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WHIRLPOOL CONSUMER SERVICES
Models WBM35LW WBM35LS WBM39LW WBM39LS WBM46LW WBM46LS
March 2003
WHIRLPOOL AUSTRALASIA CONSUMER SERVICES
SERVICE MANUAL
ELECTRONIC TOP MOUNT REFRIGERATOR Model WMB35LW WBM35LS WMB39LW WBM39LS WMB46LW WBM46LS Version 8534 772 53000 8534 772 53010 8534 773 53000 8534 773 53010 8534 774 53000 8534 774 53010
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 Please remove and destroy the superseded manual.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 Part No. SM1101
WHIRLPOOL CONSUMER SERVICES
Models WBM35LW WBM35LS WBM39LW WBM39LS WBM46LW WBM46LS
Page 1 of 34 Page 2 3 3 3 4 5 6 6 6 7 7 8 8 10 12 16 17 17 17 18 18 18 18 19 19 20 20 20 20 21 21 21 21 22 22 22 22 23 23 26 26 27 28 31 32 33
CONTENTS
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. Fan Motor Operation 3.2.4. Door Opening Management 3.2.5. Freezer Freezing Level Selection 3.2.6. Defrost System 3.2.6.1. Defrost Problems 3.2.7. Alarm System 3.2.7.1. 2Hz Alarm 3.2.7.2. 4Hz Alarm 4. TESTS 4.1. 4.2. Test Routine on Electronic Board Self Test General Notes
5. OTHER COMPONENTS 17 5.1. Cooling Fluid (Refrigerant) 5.2. Cabinet 5.3. Compressor 5.4. Evaporator and Suction Line 5.5. Filter/Dryer 5.6. Kickplate 5.7. Doors and Gaskets 5.8. Clicking Stop Bushing 5.9. Rollers and Levelling Feet 5.10. Vegetable Crisper Humidity Control 5.11. Neutraliser 5.12. Clean Back 5.13. Can Rack 5.14. Capacitor 6. COMPONENT ASSEMBLY, DISASSEMBLY AND REPLACEMENT 6.1. Disassembling the Evaporator Front and Rear Covers 6.2. Replacing the Bimetallic and Thermofuse 6.3. Replacing the Defrost Heater 6.4. Replacing the Air Diffuser and Damper 6.5. Assembling and Disassembling the Refrigerator Internal Components 6.6. Replacing the Fan Motor 6.7. Replacing the Temperature Sensor 6.8. Replacing a Cable Connection for the Potency Module 6.9. Replacing Evaporator 6.10. Replacing or Removing the Cleanback 7. REVERSING DOOR SWING (OPTIONAL) 8. REQUIRED TOOLS 9. WIRING DIAGRAM 10. FAILURE CORRECTION CHART
1 IDENTIFICATION :
1.1 Multibras Version W R M 34 A B Z WL EX = MARKET: D = VOLTAGE: B = COLOR A = VERSION: 34 = CAPACITY: WL = AUSTRALIA Z= 220-240/50Hz, D=220/50Hz B= WHITE, P= SILVER, R= INOX A= FIRST, X= INOX VERSION 34=340 LITERS, 38=380 LITERS, 44=440 LITERS NO FROST
M = TYPE:
R = PRODUCT: W = BRAND: 1.2 Multibras Serial Number X X X XXXXXX
4th to 9th Digit: Serial Number 3rd Digit: Manufacturing Year 2nd Digit: Manufacturing Month 1st Digit: Factory (Sequential)
REFRIGERATOR WHIRLPOOL
The first digit indicates the Factory Plant (in Brasil), identified by a letter as follows: C Rio Claro Plant S São Bernado Plant I Imported Products P São Paulo Plant J Joinville Plant M Manaus Plant
The second digit indicates the manufacturing month of the product: A January B February C March D April E May F June G July H August I September J October L November M December
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The third digit indicates the manufacturing year of the product: 8 1998 9 1999 0 2000 1 2001 2 2002 3 2003 4 2004 5 2005 6 2006 7 2007 8 2008 9 2009
The following six digits indicate the product manufacturing sequential: Example: 000001, 000002, ..
