Fan Noise Solution - Dutchmen Owners

Go Back   Dutchmen Owners > Dutchmen Brand RVs > Toy Hauler
Click Here to Login
Reply
 
Thread Tools Display Modes
 
Old 03-27-2013, 12:14 PM   #1
Senior Member
 
hitman007's Avatar
 
Join Date: Nov 2012
Location: Orlando
Posts: 55
Florida
Fan Noise Solution

On my Voltage 3950, when I am plugged into shore power and running all the interior lights I hear a fan humming noise. I isolated the noise to something running a cooling fan behind a panel that you access from the front storage bay I think? (Behind the water/Cable tV/ Dump valve panel). Anyone know what is back there running a fan? It must have something to do with power? What ever it is it needs some sound deadening put around it. That may be my next project.
__________________

hitman007 is offline   Reply With Quote
Old 03-27-2013, 02:38 PM   #2
Member
 
D-Maxx's Avatar
 
Join Date: Mar 2013
Location: Taber
Posts: 21
Alberta
Your inverter maybe ??
__________________

D-Maxx is offline   Reply With Quote
Old 03-27-2013, 02:53 PM   #3
Senior Member
 
Wanderer's Avatar
 
Join Date: May 2012
Location: Nanaimo
Posts: 488
British Columbia
Yes, it's the inverter.
__________________
Gordon and Laura Howe
Vancouver Island, British Columbia
2010 Komfort Resort 240RK
Wanderer is offline   Reply With Quote
Old 03-27-2013, 03:26 PM   #4
Member
 
Join Date: Nov 2012
Location: Centennial
Posts: 33
Colorado
If you hear the fan while you are plugged into shore power, it is most likely the fan on converter/charger that you are hearing. The more 12 volt accessories you are using, the more energy is flowing through the converter. An inverter changes 12 volt battery power to 110 volt power to operate microwave, TV, hair dryer, etc. when you are not plugged into shore power. You will need to be careful if you insulate the converter, because to much heat around the converter could cause it to fail.
If it bothers you, I would add insulation to the panels of the compartment, not to the converter itself. In my 3200, the converter (which I can hear when the fan is running) is under the front bedroom.
Dirt1st is offline   Reply With Quote
Old 03-27-2013, 04:00 PM   #5
Member
 
Join Date: Nov 2012
Location: Centennial
Posts: 33
Colorado
I forgot to add that the the reason the converter fan is running is because the converter is stepping down and converting the 110 volts AC of shore power to 12 volts DC to run the lights, water pump, furnace fan and other 12 volt demands along with charging the house batteries.
Dirt1st is offline   Reply With Quote
Old 03-27-2013, 04:10 PM   #6
Senior Member
 
Join Date: Apr 2012
Location: Kamloops,
Posts: 628
British Columbia
You would think the "humming" noise would be one of the basic "walk through items"'with any new TT owner.

Coops.
__________________
2012 Dodge 3500 Laramie Crew Cab: Cummins: exhaust brake: tow haul:
Kamloops
British Columbia
Canada
Cooper is offline   Reply With Quote
Old 03-27-2013, 04:17 PM   #7
Member
 
D-Maxx's Avatar
 
Join Date: Mar 2013
Location: Taber
Posts: 21
Alberta
Here is a question... Now is a guy suppose to shut off the converter breaker in order to run the inverter ?
D-Maxx is offline   Reply With Quote
Old 03-27-2013, 04:20 PM   #8
Senior Member
 
eightydo's Avatar
 
Join Date: Nov 2012
Location: Las Vegas
Posts: 592
Nevada
Fan on converter is going bad (Bearings) some fans motors have been known to be bad when installed or soon after. These are usually stepper motors. Replacement fans can be found at electronic supply stores .
eightydo is offline   Reply With Quote
Old 03-27-2013, 04:22 PM   #9
Member
 
D-Maxx's Avatar
 
Join Date: Mar 2013
Location: Taber
Posts: 21
Alberta
From what I under stand if you leave the converter on while running the inverter it is like a vicious cicle
D-Maxx is offline   Reply With Quote
Old 03-27-2013, 11:41 PM   #10
Senior Member
 
flyingdutchmen0625's Avatar
 
Join Date: Nov 2012
Location: new lenox
Posts: 76
Illinois
sounds messy ear plugs?
flyingdutchmen0625 is offline   Reply With Quote
Old 03-28-2013, 03:17 PM   #11
Member
 
Join Date: Nov 2012
Location: Centennial
Posts: 33
Colorado
D-Maxx, you do not need to do anything to the converter if you are using the inverter. The inverter and the converter are two separate systems and I believe only one at a time will operate, depending on the power source your are using. The converter operates when you are plugged in to shore power, or are running a generator by converting 110 volts AC to 12 volts DC to charge the battery set and provide 12 volts DC to the lights, water pump, furnace fan and the circuit boards for the fridge and water heater when they are runing on propane.

When you are not connected to shore power or running a genny, a transfer switch switches from the main 110 volt breaker panel to the inverter, which draws 12 volt DC power from the battery set and "inverts" it to 110 volts AC which then will power the microwave, TV, hair dryer, etc.

Unless you have a very high end big rig, it is unlikely that you have an inverter, unless you installed it yourself. Using an inverter to provide 110 volt AC power from a battery set requires a pretty substantial battery set, probably a minimum of 4-225 amp hour 6 volt "golf cart" type batteries.

