Philips Saeco GranBaristo, Service Manual

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GRAN BARISTO 04 OPERATING LOGIC
3/7
Notes: * Only with Pre-brewing
4.2. Coffee cycle
Switching on
When the machine is switched on, the gear motor repositions itself as follows:
- It acts on microswitch 1 (see following chapter).
- The gear motor changes its rotation direction and moves upwards again by approx. 1-2 mm.
- The boiler begins to heat the water for approx. 30 sec with controlled power, in order to reach
the optimal temperature. The temperature will then remain at a constant level.
Coffee cycle
1. The grinding process is controlled by time duration in function of coffee strength selected.
2. The gear motor (brewing unit) moves to the brewing position.
3. Preliminary dispensing phase (short pump activity, short pause).
4. Product dispensing (the pump operation period is defined by the amount of product dis -
pensed).
5. The gear motor moves to its home position (the dregs are expelled automatically).
Main switch ON START STOP
Time
Coffee grinder
Heating
Pump
Brewing unit gear
motor
Status
Heating Ready Coffee cycle
Pulses
(Dosage)
Pump operation (flow
meter pulses) in
accordance with the
amount of product
selected.
approx.
45 sec.
*
Single microswitch gear motor
Status
Microswitch
OFF
ON