Grundfos ALPHA CS - Fault Indication on the Pump Operating Panel; Overview of Alarm and Warning Codes

12.1 Fault indication on the pump
operating panel
Faults preventing the pump from operating
properly are indicated on the operating panel with
Grundfos mini Eye turning either yellow or red and
the display showing an error code.
A warning is indicated when one indicator light in
Grundfos mini Eye is turning yellow and
rotating. The pump does not perform as expected,
and action is required in case of underheating or
discomfort.
An alarm is indicated when two indicator lights in
Grundfos mini Eye are flashing red and the pump
stops. Action is required.
Grundfos
mini Eye
Description
Warning indication
Alarm indication
12.2 Overview of alarm and warning
codes
Fault chart
Grundfos
mini Eye
Code in
Grundfos GO
Fault
51 Blocked motor
40 Undervoltage
29
Forced
pumping
4 Overvoltage
72 Internal fault
76 Internal fault
85 Internal fault
57 Dry running
43
Impellers
forced forward
35 Air in media
20
English (US)