Instructions User guide

4
FLINT & WALLING, INC. • 95 North Oak St. • Kendallville, IN 46755 • www.flintandwalling.com
Troubleshooting Chart / Booster Systems
Symptom Possible Cause(s) Corrective Action
Pump won’t
start or run
at full speed
Pump fails
to continue
to run
1. Blown fuse or open circuit breaker 1. Replace fuse or close circuit breaker. See wire size chart for
proper break/fuse size
2. Power supply in OFF position 2. Turn power on
3. Incorrect voltage at motor (check
voltage with motor running)
3. Low voltage
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/
worn/damaged or seized
6. Replace worn parts or entire pump. Clean parts if required
7. Flow sensor installed incorrectly 7. Plumb flow sensor correctly with water supply entering inlet
side of the flow sensor and the outlet side plumbed to the
pump inlet.
8. There is no positive supply of water to
the pump.
8. Provide a positive supply of water to the pump.
Pump
operates,
but delivers
little
or no water
1. Manual or solenoid valves plumbed
into system restricting flow
1. a Check all valves on pump inlet and discharge sides of
system to be sure they are opened properly to allow
flow to and from the pump
b. Bleed trapped air in pump which keeps water from
reaching the pump. (Normally
due to closed valve in discharge plumbing)
2. In-line filter restricting flow 2. Check all in-line filters to be sure they are not plugged or
restricted
3. Low line voltage 3. See low line voltage corrective action (above)
4. Inadequate water supply to booster
pump
4. Check pressure on inlet side of booster to be sure positive
pressure is maintained to the booster pump
5. Undersized piping 5. Replace undersized piping
6. Worn or defective pump parts or pump. 8. Replace worn parts or entire plugged impeller Clean parts if
7. Suction lift too great 9. Pump should be operated under
flooded suction only
8. Pump not primed 10. Prime pump - Make certain inlet pipe is drawn up tight and
pump and pipe are full of water
Excessive
noise while
pump in
operation
1. Pump not secured to firm foundation 1. Secure properly
2. Piping not supported 2. Make necessary adjustments
3. Restricted inlet line 3. Clean or correct
4. Cavitation (noise like marbles in pump) 4. Increase inlet pipe size back to source
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 o-ring seals 2. Replace o-ring seals, located inside both ends of the stainless
steel shell