7 Maintenance and service
Installation and operation manual
13
FXUA50~100AVEB
VRV system air conditioner
3P668115-2C – 2022.01
4
Dry the air filter in the shadow.
5
Reattach the air filter and close the suction grille.
6
Turn ON the power.
7
To remove warning screens, see the reference guide of the
user interface.
7.2.3
To clean the suction grille
1
Open the suction grille
. Simultaneously slide the two knobs
and carefully open the suction grille.
a
a
a
Knobs
2
Remove the suction grille.
Unhook the 4 straps from the
indoor unit. Open the suction grille in a 45° angle and unhook it
from the hooks (3 places).
45°
3
1
2
3
Remove the air filter.
Refer to
12].
4
Clean the suction grille.
Wash with a soft bristle brush and
water or neutral detergent. If the suction grille is very dirty, use
a typical kitchen cleaner, leave it on for 10 min, then wash it
with water.
5
Reattach the air filter.
Refer to
12].
6
Reattach the suction grille
and close it.
(steps 2 and 1 in
reverse order).
INFORMATION
When closing the suction grille, make sure the straps of the
suction grille are not pinched anywhere.
7.3
About the refrigerant
This product contains fluorinated greenhouse gases. Do NOT vent
gases into the atmosphere.
Refrigerant type: R32
Global warming potential (GWP) value: 675
NOTICE
Applicable legislation on
fluorinated greenhouse gases
requires that the refrigerant charge of the unit is indicated
both in weight and CO
2
equivalent.
Formula to calculate the quantity in CO
2
equivalent
tonnes:
GWP value of the refrigerant × total refrigerant
charge [in kg] / 1000
Please contact your installer for more information.
WARNING: MILDLY FLAMMABLE MATERIAL
The refrigerant inside this unit is mildly flammable.
WARNING
The appliance shall be stored in a room without
continuously operating ignition sources (example: open
flames, an operating gas appliance or an operating electric
heater).
WARNING
▪ Do NOT pierce or burn refrigerant cycle parts.
▪ Do NOT use cleaning materials or means to accelerate
the defrosting process other than those recommended
by the manufacturer.
▪ Be aware that the refrigerant inside the system is
odourless.
WARNING
▪ The refrigerant inside the unit is mildly flammable, but
normally does NOT leak. If the refrigerant leaks in the
room and comes in contact with fire from a burner, a
heater, or a cooker, this may result in fire, or the
formation of a harmful gas.
▪ Turn OFF any combustible heating devices, ventilate
the room, and contact the dealer where you purchased
the unit.
▪ Do NOT use the unit until a service person confirms
that the part from which the refrigerant leaked has been
repaired.
7.3.1
About the refrigerant leakage sensor
WARNING
The R32 refrigerant leakage sensor must be replaced after
every detection or at the end of its lifetime. ONLY
authorised persons may replace the sensor.
NOTICE
Functionality of the safety measures are periodically
automatically checked. In case of malfunction, an error
code will be displayed on the user interface.
NOTICE
The R32 refrigerant leakage sensor is a semiconductor
detector which may incorrectly detect substances other
than R32 refrigerant. Avoid using chemical substances
(e.g. organic solvents, hair spray, paint) in high
concentrations, in the close proximity of the indoor unit
because this may cause misdetection of the R32
refrigerant leakage sensor.
INFORMATION
The sensor has a lifetime of 10 years. The user interface
displays error "
CH-05
" 6 months before the end of the
sensor lifetime and error "
CH-02
" after the end of the
sensor lifetime. For more information, refer to the reference
guide of the user interface and contact your dealer.
In case of detection when the unit is in standby
When the detection occurs when the unit is in standby, a "false
detection check" will occur.
False detection check
1
The unit starts fan operation on the lowest setting.
2
The user interface displays error "
A0-13
", emits an alarm sound
and the status indicator blinks.
3
The sensor checks if a refrigerant leakage or misdetection
occurred.
