Wega WBAR EVD User Manual

TECHNICIANS' manual
- English -
38 di 52
Problem Cause Action
GROUNDS FOUND IN CUPS
• The filter holder is dirty.
• The filter holes are worn.
• The coee has not been ground evenly.
• The group gasket is worn.
• The pump pressure is too high.
• Clean the filter holder.
• Replace the filter.
• Replace the grinders.
• Replace the seal.
• Adjust the pump pressure.
THE CUP IS DIRTY WITH
SPLASHES OF COFFEE
• There are steam pockets in the dispensing
system.
• There are air pockets in the hydraulic circuit.
• The coee has been ground too coarsely.
• Reduce the water temperature.
• Check the cause and resolve the problem.
• Adjust the grinder as appropriate.
THE COFFEE IS TOO COLD
• The heating element of the coee heating
unit is faulty.
• The wiring is faulty.
• There is limescale on the exchangers and/or
heating element.
• The pressure switch contacts are oxidised.
• The heating element protection thermostat
has cut-in.
• Machine switch in “1” position
• In the CTS system, the lime scale has reduced
the circulation of water
• The dispensing group is cold.
• Replace the electrical heating element.
• Check for any faulty connections.
• Clean the machine.
• Clean the contacts or replace the pressure
switch.
• Reset the safety heating element.
• Turn the machine switch to position "2".
• Clean the exchanger connections, and clean or
replace the two circulation pipes.
• Eliminate air pockets in the hydraulic circuit in
the following manner:
• Disconnect the pump from the power supply.
• Close the softener’s water valve.
• Perform a dry dispensing run for a few min-
utes.
• Reconnect the pump to the power supply.
• Open the softener’s water outlet valve.
• Dispense until water comes out.
• Wait a few minutes for it to heat up.
THE COFFEE IS TOO HOT
• The heating unit temperature is too high.
• The group’s flow reducer is not suitable.
• Reduce the pressure in the heating unit using
the appropriate screw on the pressure switch.
• Replace the reducer with one of a smaller di-
ameter.
COFFEE IS BEING DISPENSED
TOO QUICKLY
• The coee has been ground too coarsely.
• The diameter of the injector is too big.
• The dose of ground coee is too small.
• Adjust the coee grinder.
• Replace the injector with one that has a
smaller diameter.
• Check the amount (grams) of ground coee
being used.
COFFEE IS BEING DISPENSED
TOO SLOWLY
• The coee has been ground too finely.
• The injector is clogged.
• The dispensing group is clogged.
• The filter holder is dirty.
• Adjust the coee grinder.
• Replace the injector.
• Check and clean the dispensing group.
• Clean and replace the filters, if necessary.
THE ELECTRONIC SYSTEM HAS
SHUTDOWN
• The control unit main fuse has burned out.
• One of the volumetric dosing device's contacts
is grounded.
• Replace the main fuse (125 mA).
• Check the volumetric dosing device connec-
tion.
COFFEE IS ONLY DISPENSING
VIA THE MANUAL BUTTON
• The control unit fuse is burned out.
• The solenoid valve coil is malfunctioning or
has shorted.
• Replace the control unit fuse (1A).
• Replace the coil of the solenoid valve.

Wega WBAR EVD Specifications

General

Brand	Wega
Model	WBAR EVD
Category	Coffee Maker
Language	English