Yellow light appears when I use the 240V outlet

[Naika4a90]

Hi, everyone!
My charger gets a yellow light when I use the 240V outlet.
I found the ground wire wasn't connected.
I had a dealer replace the faulty cable, but the new one also has the same issue.
I tested it with the 120V one and I had no issues.
What could be the cause?

 

[May_K]

It sounds like you might have a similar issue to mine. My OEM charger started showing problems and wouldn’t work properly on a 240V outlet, even after reporting it to the dealer. Since you mentioned the ground wire wasn’t connected, that could definitely be causing issues...and since your 120V charger works fine, it seems like the 240V setup might have a deeper issue, possibly with the wiring or the charger itself..

 

[Jon GrosJean]

Mine did this. I found that the plug in the end of the charger had come loose and was not making good contact. After pushing it in, it worked fine.

 

[Richard Kamens]

Mine did this. I found that the plug in the end of the charger had come loose and was not making good contact. After pushing it in, it worked fine.

I found the same thing, when I "replugged" the 240v adapter the amber light went away and was replaced by a Blue light.

 

[TanGent]

A tripped GFCI can also prevent the charger from functioning properly. Check for any tripped GFCIs in your home's electrical panel.

 

[Jon GrosJean]

I had a similar thing happen when I turned off the 120V outlets in my garage. For some unknown reason, the 220V charger went to yellow. When I turned it off and then back on via the circuit breaker panel, it was happy. I guess you could unplug and plug it back in and it should be the same.

 

[Mike Sweeney]

Most reputable chargers sense ground leakage and missing grounds. They also measure resistance. Its a good safety feature . Having to reset a breaker is a warning that there is an internal issue as far as the charger is concerned. Burnt contacts or dirty contacts lead to higher than expected resistance which stops the charger from working. The reset can “clean”
The contact and it may for work for a long time or it may not. New quality breakers are cheap compared to house burning down. I had a cheaper breaker that my first electrician put in until I fired him. The 2nd high breaker has been perfectly fine for the past 5 years. Which leads to this comment. While you can use a dryer or such circuit, personally speaking, I see that as a short term use. They are not installed with the high continuous use that an EV throws against it. The dryer runs an hour. Maybe two at a time and at half of the rated breaker. The EV can charge for HOURS at near capacity of the circuit so any flaw will be magnified. A common issue even on the “Ev” circuits is the wire to connector is supported to be torqued to a spec. Normally around 50inch lbs. which is more than you think and definitely more than what most feel is “tight”. A loose connection can provide high resistance which causes heat which causes it to loose more and more resistance until it melts down. There are all kinds of pictures out showing this result.