Fujitsu Asth07knca Comfort Single Room Solutions Instruction Manual

Fujitsu Asth07knca Comfort Single Room Solutions Instruction Manual

FUJITSU logoOPERATION MANUAL
AIR CONDITIONER (Wall Mounted type)FUJITSU ASTH07KNCA Comfort Single Room SolutionsMODEL:
ASTH07KNCA/ASTH09KNCA
ASTH12KNCA/ASTH14KNCA

ASTH07KNCA Comfort Single Room Solutions

* Check the model name.
(Refer to the rating label.)
Before using this product, read these instructions thoroughly and keep this manual for future reference.
Warning icon CAUTION
R32

REFRIGERANT
This Air Conditioner contains and operates with refrigerant R32.
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 or service of this product.

SAFETY PRECAUTIONS

To prevent personal injury or property damage, read this section carefully before you use this product, and be sure to comply with the following safety precautions.
Incorrect operation due to failure to follow the instructions may  cause harm or damage, the seriousness of which is classified  as follows:
Warning icon WARNING
This mark warns of death or serious injury.
Warning icon CAUTION
This mark warns of injury or damage to property.
FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon This mark denotes an action that is PROHIBITED.
FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon1 This mark denotes an action that is COMPULSORY.
Explanation of symbols displayed on the indoor unit or outdoor unit.
FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon2 WARNING
This symbol shows that this product uses a low burning velocity material. If the refrigerant is leaked and exposed to an external ignition source, there is a risk of fire.
Read ICON CAUTION
This symbol shows that the operation manual should be read carefully.
FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon3 CAUTION
This symbol shows that a service personnel should be handling this equipment with reference to the installation manual.
read this guide CAUTION
This symbol shows that information is available such as the operating manual or installation manual.
Warning icon WARNING

  • FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon1 When installing this product to an ventilated area, pay attention to prevent fire and explosion caused by the stagnated gas in case of refrigerant leakage. (For products which contain more than 1.842 kg refrigerant.)
  • This product contains no user-serviceable parts. Always consult authorized service personnel for repairing, installation, and relocation of this product. Improper installation or handling will cause leakage, electric shock, or fire.
  • In the event of a malfunction such as burning smell, immediately stop operation of the air conditioner, and disconnect all the power supply by turning off the electrical breaker or disconnecting the power plug. Then consult authorized service personnel.
  • Take care not to damage the power supply cable. If it is damaged, it should be replaced only by authorized service personnel in order to avoid a hazard.
  • If a refrigerant leakage is suspected, all naked flames shall be removed or extinguished, and consult authorized service personnel.
  • In the event of a thunder storm or any prior sign of a lightning strike, turn off the air conditioner via the remote controller, and refrain from touching the product or the power source to prevent any electrical hazards.
  • This product shall be stored in a room without continuously operating ignition sources (for example: open flames, an operating gas appliance or an operating electric heater).
  • This product shall be stored in a well-ventilated area.
  • Be aware that refrigerants may not contain an odor.
  • This product shall be stored so as to prevent mechanical damage from occurring.
  • Disposing of the product shall be done properly, in compliance with national or regional regulations.
  • During transportation or relocation of the indoor unit, pipes shall be covered with the wall hook bracket for protection. Do not move this product by holding the indoor unit pipes. (The stress applied to the pipe joints may cause the flammable gas to leak during operation).
  • This product is not intended for use by persons (including children)

Warning icon WARNING

  • FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon Do not start or stop the operation of this product by inserting or pulling out the power plug, or by turning on or off the circuit breaker.
  • Do not use flammable gases near this product.
  • Do not expose yourself directly to the cooling airflow for many hours.
  • Do not insert your fingers or any other objects into the outlet port or intake grille.
  • Do not operate with wet hands.
  • Do not use means to accelerate the defrosting process or to clean this product, other than those instructed in this manual.
  • Do not pierce or burn.

