The manuel does not cover how to turn off the inspect cell light. Since the generator was not producing chlorine I had no other choice but to call the pool company for service. I got lucky this time. The pool guy walked me through it over the phone. After I answered several questions pertaining to the salt levels, ph levels, and cell condition ensuring there was no other reason for the inspect light to come on, he simply said to hold in the display button until the inspect cell light tuned off. He said this will occur approximately evey 500 hours for cell quality assurance.