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Lavazza LB 2810 Manual

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Maintenance manual for technical assistance - LB 2800 - LB 2810
Manual code 10066574 / Rel. 0.00 / March 2009
21
SHUTDOWN OF
THE ELECTRONIC
SYSTEM
THE PUMP
LEAKS WATER
THE MOTOR STOPS
SUDDENLY OR
THE THERMAL
PROTECTOR
INTERVENES DUE
TO OVERLOAD
THE CUP IS DIRTY WITH
SPLASHED COFFEE
PROBLEM CAUSE
SOLUTION
1) Check the status of the pump
and take any corrective action
which may be required
2) Tighten the connections
3) Tighten the hex connection of
the pressure relief valve and
the filter
4) Replace the seal and O-ring.
Take care not to change the
calibration of the valve
1) Poor mechanical seal of the
shaft or the O-ring seal
2) The inlet and outlet connec-
tions are loose
3) The hex nut of the pressure
relief valve or the filter is loose
4) The seal or O-ring of the pres-
sure relief valve or the filter is
defective.
1) Replace the main fuse (125
mA)
2) Check the connection of the
volumetric dosing device
1
) The control unit fuse is bur-
ned out
2) The volumetric dosing device
has a contact between the
positive pole and earth
1) Check the status of the pump
and replace it, if necessary
2) Install the pump-motor joint
3) Replace the motor
4) Ensure that the power supply
voltage of the motor is correct
1) Lime scale and mineral build-
ups in the pump have caused
it to jam
2) The pump and the motor are
not aligned
3) The motor is defective
4) The motor is connected with a
incorrect voltage
1) Steam pockets in the delivery
system
2) Air pockets in the hydraulic
circuit
3) The flow reducer of the group
is unsuitable
1) Reduce the water temperature
2) Check the cause and elimina-
te the problem
3) Replace the flow reducer
… 25 …


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