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SMA Tripower Inverter Faults and Repairs

German inverter specialists SMA have been a leading manufacturer in renewable energy technologies for the last 35 years. SMA's three phase Tripower Inverters come in a range of power ratings and have been widely installed in the UK for many years, some of the most popular being the transformerless STP-10000TL, STP-12000TL, STP-15000TL and the STP-17000TL.

We have installed SMA equipment for our own clients for many years and we also have a lot of experience in working with their equipment for new clients on the support side. So if you would like help with diagnosing faults, carrying out servicing or repairs and or are currently without an installer then you will find us well qualified and pleased to help.

SMA Tripower inverters have LCD displays on the front of the chassis, which providing it's working, will highlight any errors with the inverter or the solar PV system that it runs, event numbers will be displayed along with a message. We have listed and described common faults with SMA Tripower inverters and what action to take to resolve them below:

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Repair SMA Tripower Inverter

 

 

 

 

Repair SMA Tripower Inverter

SMA Tripower 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 three phase 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.

  • Event 101-103 - Grid Fault - The inverter is measuring a grid (mains) voltage or a grid impedence that is too high in relation to the parameters that the inverter has been set to safely operate within. If this fault persists contact us to arrange for an engineer to visit to establish whether the fault lies with the inverter or with the grid.
  • Event 202-203 - Grid Fault - The inverter is measuring a grid (mains) voltage or a grid impedence that is too low in relation to the parameters that the inverter has been set to safely operate within. If this fault persists and mains power is available to other local circuits then check that all isolators, MCBs and RCDs on the AC side of the solar PV system are 'On'. If automatic safety devices such as MCBs or RCDs have switched 'Off' then leave them 'Off' and contact us to arrange for an engineer to visit to establish whether the fault lies with the inverter, the supply circuit or with the grid.
  • Event 301 - Grid Fault - The inverter has measured a 10 minute average grid (mains) voltage or a grid impedence that is too high in relation to the parameters that the inverter has been set to safely operate within. If this fault persists contact us to arrange for an engineer to visit to establish whether the fault lies with the inverter or with the grid.
  • Event 401-404 - Grid Fault - The inverter is no longer in grid parallel operation due to frequency fluctations from an unstable grid (mains) connection and has stopped feed‑in operation for safety reasons. If this fault persists contact us to arrange for an engineer to visit to establish whether the fault lies with the inverter or with the grid.
  • Event 501 - Grid Fault - The inverter is measuring a grid (mains) frequency that is either too high or too low in relation to the parameters that the inverter has been set to safely operate within. If this fault persists contact us to arrange for an engineer to visit to establish whether the fault lies with the inverter or with the grid.
  • Event 601 - Grid Fault - The internal monitoring function of the inverter has detected an excessively high proportion of direct current in the grid current. If this fault persists contact us to arrange for an engineer to visit to establish whether the fault lies with the inverter or with the grid.
  • Event 701 - Frq. not permitted - The inverter is measuring a power frequency outside the permissible range that the inverter has been set to safely operate within. If this fault persists contact us to arrange for an engineer to visit to establish whether the fault lies with the inverter or with the grid.
  • Event 1302 - Waiting for grid voltage - Grid Failure - Check AC Circuit Breaker - The inverter understands that there has been a mains failure (a power cut). If this fault persists and mains power is available to other local circuits then check that all isolators, MCBs and RCDs on the AC side of the solar PV system are 'On'. If automatic safety devices such as MCBs or RCDs have switched 'Off' then leave them 'Off' and contact us to arrange for an engineer to visit to establish whether the fault lies with the inverter, the supply circuit or with the grid.
  • Event 1501 - Reconnection fault grid - The inverter understands that there has been a mains failure (a power cut). If this fault persists and mains power is available to other local circuits then check that all isolators, MCBs and RCDs on the AC side of the solar PV system are 'On'. If automatic safety devices such as MCBs or RCDs have switched 'Off' then leave them 'Off' and contact us to arrange for an engineer to visit to establish whether the fault lies with the inverter, the supply circuit or with the grid.
  • Event 3301-3303 - Unstable operation - The ten-minute average value of the grid voltage is no longer within the permissible range. The grid voltage or grid impedance at the connection point is too high. The inverter disconnects from the utility grid to maintain power quality. If this error persists then we would advise that the DC side of the system including and excluding the inverter is tested.
  • Event 3401-3402 - DC overvoltage - Disconnect generator - 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 the DC side of the system is disconnected using either the built in DC isolator at the bottom of the inverter or the DC Isolator installed between the panels and the inverter (if available) and contact us to test the DC side of the system including and excluding the inverter.
  • Event 3501 - Insulation Failure - Check generator - 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. 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 book an engineers visit in order to carry out a full system test, identify the source and rectify the fault.
  • Event 3601 - High discharge curr. - Check generator - 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. 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 book an engineers visit in order to carry out a full system test, identify the source and rectify the fault.
  • Event 3701 - Resid.curr.too.high - Check generator - 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. 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 book an engineers visit in order to carry out a full system test, identify the source and rectify the fault.
  • Event 3801-3802 - DC overcurrent - Check generator - 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 the DC side of the system is disconnected using either the built in DC isolator at the bottom of the inverter or the DC Isolator installed between the panels and the inverter (if available) and contact us to test the DC side of the system including and excluding the inverter.
  • Event 3901-3902 - Waiting for DC start conditions - Start cond. not met - The inverter is measuring low DC voltage. Assuming that there is adequate sunlight, 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, then if this fault persists, we would advise that the DC side of the system including and excluding the inverter is tested.
