Danfoss 100 FLOW Error ID 521: Safety diagnostics

Danfoss 100 FLOW · taken from the manufacturer’s manual, pages cited

Fault codeID 521

There is a malfunction in the ATEX thermistor diagnostic, indicating no connection in the input. The manual's first action is: “Reset the drive and restart.”

Model
Danfoss 100 FLOW
Display shows
Safety diagnostics (ID 521)
Type
Fault code
Source
Manual p. 305

What ID 521 means

Safety diagnostics p. 305

Common causes

  • A malfunction in the ATEX thermistor diagnostic. There is no connection in the ATEX thermistor input. p. 305

What to do

  1. Reset the drive and restart. p. 305
  2. If the fault occurs again, change the option board. p. 305

If ID 521 is still not resolved

The manual gives no further instruction for this code. Open the code table in the PDF or contact Danfoss service.

Open the manual at page 305 All 100 FLOW error codes Manual details & download

This page summarises what the manufacturer’s manual says about ID 521; 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 Danfoss. Found a mistake? Report an error.