ENGLISH
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13. TROUBLESHOOTING
FAULT
CHECK (possible cause)
REMEDY
1.
The motor does not start
and makes no noise.
A.
Check that the motor is live and that the
mains voltage corresponds to the voltage
on the data plate.
B.
Check the protection fuses.
C.
The float switch does not allow starting.
D.
The shaft is not turning.
B.
If they are burnt-out, change
them.
C.
Check that the float moves
freely and that it is efficient.
D.
Turn the shaft as indicated in
the chapter on Warnings
(Paragraph 6.3./6.4 ).
2.
The pump does not
deliver.
A.
The suction filter or the pipes are
blocked.
B.
The impellers are worn or blocked.
C.
The check valve, if installed on the
delivery pipe, is blocked in closed
position.
D.
The fluid level is too low. On starting,
the water level must be higher than the
filter level.
E.
The head required is higher than the
pump’s characteristics.
F.
In the PULSAR DRY versions the pump
is not primed.
A.
Remove the obstructions, as
indicated in the chapter on
Warnings (Paragraph 6.5.).
B.
Change the impellers or remove
the obstruction.
C.
Check good operation of the
valve and replace it if necessary.
D.
Regulate the length of the float
switch cable (See chapter on
Warnings – Paragraph 9.3.).
F.
Prime the pump. (See Fig.2).
3.
The pump does not stop.
A.
The float does not interrupt pump
operation.
A.
Check that the float moves
freely and that it is efficient.
4.
The flow rate is
insufficient
A.
Check that the suction filter is not
partially clogged in PULSAR pumps.
B.
Ensure that the impellers or the delivery
pipe are not partly blocked or fouled
with scale.
C.
Ensure that the impellers are not worn.
D.
Ensure that the check valve (if fitted) is
not partly clogged.
E.
Check the direction of rotation in three-
phase versions ( See Chapter on Electrical
connection - Paragraph 8.4. ).
A.
Remove any obstructions, as
indicated in the chapter on
Warnings (Paragraph 6.5. ).
B.
Remove any obstructions.
C.
Change the impellers.
D.
Accurately clean the check
valve.
E.
Invert two wires in the power
cable.
5.
The overload protection
device stops the pump.
A.
Ensure that the fluid to be pumped is not
too dense because it would cause
overheating of the motor.
B.
Ensure that the water temperature is not
too high (see liquid temperature range).
C.
The pump is partly blocked by
impurities..
D.
The pump is mechanically blocked.
C.
Accurately clean the pump.
D.
Check for the occurrence of
rubbing between moving and
fixed parts; check the state of
wear of the bearings (contact
the supplier).
