Maintenance manual for technical assistance
27
Manual code 10066846 / Rel. 0.00 / March 2012
PROBLEM
CAUSE
SOLUTION
The pump works below the
nominal capacity
The inlet is clogged even partially.
clean the pump filter.
The pump rotates in the wrong direction.
check the motor.
The pump is not properly calibrated.
calibrate the pressure adjusting
screw.
The motor runs at a low RPM.
check the voltage or replace the
motor.
The motor runs at a low RPM.
The inside of the pump is damaged due
to the infiltration of foreign matter.
Replace the pump.
The pump is noisy.
The pump and the motor are not aligned. Install the pump-motor joint.
The gasket or the o-Ring of the pressure
adjusting screw or the filter is defective.
Replace the gasket and the o-Ring,
take care not to change the calibra-
tion of the valve.
The joint, the coupling screw or the V-
shaped clamp, are loose.
align and tighten the components
which are loose.
The inlet is clogged even partially.
clean the filter-holder.
The hex nut of the pressure adjusting
screw or the filter are loose.
Tighten the hex connection of the
pressure adjusting screw and the filter.
The cup is dirty with
splashed coffee.
Steam pockets during brewing.
Reduce the water temperature.
air pockets in the hydraulic circuit.
Tighten fittings or connectors which
are loose.
The flow reducer of the brewing unit is
unsuitable.
Replace the flow reducer.