DAB PULSAR, Инструкция по установке и обслуживанию

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ENGLISH
17
14. 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, pag. 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).