Install & Operate
Ensure that your system functions at its best from day one. Find how-to guides, videos, FAQs and related services to help you with installation and operation of your Grundfos products.
Why does E1 appear on the operating panel’s watt display on ALPHA1 or ALPHA2, and what is the remedy?
Possible cause of the fault
The rotor is blocked
Try to remove deposits by lightly tapping on the pump
Shut off the pump on the medium side, remove the pump head and remove deposits (Such work must only be performed by a specialist company)
Why does E3 appear on the operating panel’s watt display on ALPHA1 or ALPHA2, and what is the remedy?
Possible cause of fault
Have the pump replaced by a specialist company
Why does the following "--" appear on the operating panel’s watt display on ALPHA1 or ALPHA2, and what is the remedy?
Possible cause of fault
Error in power supply cable
Improper voltage and/or frequency
Blockage of impeller
Air inclusion in the pump
These faults can only be remedied by a specialist company. Please contact your local specialist technician.
Can the pump be operated using a frequency converter?
Grundfos offers numerous speed-controlled pumps that are referred to as ‘E-pumps’ and which come equipped with Grundfos MGE motors with an integrated frequency converter. The manufacturing costs and material inputs are lower compared to pump solutions with external frequency converters. In addition, technical issues that may arise in connection with external frequency converters are avoided.
Finally, MGE motors have numerous additional features and advantages. In the event ...
Do I have to follow the instructions for Grundfos pumps?
Yes, absolutely. The installation and operating instructions contain basic instructions which must be followed in connection with the installation, operation, and maintenance of the system. Hence, they must be read by the installer and the relevant personnel/owner prior to installation and commissioning. In addition, they must be available to personnel on site at all times.
Does the built-in excess temperature protection of the UPS pump need to be used?
If excess temperature protection is not properly connected or bridged, the pump may be permanently damaged. In addition, this will also void the pump's warranty.
Grundfos Commissioning for me is top performance from day one
Grundfos specialists make sure that your system and pumps are fully compatible, that all pumps are installed and aligned correctly, and that the system is ready to go.
Prompt and reliable service wherever you are
With Grundfos service centres in more than 50 countries throughout the world, supplemented by more than 600 authorised Grundfos Service Partners, we’re never far away. If required, we ensure you get emergency access to service personnel as well.