When you dump salt in it takes several days for it to register on the system. It won't happen in hours... in the meantime... you should keep using bleach until it detects enough salt, and the display shows the correct salt, and it starts generating chlorine. Until the unit detects the correct amount of salt, it won't operate. Just be patient... many of us have oversalted our pools thinking the mineral reading was accurate, only to later discover our numbers were higher than we thought. I would give it a few days until I decided something is wrong, but in the meantime you have to add chlorine in another format.