How To Use Error Code Troubleshooting Guide; Error Code Table - Sub-Zero 700TC-3 Service Manual

Troubleshooting Guides
TROUBLESHOOTING GUIDES
This section of the manual contains:
• The Error Code Table and Error Code Troubleshooting Guide.
• The General Troubleshooting Guide, which covers all problems that a 700-3 Series unit may experience.
• The Membrane Switch/Ribbon Cable Test Procedures, used to determine if a control panel assembly is defective.
• The Door Hinge Test Procedures and Corrections explain how to test and correct door closing problems.
HOW TO USE THE ERROR CODE TROUBLESHOOTING GUIDE
Error Codes are logged for thermistor errors, and/or defrost system errors. A model 700TF/I-3 may also log error
codes for variable speed compressor control system errors. If Error Codes are logged, they will appear when
Diagnostic Mode is initiated.
NOTE: If Error Codes appear with a flashing "SERVICE" indicator prior to initiating Diagnostic Mode, the unit expe-
rienced excessive compressor run condition that may or may not be associated with the Error Codes displayed.
To initiate Diagnostic Mode, press and hold either COLDER key, then press the UNIT ON/OFF key, then release
both keys. Now, check to see if Error Codes are present, being sure to toggle through all error and temperature
readings by pressing either COLDER key or either WARMER key. (See Error Code Table Below)
If Error Codes appear, follow the Error Code Troubleshooting Guide on the following page. The left column of the
troubleshooting guide lists the error codes. The information in the right column explains what tests to perform and/or
what action to take to correct the error.
NOTE: If error codes are observed in diagnostic mode, a non-flashing SERVICE indicator will appear on the LCD
when Diagnostic Mode ends indicating error codes are still stored. Error Codes must be manually cleared from the
electronic control memory. To clear the non-flashing SERVICE indicator and the error codes, the problem must be
corrected and the unit must be ON. Then, press and hold the Door Ajar Alarm Bell ON/OFF key for fifteen (15) sec-
onds. The control will emit a short "beep" when the SERVICE indicator and error codes are cleared.
CODE INDICATION
05 Refrig. cabinet thermistor read open or shorted for 10+ seconds, or repeatedly read erratic temp's
06 Refrig. evaporator thermistor read open or shorted for 10+ seconds, or repeatedly read erratic temp's
07 Freezer cabinet thermistor read open or shorted for 10+ seconds, or repeatedly read erratic temp's
08 Freezer evaporator thermistor read open or shorted for 10+ seconds, or repeatedly read erratic temp's
20 Defrost under-heat with no voltage feedback through Gray/White wire at defrost start
21 Defrost overheat
22 No voltage feedback through Gray/White wire at defrost start
23 Defrost overheat with no voltage feedback through Gray/White wire at defrost start
24 Defrost Under-heat
30 Excessive Icemaker Water Valve Solenoid Activation (Exceeded 15 Seconds)
40 Excessive Freezer Compressor Run
50 Excessive Refrigerator Compressor Run
#3758412 - Revision B - December, 2006
Integrated
Integrated
(700-
(700-

Error Code Table

8-2
3
3 Series
Series
T ALL)
T ALL)