Siemens MICROMASTER 420 Error A0707: CB warning 8

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

Warning codeA0707

CB warning 8 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 8 (A0707)
Type
Warning code
Source
Manual p. 73

What A0707 means

CB warning 8 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 A0707 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 A0707; 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.