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C22000 Centrifugal Pump Troubleshooting

Possible Cause

Corrective Action

LOW OR NO DISCHARGE

Incorrect rotation

Refer to wiring diagram

Insufficient inlet pressure or suction head (NPSH Required)

Increase inlet pressure by adding more fluid to fluid source. (See Spec’s for minimum NPSH Required)

Total head too high

Lower discharge head

Leak in suction line

Repair or replace

Impeller clogged or damaged

Clean or replace

Wrong size piping

Make needed adjustments

Casing gasket leaking

Replace gasket

Suction or discharge line valves closed

Open

Mechanical seal leaking

Replace

LOSS OF SUCTION

Insufficient inlet pressure or suction head (NPSH Required)

Increase inlet pressure by adding more fluid to fluid source. (See Spec’s for minimum NPSH Required)

Clogged strainer

Clean or replace

PUMP VIBRATES AND/OR MAKES EXCESSIVE NOISE

Mounting plate or foundation not rigid enough

Reinforce

Foreign material in pump

Clean

Damaged impeller

Replace

Cavitation present

Check suction line for proper size and be sure valve is open. Remove excessive loops in suction line. (See Spec’s for minimum NPSH Required)

PUMP LEAKS AT SHAFT

Damaged or worn mechanical seal

Replace

Corrosion due to character of liquid pumped

Discontinue pumping liquid and consult factory

PUMP WILL NOT START OR RUN

Improperly wired

Refer to wiring diagram

Blown fuse or open circuit breaker

Replace fuse or close circuit breaker

Loose or broken wiring

Tighten connections and replace broken wiring

Impeller clogged

Clean

Motor shorted out

Replace

MOTOR PROBLEMS

Various

Consult qualified electrician

Overloading motor. Too much water delivery

Restrict outlet by closing down valve in discharge line

Liquid heavier and more viscous than water

Consult factory

Seal binding

Replace

Rotor binding

Repair or replace

Voltage and frequency lower than rating

Reconnect to rated voltage and frequency

Defects in motor

Repair or replace

PINHOLES IN THE CASTING. LIQUID DRIPS AROUND SEAL AREA BUT IS NOT SEAL

Cavitation caused by insufficient inlet pressure or suction head (NPSH Required)

Increase inlet pressure by adding a higher level of fluid to source or increasing inlet pressure. (See Spec’s for minimum NPSH Required)

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