FAQ
Question: Why does the following "--" appear on the operating panel’s watt display on ALPHA1 or ALPHA2, and what is the remedy?
Answer:
Possible cause of fault
Error in power supply cable
Improper voltage and/or frequency
Blockage of impeller
Air inclusion in the pump
Electronic fault
Remedy
These faults can only be remedied by a specialist company. Please contact your local specialist technician.
Additional information:
Enhance your knowledge
Find out how to get reduced energy consumption, increased comfort and unsurpassed operational reliability for your application. Read our customers' stories about how they benefit from the Grundfos approach to intelligence, water and energy, or search Grundfos research & insights for more learning materials, articles, white papers, videos and much more that benefit your solution.