Carry out repairs if they are unaware that they are needed (and once they become aware, they have carry out the repairs within a reasonable time but necessarily straightaway)
Gwneud atgyweiriadau os nad yw'n ymwybodol eu bod yn angenrheidiol (ac unwaith y daw'n ymwybodol, mae'n rhaid iddo wneud yr atgyweiriadau o fewn cyfnod rhesymol ond nid yn syth o reidrwydd)