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Old 05-30-2019, 12:39 PM   #1
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Electrical buzz

Is it common to hear a buzz coming from breaker box inside the trailer when connected to shore power.
Also my converter fan seems to run most all the time with no systems on other than charger.
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Old 05-30-2019, 12:43 PM   #2
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Welcome to the forum!

It will help if you could ID the model/year/length etc. of your Airstream IMO. If you know what converter you have that would also be good to know.

Good luck,

Peter
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Old 05-30-2019, 12:59 PM   #3
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Electrical buzz

Have you checked the battery?
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Old 05-30-2019, 01:16 PM   #4
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Quote:
Originally Posted by Stevenb View Post
Is it common to hear a buzz coming from breaker box inside the trailer when connected to shore power.
Also my converter fan seems to run most all the time with no systems on other than charger.
More information is require.

Some Airstreams have a power center, 12v and 120v in the same device. If your 120v breaker box is at the same location as the 12v fuse panel, then you are probably hearing the converter that is adjacent, part of the device.

Some Airstreams have an power center that is a 120v breaker box (similar to residential), and a completely separate 12v fuse/breaker panel. If you have the residential type breaker box, it should not be humming.

The converter fan is turned on by a thermostat. If it is hot it runs.

Checking the battery to make sure it is not dry is good advice. Turn power off first, if dry and it is overcharging it might explode
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Old 05-30-2019, 02:45 PM   #5
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Sorry of course you would need more info. 2017 25 FBT. converter is a boondocker 1260 HD batteries are two 6 volt full River?? wired in series. I have been having great luck with this set up until just recently. I suspect a power parasite that I can not find. converter fan runs a lot and unit is I think too warm. I just pulled the converter out and hooked it up in the shop puts out 13.8 DCV and fan run time is reasonable. My question is how do I determine where the power is going? Batteries are only about 4 mo old but I'll have them checked tomorrow. they died overnight for no apparent reason.
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Old 06-03-2019, 01:21 PM   #6
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Batteries that die overnight suggest a serious problem, as you probably recognize, starting with defective batteries. Good you are having them tested.

Good luck,

Peter
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Old 06-04-2019, 07:35 AM   #7
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power systems with coils, chokes, inductors and/or transformers often produce hum. this is is NOT a sign of an issue. its just the physics of energy conversion and how the iron reacts

often the higher the load (W), the loader the sound
think of the pole or ground mounted transformers . you can often hear them with their 60hz hum.

seque: a dead battery is another problem. you should find out what the issue is as it could be the battery or the charging system
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Old 06-05-2019, 08:21 AM   #8
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Up date and lessons learned-the hard way. Last time I disconnected I inadvertently pulled the brake controller at the hitch apart so the brakes were engaged. I didnít know it had come apart and was one of the last things I checked. Two 6 volt full river batteries, shot. Wonít hold a charge as they got too low. Re-engaged the brake, and put new batteries in and Iím good to go. A lot smarter and a little poorer for the experience.
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