Fujitsu AST30 SERIES - User Manual

Questions and Answers:

W
Wendy KennedyAug 14, 2025
Why is my Fujitsu AST30 Air Conditioner cooling (or heating) poorly?
- A
  alexander74Aug 14, 2025
  Poor cooling or heating performance in your Fujitsu Air Conditioner can be due to several reasons: * A dirty air filter. * Blocked intake grille or outlet port. * Incorrect room temperature settings. * Open window or door. * Bright sunlight entering the window during Cooling operation (close the curtains). * Too many people or heating apparatus and computers inside the room during Cooling operation.
D
Douglas BrockAug 17, 2025
What to do if my Fujitsu AST30 doesn’t operate at all?
- L
  Lisa CollinsAug 17, 2025
  If your Fujitsu Air Conditioner doesn’t operate at all, check the following: * Has there been a power failure? * Has a fuse blown out, or a circuit breaker been tripped? * Is the timer operating?
P
Peter HowardAug 25, 2025
What to do if my Fujitsu AST30 operates differently from the remote control unit’s setting?
- F
  frankdelgadoAug 25, 2025
  If your Fujitsu Air Conditioner operates differently from the remote control unit’s setting, check if: * The remote control unit’s batteries are dead. * The remote control unit’s batteries are loaded properly.
X
xwilsonAug 27, 2025
Why is water produced from the outdoor unit of my Fujitsu Air Conditioner?
- M
  matthewhughesAug 27, 2025
  During Heating operation, water may be produced from the outdoor unit of your Fujitsu Air Conditioner due to the Automatic Defrosting operation.
L
Lindsay NicholsonAug 31, 2025
Why is there noise coming from my Fujitsu Air Conditioner?
- M
  Michael GonzalesAug 31, 2025
  The noises you hear from your Fujitsu Air Conditioner could be due to: * The sound of water flowing in the air conditioner’s piping during operation and immediately after stopping the unit. * The sound of coolant flowing, which may be particularly noticeable for about 2 to 3 minutes after starting operation. * A sizzling sound during Heating operation, which is produced by the Automatic Defrosting operation.
M
msanchezSep 2, 2025
Why is my Fujitsu Air Conditioner emitting mist or steam?
- J
  Joseph SmithSep 3, 2025
  The emission of mist or steam from your Fujitsu Air Conditioner can be caused by: * During Cooling or Dry operation, a thin mist may be seen emitted from the indoor unit. This results from the sudden Cooling of room air by the air emitted from the air conditioner, resulting in condensation and misting. * During Heating operation, the outdoor unit’s fan may stop, and steam may be seen rising from the unit. This is due to the Automatic Defrosting operation.
E
Eric RichardsonSep 6, 2025
Why Fujitsu AST30 Air Conditioner doesn't operate immediately after turning it on?
- L
  Lawrence Chavez PhDSep 6, 2025
  Your Fujitsu Air Conditioner might not operate immediately because: * If the unit is stopped and then immediately started again, the compressor will not operate for about 3 minutes, in order to prevent fuse blowouts. * Whenever the electrical breaker is turned off then on again or the power supply plug is disconnected and then reconnected, the protection circuit will operate for about 3 minutes, preventing unit operation during that period.
T
Timothy AndersonSep 9, 2025
Why does my Fujitsu AST30 smell?
- B
  Brenda BellSep 10, 2025
  A smell emitted from your Fujitsu Air Conditioner's indoor unit may be the result of room smells (furniture, tobacco, etc.) which have been taken into the air conditioner.

Fujitsu AST30 SERIES Specifications

General

Brand	Fujitsu
Model	AST30 SERIES
Category	Air Conditioner
Language	English

Summary

Safety Precautions

Safety Definitions and Symbols

Explains the meaning of DANGER, WARNING, and CAUTION symbols used in the manual.

General Safety Guidelines

Provides crucial safety instructions for operating and maintaining the air conditioner.

Features and Functions

Operation Modes Overview

Details Automatic, Sleep Timer, and Quiet operation features.

Airflow and Control Features

Covers swing operation, remote control, and intake grille.

Filter Technology

Explains the mildew-resistant and air cleaning filters.

Name of Parts

Indoor Unit Components Identification

Illustrates and labels parts of the indoor unit and its control panel.

Remote Control Unit Identification

Illustrates and labels the wireless remote control unit and its display.

Test Run and Component Details

Continued Part Identification

Continues identification of indoor unit and remote control components.

Test Run Procedure

Explains how to perform a test run for installation purposes.

Preparation

Remote Control Battery Installation

Guides on loading batteries into the remote control unit.

Setting Current Time

Details the steps to set the current time on the remote control.

Remote Control Unit Holder

Instructions for mounting the remote control unit holder.

Operation

Selecting Operation Mode

How to start the unit and select modes like AUTO, COOL, DRY, HEAT, FAN.

Setting Temperature

How to adjust the thermostat setting for different models.

Setting Fan Speed

How to select fan speeds like AUTO, HIGH, MED, LOW, QUIET.

Operation Details

AUTO Mode Fan Behavior

Explains fan operation in AUTO mode for Heating, Cooling, and Fan modes.

