GB
- 26 -
Faults
Possible cause
Remedy
Insu
ffi
cient
pumping rate
The intake line has a leak or
is damaged
Check the following points for leaks:
- Intake line
- Water
fi
lling screw / water drain screw / ventilation
screw / coarse
fi
lter cap
- Connection points of the intake line
Intake height too high.
Check the intake height.
The intake cage (incl. the
non-return valve) is soiled.
Clean the intake cage (incl. the non-return valve).
The coarse
fi
lter (incl. the
non-return valve) is soiled.
Clean the coarse
fi
lter (incl. the non-return valve).
The hose on the discharge
side is kinked.
Remove any kinks in the hose.
The cross-section on the
discharge side becomes
narrower.
Avoid narrow points.
The pump’s delivery rate
depends on the delivery
head and on the connected
peripherals.
Take account of the maximum delivery head, change
the hose diameter or hose length if necessary.
The motor
does not start
No power available.
Check the fuses and the electrical connection.
The impeller is blocked.
Use a screwdriver to turn the motor shaft through the
fan hood (release the stuck mechanical seal).
The thermostat
switches o
ff
the pump
Overheating / overloading of
the pump
Let the equipment cool down!
The temperature of the
pumped medium or the en-
vironment is too high.
Take account of the permitted temperature of the
pumped medium.
Ensure that the pump is provided with adequate
cooling.
Dry-running of the pump.
Eliminate the cause of the dry-running.
Note the points under “Pump fails to prime”.
Prevent dry-running.
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