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TECHNICIANS manual
10.
MAINTENANCE AND CLEANING
10.1
Safety precautions
Carefully read the instructions provided in chapter "I. SAFETY
PRECAUTIONS" on page 3.
10.2
PPE features
When maintaining and cleaning the machine, the
following PPE is required:
The use of protective gloves is mandatory
10.3
Maintenance
10.3.1 Scheduled maintenance
Carry out scheduled maintenance according to the
instructions in the table below.
If the machine is used intensively, the checks need to
be performed more frequently. The envisaged operations
are outlined in the following pages.
Component
Type of operation
Weekly
Quarterly Yearly
PRESSURE TRANSDUCER
•
Check the heating unit pressure, which must be between 0.8 and 1.4 bar.
•
Check the water pressure when coffee is being dispensed: check the pressure
indicated on the gauge, which must be between 8 and 9 bar.
X
FILTERS AND FILTER
HOLDERS
Check the condition of the filters. Check for any damage on the edge of the filters
and check whether any coffee grounds settle in the coffee cup, and replace the filters
and/or filter holders, as required.
X
DISPENSING GROUP
Replace the shower screen and group gasket as indicated in para. "10.3.4 Dispensing
group maintenance" on page 60.
X
WATER FILTER
Replace the water filter cartridge at the frequency indicated by the manufacturer.
If limescale has formed in the hydraulic circuit, the filter will need to be replaced.
X
WATER SOFTENER
Carry out the regeneration as instructed by the manufacturer.
Take care in areas where the water is very hard. The water will need to be regener-
ated more frequently, especially if the machine is used intensively.
X
GRINDER-DISPENSER
•
Check the ground coffee dose (around 7 grams each time) and check the degree
of grinding. The grinders must always have sharp cutting edges. There will be too
much powder in the grounds when they are deteriorating.
•
We recommend calling out the Maintenance Technician to replace the flat grinders
after every 400/500 kg of coffee, or after every 800/900 kg for conical grinders.
•
If the automatic grinder wear warning is enabled, follow the instructions in para.
"8.3.5 Maintenance report" on page 41.
X
HEATING UNIT
Replace the water in the heating unit as indicated in para. 6.6 on page 32.
X
HEATING UNIT
•
Replace the electric heating element if it becomes faulty or malfunctions.
•
Do not replace the heating element with a more powerful one. Before making any
changes, please contact the Manufacturer.
•
If the thermostat of the heating element is triggered, reset it by pressing the central
button of the thermostat. However, before starting the machine up again, check
what caused the problem.
•
If the heating unit insulation needs to be removed, restore the insulation after the
maintenance work has been completed.
•
Remove and clean the heating unit level probes.
•
Check whether there is any limescale build-up on the heating element.
•
If there is a lot of limestone build-up, this indicates that the water filter has not
been replaced, or that the softener has not been regenerated.
•
When replacing any components, always replace the relative gasket as well.
X
Summary of Contents for 2GR
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