Troubleshooting Chart
Symptom | Possible Cause(s) | Corrective Action | |||
Pump won’t | 1. | Blown fuse or open circuit breaker | 1. | Replace fuse or close circuit breaker. See wire size chart for | |
start or run |
|
|
| proper break/fuse size | |
at full speed | 2. | Power supply in OFF position | 2. | Turn power on | |
| |||||
| 3. | Incorrect voltage at motor (check volt- | 3. | Low voltage | |
|
| age with motor running) |
| a. Voltage must be within ± 10% of motor rated voltage. | |
|
|
|
| ||
|
|
|
| Check incoming voltage. Contact power company | |
|
|
|
| b. Make certain that voltage of motor matches voltage of | |
|
|
|
| power supply. See motor name plate and motor wiring | |
|
|
|
| diagrams | |
|
|
|
| c. Check wire size from main switch to pump. See wire | |
|
|
|
| size chart for correct wire size | |
| 4. | Loose, broken or incorrect wiring | 4. | Rewire any incorrect circuits. Tighten connections, replace | |
|
|
|
| defective wires | |
| 5. | Defective motor | 5. | Replace motor | |
| 6. | Pump hydraulic components clogged/ | 6. | Replace worn parts or entire pump. Clean parts if required | |
|
| worn/damaged |
|
| |
|
|
|
|
| |
Pump oper- | 1. | Manual or solenoid valves plumbed | 1. | a Check all valves on pump inlet and discharge sides of | |
ates, but |
| into system restricting flow |
| system to be sure they are opened properly to allow | |
delivers little |
|
|
| flow to and from the pump | |
or no water |
|
|
| b. Bleed trapped air in pump which keeps water from | |
|
|
|
| ||
|
|
|
| reaching the pump. (Normally | |
|
|
|
| due to closed valve in discharge plumbing) | |
| 2. | 2. | Check all | ||
|
|
|
| restricted | |
| 3. | Low line voltage | 3. | See low line voltage corrective action (above) | |
| 4. | Inadequate water supply to booster | 4. | Check pressure on inlet side of booster to be sure positive | |
|
| pump |
| pressure is maintained to the booster pump | |
| 5. | Undersized piping | 5. | Replace undersized piping | |
| 6. | Leak on inlet side of system | 6. | Make sure connections are tight. Repair leaks as necessary | |
| 7. | Inadequate, defective or plugged foot | 7. | Clean, repair or replace as needed | |
|
| valve and/or strainer |
|
| |
| 8. | Worn or defective pump parts or | 8. | Replace worn parts or entire plugged impeller Clean parts if | |
|
| pump. |
|
| |
| 9. | Suction lift too great | 9. | Pump should be operated under | |
|
|
|
| flooded suction only | |
| 10. | Pump not primed | 10. | Prime pump - Make certain inlet pipe is drawn up tight and | |
|
|
|
| pump and pipe are full of water | |
| 11. | Incorrect rotation, motor running | 11. | Reverse motor rotation can occur on three phase units. To | |
|
| backwards |
| correct, interchange any two incoming power leads. | |
|
|
|
|
| |
Excessive | 1. | Pump not secured to firm foundation | 1. | Secure properly | |
noise while | 2. | Piping not supported | 2. | Make necessary adjustments | |
pump in | |||||
3. | Restricted inlet line | 3. | Clean or correct | ||
| |||||
| 4. | Cavitation (noise like marbles in pump) | 4. | a. Reduce speed on direct drive | |
|
|
|
| b. Increase inlet pipe size | |
|
|
|
| c. Too viscous (material being pumped too thick | |
| 5. | Worn motor bearings | 5. | Replace bearings or motor | |
|
|
|
|
| |
Pump leaks | 1. | Worn mechanical seal (leaks at shaft) | 1. | Replace shaft (rotary) seal | |
| 2. | Worn | 2. | Replace | |
|
|
|
| steel shell |
11
FLINT & WALLING, INC. • 95 North Oak St. • Kendallville, IN 46755 • www.flintandwalling.com