2 TECHNICAL SPECIFICATIONS :
Characteristics MODEL VOLTS (V) FREQUENCY (Hz) CURRENT ( A ) POWER ( W ) HEATER POWER ( W ) CIRCUIT BREAKER ( A ) POWER CONSUMPTION (Kwh/ year) REFRIGERANT LOAD COMPRESSOR MODEL (R-134A / TECUMSEH) COMPRESSOR POWER (W) or (HP) WRM34, WBM35 220/240 50 0,7 145 190 10 571 90 TPH1380YXC TP152JR 196 or 1/4 WRM38, WBM39 220/240 50 0,7 145 225 10 581 95 TPH1380YXC TP152JR 196 or 1/4 WRM44, WBM46 220/240 50 0,7 145 225 10 616 100 TPH1380YXC TP152JR 196 or 1/4
3 FUNCTIONAL CHARACTERISTICS:
3.1 Lamp activation system : The WBM39 and WBM46 models are fitted with 15-watt Lamps, one in the Refrigerator Compartment and the other in the Freezing Compartment (except for WRM34, WBM35 models). They are activated by means of two magnets internally, located on the upper portion of the refrigerator door and on the lower portion of the Freezer door (except for WRM34, WBM35 models), which connect a reed switch existing on the Interface Board (see drawing below).
Interface Board Magnets
Reed Switch
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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). The WRM34, WBM35 models are fitted with only one lamp on the Refrigerator Compartment, but their activation system is the same of the others models . 3.2 Product Electronic Control System : The Refrigerator is fully operated by an Electronic Control System which performs several functions. This electronic control system consists of the following components: · · · Potency Module Temperature Sensor Interface Board
The following described are the characteristics of each control system component: · Potency Module :
Fixed in the Cabinet, located beside the Compressor and behind to the metallic cover. The connection from the Potency Module to the Electric Line and Power Cable is made via connectors with fault-intolerant fittings.
Potency Module
The replacement of the connectors connecting to the Module is possible through an adapting process, avoiding the need for changing the Cabinet or Refrigerator. See how to proceed by referring to Item 6.8 Adapter for connecting to Potency Module. · Temperature Sensor :
Responsible for monitoring the air temperature on the Evaporator input, sending signals to the Potency Module. It is connected to the Potency Module for Cabinet internal wiring.
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·
Interface Board
Interface Board
Flat Cable
Console Display
Responsible for sending signals to the 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, open door signaling and open door audible signal. For disassembly or replaced it, remove the Console Display by forcing it upward with a medium size screwdriver . Then pull it forward. Disconnect the Interface Board from the Flat Cable (multiway cable) and replace it.
REMARKS · Whenever the Refrigerator is powered on, the red Led with the ON inscription should remain lit.
3.2.1 Freezer Temperature Control : The temperature inside the product is dependent on the quantity of stored food and on the door opening frequency. The Temperature Sensor is located behind the Evaporator and is responsible for monitoring the Freezer inner temperature. When the temperature on the Sensor is higher than the selected temperature range (see table below), the Potency Module will turn the Compressor on. When the Sensor detects a temperature value lower than that of the selected range, the Potency Module will turn the Compressor off. The temperatures in the compartments are described as follows:
Freezer Compartment
MODEL WRM34, WBM35 WRM38, WBM39 WRM44, WBM46 ADJUST POSITION MINIMUM MEDIUM MAXIMUM SWITCH ON - 9°C - 13°C - 20°C SWITCH OFF - 18°C - 21°C - 27°C
REMARKS · The Refrigerator control system is fitted with a time counter which allows the compressor to be turned on only after elapsing SEVEN minutes from the power down. This prevents the Compressor from attempting to start while the system pressures are not equalized yet.
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·
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. The Damper works independently from the Compressor, that is, it only opens or closes the passage of cold air from the Freezer to the Refrigerator, increasing or reducing the air flow, thereby controlling the temperature in this compartment as per the selected graduation. The temperatures in the compartments are described as follows:
Refrigerator Compartment
MODEL POINT Cold Room WRM34, WBM35 WRM38, WBM39 WRM44, WBM46 Shelves (Center) Vegetable Drawer ADJUST MINIMUM 2 to 4°C 7 to 9°C 13 to 15°C POSITION MEDIUM -1 to 1°C 4 to 6°C 10 to 12°C MAXIMUM -4 to 6°C -1 to 1°C 7 to 9°C
3.2.3 Fan Motor Operation: The Fan Motor is attached to the Evaporator Rear Cover by a bolt and is responsible for circulating the forced air inside the Refrigerator. The Fan Motor: · · Works independently from the Compressor and is managed by the electronic control Turns off whenever any of the doors is opened.
3.2.4 Door Opening Management : Whenever one of the doors is open, the following takes place: · · · · The corresponding Lamp turns on. The Fan Motor turns off. The red Led with the DOOR OPEN inscription becomes on. After the door is Open for more than 1 minute and a half, the red LED will start flashing and an alarm will sound at a frequency of 2 Hz (20 bips at every 10 seconds), warning the consumer. The audible alarm will be turned off by pressing the ALARM OFF button, but the LED will remain on. After more than 1 minute and a half have elapsed, the alarm will sound again and the LED will flash again. This situation will be repeated at every 1 minute and half until the Door is closed, when all those functions will then be turned off.
