Sea Recovery SRC Aqua Matic 1400-2, Owner'S Manual, Page: 121 / 223

6. Problem: Leaks between Pump and Motor
a. Description: The High Pressure Pump leaks water between the pump and motor. The HP Pump has a
ceramic and carbon seal. Ceramic and carbon seals will weep if the pump is not operated for extended
periods of time. When used regularly the seal will give approximately 8,000 hours of use. The seal continually
wears during use and must be replaced approximately every 8,000 hours or at the sign of leakage.
b. Solution: Return the High Pressure Pump to Sea Recovery for service and Seal replacement.
7. Problem: Knocking Noise
a. Description: The High Pressure Pump makes an unusual and loud “knocking” noise. All positive displacement
pumps will make a very loud knocking noise if they do not receive sufficient flow at a positive pressure. This
knocking noise results from cavitation which is caused by insufficient feed water flow at an insufficient
pressure.
b. Solution: Service the Pre filtration Section (Low Pressure Section) of the System. Check all components
between the Inlet Thru-Hull Fitting and the Inlet of the High Pressure Pump to determine what is causing
the loss in feed water flow and pressure to the High Pressure Pump.
HP Pump Assembly
1. Problem: Pulsations at low and high pressure gauges.
a. Description: Worn or broken valve, valve spring, valve seat. Debris in valve chamber.
b. Solution: Check valve chamber for debris, inspect valve seat. Replace valve assembly as necessary.
2. Problem: Water leaks between the pump manifold and rear crankcase section.
a. Description: Worn seals or seals damaged due to running dry.
b. Solution: Inspect seals and replace if necessary.
3. Problem: Normal flow when not pressurized but flow drops dramatically when pressurized.
a. Possible cause: Worn seals or seals damage due to running dry, broken valve, valve spring, or debris in
valve chamber.
b. Solution: Check seals and valve chambers, clean chamber or replace parts as necessary.
RO Membrane and Assembly
Is your System experiencing one or more of the following issues?
• The System does not produce the correct amount of Product Water (too much or too little)
• The System produces poor quality Product Water, high in salinity
• The System Operating Pressure is excessively higher than 800 PSI (55 BAR) when operating in normal Sea
Water at moderate temperatures (77°F or 25°C)
• The System Operating Pressure is excessively lower than 800 PSI (55 BAR) when operating in normal Sea Water
at moderate temperatures (77°F or 25°C)
If yes, then first check that the RO Membrane Element has been properly set up.
1. Problem: Product Water Flow suddenly and dramatically increases and Product Water Salinity increases
making the Product Water non-potable.
a. Descriptions:
a. The Pressurized Feed Water and the un-pressurized Product Water are separated by an O-Ring which
seals on the Product Water Tube at each end of the RO Membrane Element and the End Plug at each
end of the Pressure Vessel. Should this O-Ring fail, Feed Water will mix with Product Water. If this
happens, the Product Water will be very salty, the Product Water Flow will increase dramatically, and
the Brine Flow will decrease appropriately (by the increase in Product Water).
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Troubleshooting