Press and hold down the light key for 5 seconds to access the spa's programming mode.
There are three parameters used to control the total time your spa spends filtering its water:
Filter Start (FS) - the time of day at which the first filter cycle begins
Filter Duration (FD) - the length of time each filter cycle runs
Filter Frequency (FF) - how many filter cycles are run per day
For example, if you set FS to 6:00 AM, FD to 2, and the FF to 2, your spa filters the water a total of 4 hours per day. These settings filter for 2 hours at 6:00-8:00 AM and for 2 hours at 6:00-8:00 PM.