English (GB)
15
4. System
overpressure.
Yes
a) The setpoint is set too high. The
difference between the outlet
pressure and the inlet pressure
must not exceed 3.5 bar (51 psi).
Reduce the pressure to a new setpoint
(maximum 3.5 bar (51 psi) + positive
inlet pressure).
Example: If the inlet pressure is 0.5 bar
(7 psi), the maximum outlet pressure is 4
bar (58 psi).
Yes
b) The maximum pressure has been
exceeded, the inlet pressure is
higher than 6 bar, 0.6 MPa (87
psi).
Check the inlet conditions.
Yes
c) The maximum pressure has been
exceeded. Equipment elsewhere
in the system causes a high
pressure at the pump, for
example water heater or defective
safety equipment.
Check the installation.
5. You can reset the
pump, but it runs
only for a few
seconds.
Yes
a) Dry running or water shortage.
Check the water source, and prime the
pump.
Yes
b) The inlet pipe is blocked by
impurities.
Clean the inlet pipe.
Yes
c) The foot or non-return valve is
blocked in closed position.
Clean, repair or replace the foot or
non-return valve.
Yes
d) There is a leakage in the inlet
pipe.
Repair the inlet pipe.
Yes
e) Air in the inlet pipe or the pump.
Prime the inlet pipe and the pump.
Check the inlet conditions of the pump.
6. You can reset the
pump, but it starts
repeatedly,
immediately after
stopping.
No
a) The internal non-return valve is
defective or blocked in completely
or partly open position.
Clean, repair or replace the non-return
valve.
No
b) The tank precharge pressure is
not correct.
Adjust the tank precharge pressure to 70
% of the required outlet pressure.
Fault
G
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Autom
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Cause
Remedy
