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Whirlpool WBM35LW Service Manual

Electronic top mount refrigerator
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This Service Manual supersedes Service Manual, Part No. SM1100, dated July 02.
Please remove and destroy the superseded manual.
Copyright © 2002 Whirlpool (Australia) Pty. Limited
All rights strictly reserved. Reproduction or issue to third parties in any form whatsoever is not
permitted without written authority of Whirlpool (Australia) Pty. Limited
Whirlpool is a registered trademark of Whirlpool U.S.A.
This documentation is intended only for qualified technicians who possess the required qualifications and are
aware of the regulatory requirements applicable to servicing electrical appliances.
Whirlpool (Australia) Pty Limited
A. B. N. 28 003 578 023
8534 772 53000
8534 772 53010
8534 773 53000
8534 773 53010
8534 774 53000
8534 774 53010
Models WBM35LW
March 2003
Part No. SM1101



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  Summary of Contents for Whirlpool WBM35LW

  • Page 1: Consumer Services

    Copyright © 2002 Whirlpool (Australia) Pty. Limited All rights strictly reserved. Reproduction or issue to third parties in any form whatsoever is not permitted without written authority of Whirlpool (Australia) Pty. Limited Whirlpool is a registered trademark of Whirlpool U.S.A.
  • Page 2: Table Of Contents

    WHIRLPOOL CONSUMER SERVICES Models WBM35LW WBM35LS WBM39LW WBM39LS WBM46LW WBM46LS Page 1 of 34 CONTENTS Page 1. IDENTIFICATION 2. TECHNICAL SPECIFICATIONS 3. FUNCTIONAL CHARACTERISTICS 3.1. Lamp Activation System 3.2. Product Electronic Control System 3.2.1. Freezer Temperature Control 3.2.2. Refrigerator Temperature Control 3.2.3.
  • Page 3: Identification

    38=380 LITERS, 44=440 LITERS M = TYPE: NO FROST R = PRODUCT: REFRIGERATOR W = BRAND: WHIRLPOOL 1.2 – Multibras Serial Number X X X XXXXXX 4th to 9th Digit: Serial Number (Sequential) 3rd Digit: Manufacturing Year 2nd Digit: Manufacturing Month...
  • Page 4: Technical Specifications

    The third digit indicates the manufacturing year of the product: 8 – 1998 1 – 2001 4 – 2004 7 – 2007 9 – 1999 2 – 2002 5 – 2005 8 – 2008 0 – 2000 3 – 2003 6 –...
  • Page 5: Product Electronic Control System

    When the door is closed, the magnet is on the Interface Board, which informs the Potency Module causing the corresponding Lamp to remain OFF. When the door is opened, the magnet stays away from the Interface Board and the Lamp turns ON. The technician can test the activation system by using a round magnet with approximately 20 mm in diameter and 5 mm in height (preferably).
  • Page 6: Freezer Temperature Control

    • Interface Board Responsible for sending signals to the Interface Board Potency Module in order to turn the Lamps and the Fan Motor ON and OFF, with a Freezer temperature range selection, for turning the alarm off, Fast Freezing function, powered-on product signaling, Flat Cable open door signaling and open door audible signal.
  • Page 7: Refrigerator Temperature Control

    • This temperature value is measured close to the Sensor, not at the Freezer Compartment center 3.2.2 – Refrigerator Temperature Control The temperatures in the Refrigerator compartment are controlled by a Thermostatic Damper, which controls the cold air flow with three graduations (minimum, medium and maximum). The Damper does not activates or sends any signal for the Compressor to be either enabled or disabled.
  • Page 8: Freezer Freezing Level Selection

    • Should the Door remain open for 6 minutes the electronic control system will turn the Lamps off and turn the Fan Motor on again (if compressor is on). Thence, the Refrigerator starts cycling normally, even with the Door open. The alarm is however sounding and the DOOR OPEN Led and the green Leds for temperature selection will flash intermittently until the Door is closed.
  • Page 9: Alarm System