Warning icon CAUTION

  • FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon1 Provide occasional ventilation during use.
  • Before cleaning this product, be sure to turn it off and disconnect all the power supply.
  • Always operate this product with air filters installed.
  • Ensure that any electronic equipment is at least 1 m (40 in) away from this product.
  • Disconnect all the power supply when not using this product for extended periods.
  • After a long period of use, ensure to get the mounting  of the indoor unit checked to prevent this product from falling down.
  • The airflow direction and the room temperature should be carefully considered when you use this product in a room with infants, children, elderly or sick persons.
  • Keep the surroundings of the outdoor unit clean and tidy, and do not place items around it. Any objects blocking or entering from the outlet ports may cause product malfunction.
  • FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon Do not direct the airflow at fireplaces or heating apparatus.
  • Do not block or cover the intake grille and the outlet port.
  • Do not apply any heavy pressure to radiator fins.
  • Do not climb on, place objects on, or hang objects from this product.
  • Do not place any other electrical products or household belongings under this product. Dripping condensation from this product might get them wet, and may cause damage or malfunction of your property.
  • Do not expose this product directly to water.
  • Do not use this product for preservation of food, plants, animals, precision equipment, art work, or other objects. This may cause quality deterioration of those items.
  • Do not expose animals or plants to the direct airflow.
  • Do not drink the drainage from the air conditioner.
  • Do not pull the power supply cable.
  • Do not touch the aluminum fins of heat exchange built-in this product to avoid personal injury when you maintain the unit.
  • Do not stand on unstable steps when operating or cleaning this product. It may overturn and can cause injury.

This product contains fluoridated greenhouse gases.

PREPARATION

Warning icon WARNING

  • FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon1 Take care to prevent infants and young children from  accidentally swallowing the batteries.

CAUTION

  • FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon1 If leaking battery fluid comes in contact with your skin, eyes, or mouth, immediately rinse with plenty of clean water, and consult your physician.
  • Exhausted batteries must be removed immediately, and be disposed according to the local laws and regulations of your region.
  • FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon Do not attempt to recharge dry batteries.
  • Do not use dry batteries that has been recharged.

Indoor unit accessories
Check that the following accessories are included.

FUJITSU ASTH07KNCA Comfort Single Room Solutions - unit accessories

Remote controller holder installation

FUJITSU ASTH07KNCA Comfort Single Room Solutions - Remote controller

2.1. Inserting batteries
Battery type: R03/LR03/AAA × 2

FUJITSU ASTH07KNCA Comfort Single Room Solutions - batteries

1~3. Put batteries as shown in the figure above.
4. PressFUJITSU ASTH07KNCA Comfort Single Room Solutions - icon19 as shown in the figure above.
NOTES:

  • Use specified type of batteries only.
  • Do not mix different types or new and used batteries together.
  • Batteries can be used about 1 year in ordinary use.
  • If the remote control range noticeably shortens, replace the batteries, and pressFUJITSU ASTH07KNCA Comfort Single Room Solutions - icon19as shown in the figure above.

NAME OF PARTS

Warning icon CAUTION
For appropriate signal transmission between the remote controller and the indoor unit, keep the signal receiver away from the following items:

  • Direct sunlight or other strong lights
  • Flat-panel television screen

In rooms with instantaneous fluorescent lights, such as inverter type ones, the signal may not be transmitted properly. In such a case, consult the store of purchase.
3.1. Indoor unit
For Manual Auto operation and Filter indicator reset (Refer to page 10.)

FUJITSU ASTH07KNCA Comfort Single Room Solutions - PARTS

  1.  Before starting operation, make sure that the intake grille is closed completely. Incomplete closing may affect the proper function or performance of the product.
  2. Indicator lamps light in the following conditions.
NameColorOperation or condition
FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon4OperationGreenNormal operation
FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon5TimerOrangeTimer operation
FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon6EconomyGreenEconomy operation

3.2. Remote controller
Warning icon CAUTION

  • FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon1 To prevent malfunction or damage of the remote  controller:
    – Place remote controller at where will not be exposed to direct sunlight or excessive heat.
    – Remove batteries if the product is not going to be used for an extended period.
  • Obstacles such as a curtain or wall between the remote controller and the indoor unit may affect the appropriate signal transmission.
  • FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon Do not apply strong shocks to the remote controller.
  • Do not pour water on the remote controller.

