Philips 3000 series, Service Manual, Page: 36 / 79

PHILIPS 4000 and 3000 04 OPERATING LOGIC
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Notes: * Only with Pre-brewing
4.5. 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. 45 sec., at full power, in order to reach the
optimal temperature. The temperature will then remain at a constant level.
Coffee cycle
1. The coffee grinder starts the grinding process (controlled by Time).
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
Time
(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