Heyup folks. Felt just a wee bit awkward when I read this thread and realised that I was the seller!! All I can say is that it worked when it was sold. Being ex-military I wouldn't sell anything that wasn't working properly without stating that. Even if it wasn't working and I wanted to con someone I definitely wouldn't have done it on this forum!
If it comes to having to do that to make £200 quids business has gone a bit crap hasn't it? It does struggle to do 22mm but I found what helped was to place towels round the freeze heads and then it got there pretty quickly. It's certainly not the best pipe freezer on the market but I am sure any buyer would have read the forum posts on here about it prior to making their decision. It does also need topped up with water and bled of air to run properly, an issue with this freezer I believe and one well documented on this forum.
Rothenberger states that the freezer must be used monthly otherwise seals etc will dry out. Obviously I have no idea whether or not this has happened in the 8 months since I sold it. I can only really comment on what was done with it when I owned it. I would hope that a refrigeration engineer would be able to get it working again properly.
We sold this unit as we wanted a freezer that would do 28mm and larger pipework and didn't need two freezers.
smtplumbing, like I PM'd, I am genuinely sorry for the predicament you are in but I don't think there's much I can do this long after selling it.