ATS Noise

[nhake01]

We have noticed that the ATS is making a "humming" noise continuously in our 2018 Precept 35S. Is this normal? I know we have some master electricians and electrical engineers on this forum. Thank you for comments and advice.

[Grumpy]

Yes that can be a common issue with an ATS. What you are hearing is the AC hum on the coils holding the contactors down. When you change locations and plug into a different power grid it may go away.

The only way to eliminate it totally is to buy an ATS that uses DC coils

[Kevin Cooper]

Check it for loose electrical connections and loose screws holding components to enclosure and enclosure to RV.