Wega EVD Use And Maintenance Manual

TECHNICIANS' manual 49 of 100
Problem Cause Action
EVD version:
COFFEE IS BEING
DISPENSED INCORRECTLY
THE COFFEE DOSE
IS NOT CORRECT
THE DOSE BUTTON
LED IS FLASHING
• The volumetric dosing device connection is faulty.
• The electronic control unit connection is faulty.
• The volumetric dosing device connector is wet.
• The volumetric dosing device is faulty: the LED
does not ash during the dispensing process.
• The coffee has been ground too nely: there
isn't enough water ow in the dosing device.
• The non-return valve is losing pressure (the dose
is too small).
• The expansion valves are losing pressure (the
dose is too small).
• Water is leaking from the group solenoid valve
when coffee is being dispensed or when in standby.
• The volumetric dosing device is partially obstructed.
• Check that the volumetric dosing device connec-
tor has been connected properly.
• Check that the connector (8/10 poles) has been
connected correctly to the electronic control unit.
• Remove the volumetric dosing device connector
and thoroughly dry the contacts.
• Replace the heads of the volumetric dosing device
or replace the whole dosing device.
• Suitably adjust the grind and check the grinders,
if necessary.
• Check and replace the non-return valve, if necessary.
• Check and replace the expansion valves, if necessary.
• Clean and replace the solenoid valve, if necessary.
• Clean or replace the volumetric dosing device.
EVD version:
THE LEDS OF ALL THE
PUSHBUTTON PANELS
ARE FLASHING
EPU version:
THE FRONT LED
IS FLASHING
• The water stops being automatically lled after a
few minutes.
• The timeout device has cut in.
• There is no water in the mains.
• The automatic level device valve is closed.
• Some of the hoses in the circuit are clogged.
• The probe and/or the mass are disconnected.
• Turn the machine off and then back on.
• Open the water mains valve.
• Open the automatic level device valve.
• Check and replace the faulty hoses.
• Check and restore the connections.
UNEVEN AMOUNTS
OF MILK ARE
DISPENSING FROM THE
CAPPUCCINO MAKER
• The milk has run out.
• The milk injector is clogged.
• The cappuccino maker is clogged.
• The suction hose is clogged.
• The silicone tube is detached.
• Rell the milk.
• Clean the milk injector.
• Clean the cappuccino maker with the brush.
• Clean the milk suction hose.
• Connect the hose correctly.
THERE ARE AIR POCKETS
IN THE MILK FROTH FROM
THE CAPPUCCINO MAKER
• The air regulator is open too much.
• The air suction hose is disconnected from the cappuc-
cino maker.
• Properly calibrate the air regulator.
• Restore the connection via the hose.
THE PUMP WORKS ONLY
WITH THE MANUAL
DISPENSING BUTTON
• The pump fuse of the electronic control unit is
burned out.
• Replace the pump fuse of the electronic control
unit (10A).
COFFEE IS BEING
DISPENSED INCORRECTLY
THE COFFEE DOSE
IS NOT CORRECT
• The volumetric dosing device connection is
faulty.
• The electronic control unit connection is faulty.
• The volumetric dosing device connector is wet.
• The volumetric dosing device is faulty: during
dispensing the dosing device LED does not ash.
• The coffee has been ground too nely: not
enough water is owing into the dosing device.
• Water leakage from the group solenoid valve
during coffee dispensing or when in stand-by.
• The volumetric dosing device is partially obstructed.
• Check that the volumetric dosing device connec-
tor has been connected properly.
• Check for proper connection of the electronic
control unit connector.
• Remove the volumetric dosing device connector
and thoroughly dry the contacts.
• Replace the heads of the volumetric dosing de-
vice or replace the whole dosing device.
• Suitably adjust the grind and check the grinders,
if necessary.
• Clean and replace the solenoid valve, if necessary.
• Clean or replace the volumetric dosing device.
BUBBLES IN THE
FROTHED MILK
• The air regulator is open too much.
• The air suction hose is disconnected from the
cappuccino maker.
• The frothed milk is too hot.
• Properly calibrate the air regulator.
• Restore the connection via the hose.
• Reduce the temperature of the frothed milk, in-
crease the speed of the milk pump.

Wega EVD Specifications

General

Brand	Wega
Model	EVD
Category	Coffee Maker
Language	English