I just bought a 48"x18' Intex pool and SWG used one year. Put away very tidy (with talcum on pool, etc.).
I filled pool and salted the water, added the cy-acid to correct amount. I started main pump then SWG. Got 90 code at first til I sorted out bubbles in SWG. Then "02" appeared and the green "working" light. The "02" is hours of working, right? If I press any of the buttons I just get a beep or two each time but the numbers won't change. The beeps seem a little sporadic rather than precise for each press. Pressing the boost button does NOT light up the boost-light. After 2 hours the SWG seems to go into rest mode. I wonder if it's really working. My pool water is a bit yellow-green. Quite opaque. ...Not so good. I used a copper test strip from an unopened pouch. No color change. Started peach, ended peach. I see the pouch is dated "expire 2013." Do they really go bad? They're sealed in a pouch inside another sealed pouch.
I'm assuming the SWG is "somewhat" broken. The "boost" just does 4 consecutive cycles of 2 hrs, right? So I've just been going out and turning the SWG on and off and getting a 'fresh' 02 code. To try to keep the SWG in working mode. It's been a couple days of this. No improvement in pool water color.