Asko DW Outdoor Service Manual page 13

Service manual DW Outdoor
Component description
Thermistor
The thermistor for temperature measurement
is located at the front edge of the bottom
drain. The thermistor measures and controls
the water temperature, which can be up to
70°C (158°F). If the thermistor short-circuits or
loses contact with the CU, or of the thermistor
does not register a temperature increase of
5°C (41°F) within 10 minutes of the element
being activated, the element is switched off and
a fault code is indicated. This is only indicated
in the service menu. The thermistor is of the
NTC type (Negative Temperature Coeffi cient),
i.e. its resistance decreases as temperature
increases.
Purpose: To control the water temperature during
the dishwashing process.
EMC fi lter with inductor
The fi lter is fi tted at the front of the base pan
and consists of a number of coils, condensers
and resistors.
Purpose: To eliminate electromagnetic
interference to and from the machine.
Cables
The machine is fi tted with coded connectors
to prevent incorrect wiring. The cables comply
with the Rast 2.5 and Rast 5 standards.
Pressure sensor
The pressure sensor is connected to the
pressure chamber in the bottom drain. It
measures the pressure, which corresponds to
the water level in the machine. If the water level
in the machine is too high (for fi ve consecutive
seconds) the drain pump starts and all other
components are switched
level is reached, the program continues where
it left off. If the level sensor generates an output
signal of <1 VDC during the prewash (indicating
a blocked fi lter), an additional prewash is
activated with an SCS step.
The level sensor also controls the draining
time (can be extended from 20 seconds to a
maximum of 2 min). The sensor also checks the
need to refi ll (such as if a bowl fi lls with water).
Purpose: To prevent overfl ow, to detect a
'blocked fi lter', when necessary refi ll the machine
(such as if a bowl has fi lled with water), and to
control the draining time.
Overfl ow guard
The overfl ow guard is integrated with the
bottom drain. This overfl ow guard consists of a
micro switch activated by a fl oat if water collects
on the machine's base pan. The micro switch is
normally closed. When it is activated, it breaks
the circuit to the CU, the drain pump starts,
the program is interrupted and the machine
indicates an overfl ow.
Purpose: To provide protection from any
water leaks or fl ooding from the machine.
off. When the correct
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