| DEFECT |
|
CAUSE |
|
SOLUTION |
LIGHT CREMA
the coffee descends too quickly |
|
Coarse grind
Weak tamping
Scant dose
Pump pressure under 9atm
Clogged shower screen
Widening of filter holes |
|
Finer grind
Increase tamping
Increase dose
Increase pump pressure
Clean or replace
Replace |
|
|
DARK CREMA
the coffee descends too slowly |
|
Fine grind
Strong tamping
Excessive dose
Water temp. Over 90c
Pump pressure under 9atm
Clogged shower screen
Clogged filter basket
|
|
Coarser grind
Decrease tamping
Decrease dose
Decrease boiler pressure
Decrease pump pressure
Clean or replace
Clean thoroughly |
|
|
SHORT
HOLDING CREMA
|
|
Wrong grind set
Prolonged extraction due to filter clogging
Water temp. Over 90c |
|
Adjust grind
Clean thoroughly
Decrease boiler pressure |
|
|
COFFEE GROUNDS INSIDE THE CUP
the coffee descends too quickly |
|
Fine grind
Worn grindstones
Pump pressure over 9atm
Clogged shower screen
Widening of filter holes |
|
Coarser grind
Replace grindstones
Decrease pump pressure
Clean or replace
Replace |
|
|
DEPRESSIONS IN COFFEE GROUNDS
|
|
Partially clogged shower screens |
|
Clean or replace
|
