Troubleshooting - Franklin Electric FMIT Serie Manual Del Propietário

PROBLEM
Pump will not pump
Pump doesn't catch
prime
Priming takes a long time
Pump does not perform
as well as it should
Pump loses prime
*Excessive suction lift must take into consideration:
a) Size and length of pipe
b) Density and temperature of liquid
c) Pipe fi tting
d) Elevation above sea level
Including all of the above, we recommend that the total suction head not exceed 25 ft.
**An excessively worn impeller is mainly caused from
cavitation, which is caused by a number of situations, such as:
a) Restricted suction
b) Excessive suction lift
***The seal may be damaged due to:
a) normal wear
b) overheating
c) pumping chemicals that seal is not designed for.

TROUBLESHOOTING

PROBABLE CAUSE
Air leak in suction line.
The suction and/or discharge line(s) may
be blocked, or the valve(s) are closed, faulty
and/or blocked.
The end of the suction line is not sub-
merged.
Total head is too high for this pump to work
against.
Excessive suction lift*.
Suction line is quite long.
Air pockets or leaks in the suction line.
Flow is restricted due to:
a) Debris build-up.
b) Faulty or semi-open valve(s).
c) Piping/hosing used is smaller than the thread
sizes on the pump.
Insuffi cient submergence of the end of
the suction line.
Excessively worn impeller** and/or
wear plate.
Seal is damaged***. Liquid will be leaking
through the middle of the adapter.
Air pockets or leaks in the suction line.
Clogged impeller.
Liquid level drops below the end of the
suction line.
CORRECTIVE ACTION
Make sure suction hose is double-clamped at joints,
clamps are tight, fi ttings have thread compound and
are tight, and no nicks or cuts in hose.
Check to see that the lines and valves are in good
working order.
Increase its length, or move the pump closer to the
source of liquid.
Reduce total head or use a higher head pump.
Move the pump closer to liquid source.
Refer to "start-up" under operation.
Check the line for loose connections.
a) Clean the lines and fi ttings.
b) Check to see that the valves are in good working
c) Increase the size of hose/pipe to reduce friction
losses
The end of the suction line must be submerged.
Replace impeller and/or wear plate.
Replace seal.
Check suction line.
Remove casing to clean out.
Increase length of suction line or move the pump
closer to the liquid source.
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