Grundfos CUE Error 91: Temperature sensor 1 outside range

CUE frequency converter · taken from the manufacturer’s manual, pages cited

Alarm code91

The Grundfos CUE detected Temperature Sensor 1 reading outside its valid range. The manual lists no action for this code.

Model: Grundfos CUE
Display shows: Temperature sensor 1 outside range (91)
Type: Alarm code
Source: Manual p. 38

Meaning
Still not solved
Source

What 91 means

Temperature sensor 1 outside range p. 38

If 91 is still not resolved

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

Open the manual at page 38 All CUE error codes Manual details & download

This page summarises what the manufacturer’s manual says about 91; 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 Grundfos. Found a mistake? Report an error.