General Informations On Operation; Cleaning And Care - Fujitsu ASU9RLF1 Operating Manual

General Informations on Operation

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, a microcomputer-controlled automatic
defrost function is equipped in this air conditioner.
If frost forms, the air conditioner will temporarily stop, and
defrost circuit will operate briefl y (maximum of 15 minutes.)
OPERATION 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, the TIMER indicator on the
indoor unit blinks to notify you that there has been a timer fault.
In such a case, reset the timer for your opportune time.
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.

Cleaning and Care

• Before cleaning the indoor unit, be sure to turn it off and all the power supply has been disconnected.
• 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.
• Do not touch the aluminum fi ns of heat exchanger 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.
Daily care
When cleaning the indoor unit body, mind the following:
• Do not use water hotter than 104 °F (40 °C).
• Do not use scouring cleanser, volatile solvents such as benzene or thinner.
• Wipe the unit gently by using soft cloth.
Cleaning the intake grille
1.
Open the intake grille in direction of the arrow a. While gently
pressing the left and right mounting shafts of the intake grille
outward b, remove the intake grille in direction of the arrow c.
c
b
a
2.
Wash the intake grille gently with water or wipe it gently with a soft
cloth moisten with warm water.
Then wipe it with a dry and soft cloth.
En-6 OPERATING MANUAL
CAUTION
c
b
a
Multi-type air conditioner
This indoor unit can be connected to a multi-type outdoor unit,
and used as a multi-type air conditioner that allows multiple
indoor units to be operated in multiple locations.
The indoor units may be operated simultaneously, in accordance
with their respective output.
Simultaneous use of multiple indoor units
• If 2 or more indoor units are operated simultaneously, the
heating and cooling effi ciency will be less than the effi ciency in
single use of the indoor unit.
Combined use of other auxiliary heating or cooling apparatus is
recommended.
• Following combinations cannot be performed when multiple
indoor units are operated:
- HEAT mode and COOL mode (or DRY mode)
- HEAT mode and FAN mode
The indoor unit operated afterward stops and the OPERATION
indicator fl ashes.
• The operating mode (HEAT, COOL, and DRY) of the outdoor
unit is determined by the operating mode of the indoor unit that
is operated fi rst. If the indoor unit is started in FAN mode, the
operating mode of the outdoor unit cannot be determined.
For example, if indoor unit (A) is started in FAN mode and then
indoor unit (B) is operated in HEAT mode, indoor unit (A) will
temporarily start operation in FAN mode but when indoor unit
(B) started operation in HEAT mode, the OPERATION indicator
(green) on the indoor unit (A) will begin to blink (1 second on,
1 second off) and go into standby mode. Indoor unit (B) will
continue to operate in HEAT mode.
• In HEAT mode, the top of the indoor unit may become warm by
emitted heat of circulated coolant through the indoor unit, even
if the unit operation is stopped. This is not a malfunction.
3.
While holding the grille horizontal, set the left and right mounting
shafts into the pillow blocks at the top of the panel a. To latch each
shaft properly, insert the shaft until it snaps.
Then close the intake grille b.
a
b
4.
Press 4 places on the intake grille to close it completely.
a
b