Wega Mininova Classic EMA 2GR Use And Maintenance Manual page 35

Periodic maintenance table
Component Type of operation
Keep checking the heating unit pressure which must be between 0.08 and 0.14 MPa
PRESSURE GAUGE
(0.8 and 1.4 bar).
Periodically check the water pressure when coffee is being dispensed: check the pressure
PRESSURE GAUGE
indicated on the gauge, which must be in the range of 0.8 to 0.9 MPa (8 and 9 bar).
Check the condition of the filters. Check for any damage on the edge of the filters and
FILTERS AND FILTER
check whether any coffee grounds settle in the coffee cup, and replace the filters and/
HOLDERS
or filter holders, as required.
Check the ground coffee dose (between 6 and 7 g each time) and the grind fineness.
Burrs must always have sharp cutting edges; too much powder in the grounds is an
GRINDER-DISPENSER indication that they are deteriorating. We recommend contacting the Technician to
replace the flat burrs after every 400/500 kg of coffee, or after every 800/900 kg for
conical burrs.
WATER SOFTENER Replace the water filter cartridge or replenish the water softener as often as specified by
FILTER the manufacturer.
We recommend calling out the Technician at least once every three months to replace
HEATING UNIT
the water in the heating unit.
Malfunctions and solutions table
Problem
NO MACHINE POWER
NO WATER IN THE
HEATING UNIT
TOO MUCH WATER IN THE
HEATING UNIT
STEAM NOZZLES DO NOT
RELEASE STEAM
WATER OR STEAM MIXED
WITH WATER
OF THE STEAM NOZZLES
NO BEVERAGES ARE BEING
DISPENSED
WATER LEAKS FROM
THE MACHINE
COFFEE IS TOO HOT OR TOO
COLD
COFFEE DISPENSING TOO FAST
COFFEE DISPENSING
TOO SLOWLY
THE COFFEE GROUNDS ARE WET
User MANUAL
Cause
The machine is switched off.
The water mains valve is shut off.
Electrical system or hydraulic system fault.
• The nozzle sprayer is clogged.
• The machine is switched off.
Electrical system or hydraulic system fault.
The water mains valve is shut off.
• The tray does not drain.
• The drain pipe is broken, has detached, or the
water flow is obstructed.
Electrical system or hydraulic system fault.
The coffee has been ground too coarsely.
The coffee has been ground too finely.
• The dispensing group is dirty.
• The dispensing group is too cold.
• The coffee has been ground too finely.
• The coffee is too old.
X
Action
Turn on the machine.
Open the water mains valve.
Turn off the machine and call out
the Technician.
• Clean the steam nozzle sprayer.
• Turn on the machine.
Turn off the machine and call out
the Technician.
Open the water mains valve.
• Check the sewer drain.
• Check and restore the drain pipe connection to
the tray.
Turn off the machine and call out
the Technician.
Adjust the coffee grinder.
Adjust the coffee grind.
• Wash the group with the blind filter.
• Wait for the group to fully heat up.
• Adjust the coffee grind.
• Replace with fresh coffee.
Mininova
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