24 | Maintenance and service
Installer and user reference guide
155
RXYSA8~12AMY1B
VRV 5-S system air conditioner
4P752782-1A – 2024.02
24 Maintenance and service
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
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
In this chapter
24.1 Maintenance safety precautions............................................................................................................................................ 155
24.1.1 To prevent electrical hazards................................................................................................................................. 155
24.2 Checklist for yearly maintenance of the outdoor unit........................................................................................................... 156
24.3 About service mode operation............................................................................................................................................... 156
24.3.1 To use vacuum mode............................................................................................................................................. 157
24.3.2 To recover refrigerant............................................................................................................................................ 157
24.3.3 Before the maintenance and service of a system with SV unit ............................................................................ 157
24.4 SV unit maintenance and service label .................................................................................................................................. 157
24.1 Maintenance safety precautions
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING/SCALDING
WARNING
Prior to start working on systems containing flammable refrigerant, safety checks are
necessary to ensure that the risk of ignition is minimised. Therefore, some
instructions should be followed.
Please refer to the service manual for more information.
NOTICE:Risk of electrostatic discharge
Before performing any maintenance or service work, touch a metal part of the unit in
order to eliminate static electricity and to protect the PCB.
24.1.1 To prevent electrical hazards
When performing service to inverter equipment:
1 Do NOT perform electrical work for 10 minutes after turning off the power
supply.
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