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Hi I got a bit confused with the COM terminology thinking it was the same as Neutral so I got a mate to sort it for me. However, I am sending some pics which I hope will help and an explanation of how mine is wired up. From Grundfoss wiring center the bottom right vertical connector block L and...

His problem might be but I thought it might be usefull for someone else searching for the same problem in the same way as I was searching help. Just trying to help.

I also have a pump plan. Great idea pity grundfoss didn't support it better. However, I had a problem also with the wiring centre. The fix was relatively easy depending on your skil level and equipment available. The pump plan pcb is pretty basic with not much to go wrong actually. Assuming the...