REVERSE OSMOSIS SYSTEMS RO 4... /E /EL - INSTRUCTIONS MANUAL
s.r.l.Milano - IT
ALY
Page 25 of 25
ro4e_
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8.
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ouble shooting guide
PROBLEM
CAUSE
HOW TO SOLVE
High conductivity of treated water
(permeate)
Too low pressure on membranes.
Leakage of untreated water through O-ring
seals of membranes.
The preservative or detergent solution has
not been removed completely.
Spoiled membranes
Increase the pressure by adjusting the valve(s) VS, VR, VRP.
Withdraw the membranes and check the integrity and the correct
placing of O-rings. Replace or place correctly them.
Rinse membranes with high flow rate of water.
Replace the membranes.
Low pressure treated water
(permeate).
Too low pressure on membranes.
Fouled membranes.
Spoiled membranes
Increase the pressure by adjusting the valve(s) VS, VR, VRP.
Wash the membranes.
Replace the membranes.
The pressure does not increase
Valve VS and/or VR and/or VRP are not
properly adjusted.
Flushing solenoid valve is dirty or spoiled
and does not close perfectly.
There is air inside the pump.
The pump is spoiled.
Adjust correctly valve VS and/or VR and/or VRP.
Clean or replace the solenoid valve.
Purge air off the pump.
Repair and/or replace the pump.
Minimum pressure alarm acts
because the inlet pressure
upstream of the pump is <0.8 bar
(80 kPa) *
Shut off valves of the filters are closed.
The pre-filters are clogged
Inlet water pressure is too low
The inlet solenoid valve is defected.
Open shut-off valves of the filters.
Clean or replace the filtering elements.
Check the available water.
Repair or replace the solenoid valve.
Minimum pressure alarm acts
although the inlet pressure
upstream of the pump is > 0.8 bar
(80 kPa) *
Pressure switch is defected.
The pressure switch is not properly adjusted.
Replace the pressure switch.
Adjust the pressure switch.
There is a passage of water when
the system is not working.
The inlet solenoid valve is dirty or spoiled
and does not close properly.
Repair or replace the solenoid valve
* CAUTION : pressure upstream of the pump must be checked when
the pump is working, since this is the operating condition when
the pressure
switch alarm acts.
