SECTION IV. UNIT TROUBLESHOOTING
2-10. Troubleshooting. Both a symptom index and a troubleshooting table are provided. The symptom index will
help you locate the information you need for troubleshooting.
LIQUID NOT BEING PUMPED AND DELIVERED
NOT ENOUGH PRESSURE
PUMP OPERATES FOR SHORT TIME THEN STOPS
PUMP DRAWS TOO MUCH AMPERAGE
PUMP NOISY OR VIBRATES
Table 2-2 lists the common fault conditions that may be found during operation or maintenance of the equipment. Look
for causes and do corrective actions in the order listed. This manual cannot list every symptom that may show up, and it
cannot list all the possible-causes and corrective actions. If a symptom is not listed, or if it keeps up after you have
performed the corrective actions, notify your supervisor.
Table 2-2. Troubleshooting
Test or Inspection
Liquid not being pumped.
Check for loss of prime.
Fill pump and suction pipe completely with liquid.
Correct leaks in suction pipe joints and fittings.
Vent casing to remove accumulated air.
Check to see if suction lift is too high.
Remove obstructions from inlet (Item 3, PMCS).
Check to see if discharge head too high.
Open valves in discharge piping.
Check for low motor speed.
Make sure motor is directly across-the-line and receiving full voltage
Check to see if motor is rotating in the right direction.
Inspect wiring for proper connections.