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ABB / Power One Aurora Inverter Faults and Repairs

Power One, at one point were the second ranked inverter manufacturer in the world and there are many Power One Aurora Inverters installed in the UK. The most popular models being the Uno PVI-3.0-TL-OUTD and the Uno PVI-3.6-TL-OUTD. Power One was purchased by electrical equipment giants ABB in 2013. As part of their purchase ABB took over the guarantee responsibilities from Power One.

As a result of their popularity we have become very familiar with repairing, servicing and diagnosing faults with Power One Inverters. Power One Aurora inverters, both single phase (Uno) and three phase (Trio) have an LCD display on the front of the chassis. Identifying error codes shown on the display (assuming the display is working) is usually the best place to start in diagnosing the fault and getting systems using Power One inverters up and running again.

NB: "E031 - Error Read V" or "Int.Error E031" This is a common error found with Power One Aurora Inverters. This is an error inside the inverter relating to damaged external relays. This error is often accompanied by a humming noise when the inverter tries to start up and presents itself just before you would typically expect the inverter to connect to the grid and start generating. Damaged relays can be replaced and we can source the replacement parts required to do the work. However, given the age of the units that usually demonstrate this fault and the comparitively low cost of a replacement, when Power One Aurora units are out of warranty and have E031 relay failures, we usually recommend that the inverter is replaced.

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Repair Power One Inverter

 

 

Repair Power One Inverter

ABB / Power One Aurora Inverter Faults and Warnings:

Some of the advice we give related to identifying, confirming and or resolving some of the faults detailed below, starts with safely shutting down and restarting the inverter and the solar PV system. This is something that nearly all solar PV systems installed in the UK would have been designed to be carried out safely by the solar PV system owner. However, paperwork, schematics and manuals are not always clear or available, so if you have any concerns about how to do this, we will always be more than happy to talk you through the process over the telephone at no charge.

