Tesla SDU repair. Over temp

[Kitlacey]

Hi,

I have several Tesla small rear drive units with over temp damage to the inverters. They all had inadequate cooling so something in the inverter has melted each time.

In the past, I have simply bought a new SDU from eBay and swapped everything over, but I’d like to see if it’s possible to repair them and save me some time and money.

Does anyone offer a repair service? Or could support me with it?

Symptoms are hard to describe. They all failed whilst driving so you can switch them on and put them into run mode, but as soon as you select a gear they switch off again.

[PoloLbricolo]

Hi,
Most likely one on the igbt is dead, that's why the inverter shuts off. The SDU inverter is really hard to repair, and usually it'smore economical to get a front drive unit and take the inverter.

[johu]

I've only seen one attempt so far, not sure if it was ever repaired: viewtopic.php?t=2345

[Kitlacey]

Hi,
Most likely one on the igbt is dead, that's why the inverter shuts off. The SDU inverter is really hard to repair, and usually it'smore economical to get a front drive unit and take the inverter.

Do they share the same inverter? I didn't know that. So maybe I could buys a model x/s front drive unit, take the inverter off, swap the boards and then put it on the broken SDU I have? Looking on ebay and front units are cheaper but they don't look the same to me...

https://www.ebay.co.uk/itm/145713204866 ... R66UwMj9Yw

[PoloLbricolo]

Yes same inverters, the phase wires are about 40mm shorter on the Front drive unit, so you'll need to make some little busbars to be able to connect the phase wire to the motor.

[Kitlacey]

Yes same inverters, the phase wires are about 40mm shorter on the Front drive unit, so you'll need to make some little busbars to be able to connect the phase wire to the motor.

Wow, ok, that's convenient. And the fixings and bolt holes are all the same? So the casing can just swap too?

What do you think of the link I sent, is that the right kind of thing?

[PoloLbricolo]

Yes, they are exactly the same casing, bolt holes and everything. As far as i know the powerstage is the same. Just swap your logicboard and make the busbars.
Yes your link to an FDU is what you would need.