Wega 1GR Series, Руководство по эксплуатации и обслуживанию

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38
of
68
TECHNICIANS manual
Problem Cause Action
GROUNDS IN CUP
t The filter holder is dirty.
t The filter holes are worn.
t The coffee is not ground evenly.
t The seal under the pad is worn
t The pressure in the pump is too high.
t Clean the filter holder.
t Replace the filter.
t Replace the grinders.
t Replace the seal.
t Adjust the pressure of the pump
THE CUP IS DIRTY WITH SPLASHED
COFFEE
t Steam pockets in the dispensing system.
t
Air pockets in the hydraulic circuit.
t Coffee is ground too coarsely
t Reduce the water temperature.
t
Check the cause and eliminate the problem.
t Adjust the grinding suitably.
COFFEE IS TOO COLD
t The electrical heating element of the coffee boiler
is faulty.
t The wiring is faulty.
t Lime scale on the exchangers and/or heating ele-
ment.
t The pressure switch contacts are oxidized.
t The heating element protection thermostat inter-
vened.
t Machine switch in “1” position
t Lime scale has reduced the circulation of water.
t The dispensing group is cold.
t Replace the boiler's electrical heating element.
t
Check for any faulty connections.
t Clean the machine.
t
Clean the contacts or replace the pressure switch.
t Reset the heating element protection.
t
Place the machine switch in the "2" position
t Clean the connections of the exchanger, and clean
or replace the two circulation tubes
t Eliminate air pockets in the hydraulic circuit in the
following manner:
- disconnect the pump from the power supply;
- close the water tap of the softener;
- perform a dry dispensing run for a few minutes;
- connect the pump to the power supply;
- open the water outlet tap of the softener;
- dispense until water comes out;
- wait a few minutes for heating.
COFFEE IS TOO HOT
t
Boiler temperature is too high.
t
The flow reducer of the group is not suitable
t
Reduce the pressure in the boiler using the appropri-
ate screw on the pressure switch.
t
Replace the reducer with one of a smaller diameter.
COFFEE IS BEING DISPENSED TOO
QUICKLY
t
Coffee is ground too coarsely
t The diameter of the injector is too large.
t
The dose of ground coffee is too small.
t
Adjust the grinding of the coffee.
t
Replace the injector with one of a smaller diameter.
t Check the amount (grams) of the ground coffee you
are using.
COFFEE IS BEING DISPENSED TOO SLOWLY
t
Coffee is ground too finely.
t
The injector is clogged.
t
The dispensing group is clogged.
t
The filter holder is dirty.
t
Adjust the grinding of the coffee.
t
Replace the injector.
t
Check and clean the dispensing group.
t
Clean and replace the filters, if necessary.
EVD version:
SHUTDOWN OF THE ELECTRONIC SYSTEM
t
The control unit fuse is burned out.
t
One of the volumetric dispenser's contacts is
grounded.
t
Replace the main fuse (125 mA).
t
Check the connection of the volumetric dispenser.
EVD version:
COFFEE DISPENSING OCCURS ONLY USING
THE MANUAL BUTTON
t The control unit fuse is burned out.
t The coil of the solenoid valve does not work correctly
or has shorted out.
t Replace the control unit fuse (1A).
t Replace the coil of the solenoid valve.
EVD version:
SHUTDOWN OF THE ELECTRONIC SYSTEM
t The control unit fuse is burned out.
t One of the volumetric dispenser's contacts is
grounded.
t Replace the main fuse (125 mA).
t Check the connection of the volumetric dispenser.