It is a requirement to have working fire alarms, and they are common property.
If the alarms that the OC are installed are defective, then they need to be replaced at the OC’s expense, and pretty quickly as neither an owner, nor the OC should have to foot the false alarm call outs (which I believe are about $200-400). It’s a waste of money and fire department resource, and if there were a real fire, you don’t want to be known as the building that cries wolf.
You have some options as I see it.
* Raise the matter with the EC via your strata manager. It needs to be given urgent attention.
* It may be that the alarm system is covered by warranty. Most should have at least 2+ years. In that case, get the EC to seek repairs under warranty.
* Get the matter added to an AGM. Especially if not covered by warranty, it will need to be replaced (which will require capital works approval)
If that doesn’t work then I would launch action through fair trading to have the OC cover/reimburse owners the cost of the call outs. Once that precedent is set and is costing the building money, you will see that the EC will make sure the defective system is repaired/replaced