DAB PULSAR Instrucciones Para La Instalación Y El Mantenimiento página 19

14. TROUBLESHOOTING
FAULT
1. The motor does not start and
makes no noise.
2. The pump does not deliver.
3. The pump does not stop.
4. The flow rate is insufficient
5. The overload protection
device stops the pump.
ENGLISH
CHECK (possible cause)
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.
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. The float does not interrupt pump operation.
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. 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.
B. If they are burnt-out, change them.
C. Check that the float moves freely
D. Turn the shaft as indicated in the
A. Remove the obstructions, as
B. Change the impellers or remove the
C. Check good operation of the valve
D. Regulate the length of the float
F. Prime the pump. (See Fig.2, pag. 2).
A. Check that the float moves freely
A. Remove any obstructions, as
B. Remove any obstructions.
C. Change the impellers.
D. Accurately clean the check valve.
E. Invert two wires in the power cable.
C. Accurately clean the pump.
D. Check for the occurrence of rubbing
17
REMEDY
and that it is efficient.
chapter on Warnings (Paragraph
6.3./6.4 ).
indicated in the chapter on Warnings
(Paragraph 6.5.).
obstruction.
and replace it if necessary.
switch cable (See chapter on
Warnings – Paragraph 9.3.).
and that it is efficient.
indicated in the chapter on Warnings
(Paragraph 6.5. ).
between moving and fixed parts;
check the state of wear of the
bearings (contact the supplier).