Method for localising an earth fault of a fire protection system

A method for localizing a ground fault of a fire protection system, wherein the fire protection system has a fire alarm and/or extinguishing control panel, wherein the fire alarm and/or extinguishing control panel comprises a plurality of connection points, a central unit and a ground fault identification module, wherein one or more subscribers can be connected to each connection point via a connection line, wherein each connection point has a switching element for electrically connecting and/or disconnecting the connection line to and, respectively, from the connection point and has a computer unit for actuating the switching element, and wherein the ground fault identification module is connected between a ground potential and an internal interface of a computer unit of the central unit,

• the method comprising, during or after identification of a ground fault by the ground fault identification module, the following steps:
• disconnecting the connection lines of one, more or all of the connection points by opening the switching elements until at least no ground fault is identified by the ground fault identification module, and then
• connecting the connection lines successively for each connection point by closing the respective switching element.