Siemens CU240B/E-2 Error F30021: Power unit: Ground fault

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

Fault codeF30021

The power unit has detected a ground fault. The manual's first action is: “OFF2”

Model
Siemens CU240B/E-2
Display shows
Power unit: Ground fault (F30021)
Type
Fault code
Source
Manual p. 713

What F30021 means

Power unit: Ground fault p. 713

Common causes

  • Power unit has detected a ground fault. p. 713

What to do

  1. OFF2 p. 713

If F30021 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 713 All CU240B/E-2 error codes Manual details & download

This page summarises what the manufacturer’s manual says about F30021; 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.