Siemens CU240S Error F00042: Speed Control Optimisation Failure

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

Fault codeF00042

Speed Control Optimisation Failure indicates motor data identification failed, or timeout waiting for stable speed or inconsistent readings. The manual lists no action for this code.

Model
Siemens CU240S
Display shows
Speed Control Optimisation Failure (F00042)
Type
Fault code
Source
Manual p. 383

What F00042 means

Speed Control Optimisation Failure p. 383

Common causes

  • Reaction: OFF 2 Acknowledge: Quit fault eg. via D12 Cause: Motor data identification failed. p. 383
  • r0949 = 0: Time out waiting for stable speed p. 383
  • r0949 = 1: Inconsistent readings p. 383
  • Remedy: Make sure motor has data been entered correctly. p. 383
  • Motor data identification needs to have been done. p. 383

If F00042 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 383 All CU240S error codes Manual details & download

This page summarises what the manufacturer’s manual says about F00042; 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.