  • W001 - Sun Low - The inverter is measuring low DC voltage that it believes is due to low solar irradiance. Low irradiance (sunlight) is to be expected in the mornings and evenings and on cloudy days and the inverter, if the fault passes on it's own relatively quickly might simply be acknowledging this. However should there be plenty of sunlight and assuming that this is an existing installation that has been specified correctly, no changes near the installation area have been made and the system has operated before without problems. This could indicate either a problem with the panels or with the inverter. If you are concerned and or the fault doesn't clear itself, then we would advise that you Book an Engineer to test the DC side of the system including and excluding the inverter.
  • W002 - Input UV - The inverter is measuring low DC voltage. Assuming that this is an existing installation that has been specified correctly, no changes near the installation area have been carried out and the system has operated before without problems. Anything other than a brief warning on the display at startup or shutown with this error code could indicate either a problem with the panels or with the inverter. If you are concerned and or the fault doesn't clear itself, then we would advise that you Book an Engineer to test the DC side of the system including and excluding the inverter.
  • W003 - Grid Fail - The inverter is measuring grid (mains power) characteristics outside of it's pre-set safe operating parameters. If the situation persits then the inverter will not startup. We would advise that Book an Engineer to identify whether the issue is with the inverter or with the mains supply.
  • W010 - Fan Broken - This error indicates an internal fan failure within the inverter.
  • W011 - Bulk UV - The inverter is measuring under voltage. Assuming that this is an existing installation that has been specified correctly and has operated before without problems. This could mean either a problem with the panels or with the inverter. We would advise that Book an Engineer to test the DC side of the system including and excluding the inverter.
  • W012 - Batt. Flat - The inverter is stating that the buffer battery inside the inverter is flat i.e. is not charging due to either a faulty battery or an internal charging error. To ensure that this is the case safely isolate the inverter and then restart it, if the time and date has reset itself to it's factory default time, reset the date and time to the correct date, then restart the system again. If the time again resets to the factory default time and date then there is either an issue with the battery which should be replaced or an internal fault within the inverter preventing the battery from being charged. Contact us to discuss how to proceed with this fault.
  • E001 - Input OC - The inverter is measuring too much current from the panels. Assuming that this is an existing installation that has been specified correctly, hasn't recently been changed or added to and has operated before without problems. This could mean either a problem with the panels or with the inverter. We would advise that you Book an Engineer to test the DC side of the system including and excluding the inverter.
  • E002 - Input OV - The inverter is measuring too much voltage from the panels. Assuming that this is an existing installation that has been specified correctly, hasn't recently been changed or added to and has operated before without problems. This could mean either a problem with the panels or with the inverter. We would advise that you Book an Engineer to test the DC side of the system including and excluding the inverter..
  • E003 - No Parameters - This is an internal error related to the main microcontroller and communications within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • E004 - Bulk Overvoltage - The inverter is measuring too much voltage from either the panels or the mains. Assuming that this is an existing installation that has been specified correctly, hasn't recently been changed or added to and has operated before without problems. This could mean either a problem with the panels, the mains or with the inverter. We would advise that Book an Engineer to test the whole system AC and DC as well as the inverter.
  • E005 - Comms. Error - There is a communications error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • E006 - Output OC - Output Overcurrent, this fault/warning occurs when the output current exceeds the threshold that the inverter has been designed for. Assuming that this is an existing installation that has been specified correctly, hasn't recently been changed or added to and has operated before without problems. This fault would suggest that there is a fault within the inverter. We would advise that Book an Engineer to test the DC side of the system including and excluding the inverter.
  • E007 - IGBT SAT - This fault is an indication that the IGBT components within the inverter have become saturated. There are many factors that could contribute to this such as rapidly changing AC voltages from the grid or changing DC voltages from the panels. If the fault doesn't clear itself and the measured (excluding the inverter) conditions are stable it would most likely indicate an internal fault within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • E009 - Internal Error - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • E010 - Bulk Low - The inverter is measuring low voltage. Assuming that this is an existing installation that has been specified correctly and has operated before without problems. This could mean either a problem with the panels or with the inverter. We would advise that Contact us to discuss how to proceed with this fault.
  • E011 - Ramp Low - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • E012 - DcDc Fail - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • E014 - Over Temp - The temperature inside the inverter is too hot, over the safe 60 degree limit. This could be due to a number of factors, for example 1) If the inverter is exposed to direct sunlight 2) If the inverter has been installed without adequate ventilation around the chassis which would allow excess heat to dissipate 3) The inverters components are getting too hot due to an internal component fault. If the unit isn't running hot and if after the system has been safely shutdown and restarted this condition persists then contact us
  • E015 - Bulk Cap Fail - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • E016 - Inverter Fail - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • E017 - Start Timeout - This error might present itself when startup voltages are hovering around the threshold required to fully start the inverter in conditions of low irradiance. Low irradiance (sunlight) is to be expected in the mornings and evenings and on cloudy days and the inverter, if the fault passes on it's own relatively quickly might simply be acknowledging that power is present but not at a level sufficient enough to fully power the inverter. However should there be plenty of sunlight and assuming that this is an existing installation that has been specified correctly, no changes near the installation area have been made and the system has operated before without problems. This could indicate either a problem with the panels or with the inverter. If you are concerned and or the fault doesn't clear itself, We would advise that Book an Engineer to test the DC side of the system including and excluding the inverter.
  • E018 - Ground Fault - This error is generated when during normal operation of the inverter, a leakage current to ground/earth is detected on the DC side of the system, although it is also possible that the inverter generates the alarm E018 message due to AC leakage currents connected to the capacitive nature of the photovoltaic generator compared to ground/earth. For as long as the situation persits then the inverter will not startup. Earth / Ground Faults (also called Iso or Isolation Faults) often present themselves when it is raining or at times of high humidity when moisture can enter the system. These faults often clear when conditions improve but they will not get better by themselves, potentially becoming more dangerous over time. We would advise that you We would advise that Book an Engineers visit in order to carry out a full system test, identify the source and rectify the fault.
  • E019 - Ileak.sense Fail - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • E020 - Self Test Error 1 - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • E021 - Self Test Error 2 - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • E022 - Self Test Error 4 - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • E023 - DC In Error - Rapidly changing DC voltages due to rapidly fluctuating irradiance levels or possibly grid disturbances might be the likely cause of an E023 error. If the fault doesn't clear itself and the measured (excluding the inverter) conditions are stable it would most likely indicate an internal fault within the inverter. If after the system has been safely shutdown and restarted this condition persists contact us.
  • E024 - Internal Error - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • E025 - Riso Low - This error is generated when during normal operation of the inverter, a leakage current to ground/earth is detected on the DC side of the system, although it is also possible that the inverter generates the alarm E018 message due to AC leakage currents connected to the capacitive nature of the photovoltaic generator compared to ground/earth. For as long as the situation persits then the inverter will not startup. Earth / Ground Faults (also called Iso or Isolation Faults) often present themselves when it is raining or at times of high humidity when moisture can enter the system. These faults often clear when conditions improve but they will not get better by themselves, potentially becoming more dangerous over time. We would advise that Book an Engineers visit in order to carry out a full system test, identify the source and rectify the fault.
  • E026 - Vref Error - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • E027 - Error Meas V - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • E028 - Error Meas F - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • E029 - Mid Bulk OV - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • E030 - IError Meas Ileak - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • E031 - Error Read V - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us. (NB: Please see the note about this error in the introduction at the top of the page)
  • E032 - Error Read I - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • E033 - UTH - The ambient temperature outside the inverter is too cold, under the safe -25 degree limit. If the unit isn't in such a cold environment and if after the system has been safely shutdown and restarted this condition persists then contact us.
  • E034 - Interlock Fail - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • E036 - V Out Avg Error - The grid voltage as measured by the inverter is too high. This may be caused by too high a grid impedance. In the final stage of the timeout, the inverter limits the power to check whether the grid voltage has stabilised into regular parameters. If the situation persits then the inverter will not startup. We would advise that you Book an Engineers visit who will be able to identify whether the issue is with the inverter or with the mains supply.
  • E049 - AC FF Error - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • E057 - Vbulk Reading Error - The inverter is measuring too much voltage from the panels. Assuming that this is an existing installation that has been specified correctly, hasn't recently been changed or added to and has operated before without problems. This could mean either a problem with the panels or with the inverter. We would advise that you Book an Engineer to test the DC side of the system including the inverter.
  • E058 - Pin Vs Pout Check Error - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.

