Wega ALE Series Use And Maintenance Manual page 39

Problem
EVD version:
COFFEE DISPENSING IS NOT
CONFORMANT
THE COFFEE DOSE IS NOT MET
THE LED OF THE DOSE BUTTON FLASHES
EVD version:
ALL LEDS OF ALL THE PUSH BUTTON
PANELS ARE FLASHING
EPU version:
THE FRONT LED IS FLASHING
NON-UNIFORM MILK DISPENSING FROM
THE CAPPUCCINO MAKER
AIR POCKETS IN THE MILK FOAM FROM
THE CAPPUCCINO MAKER
THE PUMP WORKS ONLY WITH THE
MANUAL DISPENSING BUTTON
COFFEE DISPENSING IS NOT
CONFORMANT
THE COFFEE DOSE IS NOT MET
BUBBLES IN MILK FROTH
If the problem cannot be solved, turn the machine off and contact
the Manufacturer.
TECHNICIANS manual
Cause
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 dispenser is faulty: the LED does not
flash during dispensing.
The coffee is ground too finely: there is not sufficient
water flow in the dispenser.
The non-return valve loses pressure (the dose is
too small).
The expansion valves lose pressure (the dose is too
small).
Water leakage from the group solenoid valve during
coffee dispensing or when in stand-by.
The volumetric dosing device is partially obstructed.
After a few minutes, automatic water filling is stopped.
The device is in time-out.
There is no water in the 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.
Out of milk.
Milk injector obstructed.
Cappuccino maker obstructed.
Suction pipe clogged.
Silicone tube detached.
Air regulator too open.
Air aspiration tube disconnected from the cappuc-
cino maker.
The pump fuse of the electronic control unit is
burned out.
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 dispens-
ing the dosing device LED does not flash.
The coffee is ground too finely: there is not sufficient
water flow in 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.
Air regulator too open.
Air aspiration tube disconnected from the cappuc-
cino maker.
Excessive temperature in foamed milk.
Action
Check for proper connection of the volumetric dosing
device connector.
Check for proper connection of the 8/10-pin connec-
tor 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 expansion 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.
Refill milk.
Clean the milk injector.
Clean the cappuccino maker with the brush.
Clean the milk suction hose.
Connect the hose correctly.
Properly calibrate the air regulator.
Restore the connection through the hose.
Replace the pump fuse of the electronic control
unit (10A).
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.
Adjust the grinding suitably and check the grinders,
if necessary.
Clean and replace the solenoid valve, if necessary.
Clean or replace the volumetric dosing device.
Properly calibrate the air regulator.
Restore the connection through the hose.
Reduce the temperature of the foamed milk, in-
crease the speed of the milk pump.
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