NECTA SPA TECHNICAL MANUAL “BRIO 250”
Service Manual: Brio 250
Edition 02-2002
22
/ 27
The display indicates
the message
“Volumetric counter”
(flow-meter)
The coffee dose is not reached
within 60 sec.
The water amount for both espresso coffee and instant drink
selections is ensured by a volumetric counter; with the water
flow a wheel rotates and through sensors sends a number of
pulses corresponding to the water dose programmed in the
SW. If such dose is not reached within 60 sec. it means that
there is a problem:
Check for the correct functioning of the volumetric counter;
there must be 5 V AC on the terminals during the counter
operation.
Check that coffee is not ground too fine and the dose
excessive.
Check for clogging in the coffee filters.
The display indicates
the message
“Air-break failure”
No water from the mains.
Faulty air-break microswitch
Failure to the float actuation
system.
If in the period taken to make 6 selections with any dose the
microswitch controlled by the air-break float is not triggered
The vending machine is locked for air-break failure.
The malfunction could occur for lack of water from the
mains, or because of a failure to the float microswitch
system.
Replace the microswitch with one having the same
characteristics, otherwise other malfunctions may occur.
The display indicates
the message
“RAM data”
Wrong RAM data, which must be
retrieved by initialising the EPROM.
Enter into the installation procedure and initialise the
software; if the failure persists replace the CPU.
The display indicates
the message
“Water failure”
Models with water supply from the
mains:
If the air-break microswitch is
closed for more than a minute.
Models with water supply from an
internal tank:
If the water level is less than 300
c.c.
Check the water inlet solenoid valve.
Check for the correct actuation of relay K 12.
Check the air-break microswitch.
Check the tank float microswitch.
The coffee lacks body
and cream and is
dispensed too
quickly
Excessively coarse grinding.
Insufficient ground coffee dose.
Inspect the grade of grinding, keeping in mind that it takes
between 15 and 20 seconds to dispense optimum espresso
coffee.
A shorter time means that the grade of grinding is too
coarse.
With wear the grinding wheels must be adjusted regularly.
Check the coffee dose, weighing it at least for 5 consecutive
doses; the average weight must be between 6.5 and 7
grams.
Coffee is dispensed too
slowly
and it tastes
burnt
Excessive coffee dose.
Grinding too fine.
Faulty pump by-pass.
Clogged coffee filters.
Inspect the grade of grinding, keeping in mind that it takes
between 15 and 20 seconds to dispense optimum espresso
coffee.
A longer time means that the grade of grinding is too fine.
Adjust the grinding wheels.
Check the coffee dose, weighing it at least for 5 consecutive
doses; the average weight must be between 6.5 and 7
grams.
The by-pass is set from the factory to trigger at 12 bars.
Lower settings will lengthen the dispensing time and make
less cream.
Replace the coffee filters.
The mixers
clog up
The whipper failed to rotate.
Powder removal drawer full.
Insufficient water to powder ratio.
Check for the motor overheating protection trigger, if
necessary check the cause of such trigger.
Empty the powder removal drawer.
Check / adjust the water to powder ratio.
The display indicates
the message
“Coin mech. failure”
In the case of serial communication
kit, if there is no communication for
more than 30 sec.
Check for correct connections, correct insertion of the
protocol card, and SW settings.
The display indicates
the message
“Water leak”
If water is drawn from the air-break
without a selection being made (or
wash cycle) the SW stops the mains
inlet solenoid valve to avoid any
flooding.
Such control serves the purpose of preventing water leaks in
the hydraulic system that could quickly fill the liquid waste
container; as there is no HW control of such situation,
carefully check the hydraulic system to find any leaks.