My Truma Combi 4E is not working!

Discussion in 'Heating and Air-Conditioning' started by Biggles, Nov 28, 2014.

  1. Biggles

    Biggles Funster

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    I had my heating (240v) on in the van earlier in the week to air it a bit ready for the weekend.

    It has now stopped working (sort of). I have replaced the 10amp slow blow fuse which had blown.

    I have checked all the connections at the control end and all seems fine as are all the other vehicle fuses.

    The 12v + power lead was showing 2.9v. Then a while later it was showing 12.8v with me having done nothing, and when I tried the heater it worked again for about 15 minutes then stopped and now is showing 10.3 v on the power lead which of course is under the 10.5v it needs to run.

    All the batteries are fully charged.

    Has anyone got any ideas what is going on?
     
  2. Bertie Bassett

    Bertie Bassett Read Only Funster

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    Commiserations Biggles, I don't have a solution but I'm watching the thread with interest and I hope you get it fixed asap.(y)
     
  3. Biggles

    Biggles Funster

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    In a month the EM50 power module, the fridge, and now the Trauma heater. Will it ever end. My last MH I built my self. Used it for 3 years without a single problem.

    And we are going away on Sunday. At least I have the new power module for the Thetford fridge which I will fit tomorrow.
     
  4. Bertie Bassett

    Bertie Bassett Read Only Funster

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    Best of luck mate and I hope all is well by the time you're ready for your trip.
     
  5. Debs

    Debs Funster

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    A bit obvious but have you done a search on here?

    We have been struggling to get to grips with one of these but there is quite a few threads and info on here?
     
  6. Biggles

    Biggles Funster

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    Thanks. We have our love to keep us warm, and a kettle and flannel wash will have to do.
     
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  7. Biggles

    Biggles Funster

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    I did but no solution I could find.
     
  8. Debs

    Debs Funster

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    Yes - we had a similar experience at Abbey Wood:)

    Sorry to hear you couldn't get it sorted - I'm sure the good folk on here will be able to help, bit early yet though(y)

    Good luck:)
     
  9. gozomike

    gozomike Funster Life Member Life Member

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    That sounds like an intermittent faulty connection on the feed with the volts dropping when the truma tries to draw current. A check of all leads & connections would be worth while. Not sure on the blown fuse, but check the connections where it plugs in in case the fault is still there.
     
  10. g8ysn

    g8ysn Funster

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    check main fuse box take fuse,s out and re-place mine some times act,s up as stated probably fured up
     
  11. DP_JAY

    DP_JAY Funster Life Member

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    Sounds like a bad connection.
    Are you reading between the live feed & the earth input or a Known good earth?
    Take a FUSED feed straight from the battery & connect it to the 12v feed input.
    If that still gives a low reading it could be a bad earth.
     
  12. Judge Mental

    Judge Mental Funster Deceased RIP

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    I had trouble with this once. it was a loose connection in the 230v grey feed box next to unit...worked well for years until it worked itself loose. please make sure your not plugged into mains if you decide to have a look....:(
     
  13. Biggles

    Biggles Funster

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    Happy to report that the Truma is working. It wasn't the heater it was the connection out of the Sergent unit. The wire had become detached all but a couple of thin strands causing voltage drop on start. If the voltage on the heater drops below 10.5v it won't run.

    Thanks for all suggestions.
     
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  14. DP_JAY

    DP_JAY Funster Life Member

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    Well done, glad it's sorted.
     
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