I know some of you guys here are "electrical" guys and hope someone might be able to help.
My equitech 7.5q balanced power unit has a 40amp 240volt input. It works great. Lately between 9 and 11pm there is a loud buzz from it which can be heard throughout the room. I don't have anything on a timer in the house or any other device which operates specifically at those times.
I called the power company and they sent someone to analyze the power from the transformer supplying my house. I asked them to check for dc, harmonics, etc... I was told my power was fine and that the 3 legs of the supply were in balance. Of course they came during the day, not at night when it acts up. They did offer to send someone out between 9 and 11pm so I'm waiting for that. I might call Equitech and ask them for advice.
Any of you guys have thoughts/suggestions about what might be going on and how to resolve the issue? I did disconnect the coaxial cable line and it made no difference.
thanks.
My equitech 7.5q balanced power unit has a 40amp 240volt input. It works great. Lately between 9 and 11pm there is a loud buzz from it which can be heard throughout the room. I don't have anything on a timer in the house or any other device which operates specifically at those times.
I called the power company and they sent someone to analyze the power from the transformer supplying my house. I asked them to check for dc, harmonics, etc... I was told my power was fine and that the 3 legs of the supply were in balance. Of course they came during the day, not at night when it acts up. They did offer to send someone out between 9 and 11pm so I'm waiting for that. I might call Equitech and ask them for advice.
Any of you guys have thoughts/suggestions about what might be going on and how to resolve the issue? I did disconnect the coaxial cable line and it made no difference.
thanks.