Fujitsu AST12, AST9, AST7 manual Troubleshooting, Symptom Problem

Page 17

TROUBLESHOOTING

Instructions relating to heating (*) are applicable only to “HEAT & COOL MODEL” (Reverse Cycle).

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

WARNING! Power Supply Plug or turn off the circuit breaker, 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 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 recon-

 

 

 

 

 

nected 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.

 

 

 

 

 

 

 

*● During Heating operation, a sizzling sound may be heard occa-

 

 

 

sionally.This sound is produced by the Automatic Defrosting op-

17

 

 

eration.

 

 

 

 

 

 

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.

 

 

 

 

 

 

 

*● During Heating operation, the outdoor unit’s fan may stop, and

 

 

 

steam may be seen rising from the unit. This is due to the Auto-

17

 

 

matic Defrosting operation.

 

 

 

 

 

 

Airflow is weak or stops:

*● When Heating operation is started, fan speed is temporarily very

 

 

 

low, to allow internal parts to warm up.

 

 

 

*● During Heating operation, if the room temperature rises above

 

 

the thermostat setting, the outdoor unit will stop, and the indoor

 

 

 

 

 

unit will operate at very low fan speed. If you wish to warm the

 

 

 

room further, set the thermostat to a higher setting.

 

 

 

 

 

 

 

*● During Heating operation, the unit will temporarily stop opera-

 

 

 

tion (between 7 and 15 minutes) as the Automatic Defrosting mode

17

 

 

operates. During the Automatic Defrosting operation, the OPERA-

 

 

 

 

 

TION indicator lamp will flash.

 

 

 

 

 

 

 

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

7

 

 

when the unit is monitoring the room’s temperature.

 

 

 

 

 

 

 

 

 

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

7

 

 

 

 

 

 

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

7

 

 

 

 

 

 

*● In case of Multi-type unit, if multiple units are operated in different

 

 

 

operation modes as shown below, the units operated afterward will

 

 

 

stop and the OPERATION indicator lamp (red) will flash.

18

 

 

Heating mode and cooling mode (or dry mode)

 

 

 

Heating mode and fan mode

 

 

 

 

 

 

Water is produced from

*● During Heating operation, water may be produced from the out-

17

 

the outdoor unit:

door unit due to the Automatic Defrosting operation.

 

 

 

 

 

 

16

Image 17
Contents Operating Manual Safety Precautions ContentsCooling Model Features and FunctionsHeat & Cool Model Reverse Cycle Heat & Cool Model Reverse Cycle Test RUN Timer Indicator Lamp greenTo Use the Remote Control Unit Press the Time Adjust button againRemote Control Unit Holder PreparationOperation To Select Mode Operation Press the START/STOP button JTo Set the Thermostat Press the SET TEMP. buttons F To Set the Fan Speed Press the FAN Control buttonWhen set to Quiet About Mode OperationTo Stop Operation Press the START/STOP button Fan Cooling ModelFan Auto Cooling ModelDry Set the desired times for OFF timer and on timer Timer OperationAbout the Program timer Will displayTo Change the Timer Settings Sleep Timer OperationAbout the Sleep timer During Heating operationTypes of Air flow Direction Setting Adjusting the Direction of AIR CirculationRight-Left Adjustment Adjust the Right-Left louvers Manual Auto Operation Swing OperationTo select Swing Operation Press the Swing Louver button L About Swing OperationCleaning and Care Air cleaning filter set Install the air cleaning filter set setInstall the two air filters and close the intake grille Maintenance of Deodorizing Filters Replacing dirty Air cleaning filtersReplace them by two new air cleaning filters Symptom Problem TroubleshootingAuto Restart Operating TipsOperation and Performance Simultaneous Use of Multiple Units Multi-type Air conditionerHeating Operation Temperature and Humidity RangeCooling Operation

AST7, AST9, AST12 specifications

Fujitsu has long been recognized as a leading provider of advanced servers and technology solutions, and among its various offerings, the AST series stands out. The AST12, AST9, and AST7 represent a range of high-performance servers designed to meet diverse business needs.

The Fujitsu AST12 is geared towards enterprises looking for robust performance in a compact design. It supports the latest generation of Intel processors, ensuring that users have access to powerful computing capabilities. One of its standout features is the scalable architecture, which allows businesses to expand their systems as their needs grow. The AST12 supports high memory capacities and features multiple storage options, including NVMe SSDs and traditional HDDs, enabling users to optimize their storage strategy. Additionally, the server is designed with advanced energy efficiency technologies, reducing operating costs while maintaining performance.

Moving on to the Fujitsu AST9, this version is tailored for mid-sized businesses that require a balance of performance and efficiency. The AST9 incorporates several virtualization features, making it an excellent choice for organizations looking to consolidate their workloads. With support for various operating systems and virtualization platforms, users can deploy applications seamlessly across their infrastructures. The AST9 is also equipped with enhanced security features, including hardware-based encryption and secure boot options, ensuring that data remains protected against evolving threats. Its management tools simplify system monitoring and maintenance, allowing for proactive management of resources.

The Fujitsu AST7, while the most compact of the series, does not compromise on performance. This server is ideal for smaller businesses or remote offices that require reliable computing solutions without the bulk of larger systems. The AST7 is designed for easy deployment and management, incorporating features that assist IT teams in maintaining optimal performance levels. It supports remote management, allowing administrators to monitor and troubleshoot systems without being physically present. The AST7 also emphasizes energy efficiency, ensuring that even small businesses can keep their operational costs low while benefiting from high-quality server technology.

In summary, the Fujitsu AST series—comprising the AST12, AST9, and AST7—provides a wide range of solutions tailored to meet various business needs. From high scalability and performance in the AST12 to the balanced efficiency of the AST9 and the compact design of the AST7, Fujitsu delivers versatile technology that caters to the modern enterprise's demands while ensuring reliability, security, and ease of management.