828019 REV B 08/2023
DW2450 and DW2450WS Service Manual
service.subzero.com 800.222.7820
Controls and Operation
MODES
Modes are the dishwasher's operational states, in which
the dishwasher varies its behavior according to instructions
from the following:
User input from the UIM
Connected appliance communications from a tablet
or other connected device
Smart Grid
MODE DESCRIPTION
Power-Up mode The unit is first turned on.
User mode The unit is used for day-to-day,
ordinary operation.
Standby Power mode The unit enters a low-power
state after a specified period of
inactivity.
Sabbath mode The unit is set up by the user for
certain religious observances.
Child Lock mode The unit's UIM is locked to
prevent unwanted operation.
Showroom mode The unit is set up by sales staff
for demonstration purposes.
Service Diagnostic mode Activated by Service personnel
in the user's residence. See
Service Mode.
POWER-UP MODE
Power-Up mode is the control system's initial power-up/
boot sequence, when the unit first connects to AC power.
In Power-Up mode, all power supplies and all electronics
initialize their associated circuitry and components.
Power-Up mode does not have water softener
regeneration messaging, Bluetooth PIN messaging,
diverter valve movement, or lighting.
Digital Wi-Fi connection X13’s ON/OFF state is OFF until
after the boot sequence, when the software will set it to
either OFF or ON.
If the unit does not successfully pass though Power-Up
mode, the UIM shows "PF - Call Service."
USER MODE
User mode is the normal, day-to-day operation mode of the
dishwasher. This mode does not require any key press
combinations to enter or exit, but the unit's control system
may enter and exit User mode automatically, for example
entering Standby Power mode after a period of inactivity.
User mode allows all control system functions including
Smart Grid requests, Bluetooth pairing, water softener
regeneration messaging, diverter valve movement,
pressure-based drain pump control, and the digital Wi-Fi
connection X13.
STANDBY POWER MODE
During periods of inactivity, the unit can automatically enter
a Standby Power mode in which it consumes no more than
0.5 W of power.
Standby Power mode occurs when the unit has either:
Had no door movement and no communication and
has not logged any errors for 15 minutes.
Completed its wash cycle with the door still latched
shut.
In Standby Power mode, the UIM is blank, and all control
system outputs are disabled including tub lighting, water
softener regeneration messaging, and diverter valve
movement. Pressure-based drain pump control is allowed.
If the pressure goes above its range, the unit will exit
Standby Power mode to communicate the error.
Standby Power mode is exited by moving the door,
pressing any UIM key, receiving a Bluetooth pairing PIN
display command, or triggering an error.
Standby Power mode never occurs when the unit's
"Connect?" option is turned on.
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