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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. The audible alarm, however, can be turned off by pressing the ALARM button.
3.2.5 Freezer Freezing Level Selection : For all models, every time the face FREEZING LEVEL button is pressed, the levels MINIMUM, MEDIUM or MAXIMUM is selected according to the table in item 3.2.1 and the corresponding green Led turns on. If the consumer does not inform the desired temperature level, the Refrigerator will automatically start on the Medium level. If the consumer still pressing the Freezing Level button, the FAST FREEZING function will be activated (at this moment the three green Led's are simultaneously lit ), which temporarily eliminates the Temperature Sensor performance, the Compressor will remain on for up to 18 hours. When the function is enabled, the electronic control system stops controlling the Compressor and Fan Motor operation. To disable it, the FREEZING LEVEL button must be pressed again. The product will then operate again on the last temperature range it was previously selected. In case the function is not disabled, the electronic control will do it after 18 HOURS. NOTES · Should the Door be open when the Fast Freezing function is on, the system performs its function normally, the fan however should only be turned on after 6 minutes or when the Door is closed. · Should the Refrigerator be performing the Defrost operation when the Fast Freezing function is enabled, the electronic system will complete this and only then the Fast Freezing will start. The Interface Board, however, remains with the 3 green Leds lit, indicating to the User that the Fast Freezing function has been enabled. · Should the Fast Freezing function last for the maximum time (18 hours), the Refrigerator will perform 2 Defrost operations. 3.2.6 Defrost System: See the items making up the Defrost System on the below drawing:
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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. The defrost occurs after the Compressor is running for 7 Hours, when it and the Fan Motor are then turned off and the Heater is turned on. The average Defrost time is 20 to 40 minutes (maximum time). After the Bimetalic turns the Heater off, it takes 3 minutes for the Compressor to start operating, this time being enough for all defrosting water to flow out to the Evaporation Container. Once the Compressor is on, the Fan still awaits another 3 minutes to be in service. 3.2.6.1 Problems liable to happen during the defrost: As previously seen the maximum defrost time can not exceed 40 minutes; if this occurs, the electronic system itself cuts off the Heater current and the defrost is finished. The system however regards this as a FAULT. In case this FAULT occurs on 3 consecutive defrosts, the Refrigerator starts to operate normally again, however all Leds - except for the ON Led - will flash and an alarm will sound at a frequency of 4 Hz (40 bips at every 10 seconds), warning the consumer. The consumer can disable the alarm by clicking on the ALARM OFF button and should call the Authorized Service. However, the 3 green Leds will continue to flash. In the event the fault is not yet cleared after 2 Hours, the audible alarm will act again and the customer should disable it again. This means there is a problem on the defrost components (Heater and/or Bimetal), or on the electronic control system itself. Likewise, if the defrost time on three consecutive defrosting lasts less than 8 minutes, the electronic system will also interpret this as a FAULT and will warn the consumer as described above. 3.2.7 Alarm System: These refrigerators have an interface system to the consumer through visual and sound Alarm.
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Should the product present any irregularity, it will set off a sound and visual alarm (2 or 4 Hz: see items 3.2.7.1 and 3.2.7.2, 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. The codes are: Code 1 On / On / On
On Door Open Alarm Off Min. Medium Máx.
Freezing Level
Fault: Freezer Door open for more than 6 minutes Solution: Advise the client to close the door; if it continues, follow the instructions in item 3.2.7.1 2Hz Alarm Code 2 Off / On / On
On Door Open Alarm Off Min. Medium Máx.
Freezing Level
Fault: Refrigerator Door open for more than 6 minutes Solution: Advise the client to close the door; if it continues, follow the instructions in item 3.2.7.1 2Hz Alarm Code 3 Off / Off / On
On Door Open Alarm Off Min. Medium Máx.
Freezing Level
Fault: Freezer Temperature over 0o C Solution: Technician must visit client and proceed according to the instructions in item 3.2.7.1 2Hz Alarm Code 4 On / Off / On
On Door Open Alarm Off Min. Medium Máx.
Freezing Level
Fault: Temperature sensor circuit open Solution: Technician must visit client and proceed according to the instructions in item 3.2.7.1 2Hz Alarm Code 5 On / Off / Off
On Door Open Alarm Off
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Máx.
Freezing Level
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Fault: Bimetal does not open for 3 consecutive defrost cycles Solution: Technician must visit client and proceed according to the instructions in item 3.2.7.2 4Hz Alarm Code 6 On / On / Off
On Door Open Alarm Off Min. Medium Máx.
