Malfunctions And Relative Solutions - Wega MyConcept EVDP 2GR Use And Maintenance Manual

Malfunctions and solutions
10.6
Problem
MACHINE LACKING POWER
NO WATER IN BOILER
TOO MUCH WATER IN THE BOILER
WATER LEAKS FROM THE MACHINE
WATER LEAKS FROM THE DISPENSING
GROUP
THE DISPLAY INDICATES UNACCEPTABLE
PRESSURE
THE SAFETY VALVE STARTED OPERATING • The electronic control is faulty.
STEAM DOES NOT COME OUT OF NOZZLES
STEAM MIXED WITH WATER COMES OUT
OF THE STEAM SPOUTS
NO COFFEE DISPENSING
WET COFFEE GROUNDS
GROUNDS IN CUP
THE CUP IS DIRTY WITH SPLASHED
COFFEE
54 76
of
Cause
• The general switch is in the "OFF" position
• The machine switch is defective
• The mains power supply switch is in the OFF position.
• The wiring is defective
• The water supply tap is closed.
• The cut-off tap of the automatic level device is closed.
• The pump filter is clogged.
• The motor pump is disconnected or jammed.
• The water filling solenoid valve is defective.
• The water inlet solenoid valve filter is clogged.
• The solenoid valve of the automatic level device is
defective
• The level probe is out of order (clogged by lime scale)
• The pad does not drain.
• The drain pipe is broken or detached or the water
flow is obstructed.
• Hydraulic leaks in the hydraulic circuit.
• Worn under cup seal
• The display is faulty.
• Incorrect motor pump calibration.
• The machine is off.
• The electrical heating element is faulty.
• The temperature probe is faulty.
• The nozzle sprayer is clogged.
• Safety thermostat deactivated or faulty.
• The level of the boiler is too high due to an incorrect
location of the level probe in the boiler or due to the
presence of limestone.
• Leakage from boiler filling solenoid valve.
• No water supply.
• The group solenoid valve is faulty.
• The pump is jammed.
• The group solenoid valve is clogged or dirty.
• The group filter is clogged.
• The volumetric dispenser is blocked.
• The inlet and outlet taps of the dispenser are closed.
• The output JET of the volumetric dispenser is dirty.
• The group solenoid valve drain is clogged.
• The dispensing group is too cold
• Coffee is ground too finely.
• There's not enough ground coffee.
• The filter holder is dirty.
• The filter holes are worn.
• The coffee is not ground evenly.
• The seal under the pad is worn
• The pressure in the pump is too high.
• Steam pockets in the dispensing system.
• Air pockets in the hydraulic circuit.
• Coffee is ground too coarsely
Action
• Place the main switch in the ON position.
• Replace the main switch.
• Place the main switch in the ON position.
• Check for any faulty connections.
• Open the water supply tap.
• Open the automatic level device tap.
• Substitute the pump filter.
• Check the motor pump.
• Replace the water filling solenoid valve.
• Clean or replace the filter of the solenoid valve.
• Replace the solenoid valve of the automatic level
device.
• Replace the level probe.
• Check the sewer drain.
• Check and restore the connection of the drain pipe
to the pad.
• Restore the hydraulic seal by replacing the pipe, the
gasket or the fitting as necessary.
• Replace the seal.
• Replace the display.
• Adjust the calibration of the motor pump.
• Check for proper operation of the electronic system.
• Turn on the machine.
• Replace the boiler's electrical heating element.
• Replace the temperature probe.
• Clean the steam nozzle sprayer.
• Reactivate the thermostat or replace it.
• Check the status of the level probe: check if it is posi-
tioned correctly and check for any surface lime scale.
• Clean and replace the filling solenoid valve.
• 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 filter.
• Check/replace the dispenser.
• Open the taps.
• Clean or replace the jet.
• Clean the group drain.
• Wait for unit to heat up completely.
• Adjust the grinding of the coffee.
• Increase the amount of ground coffee.
• Clean the filter holder.
• Replace the filter.
• Replace the grinders.
• Replace the seal.
• Adjust the pressure of the pump
• Reduce the water temperature.
• Check the cause and eliminate the problem.
• Adjust the grinding suitably.
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