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Onboard charger capacitors failed

Posted: Sun Feb 24, 2019 9:15 am
by sujeeva
ZEO 2012. Car on and go to driving mode. But cannot charge using AC charger or DC charger.
DTCs P3173, B2631 Sunload sensor, B2840 On board charger
Cleared errors. plugged AC charger. The car recognized the charger and started to charge. But fail after 5 seconds from the time when the AC charger plugged in.
Scan the car to get B2840 962E and P317 00C0. I did that several times, but it got the same result.
Some times, P3173 cannot clear. Several times, sometimes it gets cleared.

Tried DC Fast Charger. It went all charging sequences. But the charger did not got current request messages to inject current. So, the fast DC charger stopped working.
After that, the car showed errors B2840 962E , P317 00C0 and B29C1 9428. Tried several times, but failed.

Then disconnect the onboard charger of the vehicle and opened covers. Noticed that there are two burnt capacitors. No other burning signs.
Repairing of the onboard charger has not been guided b manufacturer, but decided to replace the burnt capacitors since the cost of even a used onboard charger is costly.
1. Has any done this before?
2. What could have caused this?
3. Will the replacement of Capacitors be successful?

Re: Onboard charger capacitors failed

Posted: Sun Feb 24, 2019 9:32 am
by Oilpan4
I would start with the capacitors.
I'm assuming they are polarized electrolytics.
Got any numbers for the voltage and microfarads?

Re: Onboard charger capacitors failed

Posted: Mon Feb 25, 2019 7:33 pm
by sujeeva
Oilpan4 wrote:I would start with the capacitors.
I'm assuming they are polarized electrolytics.
Got any numbers for the voltage and microfarads?
Thanks!
They are non Polarize capacitors. One is 1.0uF 275V LE105 and other is 3.3uF 275V LE335
My order will arrive on Friday, any further opinion?

Re: Onboard charger capacitors failed

Posted: Tue Feb 26, 2019 8:38 am
by Oilpan4
Hopefully that does it.

Re: Onboard charger capacitors failed

Posted: Wed Aug 14, 2019 6:49 am
by Relaxe
Any update? I'm really interested to know if it worked!

Re: Onboard charger capacitors failed

Posted: Fri Aug 30, 2019 4:22 pm
by RustyCOQ
I am also interested in your solution! I opened up my charger and found one very badly burnt.. capacitor? it is so burnt that I can't even tell what it is. I am interested to see if you have pictures? I am trying to find out the part number of the component so that I can order one to replace it.

Charger Model is
296A0 3NA5A

Component that is burnt is the large block component next to the filter inductor on the bottom board.

Re: Onboard charger capacitors failed

Posted: Fri Aug 30, 2019 8:49 pm
by goldbrick
Just FYI, there are lots of types of capacitors and I wouldn't be surprised if this is one that is not readily available 'off the shelf'. You might want to try to source a new PCBA from someone parting out a Leaf of the same year as yours. While a capacitor may seem like a simple device they are not, especially for high voltage and/or high power applications.

Re: Onboard charger capacitors failed

Posted: Sun Sep 15, 2019 6:28 pm
by nlspace
Here is a datasheet for the AC input filter safety capacitors that the OP mentioned.

Image

@Rusty, we need to see a picture to know which ones you are referring, there are several inductors in the OBC.