When you use the optional remote controller, the appearance and the operation procedure may differ.
For details, refer to the operation manual of each remote controller.

FUJITSU ASTH07KNCA Comfort Single Room Solutions - PARTS1

BASIC OPERATIONS

3 steps to start operation

  1. PressPower button/ to start or stop the operation.
  2. Press MODE to select the operation mode. The operation mode changes as follows.FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon7
  3. Press to set the desired temperature.
    The temperature changes by 0.5 °C increments.
Temperature setting range
Auto/Cooling/Dry18.0-30.0 °C
Heating16.0-30.0 °C

NOTES:

  • In the Cooling or Dry mode, set the temperature lower than the current room temperature.
  • In the Heating mode,
    – set the temperature higher than the current room temperature.
    – at the beginning of the operation, the indoor unit fan rotates at very low speed for 3-5 minutes.
    – the Automatic defrosting operation overrides the Heating operation when necessary.
  • In the Fan mode, temperature control is not available.

AIRFLOW SETTINGS

5.1. Fan speed setting
FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon8 Press FAN SPEED to control the fan speed.
The fan speed changes as follows.

FUJITSU ASTH07KNCA Comfort Single Room Solutions - speed

When AUTO is selected, the fan speed depends on the operating condition.
NOTE: In the Dry mode, the fan speed is fixed to AUTO.
5.2. Airflow  direction setting
For details of the airflow ranges, refer to “Airflow direction  range”.
Up/down airflow direction setting
FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon8 Press FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon9 to adjust the up/down airflow direction.
 Left/right airflow direction setting
Warning icon CAUTION
Before you adjust the left/right airflow direction, make sure that the horizontal louver has been stopped completely.
FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon8Adjust two knobs of the vertical louvers by hand.
Swing operation setting
FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon8Press SWING to start/stop the Swing operation.
NOTE: The Swing operation may stop temporarily when the indoor unit fan is rotating at very low speed or is stopped
Air flow direction range
Up/down air flow direction

FUJITSU ASTH07KNCA Comfort Single Room Solutions - airfl ow

* The Swing operation range depends on the airflow direction set before the Swing operation.
NOTES:

  • Do not adjust the horizontal louvers by hand.
  • In the Auto or Heating mode, the airflow direction stay position 1 for a while from the start of the operation.
  • In the Cooling or Dry mode, the downward airflow can change to the upper as follows. This feature is to prevent condensation from dripping and damaging your property.

Condition: Position 4-6 keeps for 30 minutes
Airflow adjusted to: Position 3

TIMER OPERATIONS

NOTE: When [ FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon5] indicator on the indoor unit blinks, set the clock and timer again. This blinking shows that the internal clock goes wrong due to an interruption of the power supply.

  1.  Press FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon5TIMER to choose timer operation.
    Each time you press the button, the timer operation will change as follows: FUJITSU ASTH07KNCA Comfort Single Room Solutions - setting
Off timerStops the operation at your desired time.
on timerStarts the operation at your desired time.
Program timerOperates as the combination of the On timer and Off timer.
  • To cancel the timer setting during the procedure, pressFUJITSU ASTH07KNCA Comfort Single Room Solutions - icon5 CANCEL
  • To set sleep timer, press ®SLEEP. (Refer to “6.3. Sleep timer”.)