  • Event 4001 - String X defect. - Do not disconn. ESS - There is reverse current in the string displayed or the polarity of this string is reversed. Further strings could also be affected. The PV array is short-circuited by the inverter. The inverter will emit a beeping sound when this error is present. DO NOT disconnect the built in isolator or switch off any accompanying isolators until it is dark. Once safe to do so we would advise isolating the inverter from any AC or DC voltage sources and that the DC side of the system including and excluding the inverter is tested before the inverter is reconnected.
  • Event 4002 - String X low power - Check generator - The inverter is measuring a weak or broken string. Assuming that there is adequate sunlight, 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, then if this fault persists, we would advise that the DC side of the system including and excluding the inverter is tested.
  • Event 4003 - String X defect. - Do not disconn. ESS - The inverter is measuring a weak or broken string. The PV array is short-circuited by the inverter. The inverter will emit a beeping sound when this error is present. DO NOT disconnect the built in isolator or switch off any accompanying isolators until it is dark. Once safe to do so we would advise isolating the inverter from any AC or DC voltage sources and that the DC side of the system including and excluding the inverter is tested before the inverter is reconnected.
  • Event 4005 - Part.str. X low p. - Check generator - The inverter is measuring a weak or broken substring. Assuming that there is adequate sunlight, 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, then if this fault persists, we would advise that the DC side of the system including and excluding the inverter is tested.
  • Event 6001-6445 - Self diagnosis - Interference device - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • Event 6313 - Self diagnosis - Interference device - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • Event 6429 - Self diagnosis - Interference device - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • Event 6430 - Self diagnosis - Interference device - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • Event 6432 - Self diagnosis - Interference device - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • Event 6433 - Self diagnosis - Interference device - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • Event 6437 - Self diagnosis - Interference device - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • Event 6438 - Self diagnosis - Interference device - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • Event 6439 - Self diagnosis - Interference device - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • Event 6501-6502 - Self diagnosis - Overtemperature - The ambient temperature around the inverter is too hot. 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.
  • Event 6603-6604 - Self diagnosis - Overload - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • Event 6701-6702 - Comm. disturbed - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • Event 6801-6802 - Self diagnosis - Input A defective - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • Event 6901-6902 - Self diagnosis - Input B defective - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • Event 7001-7002 - Sensor fault fan permanently on - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • Event 7101-7110 - Various messages - There are various messages that can be present alongside these fault codes. These are mostly related to the SD card and firmware. Contact us with the exact message as displayed on the screen to discuss what these issues might be and how they can be resolved.
  • Event 7201-7202 - Data stor. not poss. - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • Event 7303-7326 - Various messages - There are various messages that can be present alongside these fault codes. These are mostly related to internal components that are showing errors but the errors aren't serious enough to prevent grid feed in. Contact us with the exact message as displayed on the screen to discuss what these issues might be and how they can be resolved.
  • Event 7401 - Varistor defective - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • Event 7508 - Fan fault - Clean fan - The temperature inside the inverter is too hot which the inverter understands is due to dust, fluff or a similar obstruction blocking the vents or fans inside the chassis. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • Event 7701-7703 - Self diagnosis - Interference device - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • Event 8001 - Derating occurred - The inverter has measuring a temperature for more than 10 minutes that is too hot and has reduced power output to protect itself. 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.
  • Event 8104 - Interference device - This is an internal error within the inverter. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • Event 8201 - Interference device - Do not disconn. ESS - This is an internal error within the inverter. The inverter will emit a beeping sound when this error is present. DO NOT disconnect the built in isolator switch or switch off any accompanying isolators until it is dark. Once safe to do so we would advise isolating the inverter from any AC or DC voltage sources and that the DC side of the system including and excluding the inverter is tested before the inverter is reconnected.
  • Event 8202 - Connect ESS, do not open cover - This is an internal error within the inverter. The inverter will emit a beeping sound when this error is present. DO NOT disconnect the built in isolator switch or switch off any accompanying isolators until it is dark. Once safe to do so we would advise isolating the inverter from any AC or DC voltage sources and that the DC side of the system including and excluding the inverter is tested before the inverter is reconnected.
  • Event 8203 - Interference device - Do not disconn. ESS - This is an internal error within the inverter. The inverter will emit a beeping sound when this error is present. DO NOT disconnect the built in isolator switch or switch off any accompanying isolators until it is dark. Once safe to do so we would advise isolating the inverter from any AC or DC voltage sources and that the DC side of the system including and excluding the inverter is tested before the inverter is reconnected.
  • Event 8301 - Lightn.prot.inactive - Chk lightn.prot.A/PE - At least one surge arrester within the inverter is defective. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • Event 8302 - Lightn.prot.inactive - Chk lightn.prot.A/PE - At least one surge arrester within the inverter is defective. If after the system has been safely shutdown and restarted this condition persists then contact us.
  • Event 8401 - Overheating - Disconn. device from generator and grid - The inverter has overheated. Isolate the inverter from all AC or DC voltage sources and 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.

 

What Our Customers Say:

"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

Recomendation via Facebook

"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

Review via Google

"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

Recomendation via Facebook

"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

Recomendation via Facebook

"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

Review via Google

"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

Recomendation via Facebook

"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

Review via Google

"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

Recomendation via Facebook

"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

Recomendation via E-Mail

"New meter doing the business nicely. Good job, great service and friendly with it. Our thanks." Richard Illsley, Marlborough

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