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

Tesla Wall Connector Troubleshooting

Discussion in 'Model S: Battery & Charging' started by jl9184, Sep 21, 2019.

  1. jl9184

    jl9184 New Member

    Joined:
    Sep 21, 2019
    Messages:
    3
    Location:
    Brecksville, Ohio
    I just got my used 2018 Model S, and had the Wall Connector installed last week. It worked when it was installed, but the next day, after driving the car and plugging it back in, it stopped working. Every time I plug it in, the voltage goes up to the 240's, but the amp stays at 0-1, then a clicking sound from the Wall Connector occurs, then the voltage goes back down to 0, and then this cycle repeats until I unplug the Wall connector.

    The whole time, the Wall Connector is green signifying it is working well. I took the car to a friend's house who only has a NEMA 14-50 but it charged well. It also charged well on my home 120V outlet and on the supercharger.

    I called Tesla and they are sending me a new Wall Connector. However, I just wanted to get the opinion of people on this forum whether that will fix the issue...I hope it's not something to do with the electrical supply here in Ohio, which is not great.

    Thanks!
    Jonathan
     
  2. Manitoba Keith

    Joined:
    Jul 28, 2019
    Messages:
    482
    Location:
    Brandon, Manitoba
    Just a thought, do you have the correct DIP switch settings?
     
  3. jl9184

    jl9184 New Member

    Joined:
    Sep 21, 2019
    Messages:
    3
    Location:
    Brecksville, Ohio
    The electrician installed it but I just checked the settings. 1 is down, 2 is up, and the rotary switch is on 9, which should be correct.
     
  4. JPoldo

    JPoldo Member

    Joined:
    Aug 13, 2017
    Messages:
    301
    Location:
    Boston, MA
    Try turning circuit breaker off, then on, and try wall connector again. Suggest your electrician, not you because it's dangerous, temporarily connect a heavy load such as a portable space heater (~1200 watts) from each hot to common line while measuring voltage. This basic test might expose a problem with your electrical supply. You may have a loose connection either in WC or breaker panel that worked initially, then sparked creating carbon for more resistance, and significantly less current flow for charging failure. Your WC has circuitry to detect this problem and will safely shut-down. Let us know what was the cause.
     
  5. RedTes

    RedTes New Member

    Joined:
    Nov 9, 2019
    Messages:
    2
    Location:
    Beilen
    My wall connector keeps stopping every +/- 10 min, but at nights it seems to start and complete the job. Every morning it is full (80%). Any idear what could be the problem?
     
  6. user212_nr

    user212_nr Active Member

    Joined:
    Aug 26, 2019
    Messages:
    1,341
    Location:
    US
    Possibly you have an inconsistent/insufficient electrical supply. If the voltage drops, the HPWC will shutoff the power. At night, when you use less electricity in your house, possibly the drop is removed.

    You could probably fix the issue by lowering the number of amps you charge at, but you would want to figure out exactly what is your problem to be sure it is wired safely.

    So start with who installed it, what wire gauge, breaker, settings, and then how much power do you have to the house and how much do you actually use.

    HPWC problem | Tesla
     
  7. user212_nr

    user212_nr Active Member

    Joined:
    Aug 26, 2019
    Messages:
    1,341
    Location:
    US
    If they sent you a new wall connector, then you ought to be pretty sure that that was the issue (not a cheap device). Did they leave you the old one?
     
  8. kkillebrew

    kkillebrew Banned

    Joined:
    Jun 23, 2019
    Messages:
    401
    Location:
    austin, tx
    If the car states zero or very low amps but full voltage I would check the ground connection from the 240V line first. Is the LED green or red?
     
  9. Lasttoy

    Lasttoy Active Member

    Joined:
    Mar 24, 2017
    Messages:
    1,551
    Location:
    St Augustine, Fl
    Stop, u have wiring problem. R u sure electrician used 4 wire? Red, black, green, white. U might have one wire connector not REAL tight. My electrician expressed concern about torque. Several folks have had problems in the breaker box.
     
  10. Rocky_H

    Rocky_H Well-Known Member

    Joined:
    Feb 19, 2015
    Messages:
    5,598
    Location:
    Boise, ID
    There might possibly be a wiring problem, but not because of this incorrect reason. The wall connector is a 240V only device. It does not need the dual voltage of 120V and 240V, so it does not use 4 wires. The neutral is not used or necessary.
     
  11. Merle

    Merle Member

    Joined:
    Apr 5, 2019
    Messages:
    116
    Location:
    Tahoe
    Bad wiring?

    Drop the amperage to as low as it'll go (40A? Been a while since I looked at the options) and see if the problem goes away. You may have a bad ground/neutral.

    I've seen panel work where instead of getting new breakers to manage a two-phase setup, two bonded pairs was use in lieu and only one leg (each) tied to give a 240v potential. This was obviously done at the very bottom of the panel which can increase risks. Then you may have issues with a leaky ground/neutral as well.
     

Share This Page

  • About Us

    Formed in 2006, Tesla Motors Club (TMC) was the first independent online Tesla community. Today it remains the largest and most dynamic community of Tesla enthusiasts. Learn more.
  • Do you value your experience at TMC? Consider becoming a Supporting Member of Tesla Motors Club. As a thank you for your contribution, you'll get nearly no ads in the Community and Groups sections. Additional perks are available depending on the level of contribution. Please visit the Account Upgrades page for more details.


    SUPPORT TMC