RainSoft LQ7CT water softener Help

New user here! I used to work P/T for a local RainSoft dealer. Loved my job!! I was given a RainSoft LQ7CT system yesterday FREE!!!

I've cleaned her up a bit and she "appears" to work correctly...so far... I KNOW there is a key sequence to make the system advance the timer through the cycles manually! I just can't remember the key sequence! Does anyone have the factory repair guide or know the sequence to get it into service mode?? I would appreciate any help!