Trouble Shooting Pump Problems
PROBLEM
A. Failure to Prime
- motor operates, but no pump discharge.
B. Motor Fails to Turn On
C. Pump Fails to Turn Off
D. Low Flow and Pressure
E. Pulsating Flow
- Pump Cycling On and Off.
PROBABLE CAUSE
1) Restriction in intake or discharge line.
2) Air leak in intake line.
3) Punctured pump diaphragm.
4) Defective pump check valve.
5) Crack in pump housing.
6) Debris in filter or check valve.
1) Pump motor not electrically connected.
2) Fuse blown.
3) Loose wiring or connection.
4) Pressure switch failure.
5) Defective motor or rectifier.
6) Frozen cam-bearing.
1) Faulty pressure switch.
1) Blocked suction filter.
2) Air leak at pump intake.
3) Accumulation of debris inside pump & plumbing.
4) Worn pump bearing (excessive noise).
5) Punctured pump diaphragm.
6) Defective rectifier or motor.
7) Insufficient voltage to pump.
1) Restricted pump delivery.
2) Nozzle too small.
REMEDY
1) Open all line valves, check for “jammed” check
valve poppets & clean clogged lines.
2) Fix air leak in intake line.
3) Replace pump diaphragm.
4) Repair or replace pump check valve.
5) Replace pump housing.
6) Clean filter or check valve.
1) Make electrical connection.
2) Replace fuse.
3) Repair loose wiring or connection.
4) Replace pressure switch.
5) Replace motor or rectifier.
6) Repair or replace cam-bearing.
1) Replace faulty pressure switch.
1) Clean the suction filter.
2) Repair air leak on the pump intake.
3) Clean the inside of the pump and plumbing.
4) Replace pump bearing.
5) Replace pump diaphragm.
6) Replace rectifier or motor.
7) Correct voltage to pump.
1) Check discharge lines, fittings, valves & spray
nozzles for clogging or undersizing.
2) Ensure nozzle is correct size.