ITT Goulds Pumps 3500XD, Инструкции по установке, эксплуатации и обслуживанию

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Problem Symptoms Possible cause Solutions
Power consumption and air
removal vacuum unstable Stock in the standpipe has
large voids, or the
consistency is too high Make sure that stock deliv-
ered to the standpipe is well
shredded. Dilute if necessa-
ry by adding dilution at the
shredder screw and to the
upper part of standpipe.
The signal to the level con-
trol valve is unstable Check the valve movement,
delay the input from the level
transmitter if necessary
Level measurement is too
sensitive Add filtering, or delay the in-
put to the LIC
Motor overloaded
Flow unstable
Motor overloaded Volume flow above normal Consistency is too low,
switch to manual control
Power consumption normal Flow transmitter is too sensi-
tive Increase transmitter re-
sponse time
Power consumption normal
but changes with the level
control valve opening Control not working properly Recalibrate or adjust control-
ler
5.7 Monitoring during operation
3500XD Installation, Operation and Maintenance Instructions 33