22
ENGLISH
Three-phases pumps
The electronic card foresees the possibility of
temporizing a delayed switching-off of the
last running pump subordinate to the pres-
sure switch input, with a delay of a minimum
3’’ up to a maximum of 180’’.
Rotating the potentiometer T1 towards right, accessible on
the control board inside the control panel, the switching-off
time increases.
FUNCTIONING ANOMALIES
The pumps do not start
All the pilot lights are off
∙ No power supply at the distribution board = Supply power to
the distribution board
∙ The supply or the exit fuses of the transformer (three-phas-
es version) are disconnected = Replace the disconnected
LINE pilot light and MAN pilot light are on
∙ The group is set to manual mode = Activate the AUTOMAT-
IC mode pressing the [AUT/MAN] pushbutton
LINE pilot light on, B.LIV or HYDRAULIC FAULT pilot light
on
∙ Lack of water in the first collection tank = Restore the wa-
ter level
∙ The level control is not operating or is damaged = Install or
replace the level control
∙ The level control is not operating due to the disconnected
bridge = Verify the bridge
LINE pilot light on; AUT pilot light on; Running pump pilot
light(s) on
∙ The fuses of one or more motor pumps are disconnected =
Replace the fuses of the motor pump(s)
LINE pilot light on; AUT pilot light on; ELECTRIC FAULT pilot
light on
∙ Overload or missing electrical absorption of one or more
motor pumps = Verify the correct MANUAL mode selection.
In case the pumps are working, reactivate the AUTOMATIC
mode. On the contrary, contact the service center.
LINE pilot light on; AUT pilot light on; Running pump pilot
light(s) off
∙ The pressure switches are not calibrated, disconnected or
damaged = Control the pressure switches and their con-
nections
The motorpumps do not stop
LINE pilot light on; Running pump pilot light(s) on
∙ The pump(s) operate in MANUAL mode = Activate the AU-
TOMATIC mode pressing the [AUT/MAN] pushbutton
∙ The contact of one or more pressure switch is closed be-
cause of a calibrating defect = Calibrate the pressure
switch(es)
∙ The connecting tube of the pressure switches are obstruct-
ed = Eliminate the obstruction
∙ The pressure switches cable is by-passed = Verify pressure
switches electric connections
∙ The check valves are dirty or damaged = Clean or replace
the valves
∙ The timing of the pumps is activated = Bring to the minimal
operating time
The motor pumps do not reach the pressure
reported on the nameplate
LINE pilot light on; Running pump pilot light(s) on
∙ Check valves partially obstructed = Clean the valves
∙ Shut-off valves partially closed or obstructed = Open en-
tirely and clean the valves
∙ Reversed direction of rotation = Invert the direction of rota-
tion of the motor pumps (three-phases version)
∙ Motor pump disabled = Eliminate possible air locks in the
∙ suction pipe or in the motor pump
