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Thanks for the advice, I will battle on. I have checked the electrolytic caps on my lcd and all appear in spec, puzzling. However its only a display not a controller as such so really its just a pain. Unless it is a controller of such?
AFAIK all of the PJ LCDs are just displays with sensors, and do absolutely no controlling. Again, I've never had one of their grid-tie units, so this is just a guess.
I have 2 power jacks, a 2012 one and the 2014 one with the display. I thought I would try and resurrect my 2012 one with replacing 2 IGBT's that had shorted G60N100 with FGL60N100BNTD. However, I replaced them, checked the dc and ac side and all in spec. I connected it to the grid without a solar panel just to see if I get anything, and pop. Just blew 2 IGBT's at 9 pounds a pop in the UK. Am I missing something here, cause this is going out the window freestyle, I cant believe this is so difficult.
Damage often goes upstream to locations that might not be immediately visible. Replacing just the visible damage may not solve the actual issue that caused the visible damage.
Thanks Sid,
So really start at the grid and work backwards towards the IGBT's, I wonder why connecting this just to the grid without a panel popped the 2 IGBT's?
Regards
Col.
I wonder why connecting this just to the grid without a panel popped the 2 IGBT's?
Probably blown/damaged FET drivers that resulted in the IGBTs shorting out the AC line when power was applied.
Thanks Sid, you mean the dc side drivers, even though there is nothing connected to the dc, do I understand that ok?
Ok a complete test and run through on this one, really driving me crazy.
Thanks a million
Col.
Hi SId,
I have done some investigating and this is really interesting. I dont know what happened to this inverter prior to me receiving this one. I have noted that the IGBT's that have blown Q8 and Q11 have a gate resistor of 1002, however the ones that appear ok Q9 and Q10 under diode test have a gate resistor of 1003? Looks like someone has had a play with this one and misread the value or something? What are your thoughts?
Look forward to hearing from you,
Cheers
Col.