Page 1 subzero.com 800.222.7820 ICB 400 Service Manual General Information Installation Information Controls & Operation Sealed System Air Flow & Fan Blade Spacing Component Access & Removal Troubleshooting Guide Technical Data LOKRING Information Wiring Diagrams...
Page 2 International W ine Storage Series International W ine Storage Series General Information (ICB400) (ICB400) INTRODUCTION This Technical Service Manual has been compiled to provide the most recent service information for ICB400 Series units. This information will enable the service technician to troubleshoot and diagnose malfunctions, perform neces- sary repairs, and return a unit to proper operational condition.
Page 3 International W ine Storage Series International W ine Storage Series General Information (ICB400) (ICB400) WARRANTY INFORMATION The ICB400 Series carries no factory warranty. However, the Product Distributor or the Appliance Dealer may offer their own warranty. For this reason the model and serial number may be important information. See Serial Tag Layout diagram below.
Page 4 International W ine Storage Series International W ine Storage Series General Information (ICB400) (ICB400) MODEL DESCRIPTIONS This section briefly describes the models covered in this ICB400 Series Technical Service Manual. There are three basic model configurations (Models ICB424, ICB427 and ICB427R), with esthetic variations of the exterior cosmetic components.
Page 5 International W ine Storage Series International W ine Storage Series General Information (ICB400) (ICB400) NOTE: Door panels for this model sold Figure 1-5. Model ICB427R separately. ICB427RG • ICB400 Series - 27” Wide - Refrigerated Drawers - Glass Door on Wine Storage Section ICB427RS •...
Page 6 International W ine Storage Series International W ine Storage Series General Information (ICB400) (ICB400) Sub-Zero Wine Storage Temperature Range, Recommended Wine Storage Temperatures and Recommended Wine Serving Temperatures: he table below shows the temperature range of the Sub-Zero Wine Storage Units. This table also shows the rec- ommended temperatures for “serving”...
Page 7 International W ine Storage Series International W ine Storage Series Installation Information (ICB400) (ICB400) INSTALLATION CONSIDERATIONS This section covers common installation issues seen by Service Technicians. Improper installation, though not a valid service issue, has the potential to lead to a call for service. Installation related complaints could include, but are not limited to: Unit leveling, unit movement, door misalignment, improper door and drawer sealing, internal frost or condensation, exterior condensation, warm compartment temperatures, etc.
Page 8 International W ine Storage Series International W ine Storage Series Installation Information (ICB400) (ICB400) Unit Leveling (ICB424, ICB424FS) NOTE: Model ICB424 must be leveled before installing into rough-in opening. If unit is already installed and anchored with countertop bracket (See Figure 2-3), Countertop Bracket Extract anchor screws before leveling, reinstalled after.
Page 9 International W ine Storage Series International W ine Storage Series Installation Information (ICB400) (ICB400) Unit Leveling (ICB427 & ICB427R) NOTE: Unit must be installed before final leveling. If unit is anchored to cabinets, remove anchor screws before leveling, reinstalled after (See Figure 2-5).
Page 10 International W ine Storage Series International W ine Storage Series Installation Information (ICB400) (ICB400) Door Adjustment (ICB424, ICB424FS) NOTE: Unit must be level before adjusting door. 1. Remove NOTE: If ICB424FS door needs adjusting, stainless 2. Slide back brackets. steel wrap must be removed to adjust top cabinet hinge wrap (See Figure 2-9).
Page 11 International W ine Storage Series International W ine Storage Series Installation Information (ICB400) (ICB400) Door Stop Adjustment (ICB427 & ICB427R) Models ICB427 and ICB427R have a 90° door stop cam built into the hinge system. The 90° door stop cam is located in the center portion of the hinge.
Page 12 International W ine Storage Series International W ine Storage Series Installation Information (ICB400) (ICB400) Door Panel Removal and Installation (All Models) Hinge Pin METAL DOOR PANELS MAY HAVE SHARP EDGES. Door Closer PROTECTIVE GLOVES SHOULD BE WORN WHEN HANDLING PANELS. DOOR PANELS MAY BE HEAVY OR UNSTABLE.
Page 13 International W ine Storage Series International W ine Storage Series Installation Information (ICB400) (ICB400) Overlay Door Panel Removal and Installation Door Frame Door Gasket (ICB424) Overlay panels are attached to the door using screws passing through the door frame from the rear, into the Poly Tape panel.
Page 14 International W ine Storage Series International W ine Storage Series Installation Information (ICB400) (ICB400) Door Panel Removal and Installation Door Frame Door Gasket (ICB427 & ICB427R) Models ICB427 and ICB427R are NOT supplied with panels from the factory. Panels are purchased sepa- Poly Tape rately.
Page 15 International W ine Storage Series International W ine Storage Series Electronic Control System (ICB400) (ICB400) WINE STORAGE ELECTRONIC CONTROL TERMINOLOGY & COMPONENT DESCRIPTIONS The electronic control system monitors, regulates and controls a variety of functions; it also displays temperatures, possible problems with the appliance and the temperature alarm status. The table below defines some basic electronic control terminology.
Page 16 International W ine Storage Series International W ine Storage Series Electronic Control System (ICB400) (ICB400) BASIC WINE STORAGE ELECTRONIC CONTROL SYSTEM This page contains a basic illustration of the ICB400 Series electronic control system (See Figure 3-1). Input opera- tions are performed at the membrane switch (part of the the control panel assembly), with monitoring, regulating and controlling functions taking place at the control board (located directly behind the control panel).
Page 17 International W ine Storage Series International W ine Storage Series Electronic Control System (ICB400) (ICB400) WINE STORAGE CONTROL BOARD LAYOUT AND SUMMARY TABLE The electrical connection points on the wine storage control board are labeled Alphanumerically. These labels correspond with the alphanumeric control board summary layout table on the wiring dia- gram.
Page 18 International W ine Storage Series International W ine Storage Series Electronic Control System (ICB400) (ICB400) WINE STORAGE CONTROL PANEL LAYOUT Upper Compartment COLDER WARMER ALARM & POWER Upper SERVICE ALARM ON/OFF ON/OFF Compartment indicators Temp Reading Lower LIGHTS Compartment ON/OFF Temp Reading WARMER COLDER...
