3
TROUBLESHOOTING
PROBLEM
PROBABLE CAUSES
CORRECTIVE ACTION
Pump will not run
1. No power or incorrect voltage
2. Brushes worn out
3. Motor has open circuit
4. Motor overheated
1. Supply correct voltage
2. Replace defective part
3. Replace defective part
4. If motor has auto-resetting thermal protector,
wait 15 minutes for motor to cool
Pump runs but no fluid is
pumped
1. Air leak or kink in hose
2. Defective cam or impeller
3. Suction lift too high
4. Inlet clogged
5. Pump too far from liquid
1. Repair or replace
2. Replace defective part
3. Lower pump
4. Clean inlet
5. Relocate pump
Pump will not prime or retain
prime after operating
1. Air leak or kink in hose
2. Defective cam or impeller
3. Seal worn
4. Gasket leaking
5. Groove worn in shaft at seal area
6. Suction lift too high
1. Repair or replace
2. Replace defective part
3. Replace defective part
4. Replace defective part
5. Replace defective part
6. Lower pump
Flow rate is low
1. Air leak or kink in hose
2. Defective cam or impeller
3. Incorrect voltage
4. Inlet clogged
1. Repair or replace
2. Replace defective part
3. Supply correct voltage
4. Clean inlet
Shaft seal leaks
1. Seal worn
2. Groove worn in shaft at seal area
3. Pump head loose on motor
1. Replace defective part
2. Replace defective part
3. Repair
Motor runs too hot
1. Incorrect voltage
2. Excessive discharge pressure
3. Impeller swollen
4. Liquid too viscous
5. Obstruction or kink in hose
6. Insufficient air flow on motor
1. Supply correct voltage
2. Reduce pressure
3. Replace defective part
4. Reduce viscosity of liquid
5. Repair or replace
6. Be sure ample fresh air is available at the motor
