Quote Originally Posted by Web Goblin View Post
Bit of an update on this. I have the driver apart on my bench and have found the cooling fan faulty and a shorted IGBT.
If there are any protection diodes on the output, check these as they often go with the IGBTs.

Quote Originally Posted by Web Goblin View Post
The fan is easy but waiting for someone to see if they can get me a replacement IGBT.
What's the part number? I might have something.