50 amp transfer relay

Discussion in 'Class A / Diesel Pushers' started by chaz58, Oct 11, 2011.

  1. chaz58

    chaz58 Junior Member

    I have a 08 Fleetwood Discovery. I plugged into 50 amp service in Charlotte Motor Speedway and nothing happened (no tv,microwave etc.). I'm assuming since the generator and the inverter works that I have a transfer relay that has went bad? Anyone with any experience with this issue? Where is the transfer box?

    Thanks in advance

  2. LEN

    LEN Senior Member

    Don't know much about the Fleetwood Discovery but on most of the motor homes the transfer switch is in the power cord bay. It is the first place the power cord goes. Should be a box about 8-10" by 8-10" by 2-3" and 3 power wires going to it, one from shore, gen, and out to the RV main power breaker box. IF you hook to shore power and nothing, slap it that may cause it to switch. WITH ALL POWER OFF by off I mean unplugged and gen off, you can take the cover off and see if it is fried. Sometimes they just stick for no good reason.

  3. vanole

    vanole Senior Member


    Besides the transfer switch which is a good place to start looking for your problem, does your coach have a EMS (energy management system)? A neighbor down the street 07 Dscovery has and EMS system as standard equipment. If you have the EMS did you see any codes?

  4. chaz58

    chaz58 Junior Member

    I have the ems system but have no code it just says off. Think I'll call Tom Johnson's and have a tech look at it, I hate doing that since labor is so expensive and I'm pretty handy with tools. Thanks for the reply


    As usual my coach isn't like everyone's can't find the transfer relay, I have a junction box where the shore power connects, any other advice would be greatly appreciated.
  5. vanole

    vanole Senior Member


    Not sure who Winnebago uses for their EMS but my Monaco product utilizes a Progressive Industries.

    With no juice going to it it should have no display.

    Why I brought it up is that if the EMS detects an issue or supposed issue it won't let power from the pole into the unit. So you may have had a power pole issue and the EMS did what its supposed to. Codes you could see on mine are:

    E0- Normal
    E1- Reverse Polarity
    E2- Open Ground
    E3- Line 1 High Voltage
    E4- Line 1 Low Voltage
    E5- Line 2 High Voltage
    E6- Line 2 Low Voltage
    E7- Line Frequency High
    E8- Line Frequency Low
    E9- data Link Down
    E10- Replace Surge

    Which TJ you go to Concord or Marion?

    Len and I both have Monaco products and ours sit in the power cord comparment mounted at least mine on the back wall of that compartment and their is a sticker on it indicating what it is. You might want to look in your coaches documentation and it might have a picture or a small pamphlet with a picture showing you what it looks like.

  6. chaz58

    chaz58 Junior Member

    Thanks for the replies. I had a technician from Tom Johnson's Concord check it out and he could'nt find anything wrong with the coach. I have since came home and plugged the coach up and everything works fine. I guess my ems was doing what it was suppose to do, evidently I had bad shore power at the track. Thanks for everyone's reply. By the way I'm out $105.00 to be told nothing was wrong, I guess that's the price you pay for a little piece of mind.
  7. H2H1

    H2H1 Senior Member

    $105.00 is better than having no major problems than would have cost you arm and a leg. $105 is high, but I would take it and be happy.
  8. Pancanbob

    Pancanbob Senior Member

    Hi, Chaz58
    You may want to think about getting a Surge Guards or Surge Protector.
    They plug in between your RV and the power source.... they also can tell you if the power coming in low or high, or reversed
    They have them for 30 and 50 Amp plugs
    Just Google "RV surge protector"
    Take care
  9. vanole

    vanole Senior Member


    You hit the nail on the head concerning the silver lining. EMS was doing its thing as advertised.

  10. Guest

    Guest Guest

    i agree ,, u can't always depend on what the pedistal has ,, most are miss wired anyways ,, i always ck and make sure before i plug in ,, unless it is a place i have stayed at before ,, and i "know all is ok" ,, at Pirate Land in Myrlte Beach ,, i have found out that they have booster pumps for the fresh water supply ,, and they kick them in on big weekends and high demand months ,, my gauge on my regulator at one time registered over 150 lbs pressure on the fresh water line ,, but i was also close to one of the booster pumps ,, but i can imagine what can happen if others are not aware of it ,, it is
    always is better to be safe and know ,, then not worry about it

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