Environmental Water Systems RU Series - Manual (Page 31)

EWS, Inc. / Environmental Water Systems 4.2-31
www.EWSWATER.com office: 702-256-8182 (m-f; 8:30-4:30, pst) fax: 702-256-3744 [email protected]
Trouble Shooting Guide - Reverse Osmosis Systems
TDS “Creep” Tank has never been At night before bedtime, open dispenser, close other
completely emptied devices, then empty all the water from the tank. Allow
water to produce overnight. Open other devices after
tank is completely filled. Do this quarterly or as
needed.
Clogged prefilter(s) Replace filter(s)
Low water pressure Feed water pressure must be above 40 psi
Check incoming supply water at inlet
RO membrane is new New membrane has a preservative. Follow correct
start-up procedure and empty tank 2 times before
usage
RO membrane issues Remove and check membrane. Inspect 2 O-rings
Membrane o-rings, brine seal at insertion end,
check brine seal for proper seating into membrane
housing
RO membrane is expended If membrane life is unusually short, find and correct
the problem. Replace membrane.
Product water and drain water Correct tubing and plumbing connections
tubing or connections are crossed
No drain flow Clear or replace drain restrictor. Drain line is
clogged or restricted
Clear or replace air gap line or faucet
The RSR valve is not closing “TDS Creep” (see above) empty tank completely
and produce a new tank of water. Do this at least
4 or more times a year. Make sure pressure in
tank is between 5- 7 lbs.
Repair or replace RSR valve components
New in-line activated carbon post Flush with several full tanks of product water
filter or activated carbon cartridge
not rinsed completely
The feed water TDS has increased An increase in feed water TDS will give a
corresponding increase in product water TDS
Chlorine in feed water to membrane CTA membrane on 3 Stage unit is tolerant to
chlorine levels up to 2 ppm
TFC membrane on 4 & 5 Stage units are not
chlorine tolerant
Change or add precarbon filter to remove chlorine
Restricted brine flow Blocked brine line will foul membrane, decreasing
production and rejection rate. Check the drain line
for obstructions or restrictions blocking the flow
into the drain pipe and air gap (if applicable).
Low feedwater pressure over membrane Feedwater below 60 psi will produce lower quantity
and quality than the membrane specifications.
High TDS - total dissolved solids
Feedwater less than 35 psi should consider using
reducing feedwater pressure over a low pressure boost pump. Booster pump require-
membrane ment, inquire with web site or our offices
High feedwater pressure Feedwater above 65 psi should be regulated to
a maximum of 65 psi into the system
Problem - Water Quality Possible Causes Solution
High Total Dissolved
Solids (TDS) in the
Product Water
Low Quality Water
Taste, Odor
and/or
Tank fills too fast
Low Quality Water
Taste, Odor
and/or
Tank fills too fast