Siemens CU240B/E-2 Error F30081: Power unit: Switching operations too frequent

Control unit · taken from the manufacturer’s manual, pages cited

Fault codeF30081

The power unit performed too many switching operations due to current limitation or incorrect parameterization or motor fault. The manual lists no action for this code.

Model
Siemens CU240B/E-2
Display shows
Power unit: Switching operations too frequent (F30081)
Type
Fault code
Source
Manual p. 720

What F30081 means

Power unit: Switching operations too frequent p. 720

Common causes

  • The power unit has executed too many switching operations for current limitation. p. 720
  • - closed-loop control is incorrectly parameterized. p. 720
  • - motor has a short-circuit or fault to ground (frame). p. 720
  • - U/f operation: Up ramp set too low. p. 720
  • - U/f operation: Rated current of motor much greater than that of power unit. p. 720
  • - power cables are not correctly connected. p. 720
  • - power cables exceed the maximum permissible length. p. 720
  • - power unit defective. p. 720
  • Fault value (r0949, interpret bitwise binary): p. 720
  • Bit 0: Phase U. p. 720
  • Bit 1: Phase V. p. 720
  • Bit 2: Phase W. p. 720

If F30081 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 720 All CU240B/E-2 error codes Manual details & download

This page summarises what the manufacturer’s manual says about F30081; 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.