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Old 06-06-2024, 08:07 PM   #1
kjohnson
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Inverter protected circuit not operating

Hello Folks,

I'm having an issue where none of our inverter protected circuits (including the firdge) are not working. I've verified at the inverter that it's receiving power and putting out power, but when I check at all the circuits there's no power. We recently had our schwintek slide repaired where they basically replaced the entire slide assembly, motors and all (story for another day). I'm guessing during the slide repair they somehow damaged the cable? We have a CSW 2012 inverter, which has the built in transfer switch, so nothing should be wrong there. It doesn't appear there are any GFCI protected outlets to reset. Scratching my head for ideas as we're camping for the next two weeks and have no fridge at the moment.

Also, does anyone know if that circuit is isolated? Thinking I can completely disconnect that inverter and then back feed one of the circuits to power up the fridge and 6 outlets.
 
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Old 06-06-2024, 09:19 PM   #2
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Keith,

Recommend you take all power off your rig including disconnecting your batteries. Then reconnect power and batteries and try again. Transfer switch is the likely culprit.
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Old 06-06-2024, 10:25 PM   #3
kjohnson
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Is there an external disconnect or are you thinking the one internal to the inverter? As best as I can tell transfer switch is built into the inverter.
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Old 06-07-2024, 11:52 AM   #4
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Keith,

I am simply suggesting to totally power down your rig including battery power and trying it again. Cycling electric power will occasionally cure electrical issues.
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Old 06-07-2024, 01:41 PM   #5
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Do you have the user manual? Page 20 and 21 gives some operating and troubleshooting info. Could be too much load.

https://www.magnum-dimensions.com/si...ies%29_Web.pdf
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Old 06-07-2024, 04:22 PM   #6
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Where is Foldbak (the guru of CSW inverters) when you need him? I think in Yellowstone where the beauty of the park and the lack of Wi-Fi keeps him from the MOC.
Quote:
Originally Posted by kjohnson View Post
...We have a CSW 2012 inverter, which has the built in transfer switch, so nothing should be wrong there. It doesn't appear there are any GFCI protected outlets to reset....
Looking at the Magnum website, I see the CSW 2012 Inverter has a GFCI outlet on its face. There is no mention of a Transfer Switch.
https://www.magnum-dimensions.com/pr...ter-csw-series

The owners manual is located here:https://www.magnum-dimensions.com/si...V%20Series.pdf

I remember reading previous Threads about this inverter and one's need to reset the GFCI and/or turn on the inverter after a power disconnect.

Have you measured the output voltage at the 120V plug on the inverter?

Quote:
...Also, does anyone know if that circuit is isolated? Thinking I can completely disconnect that inverter and then back feed one of the circuits to power up the fridge and 6 outlets.
I am hindered by not having a Montana with this inverter and inverted circuits. Therefore I have no idea how it is actually wired (the lack of Montana schematics is a crime). I would suggest you figure out how the inverter and the 120V electrical system coexist before you try to back feed power. A safer, albeit temporary, solution is to run an extensions cord from a working 120V outlet to the refer plug.
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Old 06-07-2024, 04:25 PM   #7
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In my 2022 there is a GFCI outlet on the inverter circuit. Mine is in the bedroom, but I have read posts where others are in the basement. If you own or can get your hands on a circuit toner you should be able to run the lines and see if there is an issue with the cable between the inverter and the sockets.
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Old 06-07-2024, 05:05 PM   #8
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While doing more reading about the CSW 2012 Inverter, I came across this installation picture. This helps a lot assuming Montana, in all its wisdom, actually installed the inverter and components as pictured.
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This identifies several places to check for 120V voltage. I remember there was a series of independent transfer switches which had a problem with transferring. I would use a VOM at every point along the circuits to see where the fault lies.
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Old 06-07-2024, 05:32 PM   #9
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Iím not sure if your inverter has an internal transfer switch. We have the CSW 2012 and this transfer switch is plugged into it. Itís mounted on the pass through ceiling.
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Old 06-07-2024, 06:01 PM   #10
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Transfer switch has no connection with the inverted outlets. If the inverter has AC output at the inverter but nothing at the outlets. It's a GFI or inverter breaker issue. See the attachments.
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Old 06-08-2024, 07:16 AM   #11
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Thanks folks!

After doing some digging I came to find out thereís an inverter protected GFCI in the basement. Why thereís an inverter protected circuit in the basement Iím not sure. Reset that bad boy and everything started working again. My wife had installed a USB/multi-plug adapter over it, so you couldnít even see the outlet.
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Old 06-08-2024, 07:16 AM   #12
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Downloading some of these files and saving them.
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Old 06-09-2024, 02:54 AM   #13
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GFCI circuits are usually installed in wet areas such as a garage or bathroom or around a kitchen sink/countertop. The basement is the closest thing to a garage in these rigs and could have a potential to get wet, so they put one in there for that reason.
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Old 06-09-2024, 08:31 AM   #14
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Although it is possible for the garage to get some water in it, more likely someone would be plugging in an extension cord there and connecting to a power tool, electric griddle, or some other device being used outside where someone would be standing on the ground using it. Hence the need for a GFCI outlet.
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Old 06-13-2024, 10:51 AM   #15
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Wherever you have a slide out, there will be change from the romex wire to a flexible cable (S.O. cable). The junction of the 2 electrical cable types is a 2 part plug. They would have had to disconnect that plug in order to remove the slide out. Iíd concentrate on finding and checking that connection. Find the round black cable (about 1/2Ē diameter) under the slideout in question. Follow it to the backside of the I-beam frame. Youíll likely have to open up the coroplast liner to find the connecting point of romex to S.O. cable. A proximity voltage detector will further help you to diagnose the problem area before deciding to open the coroplast. If there is no voltage present in the S.O.cable, youíll know that the lost 120 volts is between the breaker and the transition plug joining the romex and S.O. cable.
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