Issue with AC charging/New CCU fitted (Phase One SE LR)

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Got the car back from the dealership this afternoon, after it having the new replacement CCU fitted. Put it on charge with the Zappi from a starting point of 81%.

Success! Charged normally after almost 5 months of back and forth at the dealer and using rapid DC chargers. At last I can charge at home again, using solar and or cheap rate electricity. 😊

On my next charge I’ll test it to 80% to make sure it stops. As I don’t have a big commute that probably won’t be until next weekend. I’ll let you guys know if it behaves itself. Just glad to be able to charge at home once more.
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Birdy said:
Think that answers the question....set app to 80% but it kept going
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🤔 That’s both you and @tsedge that that’s happened to after the replacement CCU has been fitted. Hopefully it’s just a software update that’s needed. 🤞 I really don’t want to have to go to the garage again so soon. I wish MG could do an over the air update for something like this.
 
FiferMG4 said:
🤔 That’s both you and @tsedge that that’s happened to after the replacement CCU has been fitted. Hopefully it’s just a software update that’s needed. 🤞 I really don’t want to have to go to the garage again so soon. I wish MG could do an over the air update for something like this.
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And me.
 
FiferMG4 said:
Okay, that doesn’t bode well for me charging to 80%. If it doesn’t, I’ll inform the dealer of the issue, because it’s not good for our car’s battery balancing and hence life.
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That's true, although with all this DC charging to high levels I am tempted to keep going to 100% and see what effect it has. We won't be keeping the car for that long and the range is more than we need (SR range would do).

Might be worth the experiment to see if we are all babying our batteries for no reason like a cargo cult, or whether the range nosedives quickly and praying to the battery gods pays off.
 
I've been pointed in this direction from an MG4 group on Facebook. MY22 trophy collected in November 2022.

AC charging failed in November, car has been with dealer since. MG insisted on all software updates and then swapping hardware from donor car. Dealer claimed car would charge if heater was switched on so heater was swapped which didn't resolve it.

Had new CCU fitted this week, got it home Friday. Set schedule charge in car from 00.30 to 04.30, plugged it in, car started charging immediately. Tried a few times to reset (locked car, left it a while) but every time it ignores the schedule and starts charging immediately.

Tried scheduling the charge in the app, same issue. Am charging on a granny cable at present so no option for chargepoint to control start time. Fed up now!
 
katep23 said:
I've been pointed in this direction from an MG4 group on Facebook. MY22 trophy collected in November 2022.

AC charging failed in November, car has been with dealer since. MG insisted on all software updates and then swapping hardware from donor car. Dealer claimed car would charge if heater was switched on so heater was swapped which didn't resolve it.

Had new CCU fitted this week, got it home Friday. Set schedule charge in car from 00.30 to 04.30, plugged it in, car started charging immediately. Tried a few times to reset (locked car, left it a while) but every time it ignores the schedule and starts charging immediately.

Tried scheduling the charge in the app, same issue. Am charging on a granny cable at present so no option for chargepoint to control start time. Fed up now!
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Sorry to hear this - it does sound as if the car scheduling / limiting isn't working.

I use a schedule on my Zappi so I wouldn't notice whether or not the car scheduling worked.

This must be a bug, just hoping that there's soon a fix.
 
Oh and others have mentioned the heater thing too - with no improvement. Clearly MG think (or thought) it could be related.

Sounds like your dealer was trying to do their best.

One possible solution might be a timer plug for the granny charger - but it MUST be a timer plug rated for a high continuous current capability (ideally 13-15A).
 
Have you any timers set either in the car, on the app or your charger? The 5 second charge could be the car just doing a handshake with the charger and then waiting for the charging time to start.
 
Is yours a Phase 1 or a Phase 2 model? (i.e. does it have a rear wiper)?

If it's a Phase 1 (no rear wiper) then it might be the CCU issue. (See the Zappi thread).
 
Ian Key said:
Have you any timers set either in the car, on the app or your charger? The 5 second charge could be the car just doing a handshake with the charger and then waiting for the charging time to start.
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Yeah good shout. Mine is working fine and does what you said (locks charger in & handshakes, then sleeps until scheduled timeslot).

Agree it's likely to be either the home charger with a timer set or the car and they're conflicting.
 
lsb777 said:
Yeah good shout. Mine is working fine and does what you said (locks charger in & handshakes, then sleeps until scheduled timeslot).

Agree it's likely to be either the home charger with a timer set or the car and they're conflicting.
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I had the same problem in my case it turned out to be a faulty cable.Plugged in my spare cable bobs your uncle not had a problem since😀
 
Talky Toaster said:
Had the service done today, mentioned the problems with scheduling and charge limit ignored and they have installed a couple of patches related to those two issues. They say it's now working as it should. I haven't had the opportunity to try it yet though.
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That sounds good, let us know how you get on.
 

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