Inlet Valve
When the inlet valve (SOL1) is operated manually in Service
mode, it cannot
fill
the unit to the point that water
overflows
out
of the unit. The water level is monitored by the pressure sensor.
When the pressure sensor reaches a predetermined value, the
MCM turns on the drain pump.
UIM and Tub Light Behavior
UIM lighting and tub lighting operation are synchronized.
▪
When the UIM lighting turns on, the rate that the UIM lights
increase their brightness matches the rate that the tub lights
increase their brightness so that both lighting systems
match.
▪
When the door is closed, the tub lights instantly turn off.
▪
When the door is opened, the tub lights slowly increase
their brightness to 100% output level in 3 seconds.
▪
If the door is left open at an angle for 10 minutes, the tub
lights dim slowly to a 20% output level. Then, if the user
leaves the door open at any angle for another 5 minutes,
the tub lights turn off. If the door moves during this 15-
minute period, the tub lighting dimming sequence starts
over.
When Standby Power mode automatically turns on, all lighting
dims as above.
Dishwasher lighting control does not affect or control lighting on
the Sub-Zero Group Owner's App.
Temperature and Turbidity Sensor
The temperature and turbidity sensor (AE1) is a combination
sensor.
▪
The temperature sensor portion is an integrated NTC
thermistor. The temperature sensor will sense incoming
water temperature as soon as the level of water in the sump
rises to cover it.
▪
The turbidity sensor portion uses infrared light to measure
opacity of a liquid. It is located in the sump to measure how
dirty the water is. This helps to determine the rate of
cleaning of the load.
The dishwasher's UIM has no means to show temperature or
turbidity. Monitoring either of these requires the Connected
Diagnostics Program.
WASH CYCLES AND USER CONTROL
The dishwasher's menu is arranged as a multi-level tree with
pre-assigned UIM keys to navigate up/down and left/right. It
also has pre-assigned UIM keys to either select or disregard a
value anywhere within the menu.
Auto Cycle
The Auto cycle uses the turbidity of the water and its change
over time to decide the duration and intensity.
Auto starts with a prewash cycle, during which the unit drains
and
fills
to 1.1 gal. The unit then washes and takes turbidity
readings once per minute, calculating the average turbidity and
the change in the average turbidity as time passes. The unit
washes and accumulates turbidity data for 10 minutes (up to 15
minutes if the turbidity is not stable). Then, it selects a cycle
based on the average turbidity:
▪
Very Light
(~2:07, 4 gal, crumbs, juice/wine/beer glasses
very light loads).
▪
Light
(~2:30, 5.1 gal, cereal bowls, milk glasses, wine/beer
glasses, mashed potatoes, meat juices).
▪
Average
(~2:55, 6.2 gal, tomato juice, fried eggs, cream
corn, jams/jellies, tomato sauces).
▪
Heavy
(~3:25, 7.3 gal, oatmeal/hot cereals, scalloped
potatoes, dried egg yolk, peanut butter, creamed corn).
▪
Very Heavy
(~3:55, 8.4 gal, dried/baked on starchy
foods, dried on milk products, oven pans used for roasting
meats, casserole foods).
Normal Cycle
The Normal cycle uses the turbidity of the water and its change
over time to decide the duration and intensity.
Normal starts with a pre-wash cycle, during which the unit
drains and
fills
to 1.1 gal. The unit then washes and takes
turbidity readings once per minute, calculating the average
turbidity and the change in the average turbidity as time passes.
If the turbidity is stable after about 13 minutes or if the unit has
been washing for more than 20 minutes with varying turbidity
behavior, the unit chooses the Light or Average setting based
on the average turbidity level. However, if the turbidity is
consistently low (indicating dirty water) after the
first
fill/wash/
drain,
the unit chooses the Heavy setting.
▪
Light
(~2:40, 3.0-8.3 gal, cold cereal bowls, milk glasses,
wine/beer glasses, meat juices)
▪
Average
(~2:40, ~5.0 gal, tomato juice, fried eggs, cream
corn, jams/jellies, tomato sauces, starches)
▪
Heavy
(~2:40, 5.3-8.3 gal, oatmeal/hot cereals, scalloped
potatoes, dried egg yolk, peanut butter, creamed corn)
Note: Within the Heavy setting, the unit chooses one of two
sets of
fills
and drains depending on the turbidity
(five
total
fills
and drains if the turbidity improves or eight total
fills
and
drains if the turbidity remains low).
Set a Wash Cycle
1
Touch the desired wash cycle, or touch multiple
times to scroll to the desired wash cycle.
DW2450 and DW2450WS Service Manual
Controls and Operation
service.subzero.com
828019 REV. A 02/2019
3
