During A Power Failure; Tub; Filling; Water Inlet - Fisher & Paykel DishDrawer DD24D Series Service Manual

3.4.2

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.
3.5

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 that 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.
3.6

Filling

3.6.1

Water Inlet

The tub of the DishDrawer™ fills by a single water inlet hose.
recommended for USA and Japanese products, and a 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.
On double models, 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. This restriction does not apply in
diagnostics mode.
3.6.2

Dispensing Detergent and Rinse-aid

The dispenser is mounted in the front wall of the wash tub.
The detergent dispenser consists of two detergent chambers, one for pre wash and the other for
the main wash.
The detergent dispenser door is opened manually for detergent loading and then manually closed
ready for the detergent to be transported to the wash tub by the inlet water. To enable each
detergent chamber to be dispensed separately, an inlet water diverter valve controlled by the
electronics is required.
Additionally, a positive displacement pump unit and storage tank is incorporated within the
dispenser to supply rinse aid. The rinse aid dispensed volume can be adjusted by the customer in
option adjustment mode. A glowing red light on the tank filler cap indicates an empty rinse aid
tank. The pump frequency is 1 Hz, and makes a slight beeping sound.
17
599735A
Hot water connection is