Siemens MICROMASTER 420 Error F0072: No Data from USS (RS485 link) during Telegram Off Time

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

Fault codeF0072

No Data from USS (RS485 link) during Telegram Off Time The manual's first action is: “1. Check connections to the communications board 2. Check the master”

Model
Siemens MICROMASTER 420
Display shows
No Data from USS (RS485 link) during Telegram Off Time (F0072)
Type
Fault code
Source
Manual p. 71

What F0072 means

No Data from USS (RS485 link) during Telegram Off Time p. 71

Common causes

  • No response during telegram off time via USS (COM link) p. 71

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
  • WARNINGWARNING. indicates a potentially hazardous situation which, if not avoided, could result indeath or serious injury. p. 6
  • CAUTIONCAUTION. used with the safety alert symbol indicates a potentially hazardous situationwhich, i f not avoided, may result in minor or moderate injury. p. 6

What to do

  1. 1. Check connections to the communications board 2. Check the master p. 71

If F0072 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 71 All MICROMASTER 420 error codes Manual details & download

This page summarises what the manufacturer’s manual says about F0072; 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.