Aurora Uno PV Inverter Riso Fault
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- Опубліковано 3 чер 2020
- Aurora Uno RISO Fault..
Our favourite PV inverter the Aurora Uno strikes again!!
This is the 2nd one this week This time we have the RISO fault displayed on the screen. Usually we come across the deadly E031 code which pretty much means, you need a new one!!
Watch me as I try to find the cause of the fault and what I did to fix it..
Please comment below with what you would of done as I'm always learning..
Don't forget to subscribe and thanks for watching.
Any updates on the cause of an internal Riso fault like this? I've just experienced the most amazing - and unfortunate - coincidence with a couple of these inverters.
My Aurora One developed the common E031 fault, so I replaced all 4 relays. Refitted the inverter, and it immediately returned a Riso of 0.00 ohms, regardless of which of the two PV strings were connected - very strange. As a complete ZERO-ohm Riso on BOTH strings didn't make much sense, I assumed that I'd messed up my repair and caused this new issue myself, so I bought a professionally-refurbished Aur-One to replace it with. Fitted the new one, and it worked - for around 5-10 minutes! I'm sure I heard a wee 'zzzp' from inside it, my RCD was tripped, and when I reset the RCD, this new inverter ALSO gave a Riso of absolute zero! What the heck?!
Ok, going a bit crazy, I checked the cabling of the panels, and replaced the original connectors with MC4s, even tho' they all looked ok, and the cables had no visible damage at all. Unsurprisingly, this made no difference - still a complete ZERO Riso! By now, I had to suspect the ridiculous - TWO Aur-Ones had developed an internal Riso fault, at pretty much the same time!
I essentially proved this when I luckily found a new-old-stock Aur-One which I got for a good price, and fitted this. It worked perfectly - and still is, months later.
That means that TWO Aur-Ones developed the SAME zero-Riso fault within minutes of each other - no wonder it drove me crazy.
I opened my original inverter for a physical look of the boards, but could see nothing amiss. The refurbished one was returned under warranty, and they provided a full refund. I did ask if they'd let me know what the cause was, but they sadly haven't replied, so this remains a mystery.
I'd love to know what the internal cause of this Riso fault is 🙂
I replaced a customer's Power One PVI-3.8 with a "Missing Grid" error about a month ago. The new inverter worked for the first few weeks, but after the first rain its been having a ground fault with RISO measuring 0.1 MOhm. Anyways, headed back today to check the panels and connectors like you did in this video. Cheers!
Check the main string connections from inverter to the 1st panel(s) They maybe corroded. Try and keep all cables including mc4 plugs off of the roof. They are a sucker for picking up riso faults. Good luck.
@@repsyltd Will do, thank you for the suggestions!
Thanks for the video and info. My system has failed at some point over the last month or so, within a few weeks of a smart meter being installed - coincidence? - but I can't get close enough to the unit to do anything myself (mobility and access issues). Installer went bust a couple of years ago (then reopened under new company) so looks like I've got some fun & games with the insurer/warranty, and I've got to find an electrician to do the work. Sheesh!
A friend had the same issue and finally discovered that on grid side, it was lightning protection cartridge failing. It was no external sign of failure but immediatly after replaced, the system worked fine again.
Hello can you tell me replace item. Varactor or mov
Those panel leads look like Amphonal H4 connections. They melt and fail all the time. MC4 is the way to go. Also don't plug Amphonal to MC4. Only MC4 to MC4
same problem as you. Did the new inverter cure it please?
yes it did!! Strings were all fine. New inverter was needed.
6:17 that is a really tough cable.
Well weathered anyway...
Hola
does it has a zero export built in systeme ?
No, this is an old old inverter that definitely wouldn't of come under the g100 rules for today.
Always problem riso 😑
My alarm is on .what is wrong?
What code was showing?