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Installation and maintenance guide
6 TROUBLESHOOTING GUIDE
PUMP TROUBLE
Fail dispense
The quantity
dispensed is not
regular
The fluid
continues to exit
from the nozzle
at the end of the
dispensation
The pump motor
does not run
When fluid leaks
out from the
body of the pump
7 SYSTEM PRINCIPLES
The PCP progressive cavity pump is a volumetric pump that can dispense a uniform quantity of fluid
indipendently of its viscosity. The pump is made up of a geared motor, a series of seals, a chamber,
a rotor and a stator. Through an external controller it is possible to control with maximum precision
the rotation of the rotor inside the stator and consequently the quantity of fluid dispensed and the
speed with which it is dispensed. The series of seals allows the fluidic chamber and the eccentric
shaft to be kept separate, avoiding the flow of fluid into the drive parts. The stator makes it possible
to raise the fluid pressure by rotating the rotor inside it.
The PCP pump is a high-performance component but needs careful and timely use and maintenance.
POSSIBLE CAUSE AND CORRECTION
1) Check the fluid supply.
2) Check the electrical supply of the controller.
3) Check if there is fluid.
4) Check if the circuit is full of fluid.
5) Check that the nozzle is not clogged.
6) Check the pump motor rotate freely
1) Check to see if there was a change in the controller values setting.
2) Check if the fluid has hardened inside the pump chamber.
3) Check to see if the nozzle is clogged.
4) Check that there are no bubbles in the fluid conduit and inside the pump chamber.
5) Check that the fluid supply pressure is sufficient to keep filled the chamber of the
volumetric pump.
6) Check to see if there is a leak in the fitting of the fluid connection.
1) Check if the stator is damaged.
2) Check that there are no air bubbles inside the fluid.
3) Check that there are no air bubbles in the pump.
4) Verify that at rest the motor does not continue to turn.
5) Verify that the pressure of the incoming fluid does not exceed from the one shown in
the datasheet.
1) Check the connection of the motor cable.
2) Check the setting values of the controller.
3) Check that the fluid has not hardened inside the pump.
1) Check the gaskets between the chamber and the motor.
2) Check the O-ring between the chamber and the gasket block.
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