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Maintenance and service
Installer and user reference guide
24
BS4~12A14AJV1B
VRV 5 branch selector unit
4P695527-1 – 2022.02
Periodical inspections for refrigerant leaks may be required depending on the
applicable legislation. Contact your installer for more information.
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
Contact your installer for more information.
7.3.1 About the refrigerant leakage sensor
WARNING
The R32 refrigerant leakage sensor must be replaced after every detection or at the
end of its lifetime. ONLY authorised persons may replace the sensor.
NOTICE
The R32 refrigerant leakage sensor is a semiconductor detector which may
incorrectly detect substances other than R32 refrigerant. Avoid using chemical
substances (e.g. organic solvents, hair spray, paint) in high concentrations, in the
close proximity of the BS unit because this may cause misdetection by the R32
refrigerant leakage sensor.
NOTICE
Functionality of the safety measures are periodically automatically checked. In case
of malfunction, an error code will be displayed on the user interface.
INFORMATION
The sensor has a lifetime of 10 years. The user interface displays error "
CH-22
"
6 months before the end of the sensor lifetime and error "
CH-23
" after the end of
the sensor lifetime. For more information, see the reference guide of the user
interface and contact your dealer.
In case of detection
1
The user interface of the indoor units connected to the BS unit displays error
"
A0-20
"
.
2
If applicable, the safety measures of the BS unit are activated. These can be
the following:
▪
the external alarm emits a signal, or
▪
the extraction fan and damper of the BS unit start operating in case of a
ventilated enclosure.
3
Contact your dealer immediately. For more information, see the installation
manual of the outdoor unit.
INFORMATION
To stop the alarm of the user interface, see the reference guide of the user interface.
