Power Fist 8519209 Manuel D'utilisateur page 9

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8519209
Problem
The pump runs but does not
discharge liquid.
The pump does not deliver the
rated capacity.
The pump cycles continually.
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Pompe pour eaux usées en acier inoxydable de 1/2 CV
Possible Cause(s)
The check valve is
installed backwards.
The check valve is stuck
or plugged.
The lift is too high for
the pump.
The inlet to the impeller
is plugged.
The pump is air locked.
The lift is too high for
the pump.
Low voltage, the speed is
too slow.
The impeller or discharge
pipe is closed.
No check valve in a long
discharge pipe is allowing
liquid to drain back into
the sump.
The check valve is leaking.
The basin is too small for
the inflow.
Suggested Solution(s)
Check the flow indicating arrow on
the check valve body to insure it is
installed properly.
Remove the check valve and
inspect for proper operation.
Check the rating table in the
Specifications section.
Remove the pump from service
and clean.
Shut the power off for
approximately 1 minute, then
restart the pump. Repeat several
times to clear the air from
the pump.
Check the rated
pump performance.
Check for proper voltage to make
certain it corresponds to the
nameplate voltage.
Remove the pump from service
and clean.
Install a check valve in the
discharge line.
Inspect the check valve for the
correct operation.
Install a larger basin.
V 3,04
9

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