    Defrost Bimetalic & Thermofuse Defrost Heater Chute Evaporation Container The Bimetalic (Opening at 15°C and closing at - 6°C) will turn the Defrost Heater off as soon as all ice existing on the Evaporator has melted. The Defrost Heater, in turn, defrosts the Evaporator more quickly because it is all along the evaporator length.
  • Page 10 Should the product present any irregularity, it will set off a sound and visual alarm (2 or 4 Hz: see items and, respectively) and a fault code will be stored in the memory of the Interface Board. Before visiting a client requiring service, we must request that they press the Alarm Off key for a few seconds and the failure code will appear automatically (combination of the LEDs “Freezing Level “, Minimum, Medium and Maximum turned on/off as indicated below), providing a pre-diagnosis for the technician, so that the equipment/pieces necessary to resolve the problem in one visit can be taken.
  • Page 11 Fault: Bimetal does not open for 3 consecutive defrost cycles Solution: Technician must visit client and proceed according to the instructions in item – 4Hz Alarm Code 6– On / On / Off Door Medium Min. Máx Open Alarm Off Freezing Level Fault: Bimetal opens when not defrosting Solution: Technician must visit client and proceed according to the instructions in item –...
  • Page 12 ATTENTION Changing of the sensor should only be performed when the defect shown is “Alarm Sounding/ LEDs Blinking”, and the product COOLS NORMALLY IN THE REFRIGERATOR/ FREEZER COMPARTMENTS. Do not replace the sensor prior to making the analysis on the points below. •...
  • Page 13 2- With a Multi-meter having Direct Current Voltage Scale (Vdc), perform the Sensor VOLTAGE reading in the Brown and Blue Wires (first to the left) the Connector connecting the Potency Module. Note: For performing this operation, THERE IS NO NEED TO STRIP the wires; just insert the Testing Tips directly to the connector metal contact.
  • Page 14 • 3 consecutive Defrosts with time less than 8 minutes Such events might happen due to failures occurring to the Defrost Heater and/or Bimetal, either followed or not by Defrost Blocking. Therefore, check for the proper functioning of the same as described in the following procedure.
  • Page 15 Ohmic Value of Defrost Heater MODEL Power ( W ) 220-240V / 50Hz) WRM38, WBM39, WRM44, WBM46 225 W +/-20W 236,7 ôhms to 276,2 ôhms WRM34, WBM35 190 W +/- 20W 280,3 ôhms to 327,0 ôhms If you find values different from those shown in the table above, replace the Defrost Heater (remember to check also for the new Resistance ohm value).
  • Page 16 b.3) Turn the product on and wait for the Thermometer to indicate -10ºC. This temperature corresponds to the same Bimetal temperature. Then, disconnect the product from the socket and turn it on again. (operation required for the sensor sends to the module the information that the product is cool, at a temperature below zero degree).
  • Page 17: Tests

    b.7) Write down the temperature indicated in Thermometer at the moment when the Pliers is zeroed for at this moment, the Bimetal has open its contact and turned the Heater off. b.8) The temperature indicated on the Thermometer shall be within the specified range (according to the table below).
  • Page 18: Other Components

    With the closed doors, disconect and conect the power plug from the wall electrical supply; Open and close the refrigerator door for 4 times; On the Interface Plate, press the “Freezer” (temperature selection) key for 5 times; Open and close the refrigerator door once; NOTE: The operations of items 2 to 5 must be done within 1minute for the self-test to be accepted.
  • Page 19: Cabinet

    These models uses the R134A Cooling Fluid on their System. NOTE • Technicians trained on Sealed Unit Reoperation with the R134A HFC are the only personnel authorized to maintain the Refrigerator. Bear in mind that the maintenance equipment and other parts are exclusive for this cooling fluid type. 5.2 –...
  • Page 20: Doors And Gaskets

    5.7 – Doors and Gaskets: The Refrigerator and Freezer Doors are fitted with polyurethane insulation and are foamed jointly with the Door Panel. The Gasket in turn is not foamed jointly with the Panel and Door, and is not screwed, and can be easily replaced by simply pulling it from bottom to top, and fitted again by just placing it from top to bottom as per the below figure.
  • Page 21: Clean Back

    Freezer Door Refrigerator Door On its lower portion the Freezer Door uses the Clicking Stop Bushing in order to help close the Door, locking its rim on the Hinge when the Door is being closed. This bushing type prevents the door from remaining half open in instances where the consumer has not noticed that the door did not close.
  • Page 22: Can Rack

    Located at the back of these refrigerators, the basic function of Clean Back is to esthetically improve the back of the product. Important Never block the Clean Back upper air circulation vents, as it will affect the performance of the product. Should there be a need to replace it or access the condenser, see the procedure in item 6.10 –...
  • Page 23: Replacing The Defrost Heater

