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MALFUNCTION
COFFEE DISPENSED TOO QUICKLY
COFFEE DISPENSED TOO SLOWLY
WET COFFEE GROUNDS
THE DISPLAY INDICATES A PRESSURE
WHICH IS INCONSISTENT
GROUNDS IN CUP
INCORRECT COFFEE DELIVERY
THE COFFEE DOSE IS NOT MET
THE LED OF THE DOSE BUTTON FLASHES
ALL LEDS OF ALL THE PUSH BUTTON
PANELS ARE FLASHING
SHUTDOWN OF THE ELECTRONIC SYSTEM
THE PUMP LEAKS WATER
62
CAUSE
• Coffee is ground too coarsely
• The dose of ground coffee is too small.
• Coffee is ground too finely.
• The delivery group is clogged.
• The filter holder is dirty.
• The group solenoid valve drain is clogged.
• The delivery unit is too cold
• Coffee is ground too finely.
• There's not enough ground coffee.
• The pressure transducer is faulty.
• Incorrect motor pump calibration.
• The filter holder is dirty.
• The filter holes are worn.
• The coffee is not ground evenly.
• The seal under the pad is worn
• The temperature of the delivery water is high.
• The connection of the volumetric dosing device is
faulty.
• The connection of the electronic control unit is faulty.
• The connector of the volumetric dosing device has
humidity on it.
• The volumetric dosing device is faulty: during delivery
the dosing device, LED does not flash.
• The coffee is ground too finely: there is not sufficient
water flow in the dosing device.
• The non-return valve loses pressure (the dose is too
small).
• The drain valves lose pressure (the dose is too small).
• Water leakage from the group solenoid valve during
coffee delivery or when in stand-by.
• The volumetric dosing device is partially obstructed.
After a few minutes, automatic filling with water is
stopped:
• The device is in time-out.
• No water in mains.
• The tap for the automatic level device is closed.
• Some of the hoses in the circuit are clogged.
• The probe and/or the mass are disconnected.
• 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 filter is loose.
• The seal or O-Ring of the pressure relief valve or filter
is faulty.
SOLUTION
• Adjust the grinding of the coffee.
• Check the amount (weight) of the ground coffee you
are using.
• Adjust the grinding of the coffee.
• Check and clean the delivery group.
• Clean and replace the filters, if necessary.
• Clean the group drain.
• Modify the heating temperature of the group.
• Adjust the grinding of the coffee.
• Increase the amount of ground coffee.
• Replace the pressure transducer.
• Adjust the calibration of the motor pump.
• Clean the filter holder.
• Replace the filter.
• Replace the grinders.
• Replace the seal.
• Decrease the temperature of the groups and/or of
water used for coffee preparation
• Check for proper connection of the volumetric dosing
device connector.
• Check for proper connection of the 8-pin connector of
the electronic control unit.
• Remove the connector of the volumetric dosing device
and thoroughly dry the contacts.
• Replace the heads of the volumetric dosing device or
replace the dosing device.
• Adjust the grinding suitably and check the grinders,
if necessary.
• Check and replace the non-return valve, if necessary.
• Check and replace the drain valves, if necessary.
• Clean and replace the solenoid valve, if necessary.
• Clean or replace the volumetric dosing device.
• Turn the machine off and then back on.
• Open the water supply tap.
• Open the automatic level device tap.
• Check and replace the defective hoses.
• Check and restore the connections.
• 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 filter.
• Replace the seal and O-Ring, taking care not to change
the calibration of the valve.
Technical manual
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