Diagnostic Mode - Sub-Zero Built-In Series Assembly

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Electronic Control System
SERVICE INPUT OPERATIONS
The following few pages explain service input operations that can be performed at the control panel: Diagnostic
Mode, Fault Code Recall Mode, Temperature Log Recall Mode, Model Configuration Mode, Manual Zone
Component Activation Mode and Self-Test Mode.

Diagnostic Mode

Diagnostic Mode allows the Service Technician to observe current, real-time temperature readings from all thermis-
tors without weighted averaging or offsets. Diagnostic Mode is also used as an interim step to get into other modes.
NOTE: The key strokes to initiate Diagnostic Mode and Fault Code Recall Mode are the same. If the electronic
control has recorded Fault Codes, then the key strokes listed below will initiate Fault Code Recall Mode, which will
be explained later. If Fault Codes are observed but the desire is to view current temperature readings from the ther-
mistors, then press the ALARM key; this will shift the electronic control system into Diagnostic Mode.
To initiate Diagnostic Mode, the unit must be ON, then press and hold either COLDER key, and press the POWER
key, then release both keys. If there are no Fault Codes logged, then at left in the LCD will be current, real-time
temperature readings of a thermistor; at right will be the thermistor location code, and all icons in the LCD will illumi-
nate (See Figure 3-61). Pressing a COLDER or WARMER key while in Diagnostic Mode will toggle to the next or
previous thermistor location, respectively
Additional Diagnostic Mode Notes on following page)
NOTES:
• Do not press and hold the COLDER and POWER keys for more than ten (10) seconds, as this will initiate Manual
Zone Component Activation Mode, which is covered later in the section.
• Diagnostic Mode will end twenty (20) seconds after the last key stroke, or press the ALARM key to exit this mode.
LIGHTS ICE MAKER MAX ICE
Figure 3-61. Initiate Diagnostic Mode - Press and Hold Either COLDER Key, Then the POWER Key -
LIGHTS ICE MAKER MAX ICE
Figure 3-62. Press WARMER (or COLDER) Key to Toggle Through the Temperatures -
#7019014 - Revision A - October, 2010
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Main Menu
Built-In (BI) Series
Built-In (BI) Series
(See Figure 3-62
Temperature
COLDER WARMER
("r" = Refrigerator Compartment)
COLDER WARMER
("rE" = Refrigerator Evaporator)
Main Menu Built-In Series Menu
Built-In Series Menu
below and Thermistor Location Code Table with
Temperature Units of Measure
COLDER WARMER
Location Code
COLDER WARMER
3-34
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