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RVTech1225's avatar
RVTech1225
Explorer
Jun 29, 2015

(Tiffin) Upgrading Inverter from Xantrex RV3012GS to SW 3012

Hey guys and gals,

I'm upgrading an inverter and as it's an older coach it has the 5 Pin white plug for generator controls to the inverter, however the new inverter has a 20 pin white plug I need to wire into. The labels for each wire from the old inverter to the new one are a bit different. As I don't want to wire this up backwards, can anyone tell me which one goes to which?
Labels on old plug:
Gen Start 2 (yellow)
Gen stop 2 (yellow)
Thermostat + (green)
Gen start 1 (black)
Gen run (brown)
Gen stop (blue)

The new harness' diagram is labeled and colored different, any help is appreciated, thanks!
  • Chris_Bryant's avatar
    Chris_Bryant
    Explorer II
    Jun 30, 2015
    Some depends on the genset, but I would start with :

    Old gen start 2 and gen stop 2 (both yellow) to new #16 and #18 - note both should be ground, so it shouldn't matter which is which, and IIRC, I hook all of those together *and* to new #13, which is ground.

    Old Thermostat + to new #1 - Thermostat 1 input.

    Old Gen start 1 (black) to new #17 - gen start, normally open

    Old Gen Stop 1 (blue) to new #16 - gen stop, normally open.


    Old Gen run (brown) to new #12.

    If it's an Onan, Type 2 should be the ticket, maybe type 1.
  • RVTech1225's avatar
    RVTech1225
    Explorer
    Jun 30, 2015
    Is anyone out there good with any of this? I really need help. Customer is waiting to pick up.
  • RVTech1225's avatar
    RVTech1225
    Explorer
    Jun 29, 2015
    http://imgur.com/VmkY9Dy
    http://imgur.com/SdEnmiq
    http://imgur.com/D7jBSN7
    http://imgur.com/7QOl36T

    What I wrote in earlier post is what the old harness was labeled as

    http://imgur.com/PtyVxB2

    http://imgur.com/AwcswgA

    Better images of new harness diagram
  • RVTech1225's avatar
    RVTech1225
    Explorer
    Jun 29, 2015
    Let me see what I can do, so long as I can upload pictures from my phone we should be okay, give me a minute.
  • MEXICOWANDERER's avatar
    MEXICOWANDERER
    Explorer
    Jun 29, 2015
    You need to start a program here for this to work.

    Draw EACH diagram out one on the top of a page

    The other just beneath it.

    Then take an image and upload it to the site

    Would make all the difference in the world

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