English (GB)
9
7. Fault finding
DANGER
Electric shock
Death or serious personal injury
- Before starting any work on the product,
make sure that the power supply has
been switched off and that it cannot be
accidentally switched on.
CAUTION
Chemical hazard
Minor or moderate personal injury
- Make sure that the product has only
been used for water. If the product has
been used for pumping aggressive
liquids, flush the system with clean
water before you start work on the
product.
Fault
Cause
Remedy
1.
The pump does not
start.
a)
Supply failure.
Cut in the circuit breaker or replace the
fuses. If the new fuses also blow, check
the electrical installation.
b)
The pump is blocked by impurities. Clean the pump. Check or replace the
strainer in the inlet pipe.
c)
The motor is defective.
Replace the pump.
2.
The pump runs, but
gives no or just a
little water.
a)
The pump is not filled with water.
Prime the pump. See section
b)
The inlet pipe is blocked by
impurities.
Clean the pump. Check or replace the
strainer in the inlet pipe.
c)
The pump is blocked by impurities. Clean the pump. Check or replace the
strainer in the inlet pipe.
d)
The suction lift is too high, that is
higher than 7 metres.
Change the position of the pump.
e)
The inlet pipe is too long.
Change the position of the pump.
f)
The diameter of the inlet pipe is too
small.
Replace the inlet pipe.
g)
The inlet pipe is not immersed
deeply enough.
Make sure that the inlet pipe is
immersed sufficiently.
h)
The inlet pipe is leaking.
Repair or replace the pipe.
3.
The pump runs, but
gives no water or
delivers a reduced
quantity of water at
high pressure.
a)
The outlet pipe is blocked.
Clean the pipe or open the isolating
valves, if any.
Check that no additional work is being
carried out in the system.
4.
The pump stops
during operation.
a)
Single-phase motors:
The thermal switch in the motor
has tripped due to overheating.
The thermal switch cuts in
automatically when the motor has
cooled sufficiently.
If the problem still persists, check these
two possible causes:
• The impeller is stuck.
Clean the pump.
• The motor is defective.
Replace the pump.