Freezing Level
Fault: Bimetal opens when not defrosting Solution: Technician must visit client and proceed according to the instructions in item 3.2.7.2 4Hz Alarm
Code 7 Off / On / Off
On Door Open Alarm Off Min. Medium Máx.
Freezing Level
Fault: Bimetal opens too quickly for 3 consecutive defrost cycles Solution: Technician must visit client and proceed according to the instructions in item 3.2.7.2 4Hz Alarm When one of these faults occur, the client must be instructed to turn off the sound alarm by pressing the Alarm Off key, however, THE PRODUCT MUST NOT BE UNPLUGGED FROM THE WALL SOCKET. As previously mentioned, these faults are related to the 2 or 4Hz Alarms, and are explained in greater detail as follows: 3.2.7.1 - 2Hz Alarm This type of alarm is identified through interface Board LEDs that blink 20 times each 10 seconds, together with sound Beeps, being associated with: · Door Opened for more than one and half minute: (See Item 3.2.4 Door Management) · Lack of Magnet inside the Door: these models have an injected Magnet (foamed) together with the Doors (next to the Upper and Lower Heads) as shown in item 3.1, Lights Actuation System; so, if the magnet is missing, the product would assume that the door is open and it would actuate the 2 Hz alarm system; therefore, aided by another magnet, check if the magnet exists by passing it over the plastic Heads. If magnetic attraction exists, discard this possibility. · Temperature Sensor Failure, which is reading temperatures above zero at the Freezer, while the product is normally working (cooling) at a temperature below zero. This type of failure is most likely to happen during night/dawn hours when the Doors opening is less frequent. Sensor Analysis Procedure
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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. · · · · · · · Ensure that the product is cooling normally; Ice BLOCKING should NOT exist in the Return/Blowing Ducts; The drain must not be clogged; Be sure that the alarm IS NOT 4 Hz, (lights blink 40 times either 10 seconds), for the 4 Hz alarm indicates a defrost system and NOT a Sensor failure; Ensure that NO yielding problem exists associated with the Hermetic System (Leakage, shortage of refrigerant, clogging, etc.); Ensure that the Return and Blowing Ducts are NOT jammed by objects; Check for any failures in the Door Management System
Note: The Door Management System will ALWAYS BE NULLIFIED while the product is under Alarm, that is, this checking procedure should only be performed after reading the Sensor Voltage.
IMPORTANT Under this Alarm status in which the product Cools Normally, THE POTENCY MODULE SHALL NOT BE REPLACED, for it will NOT solve the problem.
FIELD PROVISIONS Upon receiving this type of call, direct the Customer to "DO NOT DISCONNECT THE PRODUCT FROM THE SOCKET". Under situations when the product is sounding the Alarm, just direct the Customer to press the "Alarm Off" key. By doing so, the sound Alarm (Horn) will turn off and the visual Alarm made by the LEDs (green/red lights on the Freezer Control Panel) will remain blinking, thus facilitating the identification of the problem. Thereafter proceed to:
1- Without disconnecting the product from the Wall Socket, release the Potency Module (take out the Metallic Cover and Module Plastic Cover) such as to gain access to the product Electric Wiring to which the Module is connected.
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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. 3- Being the "Product Cool" (temperature below zero), the reading value shall be higher than 1.5 Vdc. If the reading is LOWER than this value, then the Temperature Sensor replacement will be required. In this case (in which the Temperature Sensor replacement is required), proceed in accordance to the instructions given in item 6.7- Temperature Sensor Replacement.
IMPORTANT Remember that the Refrigerators Alarm has a function, and this function must be accomplished whenever a product failure occurs. Therefore, DO NOT CHANGE SENSORS UNNECESSARY.
3.2.7.2 - 4Hz Alarm
This type of alarm is identified through interface Board LEDs that blink 40 times either 10 seconds, together with sound Beeps, being associated with a Refrigerator Defrost System failure (see items 3.2.6.1- Problems that might occur during defrost), that might be: · 3 consecutive Defrosts with time over 40 minutes
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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. REMINDER: 4 Hz Alarm means defrost system failure. 2 Hz Alarm means temperature or door management system failure. Procedure for failure Analysis on Bimetal or Defrost Heater Whenever an ice blocking is detected in these Refrigerators, it is very important to perform the correct diagnosis on both the Defrost Heater and Bimetal for ensuring the perfect functioning by the time of performing the defrost procedure. A- Defrost Heater Test a.1) Perform the product self-test as indicated in Item 4.1 Test Routine
a.2) During the self-test ensure that the Current indicated in the Ammeter Pliers display is in accordance to the specifications below.
