Wega Concept Use And Maintenance Manual page 33

COFFEE IS TOO HOT
COFFEE DISPENSED TOO QUICKLY
COFFEE DISPENSED TOO SLOWLY
WET COFFEE GROUNDS
THE DISPLAY INDICATES UNACCEPTABLE
PRESSURE
GROUNDS IN CUP
INCORRECT COFFEE DELIVERY
THE COFFEE DOSE IS NOT MET
THE LED OF THE DOSE BUTTON FLASHES
ALL THE LEDS OF ALL THE PUSH BUTTON
PANELS ARE FLASHING
Technical manual
• The set temperature for the coffee water is too
high.
• The set temperature of the group is too high.
• Coff ee is ground too coarsely.
• The dose of ground coff ee is too small.
• Coff ee is ground too fi nely.
• The delivery group is clogged.
• The fi lter holder is dirty.
• The group solenoid valve drain is clogged.
• The delivery unit is too cold
• Coff ee is ground too fi nely.
• There's not enough ground coff ee.
• The pressure transducer is faulty.
• Incorrect motor pump calibration.
• The fi lter holder is dirty.
• The fi lter holes are worn.
• The coff ee 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 deliv-
ery the dosing device, LED does not fl ash.
• The coff ee is ground too fi nely: there is not suffi cient
water fl ow 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
coff ee delivery or when in stand-by.
• The volumetric dosing device is partially ob-
structed.
After a few minutes, automatic water fi lling 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.
Wegaconcept
• Reduce the set coff ee water temperature.
• Reduce the group temperature.
• Adjust the grinding of the coff ee.
• Check the amount (weight) of the ground coff ee
you are using.
• Adjust the grinding of the coff ee.
• Check and clean the delivery group.
• Clean and replace the fi lters, if necessary.
• Clean the group drain.
• Modify the heating temperature of the group.
• Adjust the grinding of the coff ee.
• Increase the amount of ground coff ee.
• Replace the pressure transducer.
• Adjust the calibration of the motor pump.
• Clean the fi lter holder.
• Replace the fi lter.
• Replace the grinders.
• Replace the seal.
• Decrease the temperature of the groups and/or of
water used for coff ee 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 neces-
sary.
• 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.
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