Page 19 International W ine Storage Series International W ine Storage Series Electronic Control System (ICB400) (ICB400) Adjusting Set-Points (Temperature Adjustments) To adjust set-points, press WARMER or COLDER key on control panel in multiple key strokes until desired set-point is achieved (See Figure 3-6). One key stroke equals one degree (1°) change.
Page 20 International W ine Storage Series International W ine Storage Series Electronic Control System (ICB400) (ICB400) UNIQUE WINE STORAGE INPUT OPERATIONS The following pages illustrate unique input operations performed at the control panel, namely: Temperature Units Selection Mode, Sabbath Mode and Showroom Mode. Temperature Units Selection Mode (Selecting Degrees Celsius or Degrees Fahrenheit Display) The electronic control is initially set to display temperature in Celsius (°C) units of measure.
Page 21 International W ine Storage Series International W ine Storage Series Electronic Control System (ICB400) (ICB400) Sabbath Mode (Lights Off Mode) Sabbath Mode was incorporated into the electronic control system for the observance of certain religious days. Initiating Sabbath Mode disables the LEDs and lighting system. To initiate Sabbath Mode, the unit must first be switched OFF using the POWER key (See Figure 3-11), then press...
Page 22 International W ine Storage Series International W ine Storage Series Electronic Control System (ICB400) (ICB400) FUNCTION OF THE WINE STORAGE ELECTRONIC CONTROL SYSTEM The following pages explain monitoring, regulating and controlling functions of the electronic control system. In most cases signal traces for the ICB424 wiring schematic are used to show current flow for functions being explained. TO AVOID ELECTRIC SHOCK, POWER TO THE UNIT MUST BE DISCONNECTED WHENEVER ACCESSING AND/OR REMOVING COMPONENTS POWERED BY ELECTRICITY OR COMPONENTS NEAR OTHER ELEC- TRICAL COMPONENTS.
Page 23 International W ine Storage Series International W ine Storage Series Electronic Control System (ICB400) (ICB400) Display Average Compartment Temperatures The temperature signal from the thermistor in each compartment is monitored by the microprocessor, then displayed in the control panel display. The LED arrow closest to the appropriate display window indicates which compartment (upper or lower) the temperature is associated with.
Page 24 International W ine Storage Series International W ine Storage Series Electronic Control System (ICB400) (ICB400) Control Compressor, Condenser Fan, Dual Refrigerant Valve and Evaporator Fan Motors The control senses evaporator and compartment temperatures via thermistors; one on each evaporator, and one in each compartment.
Page 25 International W ine Storage Series International W ine Storage Series Electronic Control System (ICB400) (ICB400) Monitor and Control Off-cycle Defrost Since High Offset (Cut-in) is governed by the evaporator temperature, the refrigeration system cannot be energized until evaporator temperatures exceed 4°C (39°F), with a 3°C (38°F) set-point, and/or exceed 19°C (66°F), with a 18°C (65°F) set-point.
Page 26 International W ine Storage Series International W ine Storage Series Electronic Control System (ICB400) (ICB400) POSSIBLE WINE STORAGE ERROR INDICATORS All wine storage units are equipped with an audio-visual temperature alarm feature, as well as low voltage wiring provisions to allow the alarm to be tied into a home security alarm system. This section explains the temperature alarm feature and the audio and/or visual error indicators that may alert a customer of a malfunction.
Page 27 International W ine Storage Series International W ine Storage Series Electronic Control System (ICB400) (ICB400) Cold Temperature Alarm A cold temperature alarm can occur if either wine storage compartment remains below 3°C (38°F) for too long, caus- ing several consecutive maximum run-time cycles. During a cold temperature alarm, cold temperature readings may be displayed at the control panel, the SERVICE indicator will flash (See Figure 3-22).
Page 28 International W ine Storage Series International W ine Storage Series Electronic Control System (ICB400) (ICB400) Thermistor Malfunction Error Indicators The diagrams below illustrating what a customer may see on the display if there is a thermistor fault, such as a short or open condition (See Figures 3-25, 3-26, 3-27).
Page 29 International W ine Storage Series International W ine Storage Series Electronic Control System (ICB400) (ICB400) WINE STORAGE TROUBLESHOOTING INPUT OPERATIONS The following few pages explain troubleshooting input operations performed at the control panel, namely: Diagnostic Mode, Manual Valve 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.
Page 30 International W ine Storage Series International W ine Storage Series Electronic Control System (ICB400) (ICB400) Diagnostic Mode Indicators If “EE” is observed in the left display area during Diagnostic Mode - The thermistor, or its wiring in the location indicated by the code at right is open or shorted (See Figure 3-32).
Page 31 International W ine Storage Series International W ine Storage Series Electronic Control System (ICB400) (ICB400) Manual Valve Activation Mode Manual Valve Activation Mode forces the refrigerant valve to open (feeding refrigerant to the desired evaporator), and energizes the appropriate evaporator fan motor, as well as the compressor and condenser fan motor. Once ini- tiated, this mode lasts for five (5) minutes, during which time the evaporator temperature for that compartment is dis- played at the control panel.
Page 32 International W ine Storage Series International W ine Storage Series Electronic Control System (ICB400) (ICB400) Temperature Log Recall Mode The electronic control system is equipped with a temperature history data storage system. This system logs/stores the average temperature of each individual thermistor every four hours, along with any event indicators (explained later in this section), that may have occurred.
Page 33 International W ine Storage Series International W ine Storage Series Electronic Control System (ICB400) (ICB400) Temperature Log Event Indicators The diagrams below illustrate possible event indicators that may be observed while in Temperature Log Recall Mode. (See Figures 3-39 through 3-41) Figure 3-39.
