16.
Identifying problems:
- Always ensure that there is enough ground coffee for at least one dose in the grinder-doser´s reservoir.
- If the coffee drops are to slowly then grinding is propably too fine. Vice-versa, if it drops to fast, the grinding is too coarse.
- Remember that the machine´s operating process forces the water over the coffee at high pressure. If contact between the
water and the ground coffee lasts more than 30 seconds, the coffee will taste unpleasent and bitter. The effect is called
over-extraction.
- Always heat the cup by rinsing it in hot water. If the cup is cold, the abrupt temperature change of the espresso coffee will
change its taste.
- Never load the filter holder without making an immediate delivery; the ground coffee would ”burn” in the group and the
espresso obtained would be very bitter.
Attention: ALWAYS UNPLUG THE ELECTRICITY when carrying out maintenance checks or operations.
The following maintenance operations must be carried out by specialized personnel, authorized by
the manufacturer. Do not perform makeshift or ad-hoc repairs, and never use non-original spare parts.
Problem:
The group does not deliver water and the pump is noisy.
Cause 1:
The water mains tap or the softener taps are shut.
Cures:
Open the taps.
Cause 2:
The water entry union filter is obstructed.
Cures:
Dismantle and clean.
Problem:
The group does not deliver water.
Cause 1:
The jet is obstructed.
Cures:
Remove the jet plug, check and clean or replace as necessary.
Cause 2:
The injector is obstructed.
Cures:
Dismantle and clean, replace if necessary.
N.B. check the regeneration of the softener resins.
Cause 3:
(Only for versions with electronic dosing): the entry union of the doser is obstructed.
Cures:
Dismantle and clean.
Cause4:
The solenoid valve will not open.
Cures:
The coil is not getting power; check and correct.
- The coil is broken; replace.
- The core is blocked; preferably replace the complete solenoid valve.
Problem:
The boiler is under pressure but the group does not heat up.
Cause 1:
Air bleeding of the boiler did not occur during the water heating stage.
Cures:
When cold check that the air vacuum valve is not blocked shut. Replace if necessary.
Cause2:
The water heating circuit is partially obstructed.
Cures:
Check the group´s inlet and outlet pipes and unions. Clean and replace if necessary.
N.B. Check the regeneration of the softener resins.
Problem:
The boiler will not heat up.
Cause1:
The heating element is broken.
Cures:
Replace.
Cause2:
The heating element is not receiving power.
Cures:
- The safety thermostat is faulty; check and replace if necessary.
- The pressure switch is faulty;. check and replace if necessary.
- One or several Triacar is broken.
10. Faults and routine repairs
Crema Compact och Digital
