Siemens MICROMASTER 420 Error A0911: Vdc-max controller active

Siemens MICROMASTER 420 inverter · taken from the manufacturer’s manual, pages cited

Warning codeA0911

Vdc-max controller is active to limit DC-link voltage. The manual's first action is: “1. Check parameter inverter input voltage 2. Check ramp-down times”

Model
Siemens MICROMASTER 420
Display shows
Vdc-max controller active (A0911)
Type
Warning code
Source
Manual p. 73

What A0911 means

Vdc-max controller active p. 73

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. 73

What to do

  1. 1. Check parameter inverter input voltage 2. Check ramp-down times p. 73

Before you service the product, read the safety instructions in the manual p. 6.

If A0911 is still not resolved

  • Check parameter inverter input voltage. Check ramp-down times. p. 73
    “1. Check parameter inverter input voltage 2. Check ramp-down times”
Open the manual at page 73 All MICROMASTER 420 error codes Manual details & download

This page summarises what the manufacturer’s manual says about A0911; 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.