22
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Maintenance and service
Installer and user reference guide
136
R R8T7V1B
VRV IV heat pump for indoor installation
4P499898-1A – 2020.10
22 Maintenance and service
NOTICE
Maintenance MUST be done by an authorized 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
22.1 Overview: Maintenance and service
This chapter contains information about:
▪
Preventing electrical hazards when maintaining and servicing the system
▪
The refrigerant recovery operation
22.2 Maintenance safety precautions
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING/SCALDING
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.
22.2.1 To prevent electrical hazards
When performing service to inverter equipment:
1
Do NOT open the electrical component box cover for 10 minutes after turning
off the power supply.
Содержание VRV IV RKXYQ5T8Y1B Series
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