User manual

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Impeller is damaged
and leaking
Replace with a new impeller.
Total head is too
high.
There is air in the
pump or inlet, air
leak into the seal.
Check the reason, adjust it.
Screw off air drain screw cock, and eliminate the air. Check the
pipeline or change machinery seal.
The flow of water is not enough
Speed of engine is
not stable.
Adjust the speed of engine.
There is contact
between impeller
and flow guidance.
Listen to the sound carefully; if the impeller is making contact
with the case, then adjust.
Power consumption
of pump is too great
The impeller is
obstructed by weeds
or other debris.
Check and clean up.
Malfunction
Cause
Remedy
The connector of
inlet pipe is loose or
leakage.
Check inlet pipeline and remedy.
No flow at all
Suction head is too
high and causing
cavitations.
Check suction head and lower the position of pump.
Suction head is too
high and causing
cavitations.
Check suction head and lower the position of pump.
Output of water is
too large.
Decrease the output of water.
Inlet pipe is
obstructed by
foreign body so the
resistance is too
large.
Check inlet pipe and filter net and clean up.
Rotary part is loose.
Listen carefully and inspect the part which causes the noise. Stop
the machine to adjust.
Excessive vibration or noise
Installing for pump
unit is not stable.
Stop the machine to check and adjust.