88 means you are filtering alone no chlorine
Once the generator is set it will run its time like 1-12 hours depending on what you set it at
After this time it will flash 93 meaning it is getting ready for sleep mode eventually it will shut that down and then turn back on at the same time you programed it the time before

There are 2 green lights
top one is that you are filtering
second one comes on about 2-10 minutes after you set the generator time this shows you are producing salt