@Handymanjo
Thanks for your response.
I’m just been concern if I could reset with normal code or system recognise this as a tampering and need an engineer.
Hi
Our property has installed with Gardtec 300 series burglar alarm.
When the main power supply switched off, the alarm goes off. I learnt, this is because of weak battery inside the panel.
I’m looking for some advice, how to replace the battery without messing it up.
Thanks