<html><body><span style="font-family:Verdana; color:#000000; font-size:10pt;"><div>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.</div><div><br></div><div>db<br></div><div><br></div><div><br>Dan Brown<br>Foxfire Energy Corp.<br>Renewable Energy Systems<br>(802)-483-2564<br><a href="http://www.Foxfire-Energy.com">www.Foxfire-Energy.com</a><br>NABCEP #092907-44</div><div><br><br></div>
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-------- Original Message --------<br>
Subject: Re: [RE-wrenches] Overcurrent error SW4024<br>
From: Dan Fink <<a href="mailto:danbob88@gmail.com">danbob88@gmail.com</a>><br>
Date: Thu, March 29, 2012 3:04 pm<br>
To: RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>><br>
<br>
Turning on other loads around the shop seems to work here. But we need<br>
to have over 100 watts on (we are using lights) to prevent the<br>
problem. It's a PITA, as it crashes the satellite internet, which<br>
takes 20-60 minutes to boot back up.<br>
<br>
DAN FINK<br>
<br>
On Thu, Mar 29, 2012 at 12:12 PM, <<a href="mailto:penobscotsolar@midmaine.com">penobscotsolar@midmaine.com</a>> wrote:<br>
> We've seen this type of problem twice with well pumps. Both times, the<br>
> problem was with a short in the load side close to the pump. One was<br>
> occasional, the other constant. Interestingly, running a large generator<br>
> seemed to "fix" the situation to the customer. In both cases, we found the<br>
> short, repaired it and both systems are still working well to this day.<br>
> One used a transformer, the other was a single 4024SW.<br>
><br>
> Daryl<br>
><br>
><br>
><br>
>> Hi Mac;<br>
>><br>
>> We are having a similar problem at our metal shop with two stacked<br>
>> SW4024s. They are stacked so that inverter #2 idles until something<br>
>> 240V is turned on -- well pump and welder are the only 240 VAC loads.<br>
>> We are getting an overcurrent error and shutdown by just turning the<br>
>> welder's power switch on -- NOT when starting to weld.<br>
>><br>
>> Any help from the list appreciated!<br>
>><br>
>> --<br>
>> Dan Fink,<br>
>> Executive Director;<br>
>> Otherpower<br>
>> Buckville Energy Consulting<br>
>> Buckville Publications LLC<br>
>> NABCEP / IREC accredited Continuing Education Providers<br>
>> 970.672.4342 (voicemail)<br>
>><br>
>> On Thu, Mar 29, 2012 at 8:25 AM, mac Lewis <<a href="mailto:maclewis1@gmail.com">maclewis1@gmail.com</a>> wrote:<br>
>>> Hello wrenches,<br>
>>><br>
>>> I have a customer that I have been working with over the phone. He has<br>
>>> a SW<br>
>>> 4024, with a T240 transformer feeding a 2 HP well pump on a timer. The<br>
>>> system has worked well for years, but recently, he has been getting<br>
>>> overcurrent errors when the well pump starts. It's not every time, but<br>
>>> about every other time. He also did an experiment where he turned off<br>
>>> the<br>
>>> well pump, and gets the overcurrent error just energizing the<br>
>>> transformer.<br>
>>> Does this indicate the transformer is failing? What are other<br>
>>> explanations<br>
>>> for this behavior?<br>
>>><br>
>>> Thanks for any advice<br>
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