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Just had my ufh pump changed and now my boiler makes this noise.. How do I fix this? Is there air in the system.

Hi all I have a grundfos ups2 as pictured below. Went in holiday for 2 weeks and came back but the green lights don't light up? Does that mean no power goes to it? Thermostats seem to work fine. Checked to see if it was seized up and seems to turn freely with my screwdriver. Any help appreciated