Changing Filtration Cycle On A Gatsby Hot Tub

[tomasaur]

I bought a used Gatsby tub a little while ago. It seems that the filter cycle is always on, as there's always a pump running (not a big jet pump, it's the same one that runs water through the heater). I found a users manual online http://jacuzzichino.com/manuals/Gatsby.pdf and it appears that you should be able to change the filtration cycle by pressing the light button for 5 sec and then scrolling through options that appear on the lcd screen. This doesn't work on my tub, pressing any button for 5 seconds or more has the same effect as a momentary push.