Siemens CU240S Error F01660: Wrong safety checksum

Siemens CU240S · taken from the manufacturer’s manual, pages cited

Fault codeF01660

Wrong safety checksum indicates an attempt to exit safety commissioning with mismatched checksum values for safety parameters. The manual lists no action for this code.

Model
Siemens CU240S
Display shows
Wrong safety checksum (F01660)
Type
Fault code
Source
Manual p. 403

What F01660 means

Wrong safety checksum p. 403

Common causes

  • r0949 = 0: Attempt to leave safety commissioning with r9798 = p9799. p. 403
  • r0949 = 1: Attempt to leave safety commissioning with r9898 = p9899. p. 403
  • r0949 = 2: Attempt to leave safety commissioning with r9798 = r9898. p. 403

If F01660 is still not resolved

The manual gives no further instruction for this code. Open the code table in the PDF or contact Siemens service.

Open the manual at page 403 All CU240S error codes Manual details & download

This page summarises what the manufacturer’s manual says about F01660; each statement links to the page it comes from, and quoted lines are copied word for word. It is not a substitute for the manual or for a qualified installer. ManualLib is not affiliated with Siemens. Found a mistake? Report an error.