In this module, you will gain practical insight into how to interpret troubleshooting issues. It will cover specific warnings and alarms and provide you with the knowledge required to help diagnose issues.

When a pump problem occurs, troubleshooting can be time-consuming. A lack of heat often leads to call backs and identifying the problems can be a long process which you may not be able to invoice. Alpha and UPSe pumps have been designed with intuitive troubleshooting, warning, and alarm functions to help you quickly and easily identify and overcome pump problems.

The Alpha and UPSe pump displays can show a yellow or red LED light: YELLOW means warning. Pump running but attention may be needed. RED means alarm. Pump stopped.

Let’s take a closer look at some specific warnings and alarms. On the Alpha pump the dry run alarm can be indentified by a red eye light and the value E4 on the display. Whereas on the UPSe pump it can be identified by the red LED flashing four times. If the pump runs without water, the dry run protection feature will stop the pump automatically to prevent damage. The pump will try to restart a certain number of times to detect if water has returned.  

If the pump fails to restart after several tries, it means the system still contains too much air. You will need to make sure that there is sufficient liquid in the system. The pump blocked alarm will stop the pump. On the Alpha pump this is shown as a red eye light and the value E1. While on the UPSe pump it is displayed by the red LED flashing once. To remedy this alarm, consider checking the system for impurities and remove any that may be found. The under voltage warning can be identified on the Alpha pump by a yellow eye light and the value E2.

On the UPSe pump it is displayed with the LED flashing twice. It means that the voltage provide in the grid is too low which results in the pump not performing as expected. Action is only needed if the heating system is underheating or delivering discomfort. To remedy this warning, make sure the supply voltage is within the specified range.

For the Alpha pump you can access the event log via the Grundfos GO app. And for each event there will be suggestions for how to remedy the issues.

That covers our overview of troubleshooting, warnings, and alarms.