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05-16-2019, 07:09 AM
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#1
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Senior Member
Join Date: May 2019
Location: Scottsdale
Posts: 138
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Inverter question
We have a magnum Dimensions 2012 CSW series pure sine wave inverter in our 2019 3120RL. fifth wheel. Plus we have two solar panels on roof. All factory installed. I noticed every once and awhile a loud hum coming from where inverter is mounted. Can’t ever catch a look at the LED status when it does. Tried turning on all the lights to force it on. In the manual it says to plug a load into it and hold the power button one second, it should come on and flash battery voltage. At first it flashes between E00 and L01. Then after a few minutes it started show battery voltage at 13.6 to 13.8. So it seems to work. But no hum. On the LED readout of solar it reads same voltage. It “seems” to be working just every once and awhile it hums.
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05-16-2019, 07:47 AM
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#2
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Site Team
Join Date: Mar 2011
Location: Gaylord
Posts: 26,995
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There are two cooling fans mounted on the back face of your inverter. Any chance that the fan blades are dirty, have pet hair, etc on them? Those are essentially "pancake computer fans" and will hum when the blades are dirty/off balance.
__________________
John
2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
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05-16-2019, 07:50 AM
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#3
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Senior Member
Join Date: May 2019
Location: Scottsdale
Posts: 138
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I did check them, but It is a brand new RV couldn’t be dirty after only using the unit twice. But thanks for the tip.
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05-16-2019, 08:34 AM
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#4
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Site Team
Join Date: Mar 2011
Location: Gaylord
Posts: 26,995
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Quote:
Originally Posted by Mroe67
I did check them, but It is a brand new RV couldn’t be dirty after only using the unit twice. But thanks for the tip.
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Don't tell that "two trip with a new trailer so it can't be dirty" story in other threads currently being discussed on this forum. One "new owner" found sawdust, spare chunks of trim, Styrofoam, etc in all his cupboards, behind furniture and in the drawers. Another owner found "construction debris" in his cold water plumbing lines. It had blocked the strainer in his toilet flush valve.
To believe that Keystone "cleaned your trailer and vacuumed the storage compartments to prevent strands of fiberglass, sawdust and carpet fibers from getting into your inverter fan, well, I wouldn't want to "bank on it being clean from the factory".... YMMV
__________________
John
2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
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05-17-2019, 06:12 PM
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#5
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Senior Member
Join Date: May 2018
Location: Oregon
Posts: 1,138
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Quote:
Originally Posted by JRTJH
Don't tell that "two trip with a new trailer so it can't be dirty" story in other threads currently being discussed on this forum. One "new owner" found sawdust, spare chunks of trim, Styrofoam, etc in all his cupboards, behind furniture and in the drawers. Another owner found "construction debris" in his cold water plumbing lines. It had blocked the strainer in his toilet flush valve.
To believe that Keystone "cleaned your trailer and vacuumed the storage compartments to prevent strands of fiberglass, sawdust and carpet fibers from getting into your inverter fan, well, I wouldn't want to "bank on it being clean from the factory".... YMMV
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LOL! I’ve had mine a year and sawdust still finds its way out from somewhere every time I move it
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05-17-2019, 06:48 PM
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#6
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Site Team
Join Date: Feb 2014
Location: W. Texas
Posts: 17,688
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I guess we've been lucky. We did see remnants of sawdust and debris when we got the trailer but haven't had any issues with it. I do however, for some strange reason, sneeze and cough at night constantly trying to clear my mouth/nose. In the AM I have to hit the bathroom and wash my face/clean my mustache/beard/nose hair. I always find debris there along with puppy fur; DW said she doesn't need a vacuum.....my snoring seems to eliminate that need...... 
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Danny and Susan, wife of 56 years
2019 Ram 3500 Laramie CC SWB SB 6.4 4x4 4.10
2020 Montana High Country 331RL
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05-18-2019, 01:47 AM
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#7
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Senior Member
Join Date: Apr 2015
Location: nm
Posts: 1,833
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Poor connection causing a relay to chatter battery voltage should be constent if it's wired correct. Have you got on off button for the inverter in side ?
__________________
2018 1 ton 4x4 c.c standard bed GMC Denali
Anderson ultimate hitch
2015 311 Impact Fusion toy hauler
2018 Milwaukee 8 FLRTU roadglide glide ultra
2018 800 Z force spot BUGGY. 
500 watts of solar enough power for boon docking.
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05-18-2019, 05:24 AM
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#8
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Senior Member
Join Date: May 2019
Location: Scottsdale
Posts: 138
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When we were at the camp site I think we might have had points of time where the voltage dropped very low. I noticed during the night even loosing power twice. That may have triggered an issue with the device. I did double check the fans they were clean
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05-18-2019, 06:27 AM
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#9
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Senior Member
Join Date: Apr 2015
Location: nm
Posts: 1,833
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Quote:
Originally Posted by Mroe67
When we were at the camp site I think we might have had points of time where the voltage dropped very low. I noticed during the night even loosing power twice. That may have triggered an issue with the device. I did double check the fans they were clean
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You can order a switch for that inverter plugs right in . I turn my inverter off when I'm gone or at night time .I use a surge protector .
__________________
2018 1 ton 4x4 c.c standard bed GMC Denali
Anderson ultimate hitch
2015 311 Impact Fusion toy hauler
2018 Milwaukee 8 FLRTU roadglide glide ultra
2018 800 Z force spot BUGGY.
500 watts of solar enough power for boon docking.
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05-18-2019, 10:45 AM
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#10
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Member
Join Date: Aug 2018
Location: Visalia
Posts: 88
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What size is the inverter? How many watts output is it? It may not be big enough for the usage.
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Linear Mode