Set each timer operation.
For details, refer to the following instructions of each timer  setting.
6.1.  On timer or Off timer

  1. Select On timer or Off timer in step 1 of “Timer setting procedure.”
  2. Each time you press the time changes as follows:

FUJITSU ASTH07KNCA Comfort Single Room Solutions - time changes

+ When you use the On timer, set the time while the ON indicator on the remote controller display is blinking
+ When you use the Off timer, set the time while the OFF indicator on the remote controller display is blinking
« To deactivate the On/Off timer, press FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon5CANCEL while  [ FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon5ON] or  [FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon5OFF ] is shown on the remote controller display. The indicator wile disappear.
NOTE:
If you set the Sleep timer after setting the On/Off timer, the: On/Off timer is canceled
6.2. Program timer

  1.  Set On timer and Off timer. (Refer to “6.1. On timer or Off timer™.)
  2. Select Program timer in step 1 of “Timer setting procedure”.
    After the time set by the earlier timer passed, the timer set later will begin the counting down The order of the timer operation is displayed as follows:
TimerIndicator on the remote controller display
Off→0n timerFUJITSU ASTH07KNCA Comfort Single Room Solutions - icon12
On→Off timerFUJITSU ASTH07KNCA Comfort Single Room Solutions - icon13

NOTE: If you set the Sleep timer after setting the Program timer, the Program timer is canceled
6.3 Sleep timer
The Sleep timer supports your comfortable sleep by moderating the air conditioner operation gradually.
FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon8 Press FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon5SLEEP.
Each time you press the button, the time changes as follows: 

FUJITSU ASTH07KNCA Comfort Single Room Solutions - Sleep timer

To repeat the timer, press the button whenFUJITSU ASTH07KNCA Comfort Single Room Solutions - icon14 indicator is not  displayed
During the Sleep timer operation, the setting temperature changes as the following figure:

FUJITSU ASTH07KNCA Comfort Single Room Solutions - figure

After the set time has elapsed, the air conditioner operation turns off.

ENERGY SAVING OPERATIONS

It saves more electricity than other operation modes by changing the set temperature to a moderate setting
FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon8 Press (FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon6ECONOMY to activate/deactivate the Economy  operation.
[FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon6 ] indicator on the indoor unit will turn on.

Operation  modeRoom temperature
Cooling/DryFew degrees higher than the set temperature
HeatingFew degrees lower than the set temperature

NOTES:

  • In the Cooling, Heating, o Dry mode, the maximum output of this operation is approximately 70 % of usual operation.
  • This operation cannot be performed during the temperature monitoring by the Auto mode.

7.2. Fan control for energy saving

In the Cooling operation, when the room temperature reaches the set temperature, the indoor unit fan rotates intermittently to save the power. (This function is deactivated at  the time of purchase.)
To change the setting, use the following steps;

FUJITSU ASTH07KNCA Comfort Single Room Solutions - energy saving

  1. Press ¢/| until the indicators on the remote controller turn off.
  2. Press and hold FAN SPEED for more than 5 seconds.
    TheFUJITSU ASTH07KNCA Comfort Single Room Solutions - icon17 and the current status will appear.
    ON : Activated
    OFF : Deactivated
  3. Press to switch the status.
  4. Press ¢/Ito send the setting to the indoor unit.
    The display will return to the original screen.

NOTE: If you do not press any buttons for 30 seconds after FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon17 is  displayed, FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon17 will turn off. In this case, repeat the setting from step 2

7.3. Demand Response
This product is designed to be compatible with Air Conditioning Demand Response program
To utilize the function, you need a separate arrangement  with your  electricity supplier. Please check availability in the place of use
When your electricity supplier activates one of the following 3 Demand
Response (DR) modes, the air conditioner switches over to the appropriate operation
During the DR mode, [|] indicator on the indoor unit will blink
Blinking pattern and the intervals are as follows:

Operation modeIndicator lamp blinking pattern
Auto/Cooling/Heating/Dry/FanFUJITSU ASTH07KNCA Comfort Single Room Solutions - icon15

‘When the DR mode finishes, the air conditioner returns to the operation set before entering the DR mode.
M Details on Demand Response mode 

DR modeDescription of operation in this mode
DR mode 1Compressor off
DR mode 2Electrical energy consumption in 30 minutes: 50 % or less (compared with rated energy consumption)
DR mode 3Electrical energy consumption in 30 minutes:  75% or less (compared with rated energy consumption)

NOTES:

  • During the DR mode, the cooling or heating performance may be reduced
    During the DR mode, only the following operations are valid
    – Turing off the operation by (Power button/|
    – Off timer operation
  • The Powerful operation is performed within the operable range of the DR mode
  • During the DR mode, the Filter sign will not display
  • Timer setting error indicator wile be prioritized over the DR mode indicator.

