 9, 2025
Why does my Fujitsu AU*F12LA Air Conditioner smell?
- D
  Dr. Travis MillerSep 9, 2025
  The smell emitted from your Fujitsu Air Conditioner is the result of room odors (from furniture, tobacco, etc.) that have been taken into the indoor unit.
C
Cheryl MooreSep 12, 2025
Why is noise heard from my Fujitsu AU*F12LA?
- T
  Timothy MooreSep 12, 2025
  During operation of your Fujitsu Air Conditioner, the sound of water flowing in the air conditioner’s piping may be heard. Also, noise may be particularly noticeable for about 2 to 3 minutes after starting operation (sound of coolant flowing). During heating operation, a sizzling sound may be heard occasionally, which is produced by the Automatic Defrosting operation.

Fujitsu AU*F12LA Specifications

General

Brand	Fujitsu
Model	AU*F12LA
Category	Air Conditioner
Language	English

Summary

Features and Functions

Energy Saving Features

Covers INVERTER, ECONOMY, SUPER QUIET, AUTO CHANGEOVER, and 10°C HEAT operations for efficiency.

Timer and Control Functions

Details PROGRAM TIMER, SLEEP TIMER, and remote controller functionalities.

Unit Maintenance Features

Explains REMOVABLE INTAKE GRILLE and MILDEW-RESISTANT FILTER for upkeep.

Indoor Unit Parts Identification

Air Filter and Intake Grille

Identifies the air filter and the main intake grille on the indoor unit.

Control Panel and Indicators

Details the control panel, signal receiver, manual button, and indicator lamps.

Remote Controller Components

Display Panel Indicators Explained

Describes all possible indicators on the remote controller's display.

Remote Controller Buttons Overview

Lists and briefly explains the function of each button on the remote.

Initial Setup and Preparation

Battery Installation Guide

Step-by-step instructions for inserting batteries into the remote controller.

Setting the Current Time

Guide on how to set the clock on the remote controller.

Remote Controller Usage Basics

How to use the remote, its range, and mounting the holder.

Core Operation Procedures

Selecting Operation Modes

How to choose between AUTO, COOL, DRY, HEAT, and FAN modes.

Adjusting Room Temperature

Instructions for setting the desired temperature using the remote.

Setting Fan Speed Levels

Guide to selecting fan speeds from AUTO to QUIET.

Utilizing Super Quiet Operation

How to activate and benefit from the quiet operation mode.

Operational Mode Details

Stopping Air Conditioner Operation

Procedure for turning off the unit.

Understanding Auto Mode

Explains the AUTO CHANGEOVER function and its logic.

Mode-Specific Operation Insights

Details on Heating, Cooling, Dry, and Fan modes' specific behaviors.

Timer Functionality

Setting ON/OFF Timers

Step-by-step guide for setting individual ON or OFF timers.

Timer Management and Cancellation

Procedures for changing timer settings or cancelling them.

Utilizing Program Timers

How to set combined ON and OFF timer sequences.

Sleep Timer and Manual Controls

Sleep Timer Operation Guide

How to set, adjust, and cancel the sleep timer function.

Manual Operation via Unit Controls

Using the MANUAL AUTO button on the indoor unit.

Airflow Direction and Swing

Vertical Airflow Adjustment

Instructions for controlling the vertical direction of airflow.

Horizontal Airflow Adjustment

Information regarding the unavailability of horizontal airflow adjustment.

Swing Operation Functionality

How to activate and deactivate the automatic louver swing.

Special Operating Modes

Economy Operation Mode

Details on using, stopping, and the benefits of ECONOMY mode.

10°C Heat Operation Mode

How to activate, deactivate, and the purpose of 10°C HEAT mode.

Cleaning and Filter Care

Air Filter Cleaning Procedure

Comprehensive steps for removing, cleaning, and reinstalling the air filter.

Settings and Signal Management

Filter Reset Indicator Procedure

Steps to reset the filter indicator lamp after cleaning.

Selecting Remote Controller Signal Codes

Guide to changing signal codes for multi-unit installations.

Troubleshooting Common Issues

Basic Operational Problems

Solutions for unit not operating, noise, smells, mist, or weak airflow.

Indicator and Water-Related Issues

Addresses ECONOMY lamp flashing and outdoor unit water production.

Advanced Troubleshooting Checks

Comprehensive Operational Diagnostics

Further checks for complete non-operation, poor performance, and remote setting discrepancies.

Operating Tips and Advanced Features

Performance and Environmental Advice

Tips for heating, high temperatures, and low ambient cooling.

Automatic Functions Explained

Details on Automatic Defrosting and AUTO Restart after power interruption.

Multi-Unit Control Options

Information on using Dual Remote Controllers and Group Control.

Multi-Type Air Conditioner Usage

Simultaneous Operation of Multiple Units

Guidance for operating multiple indoor units with one outdoor unit.

Mode Combination Restrictions

Explains incompatible operating mode combinations for multi-type systems.

Related product manuals

Fujitsu AU*F12LA User Manual

Table of Contents

Questions and Answers:

Fujitsu AU*F12LA Specifications

Summary

Features and Functions

Energy Saving Features

Timer and Control Functions

Unit Maintenance Features

Indoor Unit Parts Identification

Air Filter and Intake Grille

Control Panel and Indicators

Remote Controller Components

Display Panel Indicators Explained

Remote Controller Buttons Overview

Initial Setup and Preparation

Battery Installation Guide

Setting the Current Time

Remote Controller Usage Basics

Core Operation Procedures

Selecting Operation Modes

Adjusting Room Temperature

Setting Fan Speed Levels

Utilizing Super Quiet Operation

Operational Mode Details

Stopping Air Conditioner Operation

Understanding Auto Mode

Mode-Specific Operation Insights

Timer Functionality

Setting ON/OFF Timers

Timer Management and Cancellation

Utilizing Program Timers

Sleep Timer and Manual Controls

Sleep Timer Operation Guide

Manual Operation via Unit Controls

Airflow Direction and Swing

Vertical Airflow Adjustment

Horizontal Airflow Adjustment

Swing Operation Functionality

Special Operating Modes

Economy Operation Mode

10°C Heat Operation Mode

Cleaning and Filter Care

Air Filter Cleaning Procedure

Settings and Signal Management

Filter Reset Indicator Procedure

Selecting Remote Controller Signal Codes

Troubleshooting Common Issues

Basic Operational Problems

Indicator and Water-Related Issues

Advanced Troubleshooting Checks

Comprehensive Operational Diagnostics

Operating Tips and Advanced Features

Performance and Environmental Advice

Automatic Functions Explained

Multi-Unit Control Options

Multi-Type Air Conditioner Usage

Simultaneous Operation of Multiple Units

Mode Combination Restrictions

Related product manuals