43
T
ROUBLESHOOTING
Problem (cont.)
Possible Causes (cont.)
Action (cont.)
Tank not filling (low pressure indicated by
Feedwater supply valve closed.
Open feedwater supply valve.
gauge.)
RO prefilter plugged.
Replace RO prefilter.
Solenoid valve not open.
Call Technical Service.
Feed pressure below specification.
Increase pressure.
Low RO purity LED illuminated.
New RO membrane rinsing up.
Continue rinse-up.
Improperly installed RO membrane.
Be sure RO membrane is installed
properly.
Decrease in % rejection.
Fouled RO membrane.
Replace RO membrane.
Decrease in system productivity.
Decrease in water temperature.
If decline in flowrate is unacceptable,
install feedwater temperature valve
to elevate water temperature. Valve
available by calling customer service.
RO membrane fouled.
Replace RO membrane.
Low incoming water pressure.
Be sure prefilter is not blocked.
Increase incoming water pressure.
Low RO membrane operating
Increase operating pressure. If
pressure.
needed, use Barnstead accessory
AY1332X1 external pressure boost
assembly.
RO prefilter plugs rapidly.
High turbidity feedwater.
Call Technical Service. If needed, use
Barnstead accessory AY1332X2
External Filter Assembly with gauges.
This contains high volume 5 micron
particulate filtering in conjunction
with membrane antiscalant.