We are familiar and comfortable in working with these units, please let us know if there is anything that we can help with with regards to error codes and faults, repairs, specifying replacements and or if you have any performance or safety concerns.

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Solar PV Inverter Replacement

If you have a faulty inverter, we offer an efficient, value for money, hassle free inverter replacement service. We offer good advice and install quality equipment with comprehensive warranty and support options. We will test the rest of the system as part of the service, take care of all hardware deliveries, record your new unit's serial number and confirm the warranty details with the manufacturer.

Our engineers work cleanly and will dispose of any unwanted boxes, faulty equipment and packaging.

Many modern inverters can now use wireless home networks to transmit solar generation data to PCs, tablets and smartphones, so if you would like something like this, let us know and we will be happy to set it up as part of the installation.

Solar PV Inverter Replacement

 

Solar Power System repair

Problems with your solar power system? Solar panels not working? Solar Inverter Fault? Leaking Roof? Established in 2007, we are one of the longest serving renewable energy companies around and experts at fixing all things Solar.

If your original solar installer and or their warranty providers are no longer trading and your solar PV system isn't working, underperforming, has developed a fault or needs to be moved, refurbished, changed, decommissioned (permenantly or temporarily) then we can help.

If you have an issue, any issue with your solar PV system, including repairs needed to roofs, mountings, cables, isolators, meters, inverters, batteries and connectors; anything involved with repairing a residential and commercial solar PV systems of any size, then we can help.

Solar Power System repair

 

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"Inverter broke down, contacted Glen, on his advice new inverter delivered within days. Glen then came and fitted new inverter within 90 mins, works perfectly. Glen is very friendly very efficient, really knows his work. Can highly recommend Glen, any other problems with solar system and Glen will be the one I call." - Carl Tyler, Salisbury

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"I spoke to Glen as my inverter was coming to its end of life (10 years). Glen quickly appraised me of the many different inverters that I could use. I selected a similar SMA type. The next week Alex replaced it with a new inverter with WiFi connectivity. Everything is working perfectly (thanks Alex) in-addition I can now view my information through the Sunny Portal. A BIG thanks to Glen and Alex, superb service, highly recommended!!!!!" - David Powell, Worcester

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"Rang In Balance energy after been let down. Scott was very helpful after explaining the problem. Explained everything to me. Sent a quote within a day. Arranged an appointment that suited me. Arrived at the time quoted the engineer was very polite. Explained everything again and sorted the problem... I would highly recommend this company for solar panel repairs.. And if needed again won't hesitate to contact them. Also the quote was for a brand new inverter. But as this wasn't needed only got charged for the work that was done.. Excellent service. Thankyou so much." - Julie Temperton, Gilberdyke

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"What a pleasant surprise. I found InBalance via Google when the inverter on my solar PV system failed and I was trying to find someone knowledgeable and reliable to fix or replace it. My first impression was that the comprehensive information on their web-site was a good start, far better than the web-sites of most of the shysters who now seem to fill the world of solar PV. The next positive was Scott of InBalance's rapid response, first to my initial enquiry and subsequently to visiting to analyse and report on the problem and then removing and replacing the inverter within just a couple of days. I hope I don't ever have another problem with my solar PV system but, if I do, the first people I shall call will be InBalance. Outstanding service and thoroughly recommended." - Tim Petty, Ilminster

