Fisher & Paykel DD607, DD247 service manual When Activated, During a Power Failure, Water Inlet

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3.5Lid System

The lid is a single piece of polymer plastic with a diaphragm/seal co-injection moulded into it. The centre of the lid can move relative to the seal. Each side of the lid is clipped into a yoke, which is in turn connected to a worm drive lid actuator assembly containing a small brushed DC 24 volt motor.

When the product is first plugged in and switched on at the wall, the lid motors are powered up to ensure that the lid is fully raised.

3.5.1 When Activated

At the beginning of the wash cycle, both lid motors are powered up to pull the lid down onto the tub flange in approx 2 -3 seconds. The lid remains down for the duration of the wash and is only lifted when the DishDrawer beeps to signal the end of the cycle, or if the cycle is paused to gain access to the tub.

3.5.2 During a Power Failure

If power to the DishDrawer™ fails with the lid down, the tub can still be forced open manually if access is required. It is very difficult however to close the tub again without raising the lid. The lid actuators can be wound up manually with the tub fully removed. Failure to raise the lid before closing the drawer can result in the lid seal being damaged.

3.6 Tub

The tub is the main cavity where all the wash activity occurs. The tub is a polymer plastic receptacle that houses the basket ware which includes adjustable cup racks and basket with fold down tines along with a wash pump and spray arm at the base. The tub also has guide vanes around its walls which direct falling water from the wash cycle in a clockwise direction around the filter plate. This clears the filter plate of food particles and washes them into the sump where they are trapped by the drain filter or pumped out during the drain cycle.

3.7Filling

3.7.1Water Inlet

The tub of the DishDrawer™ fills by a single water inlet hose. Hot water connection is recommended for USA and Japanese products, and cold water connection recommended for the Australasian, UK and European products. From the connection to the water supply tap in the kitchen, the inlet hose enters the cabinet of the dishwasher at the base, onto a dual water valve.

Each tub is supplied water independently via one of the dual valve coils and a fill hose that runs through a customised link assembly at the back of each tub and travels along the base of the tub under the wiring cover to the front. At the front of the tub, the fill hose connects to the water softener (if fitted) then to the detergent dispenser which directs water into the tub.

Depending on the market and cycle chosen, the product fills through the pre-rinse section of the dispenser for the pre-rinse cycles and secondly through the main wash section for all other cycles.

In a double product the controller allows only one inlet valve to operate at a time. This has been done to reduce EMC emissions, the top tub has priority.

Note: This restriction does not apply in diagnostic mode.