My guess would be that the OC owned the scanners to begin with and allocated those scanners to the Owners. The scanners then became the responsibility of the Owners to repair and replace.
If the scanners were lost or broken then the Owners bought new ones from the OC. The scanners were passed onto subsequent Owners by the Owners, rather than the OC. The condition of your scanner is something that you should have taken up with the person who sold you your apartment rather than the OC.
It would not be unreasonable for you to ask to purchase a scanner for each responsible person and/or adult within your apartment.
The Office of Fair Trading states that keys, security cards and access passes are the responsibility of the Lot owner to repair and replace. See here: