Douwe Egberts Cafitesse 100, Service Manual

Page: 171 / 210

07.2004
5F - 9
Functions - Cooling System Service Manual Cafitesse 100
Temperature regulation
• The electronic temperature sensor is
attached on the outside to the cooling
compartment base.
• The cooling system is supplied by the
transformator T01. The secondary voltage is
rectified on the control board.
• The sensor connects the cooling circuit
when the cooling compartment temperature
rises to approx. 2.8 °C and switches direct
current of 11–13V (depending on the mains
supply voltage) to the Peltier element.
• Heat is conducted from the cooling
compartment through the heat sink and the
fan to the surrounding air. The fan is
connected to the mains supply and
operates permanently.
• The sensor disconnects the cooling circuit
when the temperature decreases to approx.
1.7 °C. The temperature regulation ensures
that the concentrate is kept at a specific
temperature of +2 °C to +6 °C.
• The cooling system can only be switched
off by disconnecting the dispenser from the
mains supply.
Ambient temperature
• When the ambient temperature exceeds
32 °C sufficient cooling cannot be
guaranteed any more.
Error indications cooling compartment
temperature
• see chapter Error Codes