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Sub-Zero ICB700 T Series - User Manual

Sub-Zero ICB700 T Series
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8-2
Troubleshooting Guides
7005836 - Revision A - January, 2009
International Integrated
International Integrated
(ICB700 T
(ICB700 T
all)
all)
Series
Series
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 an ICB700 Series Tall 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. 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 POWER 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 ALARM key for fifteen (15) seconds. The control will
emit a short “beep” when the SERVICE indicator and error codes are cleared.
Error Code Table
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

Table of Contents

Questions and Answers

  • C
    Caleb DavisAug 30, 2025
    How to fix Error Code 30 on a Sub-Zero Refrigerator?
    • J
      Jacob SchmittAug 31, 2025
      To address Error Code 30 on your Sub-Zero Refrigerator: * Check for a jammed cube in the icemaker. * Use the wiring diagram to identify components in the same white wire circuit as the water valve solenoid. * Inspect all white wire electrical connections and ensure continuity from the water valve solenoid to J7-8 on the control board.
  • V
    vcamachoNov 10, 2025
    What to do if my Sub-Zero Refrigerator shows Error Code 40?
    • E
      Edgar WilliamsNov 10, 2025
      If your Sub-Zero Refrigerator displays Error Code 40, here are some things to check: * If Error Code 07, 20, 21, 22, 23, or 24 is also displayed during Diagnostic Mode, see the Test/Actions for that code. * Ensure there are no obstructions preventing the freezer door/drawer from closing. * Check that the condenser is clean. * Make sure the condenser fan blade is not obstructed or loose. * Verify the evaporator fan blade position and check for any obstructions. * Check the resistance of the freezer compartment thermistor, which should be 30,000 to 33,000 ohms at 0°C (32°F). * With the unit on, confirm that the lights shut off when the light switch is depressed. * With the freezer compressor running, check for 230 V AC from the compressor to the condenser fan. * With the f...
  • L
    Lori ShahNov 21, 2025
    What to do if my Sub-Zero Refrigerator shows Error Code 50?
    • L
      lopezstephanieNov 21, 2025
      If your Sub-Zero Refrigerator displays Error Code 50, here are some things to check: * If Error Code 05 or 06 is also displayed during Diagnostic Mode, see the Test/Actions for that code. * Ensure there are no obstructions preventing the refrigerator door from closing. * Check that the condenser is clean. * Make sure the condenser fan blade is not obstructed or loose. * Verify the evaporator fan blade position and check for any obstructions. * Check the resistance of the refrigerator compartment thermistor, which should be 30,000 to 33,000 ohms at 0°C (32°F). * With the unit on, confirm that the lights shut off when the light switch is depressed. * With the refrigerator compressor running, check for 230 V AC from the control board to the condenser fan. * With the refrige...

Sub-Zero ICB700 T Series Specifications

General IconGeneral
TypeBuilt-In Refrigerator
SeriesT Series
Width36 inches
Height84 inches
Cooling SystemDual Refrigeration
Energy Star CertifiedYes
FinishStainless Steel
ShelvingAdjustable Glass Shelves
LightingLED Lighting
Door SwingReversible
Ice MakerYes
Depth24 inches

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