XW6048 Diagnosing, loud Humming and drawing 15 amp idle

[doing it different]

If this thread is in the wrong section please move it

So I bought a this unit. And its turning out to be a bit of a mistake.
This is turning into inverter school for me.

Originally it was used in a greenhouse, and after that it sat for at least 2 may 3 years.
Hooked it up to a battery. Fires up but hums like crazy and draws around 15 amps.
Open it up and find on the mofet board
Multiple surface mount capacitors free or almost free.
Problem is I think a mouse got in and peed on the that area...
So. I mounted new capacitors on it.
But seems to have the same draw and hum.
I have 240v/120v on the output.
So I got my scope out and am probing the transformer input.
Don't think it looks correct, wondering if anyone has more insight, and can direct me.
@Warpspeed

 

[Philip53]

If you have not already, clean all that mess off of the circuit board. Toothbrush works really good.

 

[BKY2003]

If the other does not work maybe upload the firmware https://solar.se.com/us/en/product/conext-xw-120-240-60hz/

 

[doing it different]

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[doing it different]

If you have not already, clean all that mess off of the circuit board. Toothbrush works really good.

Yeah it's been cleaned quite well. Though a toothbrush would have been a good idea.

If the other does not work maybe upload the firmware https://solar.se.com/us/en/product/conext-xw-120-240-60hz/

Was a working system so I don't think that's the problem right now.
I suspect the switching is not correct. Does one half wave look right.
Because it seems one side is not switching on the half that had bad caps.

 

[doing it different]

So when I disconnect the transformer this is the waveform I get for a second or so, before trips out low voltage on the ac side.

 

[Backyard]

You probably have a blown mosfet for the transformer primary feed

 

[hwy17]

You checked the transformer wiring terminal configuration? X1/X2/X3/X4

The green tape on those wires is suspicious, unless you did that.

 

[doing it different]

You checked the transformer wiring terminal configuration? X1/X2/X3/X4

The green tape on those wires is suspicious, unless you did that.

Yes that is correct. I had marked those wires. With the green tape.

So I did some probing with the scope last night. And in my mine something doesn't make sense.
On the output of the board to the primary coil with it disconnected,
I get the waveform as shown above across the outputs.

But if I probe from B+ or B-
One output gives me the same wave. The other output has nothing...

I'll have to get pictures later.

 

[Quattrohead]

One side of the driver circuit has failed.

 

[doing it different]

Yes I assumed it was the side with bad caps that I repaired. But it seems like it the other side that's dead.
And it is in way better shape, no corrosion or anything...

No chance anyone has a schematic drawing of the
Driver circuit?