Tub Home Sensor; Motor; Motor Rotor; Spray Arm - Fisher & Paykel DishDrawer DD60DI9 Service Manual

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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