Daikin VRV IV Series - Maintenance and service; Maintenance safety precautions

21 | Maintenance and service
Installer and user reference guide
121
RKXYQ5T8+8T7Y1B + RDXYQ5T8+8T7V1B
VRV IV heat pump for indoor installation
4P499898-1B – 2021.12
21 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
21.1 Overview: Maintenance and service...................................................................................................................................... 121
21.2 Maintenance safety precautions............................................................................................................................................ 121
21.2.1 To prevent electrical hazards................................................................................................................................. 121
21.3 Checklist for yearly maintenance of the heat exchanger unit............................................................................................... 122
21.4 About service mode operation............................................................................................................................................... 122
21.4.1 To use vacuum mode ............................................................................................................................................. 122
21.4.2 To recover refrigerant............................................................................................................................................ 123
21.1 Overview: Maintenance and service
This chapter contains information about:
▪ Preventing electrical hazards when maintaining and servicing the system
▪ The refrigerant recovery operation
21.2 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.
21.2.1 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.