Sub-Zero UC-24 series Service Manual page 10

Electronic Control System
Showroom Mode
Showroom Mode was incorporated into the electronic control system so these appliances could be displayed in a
showroom setting. When in Showroom Mode, all cooling functions are disabled, but the lighting system and LCD
remain active.
To initiate Showroom Mode, the unit must first be switched OFF using the POWER key (See Figure 3-14). With the
unit switched OFF, press and hold either pair of WARMER and COLDER keys, then press the POWER key, then
release all three keys (See Figure 3-15).
To return unit to normal operating condition, repeat the steps above.
NOTES:
• Always check set-points after returning unit to normal operating condition.
• It is possible to determine if a unit is in Showroom Mode by initiating Diagnostic Mode. If "Sr" is observed in the
left temperature display area during Diagnostic Mode, the unit is in Showroom mode. Initiating Diagnostic Mode is
covered later in this section.
Figure 3-14. To Enter (or Exit) Showroom Mode, Switch Unit OFF First
Figure 3-15. After Unit is Switched OFF, Press and Hold the WARMER and COLDER Keys,
#7003933 - Revision B - November, 2007
Under Counter (UC-24) Series
Then Press the POWER Key
3-10
Press and release,
switching unit OFF