ITT GOULDS PUMPS JCU, Инструкция по установке, эксплуатации и обслуживанию

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6 Troubleshooting
6.1 Troubleshooting
Symptom Cause Remedy
Insufficient or no dis-
charge Speed too low (usually due to low volt-
age) Verify proper voltage
System head too high Verify discharge pressure
Insufficient NPSH or submergence Verify liquid level is above minimum required
Wear of pump parts Review pump parts for wear
Wrong direction of rotation Verify rotation, or swap two of the three electrical
leads
Pump not completely primed (plugged
vent hole) Check vent hole
Suction opening or discharge pipe
clogged Clean suction area, and check discharge piping for
clogs
Viscosity of slurry too high Check for solids settling that increases viscosity
Excessive current
draw Pump operating at a high horsepower
area of the pump curve (capacity is
greater than the design capacity) Increase discharge pressure by partially closing
discharge valve
Impeller rubbing or mechanical defect
in the motor Check impeller clearance as previously described
in these instructions
Specific gravity or viscosity too high Check for solids settling that increases viscosity
Low voltage Verify proper voltage
6 Troubleshooting
JCU Installation, Operation, and Maintenance Manual 23