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Old 08-27-2014, 09:06 AM   #1
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High pitch tone - breaker panel

The past 2 times we've camped (we had electrical hook-up both times), upon connecting power to our TT, my family noted a very high pitch tone coming from the breaker panel. It wasn't loud, but loud enough that we all could hear it and annoy us. I flipped the main breaker off in the TT panel and it stopped. When I flipped the breaker back on, the tone came back. After a few minutes of putting up with this noise, it stopped and never came back for the remainder of our camping trip. At the time this happened, no accessories (microwave, A/C) were on.

What I described above happened both times we camped.

I did have the following Surge / Voltage Protector connected:

http://www.progressiveindustries.net/ems_pt30c.htm

Any thoughts on what might be causing this?
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Old 08-27-2014, 09:43 AM   #2
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I had to have my converter changed out due to this same problem. Under warranty of course. Mine happened under load and when the converter was in full charge and med charge mode, not float. Under float it would go away.

It's a squeal that is electronic in origin and not a fan. Didn't matter where I plugged in as it occured at home, at the dealer and while at the cg.
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Old 08-27-2014, 11:27 AM   #3
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Just a couple of thoughts 1. You said it stopped when you flipped off the main i wonder if you left the main on and turned off the individual breakers off one at a time to see if it is an indivdual item thats causing it 2. Since it quit after a while i wonder if it might be the fan not working intermittantly. Just my two
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Old 08-27-2014, 11:30 AM   #4
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Quote:
Originally Posted by Kellys View Post
Just a couple of thoughts 1. You said it stopped when you flipped off the main i wonder if you left the main on and turned off the individual breakers off one at a time to see if it is an indivdual item thats causing it 2. Since it quit after a while i wonder if it might be the fan not working intermittantly. Just my two
I will look further into it by doing what you said. Thanks!!
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Old 08-27-2014, 01:06 PM   #5
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AC breakers can sometimes make buzzing noises including high pitch noise due to vibration from the AC signal. If the inverter has rectifiers this can also cause high frequency noise. If the noise is coming and going it may the load on the system/breaker. I don't have a direct answer for you but if it's annoying then it should be checked to make sure it isn't something that's going to fail while you're on a trip(no pun intended).
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Old 08-28-2014, 09:11 PM   #6
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I've had the same problem...I'm going to have it checked by my dealer now. Happens every time I use the rig. Really annoying. I agree.
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Old 08-29-2014, 12:19 AM   #7
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Is it the invertor converting from AC to dc? I had a whine coming from it until I swapped out halogens for led lights and the power draw lowered and the invertor didn't have to work as hard.
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Old 08-29-2014, 05:32 AM   #8
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High pitch tone - breaker panel

Quote:
Originally Posted by jsundin View Post
Is it the invertor converting from AC to dc? I had a whine coming from it until I swapped out halogens for led lights and the power draw lowered and the invertor didn't have to work as hard.

Inverter converts DC to AC, Converter makes DC into AC. Both make noise and. Generate heat.
I am having trouble following this thread.

Most rv's come standard with some type Converter. Inverters are usually added aftermarket.
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Old 08-29-2014, 06:49 AM   #9
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Its the converter mounted with the breaker panel. My inverter is mounted in my basement and I have no noise there. It happens when I have little or no load.
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Old 08-30-2014, 03:14 PM   #10
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Guess from all the responses that something might be wrong, I should have had mine checked out while it was still under warranty. My DS swears mine squeals enough to bother him. My older ears don't hear it. I just thought he had sensitive ears.
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