ITT Goulds Pumps HSUL, Installation, Operation And Maintenance Manual

Page: 25 / 26

6 Troubleshooting
6.1 Troubleshooting
Symptom Cause Remedy
Insufficient or no dis-
charge Speed too low due to low voltage Verify voltage is within rated range
System head too high Verify discharge pressure
Insufficient NPSH or submergence Verify liquid level is above minimum required
Worn pump parts Check parts for wear
Incorrect motor rotation Verify rotation and swapped 2 of 3 motor leads if
necessary
Incomplete pump priming due to plug-
ged vent hole Check vent hole
Clogged suction or discharge pipe Clean suction area and check discharge piping for
clogs
High fluid viscosity Check for solids settling that has increased viscosi-
ty.
Excessive current
draw Low system head allowing pump to op-
erate at higher flow than expected Check discharge pressure. If lower than expected,
increase with discharge valve if available
Impeller rubbing or solid stuck in pump Check that impeller turns freely. Disconnect and
lockout power. Heed all safety precautions and
warnings in this manual
Mechanical defect in motor Repair motor at ABB/Baldor/Reliance Authorized
repair center
Specific gravity or viscosity too high Check for solids settling that has increased viscosi-
ty.
Low voltage Verify voltage is within rated range
6 Troubleshooting
HSUL Installation, Operation, and Maintenance Manual 23