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"We had been let down by a failure on our system,and the manufacturer of the part was no longer trading. We called Glen during the afternoon and he was there in the evening. He examined the system and recommended a replacement manufacterer, promising to come back and fit in the new part once it arrived. We informed Glen of the arrival on a Friday PM, he was there fitting the new part by 10:30 on the following Monday. Of course it worked. That is what you call service, and guess who is looking after all our requirements in the future. Highly recommend this company." - Gill Spencer, Newbury

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"Yes, thank you! The Inverter appears to be working well. Scott was very efficient and courteous, he couldn't have been more helpful. Thank you very much for your prompt and efficient service, apart from the expense (not your fault), it has been a pleasure working with you." Tracey Smale, Dartmouth

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"In Balance contacted us promptly after we made an enquiry, Glen telephoned and arranged to visit our property to identify the fault, he arrived the following day! Brilliant as when the system is down it isn't earning us money. We decided to have a new inverter installed as our original one was 9 years old. Glen ordered the unit which was delivered to our property he then arrange to fit the unit the following day. He really could not have done it any quicker so thank you for that. Good job done for reasonable money. Highly recommended." - Geoff Thomas, Abingdon

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"Contacted Glen after being let down by 2 companies. He visited promptly, researched my system and assisted me with getting my solar system up and running again. Amazing man. Will definitely be my first and only port of call for any future issues. Friendly, supportive, knowledgeable and reliable. Highly recommend him." Margaret Bissett, Chisledon

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"Can't recommend In Balance Energy and Glen enough. I had a fault in a solar tile that needed tracking down. Other companies did not want to know as too much hassle. Glen saw it as a challenge and was all over it. Problem fixed and full power restored. Well done and thanks." Paul Rodwell, Wallingford

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"We were very relieved to find Glen when our Solar Panel system stopped working, as our original supplier had gone out of business. We cannot praise Glen's persistence enough as he thoroughly reviewed the system to identify the faults and repair it, despite the searing heat of last summer. He also talked to Solar Edge and provided fault data to enable us to get a replacement part under warranty. Many thanks Glen for getting us up and running again!" - Jane Pearce, Highworth

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"Excellent service. We contacted Glen when our solar PV system stopped working. His response was prompt, he explained all we needed to know and got the system up and running after just a matter of days. Glen was friendly, professional and most of all reliable and we would have no hesitation in highly recommending him." Fran Armstrong, Market Lavington

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"Glen was very helpful and very reasonably priced. I would recommend him, and use him again in future if I need any solar work." Venu Jega, Highworth

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"Very efficient reliable company. Scott was the engineer who attended to fix my solar breakdown, which he did very quickly and reasonably. Would recommend very highly." Paul Slatter, Ivybridge

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"Outstanding. Conscientious, thorough, friendly and reasonably priced service. Highly recommended. Made our solar panel battery system safe, correcting the sub-standard work of others. Will always use this trustworthy PV electrician. Even after the work was completed, he studied the manual for our system and assisted with resolving further problems. Thanks Glen." Rob Barnes, Royal Wootton Bassett

Review via Cylex

"Very decent with a helpful attitude and expert in the technical side and reliable too. Had to integrate with our roofers to use their scaffolding before and after their work to take down and reinstall our PV panels. Helpful scheduling. Up and running again to our satisfaction at a decent price." David Ballard, Ramsbury

Review via Google

"I got in touch with Glen as our old converter was no longer working due to its age (9 years). Glen quickly diagnosed the inverter and tested the solar panels. The next week replaced it with a new inverter with WiFi connectivity. Everything is working again perfectly and I can see what power it's generating on a phone App now. Great service!!" Peter Dowsett, Chippenham

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"Glen replaced our inverter. Excellent honest guy. We wouldn’t deal with anyone else highly recommended." Nicola Moger, Devizes

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"Our inverter failed and as our installer had gone out of business did not know what to do. Contacted Glen who was brilliant. Came out checked the failure dealt with the manufacturer and all aspects of the warranty claim.New inverter received under warranty and Glen came out and fitted the new one straightaway. Superb service from a very professional and helpful person. Highly recommend this company." Martin Brailey, Wokingham

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"Had a tricky fault on my (8 year) old system which Glen narrowed down and has now sorted at a very reasonable price. We have also had our faulty inverter replaced by In Balance; would recommend if he covers your area!" Peter Nobes, Bath

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"My inverter failed and Glen very quickly got my system up and running again. He was very professional but explained everything to me. Many thanks Glen and I've already recommended him." Di Foxwell, Wroughton

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