Wine Storage
Wine Storage
(400-
(400-
2
2
)
)
Series
Series
Electronic Control System
3-33
#3758410 - Revision C - May, 2014
427R-2 Ref Thermistor Codes
THERMISTOR LOCATION CODE
Refrigerator Compartment r
Refrigerator Evaporator E
MODEL 427R-2 REFRIGERATOR SECTION TROUBLESHOOTING INPUT OPERATIONS
The following few pages explain troubleshooting input operations performed at the control panel. The input opera-
tions described are Diagnostic Mode, Manual Component Activation Mode and Temperature Log Recall.
Diagnostic Mode
Initiating Diagnostic Mode allows the Service Technician to observe real-time temperature readings from all thermis-
tors without temperature averaging.
To initiate Diagnostic Mode, the unit must be ON, then press and hold the COLDER key, and the UNIT ON/OFF key,
then release both keys (See Figure 3-64). At the left side of the LCD will be the real-time temperature of the ther-
mistor, at the right will be the thermistor location code, and all icons will illuminate. Pressing the COLDER key while
in Diagnostic Mode will toggle forward to the next thermistor location (See Figures 3-65), while pressing the
WARMER key will toggle to the previous thermistor location.
NOTE: If the COLDER and UNIT ON/OFF keys are pressed and held for ten (10) seconds, Manual Component
Activation Mode will be initiated. This is covered later in the section.
NOTE: Diagnostic Mode will end twenty (20) seconds after the last key stroke.
Figure 3-65. Toggle Through Temperature Readings - Press COLDER Key.
(“E” Indicates Evaporator)
NOTE: In this model, with only two location codes, pressing the WARMER key at this time will also toggle to the
evaporator temperature reading.
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