A 1000 watt microwave draws about 9 amps on a 110 volt circuit. That translates to about an 80 amp draw on a 12 volt system that supplies the inverter
Dirt1st is offline   Reply With Quote
Old 03-28-2013, 05:23 PM   #12
Member
 
D-Maxx's Avatar
 
Join Date: Mar 2013
Location: Taber
Posts: 21
Alberta
I have 2 6 volt golf cart batteries one single solar panel and 4000watt inverter.
When I want to use the inverter to run stuff in the trailer ( no generator ) ill turn the inverter on and the batterie life jumps to full if I shut the breaker off to the converter the batterie life dies down a bit. It seems like it charging its self. !?
My question is why does it do that?
I was told to shut off converter breaker cause the inverter is changing dc to ac and running it back through the converter back to the batteries
It just don't make sence to me at all why I have to shut the breaker off in order to run the power the inverter.
D-Maxx is offline   Reply With Quote
Old 03-29-2013, 10:29 PM   #13
Member
 
Join Date: Nov 2012
Location: Centennial
Posts: 33
Colorado
What you are describing is beyond my level of knowledge. To me it soulds like you have a transfer switch that is not working, but that is just a wild guess on my part. Have you gone to RV.net and posted in the electrical section? There are some very knowledgeable folks that post there.
Dirt1st is offline   Reply With Quote
Old 04-13-2013, 03:08 PM   #14
Senior Member
 
sundancer 87's Avatar
 
Join Date: Dec 2012
Location: Tahlequah
Posts: 2,842
Oklahoma
The descriptions of the inverters and converters have been stepping on each other in this thread.

To clarify, an inverter will change your 110 volt AC to 12 volt DC regardless from where the 110 volt AC originates.

Conversely, a converter will change your 12 volts DC to 110 volts AC. The 12 volts DC will most commonly come from a battery bank.
sundancer 87 is offline   Reply With Quote
Old 01-05-2014, 03:05 AM   #15
Member
 
Join Date: Aug 2013
Location: USA
Posts: 28
Texas
My inverter is mounted on a piece of wood and the wood is screwed to one of the aluminum floor supports under the bedroom The metal housing on my inverter is actually is touching the aluminum support, so when the fan is on it is transferring the harmonics of the fan to the aluminum support and it can be heard very easily. The aluminum is acting kind of like a speaker.

I grabbed this photo from another members post, the inverter is the grey box that is kind of hanging cockeyed in the center of the photo.

My solution it to find an alternate location where I could relocate the inverter and use some rubber feet or mounts to isolate the vibration.

I bet this will fix it more gooder.
Attached Thumbnails
Click image for larger version

Name:	image.jpg
Views:	67
Size:	49.6 KB
ID:	781  
Heywodja is offline   Reply With Quote
Old 01-05-2014, 12:34 PM   #16
Senior Member
 
Join Date: Nov 2012
Location: Goshen
Posts: 363
Indiana
Quote:
Originally Posted by Heywodja View Post
My inverter is mounted on a piece of wood and the wood is screwed to one of the aluminum floor supports under the bedroom The metal housing on my inverter is actually is touching the aluminum support, so when the fan is on it is transferring the harmonics of the fan to the aluminum support and it can be heard very easily. The aluminum is acting kind of like a speaker.

I grabbed this photo from another members post, the inverter is the grey box that is kind of hanging cockeyed in the center of the photo.

My solution it to find an alternate location where I could relocate the inverter and use some rubber feet or mounts to isolate the vibration.

I bet this will fix it more gooder.
You bet it will. I didn't have an issue but, wanted to be nosey and see what was on the other side of the wall in the basement.

Fortunately, out of all the unfortunate things done on my rig, the inverter was mounted with rubber feet on the floor. We might hear the fan run, if we're listening, once in a while.

Also, since I installed (2) deep cycle batteries it doesn't have to work like it did. My rig was delivered to me with (1) car battery, not even a deep cycle. That converter ran constant. It was awful when we traveled and dry camped over night.......couldn't bring in the bedroom slide the next morning. Had to jump the battery with my truck battery.
__________________
Dave

2012 Dutchmen 3850RL
Infinityrver is offline   Reply With Quote
Old 01-05-2014, 10:27 PM   #17
Senior Member
 
Join Date: Dec 2011
Location: Helena, MT
Posts: 459
Montana
Quote:
Originally Posted by D-Maxx View Post
I have 2 6 volt golf cart batteries one single solar panel and 4000watt inverter.
When I want to use the inverter to run stuff in the trailer ( no generator ) ill turn the inverter on and the batterie life jumps to full if I shut the breaker off to the converter the batterie life dies down a bit. It seems like it charging its self. !?
My question is why does it do that?
I was told to shut off converter breaker cause the inverter is changing dc to ac and running it back through the converter back to the batteries
It just don't make sence to me at all why I have to shut the breaker off in order to run the power the inverter.
I bolded above the behavior you are witnessing. Your converter takes 120V AC shore power and converts it to 12V DC power to run all 12V items and charge the 12V batteries. The inverter takes 12V DC power from the batteries and changes it to 120V AC power. If you don't turn off your converter, the inverter will supply 120V AC power to it and it will therefore do what it is supposed to do and convert it to 12V DC and try and charge the battery. The issue is that the battery can't actually charge itself. You are converting 12V DC to 120V AC and back to 12V DC, with power losses due to inefficiency during each conversion. This will drain your batteries quickly.

High end units use a single unit that is both a converter and inverter in one unit, commonly known as an inverter/charger. It has an internal transfer switch and knows to not try and charge itself with its own batteries.
__________________

__________________
2012 Aspen Trail 2710BH | 280 watts of solar on the roof | 2x6V GC batteries | 100% LED lighting | 1500 & 300 watt PSW inverters | so far strictly boondocking
ewarnerusa is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by Dutchmen RV or any of its affiliates. This is an independent, unofficial site.


All times are GMT. The time now is 05:36 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Copyright 2012 Social Knowledge, LLC All Rights Reserved.
×