Grundfos MAGNA3 Pumps
10 fault codes documented
Alarm 10 — Internal fault, circuit board connection lost
The pump has detected an internal fault where different circuit boards inside the pump have lost connection to each other. This is a critical internal error.
Alarm 51 — Blocked pump, pump stops and tries to restart
The pump has detected that its rotor is blocked, causing it to stop operation. It will automatically attempt to restart. This can happen if the pump has been inactive for a long time.
Alarm 72 — Internal fault, pump stops and tries to restart
The pump has detected an internal fault, causing it to stop operation and display a red light. It will automatically attempt to restart. This can be caused by unusual flow patterns or power issues.
Grundfos Eye indicates a pump alarm
The Grundfos Eye status indicator light is showing an alarm. This signifies a critical fault that may have caused the pump to stop or prevent it from running. Immediate action is usually required.
Grundfos Eye indicates a pump warning
The Grundfos Eye status indicator light is showing a warning. This means the pump is operating outside optimal parameters or an issue requires attention, but the pump may still be running.
Grundfos Eye LED flashing - Bluetooth connection in progress, but not connecting
When you try to connect your Grundfos MAGNA3 pump to the Grundfos GO Remote app, the center LED of the Grundfos Eye flashes. This means the pump is looking for a Bluetooth connection. If the LED keeps flashing and doesn't become solid, it indicates a problem establishing the connection.
External Alarm Signal Activated - Pump has registered a fault
The pump's external signal relay (Relay 1, if configured as Alarm) has activated, indicating that the pump has registered a fault. This signal is typically sent to an external building management system (BMS) or alarm panel.
External Ready Signal Not Activated - Pump has registered a fault and cannot run
The pump's external signal relay (Relay 2, if configured as Ready) is not activated, indicating that the pump has registered a fault and is unable to run. This signal is typically sent to an external building management system (BMS) or control panel.
Warning 77 — Multi-pump communication lost
The two pumps in a multi-pump system have lost their radio connection with each other. Both pumps will continue to operate based on their own local settings.
Warning 88 — Internal sensor fault
The pump is detecting an issue with its internal sensor. It will continue to operate, but a yellow light will indicate this warning. The sensor might be blocked or faulty.