ENGLISH
9
Top up the oil level inside the sealing oil chamber using a special funnel inserted in the hole in the cap (64). Screw the drainage cap (64) back
on and perform the disassembly operations in inverse order to reassemble the pump after having spread a suitable amount of teflon grease in
the seat of the sand guard (15).
Attention! During assembly, fit all the O-rings correctly, without damaging them.
OLD OIL MUST BE DISPOSED OF AS REQUIRED BY THE REGULATIONS IN FORCE.
10. 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.
B.
-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).