Page 34 International W ine Storage Series International W ine Storage Series Electronic Control System (ICB400) (ICB400) WINE STORAGE TEMPERATURE LOG INDEX CHART Index # Previous Hours Time Frame Index # Previous Hours Time Frame Index # Previous Hours Time Frame 4 Hours 92 Hours 180 Hours 8 Hours...
Page 35 International W ine Storage Series International W ine Storage Series Electronic Control System (ICB400) (ICB400) MODEL ICB427R REFRIGERATOR SECTION ELECTRONIC CONTROL TERMINOLOGY & COMPONENT DESCRIPTIONS The table below defines some of the basic electronic control system terminology. Term/Component Definition / Description Main Control Board ..……..……...
Page 36 International W ine Storage Series International W ine Storage Series Electronic Control System (ICB400) (ICB400) MODEL ICB427R REFRIGERATOR SECTION ELECTRONIC CONTROL SYSTEM OVERVIEW This page contains the wiring schematic for the refrigerator section of the model ICB427R. Input operations for the electronic control system are performed at the control panel (located inside the upper drawer), with monitoring, regu- lating and controlling functions taking place at the main control board.
Page 37 International W ine Storage Series International W ine Storage Series Electronic Control System (ICB400) (ICB400) MODEL ICB427 REFRIGERATOR SECTION CONTROL BOARD LAYOUT AND SUMMARY TABLE Electrical connection points on the control board are labeled alphanumerically. These labels correspond with the alphanumeric summary table, located on the wiring diagram.
Page 38 International W ine Storage Series International W ine Storage Series Electronic Control System (ICB400) (ICB400) MODEL ICB427R REFRIGERATOR SECTION CONTROL PANEL LAYOUT NOTE: The LCD is not back lit. It will appear darker than the LED’s in the wine section. REFRIGERATOR SET-POINT DRAWER AJAR (Liquid Crystal Display)
Page 39 International W ine Storage Series International W ine Storage Series Electronic Control System (ICB400) (ICB400) MODEL ICB427R REFRIGERATOR SECTION BASIC INPUT OPERATIONS The following few pages describe the basic input operations performed at the ICB427R control panel (switching the unit ON or OFF; adjusting set-point (temperature adjustment); enabling and disabling door ajar alarm feature). Please note that though possible to display temperatures in Celsius or Fahrenheit, in most cases Celsius readings are shown.
Page 40 International W ine Storage Series International W ine Storage Series Electronic Control System (ICB400) (ICB400) Drawer Ajar Alarm ON/OFF When the drawer ajar alarm feature is activated, the alarm will alert a customer if a drawer is stuck open, or acciden- tally left open.
Page 41 International W ine Storage Series International W ine Storage Series Electronic Control System (ICB400) (ICB400) Sabbath Mode Sabbath Mode was incorporated into the electronic control system for the observance of certain religious days. Initiating Sabbath Mode disables the LCD, lighting system and the door ajar alarm feature. To initiate Sabbath Mode, the unit must first be switched OFF using the POWER key (See Figure 3-50), then press...
Page 42 International W ine Storage Series International W ine Storage Series Electronic Control System (ICB400) (ICB400) FUNCTIONS OF MODEL ICB427R REF. SECTION ELECTRONIC CONTROL SYSTEM The following few pages explain monitoring, regulating and controlling functions of the electronic control system. Display Zone Temperatures Temperature signals from the compartment thermistor are monitored by the microprocessor, then displayed on the LCD.
Page 43 International W ine Storage Series International W ine Storage Series Electronic Control System (ICB400) (ICB400) Regulate Zone Temperature and Fan-Assisted Off-Cycle Defrost When the thermistor in the refrigerator compartment reaches high off-set temperature, calling for cooling, the evapo- rator fan is energized, but the compressor is not allowed to run until the thermistor on the evaporator reaches 3°C (38°F).
Page 44 International W ine Storage Series International W ine Storage Series Electronic Control System (ICB400) (ICB400) Monitor Compressor Run Duration, Displays If Service is Needed The microprocessor observes the state of the compressor relay to determine the length of compressor run time (See Figure 3-57).
Page 45 International W ine Storage Series International W ine Storage Series Electronic Control System (ICB400) (ICB400) POSSIBLE ICB427R REFRIGERATOR SECTION ERROR INDICATORS The diagrams on this page illustrate what a customers may see on the LCD if a problem/error exists with the unit. NOTE: To clear indicators and error codes, problem must be corrected then press ALARM key for fifteen (15) sec- onds.
Page 46 International W ine Storage Series International W ine Storage Series Electronic Control System (ICB400) (ICB400) MODEL ICB427R REFRIGERATOR SECTION TROUBLESHOOTING INPUT OPERATIONS The following few pages explain troubleshooting input operations performed at the control panel. The input opera- tions 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.
Page 47 International W ine Storage Series International W ine Storage Series Electronic Control System (ICB400) (ICB400) Diagnostic Mode Indicators If “EE” is observed in left display area during Diagnostic Mode, the thermistor in that location is open or shorted, or there is a break in that thermistor’s wiring (See Figure 3-66).
Page 48 International W ine Storage Series International W ine Storage Series Electronic Control System (ICB400) (ICB400) Clearing Error Codes - 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 (See Figure 3-69).
Page 49 International W ine Storage Series International W ine Storage Series Electronic Control System (ICB400) (ICB400) Temperature Log Recall Mode The electronic control system is equipped with a temperature history data storage system. This system logs/stores the average temperature of each individual thermistor every two hours, along with any event indicators (explained later in this section), that may have occurred.
Page 50 International W ine Storage Series International W ine Storage Series Electronic Control System (ICB400) (ICB400) To View Compartment and Evaporator Temperature History - Begin with the unit ON and in Diagnostic Mode (See Figure 3-76). While in Diagnostic Mode, toggle through the readings until the desired thermistor temperature is displayed on the LCD (See Figure 3-77).
Page 51 International W ine Storage Series International W ine Storage Series Electronic Control System (ICB400) (ICB400) Temperature Log Event Indicators The diagrams below illustrate possible event indicators that may be observed while in Temperature Log Recall Mode. (Also see Temperature Log Index Chart on next page) Figure 3-82.
