NECTA SPA TECHNICAL MANUAL “COLIBRÌ”
Service Manual: Colibrì
Edition 02-2002
19 /25
11 - TROUBLE-SHOOTING
Problem
(And/or indication on the display)
Possible cause
Solution
The machine does not go
into the boiler heating
phase, remaining in the
“installation”
phase
No water flow from the
mains or insufficient pressure
(5-85 N/cm
2
)
(0,5-8,5 bar)
The air-break microswitch is
faulty
Water inlet solenoid valve
locked by the overflow tube
and activated by the relevant
relay
Check for the presence of one or more of the situations
indicated and once identifying the cause do as follows:
Short-circuit the microswitch to check it’s functioning
Unlock the water inlet valve, undoing the threaded ring and
emptying the overflow tube
Check for 230 V AC voltage at the solenoid valve power
supply ends
Check the activation of relay K 12
The display indicates the
message
“No coffee”
The grinder motor is locked
because there is no coffee
The grinder wheels are
locked because of foreign
matter in the coffee
Grinder motor overheating
device triggered
The coffee container shutter
was not opened
When an espresso coffee selection is made the grinder is
activated conveying coffee to the doser device, the motor
lock is activated by the microswitch, which is triggered when
the set dose is reached. If such microswitch is not triggered,
the system disables all espresso coffee selections, indicating
the message “No coffee” on the display, once identifying the
cause:
Check the wear of the brushes
Free the grinder wheels with the utmost care, as blocked
wheels could have triggered the overheating protection,
which is reset-able. Open the shutter, add coffee
The display indicates the
message
“Coffee release failure”
Failure to the release magnet
Failure to the coffee dose
microswitch<0}
Failure to relay K 02
After grinding and during the attempt of releasing the ground
coffee, the doser device plate triggers a microswitch that
signals the coffee release
If such microswitch is not triggered, there could have been
two causes:
Failure to the release magnet or overheating protection
triggered (resetting is automatic, and after approximately 5
minutes it is reactivated, but the cause of such trigger must
be identified).
Failure to the microswitch: replace with an identical one
designed for the Colibrì, in the event of using a microswitch
with different characteristics considerable discrepancies in the
ground coffee doses may occur.
The display indicates the
message
“Boiler failure”
The boiler does not heat
Dry operation protection
system triggered.
The machine is locked if after 10 minutes heating the set
temperature is not reached.
Check for the correct operation of the heating element, the
thermostat, the probe and of the actuation triac.
In the event of replacing the probe, the correct temperature
must be re-adjusted using the trimmer
The display indicates the
message
“No cups”
No cups in the dispenser
Microswitch failure
The cup column does not
rotate
If no cups were loaded when starting the machine, the
column rotation ratiomotor is activated to search for a full
column and if no cups are found within a 60 sec “time-out”,
indicated by the specific microswitch, the machine is locked.
Excluding the fact of a real lack of cups, the correct
microswitch functioning must be checked and in the event of
failure they must be replaced with identical characteristic
microswitches.
If the ratiomotor is locked, the correct actuation of relays K
21 and K 23 must be checked.
The display indicates the
message
“Espresso unit”
The espresso unit failed to
reposition.
Failure to the lower dead
centre positioning
microswitch.
Failure to relay K 03
Check for the correct operation of the lower dead centre
positioning microswitch.
Check that the unit stops correctly at the upper dead centre
(monitored via SW). If not replace the EPROM (programming
may be necessary).
The display indicates the
message
“
Volumetric counter
”
(flow-meter)
The coffee dose is not
reached within 60 sec.
(The volumetric counter in
the Colibrì Instant model is
used to measure also the
instant product doses).
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 a sensor that 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
