ENGLISH
24
MODIFICATIONS AND SPARE PARTS
Any modification not authorized beforehand relieves the manufacturer of all
responsibility. All the spare parts used in repairs must be original ones and the
accessories must be approved by the manufacturer so as to be able to guarantee
maximum safety of the machines and systems in which they may be fitted.
The manufacturer declines all responsibility for possible errors in this booklet, if due to misprints or
errors in copying. The company reserves the right to make any modifications to products that it
may consider necessary or useful, without affecting the essential characteristics.
TROUBLESHOOTING
FAULT CHECK
(possible cause)
REMEDY
1.
The motor does not
start and makes no
noise.
A.
Check that the motor is live.
B.
Check the protection fuses.
C.
The float switch does not allow starting.
B.
If they are burnt-out, change them.
C.
-Ensure that the float moves freely.
-Ensure that the float is efficient (contact
the supplier).
2.
The pump does not
deliver.
A.
The intake grid or the pipes are blocked.
B.
The impeller is worn or blocked.
C.
The check valve, if installed on the
delivery pipe, is blocked in closed
position.
D.
The level of the liquid is too low. When
starting, the level of the liquid must be
higher than that of the strainer.
E.
The required head is higher than the
pump characteristics.
A.
Remove the blockage.
B.
Change the impeller or remove the
blockage.
C.
Check that the valve is operating
correctly and replace it if necessary.
D.
Adjust the length of the float switch cable
(SEE THE PARAGRAPH ON
"ADJUSTING THE FLOAT SWITCH").
3.
The pump does not
stop.
A.
The switch is not disactivated by the
float.
A.
-Ensure that the float moves freely.
-Check float efficiency (the contacts
could be damaged - contact the supplier).
4.
The flow is
insufficient.
A.
Ensure that the intake grid is not partly
blocked.
B.
Ensure that the impeller or the delivery
pipe are not partly blocked or encrusted.
C.
Ensure that the impeller is not worn.
D.
Ensure that the check valve (if fitted) is
not partly clogged.
E.
On three-phase motors, check that the
direction of rotation is correct (See the
paragraph on "CHECKING THE
DIRECTION OF ROTATION").
A.
Remove any blockage.
B.
Remove any blockage.
C.
Change the impeller.
D.
Carefully clean the check valve.
E.
Invert the connection of two supply
wires.
5.
The thermal overload
protection stops the
pump.
A.
Check that the liquid to be pumped is not
too dense as this could cause overheating
of the motor.
B.
Check that the water temperature is not
too high.
C.
The pump is partly blocked by impurities.
D.
The pump is mechanically blocked.
C.
Carefully clean the pump.
D.
Check whether there is rubbing between
the moving and fixed parts; check the
wear of the bearings (contact the
supplier).
