Cobra allarm help - 3 beeps and flashes on locking - no triggering the garage door

[ItaMotorhomer]

Hi

Our Motorhome has a cobra alarm fitted I believe the 4100 model

2 sensors are fitted, one to the hen door and one on the garage door

We found that it doesn’t trigger when we open the garage door (Allarm set)

Reading the manual it says it should beep + flash 2 times when locking/activating the alarm - ours beeps & flashes 3 times

What do this mean ? Could this that it’s not setting the garage door sensor ?

I’ve tried looking online for beep flashes fault code meaning but cannot find anything

 

[Revolvor]

On our old Cobra alarm, 3 beeps meant at least one circuit wasn't setting. On mine, I found out that the activating magnet on one locker was missing. I bonded on a small magnet off eBay, and problem solved.

 

[Landy Andy]

Is it a magnet type switch on door? If yes they often have a led to show if working and when triggered or not.

 

[ItaMotorhomer]

Is it a magnet type switch on door? If yes they often have a led to show if working and when triggered or not.

This is what it’s in the hab door & garage