Asko DW Outdoor Service Manual page 11

Service manual DW Outdoor
Component description
Flow meter
The fl ow meter is fi tted in the air gap and
cannot be replaced separately. It comprises an
impeller that is rotated by the fl ow of water
from the inlet valve. The impeller is fi tted with
two magnets that affect a sensor, a so-called
reed switch. This is connected to the control
unit via a wire and provides the control unit
with information on the amount of water
entering the machine. In order for the fl ow
sensor to function normally the incoming
water pressure must be at least 2 bar (29 psi).
Output signal: 220 pulses per liter (0.26 gallon)
of water fl owing through.
Circulation pump
The circulation pump comprises an asynchronous
motor with a capacitor and a pump housing with
an impeller. The impeller and seals cannot be
replaced separately, rather the entire pump must
be replaced. The circulation pump can be rated
220-240V, 50/60Hz, as well as 120V, 60Hz.
Purpose: To provide the spray system with the
water pressure necessary for the dishwashing
process.
Flow meter
Heating element
The heating element is of the fl ow-through
type and is fi tted between the bottom drain
and the suction connector of the circulation
pump. It comprises a pipe with a heating coil.
One side of the heating coil is fi tted with an
overheating cut-out with a trigger temperature
of 98°C (208°F) and an automatic reset. The
other side is fi tted with a safety fuse that blows
at 229°C (444°F). The element is replaced
from the rear of the machine by fi rst moving
the circulation pump out of the way.
Purpose: To heat the dishwater to the correct
temperature during the prewash/main wash and
fi nal rinse.
Drain pump
The drain pump is fi tted to the bottom drain and
can be replaced from the front of the machine.
In the bottom drain, under the fi lters, is a access
plug which when removed enables the customer
to clean the pump housing. In the event of a
blockage the pump changes its direction of
rotation to try to clear the blockage.
Purpose: To drain the water from the cleaning
compartment in accordance with the program
specifi cation and in case of overfl ow.
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