EN
GEO_Rev1 - Operating Instructions
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11. TROUBLESHOOTING
OFF
WARNING
: Turn off the power supply before performing any operations.
Do not allow the pump or motor to run when dry even for a short period.
Strictly follow the user instructions and if necessary contact an authorised service centre.
PROBLEM
PROBABLE CAUSES
POSSIBLE REMEDIES
1)
The motor
does not start
1a) Unsuitable power supply
1b) Incorrect electrical connections
1c)
Engine overload protective
device cuts in.
1d) Blown or defective fuses
1e) Shaft blocked
1f) If the above causes have already
been checked, the engine may
be malfunctioning
g) The float switch is blocked or
broken
h) The float switches are connected
in the wrong sequence.
1a) Check that the mains frequency and voltage correspond
to the electrical characteristics shown on the indicator plate
1b) Connect the power supply cable to the terminal board
correctly. Check that the thermal overload protection is
set correctly (see data on the engine indicator plate) and
make sure that the fuseboard upline of the engine has been
properly connected
1c) Check the power supply and make sure that the pump shaft
is turning freely. Check that the thermal overload protection
has been set correctly (see engine indicator plate)
1d) Replace the fuses, check the electric power supply and
points a) and c)
1e) Remove the cause of blockage as indicated in the “Blocked
pump” instruction booklet
1f) Repair or replace the engine by applying to an authorised
service centre
g) .Replace the float switch
h) Reconnect the float switches in the right sequence.
2)
Pump
blocked
2a) Presence of solid bodies in the
pump rotor
2b) Bearings blocked
2a) If possible, dismantle the pump casing and remove any
solid foreign bodies inside the rotor, if necessary contact an
authorised service centre
2b) If the bearings are damaged replace them or if necessary
contact an authorised service centre
3)
The pump
functions
but no water
comes out
3a) Presence of air inside the pump
or suction tube
3b) Suction filter blocked
3a) Release the air from the pump using the pump plugs and/or
using the delivery control valve .Repeat the filling operations
until all air has been expelled
3b) Clean the filter, if necessary, replace it . See point 2b) also.
4)
Insufficient
flow
4a)
Pipes and accessories with
diameter too small causing
excessive loss of head
4b) Presence of deposits or solid
bodies in the internal passages
of the rotor suction filter
4c) Rotor deteriorated
4d) Worn rotor and pump case
4e) Excessive viscosity of the liquid
pumped (if other than water)
4f) Incorrect direction of rotation
4a) Use pipes and accessories suitable for the specific
application
4b) Clean the rotor and install a suction filter to prevent other
foreign bodies from entering
4c) Replace the rotor, if necessary, contact an authorised
service centre
4d) Replace the rotor and the pump casing
4e) The pump is unsuitable
4f) Invert the electrical connections on the terminal board or
control panel
5)
Noise and
vibrations
from the
pump
5a) Rotating part unbalanced
5b) Worn bearings
5c) Pump and pipes not firmly
attached
5d) Flow too strong for the diameter
of the delivery pipe
5e) Unbalanced power supply
5a) Check that no solid bodies are obstructing the rotor
5b) Replace the bearings
5c) Anchor the delivery and suction piping as needed
5d) Use bigger diameters or reduce the pump flow
5e) Check that the mains voltage is right
For the TROUBLESHOOTING of the electrical control panel, refer to the instructions
manual of the control panel.
