Flint & Walling SPJ - Manual (Page 7)

7
© Copyright 2012. All rights reserved.
TROUBLESHOOTING CHART
Symptom Possible Cause(s) Corrective Action
Little or no discharge
Pump will not deliver water or develop
pressure
Loss of suction
Pump vibrates and/or makes
excessive noise
Pump will not start or run
Pumps leaks at shaft
1. Casing not initially filled with water
2. Total head too high
3. Suction lift too high, or too long
4. Impeller plugged
5. Hole or air leak in suction line
6. Foot valve too small
7. Impeller damaged
8. Foot valve or suction line not
submerged deep enough in water
9. Insufficient inlet pressure or suction
head
10. Suction piping too small
11. Motor wired incorrectly
12. Casing gasket leaking
13. Suction or discharge line valves
closed
1. No priming water in casing
2. Mechanical seal is leaking
3. Leak in suction line
4. Discharge line is closed and priming
air has nowhere to go
5. Suction line (or valve) is closed
6. Pump is down
7. Foot valve is leaking
8. Suction screen clogged
1. Air leak in suction line
2. Suction lift too high
3. Insufficient inlet pressure or suction
head
4. Clogged foot valve or strainer
1. Mounting plate or foundation not rigid
enough
2. Foreign material in pump
3. Impeller damaged
4. Worn motor bearings
5. Suction lift too high
1. Improperly wired
2. Blown fuse or open circuit breaker
3. Loose or broken wiring
4. Stone or foreign object lodged in
impeller
5. Motor shorted out
6. Thermal overload has opened circuit
1. Worn mechanical seal
1. Fill pump casing
2. Shorten suction lift and/or change
head
3. Lower suction lift, install foot valve and
prime, or shorten length of suction line
4. Clean
5. Repair or replace; do not use Teflon
tape; use pipe sealing compound
6. Match foot valve to piping or install
one size larger foot valve.
7. Replace
8. Submerge lower in water
9. Increase inlet pressure by adding
more water to tank or increasing back
pressure
10. Increase to pump inlet size or one size
larger
11. Check wiring diagram
12. Replace
13. Open
1. Fill pump casing
2. Replace (see Rotary Seal
Replacement)
3. Repair or replace
4. Open
5. Open
6. Replace worn parts
7. Replace foot valve
8. Clean or replace
1. Repair or replace
2. Lower suction lift, install foot valve and
prime
3. Increase inlet pressure by adding
more water to tank or increasing back
pressure
4. Unclog
1. Reinforce
2. Disassemble pump and clean
3. Replace
4. Replace
5. Lower suction lift, install foot valve and
prime
1. Check wiring diagram on motor
2. Replace fuse or close circuit breaker
3. Tighten connections, replace broken
wiring
4. Disassemble pump and remove
foreign object
5. Replace
6. Allow unit to cool, restart after reason
for overload has been determined
1. Replace (see Rotary Seal
Replacement)