Blomberg 8978983800, Service Manual, Page: 17 / 70

BWOS 30100 SERVICE MANUAL
17
2.9.1 Child - safe locking system
All of our ovens are built-in child-safe locking systems. The future is automatically
enabled any time the appliance is connected to the power, any time the switch is
turned on and any time the oven is programmed to run a self-cleaning of the cavity.
The same future it can be is used on the manual mode in the household where a
minor is present to prevent children from getting in touch with hot parts. The
function of this future is explained in details on the chapter
3.3.5 .
2.9.2 Over heating sensor
All of our ovens are built with a over heating sensor system:

we have two bi-metal mechanical thermostats for each cavity .

an electronic sensor “
NTC
” or “negative temperature coefficients” mounted
on the main power board (see chapter 2.7 for more information). The role of
the “
NTC
” is to protect the electronic boards of an eventually over-heating.
(the “
NTC
” varies with the values of voltage, only DC, values tabulated at
2.7 )
An electronic “
PTC
” or “positive temperature coefficients” probe mounted on the
inside of the cavity who is responsible of the inside cavity reading of the
temperature. (the “
PTC
” varies with the resistance – tabulated at chapter…)
2.9.3 Thermostat
All of our ovens are built with two bi-metal mechanical thermostats for each cavity.
The thermostats are mounted in contact with the metal sheet on top of each cavity
as shown in the above pictures.
2.9.4
Double Speed Thermostat
The double speed thermostat is acting in conjunction with the by-pass resistor and is
2.9 OVEN SAFETY FUTURES