Installed Pool Pilot SCG, DIG-220 one year ago at the very end of the summer. The original tri-sensor had to be replaced. This summer at atart-up we still recieve the flashing check system light, purifier off, check flow. We have acid washed the super cell, cleaned the strainer. Right now the salt level is accurate as is the temperature and definetly have flow. I can see the bypass valve and does not appear to be open. I am afraid if I suggest we take it apart at this point divorce will happen as my husband is at his wits end. I welcome suggestions and apologize if this is a repear question.