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Old 03-26-2022, 05:41 PM   #1
Foldbak
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Join Date: Jan 2022
Location: Shingle Springs
Posts: 2,232
M.O.C. #30417
Anyone have a Magnum CSW2012 inverter in their rig?

I am at a loss. I just spent all day replacing my inverter, remote switch and cable on my 2022 3 month old 295rl only to have the same problem. Montana sent me a replacement that I install because I don't have time to wait for the dealer to do since we're boondocking next weekend.



  • Can enter programing but can save changes or exit programing. It just stays in program mode
  • Inverter works and supplies AC and goes into bypass mode when shore or gen is present
  • When shore/gen power drops the inverter stays in bypass
  • The power button doesn't work
  • I have to exit the trailer and cycle the inverter battery switch for it to start inverting
I can't be the only one having this problem! Someone else must be experiencing the same problem. The Dimensions Magnum is a piece of crap and I can't believe that Keystone would spec this garbage in their top of the line product.
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Tony & Donna
2022 Montana HC, 295RL, Solar Flex 400, Onan 3600 LPG, 2K inverter, 200AH Lithium. 2020 GMC Denali 2500 6.6 Duramax, Demco 21K Auto Slide
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