Electronic Control
Integrated (
Integrated (
700-
700-
2) Series
2) Series
3-22
#3756780 - Revision D - July, 2005
700-2 TALL UNIT ELECTRONIC CONTROL TROUBLESHOOTING INPUT OPERATIONS
The following few pages explain troubleshooting input operations performed at the 700-2 tall unit control panel. The
input operations 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.
NOTE: The models 700TF/I-2 & 700TF/I-2V have only one compartment thermistor and one evaporator thermistor.
NOTE: Since Diagnostic Mode varies only slightly between the different models, a diagram of the 700TC/I-2 control
panel is used to illustrate Diagnostic Mode key strokes.
To initiate Diagnostic Mode, the unit must be ON. With the unit ON, press and hold either
COLDER key, then press
the UNIT ON/OFF key, then release both keys (See Figure 3-42). The left display area will show the real-time tem-
perature of the thermistor being read, the right display area will show the thermistor location code, and all annuncia-
tors will illuminate on the LCD indicating the unit is in Diagnostic Mode. Pressing either
COLDER key while in
Diagnostic Mode will toggle to the next thermistor location. (See Figure 3-43, 3-44, 3-45 below and thermistor loca-
tion code tables on next page)
NOTE: After serial #1759493 (700TC/I-2), #1759163 (700TR-2) and #1757258 (700TF/I-2 & 700TF/I-2V), it is also
possible to toggle through the thermistor locations using the WARMER keys.
NOTE: After serial #1759493 (700TC/I-2), #1759163 (700TR-2) and #1757258 (700TF/I-2 & 700TF/I-2V), If the
COLDER and UNIT ON/OFF keys are pressed and held for 10 seconds, Manual Component Activation Mode will be
initiated (this is covered later in the section).
NOTE: Diagnostic Mode will end 20 seconds after the last key stroke.
Figure 3-42. Initiate Diagnostic Mode - Press and Hold Either COLDER Key, Then the UNIT ON/OFF Key
(“F” Indicates Freezer Compartment)
Figure 3-43. Toggle Through Temperature Readings - Press Either COLDER Key
(“r” Indicates Refrigerator Compartment)
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