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Discussion Starter · #1 ·
Hi folks.
An old problem has returned; I set the charge limit to 80%, but the charging continues beyond 80%. I have to stop it manually. I don’t remember how and why the problem disappeared last time…😓

Anyone with similar experience?
 

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Ok, just asking as any schedule set up overrides % set on AC or DC setting. Worth asking.

Do you know if the car has all the latest SW updates?

Sounds like the car signal to stop charging is not being received at the charger. Is this home only or away?

Do the cable contacts and car contacts look clean?

Straw clutching....

Alan
 

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Discussion Starter · #5 ·
Ok, just asking as any schedule set up overrides % set on AC or DC setting. Worth asking.

Do you know if the car has all the latest SW updates?

Sounds like the car signal to stop charging is not being received at the charger. Is this home only or away?

Do the cable contacts and car contacts look clean?

Straw clutching....

Alan
Of course it’s worth asking. I appreciate it. 🙏
I got the latest updates last week and, now that you mention it, the problems returned after that.
I will check with my dealer.

I almost never charge outside home, so I don’t know if it will be the same if I do. The few times I have been charging at public chargers I’ve used the fast charger, and for that I have not set any limit.
 

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Sorry if this sounds like a very silly question... but have you definitely set the AC charge limit and not the DC one to 80%?
 

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Sorry, this just my opinion but if it does the beyond 80% thing at home it might be worth trying a public 7kw ac charger just to knock the home charger off the "possible" list before you go to the dealer. This is on the basis that what you mean by fast charger is the 50kw dc charger....just a thought

Alan
 

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Discussion Starter · #11 ·
Sorry, this just my opinion but if it does the beyond 80% thing at home it might be worth trying a public 7kw ac charger just to knock the home charger off the "possible" list before you go to the dealer. This is on the basis that what you mean by fast charger is the 50kw dc charger....just a thought

Alan
I'm thinking more and more about the car itself. The charger is after all in the car and not in the wall box. The setting for maximum 80% is set in the car.
It all reappeared after the last software update from Mazda.
I will have a talk with them on Monday.
 

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Discussion Starter · #12 ·
This evening I tested to see how far the charging would go, and in goes all the way to 100% even though I set the limit at 90%.
Not good.
 

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I was thinking more of taking the cable/home charger out the equation. In reality we know we have external charger and the car has the AC to DC convertor (on the ac charging system) to actually provide the juice to the batteries hence the restriction to 6.6kw max. If the car is sending the stop charging signal in the first place and if it does the same on two different cables, type 2 from your home charger and normal home socket charger to type 2 connector, that would take the signal pin fault on a cable/home charger out of the reckoning. Then it would most certainly be the car. It was just a thought to narrow it down for the dealer nothing more.

BMS does not send a tickle charge if % is reached so power should be off

Hope the dealer can solve it! Let us know how you get.

Alan
 

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Hi, i have the same problem (also the 12v battery blackout). The car is at the official workshop and now they are telling me that is normal the car always get 100% (wtf...?). I'm about to sue
 

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I think they speak with forked tongue! Both scheduled and normal charge have % settings. If they are being overridden that's a fault!

Alan
 

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Discussion Starter · #16 ·
I have talked to the Mazda dealer and also tested to charge in other places. The problem only appears at home, so it’s definitely the wall box.
Another interesting thing happened a couple of times the last week; the wall box suddenly decided to not give any power. I took the cable out a few times and on the fifth attempt it started up again. Extremely unreliable product. Customer support has developed an advanced skill in hiding.
 

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Figgeman, is it a tethered cable on this charger? If yes wd40 the car end of the cable to clean the contacts ensuring the power is off. Cotton buds help.

If no and you used the same cable to charge elsewhere clean the charger connectors ensuring you disconnect it from the power source in advance, again with wd40 and a cotton bud.

Worth trying to confirm it's the charger internals and s/w that's goosed!

Alan
 

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Discussion Starter · #20 ·
Figgeman, is it a tethered cable on this charger? If yes wd40 the car end of the cable to clean the contacts ensuring the power is off. Cotton buds help.

If no and you used the same cable to charge elsewhere clean the charger connectors ensuring you disconnect it from the power source in advance, again with wd40 and a cotton bud.

Worth trying to confirm it's the charger internals and s/w that's goosed!

Alan
Thank you, Alan. I will apply some wd-40 and see if there is any change in behavior. I have checked the connectors with a flashlight and I can't see how any dirt or other obstacles should have been able to get in there with the cable connector always protected and the lid on the car connector, but you're right; you never know.
 
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