Tried to do it with the refill key, I powered machine up, waitied for it to go 'live' then opened bottom door. Inserted the key (above the red LED ?), turned it 180" then pressed the hopper dump switched, nothing happened. Tried pressing start button, nothing

How do you get into the test mode on this machine ? I've got a POT BLACK by barcrest and thats easy, there is a white switch at the back of the cabinet. Can't see anything on this that would allow me in, there is another switched inside which is a float top up ???
Sorry for being a complete newbie to this guys !!!! lol
