I am not sure how many times the alarms have falsely activated but once would be enough I would think if you are being fined. The other problem of course is that if the alarms are not operating correctly then there may be an actual fire and the residents will ignore the warning as “it is probably just another false alarm”. So the matter needs to be resolved.
I would start by asking the local fire brigade if they would carry out an inspection and determine if the alarms are suitable for your particular environment and if so whether the sensitivity can be adjusted. You will then hopefully have some ammunition to approach the company which installed the system and insist that they remedy the defects. The installation and products should be under warranty anyway.