How to fix my shower Triton T300si which is short circuting?

Hi,

We seem to have the issue with a short cirtuit in the remote power pack. One of its components overheats and triggers the circuit breaker.
What will we need to do to fix it
Here are some pictures of the shower (model Triton T300si) and of the remote power pack.
Thanks

lilpoppette
March 2012