supervision failure means the panel had heard from the sensor for a period of time. This would mean if it needed to transmit an alarm it wouldnt get through and it wouldnt work. You dont want to disable this you want to fix the problem. There will be more info on the siren fault you will need to know this to help diagnose
Looks like there are 2 tamper terminals. I'd assume a link from 0v to the other tamper connection?
Yes can you invert the strobe in the panel or sounder?
different installers will specialise and prefer different gear.
my pref for example would be hkc.
6wb will be texecom as another example.
there are some id avoid but wont say here
2) sounds like your strobe is configured the worng way. It will need inverting in the panel if the panel is wrong or the bell etc
1) you are right to me means you have a tamper problem on the bell
first off be really careful with your stray cores. There should be nothing sticking out of the terminals like in the images. It will blow something.
Id assume that bla is bell input
and blf is strobe
that looks like a 16 plus. Pretty limited and very basic panel. Is obsolete but if its been looked after is useable.
Or put a flex or a 2-20 in its its place. YOu can then reuse your keypad but id update your detection, bell etc