when I worked for a housing association, the tenancy agreement stated that the tenant was responsible for regularly checking the fire alarm was working and for replacing the batteries when they ran out. As a housing association property is considered to be a private home, these things are usually the responsibility of the tenant. Of course, if a tenant checked the fire alarm, as most people do on a regular basis, and found it wasn't working even with a change of battery, then maintenance staff would investigate and repair or replace as necessary. It might help to check to tenancy agreement as and any associated paperwork, as this normally states very clearly what the tenant's responsibilities are. Tenants are normally responsible for decoration and keeping the place in clean, good order, plus for mending simple things like taps, door latches, locks etc and for replacing things that they damage.