20/05/2020
VACUUM LEAK DETECTOR
VLR ..
and
VLR .. MV
- 39 -
8. Malfunction
(Alarm)
8.1 Alarm
Description
If an alarm goes off, one must assume that there are vapors stored in
the interstitial space of the stored/conveyed product. Take appropri-
ate protective measures.
(1) An alarm (vacuum loss) is indicated by the red “Alarm” signal
lamp lighting up and the sounding of the audible signal, if availa-
ble.
(2) Other alarms are indicated as follows:
Probe alarm: Yellow LED that flashes when the audible signal is
acknowledged.
Pressure build-up alarm: Yellow LED flashes, red LED lights up.
The red LED flashes when the audible alarm is acknowledged.
(3) Close any shut-off cocks in the connection line between the in-
terstitial space and leak detector.
(4) Shut off the audible signal by activating the “Sound off” key, if
available.
(5) Inform the installation company.
(6) The installation company must detect the cause and correct it.
CAUTION: Depending on the tank/pipelines, there could be liq-
uid under pressure in the connection lines.
CAUTION: Do not depressurize the interstitial space in the
tanks with flexible leak protection lining (risk of collapse of the in-
sert)!
(7) Perform a functional check as per 7.3.
8.2 Malfunction
In the event of a malfunction, only the red signal lamp will light up in
addition to the green signal lamp (yellow is off). Also, the audible sig-
nal cannot be acknowledged.
Solenoid valve malfunction (e.g., no power): Yellow LED lights up and
the red LED flashes.
8.3 How to Behave
The different alarms can be used for different automated reactions
(e.g., switching off pumps).
Inform the installation company. They need to find and rectify the er-
ror.
After repair, a functional check must be conducted.
Malfunction (Alarm)