La Marzocco Linea PB, Operating Manual

Page: 17 / 64

EN
16
8. Mandatory Maintenance and Check-up Operations
EVERY THREE/FOUR MONTHS
▪ Replace group gaskets
▪ Replace diffuser screens
▪ Clean auto-fill probe
▪ Check vacuum breaker for proper
operation
▪ Inspect water inlet valve
▪ Inspect drain system for leaks or clogs
▪ Check flow rate for each group
▪ Check brew temperature
▪ Check that brew pressure is at 9bar
▪ Check all switches for proper operation
▪ Check/note water hardness
(Water quality must be within the range
of parameters specified in the chapter on
Installation, otherwise warranty is voided)
▪ Check filter basket condition
> If AV Model:
▪ Check shot volumes
▪ Test flowmeter’s ohm value (ohm value is
acceptable if greater than 1.8 K ohm, and less
than 2.2 K ohm
> If MP Model:
▪ Check the seal of the MP valve gasket
EVERY SIX/EIGHT MONTHS
(in addition to all other instructions)
▪Rebuild steam assemblies
EVERY YEAR
(in addition to all other instructions)
▪ Replace portafilter baskets
▪ Inspect group valve plungers
▪ Inspect vacuum breaker
▪ Inspect steam boiler pressurestat
▪ Inspect contactor
▪ Inspect expansion valve
▪ Inspect electrical wiring condition
▪ Inspect boilers safety switches
▪ Replace over-pressure valve (safety valve)
> If MP Model
(in addition to all other instructions)
▪ Rebuild MP valve
EVERY 3 YEARS
(in addition to all other instructions)
▪ Check the condition of the inside of boilers
and if necessary rinse out with a proper
cleaning product allowed for food and
beverage appliances.
These operations are in addition to the Maintenance and Periodic Cleaning Operations as
specified in Chapter 7.
The following maintenance and check-up operations sould be carried out by a qualified
technician.
The time required for the periodic maintenance is determinated by the quantity of daily work
and/or coffee consumption.
N.B. These periodic maintenance operations are not covered by warranty.