Page 52 International W ine Storage Series International W ine Storage Series Electronic Control System (ICB400) (ICB400) Temperature Log Index Chart NOTE : The chart below applies to the hours in which the control has power. Temperature history data will only be stored when the control has 230V AC supplied to it.
Page 53 International W ine Storage Series International W ine Storage Series Electronic Control System (ICB400) (ICB400) MODEL ICB427R REFRIGERATOR SECTION SERVICE INPUT OPERATIONS Model Configuration Mode The main control board is used in several different models, so when a ICB427R Unit is manufactured, the main con- trol board must be configured/programmed by a series of key strokes at the control panel.
Page 54 International W ine Storage Series International W ine Storage Series Electronic Control System (ICB400) (ICB400) Manual Entry Model Configuration Mode Manual Entry Model Configuration Mode allows a Service Technician to verify a main control board of the ICB427R refrigerator section was configured correctly, and/or to reconfigure the main control board if a mistake was made during the configuration process.
Page 55 International W ine Storage Series International W ine Storage Series Sealed System Information (ICB400) (ICB400) HFC-134a REFRIGERANT SERVICE INFORMATION The sealed system contains HFC-134a refrigerant. This section gives some general rules for working with 134a, and explains procedures to be followed while servicing the sealed system. 134a refrigerant requires synthetic Ester oil in the compressor, and does not tolerate contamination from other refrigerants, moisture, petroleum-based lubricants, silicone lubricants, cleaning compounds, rust inhibitors, leak detection dyes, or any other type of additive.
Page 56 International W ine Storage Series International W ine Storage Series Sealed System Information (ICB400) (ICB400) WINE STORAGE SEALED SYSTEM REPAIR PROCEDURES Problem Service Procedures Non-Operating, Inefficient, Capture refrigerant Noisy Compressor Replace Compressor Replace filter-drier (NOTE: To check for a non- Evacuate or sweep charge system operating compressor, a hard NOTE:...
Page 57 International W ine Storage Series International W ine Storage Series Sealed System Information (ICB400) (ICB400) WINE STORAGE SEALED SYSTEM FRAME HEATER (HOT GAS) The following six diagrams illustrate a basic wine stor- age sealed system. The components are listed in order of refrigerant flow, with an explanation of their funda- mental role as part of a sealed system.
Page 58 International W ine Storage Series International W ine Storage Series Sealed System Information (ICB400) (ICB400) Capillary Tube(s) (Figure 4-4) FRAME HEATER (HOT GAS) The high-pressure warm liquid refrigerant travels through the long skinny capillary tube which is soldered CAPILLARY TUBE to the suction tube (these two tubes soldered together create the heat exchanger).
Page 59 International W ine Storage Series International W ine Storage Series Sealed System Information (ICB400) (ICB400) Model ICB427R Refrigerator Sealed System Components and Their Role: Compressor (Figure 4-7) The compressor creates a high side and low side pres- sure difference in the sealed system by compressing the refrigerant gas, thus raising the pressure and tem- perature.
Page 60 International W ine Storage Series International W ine Storage Series Sealed System Information (ICB400) (ICB400) CAPILLARY TUBE Capillary Tube (Figure 4-10) CONDENSER As the warm liquid refrigerant travels through the capil- lary tube the pressure drops, cooling the liquid before it enters the evaporator.
Page 61 International W ine Storage Series International W ine Storage Series Sealed System Information (ICB400) (ICB400) REFRIGERANT FLOW DIAGRAMS Frame Heater (Hot Gas) Upper Heat Exchanger Upper Compartment Evaporator Lower Heat Exchanger Lower Compartment Evaporator “T” Connection Condenser Filter-Drier Compressor Dual Refrigerant Valve Figure 4-13.
Page 62 International W ine Storage Series International W ine Storage Series Sealed System Information (ICB400) (ICB400) Frame Heater (Hot Gas) Upper Wine Heat Exchanger Upper Wine Evaporator Lower Wine Heat Exchanger Lower Wine Evaporator Refrig Heat Exchanger Refrigerator Evaporator Condenser Refrigerator Filter-Drier Wine Compressor Refrigerator Compressor Dual Refrigerant Valve with Filter-Drier...
Page 63 International W ine Storage Series International W ine Storage Series Air Flow / Fan Blade Spacing (ICB400) (ICB400) AIR FLOW / EVAPORATOR FAN-BLADE SPACING 2.22 cm ± .16 cm (7/8" ± 1/16") 2.22 cm ± .16 cm (7/8" ± 1/16") CLAMP FORWARD CLAMP FORWARD Figure 5-1.
Page 64 International W ine Storage Series International W ine Storage Series Air Flow / Fan Blade Spacing (ICB400) (ICB400) 2.22 cm ± .16 cm (7/8" ± 1/16") 2.22 cm ± .16 cm (7/8" ± 1/16") CLAMP FORWARD 2.22 cm ± .16 cm (7/8"...
Page 65: Table Of Contents
International W ine Storage Series International W ine Storage Series Component Access / Removal (ICB400) (ICB400) COMPONENT ACCESS AND REMOVAL This section explains how to adjust, access and remove ICB400 Series unit components. Due to the diversity of the ICB400 Series, this section is divided into three sub-sections arranged as follows: Section 6 Table of Contents Page # Model ICB424 ................................6-3...
Page 66: Model Icb424
International W ine Storage Series International W ine Storage Series Component Access / Removal (ICB400) (ICB400) MODEL ICB424 MODEL ICB424 EXTERIOR COSMETIC AND MECHANICAL COMPONENTS Kickplate Removal (Model ICB424) To remove the kickplate, extract the mounting screws located at each end of the kickplate and pull the kick- Kickplate Mounting Screw plate forward.
Page 67 International W ine Storage Series International W ine Storage Series Component Access / Removal (ICB400) (ICB400) Light and Fan Switch Removal (Model ICB424) The light switch and fan switches are attached to a switch bracket, then covered by a switch guard. The switch bracket and guard are held in place by two Fan Switches Phillips head screws that pass up through holes in the...
Page 68 International W ine Storage Series International W ine Storage Series Component Access / Removal (ICB400) (ICB400) MODEL ICB424 INTERIOR COSMETIC AND MECHANICAL COMPONENTS Wine Rack Assembly Removal To remove a wine rack assembly (See Figure 6-7): 1. Pull rack forward until it stops. 2.
