LP3-500 Owner’s Manual | 19
REO-PURE LP3-500 SYSTEM TROUBLESHOOTING
PROBLEM
POSSIBLE CAUSE
SOLUTION
RO SYSTEM
WILL NOT
START
No electrical power
Check power supply
Storage tank full
Drain portion of water out of tank
Low feed water pressure
Must be minimum of 35 psi
Pump/motor malfunction
Check, replace if necessary
Pressure or float switch defective
Check, replace if necessary
LOW FEED
PRESSURE
Feed water valve OFF
Check, open feed water shut-off valve
Low inlet water pressure
Check, install booster pump if necessary
Filters clogged
Check pressure on inlet and outlet filter pressure
gauges
Obstructed feed line
Check inlet tubing
Inadequate upstream pretreatment
Check if sized correctly or fouled
LOW
OPERATING
PRESSURE
Pressure regulator needs adjustment
Check and adjust if necessary.
Operating pressure gauge broken
Check, replace if necessary
Pump impellers worn
Check, replace if necessary
Pump/motor coupling broken
Check, replace if necessary
Low water volume to pump
Check, install booster pump if necessary
Malfunctioning pump
Check, replace if necessary
Membrane element brine seal is folded or not
sealed against housing wall
Check brine seal, use care when reinstalling the
membrane into the vessel
Inlet solenoid valve not opening
Clean solenoid valve or replace
Membrane element fouled
Check, clean or replace
Manual flush valve open
Close manual flush valve
THE PUMP
DOES
NOT RUN
Pump is bound
Manually check pump rotation, replace if necessary.
Pump/Motor coupling damaged
Remove pump from motor. Check, replace if
necessary.
LOW OR NO
REJECT
WATER /
HIGH PUMP
PRESSURE
Restricted orifice
Check and clean
Clogged drain line
Check and clean
Membrane element clogged or fouled
Check, clean or replace
LOW OR NO
PRODUCT
WATER
Operating pressure low
Check and adjust
Membrane element clogged or fouled
Check, clean or replace
Water temperature too low
Check, consult dealer if necessary
Product check valve damaged
Check, replace if necessary
Tank over - pressurized
Check tank air pressure. Relieve to 10 PSI if
necessary
Membrane element installed backward or brine
seal damaged/rolled
Check, use care when reinstalling the element into the
housing.
(system troubleshooting continued on next page)
