Siemens MICROMASTER 420 Error A0709: CB warning 10

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

Warning codeA0709

CB warning 10 indicates a problem with the communication board. The manual's first action is: “See CB user manual”

Model
Siemens MICROMASTER 420
Display shows
CB warning 10 (A0709)
Type
Warning code
Source
Manual p. 73

What A0709 means

CB warning 10 p. 73

Common causes

  • CB (communication board) specific p. 73

Safety warnings — read before you start

  • DANGERDANGER. indicates an immiently hazardous situation which, if not avoided, will result in death or serious injury. p. 6

What to do

  1. See CB user manual p. 73

If A0709 is still not resolved

  • See CB user manual p. 73
    “See CB user manual”
Open the manual at page 73 All MICROMASTER 420 error codes Manual details & download

This page summarises what the manufacturer’s manual says about A0709; 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.