Page 69 International W ine Storage Series International W ine Storage Series Component Access / Removal (ICB400) (ICB400) Upper and Lower Evaporator Fan Cover Removal Screw Evaporator Cover (Model ICB424) There are two access holes in the front of the evapora- tor fan cover, and notches in the back flanges of the fan cover.
Page 70 International W ine Storage Series International W ine Storage Series Component Access / Removal (ICB400) (ICB400) Control Board Access and Removal (Model ICB424) The control board is located behind the control panel, at the bottom side of the compartment divider, and is con- cealed by an access panel assembly.
Page 71 International W ine Storage Series International W ine Storage Series Component Access / Removal (ICB400) (ICB400) Lower Light Strip Access and Removal (Model ICB424 Starting with Serial #3100000) NOTE: Prior to Serial number 3100000, there was no Control Panel Assy lower light strip in this model Light Strip Housing The lower light strip is captivated in the channel of the...
Page 72 International W ine Storage Series International W ine Storage Series Component Access / Removal (ICB400) (ICB400) Evaporator Thermistors (Model ICB424) Screw & P-Clamp The evaporator thermistors are attached to the right side evaporator brackets (one thermistor each evapora- tor), with a screw. Upper Evaporator Thermistor: To remove the upper evaporator thermistor, first remove the cabinet slides, spacers, support spacers, evaporator fan cover and...
Page 73: Unit Tray Mechanical Components
International W ine Storage Series International W ine Storage Series Component Access / Removal (ICB400) (ICB400) MODEL ICB424 UNIT TRAY MECHANICAL COMPONENTS Condenser Fan Assembly Removal (Model ICB424) Grounding Screw The condenser fan motor is secured to the condenser bracket with screws. The bracket is secured to the unit tray by screws passing up from under the unit tray into threaded stand-offs.
Page 74 International W ine Storage Series International W ine Storage Series Component Access / Removal (ICB400) (ICB400) MODEL ICB424 SEALED SYSTEM COMPONENTS NOTE: To remove any sealed system component from a Model ICB424, the unit must be pulled from its installation. NOTE: If removing a model ICB424 from its installation, an anti-tip bracket and a countertop bracket may have been used to make a solid installation.
Page 75 International W ine Storage Series International W ine Storage Series Component Access / Removal (ICB400) (ICB400) Refrigerant Valve Assembly (Includes Filter-Drier) Removal (Model ICB424) The refrigerant valve assembly is secured to the valve bracket with screws. To access the refrigerant valve assembly, the unit will need to be pulled from its installation.
Page 76 International W ine Storage Series International W ine Storage Series Component Access / Removal (ICB400) (ICB400) Condenser Removal (Model ICB424) Inlet The condenser is located at the front right of the unit tray, and is held in place with screws, or rivets passing up from under the unit tray into the condenser brackets.
Page 77: Models Icb427, Icb427R
International W ine Storage Series International W ine Storage Series Component Access / Removal (ICB400) (ICB400) MODELS ICB427 AND ICB427R MODELS ICB427 AND ICB427R EXTERIOR COSMETIC AND MECHANICAL COMPONENTS Kickplate/Grille Removal (Models ICB427 & ICB427R) The kickplate/grille is attached by four screws passing through the kickplate into adjustable kickplate brackets.
Page 78 International W ine Storage Series International W ine Storage Series Component Access / Removal (ICB400) (ICB400) Drawer Assembly Removal (Model ICB427R Only) There are inverted channels on both sides of the draw- er tubs which rest on telescoping drawer slide assem- Hole in Channel blies.
Page 79 International W ine Storage Series International W ine Storage Series Component Access / Removal (ICB400) (ICB400) Door Assembly Removal (Models ICB427 & Remove two inner-most ICB427R) screws at top and bottom hinge with door open. Remove two outer-most The door assembly is held in place with Allen-head screws at bottom hinge screws that pass down through the arm of the top hinge first then at top, with door...
Page 80 International W ine Storage Series International W ine Storage Series Component Access / Removal (ICB400) (ICB400) MODELS ICB427 AND ICB427R INTERIOR COSMETIC AND MECHANICAL COMPONENTS Wine Rack Assembly Removal To remove a wine rack assembly (See Figure 6-38): 1. Pull rack forward until it stops. 2.
Page 81 International W ine Storage Series International W ine Storage Series Component Access / Removal (ICB400) (ICB400) Evaporator Fan Cover Removal Screw Access Hole There are two access holes in an evaporator fan cover, through which pass screws. These screws also pass through slots in the back flanges of the fan cover, and through holes in the evaporator cover, into screw grom- Duct opening at top...
Page 82 International W ine Storage Series International W ine Storage Series Component Access / Removal (ICB400) (ICB400) Wine Storage Evaporator Fan Assembly Removal Fan Motor (Model ICB427 & ICB427R) Motor Mounting The wine storage evaporator fan assemblies are Screws attached to the rear wall of each wine compartment with screws.
Page 83 International W ine Storage Series International W ine Storage Series Component Access / Removal (ICB400) (ICB400) Wine Storage Control Panel Assembly Removal Do not break (Models ICB427 & ICB427R) concealed The control panel assembly is secured at the front of the wine compartment divider with six screws at the bottom and a silicone seal under the top flange.
Page 84 International W ine Storage Series International W ine Storage Series Component Access / Removal (ICB400) (ICB400) Refrigerator Control Panel Assembly Removal Screws (Model ICB427R Only) The control panel assembly is attached inside top draw- er assembly with three screws. To remove control panel assembly (See Figure 6-49): 1.
Page 85 International W ine Storage Series International W ine Storage Series Component Access / Removal (ICB400) (ICB400) Refrigerator Wire Tray Removal (Model ICB427R Only) Wire Tray The wire tray is rests on pegs at the left and at the back right corner of the duct cover. It is set between the two drawer areas.
Page 86 International W ine Storage Series International W ine Storage Series Component Access / Removal (ICB400) (ICB400) Refrigerator Control Board Access and Removal (Model ICB427R Only) The refrigerator control board is attached to a control board cover, located in the ceiling of the refrigerator section.
