Operation Manual

Maintenance manual for technical assistance - LB 2800 - LB 2810
Manual code 10066574 / Rel. 0.00 / March 2009
24
THE PUMP IS NOISY
INCORRECT
COFFEE DELIVERY
THE COFFEE
DOSE IS NOT MET
THE LED OF THE DOSE
BUTTON FLASHES
1) Install the pump-motor joint
2) Replace the seal and O-ring.
Take care not to change the
calibration of the valve
3) Align and tighten the compo-
nents which are loose
4) Clean the filter holder
5) Tighten the hex connection of
the pressure relief valve and
the filter
1) The pump and the motor are
not aligned
2) The seal or O-ring of the pres-
sure relief valve or the filter is
defective.
3) The joint, the coupling screw
or the V-shaped clamp is
loose.
4) The inlet is clogged, perhaps
only partially
5) The hex nut of the pressure
relief valve or the filter is loose
PROBLEM CAUSE
SOLUTION
1) Check for proper connection
of the volumetric dosing devi-
ce connector
2) Check for proper connection
of the 8-pin connector of the
electronic control unit
3) Remove the connector of the
volumetric dosing device and
thoroughly dry the contacts
4) Replace the heads of the
volumetric dosing device or
replace the dosing device
5) Check and replace the non-
return valve, if necessary
6) Check and replace the drain
valves, if necessary
7) Clean and replace the sole-
noid valve, if necessary
8) Clean or replace the volume-
tric dosing device
1) The connection of the volu-
metric dosing device is defec-
tive
2) The connection of the electro-
nic control unit is defective
3) The connector of the volume-
tric dosing device has humidi-
ty on it
4) The volumetric dosing device
is defective: during delivery
the dosing device LED does
not flash
5) The non-return valve loses
pressure (the dose is too
small)
6) The drain valves lose pressure
(the dose is too small)
7) Water leakage from the group
solenoid valve during coffee
delivery or when at rest
8) The volumetric dosing device
is partially obstructed