If you have operational issues:

  1. Contact your electricity supplier to check whether they are activating the DR mode
  2. Is the air conditioner under the Demand controlling?

FUJITSU ASTH07KNCA Comfort Single Room Solutions - Demand controlling

OTHER OPERATION

In the Powerful operation, the air conditioner will operate at maximum  power and strong airflow to cool down or warm up the room quickly.
FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon8 Press POWERFUL to activate/deactivate the Powerful operation.
When activated, the indoor unit will emit 2 short beeps.
When deactivated, the indoor unit will emit 1 short beep.
The Powerful operation will be muted off automatically in the following situations:

  • The Powerful operation runs for a certain amount of time and the room temperature reaches the set temperature in the Cooling, Dry, or Heating mode:
  • 20 minutes after the Powerful operation has started

NOTES:

  • The airflow direction and the fan speed are controlled automatically.
  • The Powerful operation cannot be performed simultaneously with Economy operation.
  • If the wired remote controller (optional) is connected, this function is restricted

SETTINGS ON INSTALLATION

9.1. Remote controller custom code setting
By setting custom code of indoor unit and remote controller, you can specify the air conditioner which the remote controller controls. When two or more air conditioners are in the room and you wish to operate them separately, set the custom code (4 selections possible).
NOTE: If custom codes are different between the indoor unit and the remote controller, the indoor unit cannot receive a signal from the remote controller.
How to set the remote controller custom code

  1. Press Power button/I until the indicators on the remote controller turn  off.
  2. Press down MODE for more than 5 seconds.
    The current custom code will be displayed (initially set to A).
  3. Pressto change the custom code between
    A(A) B (5) « C () =D (o). FUJITSU ASTH07KNCA Comfort Single Room Solutions - energy saving1* Match the custom code on the display to the air conditioner custom code.
  4. Press MODE again.
    The custom code will be set.
    The display will return to the original display.
  • To change the air conditioner custom code, contact authorized service personnel (initially set to A).
  • If you do not press any buttons for 30 seconds after the custom code is displayed, the displayed custom code is set and the display returns to the original display.
  • Depending on the remote controller, the custom code may return to A when replacing the batteries. In this case, reset the custom code as necessary. If you do not know the air conditioner custom code, try each code until you find the code which operates the air conditioner.

CLEANING AND CARE

CAUTION

FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon1 Before cleaning this product, be sure to turn it off and disconnect all the power supply.
• Before starting operation, make sure that the intake grille has been shut completely. Incomplete closing of the intake grille might have an effect on the proper working or performance of the air conditioner.
• If the filter cleaning involves high-place work, consult the authorized service personnel.
FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon Do not touch the aluminum fins of heat exchange built-in the indoor unit to avoid personal injury when you maintain the unit.
• Do not expose the indoor unit to liquid insecticides or hair sprays.
• Do not stand on slippery, uneven or unstable surfaces when you maintain the unit.

FUJITSU ASTH07KNCA Comfort Single Room Solutions - unit1

The frequency of the cleaning is as shown in the following table.

What to doFrequency
Cleaning indoor unit bodyWhen you notice
Cleaning air filterEvery 2 weeks

Cleaning indoor unit body
NOTES:

  • Do not use water hotter than 40 °C.
  • Do not use scouring cleanser, volatile solvents such as benzene or thinner.
  1. Wipe the indoor unit body gently with a soft cloth moisten with warm water.
  2. Wipe the indoor unit body gently with a dry and soft cloth.

