[RE-wrenches] Overcurrent error SW4024

[Dan Fink]

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
>
>
>
>> Hi Mac;
>>
>> We are having a similar problem at our metal shop with two stacked
>> SW4024s. They are stacked so that inverter #2 idles until something
>> 240V is turned on -- well pump and welder are the only 240 VAC loads.
>> We are getting an overcurrent error and shutdown by just turning the
>> welder's power switch on -- NOT when starting to weld.
>>
>> Any help from the list appreciated!
>>
>> --
>> Dan Fink,
>> Executive Director;
>> Otherpower
>> Buckville Energy Consulting
>> Buckville Publications LLC
>> NABCEP / IREC accredited Continuing Education Providers
>> 970.672.4342 (voicemail)
>>
>> On Thu, Mar 29, 2012 at 8:25 AM, mac Lewis <maclewis1 at gmail.com> wrote:
>>> Hello wrenches,
>>>
>>> I have a customer that I have been working with over the phone.  He has
>>> a SW
>>> 4024, with a T240 transformer feeding a 2 HP well pump on a timer.   The
>>> system has worked well for years, but recently, he has been getting
>>> overcurrent errors when the well pump starts.  It's not every time, but
>>> about every other time.  He also did an experiment where he turned off
>>> the
>>> well pump, and gets the overcurrent error just energizing the
>>> transformer.
>>>  Does this indicate the transformer is failing?  What are other
>>> explanations
>>> for this behavior?
>>>
>>> Thanks for any advice