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Sub-Zero Wolf 400 Series Service Manual

Sub-Zero Wolf 400 Series Service Manual

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subzero.com
800.222.7820
400
Service Manual
Troubleshooting Guide
43

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Summary of Contents for Sub-Zero Wolf 400 Series

  • Page 1 subzero.com 800.222.7820 Service Manual Troubleshooting Guide...
  • Page 2: Thermistor Location

    Troubleshooting Guides MODEL 424 MODEL 424 (SWS #3227000) (SWS #3227000) TROUBLESHOOTING GUIDES This section of the manual contains: • Temperature Problem Diagnostic Worksheets • Error Code Tables and the Error Code Troubleshooting Guides • General Troubleshooting Guide • Sealed System Diagnostic Tables •...
  • Page 3 Troubleshooting Guides MODEL 424 MODEL 424 (SWS #3227000) (SWS #3227000) TEMPERATURE PROBLEM DIAGNOSTIC WORKSHEET Temperature Displayed: Lower _________ Upper _________ Set-Point: Lower _________ Upper _________ Diagnostic Mode Thermistor Readings: (Error Codes) _______________________________________ (Upper Evap) ________ (Lower Evap) ________ (Upper Cmprt) ________ (Lower Cmprt)________ Logged Temp.
  • Page 4 Troubleshooting Guides MODEL 424 MODEL 424 (SWS #3227000) (SWS #3227000) TEMPERATURE PROBLEM DIAGNOSTIC WORKSHEET Temperature Displayed: Lower _________ Upper _________ Set-Point: Lower _________ Upper _________ Diagnostic Mode Thermistor Readings: (Error Codes) _______________________________________ (Upper Evap) ________ (Lower Evap) ________ (Upper Cmprt) ________ (Lower Cmprt)________ Logged Temp.
  • Page 5 Troubleshooting Guides MODEL 424 MODEL 424 (SWS #3227000) (SWS #3227000) TEMPERATURE PROBLEM DIAGNOSTIC WORKSHEET Temperature Displayed: Lower _________ Upper _________ Set-Point: Lower _________ Upper _________ Diagnostic Mode Thermistor Readings: (Error Codes) _______________________________________ (Upper Evap) ________ (Lower Evap) ________ (Upper Cmprt) ________ (Lower Cmprt)________ Logged Temp.
  • Page 6 Troubleshooting Guides MODEL 424 MODEL 424 (SWS #3227000) (SWS #3227000) Wine Storage Error Code Troubleshooting Guide Instructions Error Codes indicate problems logged by specific components. If error codes are logged, they will appear before temperature readings while in Diagnostic Mode and they can be toggled through with the temperature readings. 1.
  • Page 7 Troubleshooting Guides MODEL 424 MODEL 424 (SWS #3227000) (SWS #3227000) WINE STORAGE ERROR CODE TROUBLESHOOTING GUIDE Error Code Test / Action EC 05 a. Check upper compartment thermistor electrical connections and continuity from thermistor to J2 on control board. Reconnect / repair connections. b.
  • Page 8 Troubleshooting Guides MODEL 424 MODEL 424 (SWS #3227000) (SWS #3227000) General Troubleshooting Guide The Table of Contents below indicates how the General Trouble Shooting Guide is arranged. 1. As close as possible, match the complaint, or description of the problem the unit is experiencing with those in the table of contents below.
  • Page 9: Test / Action

    Troubleshooting Guides MODEL 424 MODEL 424 (SWS #3227000) (SWS #3227000) PROBLEM POSSIBLE CAUSE TEST / ACTION A. “SERVICE” FLASHING See Error Code Troubleshooting Guide See Error Code Troubleshooting Guide B. WARM TEMPERATURE IN Control Set Too Warm Check set-points. Adjust set-points COLDER BOTH WINE STORAGE COMPARTMENTS Unit in Showroom Mode...
  • Page 10 Troubleshooting Guides MODEL 424 MODEL 424 (SWS #3227000) (SWS #3227000) PROBLEM POSSIBLE CAUSE TEST / ACTION C. WARM TEMPERATURE IN Control Set Too Warm Check/adjust set-points. ONLY ONE WINE STORAGE COMPARTMENT Unit Recently Energized Allow time for unit to pull down Unit Recently Stocked with Wine Instruct customer High Room Ambient Instruct Customer that unit performs best...
  • Page 11 Troubleshooting Guides MODEL 424 MODEL 424 (SWS #3227000) (SWS #3227000) PROBLEM POSSIBLE CAUSE TEST / ACTION D. ACTUAL VS. DISPLAYED Wrong Units of Measure Selected, Initiate Temperature Units Selection Mode to TEMPERATURE OVER 10° (Fahrenheit - °F vs. Celsius - °C) check units of measure (°F or °C) selected. DIFFERENT Compartment Thermistor Fault Check thermistor ohms = 30,000 - 33,000 at...
  • Page 12 Troubleshooting Guides MODEL 424 MODEL 424 (SWS #3227000) (SWS #3227000) PROBLEM POSSIBLE CAUSE TEST / ACTION NO LIGHTS Unit in Sabbath Mode Press & release UNIT ON/OFF key. Door Switch Disconnected or Check switch electrical connections. Check Malfunctioning for power to / from switch. Reconnect or replace switch if defective.
  • Page 13: Normal Operating Pressures

    Troubleshooting Guides MODEL 424 MODEL 424 (SWS #3227000) (SWS #3227000) SEALED SYSTEM DIAGNOSTIC INFORMATION Temperature Pressure NOTE: The temperature/pressure table at right is for refer- -30°F / -34°C 10” Vac / -.69 Bar ence only. A unit's temperature/pressure correlation may -25°F / -32°C 7”...
  • Page 14 Troubleshooting Guides MODEL 424 MODEL 424 (SWS #3227000) (SWS #3227000) WINE STORAGE MEMBRANE SWITCH / RIBBON CABLE TEST PROCEDURE The membrane switch is that part of the control panel assembly consisting of the function keys used for all input functions to the electronic control system. (See Figure 6-1) Perform the eight continuity checks below if the integrity of the membrane switch and/or its ribbon cable is suspect.

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Wolf 424