TMC is an independent, primarily volunteer organization that relies on ad revenue to cover its operating costs. Please consider whitelisting TMC on your ad blocker and becoming a Supporting Member. For more info: Support TMC

Battery heater fuse

Discussion in 'Roadster: Technical' started by Msjulie, May 1, 2017.

  1. Msjulie

    Msjulie Member

    Joined:
    Jun 26, 2016
    Messages:
    207
    Location:
    San Fran Bay Area
    Anyone know where this is (if there is indeed one) on a 1.5 and is it remotely user serviceable?

    thanks
     
  2. jnordeng

    jnordeng Member

    Joined:
    May 13, 2014
    Messages:
    15
    Location:
    Norway
    If you are getting error #963, it's a 10A glass fuse inside the PEM on the 2.5.
     
  3. Msjulie

    Msjulie Member

    Joined:
    Jun 26, 2016
    Messages:
    207
    Location:
    San Fran Bay Area
    i have a 1.5 but thanks :)
     
  4. dhrivnak

    dhrivnak Active Member

    Joined:
    Jan 8, 2011
    Messages:
    2,461
    Location:
    NE Tennessee
    It looks like the battery heater is 110V and the power comes through the PEM. So no easy to access fuse it appears.

    upload_2017-5-2_22-0-19.png
     
    • Informative x 3
    • Like x 1
  5. David99

    David99 Active Member

    Joined:
    Jan 31, 2014
    Messages:
    2,568
    Location:
    Brea, Orange County
    Where is this document from? It sounds a little odd that it's running off 110 Volt. It would be the only thing that runs off external AC power. What is the PEM? Isn't that the inverter? If yes the PEM is powered by the battery so the heater would indirectly get it's power from the battery.
     
  6. dhrivnak

    dhrivnak Active Member

    Joined:
    Jan 8, 2011
    Messages:
    2,461
    Location:
    NE Tennessee
    The PEM controls both charging and running so yes it does the AC conversion. As to the source I was told it is the Roadster Technical Training Manual. I happened upon a bootleg copy a few years back. I have no idea if it is valid or official and as such I am very reluctant to post.
     
    • Informative x 1
  7. hcsharp

    hcsharp Active Member

    Joined:
    Jun 7, 2011
    Messages:
    2,734
    Location:
    Vermont
    While the Power Electronics Module is powered by the battery, it only controls the power going to the coolant heater. It doesn't supply it. In other words the heater is not indirectly powered by the battery and the heater power does not come through the inverter.

    It's likely that the fuses for the coolant heater are under the small access cover on the PEM. That's where they are on the 2.x and the 1.5 location is probably the same. It's important to replace those fuses with the right kind, not just the right amp/voltage rating. If they overheat they will melt the plastic fuse holder and you can forget getting the old fuses out.
     
    • Informative x 2

Share This Page