We have had a ceiling fan in the bedroom for a lot of years, as a result of holidaying in Croatia where we found the fan did cool the room... please don't ask how as it makes b****r all sense to me. On our return home we purchased and fitted a B&Q fan (not one of their cheapies - Mrs Sunray didn't like the look of them) with R/C but retained the wall switch.
That said the unit I have is wired thus and as that light didn't have a perm L it's always been wired to SL: We have found that the unit remembers the last setting of the R/C so in winter the switch simply operates light (it does take longenough to come on that one may think nothing is happening ~2-3 seconds) and summer tends to be low speed fan.
View attachment 276848
A friend moved house a number of years back and the conservatory light/fan didn't work. She swore blind it was running when they viewed but the estate agents pictures showed a different lampshade. The fan didn't have a single spec of dust and there was a substantial box of manuals for fitted products and sitting right on top was the new manaul.
MI stated the brown and blue wires of the fitting had to be connected to the brown and blue supply. And it had been wired thus:
View attachment 276849It didn't take more than a second to see the brown/blue cable went to the switch and the red/black went to the FCU beside a DSSO.
Final wiring :
View attachment 276852
Switch operates light and R/C operates fan. I've done several like it and sadly at least one was after an electricians actual reply was: "Comtuper says no." mimicking Little Britain.
One caused some head scratching as the lamp was 12V LED and I had to provide a transformer for that.
So getting back to the original question the answer is 'maybe', It's been possible with all of the units I've tried however I've also heard comments that it can't be done, knowing how some kit is constructed I have to accept 'no' may be the right answer.