Page 87 International W ine Storage Series International W ine Storage Series Component Access / Removal (ICB400) (ICB400) Refrigerator Fan Motor Removal Refrigerator (Model ICB427R Only) Fan Motor The refrigerator fan motor is held to a bracket with screws passing through the motor into screw grommets that are attached to the bracket.
Page 88 International W ine Storage Series International W ine Storage Series Component Access / Removal (ICB400) (ICB400) Refrigerator Evaporator Thermistor Removal (Model ICB427R Only) The refrigerator evaporator thermistor is inserted into the third opening from the top in the evaporator fins left side, extending approximately to the center of the evaporator.
Page 89: Unit Tray Mechanical Components
International W ine Storage Series International W ine Storage Series Component Access / Removal (ICB400) (ICB400) MODELS ICB427 AND ICB427R UNIT TRAY MECHANICAL COMPONENTS Refrigerant Valve Assembly Solenoid Removal Pry top open (Models ICB427 & ICB427R) Pry bottom open The solenoid is part of the refrigerant valve assembly, which is secured to the unit tray with screws.
Page 90: Sealed System Components
International W ine Storage Series International W ine Storage Series Component Access / Removal (ICB400) (ICB400) MODELS ICB427 AND ICB427R SEALED SYSTEM COMPONENTS NOTE: Always replace the refrigerant valve assembly (which includes the filter-drier), when servicing a wine storage sealed system. On the model ICB427R, Always replace the high-side filter-drier when servicing the refrigerator sealed system.
Page 91 International W ine Storage Series International W ine Storage Series Component Access / Removal (ICB400) (ICB400) Refrigerator High-Side Filter-Drier Removal Cut 25 mm (1”) (Model ICB427R Only) from drier To remove the high-side filter-drier it may help to slide the unit tray out slightly, then (See Figure 6-64): 1.
Page 92 International W ine Storage Series International W ine Storage Series Component Access / Removal (ICB400) (ICB400) Compressor Access and Removal (Models ICB427 & ICB427R) To remove a compressor, the unit tray will need to be Compressor pulled out, then (See Figure 6-66): 1.
Page 93 International W ine Storage Series International W ine Storage Series TroubleShoot Guide (ICB400) (ICB400) TROUBLESHOOTING GUIDES This section of the manual contains: • Temperature Problem Diagnostic Worksheets (does not apply to ICB427R refrigerator section) • Error Code Tables and the Error Code Troubleshooting Guides •...
Page 94 International W ine Storage Series International W ine Storage Series TroubleShoot Guide (ICB400) (ICB400) TEMPERATURE PROBLEM DIAGNOSTIC WORKSHEET Temperature Displayed: Lower _________ Upper _________ Set-Point: Lower _________ Upper _________ E E C C Diagnostic Mode Thermistor Readings: (Error Codes) _______________________________________ U U E E L L E E U U P P...
Page 95 International W ine Storage Series International W ine Storage Series TroubleShoot Guide (ICB400) (ICB400) TEMPERATURE PROBLEM DIAGNOSTIC WORKSHEET Temperature Displayed: Lower _________ Upper _________ Set-Point: Lower _________ Upper _________ E E C C Diagnostic Mode Thermistor Readings: (Error Codes) _______________________________________ U U E E L L E E U U P P...
Page 96 International W ine Storage Series International W ine Storage Series TroubleShoot Guide (ICB400) (ICB400) TEMPERATURE PROBLEM DIAGNOSTIC WORKSHEET Temperature Displayed: Lower _________ Upper _________ Set-Point: Lower _________ Upper _________ E E C C Diagnostic Mode Thermistor Readings: (Error Codes) _______________________________________ U U E E L L E E U U P P...
Page 97 International W ine Storage Series International W ine Storage Series TroubleShoot Guide (ICB400) (ICB400) Wine Storage Error Code Troubleshooting Guide Instructions Error Codes indicate problems registered by specific components. If error codes are registered, they will appear before temperature readings while in Diagnostic Mode. 1.
Page 98 International W ine Storage Series International W ine Storage Series TroubleShoot Guide (ICB400) (ICB400) WINE STORAGE ERROR CODE TROUBLESHOOTING GUIDE Error Code Test / Action Check upper compartment thermistor electrical connections and continuity from thermistor to J2 on control board. Reconnect / repair connections. Check resistance of upper compartment thermistor for 30,000 to 33,000 ohms at 0°C (32°F).
Page 99 International W ine Storage Series International W ine Storage Series TroubleShoot Guide (ICB400) (ICB400) Model ICB427R Refrigerator Error Code Troubleshooting Guide Instructions Error Codes indicate problems registered by specific components. If error codes are registered, they will appear before temperature readings while in Diagnostic Mode. 1.
Page 100 International W ine Storage Series International W ine Storage Series TroubleShoot Guide (ICB400) (ICB400) 427R-2 REFRIGERATOR COMPARTMENT ERROR CODE TROUBLESHOOTING GUIDE TEST / ACTION A. If “EE” for refrigerator compartment was displayed and “SERVICE” flashing, check the following: Thermistor electrical connections and continuity from thermistor to control board. Reconnect / repair. Resistance of thermistor - 30,000 to 33,000 ohms at 0°C (32°F).
Page 101 International W ine Storage Series International W ine Storage Series TroubleShoot Guide (ICB400) (ICB400) 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 102: Service" Flashing
International W ine Storage Series International W ine Storage Series TroubleShoot Guide (ICB400) (ICB400) 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.
Page 103: Warm Temperature In Only One Wine Storage Compartment
International W ine Storage Series International W ine Storage Series TroubleShoot Guide (ICB400) (ICB400) 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...
Page 104: Actual Vs. Displayed Temperature Over 10° Different
International W ine Storage Series International W ine Storage Series TroubleShoot Guide (ICB400) (ICB400) PROBLEM POSSIBLE CAUSE TEST / ACTION D. ACTUAL VS. DISPLAYED Wrong Units of Measure Selected, Initiate Temperature Units Selection Mode to TEMPERATURE OVER 10° (Celsius - °C vs. Fahrenheit - °F) check units of measure (°C or °F) selected.
Page 105: Control Panel Keys Malfunctioning
International W ine Storage Series International W ine Storage Series TroubleShoot Guide (ICB400) (ICB400) PROBLEM POSSIBLE CAUSE TEST / ACTION J. CONTROL PANEL KEYS Control Panel Ribbon Cable Plugged in Check control panel ribbon cable at control MALFUNCTIONING Wrong panel (silver area of terminal away from con- trol board).
