Oh and your post count is nearly as high as mine btw!

Eventually got the A/C sorted. Would you believe there are two fans, one to cool and exhaust the heat and one to blow into the caravan. I had the cables fitted to the repaired PCB the wrong way round!
I didn't realise because the plugs and cable colours are the same so when checking against the image I took, nothing looked wrong. Now I've swapped them over the A/C works as it should. Yay!
I did manage to sell the new PCB on the Bay of e after a couple of months for what I paid for it less their costs. Not bad in the end. Sometimes my need to do it myself isn't cheaper/better but stuff is experienced so there is some value. Having had no income for the last 6 months forced my hand somewhat. Alls well that ends well I suppose.
I've just returned from 5 weeks of touring Dorset, Devon and then up to my Daughters to look at our Grandson from a distance and the A/C worked well during the hot spell.
What didn't was a leak from the roof vent above me in bed at 2:00am. Again the cost to get this sorted by Vanmaster is nil but about £350 for fuel and overnight/meal, it is way over the £10 of sealant (Sika flex) to do it myself. So another job done by me and done at a very reasonable cost comparatively.

Well the cooling of the A/C has dropped off to almost ambient levels so not much going on. Compressor is kicking in but cooling is just about there. So having looked into fitting valves and refilling with refrigerant at some silly costs and no guarantee of working, I've decided to take the plunge and replace the whole thing with a Truma Aventa comfort system. It won't be for some time as Covid has seen us with no income since February!
No money also means no foreign holidays too so I won't need it for a while.
Just bringing some closure to the thread is all.