IBO 2” STING Betriebsanleitung Seite 23

POTENTIAL PROBLEMS DURING OPERATION AND SOLUTIONS:
Symptom:
The pump is not
running
The pump keeps
switching on and off
The pump is running
but is not feeding water
or is feeding too little
water
Frequent switching on
and off the pump
Possible cause:
The security device against
dry run has been engaged
The security device against
over-current has been
engaged
No power supply
A break in one wire of the
feed cable
Incorrect voltage or drop
during start-up
The filter screen is blocked
at suction
Incorrect direction of the
motor revolution
(Valid only for 3 phase
motor)
Too high resistance during
the flow through the
delivery pipe (hose).
Sand in the pump (dirty
water)
Supply voltage is too low
Too little water in the well
Pressure vessel is too small Replace the vessel with a bigger one
No airbag in the pressure
vessel
The difference between the
switching on and switching
off pressure at pressure
switch is too small
Solution to the problem:
Wait until the quantity of water in the well is sufficient so the
pump is switched on automatically.
Wait until the motor cools down and switch on the pump.
Check the cause of the overload. Remove the cause.
Make sure the electric plug of the pump is properly inserted in
electric socket.
Check the corks at home and all installation switches which
may cut off the power supply from the network
Check if power supply is ensured near your house – the
power company may have cut off power in a larger area.
Check resistance between the cable wires
Check voltage
Disconnect the pump from electrical supply.
Take the pump out of the well and clean the filter
Change the two veins of the feed cable on the feeding strip
(only for three-phase motors)
Check if the permitted lifting height for this specific type of
pump is not exceeded. The lifting height to be generated by
the pump depends on the level difference between water
table in the well the water is pumped out and the level at
which the water is pumped, the length of the delivery pipe
(hose) and its diameter. If resistance is too high for this
specific type of pump replace the pump with a different one,
of greater lifting height.
Remove sand from the pump. Clean the well.
Check the supply voltage
Check the pump's position. The pump's fuel feed port should
be at least 2 m from the lowest dynamic level of water table.
Check the air pressure in the vessel.
Add if necessary. If the situation repeats often check if the
diaphragm in the vessel is not broken
Adjust the switch
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