Goulds Pumps VIC - IOM - Manual (Page 60)

Troubleshooting
Operation troubleshooting
Symptom Cause Remedy
Pump does not start. The electrical circuit is open or not
complete.
Check the circuit and make any necessary
corrections.
The impellers are binding against the bowls. Reset the impeller adjustment. See Installation
for details.
The electric driver is not receiving enough
voltage.
Make sure that the driver is wired correctly and
receiving full voltage.
The motor is defective. Consult an ITT representative.
The pump is not delivering liquid. The bowl assembly is not submerged
enough.
Adjust the liquid level in the sump as
necessary.
The suction strainer is clogged. Remove the obstructions.
There is an obstruction in the liquid
passage.
Pull the pump and inspect the impeller and
bowl.
The discharge head is not properly vented. Open the vent.
The pump is not delivering enough
liquid.
The suction or discharge valves are closed. Open the valves. For more information, see
Commissioning, Operation, Startup, and
Shutdown.
The pump is not producing the
rated flow or head.
The impellers are not rotating fast enough. Make sure that the driver is wired correctly and
receiving full voltage.
The impellers are rotating the wrong
direction.
Make sure the impellers are spinning
counterclockwise when viewed from above.
Check the engagement of the motor coupling.
The total pump head is too high. Check the pipe friction losses. Use larger
discharge piping.
The liquid passages are partially obstructed. Inspect the impellers and bowls and remove
any obstructions.
There is cavitation. Insufficient NPSH is available.
The impellers are too high (semi-open
construction only).
Reset the impeller adjustment. See Installation
for details.
There is not enough pressure. The impellers are not rotating fast enough. Make sure that the turbine is receiving full
steam pressure.
The liquid passage is obstructed. Inspect the impellers and bowls and remove
any obstructions.
The impellers are rotating in the wrong
direction.
Make sure the impellers are spinning
counterclockwise when viewed from above.
Check the engagement of the motor coupling.
The impellers are too high (semi-open
construction only).
Reset the impeller adjustment. See Installation
for details.
Troubleshooting
58 Model VIC Installation, Operation, and Maintenance