GRADISCA Restyling
rev.1- 06/2004
22
Automatic washing cycle of the groups
Prepare the group as follows:
1) Unhook the filterholder from the group (part.A pict.C) and replace the brewing filter (part.B
pict.C) with the blind filter (part.C pict.C).
2) Put the recommended quantity of detergent into the blind filter (part.D pict.C).
3) Hook the filterholder into the group (part.E pict.D).
To access the cleaning status press the STOP-keys four times on all the key-pads
At this stage the machine will begin the cleaning cycle, that lasts about 3 minutes.
The cleaning cycle is split up as follows: 30 seconds running, 5 seconds pause, all reeated
5 times.
The whole length of the cleaning is signalized by the blinking of all the green LEDs (part.2-
3-5-6 pict.1) together with the red one (part4 pict.1).
The cleaning cycle can be interrupted by pressing STOP.
At the end of each cleaning cycle, one of the LEDs lights off; when all the LEDs are off, the
cleaning is done.
The groups rinsing procedure is similar to the cleaning. Unhook the filterholders (part. F
pict.E) and replace the blind filter (part.F pict.E) with the brewing filter (part H pict.E).
Hook the filterholder (part.E pict.D) into the group.
Press the CONT key (part.1 pict.B).Press STOP on all key -pads.
Grinding control
The machine has a grinding control function that warns the operator when the coffee brewing time is out of the correct preset time (for ex.
because of atmospheric variable condition - grindstones wear etc...).
This function is usually disabled when the machine is delivered: follow the instructions below to enable it.
Operating of the control
Correct grinding is controlled by measuring the coffee brewing time.
At every delivery the electronics checks that the used time is in the optimal range, i.e. the optimal brewing time ± 20%.
Should the brewing time of 5 consecutive deliveries be shorter than the optimal interval,
the machine alerts the operator that the grinding is too coarse through the blinking of the LEDS nr. 2 and nr. 5 (pict.1).
Should the brewing time of 5 consecutive deliveries be longer than the optimal interval
the machine alerts the operator that the grinding is too fine through the blinking of the LEDS nr. 3 and nr. 6 (pict. 1).
Alarm will disappear automatically with a right coffee delivery (brewing time within the optimal range).
