Zeror.ai Error Codes Siemens A01020

Siemens A01020

Brand: SiemensModel: SINAMICS G120 CU250S2Error code: A01020

What the Fault Means

Alarm: Writing to RAM disk unsuccessful

Likely causes

  • A write access to the internal RAM disk was unsuccessful.

Solution and Safe First Checks

  1. Adapt the file size for the system logbook to the internal RAM disk (p9930).

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.