Cleaning air filter

  1. Open the intake grille.FUJITSU ASTH07KNCA Comfort Single Room Solutions - filter
  2. Remove the air filters.
    Lift up the air filters’ handle, disconnect the two lower tabs, and pull out.FUJITSU ASTH07KNCA Comfort Single Room Solutions - filter1
  3. Remove the dust in either of the following ways.
    • Cleaning with vacuum cleaner.
    • Washing with mild detergent and warm water. After washing, dry the air filters thoroughly in shade.
  4. Replace the air filters.
    Align the sides of the air filter with the panel, and push in fully. Make sure to the two lower tabs are returned to their holes in the indoor unit properly.
  5. Close the intake grille.
    Press 4 places on the intake grille to close it completely.FUJITSU ASTH07KNCA Comfort Single Room Solutions - grille

NOTE: If dirt accumulates on the air filter, airflow will be reduced, operating efficiency will lower, and the noise will increase.
Removing and installing intake grille
Removing intake grille

  1. Open the intake grille.
  2. While pressing the left and right mounting shafts outward gently, pull the intake grille.

FUJITSU ASTH07KNCA Comfort Single Room Solutions - grille1

Installing intake grille

  1. While holding the intake grille horizontal, set the left and right mounting shafts into the pillow blocks at the top of the front panel. Insert the shaft until it snaps to latch each shaft properly.
  2. Close the intake grille.
  3. Press 4 places on the intake grille to close it completely.

FUJITSU ASTH07KNCA Comfort Single Room Solutions - grille2

After extended non-use of the unit
If you have shut down the indoor unit for 1 month or more, perform the Fan mode operation for half a day to dry the internal parts thoroughly before the normal operation.
Additional inspection
After long period of use, accumulated dust inside the indoor unit may reduce the performance even if you have maintained the unit properly.
In such a case, a product inspection is recommended.
For more information, consult authorized service personnel.
Filter indicator reset (Special setting)
This function can be used if set correctly during installation. Consult authorized service personnel in order to use this function.
FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon8 Clean the air filter when the indicator lamp shows the following:

Indicator lampBlinking pattern
FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon6Blinks 3 times, at intervals of 21 seconds

After cleaning, reset the filter indicator by pushing FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon18on the indoor unit  for 2 seconds or less. (Refer to page 3.)

  • Heating performance
    This air conditioner operates on the heat-pump principle, absorbing heat from air outdoors and transferring that heat to the indoor unit. As a result, the operating performance is reduced as outdoor air temperature drops.
    If you feel that the heating performance is insufficient, we recommend you to use this air conditioner in conjunction with other kinds of heating appliance.
  • Automatic defrosting operation
    When outdoor temperature is very low with high humidity, frost may form on the outdoor unit during the heating operation, and it could reduce the operating performance of the product.
    For frost protection, an automatic defrost function is equipped in this air conditioner.
    If frost forms, the air conditioner will temporarily stop, and defrost circuit will operate briefly (maximum of 15 minutes.)
    [ I] indicator on the indoor unit blinks during this operation.
    If frost forms on the outdoor unit after the Heating operation, the outdoor unit will stop automatically after it operates for a few minutes. Then the Automatic defrosting operation starts.
  • Auto-restart function
    In event of power interruption such as a blackout, the air conditioner stops once. But it restarts automatically and performs previous operation when the power supply is resumed.
    If any power interruption occurs after the timer is set, counting down of the timer will be reset.
    After the power supply is resumed, [FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon5 ] indicator on the indoor unit blinks to notify you that there has been a timer fault. In such a case, reset the clock and timer settings.
  • Malfunctions caused by other electrical devices
    Use of other electrical appliances such as an electric shaver or nearby use of a wireless radio transmitter may cause the malfunction of the air conditioner.
    If you encounter such a malfunction, turn off the circuit breaker once.
    Then turn it on again, and resume operation by using the remote controller.
  • Indoor unit temperature and humidity range
    Permissible ranges of temperature and humidity are as follows:
Indoor temperatureCooling/Dry[°C]18 to 32
Heating[°C]16 to 30
Indoor humidity [%]80 or less *1)

*1) If the air conditioner is used continuously for many hours, water may condense on the surface and drip.

