Checks And Maintenance - Wega Mininova Use And Maintenance Manual For The Technician

When cleaning, always use cloths that are
completely clean and hygienic. To guarantee the
correct operation and hygiene of the hot beverages
dispenser, it is necessary to use the cleaning
methods and products suitable for this purpose.
Do not immerge the machine into water. Never use
alkaline detergents, solvents, alcohol or aggressive
!
substances. The descaling of the machine has
to be performed by specialized technicians, by
disassembling the components with deposits, so
that no descaling debris is put into circulation. The
used products/detergents have to be suitable for
this purpose and must not corrode the materials
of the hydraulic circuits.
Cleaning operations must not be made by children
without supervision.
No spills and water jets on the machine.
Technical manual
22

Checks and maintenance

To ensure perfect safety and efficiency of the machine
over time, it is necessary to carry out maintenance. In
particular, it is advisable to carry out an overall check
of the machine at least once a year.
Checks
MACHINE
Using the pressure gauge keep the boiler pressure
between 0,8 - 1,2 bar
DISPENSING UNIT
Every 4 months replace some
components of the group
( only original parts are recommended):
• containment ring (A)
• perforated disk (B)
In case of intensive use of the machine,
replace components
more frequently.
- Control amy HYDRAULIC LEAKS on the bench and
drains efficiency
VALVES
Check for proper operation of the negative pres-
sure valve, pressure limiting valve and non-return
drain valve. If, owing to failure, their replacement
becomes necessary, repeat the test with the new
valve installed.
NEGATIVE PRESSURE VALVE
1) first try :
• remove the top grill of the machine;
• use pliers to push the pin (5) downwards;
• if the pin does not move, it probably means the
valve is encrusted with limestone and must be
replaced.
2) second try :
• turn the machine off;
• open the steam valves and drain off
all the pressure from inside the boiler;
• turn the machine back on and check
for regular closure of the valve.
ROSSO
C:0 M:100 Y:100 K:0
NERO
C:0 M:0 Y:0 K:100
VERDE
C:100 M:0 Y:100 K:0
X X X
X
B
A
X
5
X
X
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