Siemens CU240S Error A00912: Vdc-min Controller active – Meaning, Causes & Fix

Alarm codeA00912

DC-link voltage has dropped below minimum level, triggering the Vdc-min controller for deceleration. The manual lists no action for this code.

Model: Siemens CU240S
Display shows: Vdc-min Controller active (A00912)
Type: Alarm code
Source: Manual p. 396

Meaning
Common causes
Still not solved
Source

What A00912 means

Vdc-min Controller active p. 396

Common causes

Vdc min controller will be activated if DC-link voltage (r0026) falls below minimum level (P2172). The kinetic energy of the motor is used to buffer the DC-link voltage, thus causing deceleration of the drive. So short mains failures do not necessarily lead to an undervoltage trip. p. 396

If A00912 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 A00912; 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.