Siemens S5-115U Error NAU: Power failure

Siemens S5-115U Programmable Controller · taken from the manufacturer’s manual, pages cited

Error codeNAU

Power failure occurred, causing system interruption. The manual lists no action for this code.

Model
Siemens S5-115U
Display shows
Power failure (NAU)
Type
Error code
Source
Manual p. 139

What NAU means

Power failure p. 139

Common causes

  • There has been a power failure. p. 139
  • Power failure p. 139

If NAU 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 139 All S5-115U error codes Manual details & download

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