English
18 EN
17. Defects - Malfunctions
Interventions by a specializes technician
PROBLEM
CAUSE
SOLUTION
Dispensing slow.
Coffee burnt and cold.
Cream very dark, with tendency of
formation of an “eye”.
Coffee grounds too fine.
Low pressure in pump.
Mesh filter above spout dirty.
Spout partially blocked.
Dispensing slow, coffee burnt.
Pressure gauge pump lower than
131 psi (9 bar).
Pump out of calibration.
Pump with reduced capacity.
Drainage tube leaks when group is
at rest (defect only on one group).
Coffee dispensed normally.
Dispensing valve does not hold.
If this defect is not corrected immediately, the
water softener runs out long before the expiry
time, with consequent scale deposit.
Group at rest
Dispensing valve gasket fails
rapidly.
Water leak from the drainage tube.
Coffee dispensed normally.
Defect on all groups.
Expansion valve with calibration too
high (above 174 psi (12 bar).
If this defect is not corrected immediately,
the water softener runs out long before
the expiry time, with consequent scale
deposit.
Group at rest.
Continuous loss of cold water in
the drainage tray. Groups do not
dispense any more coffee and the
pressure gauge pump shows low
values.
Expansion valve remained open.
If this defect is not corrected immediately,
the water softener runs out long before
the expiry time, with consequent scale
deposit.
Group in operation.
Drainage tube leaks.
No coffee.
Drainage valve does not hold.
Group in operation.
Loss of cold water in drainage tray.
Coffee bland.
Dispensing slow.
Expansion valve out of calibration
(opens at less than 131 psi (9 bar).
Group leaks at cam shaft.
Leak on the two glands.
Remove the glands taking care not to mark
the housings. Do not use tools made of
steel or other hard materials.
Before remounting, clean the shaft
thoroughly, especially the grooves
Difficult to move the groups.
Cam profile worn.
Machine does not go into pressure
or reaches pressure level slowly.
No electricity.
Automatic switch gone off.
Resistances burned.
Electric circuit to resistance
interrupted.
No water in boiler.
Steam taps leak:
Groups function normally.
Pressure gauge pump does not give
correct pressure reading 116 ÷ 131
psi (8 ÷ 9 bar).
Pressure gauge defective.
Pump does not reach pressure
level.
No dispensing.
Motor does not work:
- No electricity.
- Capacitor burnt.
- Microswitch burnt.
- Motor burnt.
Check valve pump open.
By pass valve completely opened.
Pump noisy.
Pump defective.
No water in system.
Summary of Contents for E61 Legend
Page 23: ...A B C D E ...
