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 connections
THE MOTORPUMPS DO NOT STOP
LINE PILOT LIGHT ON; RUNNING PUMP PILOT LIGHT(S) ON
• The pump(s) operate in MANUAL
mode = Activate the AUTOMATIC mode
pressing the [AUT/MAN] pushbutton
• The contact of one or more pressure
switch is closed because of a
calibrating defect = Calibrate the
pressure switch(es)
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 entirely and clean
the valves
• The connecting tube of the pressure
switches are obstructed = Eliminate
the obstruction
• The pressure switches cable is by-
passed = Verify pressure switches
electric connections
• Reversed direction of rotation = Invert
the direction of rotation of the motor
pumps (three-phases version)
• 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
• Motor pump disabled = Eliminate
possible air locks in the
• suction pipe or in the motor pump
GB
27