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Re: Mods for the Blink EVSE ! (was Fix)

Posted: Fri Oct 13, 2017 11:33 am
by gonefishin
After 3 months I am declaring the splice replacements a proper longterm fix to the self-test faults. See my previous posts for details but I think the whole issue with these self-test failures lies in bad splices and it's a 5 min and likely $0 fix for anyone. I would try that before I would proceed with lobotomizing the blink charger because I tried that and it didn't solve the problem. It's possible other people have other issues discussed in the repair kit, but it seems most likely that the splices are the failure point because they are mechanical and were done improperly to begin with.

Try removing the splice and test the system - does it look like your failure? Now try replacing the splice with a wire nut or soldering. If it doesn't work please post your results but I think this should be the next step for anyone.

Re: Mods for the Blink EVSE ! (was Fix)

Posted: Sat Oct 14, 2017 11:24 am
by tedhtl
davewill wrote:
tedhtl wrote:Hi All,

I have a lobotomized Blink charger. Did we ever put together a github repository or create any replacement software to control this charger? That would be a fun project. I’m a computer engineer.


User "whoami" started to do so in a project he called "Wink". He even posted a video of his efforts back on page 2, but vanished without ever sharing any of his code.

viewtopic.php?f=43&t=3279&p=81975#p81975

http://www.youtube.com/watch?v=FJ1_1TpDWsg


Yes, I sent that person a message. Also, didn’t DarkDave create a repository?

viewtopic.php?f=43&t=3279&p=80613#p80613

Re: Mods for the Blink EVSE ! (was Fix)

Posted: Mon Sep 10, 2018 3:12 pm
by hcirlub
Thanks for this thread. My EVSE would just go black screen after about 15 minutes of charging and be completely unresponsive until reset. Making it "dumb" made it functional again. Nice to see there is some support still out there for these.

Re: Mods for the Blink EVSE ! (was Fix)

Posted: Tue Sep 11, 2018 3:09 pm
by cracovian
Lots of original commercial pedestal L2 units are getting decommissioned these days... Does anyone know if they can be turned into dumb units after disconnecting blue cables from the Linux computer? Is that an option like on the residential units or can anything else be done with them?

Re: Mods for the Blink EVSE ! (was Fix)

Posted: Tue Sep 11, 2018 3:59 pm
by webfootguy
The guts of the pedestal unit is identical to the residential units. There is a different image on the SD card for commercial units though. You can replace it with a SD image from the residential unit and remove the need for an RFID card (depending on how it was setup).

Re: Mods for the Blink EVSE ! (was Fix)

Posted: Wed Sep 19, 2018 3:16 pm
by gonefishin
It's been another year since my last fix (re-soldering the CT splice) so I thought I'd give an update. My fix worked for a long while, then it had a lot of problems. I tried replacing my CT with a new one from OpenEVSE but that actually failed horribly. Even though their CT seems to be the exact same model & specs as the original, something is different with the current - perhaps the actual wires matter. So I ended up redoing the splices with the original CT and being extra careful to preserve as many strands of the wires as possible in the soldering job and it's now held up for several months. It's a real pain to keep having to do this every 6 months but at least it's still kicking. I'm quite sure it has something to do with the splices because when it was failing often, I could fix it every time by just grabbing the splices and fiddling with them for a second (I left the cover off... which isn't super safe but noone was randomly sticking fingers into it).

Re: Mods for the Blink EVSE ! (was Fix)

Posted: Mon Jun 03, 2019 6:54 am
by Valdemar
The contactor on my Blink has trouble closing lately, rattling loudly, making contact finally but sometimes not. I want to try to replace it but unsure what coil voltage I should get as there is no letter that designates the coil on the part.

Per Eaton catalog some of the coil types:
C25DNF240A - 110-120V ac
C25DNF240B - 208-240V ac
C25DNF240T - 24V ac
C25DNF2401T - 24V DC

I suspect it is the "B" 208-240V coil as there is no neutral coming in and use of lower voltages or DC seems unlikely, anyone can confirm?

Image

Re: Mods for the Blink EVSE ! (was Fix)

Posted: Mon Jun 03, 2019 12:53 pm
by LeftieBiker
Can you test the voltage at the coil connections? I agree that it is probably the 208-240 volt unit.

Re: Mods for the Blink EVSE ! (was Fix)

Posted: Mon Jun 03, 2019 3:40 pm
by Valdemar
LeftieBiker wrote:Can you test the voltage at the coil connections? I agree that it is probably the 208-240 volt unit.


Sounds like I'll have to if no one here knows but I hoped to avoid opening the unit one more time just for that :) I didn't realize it when I opened the unit to take the above picture assuming all I needed was the big part number, but looking at online pictures there should be a label next to the coil terminals with the voltage printed, so that's another option if I can see it without removing the whole thing.

Any opinions if changing the contactor is likely to help? My hunch it has something to do with not enough current from the control circuit to get positive hold, as contactors are pretty dumb devices, they either work or not, and the problem here is intermittent.

Re: Mods for the Blink EVSE ! (was Fix)

Posted: Mon Jun 03, 2019 11:33 pm
by Valdemar
I confirmed it's a 208-240V coil. The coil is energized through an Omron relay, I would wager $1 that relay is the culprit, not the main contactor.

I took off the side contactor and blew compressed air through the small opening, a piece of junk came out, who knows it could have been it. Started charge like 10 times, everything worked this time. We'll see.