electrical connections are secure.
Use a voltmeter to verify that the
motor is getting sufficient power.
Refer to System Specifications
(Table 1 On page 6 or table 2 on
pages 7) for the power requirement
of your motor.
6. PRESSURE GAUGE:
Check for foreign matter on the
gauge fitting. Remove any visible
matter and replace the fitting. Verify
that the tube is not pushed too far
inside the fitting. This could restrict
flow and cause an inaccurate
display. If the fitting and tube are fine
and the pressure gauge is still
malfunctioning, the gauge should be
replaced.
7. CONCENTRATE CONTROL
VALVE:
The concentrate control valve may
have a tear in the diaphragm.
Remove the valve, inspect the
diaphragm, and replace if necessary.
8. MOTOR:
The motor may not be drawing the
correct current. Use a clamp-on
ammeter to check the current draw.
9. LEAKS:
Check the system for leaks, as this
can result in low pressure.
ABNORMAL PERMEATE FLOW:
Permeate flow should be within 15%
of the rated production, after
correcting for feed water
temperatures above or below 77° F
(see table 2). Check your permeate
flow meter to determine the
permeate flow rate. If the system
does not have a permeate flow
meter, measure the time it takes to fill
a one-gallon container then calculate
the permeate flow rate at gallons per
minute or gallons per day.
NOTE: To determine the
temperature correction factor, go to
page 38 and follow the directions.
Causes of Low Permeate Flow:
1) Cold Feed Water.
2) Low Operating Pressure.
3) Defective Membrane Brine
Seal.
4) Fouled or scaled membrane.
Causes of High Permeate Flow:
1) Defective product tube O-rings.
2) Defective or oxidized membrane.
Causes of Poor Permeate Quality:
1) Low operating pressure.
2) Defective product tube O-
rings.
3) Defective or oxidized
membrane
EPRO 150-8000 O&M MANUAL Rev.04/03 Page 36 of 55
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