Fujitsu ASU18CL, AOU18CL operation manual Troubleshooting, Symptom Problem

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TROUBLESHOOTING

In the event of a malfunction (burning smell, etc.), immediately stop operation, disconnect the

WARNING! Power Supply Plug, and consult authorized service personnel.

Merely turning off the unit’s power switch will not completely disconnect the unit from the power source. Always be sure to disconnect the Power Supply Plug or turn off your circuit breaker to ensure that power is completely off.

Before requesting service, perform the following checks:

 

Symptom

Problem

See Page

 

 

 

 

NORMAL

Doesn’t operate immedi-

● If the unit is stopped and then immediately started again, the com-

 

FUNCTION

ately:

pressor will not operate for about 3 minutes, in order to prevent

 

 

 

fuse blowouts.

—

 

 

● 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.

 

 

 

 

 

 

Noise is heard:

● During operation and immediately after stopping the unit, 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 operation, a slight squeaking sound may be heard. This is

 

 

 

the result of minute expansion and contraction of the front cover

 

 

 

due to temperature changes.

 

 

 

 

 

 

Smells:

● Some smell may be emitted from the indoor unit. This smell is

—

 

 

the result of room smells (furniture, tobacco, etc.) which have

 

 

 

 

 

been taken into the air conditioner.

 

 

 

 

 

 

Mist or steam are

● During Cooling or Dry operation, a thin mist may be seen emitted

 

 

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.

 

 

 

 

 

 

Airflow is weak or stops:

● The fan may operate at very low speed during Dry operation or

5

 

 

when the unit is monitoring the room’s temperature.

 

 

 

 

 

 

 

 

 

● During SUPER QUIET operation, the fan will operate at very low

5

 

 

speed.

 

 

 

 

 

 

 

 

 

● In the monitor AUTO operation, the fan will operate at very low

5

 

 

speed.

 

 

 

 

 

 

 

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Contents Operating Manual Español Français EnglishContents Safety PrecautionsFiche Technique SpecificationsEspecificaciones Page Features and Functions InverterName of Parts Indoor Unit Operating Control Panel Fig Manual Auto buttonPreparation Operation To Stop Operation Press the START/STOP button Q About Mode OperationAbout Auto Changeover Operation Timer Operation About the Sleep Timer Sleep Timer OperationDuring Cooling/Dry operation Adjusting the Direction of AIR Circulation Vertical Air Direction Adjustment Press the SET button RRight-Left Adjustment Adjust the Right-Left louvers Types of Air flow Direction SettingSwing Operation Manual Auto OperationTo select Swing Operation Press the Swing button S To stop Swing Operation Press the Swing button S once againCleaning and Care Install the Air cleaning filter set set Install the two Air filters and close the Intake GrilleReplacing dirty Air cleaning filters Replace them by two new Air cleaning filtersTroubleshooting Symptom ProblemEvent of Power Interruption Symptom Items to checkOperating Tips Auto RestartTemperature and Humidity Range Cooling Mode Dry Mode Outdoor temperatureIndoor temperature About 64 F to 90 F Tips for saving energy05M1509315255020-01En 2005.12.15

ASU18CL, AOU18CL specifications

Fujitsu has long been a leader in the HVAC industry, providing efficient and reliable air conditioning solutions. Among its notable offerings are the Fujitsu ASU18CL and AOU18CL models. These indoor and outdoor units, respectively, are designed to deliver powerful cooling and heating performance, making them suitable for a wide range of applications in residential and light commercial settings.

The ASU18CL indoor unit boasts an impressive cooling capacity of 18,000 BTUs, ensuring sufficient airflow even during the hottest months of the year. Designed with user comfort in mind, it features a sleek and modern aesthetic that can seamlessly integrate into various interior designs. The unit is equipped with an advanced multi-stage filtration system, which helps to improve indoor air quality by removing dust, allergens, and other airborne particles.

One of the standout features of the ASU18CL is its inverter technology. This technology allows the system to adjust its compressor speed according to the ambient temperature, resulting in more consistent temperatures and enhanced energy efficiency. As a result, users can expect lower energy bills while benefiting from reliable performance. The unit operates quietly, making it ideal for bedrooms, offices, and other quiet spaces.

On the outdoor side, the AOU18CL complements the ASU18CL with its durable construction and efficient performance. Designed to withstand varying weather conditions, the outdoor unit features a robust cabinet that protects the internal components from the elements. It too utilizes inverter technology, enhancing the overall efficiency of the system.

Both the ASU18CL and AOU18CL units are equipped with user-friendly controls, allowing for easy temperature adjustments and system settings. Additionally, these models are compatible with advanced remote control options, enabling users to manage their climate settings remotely.

Energy Star rated, these units comply with stringent energy efficiency standards. The combination of high efficiency and eco-friendly refrigerant reduces their environmental impact. They are also designed for easy installation and maintenance, ensuring that both homeowners and professionals can enjoy a hassle-free experience.

In summary, the Fujitsu ASU18CL and AOU18CL units combine advanced technology with practical features. Their inverter technology, energy efficiency, and user-friendly controls make them ideal choices for those seeking reliable air conditioning solutions that enhance comfort while being mindful of energy usage and the environment.
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