I have the same problem. Water is coming out from the overflow pipe and it just stopped working suddenly. However, I have an Aquatronic W9500 and was wondering if it might be the same problem as the one with the Triton. If so, can someone tell me the name of the replacement part so I can phone the company that makes my shower and get it replaced.
If water comes out of the overflow pipe, the part is called PRD (pressure relief device) but you need to find out why it has gone as the new one might do the same.