Xylem IM007 R05 Models 3642/3742 - Manual (Page 8)

8
TROUBLESHOOTING
FAILURE TO DISCONNECT AND LOCKOUT ELECTRICAL
POWER BEFORE ATTEMPTING ANY MAINTENANCE
CAN CAUSE SHOCK, BURNS OR DEATH.
SYMPTOM:
Motor Not Running
See Probable Cause – 1 through 5
Little or No Liquid Delivered
See Probable Cause – 6 through 13
Excessive Power Consumption
See Probable Causes – 3, 13, 14, 15
Excessive Noise and Vibration
See Probable Causes – 3, 6, 7, 10, 12, 14, 16, 17
PROBABLE CAUSES:
1. Motor thermal protector tripped
2. Open circuit breaker or blown fuse
3. Impeller binding
4. Motor improperly wired
5. Defective motor
6. Pump is not primed, air or gases in pumpage
7. Discharge, suction plugged or valve closed
8. Incorrect rotation (3 phase only)
9. Low voltage or phase loss
10. Impeller worn or plugged
11. System head too high
12. NPSH
A
too low – Excessive suction lift or losses
13. Incorrect impeller diameter
14. Discharge head too low – excessive flow rate
15. Fluid viscosity, specific gravity too high
16. Worn bearing
17. Pump, motor or piping loose
WARNING
Hazardous voltage
can shock, burn or
cause death.