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Maintenance manual for technical assistance - LB 2800 - LB 2810
Manual code 10066574 / Rel. 0.00 / March 2009
23
COFFEE DISPENSED
TOO QUICKLY
COFFEE DISPENSED
TOO SLOWLY
THE PRESSURE GAUGE
INDICATES AN UNACCEP-
TABLE PRESSURE
GROUNDS IN CUP
THE PUMP FUNCTIONS
BELOW NOMINAL
CAPACITY
PROBLEM CAUSE
SOLUTION
1) Replace the injector with one
of a smaller diameter
2) Reduce the temperature in the
boiler
1
) The diameter of the injector is
too large
2) The boiler temperature is too
high
1) Replace the pressure gauge
2) Adjust the calibration of the
motor pump
1) The pressure gauge is defecti-
ve
2) Incorrect motor pump calibra-
tion.
1) Replace the injector
2) Check and clean the delivery
group
3) Clean and replace the filter
holders, if necessary
1) The injector is clogged
2) The delivery group is clogged
3) The filter holder is dirty
1) Clean the filter holder
2) Replace the lower perforator
3) Replace the seal
4) Check the causes and elimi-
nate the problem
1) The filter holder is dirty
2) The lower perforator holes are
worn
3) The undercup seal is worn
4) The temperature of the delive-
ry water is high
1) Clean the filter holder
2) Check the motor
3) Calibrate the pressure relief
valve
4) Check the voltage or replace
the motor
5) Replace the pump
1) The inlet is clogged, perhaps
only partially
2) The pump rotates in the
wrong direction
3) The pressure relief valve is not
properly calibrated
4) The motor runs at a low RPM
5) The inside of the pump is
damaged due to the infiltra-
tion of foreign matter
27


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