  • If the unit is operated under the conditions except the permissible temperature range, the air conditioner operation may stop because of the automatic protection circuit working.
  • Depending on the operating conditions, the heat exchange may freeze, causing water leakage or other malfunction (in the Cooling or Dry mode).

Other information

  • Do not use the air conditioner for any purpose other than room cooling/dry, room heating or fan.
  • For the permissible ranges of temperature and humidity for the outdoor unit, refer to the outdoor unit installation manual.

OPTIONAL PARTS

12.1. Wired remote controller
The optional wired remote controller can be used.
You can use wired and wireless remote controller together.
However, some functions of the wireless remote controller are restricted.
If you set the restricted functions, beeping sound will be heard, [I ], [FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon5 ], and [ FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon6 ] indicators on the indoor unit will blink.
<Restricted functions for wireless remote controller>
When using together with wired remote controller (2-wire)
• Powerful operation

Group control
One remote controller can control up to 16 air conditioners. All of the air conditioners will be operated with the same settings.

TROUBLESHOOTING

FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon1 In the following events, immediately stop operation of  the air conditioner, and disconnect all the power supply by turning off the electrical breaker or disconnecting the power plug. Then consult your dealer or authorized service personnel.
As long as the unit is connected to the power supply, it is not insulated from the power supply even if the unit is turned off.

  • Unit smells of something burning or emits smoke
  • Water leaks from the unit

Does not operate at all.

  •  Has there been a power outage?
    In this case, the unit restarts automatically after the power supply is resumed. (Refer to page 8.)
  • Has the circuit breaker been turned off?
    ⇒ Turn on the circuit breaker.
  • Has a fuse blown out or the circuit breaker been tripped?
    ⇒ Replace the fuse or reset the circuit breaker.
  • Is the timer operating?
    ⇒ To check or deactivate the timer setting, refer to page 5.

Poor cooling or heating performance.

  • Is the unit operating under the conditions except the permissible temperature range?
    In this case, the air conditioner may stop because of the automatic protection circuit working.
  • Do you have an arrangement with your electric company for Demand Response?
    In this case, the air conditioning performance may become lower or the operation may stop. (Refer to page 6.)
  • s the air filter dirty?
    ⇒ Clean the air filter. (Refer to page 7.)
  • Is the intake grille or outlet port of indoor unit blocked?
    ⇒ Remove the obstructions.
  • Is the room temperature adjusted appropriately?
    ⇒ To change the temperature setting, refer to page 5.
  • Is a window or door left opened?
    ⇒ Close the window or the door.
  • Is the fan speed set to Quiet?
    ⇒ To change the fan speed, refer to page 5.
  • <In the Cooling mode> Is direct or strong sunlight shining into the room?
    ⇒ Close the curtains.
  • <In the Cooling mode> Are there other heating apparatus or computers operating, or too many people in the room?
    ⇒ Turn the heating apparatus or computers off, or set the temperature lower. (Refer to page 5.)

Humidity does not drop during the Dry operation.

  • You cannot set the target humidity in the Dry mode. If you feel high humidity, set the temperature lower.

Airflow is weak or stops.

  • Is the fan speed set to Quiet?
    ⇒ To change the fan speed, refer to page 5.
  • Has the Fan Control for Energy Saving set? In this case, the indoor unit fan may stop temporarily while the Cooling operation.
    ⇒ To cancel the Fan control for energy saving, refer to page 6.
  • <In the Heating mode> Have you just started the operation?
    In this case, the fan rotates at very low speed temporarily to warm up the internal parts of the unit.
  • <In the Heating mode> Is the room temperature higher than the set temperature?
    In this case, the outdoor unit stops and the indoor unit fan rotates at very low speed.
  • <In the Heating mode> Is [ ] indicator blinking?
    In this case, the Automatic defrosting operation is working. The indoor unit stops for maximum of 15 minutes. (Refer to page 8.)
  • <In the Dry mode> The indoor unit operates at low fan speed to adjust the room humidity, and may stop from time to time.
  • <In the Auto mode> While the monitoring operation, the fan rotates at very low speed.

