Wega Concept Use And Maintenance Manual page 34

Wegaconcept
SHUTDOWN OF THE ELECTRONIC SYSTEM
THE PUMP LEAKS WATER
THE MOTOR STOPS SUDDENLY OR THE
THERMAL PROTECTOR INTERVENES DUE
TO OVERLOAD
THE PUMP FUNCTIONS BELOW NOMINAL
CAPACITY
THE PUMP
MAKES NOISE
THE CUP IS DIRTY WITH SPLASHED
COFFEE
34
• The control unit fuse F4 is burned out.
• One of the volumetric dosing device's contacts is
grounded
• Poor mechanical grip of the shaft or O-Ring seal.
• The inlet and outlet connections are loose.
• The hex nut of the pressure relief valve or fi lter is
loose.
• The seal or the O-Ring of the pressure relief valve
or fi lter is faulty.
• Lime scale and mineral build-ups in the pump have
caused it to jam.
• The pump and motor 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
infi ltration of foreign materials.
• The pump and the engine are not aligned.
• The seal or O-Ring of the pressure relief valve or
fi lter 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 fi lter is
loose.
• Steam pockets in the delivery system.
• Air pockets in the hydraulic circuit.
• Coff ee is ground too coarsely
• Replace fuse F4
• Check the connection of the volumetric dosing
device
• Check the status of the pump and take any corrective
action which may be required.
• Tighten the connections.
• Tighten the hex connection of the pressure relief
valve and fi lter.
• Replace the seal and O-Ring, taking care not to
change the calibration of the valve.
• Check the status of the pump and replace it, if
necessary.
• Install the motor-pump joint
• Replace the motor.
• Ensure the power supply voltage of the motor is
correct.
• Clean the fi lter 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 fi lter holder.
• Tighten the hex connection of the pressure relief
valve and fi lter.
• Reduce the water temperature.
• Check the cause and eliminate the problem.
• Adjust the grinding suitably.
Technical manual