Page 106: Ee" Displayed In Place Of Refrigerator Temperature With "Service" Flashing
International W ine Storage Series International W ine Storage Series TroubleShoot Guide (ICB400) (ICB400) PROBLEM POSSIBLE CAUSE TEST / ACTION P. “EE” Displayed in place of Refrigerator Compartment Thermistor Check refrigerator compartment thermistor Refrigerator Temperature Disconnected, Shorted, or misread electrical connections from thermistor to with “SERVICE”...
Page 107: Warm Refrigerator Temperatures, "Service" Not Displayed Or Flashing
International W ine Storage Series International W ine Storage Series TroubleShoot Guide (ICB400) (ICB400) PROBLEM POSSIBLE CAUSE TEST / ACTION (Continued) Refrigerator Compartment Fan Fault T. Warm Refrigerator Temperatures, “SERVICE” a. Fan blade obstructed or out of position a. Move obstruction or reposition blade. not displayed or Flashing b.
Page 108: No Lights
International W ine Storage Series International W ine Storage Series TroubleShoot Guide (ICB400) (ICB400) PROBLEM POSSIBLE CAUSE TEST / ACTION X. No Lights No power to unit Check / correct power supply to unit. Unit switched OFF Switch unit ON, press POWER key. Unit in Sabbath Mode Exit Sabbath Mode, press POWER key.
Page 109 International W ine Storage Series International W ine Storage Series TroubleShoot Guide (ICB400) (ICB400) SEALED SYSTEM DIAGNOSTIC INFORMATION Temperature Pressure NOTES: -34°C (-30°F) -.69 Bar (10” Vac) • The temperature/pressure table at right and the normal -32°C (-25°F) -.48 Bar (7” Vac) operating pressures listed below are for reference only.
Page 110: Wine Storage Membrane Switch Ribbon Cable Test
International W ine Storage Series International W ine Storage Series TroubleShoot Guide (ICB400) (ICB400) 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.
Page 111: Model Icb427R Refrigerator Membrane Switch Ribbon Cable Test
International W ine Storage Series International W ine Storage Series TroubleShoot Guide (ICB400) (ICB400) MODEL ICB427R REFRIGERATOR MEMBRANE SWITCH / RIBBON CABLE TEST PROCEDURE If the integrity of the refrigerator control panel assembly is suspect, continuity tests should be performed at the mem- brane switch ribbon cable terminal housing.
Page 112 International W ine Storage Series International W ine Storage Series Technical Data (ICB400) (ICB400) Model ICB424 WINE STORAGE CHARGE (R-134a Refrigerant) 0.10 Kg NOTE: Always check serial tag for exact charge NORMAL OPERATING PRESSURES (At 21°C / 70°F) Low Side 10 psi to 36 psi High Side 90 psi to 100 psi...
Page 113 International W ine Storage Series International W ine Storage Series Technical Data (ICB400) (ICB400) Model ICB427 WINE STORAGE CHARGE (R-134a Refrigerant) 0.14 Kg NOTE: Always check serial tag for exact charge NORMAL OPERATING PRESSURES (At 21°C / 70°F) Low Side 10 psi to 36 psi High Side 90 psi to 100 psi...
Page 114 International W ine Storage Series International W ine Storage Series Technical Data (ICB400) (ICB400) Model ICB427R WINE STORAGE REFRIGERATOR CHARGE (R-134a Refrigerant) 0.13 Kg 0.11 Kg NOTE: Always check serial tag for exact charge NORMAL OPERATING PRESSURES (At 21°C / 70°F) 10 psi to 36 psi 10 psi to 40 psi Low Side...
Page 115 LOKRING Fittings Specifications LOKRING Fittings for Model 427 service.subzero.com LOKRING FITTINGS FOR MODEL 427 LOKRING: MODEL 427 Component Sizes Qty. LOKRING Part # Upper evaporator (without heat " → " 8 NK MS 00 exchanger replacement) " → 0.081" 8/2 NR MS 00 Lower evaporator (with heat exchanger replacement) "...
Page 116 International W ine Storage Series International W ine Storage Series Wiring Diagrams/Schematics (ICB400) (ICB400) WIRING DIAGRAM MODELS: ICB424 / ICB424FS -This wiring information is provided for use by qualified service personnel only. -Disconnect appliance from electrical supply before beginning service. -Be sure all grounding devices are connected when service is complete.
Page 117 International W ine Storage Series International W ine Storage Series Wiring Diagrams/Schematics (ICB400) (ICB400) WIRING SCHEMATIC MODELS: ICB424 / ICB424FS -This wiring information is provided for use by qualified service personnel only. -Disconnect appliance from electrical supply before beginning service. -Be sure all grounding devices are connected when service is complete.
Page 118 International W ine Storage Series International W ine Storage Series Wiring Diagrams/Schematics (ICB400) (ICB400) WIRING DIAGRAM MODELS: ICB427 -This wiring information is provided for use by qualified service personnel only. -Disconnect appliance from electrical supply before beginning service. -Be sure all grounding devices are connected when service is complete.
Page 119 International W ine Storage Series International W ine Storage Series Wiring Diagrams/Schematics (ICB400) (ICB400) WIRING SCHEMATIC MODELS: ICB427 -This wiring information is provided for use by qualified service personnel only. -Disconnect appliance from electrical supply before beginning service. -Be sure all grounding devices are connected when service is complete.
Page 120 International W ine Storage Series International W ine Storage Series Wiring Diagrams/Schematics (ICB400) (ICB400) WIRING DIAGRAM MODEL: ICB427R -This wiring information is provided for use by qualified service personnel only. -Disconnect appliance from electrical supply before beginning service. WINE CABINET -Be sure all grounding devices are connected when service is complete.
Page 121 International W ine Storage Series International W ine Storage Series Wiring Diagrams/Schematics (ICB400) (ICB400) WIRING SCHEMATIC MODEL: ICB427R -This wiring information is provided for use by qualified service personnel only. -Disconnect appliance from electrical supply before beginning service. WINE CABINET -Be sure all grounding devices are connected when service is complete.
Page 122 International W ine Storage Series International W ine Storage Series Wiring Diagrams/Schematics (ICB400) (ICB400) WIRING DIAGRAM MODEL: ICB427R -This wiring information is provided for use by qualified service personnel only. -Disconnect appliance from electrical supply before beginning service. DRAWER -Be sure all grounding devices are connected when service is complete.
Page 123 International W ine Storage Series International W ine Storage Series Wiring Diagrams/Schematics (ICB400) (ICB400) WIRING SCHEMATIC MODEL: ICB427R -This wiring information is provided for use by qualified service personnel only. -Disconnect appliance from electrical supply before beginning service. DRAWER -Be sure all grounding devices are connected when service is complete.

