Siemens MICROMASTER 420 Error F0003: Undervoltage

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

Fault codeF0003

F0003 indicates the inverter detected an undervoltage condition. The manual's first action is: “Check the following: 1. Supply voltage (P0210) must lie within limits indicated on rating plate”

Model
Siemens MICROMASTER 420
Display shows
Undervoltage (F0003)
Type
Fault code
Source
Manual p. 70

What F0003 means

Undervoltage p. 70

Common causes

  • Main supply failed p. 70
  • Shock load outside specified limits p. 70

What to do

  1. Check the following: 1. Supply voltage (P0210) must lie within limits indicated on rating plate p. 70
  2. 2. Supply must not be susceptible to temporary failures or voltage reductions p. 70

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

If F0003 is still not resolved

  • Contact your service dealer for assistance. p. 70
    “Check the following: 1. Supply voltage (P0210) must lie within limits indicated on rating plate”
Open the manual at page 70 All MICROMASTER 420 error codes Manual details & download

This page summarises what the manufacturer’s manual says about F0003; 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.