[RE-wrenches] Overcurrent error SW4024

[Dan Fink]

Mac;
We accidentally solved our problem similar to yours the other day.
We were making some big PV racks, and had to move the welder to the
other side of the shop, with no 240v outlet. So we added a 240
extension cord to the welder. End of problem.
Yes, Mac's problem *could* be an age /  shorting/overcurrent problem
in the 240V autotransformer.....but that's no explanation for our
problem here. The welder is fine as frog hair here.
So, i would say try adding some resistance to the line to the
autotransformer, Mac. Our SW inverter "overcurrent" shutdown problem
has nothing to do with overcurrent....it's some sort of line condition
that tricks the SW into thinking there's a problem.
DAN FINK


On Thu, Mar 29, 2012 at 1:15 PM,  <dan at foxfire-energy.com> wrote:
> Boy, I'm haunted with the notion that we've seen this before.. years ago. I
> want to say it was a simple fix. might have been something to do with NiCad
> batteries. Maybe low battery voltage and high start currents. I just don't
> remember.. maybe I wasn't here then.
>
> db
>
>
> Dan Brown
> Foxfire Energy Corp.
> Renewable Energy Systems
> (802)-483-2564
> www.Foxfire-Energy.com
> NABCEP #092907-44
>
>
> -------- Original Message --------
> Subject: Re: [RE-wrenches] Overcurrent error SW4024
> From: Dan Fink <danbob88 at gmail.com>
> Date: Thu, March 29, 2012 3:04 pm
> To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
>
> Turning on other loads around the shop seems to work here. But we need
> to have over 100 watts on (we are using lights) to prevent the
> problem. It's a PITA, as it crashes the satellite internet, which
> takes 20-60 minutes to boot back up.
>
> DAN FINK
>
> On Thu, Mar 29, 2012 at 12:12 PM, <penobscotsolar at midmaine.com> wrote:
>> We've seen this type of problem twice with well pumps. Both times, the
>> problem was with a short in the load side close to the pump. One was
>> occasional, the other constant. Interestingly, running a large generator
>> seemed to "fix" the situation to the customer. In both cases, we found the
>> short, repaired it and both systems are still working well to this day.
>> One used a transformer, the other was a single 4024SW.
>>
>> Daryl
>>