VARISCO JE Series Instructions For The Use And Maintenance page 20

Below is a list of the main possible problems. This list does not cover all possible causes that lead to functioning
anomalies. Remember that the operations to be performed during troubleshooting must be established by a trained
technician who is authorised to work on live parts.
P
ROBLEM
THE CONTROL PANEL
IS COMPLETELY OFF
THE MACHINE DOES
NOT START WITH
CONTROLS ENGAGED
THE MOTOR
DOES NOT WORK
MOTOR OPERATION IS
NOT SMOOTH
THE THERMAL
PROTECTION
INTERVENES
INADVERTENTLY
Below is a list of the main inspections and common operations to be performed if a fault occurs. This list
does not cover all possible operations to be performed during troubleshooting, which must be looked out
for by a trained technician who is authorised to work on live parts.

Check the continuity of electric wiring inside the control panel.

Make sure that no metal dust or other material has gone into the equipment, which may have caused a
reduction in isolation or any conduction.
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USE AND MAINTENANCE MANUAL - ELECTRICAL EQUIPMENT
P C
OSSIBLE AUSE
a) No electric power supply
a) No electric power supply
b) Triggered emergencies
c) Triggered motor protections
a) Electric power supply
available
b) Triggered emergencies
c) Triggered motor protections
d) Damaged motor
a) Damaged motor
a) Power supply voltage at control
panel too low
b) Phase missing on power supply
voltage
c) Incorrect regulation
thermal protection relay
d) Motor power overload
V
ERIFICATIONS AND
a) Restore the power supply and check the
position of the main switch and the presence
of voltage on the main power supply line.
a) Restore the power supply and check the
position of the main switch and the presence
of voltage on the main power supply line.
b) Verify the emergency stop button is not
pressed.
c) Verify whether the thermal and magnetic
protection of motor has been triggered.
not a) Verify the presence of voltage on the electric
power line: check the position of the main
switch.
b) Verify the emergency stop button is not
pressed.
c) Verify whether the thermal and magnetic
protection of motor has been triggered.
d) Stop the motor and check the type of
damage.
a) Stop the motor and check the type of
damage.
a) Check the power supply voltage at control
panel line input.
b) Check the presence of all three power supply
phases at the control panel
of the c) Check thermal
relation to the electric motor rated current.
d) Check that the flow rate supplied by the
centrifugal pump during operation is within
the limits indicated in the pump performance
curve.
Ed. 2010/09 - Rev. 00 - Cod. M08527
S
OLUTIONS
protection regulation in