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Re: Three flashing blue lights, 3 beeps. Charging problem

Thu Mar 16, 2017 9:19 am

Sorry, no pictures but hope this helps.

FalconFour is referring to the release button on top of the Jplug. Many of these plugs have a hole in this button that is used for locking. Some Jplugs do not have this hole, in which case this method will not work.

With the Jplug detached, He suggests that you put a lock or other item in that hole to keep the button from moving. Then look at the face of the plug. The latch is at the same point of the circle as the button. It is rectangular. Everything else in the plug is round. FalconFour's instruction is to bend that latch upwards slightly. It's possible that you can bend it with your fingers or else use a screwdriver.
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MikeinPA
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Re: Three flashing blue lights, 3 beeps. Charging problem

Thu Feb 11, 2021 4:56 pm

Same issue with an L2 Siemens Versicharge this evening. Swapped it out for the stock L1 charger, issue is gone, car is charging.

It is snowing here on and off the past few days and the car is outside while charging. Ice could easily have gotten into the handle and has caused the handle latch micro switch to malfunction or caused a distortion in the latch mechanism when disconnecting this morning.

I will first warm the Verischarge handle up and see if that resolves it, next disassemble.
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alozzy
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Re: Three flashing blue lights, 3 beeps. Charging problem

Thu Feb 11, 2021 7:49 pm

It might be the diode issue, as the stock EVSE will still work, but pretty much any other EVSE will not. To rule that out, confirm that the car charges at a known good L2 public EVSE.
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MikeinPA
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Re: Three flashing blue lights, 3 beeps. Charging problem

Fri Feb 12, 2021 5:58 am

Ok, good information. There are some free-to-use L2 chargers not too far away.
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MikeinPA
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Re: Three flashing blue lights, 3 beeps. Charging problem

Sat Feb 13, 2021 10:49 am

The fault is almost certainly in the Siemens Versicharge--not onboard the Leaf. I tried two other L2 chargers and both charged normally, then returned home and the Siemens is still giving the three flashing light and 3 beeps. Hopefully it is just something in the latch signal.
2013 Pearl White SV man 09/13 58k purchased new 12/13
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MikeinPA
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Re: Three flashing blue lights, 3 beeps. Charging problem

Sat May 01, 2021 10:20 am

Conclusion: the voltage divider in the proximity circuit in the handle is failed.

Process to get this conclusion: I took the versicharge handle apart for diagnosis. There are 2 #10 torx tamper resistant screws under the rubber cover, then pry open starting on the latch end--there are 6 latching tabs which popped without too much effort--have care with the gasket.

The mechanical operation of the latch and the microswitch were all normal. Microswitch appears to be switching normally using a continuity tester . There are some spade terminals which had light corrosion; cleaned those. Put it back together, still "three flashing blue lights, 3 beeps"
Verified I could hear the microswitch clicking on and off inside the handle while the trigger is being operated. Cleaned some bug bits out the L2. Still "three flashing blue lights, 3 beeps".

Working on the assumption that the proximity circuit has failed, I borrowed one of those J1772 extension cables, connected the versicharge handle to it, plugged into the car, and charging commenced normally. The proximity circuit starts and ends in the handle (more or less, please don't mind my moderate understanding of electronics terminology), so the j1772 extension cable was reasonable diagnostic.

The voltage divider in the versicharge handle is molded into an off white plastic component about 1.5" long, 0.75" wide, and 0.5" thick. I feel confident that a) I wont find that part online, and b) some resistors in some potting compound would work if it was worth my time to repair it.
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Nubo
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Re: Three flashing blue lights, 3 beeps. Charging problem

Sat May 01, 2021 10:00 pm

MikeinPA wrote:
Sat May 01, 2021 10:20 am
...

The voltage divider in the versicharge handle is molded into an off white plastic component about 1.5" long, 0.75" wide, and 0.5" thick. I feel confident that a) I wont find that part online, and b) some resistors in some potting compound would work if it was worth my time to repair it.
Looks fairly straightforward. https://en.wikipedia.org/wiki/SAE_J1772

Image
I noticed you're still working with polymers.

MikeinPA
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Re: Three flashing blue lights, 3 beeps. Charging problem

Sun May 02, 2021 1:03 pm

Nubo, agreed. This stuff should work as an encapsulant: https://www.mgchemicals.com/products/po ... o-1-epoxy/ but I would test the repair without potting first to make sure it was fixed. Edit, I should also extract and test the existing voltage divider to see if the correct resistances are present. The problem could still be inside the microswitch (weak contact inserting some resistance) or a dirty pin (ditto).

1/4 watt resistor should be plenty for R6 and R7? They are just pulling the voltage down on some logic pin over on the controller side?
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coulomb
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Re: Three flashing blue lights, 3 beeps. Charging problem

Sun May 02, 2021 6:06 pm

MikeinPA wrote:
Sun May 02, 2021 1:03 pm
1/4 watt resistor should be plenty for R6 and R7? They are just pulling the voltage down on some logic pin over on the controller side?
Yes. The 150 ohm resistor will see most of the power, and it will only ever see about 1.5V @ 10mA, or 15mW. Even in a fault situation with 5V directly across it, it would be P = E^2/R = 25/150 = 167mW. A 250mW (1/4 W) resistor should be able to handle that continuously even trapped inside the case. I would suggest possibly using larger types (if they fit) for mechanical ruggedness, though the potting will help there.

Sheesh. I had to edit about 10 UTF-8 characters out of this post.
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MikeinPA
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Re: Three flashing blue lights, 3 beeps. Charging problem

Mon May 03, 2021 4:52 am

1/2 watt it is then. If I do the repair, I will definitely get pics of the inside of the handle, before and after.
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