Unique Electronic Control Input Operations; Temperature Units Selection Mode; Sabbath Mode - Sub-Zero 700-3 BASE Technical & Service Manual

Electronic Control System

UNIQUE ELECTRONIC CONTROL INPUT OPERATIONS

The following pages describe unique electronic control input operations performed at the control panel that you
would not expect a customer to perform every day. The following input operations described are Temperature Unit
Selection Mode, Sabbath Mode, Showroom Mode, and Manual Freezer Evaporator Defrost.
Temperature Units Selection Mode (Selecting Degrees Fahrenheit or Degrees Celsius Display)
The electronic control is initially set to display temperature in Fahrenheit (°F) units of measure. Units of measure
can be converted from °F to °C (Celsius), and/or back again. This operation is called Temperature Units Selection.
NOTE: Temperature Units Selection must be performed within the first minute after switching the unit ON.
To convert the temperature units of measure from Fahrenheit readings to a Celsius readings, press and hold the
door ajar alarm bell ON/OFF key and the UNIT ON/OFF key simultaneously for 5 seconds, then release the keys.
" °C " will appear on the LCD indicating temperatures will now be displayed in Celsius units of measure. (See Figure
3-11) To convert back to Fahrenheit units of measure, repeat the steps above.
NOTE: Bottom Drawer must be closed. If not closed, unit will enter Model Configuration Mode.
NOTE: Temperature Units Selection Mode will end 10 seconds after the last key stroke.
Figure 3-11. Converting Temperature Units of Measure (within first minute after switching unit ON)
Press and Hold the Bell ON/OFF Key and UNIT ON/OFF Key for 5 Seconds

Sabbath Mode

Sabbath Mode was incorporated into the electronic control system for the observance of certain religious days.
Initiating Sabbath Mode disables the LCD, lighting system, icemaker systems and the door ajar alarm feature.
To initiate Sabbath Mode, the unit must first be switched OFF using the UNIT ON/OFF key (See Figure 3-12), then
press and hold the UNIT ON/OFF key for approximately 10 seconds, until the LCD and lights switch OFF (See
Figure 3-13). To return to normal operation, press and release the UNIT ON/OFF key.
NOTE: During Sabbath Mode, the refrigerator fan and evaporator fan may function when drawers are open.
NOTE: During Sabbath Mode, the LCD is disabled and set-points cannot be changed.
Figure 3-13. After Unit is Switched OFF, Press and Hold UNIT ON/OFF Key for 10 Seconds
#3758424 - Revision B - December, 2005
FREEZER
OFF
FREEZER
Figure 3-12. To Enter Sabbath Mode, Switch Unit OFF First
FREEZER
Integrated
(700-
COLDER WARMER COLDER WARMER
Press and hold for 5 seconds
COLDER WARMER COLDER WARMER
COLDER WARMER COLDER WARMER
Press and hold for 10 seconds
3-8
3 Series
BASE)
ICE
REFRIGERATOR
ON/OFF
ON/OFF
ICE
REFRIGERATOR
ON/OFF
ON/OFF
ICE
REFRIGERATOR
ON/OFF
ON/OFF
UNIT
ON/OFF
UNIT
ON/OFF
UNIT
ON/OFF