Sabbath Mode (Lights Off Mode); Showroom Mode; Switch Unit Off First; Initiate Sabbath Mode, Press And Hold Unit On/Off Key For 10 Seconds - Sub-Zero 424HAG/O-2 Service Manual

400-2 series
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Electronic Control System
Wine Storage
Series
Wine Storage
Series
2
2
(400-
)
(400-
)

Sabbath Mode (Lights Off Mode)

Sabbath Mode was incorporated into the electronic control system for the observance of certain religious days.
Initiating Sabbath Mode disables the LEDs and lighting system.
To initiate Sabbath Mode, the unit must first be switched OFF using the UNIT ON/OFF key (See Figure 3-11), then
press and hold the UNIT ON/OFF key for ten (10) seconds, until the LEDs and lights switch OFF (See Figure 3-12).
To return to normal operation, press and release the UNIT ON/OFF key.
NOTE: During Sabbath Mode, the evaporator fans may function when the door is open.
NOTE: During Sabbath Mode, the LEDs are disabled and set-points cannot be changed.
Figure 3-11. Switch Unit OFF First
Hold for 10 Seconds
Figure 3-12. Initiate Sabbath Mode, Press and Hold UNIT ON/OFF Key for 10 Seconds

Showroom Mode

Showroom Mode was incorporated into the electronic control system so the appliance could be displayed in a show-
room setting. When in Showroom Mode, all cooling functions are disabled, but the lighting system remains active.
To initiate Showroom Mode, the unit must first be switched OFF using the UNIT ON/OFF key (See Figure 3-13).
Then press and hold the upper compartment WARMER and COLDER keys, and the UNIT ON/OFF key, then
release all three keys (See Figure 3-14). The unit is now in Showroom Mode. This can be verified by checked for
evaporator fan operation, and/or compressor operation. To return the unit to normal operation, repeat the steps
above.
NOTE: Always check set-points after returning unit to normal operation.
Figure 3-13. Switch Unit OFF First
Figure 3-14. Initiate Showroom Mode,
Press Upper COLDER and WARMER Keys and UNIT ON/OFF Key, then Release
3-8
#3758410 - Revision C - May, 2014

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