QUIET Mode Operation

Describes the effects and limitations of super quiet operation.

Stopping Operation

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

Mode Operation Details

AUTO Changover Operation

Explains automatic mode selection for Heat & Cool and Cooling models.

Heating Mode Operation

How to use the unit for heating and potential defrost cycle interruptions.

Cooling and Dry Mode Operation

Guidance on using cooling and dry modes, including fan speed limitations.

Fan Mode Operation

How to use the unit solely for air circulation.

Timer Operations

Setting ON;OFF Timers

Steps to set a timer for turning the unit on or off.

Setting Program Timers

How to combine ON and OFF timers for a sequence.

Timer Operation Notes

Information on how timers affect operation start times and condition changes.

Sleep Timer and Manual Operation

Sleep Timer Functionality

How to set the sleep timer and its automatic temperature adjustment.

Manual Auto Operation

How to operate the unit using the main control panel when the remote is lost.

Adjusting Air Circulation Direction

Vertical Airflow Direction Control

How to adjust the UP/DOWN airflow direction using the remote.

Horizontal Airflow Direction Control

How to adjust the RIGHT/LEFT airflow direction using the remote.

Airflow Direction Safety Warnings

Warnings about inserting objects and manual adjustment of flaps.

Swing Operation

Vertical Swing Operation

How to activate and stop vertical airflow swing.

Horizontal Swing Operation

How to activate and stop horizontal airflow swing.

Swing Operation Guidelines

Notes on swing range, temporary stops, and condensation risks.

Cleaning and Care

Cleaning the Intake Grille

Step-by-step guide to remove and clean the intake grille.

Cleaning the Air Filter

Instructions for removing, cleaning, and replacing the air filter.

Air Filter Maintenance Frequency

Recommendation for cleaning air filters every two weeks.

Air Cleaning Filter

Air Cleaning Filter Installation

Guide to installing optional air cleaning filters.

Replacing Air Filters

How to replace existing dirty air filters with new ones.

Air Cleaning Filter Types and Care

Information on air-purifying and deodorizing filters and their maintenance.

Troubleshooting

Common Operation Issues

Addresses problems like unit not starting, noises, smells, and mist.

Airflow and Water Production Issues

Covers weak airflow, stopping, and water from the outdoor unit.

Troubleshooting and Operating Tips

Unit Not Operating or Poor Performance Checks

Checks for power, timer, filter, or temperature settings.

Unit Operating Differently Troubleshooting

Addresses unit behavior contrary to remote control settings.

Heating Performance and Defrosting

Explains heating principle and automatic defrosting.

Operating Tips

Multi-type Air Conditioner Usage

Guidance on operating multiple indoor units with one outdoor unit.

Simultaneous Unit Operation Modes

Explains compatible and incompatible operating modes for multiple units.

Heating Mode Notices

Information on defrost operation and indoor unit warmth.

Temperature and Humidity Ranges

Cooling Operation Range and Precautions

Permissible temperatures, humidity, and operational notes for cooling.

Heating Operation Range and Precautions

Permissible temperatures, humidity, and operational notes for heating.

Related product manuals

Fujitsu AST30 SERIES - User Manual

Table of Contents

Questions and Answers:

Fujitsu AST30 SERIES Specifications

Summary

Safety Precautions

Safety Definitions and Symbols

General Safety Guidelines

Features and Functions

Operation Modes Overview

Airflow and Control Features

Filter Technology

Name of Parts

Indoor Unit Components Identification

Remote Control Unit Identification

Test Run and Component Details

Continued Part Identification

Test Run Procedure

Preparation

Remote Control Battery Installation

Setting Current Time

Remote Control Unit Holder

Operation

Selecting Operation Mode

Setting Temperature

Setting Fan Speed

Operation Details

AUTO Mode Fan Behavior

QUIET Mode Operation

Stopping Operation

Mode Operation Details

AUTO Changover Operation

Heating Mode Operation

Cooling and Dry Mode Operation

Fan Mode Operation

Timer Operations

Setting ON;OFF Timers

Setting Program Timers

Timer Operation Notes

Sleep Timer and Manual Operation

Sleep Timer Functionality

Manual Auto Operation

Adjusting Air Circulation Direction

Vertical Airflow Direction Control

Horizontal Airflow Direction Control

Airflow Direction Safety Warnings

Swing Operation

Vertical Swing Operation

Horizontal Swing Operation

Swing Operation Guidelines

Cleaning and Care

Cleaning the Intake Grille

Cleaning the Air Filter

Air Filter Maintenance Frequency

Air Cleaning Filter

Air Cleaning Filter Installation

Replacing Air Filters

Air Cleaning Filter Types and Care

Troubleshooting

Common Operation Issues

Airflow and Water Production Issues

Troubleshooting and Operating Tips

Unit Not Operating or Poor Performance Checks

Unit Operating Differently Troubleshooting

Heating Performance and Defrosting

Operating Tips

Multi-type Air Conditioner Usage

Simultaneous Unit Operation Modes

Heating Mode Notices

Temperature and Humidity Ranges

Cooling Operation Range and Precautions

Heating Operation Range and Precautions

Related product manuals