1 hour ago, nmpuk said:

Ok, so remove the wire running from 0v to TR, but leave the white cable in TR? 
 

And Green to be left as it is? 
 

thank you! 

But put the wire running between 0v and tmpf in the bell

Sorry, hectic weekend. I'm a little confused but I this is what I think needs to be done: 

 

1. Remove the link (Black loop) in the panel between 0v and TR

2. Put a link in between 0v and tmpf in the sounder 

3. The green can be left as is. 

 

Does that sound right? 

 

thx nate

2 hours ago, nmpuk said:

Sorry, hectic weekend. I'm a little confused but I this is what I think needs to be done: 

 

1. Remove the link (Black loop) in the panel between 0v and TR

2. Put a link in between 0v and tmpf in the sounder 

3. The green can be left as is. 

4. Move white to tmpr in the bell 

 

Does that sound right? 

 

thx nate

4.

OP it looks like you had the tamper disabled or linked out on your SAB. Al is showing what needs to be done to rectify it. I also assume it was linked out for a reason. Either though lack of knowledge or because of an issue they didnt want to tell you about.

If the issue remains then wiring it correctly will give you a fault that previously looked ok as you had no fault. You still did it was just bypassed

Thank you both, I'll have a look at this during the week and post back what I find after making the four changes. Thank you for clearing it up for me, as you can tell, this isn't my bread and butter, but much appreciate the help. 

 

My parents had this changed a while ago, but didn't mention any problems etc. reported by the installer - Hopefully it was just lack of knowledge, rather than an outstanding problem.  Fingers crossed!

 

Thank you!

Edited July 27, 2025Jul 27 by nmpuk

So just wanted to update and wrap up this. Thanks to all the help and pointers, I updated the wiring as explained above, this afternoon, and all is working fine.
 

No unexpected issues and alarm appears to be working just fine. 
 

Thank you all! 
nate