The DC-link voltage is being controlled to stay within limits due to active Vdc-max controller. The manual's first action is: “Check the following: • Supply voltage must lie within limits indicated on rating plate. • Ramp-down time (P1121) must match inertia of load. Higher inertia requires longer ramp times; otherwise, apply braking resistor.”
- Model
- Siemens CU240S
- Display shows
- Vdc-max controller active (A00911)
- Type
- Alarm code
- Source
- Manual p. 396
What A00911 means
Vdc-max controller active p. 396
Common causes
- Vdc max controller is active; so ramp-down times will be increased automatically to keep DC-link voltage (r0026) within limits (P2172). p. 396
What to do
- Check the following: • Supply voltage must lie within limits indicated on rating plate. • Ramp-down time (P1121) must match inertia of load. Higher inertia requires longer ramp times; otherwise, apply braking resistor. p. 396
If A00911 is still not resolved
The manual gives no further instruction for this code. Open the code table in the PDF or contact Siemens service.
This page summarises what the manufacturer’s manual says about A00911; 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.