10
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Maintenance and service
Installer and user reference guide
32
FXUA50~100AVEB
VRV system air conditioner
4P673843-1 – 2022.01
NOTICE
When cleaning the heat exchanger, make sure to remove the electronic components
above it. Water or detergent might deteriorate the insulation of electronic
components and result in burnout of these components.
DANGER: RISK OF ELECTROCUTION
Disconnect the power supply for more than 10 minutes, and measure the voltage at
the terminals of main circuit capacitors or electrical components before servicing.
The voltage MUST be less than 50 V DC before you can touch electrical components.
For the location of the terminals, see the warning label for persons performing
service and maintenance.
a
b
c c
a
Control box
b
Printed circuit board
c
Residual voltage measuring points
10.2 Cleaning the unit exterior, air filter and suction grille
CAUTION
Turn off the unit before cleaning the unit exterior, air filter and suction grille.
NOTICE
▪
Do NOT use gasoline, benzene, thinner polishing powder or liquid insecticide.
Possible consequence:
Discoloration and deformation.
▪
Do NOT use water or air of 50°C or higher.
Possible consequence:
Discoloration
and deformation.
▪
Do NOT scrub firmly when washing the blade with water.
Possible consequence:
The surface sealing peels off.
10.2.1 To clean the exterior
WARNING
Do NOT let the indoor unit get wet.
Possible consequence:
Electrical shock or fire.
Clean with a soft cloth. If it is difficult to remove stains, use water or neutral
detergent and wipe with a dry cloth.
10.2.2 To clean the air filter
When to clean the air filter:
▪
Rule of thumb: Clean every 6 months. If the air in the room is extremely
contaminated, increase the cleaning frequency.
▪
Depending on the settings, the user interface can display the
"Time to clean
filter"
notification. Clean the air filter when the notification is displayed.
