13
The pump works
but does not
feed water
Pressure stub pipe of the pump
or the pressure pipeline (hose) is
blocked
Disconnect electrical supply from the
pump. After taking out the pump
from the tank, unblock the pressure
stub pipe. Check and possibly clear
the pressure pipeline (hose).
Too large resistance at the
flow through the pressure
pipeline (hose).
Check whether the maximum
pressure for a given type of pump is
not exceeded. Pressure must be
created by the pump is influenced by
the difference between the water
level in tank with we pump form and
the level we pump to, the length of
the pressure pipeline (hose) and its
diameter. If resistance is too large
for a given type of pump, replace the
pump with another one with greater
pressure.
Not enough water in the pumping
well
Check whether the float switch is not
suspended on a tank wall preventing
automatic turning off. Unblock the
float switch.
The pump does not
shut down in spite
of pumping out the
water
The float switch is suspended
on the tank wall or on the
pressure pipeline (hose)
Check whether the float switch is not
suspended on a tank wall preventing
automatic turning off. Unblock the
float switch
The float switch is blocked in"on"
position
Replace the float switch in an
authorised service point
Operation of the
pump interrupted.
Thermal switch
installed inside the
pump interrupts
the supply of
power.
The pump is not completely
submerged in water
Check water level in the pumping
well. Unblock the suspended
float switch
Temperature of the pumped
water is too high.
Check whether water temperature
is not too high for a given type of
pump.
The pump often
turns on and off
Return valve not installed on the
pressure stub pipe. When the
pump pumps out water to the level
at which the float switch turns off
the pump, water from the pressure
pipeline (hose) flows back to the
well. After flowing in the sufficient
quantity of water, the float switch
turns on the pump. The cycle is
constantly repeated
Install a return valve on the
pressure stub pipe of the pump thus
preventing return of water to the
pump well.
