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7.4 Spare parts
Always specify the exact electric pump type and identification code when requesting technical
information or spare parts from our Sales and Service Department.
Use only original spare parts to replace any worn or faulty components. The use of unsuitable spare
parts may cause malfunctions, damage and injuries.
Refer to the diagrams in section 10.9.
8. Troubleshooting Information for users and maintenance personnel
PROBLEM PROBABLE CAUSE POSSIBLE SOLUTION
No power supply. Restore the power supply.The electric pump does not start.
The main switch is on. Triggering of thermal relay or motor
protector found in the electric control
panel.
Reset the thermal protector.
Pump or auxiliary circuits protection
fuses blown.
Replace fuses.
Incorrect connection to capacitors
(single-phase version)
Check the connections in the electric
panel
Triggering of start/stop device ( float).
Triggering of protection device against
dry running (float).
Check the water level in the tank. If
everything is in order, check the
protection device and its connection
cables.
Triggering of motor thermal sensor (if
present).
Wait for the pump motor to cool down.
Triggering of water detection sensor in
the oil chamber (if present).
Electric motor failure.
¼section 7.2.4.
Power supply cable is damaged.
Electric motor short circuit.
Contact our Sales and Service
Department.
The electric pump starts up but the
thermal protector is immediately
triggered or the fuses blow. Thermal protector or fuses not suited to
the motor current.
Check the components and replace as
necessary.
Motor overload. Check the operating conditions of the
electric pump and reset the protection.
Wrong rotation direction. Check the direction of rotation and, if
necessary, exchange two phases in the
electrical panel if the pump is a three-
phase model, or check all the
connections if it is a single-phase model.
A phase in the power supply is missing. Check the power supply.The electric pump starts up but, after a
short period of time, the thermal
protector is triggered or the fuses blow. Power supply voltage not within the
motor’s working limits.
Check the operating conditions of the
electric pump.
The electric panel is situated in an
excessively heated area or is exposed to
direct sunlight.
Protect the panel from heat sources and
from the sun.
There are foreign bodies (solid or fibrous
substances) inside the pump, the
impellers are jammed.
Extract the electric pump and clean it.The electric pump starts up but, after a
varying period of time, the thermal
protector is triggered.
The pump is overloaded because it is
sucking a dense and viscous liquid.
Check the actual power requirements
based on the characteristics of the
pumped liquid.
The temperature of the sucked liquid is
too high.
Check the operating conditions of the
electric pump.
Worn motor bearings Contact our Sales and Service
Department.
The electric pump starts up but does not
deliver the required flow.
Wrong rotation direction. Check the direction of rotation and, if
necessary, exchange two phases in the
electrical panel if the pump is a three-
phase model, or check all the
connections if it is a single-phase model.
Air in the pipes. Bleed the air.
Air in the pump. Bleed the air and check the liquid level
(¼section 3.1.6).
Piping and/or pump clogged. Disassemble and clean.
Valves locked in closed or partially
closed position.
Disassemble and clean, if necessary
replace the valve.
The electric pump starts up but it does
not stop.
Failure of start/stop device (float). Check the water level in the tank. If
everything is in order, check the device
and its connection cables.
The system’s general protection cuts in. Short circuit. Check electrical system.
WARNING