Malfunctions And Related Solutions - Wega LB 4200 CAFFE’-CAFFE’ Use And Maintenance Manual

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Malfunctions and related solutions

INDICATION CAUSE
• The machine switch is in the "OFF" position
MACHINE LACKING
• The machine switch is broken
POWER
• The wiring is defective
• There is no water in the internal tank
NO WATER IN BOILER • The vibration pump is disconnected or jammed.
• The water filling solenoid valve is defective
• The boiler filling solenoid valve is broken
TOO MUCH WATER IN
• The boiler filling solenoid valve is stays on
THE BOILER
• The nozzle sprayer is clogged
STEAM DOES NOT COME
OUT OF THE NOZZLE
• Machine switch in "OFF" position
STEAM MIXED WITH
WATER COMES OUT OF • The boiler level is too high
THE NOZZLES
• There is no water in the internal tank
• The group solenoid valve is clogged or broken
NO DELIVERY
• The vibration pump is jammed
• The volumetric dosing device is blocked
• The drainage tray is full
• The drain pipe is broken or detached or the water flow is
WATER LEAKS FROM
THE APPLIANCE obstructed.
• Leaks in the hydraulic circuit.
• The temperature of the unit or boiler is too low
• The unit's electrical heating element is defective
• The wiring is faulty
• Lime scale on the exchangers and/or boiler heating element
• The heating element protection thermostat intervened
COFFEE IS TOO COLD
• Machine switch in "OFF" position
• Lime scale has reduced the circulation of water
• The dispensing unit is cold
COFFEE DISPENSED
• Boiler temperature is too high
TOO QUICKLY
COFFEE DISPENSED
• The dispensing unit is clogged
TOO SLOWLY
instructions for the user
SOLUTION
• Place the machine switch in the "ON" position
• Replace the main switch.
• Check for any faulty connections
• Fill the internal tank with water
• Check the vibration pump
• Replace the water filling solenoid valve
• Replace the boiler filling solenoid valve
• Check the level probe, the earth of the frame and
the operation of the electronic control unit
• Clean the steam nozzle sprayer
• Place the machine switch in the "ON" position
• Check the status of the level probe: check if it is positioned
correctly and check for any surface lime scale
• Fill the internal tank with water
• Clean or replace the unit solenoid valve
• Replace the vibration pump
• Check or replace the dosing device
• Carry out the bleeding and stabilization procedure as
described in par. 7.2
• Drain the pan
• Check and restore the connection of the drain pipe to the pan
• Identify and eliminate any hydraulic leaks
• Change the temperature of the unit and/or boiler
• Replace the unit's electrical heating element
• Check for any faulty connections
• Clean the machine
• Reset the heating element protection
• Place the machine switch in the "ON" position
• Clean the connections of the exchanger, and clean or replace
the circulation tubes
• Wait a few minutes for the entire heating of the machine and
then make some empty runs.
• Perform the descaling
• Modify the boiler temperature
• Check and clean the dispensing unit
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