Danfoss 100 FLOW Error 51: Device External Fault

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

Fault code51

Device External Fault occurs when a user-defined digital input is activated, requiring checking the digital inputs and schematics. The manual's first action is: “This is a user-defined fault. Check the digital inputs and schematics.”

Model
Danfoss 100 FLOW
Display shows
Device External Fault (51)
Type
Fault code
Source
Manual p. 309

What 51 means

Device External Fault p. 309

Common causes

  • The digital input signal that is set with parameter P3.5.1.11 or P3.5.1.12 was activated. p. 309

What to do

  1. This is a user-defined fault. Check the digital inputs and schematics. p. 309

If 51 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 309 All 100 FLOW error codes Manual details & download

This page summarises what the manufacturer’s manual says about 51; 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.