Horizon Reverse Osmosis Seafari Versatile SFC-1400-2, Owner'S Manual

Page: 81 / 162

HRO
Systems
Horizon
Seafari
“Section I” System Troubleshooting Guide
G. HIGH PRESSURE PUMP:
The high-pressure pump is a positive displacement triplex plunger
pump. The pump always delivers the normal amount of water flow unless a problem develops within the
pump, the pump is being subjected to an extreme vacuum at its inlet, or the RPM from the Electric Motor has
changed due to low or high Cycles from the Power Source.
High Pressure Pump flow is normal when the system operating pressure is at zero, but the flow drops
below normal as pressure is applied: Keep in mind that the Brine Discharge Flow Meter registers
full feed water flow when there is no pressure applied to the system and as pressure is applied to the
system the Brine Discharge Flow Meter drops in relationship to the amount of product water that is
then being produced. Therefore, as pressure is applied to the system this Brine Discharge Flow
Meter drops in predictable flow registration by design. That would not indicate a problem.
However, if flow drops beyond the normal decrease then:
Worn High Pressure Pump seals are allowing internal bypassing and require replacement.
Worn High Pressure Pump valves, valve seats, valve springs and or valve seat "O" rings are
allowing internal by-passing and require replacement.
Worn, corroded or eroded manifold is allowing internal by-passing and requires replacement.
There is debris in the valve chamber(s) causing one or more valve to remain open.
The Electric Motor RPM is low due to improper Cycles from the Power Source to the System.
High Pressure Pump flow is normal (at the Brine Discharge Flow Meter) when the system operating
pressure is at zero, but the flow becomes erratic and pulsating as pressure to the system is applied:
Worn or broken High Pressure Pump Discharge Valves, Discharge Valve seats, Discharge Valve
springs and or debris is trapped within a High Pressure Pump Discharge Valve chamber.
High Pressure Pump flow is erratic and worsens with increased system pressure:
Worn or broken High Pressure Pump Inlet Valves, Inlet Valve seats, Inlet Valve springs and or
debris is trapped within a High Pressure Pump Inlet Valve chamber.
High Pressure Pump flow is normal when the system operating pressure is at zero, but the High
Pressure Gauge does not register pressure as the the Back Pressure Regulator Valve is adjusted. The
Feed Water Flow Meter reads normal and normal Product Water Flow registers on the Product
Water Flow Meter as the Back Pressure Regulator Valve is adjusted clockwise:
Clean the debris from the High Pressure Gauge orifice or replace the gauge.
High Pressure Pump leaks oil:
Locate the leak source and repair as required.
High-pressure pump leaks water from between the manifold and the crankcase housing:
Worn inlet packings due to operating the High Pressure Pump dry or at a vacuum.
Worn seals from normal wear, or degraded from age.
Page I - 7