General Information - Fujitsu KL Series Operation Manual

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.
NOTE:
• If dirt accumulates on the air filter, airflow will be reduced, operating
efficiency will lower, and the noise will increase.
Replacing air cleaning filters(optional)
NOTES:
• For the frequencies at which the air cleaning filters are to be
replaced, refer to ["Frequencies at which the components are to be
maintained"] in "CLEANING AND CARE".
• Use an air cleaning filter as soon as possible after opening the
package. The air cleaning effect decreases when the filters are left
in the opened package.
1. Remove the air filters from indoor unit body. Refer to steps
1 and 2 of "Cleaning air filter".
2. Remove the air cleaning filter holder and air cleaning filter
from the air filter.
Remove the 4 hooks of the air cleaning filter holder from the
latches of the air filter.
Hook and Latch (4places)
Air cleaning filter
holder
Air cleaning filter
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. Attach the air cleaning filter and the filter holder to each air
filter.
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.
■ 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.
Press 4 places on the intake
grille to close it completely.
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 a long period of use, dust may accumulate inside the indoor unit
even when it has been periodically cleaned, deteriorating performance
and also potentially causing health problems.
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.
Clean the air filter when the indicator lamp shows the
)
following:
Indicator lamp
After cleaning, reset the filter indicator by pushing
for 2 seconds or less. (Refer to page 3.)

11. GENERAL INFORMATION

■ 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.
Air filter ■ 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.)
[ ] 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, [
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.
En-7
Blinking pattern
Blinks 3 times, at intervals of 21 seconds
] indicator on the indoor unit
on the indoor unit