Astoria 1GR Use And Maintenance Manual page 51

Problem
THE COFFEE GROUNDS ARE WET
GROUNDS FOUND IN CUPS
THE CUP IS DIRTY WITH
SPLASHES OF COFFEE
THE COFFEE IS TOO COLD
THE COFFEE IS TOO HOT
COFFEE IS BEING DISPENSED TOO
QUICKLY
COFFEE IS BEING DISPENSED TOO
SLOWLY
SAE version:
THE ELECTRONIC SYSTEM HAS
SHUTDOWN
SAE version:
COFFEE IS ONLY DISPENSING VIA
THE MANUAL BUTTON
TECHNICIANS' manual
Cause
• The group solenoid valve drain is clogged.
• The dispensing group is too cold.
• The coffee has been ground too finely.
• There's not enough ground coffee.
• The filter holder is dirty.
• The filter holes are worn.
• The coffee has not been ground evenly.
• The group gasket is worn.
• The pump pressure is too high.
• There are steam pockets in the dispensing
system.
• There are air pockets in the hydraulic circuit.
• The coffee has been ground too coarsely.
• The heating element of the coffee 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.
• The heating unit temperature is too high.
• The group's flow reducer is not suitable.
• The coffee has been ground too coarsely.
• The diameter of the injector is too big.
• The dose of ground coffee is too small.
• The coffee has been ground too finely.
• The injector is clogged.
• The dispensing group is clogged.
• The filter holder is dirty.
• The control unit main fuse has burned out.
• One of the volumetric dosing device's con-
tacts is grounded.
• The control unit fuse is burned out.
• The solenoid valve coil is malfunctioning or
has shorted.
Action
• Clean the group drain.
• Wait until the group has fully heated up.
• Adjust the coffee grinder.
• Increase the amount of ground coffee.
• Clean the filter holder.
• Replace the filter.
• Replace the grinders.
• Replace the seal.
• Adjust the pump pressure.
• Reduce the water temperature.
• Check the cause and resolve the problem.
• Adjust the grinder as appropriate.
• 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 minutes.
• 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.
• Reduce the pressure in the heating unit using
the appropriate screw on the pressure switch.
• Replace the reducer with one of a smaller diameter.
• Adjust the coffee grinder.
• Replace the injector with one that has a smaller
diameter.
• Check the amount (grams) of ground coffee
being used.
• Adjust the coffee grinder.
• Replace the injector.
• Check and clean the dispensing group.
• Clean and replace the filters, if necessary.
• Replace the main fuse (125 mA).
• Check the volumetric dosing device connec-
tion.
• Replace the control unit fuse (1A).
• Replace the coil of the solenoid valve.
53 108
of