Mains powered interconnected smokes - not connected?

UPDATE: after much troubleshooting I tracked down the smoke detector that has the power feed coming into it. I then did some further detection and found the FCU which had a blown switch! Replaced this and “most” of the detectors now have a green light.

Issues now:
1. 1 of the detectors has a green and red light and the test function does not work
2. 1 of the detectors has a green light but the test function does not work
3. Most significantly none of them are interconnected. I tested two which are wired in series but they still don’t sound together.

Thanks for your help to date.
 
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Hi All,

I was wondering if anyone had any thoughts on the above please. Thanks in advance.
 
It's around 3 years ago and I don't even recall who installed the system.
I am comfortable doing this if I could have some guidance please.
 
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I’ve spoken to Aico and they will replace the faulty detectors.

I am still at a loss on why the interconnect isn’t working. It’s not even working between the first two detectors.

I would really appreciate any suggestions please
 
D

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