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Wolf Sub-Zero ICB400 Series Service Manual

International W Ine Storage Seriesinternational Wine Storageseries Component Access / Removal(Icb400)(Icb400) Component Access and Removal

International W Ine Storage Seriesinternational Wine Storageseries Troubleshoot Guide(Icb400)(Icb400)

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Summary of Contents for Wolf Sub-Zero ICB400 Series

Page 65: Table Of Contents

Page 66: Model Icb424

Page 73: Unit Tray Mechanical Components

Page 77: Models Icb427, Icb427R

Page 89: Unit Tray Mechanical Components

Page 90: Sealed System Components

Page 102: Service" Flashing

Page 103: Warm Temperature In Only One Wine Storage Compartment

Page 104: Actual Vs. Displayed Temperature Over 10° Different

Page 105: Control Panel Keys Malfunctioning

Page 106: Ee" Displayed In Place Of Refrigerator Temperature With "Service" Flashing

Page 107: Warm Refrigerator Temperatures, "Service" Not Displayed Or Flashing

Page 108: No Lights

Page 110: Wine Storage Membrane Switch Ribbon Cable Test

Page 111: Model Icb427R Refrigerator Membrane Switch Ribbon Cable Test

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Wolf Sub-Zero ICB400 Series Service Manual

International W Ine Storage Seriesinternational Wine Storageseries Component Access / Removal(Icb400)(Icb400) Component Access and Removal

International W Ine Storage Seriesinternational Wine Storageseries Troubleshoot Guide(Icb400)(Icb400)

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Summary of Contents for Wolf Sub-Zero ICB400 Series

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