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Dead UMC after storm

Discussion in 'Model S: Battery & Charging' started by wk057, Jul 28, 2014.

  1. wk057

    wk057 Senior Tinkerer

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    Hickory, NC, USA
    So, had the UMC outside last night plugged into an enclosed outlet.

    The UMC itself was elevated hanging from the outlet about a foot off the ground.

    Good sized storm came through, car continued charging. The UMC is a NEMA 4 enclosure, so, wasn't concerned about the rain (have used it in the rain before).

    Well, this morning charge ring was red, dash complained of no power to the charger.

    UMC had no lights on it. Breaker was good and tested the outlet and it had power.

    Shook the UMC around in my hand and I could hear water inside it. :(

    The water was dripping out from behind the sticker on the back. The sticker had one edge up a little, so, I peeled it back. Turns out the reset button sits on top of a cutout in the plastic, which is obviously where the water got in. I'm not sure covering this with a sticker qualifies as NEMA 4 (water tight/weather proof). Seems like a bit of a design flaw...

    Anyway, I shook the bulk of the water out and have it sitting in front of an A/C vent for now with the sticker peeled back. Hopefully it comes back to life. If it doesn't I'll try to get Tesla service to replace it since it's supposed to be weatherproof and I presume is under warranty (only had the car and UMC for 5 months).

    2014-07-28 19.53.13.jpg

    Anyone ever had a similar problem? :(
     
  2. TonyWilliams

    TonyWilliams Active Member

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    Location:
    San Diego - Tesla powered Rav4 EV

    The Roadster UMC has a hole that goes directly into the top of the relay... yup, water can go straight in.
     
  3. widodh

    widodh Model S R231 EU

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    I'd suggest you look into a HPWC. That's better for using outdoors in such weather conditions. Leave the UMC in the car in case you need it.

    Even if you have a single charger a HPWC is a safer solution then using the UMC daily and in such weather conditions.
     
  4. ChrisPDX

    ChrisPDX Member

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    I would not even bother trying to use it again (assuming it even starts working again). The internal contacts are now most likely dirty which only increases resistance and therefore heat generated. Since it's under warranty, just take it to a service center and have them replace it. Job done!
     
  5. wk057

    wk057 Senior Tinkerer

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    I actually have the HPWC at home on a 100A circuit. I was using the UMC away from home.

    Still dead after drying. Contacted Tesla service about the issue, waiting for response.

    My only issue with taking it to the service center is that they are about 70 minutes away, each way, and I never have a reason to go in that direction otherwise. I'm hoping they can do a swap of it via mail or something. I'd let them put a hold on a card or something while they send me a new one if they'd go for it. Would save me 2+ hours of driving.
     
  6. widodh

    widodh Model S R231 EU

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    Great, never mind my response then :)

    I wouldn't try to use this UMC again. Swap it for a new one.
     
  7. Alysashley79

    Alysashley79 Member

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    I've had four UMC's all for different reasons. As long as your car is under warranty they'll replace it. I'd commend just calling your closest service center and explaining to them what happened and explain to them that you're away from home and ask them to valet you a new UMC.
     
  8. mgboyes

    mgboyes Member

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    The UMC body is supposed to be IP44 rated I believe (pretty sure that's stamped on it; I haven't been out to the car to check). A sticker covering a hole in the body doesn't sound very IP44 to me. I would definitely ask for them to replace it.
     
  9. wk057

    wk057 Senior Tinkerer

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    Verdict: Warranty replacement UMC is on its way from Tesla service via Fedex. :)
     
  10. Seven7

    Seven7 Member

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    That's how it went for me, no water in my UMC, it just quit and Tesla fed-ex'd a new one. I had a new UMC within 24 hours of the call to Tesla.
     

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