Grundfos MAGNA3 Bedienungsanleitung Seite 9

Alarms and warnings
Warning 88 – Internal sensor fault
• The pump will continue operation with a yellow light
indicating the warning.
• The internal sensor is either blocked due to impurities in
the media, or the communication from the sensor is faulty.
• Make sure the sensor and the measuring channels
in the pump house are not blocked.
• Replace the sensor if the error persists or disable the alarm
under the settings menu if the reading is not needed and the
product is running in open loop control (Constant curve).
Warning 77 – Multi-pump communication
• Both pumps in the multi-pump system will continue
to operate according to their local settings.
• The error is caused by the two pumps losing
their radio connection.
• The pumps will search for each other and pair
automatically again after reestablishing the connection.
• Make sure both pumps are supplied with power. If the
multi-pump system is not desired, dissolve it under
the "assist" menu.
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Alarm 72 – Internal fault
• The pump will stop and display a red light, but automatically try to restart.
• There might be turbine flow in the application, forcing a flow through the pump.
• Irregularities in the voltage supply can also cause this alarm.
• Check the application and take necessary measures to avoid turbine flow.
• If the alarm persists, contact Grundfos Service.
Alarm 51 – Blocked pump
• The pump will stop, but automatically try to restart.
• Make sure the rotor is not physically blocked
(e.g. after being turned off for extended periods of time).
• If the error persists, contact Grundfos Service.
Alarm 57 – Dry run
• The pump will stop with a red light.
• The pump has detected that there is no media in the system.
• Another reason for this error can be that the sensor is blocked and
therefore is measuring an incorrect pressure. See also warning 88.
• This alarm can be disabled/enabled under the settings menu.
It is default disabled on model B/C pumps.
Alarm 10 – Internal fault
• This error can occur if different print circuit boards in the pump
have lost connection to each other.
• Please contact Grundfos Service.
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