MPP PIP2424LV-MSX Fault 51

AZ_Tekkie

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So last night i started getting a fault code 51 on my pip. Quite annoying because i've got my 3d printer and internet running off of it and killed a print twice now. 51 says the inverter was overloaded, but i've never had more than a 50% load on it. After removing DC and reconnecting it powers right back up. Any one else ever get that error when it's not overloaded? Think it could be on the way out? Been in production now for almost 2 years and the first issue i've had with it. Already emailed MPP support to see if they have any ideas.
 

Korishan

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Hmm, have you checked all the fans to make sure they are all functioning correctly? Also checked the innards to make sure no hairballs made a home in there?

I would think that the overload would be detected by amp throughput, and not be heat. Altho, I suppose they could be tied together. Of course, if the shunt can't dissipate the heat from being dirty, it could cause more resistance and make the PIP "think" there's more load than there really is.
 

AZ_Tekkie

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Well that sucks. Tonight i hear a loud bang, and everything goes dead. Opened up the case and 3 transistors exploded.


image_pztyec.jpg
 

jdeadman

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Yuck. Not fun


Looks like that Capacitor Took a hit
 

Korishan

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Youch! Now that you have 3 failures, I'd recommend you replace all those on that leg. So at least 5. Maybe you can upgrade the FETs to a better one. Just need to make sure you match the frequency and trigger voltages (not sure what else would need to match, tho)

+1 jdeadman. That one Cap looks like it may have been damaged. The one in the middle is a little blackened, but may be fine. The left on is leaning in looks injured. At least, from this angle

I don't recall, which inverter is this one?
 

AZ_Tekkie

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There's only 4 of that particular FET, the others down the line have different numbers. I think the force just pushed that capacitor out so it's leaning forward. There's some black marks on it but might be alright, may replace them anyway as they're pretty cheap. How would i go about finding better FETS? I've never bought or replaced a FET before.
 

AZ_Tekkie

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@jesusangel Know of any good place to buy from? I've looked around for that part and places like mouser and digikey are out of stock on them. I'm certainly capable of soldering in the new ones. Just saying i've never done it before or ordered a set so i'm just unsure what makes an upgraded FET a compatible replacement. I've watched plenty of videos on people swapping them out and i'm proficient in my solder skills.
 

not2bme

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I'm following this thread as I also have the same model. I'm curious what caused the failure because it looks like they used a decent name brand FET (Siemens/Infineon). Is it possible after several years that they loosen up due to the heat contractions. How tight are the screws on the other transistors mounted on the heatsink? Do you have the temperature of the PIP prior to the blow up? Was it hot leading up to the day of failure?

Looks like Digikey has plenty of the automotive grade version https://www.digikey.com/product-detail/en/infineon-technologies/AUIRGP4066D1/AUIRGP4066D1-ND
 

AZ_Tekkie

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I was watching the heat on the temp readout showed 38c. I had also cut back load to 20%. It was pretty dusty inside so i don't doubt that it could have caused the cooling to be less efficient. Once i fix, probably going to blow it out every 3-6 months or install some removable dust filters on the intakes.

What makes it automotive grade?

Anyone know the difference between ixxh80n65b4h1 and ixxh80n65b4, other than price i don't see any change in specs. The later is in stock and cheaper than the h1
 

AZ_Tekkie

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Closer view of the carnage. Not a peep from Mppsolar after i told their support the mosfets blew. Suppose all they'd do is sell me a replacement board.


image_ncqfoq.jpg
 

AZ_Tekkie

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Got my answer from MPP. $160 for the main board and $65 for shipping. Hopefully the 60 I spent on mosfets does the trick.
 

glyndwr1998

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AZ_Tekkie said:
Got my answer from MPP. $160 for the main board and $65 for shipping. Hopefully the 60 I spent on mosfets does the trick.

At least the mainboard is not extra extortionally expensive.

You are probably better off upgrind the mosfets to much better quality ones anyway, provided the original bang hasnt destroyed other components when it blew.

If the mainboard doesnt come back to life when you replace thise mosfets, and you have no options other than to get a new mainboar, id also choose to replace theose mosfets before you install it.#

Its been a few years now since i reserched the MPP inverters,, and at the time there was alot of australian users who were reporting failures of a simlar nature and uploaded their videos onto youtube for othere too see.

Good luck, i hope the replacement fets work ok and you get the inverter back up and running.

Anthony.
 

AZ_Tekkie

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welp, installed the new mosfets and when the unit powers on as soon as it start inverting it throws error 06 and shuts off. Guess i have to bite the bullet and get the whole board or a new inverter.
 

AZ_Tekkie

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Noob move, plugged one of the ribbon cables into the wrong port. Glad i took photos before removing everything, decided to give it the once over to compare and make sure i didn't make a mistake. Back up and running :D

got the new board from MPP. Wish i had good news, but now the inverter goes into a boot loop if i try to turn on. If i leave it in standby though it communicates with the pc and is currently charging my batteries from the grid. Not sure if they sent me a bad board or it has some other issue with the parts not replaced.
 

not2bme

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Glad you're up again! Too bad the mosfets repairs didn't work.
 
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