ENGLISH
21
FAULTS
POSSIBLE CAUSES
REMEDIES
ONE OR MORE PUMPS IN THE
SET, WHEN STOPPED, TURN IN
THE OPPOSITE DIRECTION.
1.
2.
The respective non return or foot valves
do not close well or are blocked.
The respective suction pipe is not
hermetically sealed.
1.
2.
Check its seal and correct operation.
Testing under pressure, check the seal.
THE MOTOR OF A PUMP IN THE
SET IS VIBRATING.
1.
2.
3.
Pump blocked.
Worn bearings.
Electric cables interrupted.
1.
2.
3.
Release the pump.
Change the bearings.
Change the cables.
WATER HAMMER IN THE
SYSTEM.
1.
2.
Water hammer during operation of the
set.
Water hammer when turning off the
flow.
1.
2.
Check the non return valve of the hot water
distribution mains.
Install other aquaboxes or water hammer
deadening devices at the end of the pipe
where the phenomenon occurs.
A PUMP IN THE SET STOPS AND
DOES NOT START AGAIN.
1.
2.
3.
The protection of the Active Driver has
tripped.
Electropump blocked.
Presence of faults in the Active Driver.
1.
2.
3.
Check the absorption of the electropump.
Release the electropump.
Check the errors in the Active Driver*.
If necessary, change the Active Driver.
GREAT PRESSURE OSCILLATIONS
IN THE SYSTEM.
1.
2.
Suction pipe too long.
GP and GI parameters need regulating.
1.
2.
Check suction.
Set a new value for GP and GI.
If necessary add a diaphragm expansion
tank on the delivery manifold and set “
2
” in
the
Od
parameter of the Active Driver*.
* To regulate / check the parameters, see the documentation enclosed with the Active Driver module.
