Trouble shooting guide - reverse osmosis systems, Ews, inc. / environmental water systems 4.2-30 – Environmental Water Systems RU Series User Manual

Page 30

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EWS, Inc. / Environmental Water Systems

4.2-30

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

Air in system
System start-up
Filter or membrane replacement
New installation, changing filters,
disinfecting the system
Open/close and open of water supply to
home or in home

Membrane seals

Hot or High feed water temperature

High feedwater TDS

RO Membrane replace

High feedwater temperature

Post filter elements

Pre- and Postfilters

Pre-Treatment needed

Filter/Membrane/UV housing issues
Storage tank water issue

Need to replace filters
System needs disinfecting
System was idle, stored or misused
for a long period of time.
System under unfavorable conditions or
changing water conditions

Hydrogen sulfide, iron, manganese is in
the household water supply, presence of
iron/sulfur bacteria
System misapplied

Problem - Water Quality

Possible Causes

Solution

Water Cloudy

Salty Taste or Whitish
Ice Cubes
TDS Test less than
75% Rejection

Low Quality Water
Taste, Odor
(also see next page)

Unpleasant taste and/
or odor
Metallic flavor
Discoloration

Rotten egg smell from
water

Air in the system is a normal occurrence with initial
start-up of the RO system. This milky or cloudy
look will disappear during normal use within 1-2
weeks. Condition can reoccur after any filter
change-out
Empty and fill tank 3 times to reduce air and fines
from system and/or filter replacement start-up

Membrane seals are breached, re-seat or replace
membrane
Water supplied to unit must be below 95°F

Feedwater TDS levels above 500 ppm can result in
lower quantity and quality product water. 1 psi loss
per every 100 ppm above 500 ppm.
Treat the same as low feedwater pressure. In-
crease water line pressure or may need booster
pump for system

Membrane replacement should occur when rejec-
tion rate has dropped below 70%

Feedwater temperatures above 95°F can produce
problems, cool water or find another supply

New post filter elements can release small air
bubbles and small fines which show as additional
TDS in the product water. Follow proper start-up
instructions

Pre- and Post filters require replacement

Feedwater pretreatment may be necessary for
water supplies with high levels of iron, hydrogen
sulfide, water hardness, etc. which may be exceed-
ing system tolerance parameters

Disinfect and inspect housings
Empty tank, sanitize, empty, flush and refill

Replace filters and follow start up procedures
Follow disinfection procedure
Flush system by running water, replace filters and/
or disinfect
Determine what changed in your water supply and
Flush, Replace and/or Disinfect, or change type of
water treatment system based on local water
conditions. Call your municipality or have your well
tested.

Hydrogen sulfide, iron and manganese must be
removed from household water supply before filter
system.
Visit our web site for other systems.

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