I'm hoping that it WILL be embarrassingly simple! I'm glad this wasn't
something I installed since you all know what it's like to find errors
is someone else's work. ;-)
Matt
d...@foxfire-energy.com wrote:
Boy, This reminds me of a problem I had a few years ago -- don't
remember the particulars, except that it was embarrassingly simple --
like a missing connection or something. db
Dan Brown
President
Foxfire Energy Corp.
Renewable Energy Systems
(802)-483-2564
www.Foxfire-Energy.com <http://www.Foxfire-Energy.com>
NABCEP #092907-44
-------- Original Message --------
Subject: Re: [RE-wrenches] Magnum inverters (not really a power factor
issue)
From: boB Gudgel <b...@midnitesolar.com>
Date: Sun, August 02, 2009 12:53 am
To: RE-wrenches <re-wrenches@lists.re-wrenches.org>
Darryl Thayer wrote:
The 120 leg to leg, that is strange. Is it possible the Inverter
has an output not split phase? perhaps 2 phase or 4 phase? giving
the phase to neutral a normal value and the phase to phase a weird
value? I do not think thy would build it this way.
Matt said:
"When I checked phase to phase I also only got 120"
OK, Matt, that part passed right through me... Hmmmm.... (60 Hz
Hmmmm... too)
boB
--- On Sat, 8/1/09, Matt Tritt <solar...@charter.net> wrote:
From: Matt Tritt <solar...@charter.net>
Subject: Re: [RE-wrenches] Magnum inverters (not really a power
factor issue)
To: "RE-wrenches" <re-wrenches@lists.re-wrenches.org>
Date: Saturday, August 1, 2009, 10:43 PM
The next time I'm up there I'll take another tech
with me, plenty of
meters and go through every DC and AC connection (they all
looked good
first time around) to try and get to the bottom of the
problem prior to
taking a harder look at Magnum. I have to say, though, that
I have
heard a couple of comments that tend to suggest that the
inverter might
turn out to be one logical place to look. I like these
inverters a lot,
and I really hope that we find some other issue.
To replay the symptoms, there is no audible or visual (as
in motor
starter noises or dimming light) indication that the pump
is attempting
to do anything other than sit there when inverter voltage
is connected
to it. When the genny power is applied, there is a
discernable working
under a load sound from the engine, and the pump works. I
only had the
homeowner's lousy dime store anaglog meter to work
with, but the
voltage from the inverter was right on 120 volts per leg.
When I
checked phase to phase I also only got 120 - that's
kind of weird, but
it might simply be the meter. All the household loads run
flawlessly
(but this is a pretty fundamental cabin, so the TV and DVD
player are
the most exotic things plugged in. The run to the pump is
adequately
sized - - - - - in other words, it all seems run of the
mill, except
that the pump only ran successfully one time and not on any
further
attempts. Golly..
Matt
boB Gudgel wrote:
Larry
Crutcher, Starlight Solar wrote:
Hey Matt,
I sure wish their techie's would get to the bottom of
it. I am getting
gun-shy about selling Magnum and they are about the best
available for
small 12 volt systems. I have spend hours trying to solve
the problem.
My customer is still not a happy camper.
Larry Crutcher
Starlight Solar
(928) 941-1660
Renewable Energy Products, Service and Installation
Can you get someone to look at the voltage and/or current
going into
that pump ?? Scope ? Meter ?
Even a
power factor meter would have both voltage and current
measurements.
Some even have a mediocre scope built in.
A scope AND a meter is best of course.
Need stats. AC an DC side. AC voltage at
the pump and at the
inverter.
Must have more information. Yes, it
~could~ be a Magnum inverter
issue, but need more information other than "it
doesn't work"
Does the voltage dip when the pump tries to start ?
What is the
maximum Ac and DC current ? Most basic info for
troubleshooting.
The inverter manufacturer can probably help somewhat if
they have this
info.
Just a suggestion here.
boB
On Aug 1, 2009, at 4:28 PM, Matt Tritt wrote:
I took boB's advice and
talked to Magnum
about the problem. Their take on it? "Hmmm, beats
me!" I might be
paraphrasing, but that's the drift. All in all, I'd
say that the
suggestions from the group are at least as good as the
one's from the
manufacturer.
Matt T
Larry Crutcher, Starlight Solar wrote:
Don't forget, this is a
Magnum inverter
and Magnum has issues. I have two customers with
Magnum problems. One
is a washer that will work perfectly on a cheap
import inverter; the
other has a Vizio TV that works fine on shore power
and generator.
Soooo...maybe there are pumps and other items that
are anti-Magnum.
Larry Crutcher
Starlight Solar
(928) 941-1660
Renewable Energy Products, Service and Installation
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