Fujitsu ASTG18LVCB User Manual

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OPERATING MANUAL

P/N9318657005

ROOM AIR CONDITIONER

WALL MOUNTED TYPE

KEEP THIS MANUAL FOR FUTURE REFERENCE

R410A

REFRIGERANT

This Air Conditioner contains and operates

with refrigerant R410A and Polyol Ester oil.

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.

English

Table of Contents

Questions and Answers:

A
Aaron CurryAug 13, 2025
Why is my Fujitsu Air Conditioner not cooling well?
- W
  William YoungAug 13, 2025
  Several factors can impact the cooling or heating performance of your Fujitsu Air Conditioner. Make sure that the air filter is clean and that the air conditioner's intake grille or outlet port isn't blocked. Check if the room temperature settings (thermostat) are correctly adjusted and that no windows or doors are open. If it's cooling operation, ensure bright sunlight isn't entering the room (close the curtains) and that there aren't excessive heat sources like heating apparatus or too many people in the room. Also, verify the unit isn't set for QUIET operation.
G
Gregory MccartyAug 17, 2025
Why is my Fujitsu Air Conditioner airflow weak or stops?
- A
  Alexa SalinasAug 17, 2025
  Weak or stopped airflow in your Fujitsu Air Conditioner can occur for several reasons. When heating starts, the fan speed is temporarily low to warm up internal parts. During heating, if the room temperature exceeds the thermostat setting, the outdoor unit stops, and the indoor unit operates at a very low fan speed. The unit may also temporarily stop during heating for 7-15 minutes for Automatic Defrosting. In Dry mode, the fan operates at low speed and may stop to adjust humidity. SUPER QUIET operation also uses very low fan speed. In AUTO mode, the fan runs at a very low speed. For Multi-type units, operation in different modes can cause units to stop, indicated by a flashing OPERATION lamp.
J
Jordan SchwartzAug 21, 2025
Why doesn't my Fujitsu ASTG18LVCB Air Conditioner operate immediately?
- K
  Keith LaneAug 21, 2025
  If the indoor unit is stopped and immediately restarted, the compressor won't operate for about 3 minutes to prevent fuse blowouts. Also, when the electrical breaker is turned off and on again, the protection circuit operates for about 3 minutes, preventing operation.
H
harrisjacquelineAug 25, 2025
Why is water produced from the outdoor unit of my Fujitsu Air Conditioner?
- A
  andersonmatthewAug 26, 2025
  Water may be produced from the outdoor unit of your Fujitsu Air Conditioner during Heating operation due to Automatic Defrosting.
C
christopherstewartAug 29, 2025
What to do if my Fujitsu ASTG18LVCB doesn't operate at all?
- A
  Ashley PetersenAug 29, 2025
  If your Fujitsu Air Conditioner isn't operating, check if the circuit breaker has been turned off or if there has been a power failure. Also, verify if a fuse has blown out or a circuit breaker has been tripped, and ensure the timer isn't operating.
A
Amber HarrisSep 1, 2025
Why does my Fujitsu ASTG18LVCB Air Conditioner smell?
- K
  Karen GoodmanSep 1, 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.
A
alexkennedySep 5, 2025
Why is mist or steam emitted from my Fujitsu Air Conditioner?
- J
  jessica64Sep 5, 2025
  During Cooling or Dry operation, a thin mist from the Fujitsu Air Conditioner indoor unit results from the sudden cooling of room air, causing condensation. During Heating, steam from the outdoor unit occurs during Automatic Defrosting operation, when the fan may stop.

Fujitsu ASTG18LVCB Specifications

General

Brand	Fujitsu
Model	ASTG18LVCB
Category	Air Conditioner
Language	English

Summary

Safety Precautions

Features and Functions

Inverter

High power initially, then low power for economy and comfort.

10°C Heat Operation

Maintains room temperature at 10°C to prevent it from falling too low.

Economy Operation

Saves energy by slightly adjusting temperature, making it higher in cooling, lower in heating.

Preparation

Operation

To Select Mode Operation

Instructions on how to select the desired operating mode (AUTO, COOL, DRY, FAN, HEAT).

To Set the Thermostat

Guide on adjusting the temperature setting using the remote control buttons.

To Set the Fan Speed

How to change the fan speed settings (AUTO, HIGH, MED, LOW, QUIET).

Timer Operation

To Use the ON Timer or OFF Timer

Steps to set a timer to turn the unit on or off at a specific time.

Adjusting the Direction of Air Circulation

Vertical Airflow Direction Adjustment

How to adjust vertical airflow direction using the remote control's SET button.

Right-Left Adjustment

10°C Heat Operation

To Use 10°C HEAT OPERATION

Economy Operation

To Use the ECONOMY Operation

Cleaning and Care

Cleaning the Air Filter

Step-by-step guide to cleaning the air filters.

Troubleshooting

Normal Function

Checks for issues when the unit does not operate immediately or makes noise.

Smells

Mist or Steam is Emitted

Airflow is Weak or Stops

Diagnosing weak or stopped airflow issues.

Water is Produced from the Outdoor Unit

Doesn't Operate at All

Checks for circuit breaker, power failure, or timer issues.

Poor Cooling (or Heating) Performance

Troubleshooting low cooling or heating performance.

The Unit Operates Differently from the Remote Controller's Setting

Diagnosing discrepancies between unit operation and remote settings.

Operating Tips

Microcomputer-controlled Automatic Defrosting

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