Daikin SV1A25AJV1B - About the Refrigerant Leakage Sensor

7 | Maintenance and service
Installer and user reference guide
29
SV1A25AJV1B+SV4~8A14AJV1B
VRV 5 safety valve unit
4P749917-1 – 2023.09
7.2.1 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 SV 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 SV unit displays error
"A0-20".
2 If applicable, the safety measures of the SV unit are activated. These can be
the following:
▪ the external alarm emits a signal, or
▪ the extraction fan and damper of the SV 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.