13
PROBLEM
POSSIBLE CAUSE
SOLUTION
Product flow
low
Membranes are fouled
Identify the foulant. Follow the
a p p r o p r i a t e c l e a n i n g
procedure.
Abnormal valve open degree
Check the status and open
degree valves
Flow instruments malfunction
Keep instruments calibrated
Feed water pressure low
Diagnose and solve the problem
Feed temperature low
Adjust feed water temperature/
Increase flow
Poor filtrate
quality
Instruments malfunction
Keep instruments calibrated.
C r o s s c h e c k v a l u e s w i t h
handheld devices or off line
laboratory equipment
Membrane Abrasion
Check pre filters, debris in pipes,
examine membrane feed side
Contact D&S retailer
Membrane aging, dying or
damage
Check power quality
Under Voltage
Solenoid valve
failure to
open//close
Over Voltage
Check power quality
Improper valve status
Open solenoid valve electrical
connection and correct
Feed pump not in service
Check for proper wiring and
operation of pump controller
System cannot
start in auto
status
Tank level low
Check tank level and level
transmitters
Summary of Contents for BUF 4
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