Fisher & Paykel DishDrawer DD60 Service Manual page 28

4 TECHNICAL OVERVIEW
4.5 Tub Home Sensor
The tub home sensor determines when the tub is closed.
The tub home sensor consists of an infrared transmitter and
receiver mounted on the right side of wash controller. When
the tub is fully closed, infrared light is transmitted from the
sender through a light pipe on the side of the tub, through
a prism mounted in the chassis trim, then back through
the other light pipe to the receiver. If the tub is not fully
closed, the circuit is not complete and the appliance will
not operate.
4.6 Motor
The motor is a fully electronically controlled 80V, 60w,
3 phase, 6 pole brushless DC motor, running on wash
at between 2200 - 2800 rpm depending on the cycle
selected, and at approximately 5000 rpm on drain.
4.7 Motor Rotor
The rotor is a four-pole permanent magnet rotor with a
graphite bearing at each end of the vertical shaft. At the
lower end of the rotor shaft is the drain impellor and at the
upper end is the wash impellor.
4.8 Spray Arm
The spray arm is shaped for most efficient water flow. The
holes are positioned for best penetration into the wash
load, with the water jets angled to ensure the spray arm
rotates at the most efficient speed. There are 2 sluicing
jets located at the bottom of the spray arm to direct soils
into the drain filter.
4.9 Filter Plate
The filter plate is positioned below the dish rack and spray
arm.
The filter plate has a rubber over mould around the edge
and centre to reduce soil re-depositing.
These improvements will ensure a better wash
performance.
The drain filter fits tightly into the filter plate, due to the
rubber over mould around the edge.
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