Noise is heard.

  • Is the unit operating, or immediate after stopping operation?
    In this case, refrigerant flowing sound may be heard. It may be particularly noticeable for 2-3 minutes after starting operation.
  • Do you hear a slight squeaking sound during the operation?
    This sound is produced by the minute expansion and contraction of the front panel caused by temperature change.
  • <In the Heating mode> Do you hear a sizzling sound?
    This sound is produced by the Automatic defrosting operation. (Refer to page 8.)

Smell coming from the unit.

  • The air conditioner may absorb various smells generated from interior textile, furniture, or cigarette smoke. These smells may be emitted during the operation.

Mist or steam is emitted from the unit.

  • <In the Cooling or Dry mode> A thin mist may be generated by condensation formed with sudden cooling process.
  • <In the Heating mode> Is [ ] indicator on the indoor unit blinking?
    In this case, steam may rise from the outdoor unit because of the Automatic defrosting operation.(Refer to page 8.)

Outdoor unit emits water.

  • <In the Heating mode> The outdoor unit may emit water generated by the Automatic defrosting operation. (Refer to page 8.)
    The unit operates differently from the remote controller setting.
  • Do you have an arrangement with your electric company for Demand Response?
    In this case, the air conditioning performance may become lower or the operation may stop. (Refer to page 6.)
  • Are the batteries in the remote controller exhausted?
    ⇒ Replace the batteries.
    Operation is delayed after restart.
  • Has the power supply turned from Off to On suddenly?
    In this case, the compressor will not operate for about 3 minutes to prevent a blowout of the fuse.

Immediately stop operation and turn off the electrical breaker in following cases. Then consult authorized service personnel.

  • The problem persists even if you perform these checks or diagnostics.
  • On the indoor unit, [I ] and [ FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon5] blink while [FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon6 ] is blinking fast.

State of indicator lamps
Lighting pattern: FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon1Off,FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon2 On, FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon3Blinking, FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon4Any state

StateCauses and solutionsSee page
FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon5Automatic defrosting operation
⇒ Please wait until finishing the defrosting (maximum of 15 minutes).
 

8

Filter indicator
⇒ Clean the air filter and reset the filter sign.
8
FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon6Demand response operation6
FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon7Error code display
⇒ Check the error code and consult authorized service personnel.
10
FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon8Timer setting error because of Auto restart
⇒ Reset the clock and timer settings.
8
FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon9Test run operation (for authorized personnel only)
⇒ Press   to quit the test run.
4
FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon10Restricted function9

Manual Auto operation and Filter indicator reset
You can operate the air conditioner with FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon18 on the indoor unit.

StatusLength of pressing downMode or operation
In operationMore than 3 secondsStop
Stopping2 seconds or lessFilter indicator reset
More than 3 seconds and less than 10 secondsAuto
More than 10 seconds (Only for servicing.) *Forced cooling

* To stop the forced cooling, press this button or  on the remote  controller.
Service check
If [I ] and [ FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon5] blink while [ FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon6] is blinking fast on the indoor unit, check the error code. The error code is 2-digit numbers or characters.

  1. Press [FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon12  ] FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon11The remote controller enters to the Service check mode and “FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon13 ” will appear on the remote controller display.
  2. Press to change the shown error code.
    The indoor unit emits 1 short beep each time the error code changes.
    When the corresponding error code is shown, the indoor unit emits multiple beeps and all the indicator lamps on the indoor unit blink.

FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon14

The characters used for error code

FUJITSU ASTH07KNCA Comfort Single Room Solutions - icon15

To finish the Service check mode, pressPower button/I.
The remote controller returns to the original display.
Tell the error code to authorized service personnel when consulting them.
If the indoor unit emits multiple beeps at “00”, no error is detected.

FUJITSU logoFUJITSU GENERAL LIMITEDFUJITSU ASTH07KNCA Comfort Single Room Solutions - br codePART No. 9333892030-02

Documents / Resouces

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