9 | Maintenance and service
Installer and user reference guide
33
RXYTQ
VRV IV+ heat pump for high ambient temperatures
4P561157-1B – 2021.11
9 Maintenance and service
NOTICE
NEVER inspect or service the unit by yourself. Ask a qualified service person to
perform this work.
WARNING
NEVER replace a fuse with a fuse of a wrong ampere ratings or other wires when a
fuse blows out. Use of wire or copper wire may cause the unit to break down or
cause a fire.
CAUTION
Do NOT insert fingers, rods or other objects into the air inlet or outlet. Do NOT
remove the fan guard. When the fan is rotating at high speed, it will cause injury.
CAUTION
After a long use, check the unit stand and fitting for damage. If damaged, the unit
may fall and result in injury.
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.
In this chapter
9.1 Maintenance after a long stop period ................................................................................................................................... 33
9.2 Maintenance before a long stop period ................................................................................................................................ 34
9.3 About the refrigerant ............................................................................................................................................................. 34
9.4 After-sales service and warranty............................................................................................................................................ 34
9.4.1 Warranty period..................................................................................................................................................... 34
9.4.2 Recommended maintenance and inspection........................................................................................................ 35
9.4.3 Recommended maintenance and inspection cycles ............................................................................................. 35
9.4.4 Shortened maintenance and replacement cycles................................................................................................. 36
9.1 Maintenance after a long stop period
E.g., at the beginning of the season.
▪ Check and remove everything that might be blocking inlet and outlet vents of
indoor units and outdoor units.
▪ Clean air filters and casings of indoor units. Contact your installer or maintenance
person to clean air filters and casings of the indoor unit. Maintenance tips and
procedures for cleaning are provided in the installation/operation manuals of
dedicated indoor units. Make sure to install cleaned air filters back in the same
position.
▪ Turn on the power at least 6 hours before operating the unit in order to ensure
smoother operation. As soon as the power is turned on, the user interface
display appears.
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