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Sub-Zero 700-2 Series

Sub-Zero 700-2 Series
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Page 112
Troubleshooting Guides
Integrated (
Integrated (
700-
700-
2) Series
2) Series
8-6
#3756780 - Revision D - July, 2005
HOW TO USE THE GENERAL TROUBLESHOOTING GUIDE
The table on page 9-8 indicate how the General Trouble Shooting Guide is arranged. Letters “A” through “X” pertain
to the Tall units, letters “AA” through “TT” pertain to Base units. Identify the description of the problem that the unit
is experiencing from the table. To the left of the problem description is a letter. Locate that letter in the left column
of the General Troubleshooting Guide. The center column will identify the possible causes for the problem. The
information in the right column explains the tests to perform and/or action to take to correct the problem. If the unit
is experiencing temperature problems, refer to the instructions below before beginning troubleshooting.
For Tall Unit Temperature Problems - Prior to Serial #1759493 (700TC/I-2), #1759163 (700TR-2) and #1757258
(700TF/I-2 & 700TF/I-2V)
1. Begin troubleshooting by observing compartment set points.
2. If set-points are normal, initiate Diagnostic Mode by pressing and holding either
COLDER key, then press UNIT
ON/OFF key, then release both keys.
NOTE: Diagnostic Mode will end twenty seconds after the last key stroke.
3. Toggle to and observe appropriate evaporator temperature. (See Thermistor Location Code Tables on following
page.)
NOTE: Verify compressor is operating before observing evaporator temperature. If problem is in a refrigerator
section, refrigerator door must be left open for 5 minutes with compressor running.
4. After observing evaporator temperature as instructed above, take note of “Pointers” in first column of trou-
bleshooting guide under problems “A” through “D”. The “Pointers” list what possible causes to check based on
evaporator temperature observed.
NOTE: If compartment temperature history is needed to help diagnose the problem, initiate Temperature Log Recall
Mode. Begin with the unit ON. Now, press and hold the desired compartment WARMER key, then press the UNIT
ON/OFF key, then release both keys. Toggle through the indexes by pressing the WARMER or COLDER key.
For Tall Unit Temperature Problems - Starting with Serial #1759493 (700TC/I-2), #1759163 (700TR-2) and
#1757258 (700TF/I-2 & 700TF/I-2V)
1. Begin troubleshooting by observing compartment set points.
2. If set-points are normal, initiate Diagnostic Mode by pressing and holding either
COLDER key, then press UNIT
ON/OFF key, then release both keys.
NOTE: Diagnostic Mode will end twenty seconds after the last key stroke.
3. When Diagnostic Mode is initiated, check to see if “Error Codes” are present, being sure to toggle through all
error codes and temperature readings by pressing either
COLDER key or either WARMER key. (See Thermistor
Location Code Tables on following page.)
4. If Error Codes are present, refer to Error Code Troubleshooting Guide on previous pages.
5. If there are no Error Codes, initiate Manual Component Activation Mode (which lasts for 5 minutes) by pressing
and holding desired compartment COLDER and UNIT ON/OFF keys for 10 seconds, then observe evaporator
temperatures.
NOTE: Verify that compressor is operating before observing evaporator temperatures. If problem is in a refrig-
erator section, refrigerator door must be left open for 5 minutes with compressor running.
6. After observing evaporator temperature as instructed above, take note of “Pointers” in first column of the trou-
bleshooting guide under problems “A” through “D”. The “Pointers” list what possible causes to check based on
evaporator temperature observed.
NOTE: If compartment and/or evaporator temperature history is needed to help diagnose the problem, initiate
Temperature Log Recall Mode. Begin with the unit ON and in Diagnostic Mode. While in Diagnostic Mode, toggle
through the readings until the desired thermistor temperature is displayed on the LCD. Now, press the WARMER
key for that compartment and the UNIT ON/OFF key simultaneously. Toggle through the indexes by pressing the
WARMER or COLDER key.

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