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rsqfyrmedic's avatar
rsqfyrmedic
Explorer
Jan 27, 2018

A/C and Fridge not working on shore power

Howdy all...hoping for some help. MH in question is a 1998 Damon Ultrasport 3670. Completely renovated with a new liquid roof, interior, laminate flooring, upholstery etc. Batteries all less than a year old. Replaced the power converter about 6 months ago. We just got back from a trip 3 weeks ago and everything worked peachy. I was going to prep for an upcoming trip and found all my batteries dead. Refrigerator and A/C don't work on shore power but the 110v outlets are. (Weird, no?) Everything works fine with generator power. (Once I charged the batteries.) The transfer switch is putting out 110v but I'm not getting any 110 voltage at the power converter. I didn't have time to pull out the converter but that's my next move...any suggestions?
  • enblethen's avatar
    enblethen
    Nomad
    Jan 27, 2018
    Bad transfer switch. Portion feeding from shore power.
    Locate make and model, then post. if it is a dual relay system see if the relay pulls in for shore power.
    Turn off power to rig. Check for continuity on the coils of transfer switch relays.
  • ksg5000's avatar
    ksg5000
    Explorer
    Jan 27, 2018
    You tried firing up the generator and see if that changes anything? Seems to me that bad converter or bad transfer switch would be things to investigate.
  • rsqfyrmedic's avatar
    rsqfyrmedic
    Explorer
    Jan 27, 2018
    I tested all the breakers and fuses...working fine on the genset but dead on shore power. There is power at the transfer switch so I don't think it's the twist lock plug. I'm thinking it might be the converter itself is dead but why would everything work on the generator?
  • enblethen's avatar
    enblethen
    Nomad
    Jan 27, 2018
    I would now start by:
    1) turn off all breakers in rig, applying light pressure toward off.
    2) Locate breaker for receptacle, turn it off applying light pressure toward off. Turn breaker on.
    3) turn on main breaker in rig, followed buy branch breakers.
    If this doesn't work, test the cable to the rig. Does it have a twist lock connector ate rig? If it does check for power there.
    Do you have an energy management system? What does it say?
  • ksg5000's avatar
    ksg5000
    Explorer
    Jan 27, 2018
    Test the output of the converter and also check the fuses on the converter.
  • rsqfyrmedic's avatar
    rsqfyrmedic
    Explorer
    Jan 27, 2018
    Breakers (in the house as well as the MH) good and I'm plugged directly into the 50 amp I've been using...no adapters, GFCI's are all good. On that last trip we did use a 30 amp adapter at the pedestal...there wasn't a 50 amp hookup. It was cold out so we never used the A/C's while there and I'm pretty sure the fridge was working on shore power. (Didn't switch to LP)
  • Sam_Spade's avatar
    Sam_Spade
    Explorer
    Jan 27, 2018
    And....if this is 50 amp service, you have TWO 110 v inputs.
    One side might be "bad" for some reason.
  • enblethen's avatar
    enblethen
    Nomad
    Jan 27, 2018
    No power to rig.
    Are you using an adapter? They are weak points.
    tripped breaker to receptacle supplying power.
    What are you plugged into? Could be GFCI receptacle which tripped.

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