Hanwei Electronics Co., Ltd www.hwsensor.com
Tel: 86-371-67169070/80 Email: sales@hwsensor.com
6.2 VAN300-LEL
6.2.1 Connect it with the power supply, and Power LED turns on. The system starts
warm-up for 3 minutes. During warm-up, the detection function doesn’t work. After 3
minutes, the system enters detection status. Power LED of the panel turns on, and the
Power LED of the detectors keep flickering.
6.2.2 When LPG concentration reaches the presetting alarm level, Alarm LED of the
detectors flickers, and the detector sends alarming signal to the panel. Then the panel
gives alarming: Alarm LED flickers, buzzer gives sound alarming, and it drives relay output.
It can also drive the external speaker or alarming light if have.
6.2.3 When LPG concentration is lower than the presetting alarming level, all the alarming
disappear and the system returns to the normal detection status.
6.3 Fault alert
Once the wire connection is not good or short circuit occurs, Fault LED of the detectors
turn on, and the detectors send signal to the panel. The panel gives visible and audio
alarm. Fault LED of panel turns on, buzzer gives sound alarming. It can also drive the
external speaker or alarming light if have. When there is fault alarming, the system
detection function doesn’t work.
6.4 Button
Test button: In normal detection status, press the buttons of both panel and detectors, the
system simulates the basic functions.
7. Trouble shooting and solution
No audio nor visible
alarming when pressing
the buttons
No response to the target
gas
