Fujitsu AST18FBBJ - User Manual

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AIR CONDITIONER

WALL MOUNTED TYPE

KEEP THIS MANUAL

FOR FUTURE REFERENCE

FUJITSU GENERAL LIMITED

OPERATING MANUAL

Indoor Unit

AST18FB

AST18UB

AST24FB

AST24UB

AST30FB

AST30UB

Outdoor Unit

AOT18F

AOT18U

AOT24F

AOT24U

AOT30F

AOT30U

P/N9369993022

Table of Contents

Questions and Answers:

T
tomcaseySep 2, 2025
How to fix Fujitsu AST18FBBJ Air Conditioner that doesn’t operate immediately?
- J
  Joseph Gonzalez Jr.Sep 2, 2025
  If your Fujitsu Air Conditioner doesn’t operate immediately after being turned on, this could be because the compressor will not operate for about 3 minutes to prevent fuse blowouts. Also, the protection circuit will operate for about 3 minutes, preventing operation if the electrical breaker is turned off then on again, or if the power supply plug is disconnected and then reconnected.
J
John SanchezAug 31, 2025
What to do if Fujitsu Air Conditioner operates differently from remote control settings?
- K
  Kimberly GalvanAug 31, 2025
  If your Fujitsu Air Conditioner operates differently from the remote control's settings, check if the remote control batteries are dead or not loaded properly.
D
Dr. James RichardAug 29, 2025
Why doesn't my Fujitsu AST18FBBJ operate immediately?
- N
  Nicole HawkinsAug 29, 2025
  Your Fujitsu Air Conditioner might not operate immediately after being turned on due to a protection mechanism. If the unit is stopped and immediately restarted, the compressor won't operate for about 3 minutes to prevent fuse blowouts. Similarly, if the electrical breaker is turned off and on again, or the power supply is disconnected and reconnected, the protection circuit will prevent operation for about 3 minutes.
I
isalinasAug 27, 2025
Why is my Fujitsu AST18FBBJ Air Conditioner not responding to the remote control settings?
- S
  Stacy WalterAug 28, 2025
  If your Fujitsu Air Conditioner unit operates differently from the remote control's setting, the remote control unit’s batteries may be dead or not loaded properly. Check the batteries and ensure they are correctly installed.
M
Michael GarciaAug 26, 2025
Why is my Fujitsu AST18FBBJ not cooling (or heating) properly?
- M
  melendezvictoriaAug 26, 2025
  Poor cooling or heating performance in your Fujitsu Air Conditioner can stem from several causes. Check if the air filter is dirty, or if the air intake grille or outlet port are blocked. Ensure that the room temperature settings (thermostat) are correctly adjusted. Also, check for open windows or doors. If it is cooling operation and there is bright sunlight entering the room, close the curtains. Finally, consider if there are heating apparatus or computers inside the room, or too many people present.
B
Brittany TaylorAug 25, 2025
What to do if the Fujitsu Air Conditioner signal is not received after replacing remote batteries?
- S
  Scott StephensonAug 25, 2025
  If the signal isn't received after replacing the batteries in your Fujitsu Air Conditioner's remote control, ensure you're using signal code A. The unit may not respond if another signal code is selected.
D
Dr. Virginia GloverAug 22, 2025
Why is water coming from my Fujitsu Air Conditioner outdoor unit?
- R
  Rachael LindseyAug 22, 2025
  During heating operation, water may be produced from the outdoor unit of your Fujitsu Air Conditioner due to the automatic defrosting operation.

Fujitsu AST18FBBJ Specifications

General

Brand	Fujitsu
Model	AST18FBBJ
Category	Air Conditioner
Language	English

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