Grundfos alpha 2L running issue

[WayneWindsor]

Good afternoon we have recently had a grundfos alpha2L 15-60 130 pump fitted to our central heating system and we're experiencing an issue.
Once the pump is on its working fine but for the first "cycle" in the morning the "Power on" light comes on but the pump doesn't start. I have to then disconnect the mains from the pump and plug it back in and it then kicks in and the pump starts to work fine!!!.
It works okay all day coming on and off at varied prolonged intervals.
Any ideas or help much appreciated.
Thanks Wayne

 

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