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10
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Maintenance and service
Installer and user reference guide
26
FXMQ-A
VRV system air conditioner
4P701548-1 – 2022.07
10 Maintenance and service
10.1 Precautions for maintenance and service
CAUTION
See
14] to acknowledge all related safety instructions.
NOTICE
NEVER inspect or service the unit by yourself. Ask a qualified service person to
perform this work. However, as end user, you may clean the air filter and air outlet.
NOTICE
Maintenance MUST be done by an authorised installer or service agent.
We recommend performing maintenance at least once a year. However, applicable
legislation might require shorter maintenance intervals.
NOTICE
Do NOT wipe the controller operation panel with benzine, thinner, chemical dust
cloth, etc. The panel may get discoloured or the coating peeled off. If it is heavily
dirty, soak a cloth in water-diluted neutral detergent, squeeze it well and wipe the
panel clean. Wipe it with another dry cloth.
Following symbols may occur on the indoor unit:
Symbol
Explanation
Measure the voltage at the terminals of main circuit capacitors or
electrical components before servicing.
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+
C-
a
a
Residual voltage measuring points (C-, C+)
b
Printed circuit board
c
Control box