Marelli Clima Water Chiller

Hi Guys

Do any of you out there have any information on a Marelli Clima CAF 119 Air Cooled Water Chiller. I believe they have been bought out by Denso, but not sure on this fact. The chiller was manufactured in 1992.
I have been asked to have a look at one as it has problems, a quick visit to site last week to view this, as usual no wiring diagrams available and nothing on the controller, although it is simailar to the Climavenetta CV1000 controller so I have managed to get into it.

I had one of there chillers which had the controller passworded, I rang them in Italy to try and obtain the password. No help whatsoever from them!