Siemens CU240S Error F00020: Mains Phase Missing – Meaning, Causes & Fix

Fault codeF00020

The Siemens CU240S detected a missing mains phase when pulses are enabled and drive is loaded. The manual's first action is: “Check the input wiring of the mains phases.”

Model: Siemens CU240S
Display shows: Mains Phase Missing (F00020)
Type: Fault code
Source: Manual p. 381

Meaning
Common causes
What to do
Still not solved
Source

What F00020 means

Mains Phase Missing p. 381

Common causes

Fault occurs if one of the three input phases is missed and the pulses are enabled and drive is loaded. p. 381

What to do

Check the input wiring of the mains phases. p. 381

If F00020 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 381 All CU240S error codes Manual details & download

This page summarises what the manufacturer’s manual says about F00020; 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.