English (GB)
15
5. The pumps are
running, but deliver
no water.
a) The valves are closed. Open the valves.
b) The inlet pipe or pumps are
blocked by impurities.
Clean the inlet pipe or pumps.
c) The non-return valve is blocked
in the closed position.
Clean the non-return valve. Check that
the non-return valve moves freely.
d) The inlet pipe is leaky. Check the inlet pipe for leakages.
e) There is air in the inlet pipe or
pumps.
Vent and prime the pumps. Check the
inlet pipe for leakages.
6. The booster system
is unable to reach
the setpoint.
a) The consumption is too high. • Reduce the consumption, if possible.
• Install a bigger booster system.
b) Too many standby pumps have
been selected.
Reduce the number of standby pumps.
c) There is a pipe fracture or a
leakage in the system.
Check the system, and repair the
damaged parts, if necessary.
7. Leakage from the
shaft seal.
a) The shaft seal is defective.
Replace the shaft seal.
8. Noise. a) The pumps are cavitating. Clean the inlet pipe or pumps and
possibly the inlet strainer.
9. Very frequent starts
and stops.
a) The diaphragm tank precharge
pressure is not correct.
Set the correct precharge pressure.
Fault Possible cause Remedy
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