My Aquapure that is installed with my Aqualink PDA system seems to be saying service with code 123. That seems to say check the DC voltage or clean the cell or the cell is dead. I'm not sure how to check for voltage and it seems to pop the service light intermittantly, is there anyway to check the voltage? I did take the cell out and it seemed clean as can be, I could easily see through it, not sure if that means its worn out. I washed it with a garden hose and put it back on. I checked this morning and this evening and it doesn't seem like its producing any chlorine, not sure if there is any other way to test it besides a test kit in the water. Its the big aquapure 1400 model. I've been running it 5 hours a day at 95%. Its a small pool, I"d guess maybe 10K gallons top, probably less.