Grundfos CUE Error 77: Communication fault, duty/standby

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

Alarm code77

The Grundfos CUE experienced a communication fault between duty and standby modes. The manual lists no action for this code.

Model
Grundfos CUE
Display shows
Communication fault, duty/standby (77)
Type
Alarm code
Source
Manual p. 38

What 77 means

Communication fault, duty/standby p. 38

If 77 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 77; 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.