Xylem NPOPTM NPO Product Training Manual - Manual (Page 26)

PAGE 26
Commercial Water
Goulds Water Technology
PROBLEM SEE CAUSES
Motor Not Running 1 — 6
Little or No Liquid Delivered 7 — 17
Power Consumption Too High 4, 17, 18, 19, 22
Excessive Noise / Vibration 4, 6, 9, 13, 15, 16, 18, 20 — 22
CAUSES
1. Tripped thermal protector
2. Open circuit breaker
3. Blown fuse
4. Rotating parts binding
5. Motor wired improperly
6. Defective motor
7. Not primed
8. Discharge plugged or valve closed
9. Incorrect rotation
10. Foot valve too small, suction not submerged, inlet screen plugged.
11. Low voltage
12. Phase loss (three-phase only)
13. Air or gases in liquid
14. System head too high
15. NPSHA too low: Suction lift too high or suction losses excessive. Check with vacuum gauge.
16. Impeller worn
17. Incorrect impeller diameter
18. head too low causing excessive flow rate
19. Viscosity or specific gravity too high
20. Worn bearings
21. Pump piping loose
22. Pump and motor misaligned
TROUBLESHOOTING