Maintenance manual for technical assistance
25
Manual code 10066846 / Rel. 0.00 / March 2012
PROBLEM
CAUSE
SOLUTION
The pressure gauge indicates an
unacceptable pressure
The pressure gauge is defective.
Replace the pressure gauge.
The boiler calibration is incorrect.
adjust the calibration of the boiler.
The power-pump calibration is incorrect.
adjust the calibration of the power-
pump.
Grounds in cup
The capsule-holder is dirty.
clean the capsule-holder.
The lower perforator holes are worn.
Replace the lower perforator.
The internal gasket is worn.
Replace the gasket.
The temperature of the dispensed water
is high.
check the cause and remedy any
problems.
coffee is dispensed with the ma-
nual key only.
The fuse of the control unit is damaged.
Replace the fuse of the control unit
(1a).
defective keyboard.
Replace the keyboard.
unacceptable coffee dispensing.
The coffee dose is not met.
The led of the dose key flashes.
The connection of the flowmeter is de-
fective.
check for proper connection of the
flowmeter.
The connection of the electronic control
unit is defective.
check for proper connection of the 8-
pin connector of the electronic control
unit.
The connector of the flowmeter has hu-
midity on it.
Remove the connector of the flow-
meter and dry the contacts.
The flowmeter is defective: during bre-
wing the flowmeter led does not flash.
Replace the heads of the flowmeter
or the whole flowmeter.
The one-way valve loses pressure (the
dose is too small).
check and replace the one-way
valve, if necessary.
The discharge valves lose pressure (the
dose is too small).
check and replace the discharge val-
ves.
Water leakage from the unit solenoid
valve during coffee brewing or when at
resting position.
clean and replace the solenoid valve,
if necessary.
The flowmeter is partially clogged.
clean or replace the flowmeter.