Wolf Sub-Zero ICB400 Series Service Manual page 39

Electronic Control System
MODEL ICB427R REFRIGERATOR SECTION BASIC INPUT OPERATIONS
The following few pages describe the basic input operations performed at the ICB427R control panel (switching the
unit ON or OFF; adjusting set-point (temperature adjustment); enabling and disabling door ajar alarm feature).
Please note that though possible to display temperatures in Celsius or Fahrenheit, in most cases Celsius readings
are shown.
Switching Refrigerator Section ON or OFF
All units are shipped in OFF Mode. When power is supplied to the unit, a trace of the word "OFF" is visible on the
LCD. By pressing the POWER key
This will be indicated by the unit lights and LCD energizing.
NOTE: Whenever the unit is switched OFF using the POWER key, a trace of the word "OFF" will be visible on the
LCD as long as power is supplied to the unit. This differs in Sabbath Mode, which will be covered later.
WHEN IN OFF MODE, 230 VOLTS AC IS STILL PRESENT AT CONTROL BOARD.
Figure 3-46. Switching Refrigerator Section On or Off, Press
Adjusting Set-Point (Temperature Adjustments)
To adjust set-points, press WARMER or COLDER key on control panel in multiple key strokes until the desired set-
point is achieved. One key stroke equals one degree change (Celsius or Fahrenheit).
NOTE: Temperature range is +1°C (+34°F) to +7°C (+45°F), with initial set-point of +3°C (+38°F).
NOTE: The initial stroke of the WARMER or COLDER keys will change previous set-point by one degree.
NOTE: The set-point will be displayed on the LCD for ten (10) seconds after the last WARMER or COLDER key
stroke. After the ten (10) second delay, the zone temperature will be displayed. As the zone temperature changes,
the temperature displayed on the LCD will change by no more than one degree per minute.
Figure 3-47. Adjusting Set-Point, Press
7011544 - Revision A - November, 2008
International W
International W
(See Figure 3-46), power is allowed past the control board to the rest of the unit.
(WARMER) or
3-26
ine Storage
ine Storage
(ICB400)
(ICB400)
(COLDER) Key In Multiple Key Strokes
Series
Series
(POWER) Key
(See Figure 3-47)