f73a157e_ion_and_Trouble_Shooting_Guide__PROBLEM
[CAUSE] - Prefilters are partially plugged. Lowered water pressure prevents the hydraulic shut off valve from actuating. - Auto-shut off valve not working. - Low incoming water pressure. - Low tank air pressure. - Tank bladder is ruptured. Is the tank heavy after draining out all water? - Flow restrictor worn out. - Membrane is bad (fouled). [SOLUTION] - Replace prefilters. To check if if it is the prefilters you can remove them and operate the system without them until it shuts off. This will confirm that the filters are the problem. - Replace auto shut off valve. - Increase incoming water pressure to 40 PSI or better. This may take a pump. - Check tank pressure with specially calibrated air pressure gauge. Fill to 7 PSI. - Replace the tank. - Replace the flow restrictor. - Use TDS tester meter to check membrane. Replace membrane. [PROBLEM] 
System is continually running.
Water Filter and Reverse Osmosis Installation and Trouble Shooting Guide
PROBLEM