Zeror.ai Error Codes Siemens A01425

Siemens A01425

Brand: SiemensModel: SINAMICS G120 CU250S2Error code: A01425

What the Fault Means

Alarm: Topology: Serial number different

Likely causes

  • The topology comparison has detected differences in the actual and target topologies in relation to one component
  • The serial number is different
  • Alarm value (r2124, interpret hexadecimal): ddccbbaa hex: dd = reserved cc = number of differences (%3) bb = component class (% 2) aa = component number (%1) Note: The component class is described in F01375
  • The drive system is no longer booted

Solution and Safe First Checks

  1. change over the actual topology to match the target topology.
  2. download the target topology that matches the actual topology (commissioning software).

Safety: do not work inside the panel without isolating the power; if unsure, consult a qualified technician.

Related Siemens error codes

Source: the Zeror.ai industrial fault database and Siemens technical documentation. This page is for information; on critical systems follow the manufacturer's manual and authorised service.

Siemens A01425 · Zeror.ai