f73a157e_ion_and_Trouble_Shooting_Guide__PROBLEM
[CAUSE] - Bad membrane. - Filters have expired. - Little water use. - System needs sanitizing. [SOLUTION] - Test membrane with a TDS tester meter. Replace RO membrane when below 75% rejection and sanitize. - Replace water filters. Should be replaced every 6 to 12 months. - Drain entire tank. Should be done once every week to keep stored water fresh. - Sanitize (see Sanitizing Instructions) and replace filters. [PROBLEM] 
Water does not taste or smell right.
Water Filter and Reverse Osmosis Installation and Trouble Shooting Guide
PROBLEM