Don't think it can be the easy one. low batteries as they are hard
wired in to the power. They are located in our Stairwell in our
building. One is right at my door and has a high pitched SCREECH

They seem to be going off at the same time one after another. Not all
of them just some of them.

I was thinking maybe they were left in a TESt mode or something. As
iam pretty sure Smoke alarms don't make noise till they need to



Any ideas.

Going to call our buildings Strata, people who look after the building
to get it fixed anyways. Just like to know your thought son the matter


Thanks.