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 > Humming sound in 5th wheel??

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dougrainer

Carrolton, Texas

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Joined: 06/11/2007

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Posted: 10/22/20 01:37pm Link  |  Quote  |  Print  |  Notify Moderator

Old-Biscuit wrote:

Xantrex Pro XM1000 is an 'INVERTER' used to inverter DC (from batteries) to AC for that residential fridge

'CONVERTER' used to converter AC from AC Source (shore/gen) to DC for the 12V System and maintaining/charging batteries


You could have BOTH...Inverter and Converter

If you unplug shore power then Converter will stop operating --- Converter Fan
Should stop as it is AC Powered

If you turn off Inverter....then it will stop
Inverter Manual

Determine which one is making the noise.
Humming could be 'Normal' or an indication of component failing


Are you positive about the CONVERTER fan is AC? Some Converter fans will stay running once the 120 is removed if the converter is hot enough for the fan to run. Doug

mrad

Prineton, MN

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Posted: 10/22/20 04:53pm Link  |  Quote  |  Print  |  Notify Moderator

12th Man Fan wrote:

If you are rigged for a generator then I would suspect the ATF(auto transfer switch).


I am rigged for and do have an Onan 5500. I just tried turning both battery switches off and the humming sound was still there.

12th Man Fan

Flower Mound , Texas

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Posted: 10/22/20 05:05pm Link  |  Quote  |  Print  |  Notify Moderator

mrad wrote:

12th Man Fan wrote:

If you are rigged for a generator then I would suspect the ATF(auto transfer switch).


I am rigged for and do have an Onan 5500. I just tried turning both battery switches off and the humming sound was still there.


Unplug from shore power and see if it stops.


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time2roll

Southern California

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Posted: 10/22/20 05:07pm Link  |  Quote  |  Print  |  Notify Moderator

Turn off the breakers one at a time. Main breaker(s) last. Then unplug.


2001 F150 SuperCrew
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