Fujitsu AOTR18LCC User Manual

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KEEP THIS OPERATION MANUAL

FOR FUTURE REFERENCE

FUJITSU GENERAL LIMITED

OPERATING MANUAL

P/N9315161024-01

Indoor Unit

ASTA18LCC

Outdoor Unit

AOTR18LCC

HEAT & COOL MODEL

(REVERSE CYCLE)

ROOM AIR CONDITIONER

WALL MOUNTED TYPE

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.

Table of Contents

Questions and Answers:

C
Christy MorrisonAug 15, 2025
Why is my Fujitsu AOTR18LCC Air Conditioner cooling poorly?
- G
  Gregory LeeAug 15, 2025
  Several factors can cause poor cooling performance in your Fujitsu Air Conditioner. Check if the air filter is dirty, or if the air conditioner’s intake grille or outlet port is blocked. Make sure the room temperature settings (thermostat) are correctly adjusted. Ensure no windows or doors are open. If it's a Cooling operation, close the curtains if bright sunlight enters through a window. Also, consider if there are heating appliances, computers, or too many people in the room. Finally, check if the unit is set for SUPER QUIET operation.
J
Jose ArnoldAug 18, 2025
What to do if my Fujitsu AOTR18LCC doesn't operate at all?
- J
  Joshua MarshallAug 18, 2025
  If your Fujitsu Air Conditioner isn't operating, first check if the Power Supply Plug is disconnected from its outlet. Also, verify if there has been a power failure. Inspect whether a fuse has blown out, or a circuit breaker has been tripped. Finally, check if the timer is operating.
R
Roberta RhodesAug 21, 2025
How to fix a Fujitsu Air Conditioner that doesn’t operate immediately?
- G
  Gary WallaceAug 22, 2025
  If the 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.
J
John NewmanAug 25, 2025
Why does the Fujitsu AOTR18LCC airflow become weak or stop?
- W
  William YoungAug 26, 2025
  There are several reasons why the airflow of your Fujitsu Air Conditioner might weaken or stop. When heating starts, the fan speed is temporarily very low to allow internal parts to warm up. Also, during heating, if the room temperature rises above the thermostat setting, the outdoor unit will stop, and the indoor unit will operate at a very low fan speed. The unit will temporarily stop operation (between 7 and 15 minutes) during heating as the Automatic Defrosting mode operates. The fan may operate at a very low speed during Dry operation or when the unit monitors the room’s temperature. The fan will operate at a very low speed during SUPER QUIET operation or in monitor AUTO operation.
M
Maria SaundersAug 28, 2025
What to do if Fujitsu AOTR18LCC operates differently from the Remote Control Unit’s setting?
- G
  Gabrielle CarrollAug 28, 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 or if they are loaded properly.
R
raymond48Aug 31, 2025
Why is water being produced from the outdoor unit of my Fujitsu Air Conditioner?
- J
  joseph88Aug 31, 2025
  During Heating operation, water may be produced from the outdoor unit due to Automatic Defrosting operation.
S
stephaniedunlapSep 4, 2025
Why is there noise coming from my Fujitsu AOTR18LCC?
- I
  Ian CollinsSep 4, 2025
  During operation, and immediately after stopping the unit, you might hear the sound of water flowing in the air conditioner’s piping. Noise may also be particularly noticeable for about 2 to 3 minutes after starting operation due to the sound of coolant flowing. During Heating operation, a sizzling sound may be heard occasionally, which is produced by the Automatic Defrosting operation.
L
Lisa NguyenSep 7, 2025
Why is my Fujitsu Air Conditioner emitting mist or steam?
- K
  Kara HortonSep 7, 2025
  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, leading to condensation and misting. During Heating operation, the outdoor unit’s fan may stop, and steam may rise from the unit due to Automatic Defrosting operation.
S
Samuel Hamilton IVSep 12, 2025
Why does my Fujitsu AOTR18LCC Air Conditioner smell?
- A
  autumn16Sep 12, 2025
  A smell may be emitted from the indoor unit because room smells (furniture, tobacco, etc.) have been taken into the air conditioner.

Fujitsu AOTR18LCC Specifications

General

Brand	Fujitsu
Model	AOTR18LCC
Category	Air Conditioner
Language	English

Summary

Safety Precautions

DANGER! Warnings

Critical safety warnings requiring immediate attention.

CAUTION! Advice

Important safety advice to prevent damage or injury.

Preparation and Initial Setup

Power and Battery Installation

Connecting power and loading remote control batteries.

Setting the Current Time

Operating the Air Conditioner

Selecting Operation Modes

How to choose COOL, DRY, HEAT, or FAN modes.

Adjusting Thermostat and Fan Speed

Setting desired temperature and airflow speed.

Advanced Operation and Modes

Stopping and Auto Changeover

Procedures to stop operation and details of auto changeover.

Mode Specific Operations

Timer Functions

ON/OFF and Program Timers

Sleep Timer Function

Using the Sleep Timer

Troubleshooting Symptoms

Operation and Noise Issues

Resolving issues like no operation or unusual noises.

Smell, Mist, and Airflow Issues

Addressing odors, mist, and weak airflow problems.

Troubleshooting Performance and Tips

Performance and Operation Checks

Checks for poor cooling, incorrect operation, and power issues.

Heating and Defrosting Tips

Auto Restart Feature

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