My unit had a solid red pwr LED and i suspected something is wrong with it. My pool chlorine level was low and pool was becoming green on sides and every time i would open the DE filter the grids were full of algae.
So i took a sample of the water to Leslie, and they told me i have 0 chlorine. The unit had all LEDs green except the power that was red. When i first called Pentair, the rep told me there is no problem if the CELL led is green.
This time, i called the Pentair, and a nice lady asked me for the chemistry of the water and told me that they would sent a tech to check. 2 days after and service company came in and swapped the unit , no question asked with a new unit. Now ALL leds are green. I had to add 200 lbs of salt and Leslie and the service company found my salt to be at 2000ppm while the old faulty IC-40 was claiming Salt was good.
I had the cell for 2.5 years.
Two thumbs up for Pentair, i will sure recommend them to everyone i know and buy my next cell from them.
40x20 30,000 gal plaster pool, 11 Fafco solar panels with Goldline 35 control, IC-40 salt gen, pentair 60sqft DE filter 1.5 HP pump.