Mark Dickson wrote:
Hi Bob,
From what I understand the "State 108" code means that the grid frequency is out of whack.
Frequency and voltage windows are both related to anti-islanding
detection, so I don't doubt you would receive this message.
I would be surprised if the error was not a result of a high impedance
(weak) grid at the inverter. Lowering the voltage at
the inverter, like, tapping down a transformer if possible (industrial
installation?) may be one answer. I remember Daryl
Thayer had to do that on one of his grid tie (not AC coupled) installs
to fix this sort of problem.
boB
It was explained to me by Fronius techs that: the IG sends out pulses that if
the grid is in good shape it is absorbed into the grid. If the frequency is
off then it bounces back to the IG triggering the State 108.
Your response does give me something to think about though. . .
Mark Dickson
Oasis Montana Inc.
877-627-4778 toll-free
406-777-4321 (0830 fax)
www.oasismontana.com
www.grid-tie.com
www.PVsolarpumps.com
-----Original Message-----
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of boB Gudgel
Sent: Sunday, April 19, 2009 11:42 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] Fronius IG4000 problem
Mark Dickson wrote:
>> the array output climbs above 3000 or so watts, we continually get a
“State 108” code and shut down cycles each time a relay trips on a
diversion load...
Sounds to me like your diversion load may be too small and/or the grid
is weak at the Fronius end. When the diversion loads suddenly go away due to
their "relays tripping", the Fronius', having lots of power to sell,
raising the AC grid voltage right out of the UL1741 / IEEE Voltage
window limit (132V ?).
It hen has to shut down and disconnect in order to stop the apparent
islanding condition. That's probably what state 108 is trying to tell you ?
Looks like your Fronius inverter is most likely working just fine ?
boB
Larry,
I am having a somewhat similar problem with a recently installed
IG5100. I have it installed in conjunction with an Outback battery
based system for AC coupling. We have it set up to divert its loads to
an electric ice melter and then to a large electric heater as the
battery voltages climb. A third relay cuts the array power between the
Fronius and the AC panel if the battery voltage continues to climb to
unsafe levels.
When we have heavy sunshine and low house loads (second home) and the
array output climbs above 3000 or so watts, we continually get a
“State 108” code and shut down cycles each time a relay trips on a
diversion load. I have worked with both Outback and Fronius (who have
been great!) but at this point we are all baffled. I think my next
step, especially after reading the above post is to replace the
Fronius. Then as a last resort swap the IG5100 out to a couple of SMA
3000US’s (a 6000US does not configure well with the 28 evergreens).
Any input from you guys would be greatly appreciated!
Mark Dickson
Oasis Montana Inc.
------------------------------------------------------------------------
*From:* re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] *On Behalf Of
*William Miller
*Sent:* Sunday, April 19, 2009 7:59 PM
*To:* RE-wrenches
*Subject:* Re: [RE-wrenches] Fronius IG4000 problem
Larry:
We've installed about 20 IG/LV series inverters. Some failures
required only replacement of GF cards, most required replacement
inverters. We've had several DOA when new, one was replaced by Fronius
with a rebuild even when we warned in writing that we would not accept
a rebuild (it had multiple KOs pulled in the chassis -- just not
acceptable). As of right now, we have 7 in non-operational status
awaiting replacement. No kidding.
There maybe be one or two that have not failed, but this is offset by
those that have failed multiple times. The biggest failure rate is of
the 6 LV4550s on an exterior north wall 2 blocks from the beach
(http://millersolar.com/Portfolio/Commercial/Voler/voler.html). These
have been replaced three or four times each and are coming out as soon
as we finalize the paperwork, with 3 10K Plus series inverters going
in. This will require extensive rework, but we are being paid for our
time. The Fronius staff has been very nice, but pretty slow to respond.
I hate to report bad reviews to this forum, but it is what it is.
William Miller
At 02:51 PM 4/19/2009, you wrote:
William,
100% of what quantity? Are there any special conditions that may have
contributed? Were they minor problems?
Larry
------------------------------------------------------------------------
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