Siemens CU240S Error A00921: AO parameters not set properly.

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

Alarm codeA00921

AO parameters are incorrectly set and must be adjusted to avoid illogical results. The manual's first action is: “Check the following: • Parameter settings for output identical • Parameter settings for input identical • Parameter settings for output do not correspond to AO type Set P0777 and P0778 to different values.”

Model
Siemens CU240S
Display shows
AO parameters not set properly. (A00921)
Type
Alarm code
Source
Manual p. 396

What A00921 means

AO parameters not set properly. p. 396

Common causes

  • AO parameters (P0777 and P0779) should not be set to identical values, since this would produce illogical results. p. 396

What to do

  1. Check the following: • Parameter settings for output identical • Parameter settings for input identical • Parameter settings for output do not correspond to AO type Set P0777 and P0778 to different values. p. 396

If A00921 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 396 All CU240S error codes Manual details & download

This page summarises what the manufacturer’s manual says about A00921; 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.