Wanner Engineering STAN-COR, Installation And Operation Manual

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Wanner Engineering, Inc.
10
United States Instant Information: www.wannereng.com
(61) 33-5681 Fax (61) 33-6937 SCK-991-400B
Troubleshooting
Not Not Excess Short
Noise/ No Enough Enough Power Intermittent Bearing
Causes Vibration Flow Flow Pressure Required Flow Life
Pump not primed — x x — — — —
Speed to low — — x x — — —
Excessive discharge head — x x — — — —
Insufficient NPSH available x x x — — x —
Impeller clogged — x x — — x —
Wrong direction of rotation — — x x — — —
Plugged suction or discharge line x x x — — — —
Foot valve or suction line not
immersed enough — x x — — x —
Impeller damaged — x x x — — —
Shaft packing or seal defective — — x x — — —
Impeller diameter too small — — x x — — —
Impeller diameter too large — — — — x — x
Excessive amount of air or gas in liquid — — — x — x —
Speed too high — — — — x — x
Total head lower than design — — — — x — —
Specific gravity or viscosity too high — — x — x — x
Bent shaft x — — — x — x
Improper electric motor wiring or voltage — — — — x — —
Rotating elements bind x — — — x — x
Leaky suction line or shaft seal — x x — — x —
Misalignment x — — — x — x
Bearings worn x — — — — — x
Impeller out of balance x — — — — — —
Suction or discharge piping not anchored x — — — — — —
Improper foundation x — — — — — —
Insufficient discharge head (excessive flow) x — — x x x x
Improper lubricant or level — — — — — — x
Impeller clearance too large — — x x x — —