46
instructions for the user
!
If the problem cannot be resolved, turn the machine o and call for Technical Assistance. Do not attempt any sort of repairs.
The descaling of the machine must be carried out by professional technicians to ensure that such operation does not lead to
release of hazardous materials for food use.
INDICATION CAUSE SOLUTION
GROUNDS IN CUP • The temperature of the delivery water is high • Change the temperature of the unit and/or boiler
INCORRECT COFFEE
DELIVERY
THE COFFEE DOSE IS
NOT MET
• 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 ash
• 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 coee
delivery or when in stand-by
• The volumetric dosing device is partially obstructed
• Check for proper connection of the volumetric dosing device
connector
• Check for proper connection of the electronic control unit
connector
• 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
• 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
THE VIBRATION PUMP
FUNCTIONS BELOW
NOMINAL CAPACITY
• The inlet is clogged, perhaps only partially
• The inside of the pump is damaged due to the inltration of
foreign materials
• Clean the tank lter and the water through lters
• Replace the vibration pump
THE CUP IS DIRTY WITH
SPLASHED COFFEE
• Steam pockets in the delivery system
• Air pockets in the hydraulic circuit
• Decrease the temperature of the unit and/or boiler
• Perform some empty runs
DOSE VOLUME
DIFFERENT FROM THE
ONE PROGRAMMED
• Air pockets in the hydraulic circuit • Bleed as shown in chap. 7.2
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