Saeco RI9722/11, Service Manual

Page: 43 / 224

INCANTO S-CLASS 4. FUNCTION/TIMING
Saeco International Group REV.1 FEB.2005 Page 3/9
3. Timing
The following time chart indicates the functions of the individual components in terms to time
HS - ON START PROGRAMMENDE END
Timing
Grinder motor
Heating
Pump *
Gearmotor auf ab
Status MS1
Status MS2
Status
Heating stage Coffee dispensing process Standby
Pulses
up down
app.45sec
acc. to coffee qty
Explanation:
Two processes start when the main switch is activated:
Firstly, the gearmotor is initialised. The gears move to MS1 (lower limit switch), change rotating direction,
leave MS1 and move to the home position (about 2 mm after MS1).
The instantaneous water heater is then activated for about 1 min 30 sec., heating the water to operating
temperature, whereby heating takes place for about 60 sec. continuously and then is alternated for the rest of
the time.
After activating the start button:
1.
The grinder starts operating (pulse-controlled).
2. The gears move to brewing position.
3. Pre-brewing begins (brief pump activation).
4. Main brewing process (duration of pump activation depending on selected coffee quantity).
5. The gears move to home position (dregs discarded).