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MALFUNCTION
THE MOTOR STOPS SUDDENLY OR THE
THERMAL PROTECTOR INTERVENES DUE
TO OVERLOAD
THE PUMP FUNCTIONS BELOW NOMINAL
CAPACITY
THE PUMP IS NOISY
THE CUP IS DIRTY WITH SPLASHED
COFFEE
Technical manual
CAUSE
• Lime scale and mineral build-ups in the pump have
caused it to jam.
• The pump and the engine are not aligned.
• The motor is faulty.
• The motor is wired with non-conforming voltage.
• The inlet is clogged, perhaps only partially.
• The rotation sense of the pump is incorrect.
• The pressure relief valve is not properly calibrated.
• The motor runs at low RPM.
• The inside of the pump is damaged due to the infiltra-
tion of foreign materials.
• The pump and the engine are not aligned.
• The seal or O-Ring of the pressure relief valve or filter
is faulty.
• The joint, the coupling screw or the V-shaped clamp
are loose.
• The inlet is clogged, perhaps only partially.
• The hex nut of the pressure relief valve or filter is loose.
• Steam pockets in the delivery system.
• Air pockets in the hydraulic circuit.
• Coffee is ground too coarsely
SOLUTION
• Check the status of the pump and replace it,
if necessary.
• Install the motor-pump joint.
• Replace the engine.
• Ensure the power supply voltage of the motor is
correct.
• Clean the filter holder.
• Check the engine.
• Calibrate the relief valve.
• Check the voltage or replace the motor.
• Replace the pump.
• Install the motor-pump joint.
• Replace the seal and O-Ring, taking care not to change
the calibration of the valve.
• Align and tighten the components which are loose.
• Clean the filter holder.
• Tighten the hex connection of the pressure relief
valve and filter.
• Reduce the water temperature.
• Check the cause and eliminate the problem.
• Adjust the grinding suitably.
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