Wega EVD Use And Maintenance Manual

TECHNICIANS' manual 47 of 100
7.6 Malfunctions and solutions
Problem Cause Action
NO MACHINE POWER
• The general switch is in the "OFF" position.
• The machine switch is faulty.
• The mains switch is in the OFF position.
• The wiring is defective.
• Place the main switch in the "ON" position.
• Replace the main switch.
• Turn the mains switch to the ON position.
• Check for any faulty connections.
NO WATER IN THE
HEATING UNIT
• The water mains valve is shut off.
• The cut-off valve of the automatic level device
is closed.
• The pump lter is clogged.
• The motor pump is disconnected or jammed.
• The water lling solenoid valve is faulty.
• The water inlet solenoid valve lter is clogged.
• Open the water mains valve.
• Open the automatic level device valve.
• Replace the pump lter.
• Check the motor pump.
• Replace the water lling solenoid valve.
• Clean or replace the solenoid valve lter.
TOO MUCH WATER IN
THE HEATING UNIT
• The solenoid valve of the automatic level device
is faulty.
• The level probe is out of order (clogged by
lime-scale).
• Replace the solenoid valve of the automatic level
device.
• Replace the level probe.
WATER LEAKS FROM
THE MACHINE
• The tray is not draining.
• The drain pipe is broken, has detached, or the
water ow is obstructed.
• Water is leaking from the hydraulic circuit.
• Check the sewer drain.
• Check and restore the drain pipe connection to the
tray.
• Restore the hydraulic seal by replacing the pipe, the
gasket or the tting as necessary.
WATER LEAKS FROM THE
DISPENSING GROUP
• The group gasket is worn. • Replace the group gasket.
THE GAUGE INDICATES
A NON-CONFORMING
PRESSURE
• The pressure gauge is faulty.
• The pressure switch has been calibrated incorrectly.
• The motor pump has been calibrated incorrectly.
• Replace the pressure gauge.
• Adjust the pressure switch calibration.
• Adjust the motor pump calibration.
THE SAFETY VALVE
HAS CUT-IN
• The pressure transducer is broken.
• The electronic control unit is faulty.
• Check for correct operation of the pressure trans-
ducer. Replace the safety valve with an original
spare part only.
• Check that the electronic system is working prop-
erly.
STEAM DOES NOT COME
OUT OF THE NOZZLES
• The machine is switched off.
• The electrical heating element is faulty.
• The temperature probe is faulty.
• The nozzle sprayer is clogged.
• The safety thermostat is deactivated or faulty.
• Turn on the machine.
• Replace the electrical heating element.
• Replace the temperature probe.
• Clean the steam nozzle sprayer.
• Reactivate the thermostat or replace it.
WATER OR STEAM MIXED
WITH WATER COMES OUT
OF THE STEAM NOZZLES
• The level of the heating unit is too high due to
the level probe being incorrectly positioned inside
the heating unit or the presence of limestone.
• The heating unit lling solenoid valve is leaking.
• Check the condition of the level probe: check if it
is positioned correctly and check for any surface
lime-scale.
• C lean and replace the lling solenoid valve.
NO COFFEE IS DISPENSING
• There is no water in the mains.
• The group solenoid valve is faulty.
• The pump is jammed.
• The group solenoid valve is clogged or dirty.
• The group lter is clogged.
• The volumetric dosing device is jammed.
• The inlet and outlet valves of the dosing device
are closed.
• Check that there is water in the mains.
• Replace the group solenoid valve.
• Replace the pump.
• Clean or replace the solenoid valve.
• Clean or replace the lter.
• Check/replace the dosing device.
• Open the valves.

Wega EVD Specifications

General

Brand	Wega
Model	EVD
Category	Coffee Maker
Language	English