Grundfos MAGNA1 C Series - 9.5 Warning 77, twin-head pump

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9.5 Warning 77, twin-head pump
A yellow Grundfos Eye in a twin-head pump system often means
that the two heads have lost connection to each other, warning
77. This is often intermittent and caused by external disturbance,
or because one of the heads has lost power.
The warning is shown immediately and triggers the fault relay
after one hour. If communication is re-established, the warning is
automatically reset.
9.5.1 Activating and deactivating the fault relay
It is possible to choose whether warning 77 should trigger the
fault relay or not. This is done in Grundfos GO. For instructions
on how to connect the pump to Grundfos GO, see section
8.3 Connecting the pump to Grundfos GO Remote.
Step Action Illustration
1
Choose
"Settings" in the
Grundfos GO
Remote
dashboard.
TM06 8584 0817
2
Choose
"Warning 77
relay settings".
TM06 8583 0817
3
By default the
fault relay
setting is
activated.
To disable the
setting, choose
"Do not activate
relay".
Press "OK".
MAGNA1_warning77
Step Action Illustration