    1. Remove all internal components from the Freezer compartment; 2. Loosen the Bottom Lock and pull the Freezer Bottom forward; 3. Using a medium size Screwdriver, remove the Evaporator Front Cover (It will be locked only on the Rear Cover "Plastic Rims"); 4.
  • Page 24: Replacing The Fan Motor

    Damper Air Diffuser Housing Suplement Air Diffuser Diffuser Cover Damper Knob Damper 6.6 – Replacing the Fan Motor : 1. Using a Medium Size Screwdriver, remove the screw attaching the Fan Set; 2. Disconnect the electrical terminals from the Fan Set and replace it; Note: See the Fan Set Figure.
  • Page 25 Field Provisions 1) Remove the defective Temperature Sensor. 2) Apart the cabinet wires. Striping the wires is not necessary 3) Now insert one of the cabinet wires into the 4) Then insert one of the sensor wires into the connector. same connector.
  • Page 26 IMPORTANT ONLY PRESS THE METAL BLADE AFTER ENSURING THAT THE WIRES ARE TOUCHING THE CONNECTOR BOTTOM. Wire touching the bottom NOTE: Do not remove the silicon grease from inside the connector, for this grease protects the wire terminals against moisture and rust. 6) Take the other connector and repeat the operation with the other wires.
  • Page 27: Replacing Evaporator

    NOTE: The SENSOR must be directed upwards. Do not let the SENSOR hit or rub out the fan helix. 6.8 - Replacing a Cable conection for Potency Module In the need of replacing the cable Connector Assembly that connects to the Potency Module of these No Frost Electronic Refrigerators, order the Adapter Assembly, code 326.013.118, consisting of adapter and 10 connectors (the same utilized for replacing Sensors) Cable Conector...
  • Page 28 d) Do vacum on the System, followed by the R-134 refrigerant Load original for the refrigerator (that is mentioned in the product Identification Plate together with the product model) For cases of internal or external leakage in the Suction Line, the Cabinet must be replaced. Description Part Number Models Application R-134...
  • Page 29 C – Assembling the Clean Back By rivets: Put the Clean Back, aligning the upper right hole with the cabinet's hole, and using a manual riveting machine, fasten this point first. Then repeat process for all remaining points. For this operation use pop rivets with 3.2 x 5.8 mm (diameter x length) dimension.
  • Page 30 To remove the doors use a large srewdriver to loosen the screws attaching the upper hinge, lower hinge , intermediate hinge and intermediate hinge complement Install the lower hinge on the left side; Using a large phillips wrench, open one hole (using impact) on the left side bottom End Cap refrigerator door, at the place indicated Install the left Stop Bushing on the left-hand, that was ordered Remove the right Stop Bushing and connect on the right side (bottom End Cap...
  • Page 31 Move the plug (upper End Cap Refrigerator Door ) from left-hand to right-hand, changing in the same time the bush Bush Assembly the intermediate hinge complement on the right side Install the refrigerator door, with openning toward to the left-hand; Install the left-hand intermediate hinge;...
  • Page 32 PARTS NEEDS TO USE/ REPLACE Stop Bush Clicking Bush Intermediate Hinge Plug Note: Left-Hand items required. Models WRM34/ WBM35 Part Description WRM38/ WBM39 Number WRM44/ WBM46 004.210.050 Clicking Bushing - Left-Hand – White color (Freezer Door ) 004.177.401 Stop Bushing - Left-Hand – White color (Refrigerator Door) 004.220.480 Intermediate Hinge - Left-Hand (White and Inox products) 326.007.014 Plug, White color 326.024.682 Reversing Door Kit –...
  • Page 33: Wiring Diagram

    9 – WIRING DIAGRAM: MSEX0025_rev01...
  • Page 34: Failure Correction Chart

    10 – FAILURE CORRECTION CHART: ALLEGED FAULT CHECK SOLUTION Does not Work If the Power Cable is connected. Connect it If the jack is powered. If not, advise the consumer to call an electrician. If the Potency Module or the Replace it.
  • Page 35 ALLEGED FAULT CHECK SOLUTION External Exudation Relative humidity is high. Advise the consumer that the external exudation is normal in these situations. If the minimum embedding distances Advise the consumer to observe were observed. the minimum embedding distances (3 cm on the sides). If there is heat source (stove, Advise the consumer to detach heaters) near the product or direct...

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