Current of Defrost Heater
MODEL WRM38, WBM39, WRM44, WBM46 WRM34, WBM35 220-240V / 50Hz 0,69A to 1,13A 0,62A to 0,98A
a.3) If the current value found is different from the above mentioned, also check for the Resistance Ohm value. In resistance scale R x1)
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Ohmic Value of Defrost Heater
MODEL WRM38, WBM39, WRM44, WBM46 WRM34, WBM35 Power ( W ) 225 W +/-20W 190 W +/- 20W 220-240V / 50Hz) 236,7 ôhms to 276,2 ôhms 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). Perform the self-test again and check the values shown on the Ammeter Pliers display.
B- Defrost Bimetal Test With the contact bimetal closed (product cool, preferably below zero), do it the continuity test between their points, before start the Gauge Test, it's one the way to check the eventual failure in the Termofuse/ Bimetal b.1) With the product cool (preferably below zero), secure the thermocouple of a Temperature Sensor to the body of the defrost Bimetal that was secured to the evaporator.
b.2) Replace the freezer rear Ammeter Pliers at one of the
and front covers, and then place the power-input wires.
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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). b.4) Upon turning on the product again, the refrigerator will perform an automatic defrost after functioning for 40 minutes.
As soon as the defrost starts, the Compressor and the Fan that are turned on will be turned off by the Module and the Ammeter current comes near to zero;
Compressor and Fan turned off
b.5) In the following moment the Defrost Heater is actuated;
Check the current value found against that indicated in Item a.2 table, according to product model/ voltage
b.6) Monitor the refrigerator defrosting by the Ammeter Pliers for after a few minutes, the Bimetal opens its contact and the current shown in the Ammeter Pliers display drops to near zero (the Heater was turned off). Heater turned off
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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). INDICATION ON THE BIMETAL BODY L15 21C OPENING TEMPERATURE 12°C to 18°C CLOSING TEMPERATURE -2°C to -10°C
In case the temperature indicated on the Thermometer at the moment of opening is different than the range indicated in the table above, change the defrost Bimetal.
4 TESTS :
4.1 Test Routine on the Electronic Board (Potency Module) and Components: Whenever the Refrigerator is powered on it automatically performs a Test Routine which takes approximately 8 minutes. Such routine will test automatically all loads (components), turning them on and off on a determined sequence. It is advisable during these 8 minutes that the customer does not attempt to select the product functions, as it will respond by activating Leds and Alarm, what may confuse the consumer as this may lead him or her to tink the product is defective. Due to this the consumer should be advised to wait for 10 minutes, when he or she plugs in the Refrigerator, in order to select any of its functions. In addition to the above described routine the Refrigerator Electronic Control system relies on another component test routine intended for the technician (Self-Test), which allows the field detection of faulty components on the product. The Self-Test is performed as follows:
TEST ROUTINE
1. Place an Ammeter Type Clamp on one of the power cable wire;
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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.
6.
Open both doors (Refrigerator and Freezer) at the same time. At this moment the fan's motor should switch on automatically and the lights should be off. NOTE: Leave the fan switched on for 4 minutes, so that the system's pressure equalizes and the Compressor may be tested in the next step. (Monitor the fan's current value through the an Ammeter)
7. 8.
Press the "Freezer" key, and the fan's motor will switch off; Press the "Freezer" key again, and the compressor will switch on; NOTE: Let the compressor run for 5 minutes. This time is necessary for the bimetallic strip to close its contact, and in the next step we can test its resistance. (The value of the current indicated on the an Ammeter should be close to the nominal value).
9. 10.
Press the "Freezer" key and the compressor will switch off; Press the "Freezer" key again, and the defrost heater will switch on; NOTE: Check on the Clamp Ammeter if the heater was switched on and compare the current value on the an Ammeter with the value of Defrost Heater Current Table. If the value is different unplug the product from the power supply and check the element's ohmic value according to the Defrost Heater Ohmic Table value.
11. 12.
Press the "Freezer" key, and the heater will switch off; Press the "Freezer" key once again and the lights (refrigerator and freezer compartments) will switch on; NOTE: The WRM34, WBM35 models, no has light in the Freezer Compartment, however just the refrigerator light will turn on.
13. 14.
Press the "Freezer" key, and the lights will switch off; Press the "Freezer's" key one more time, the product will cancel its test routine and return to normal operation;
4.2 Self-Test General Notes: · · · The maximum time allowed between each of the operations (after the fan check) is 6 minutes. After this time the Self-Test will be automatically cancelled and the factory test routine lasting approximately 8 minutes will begin. Using Ammeter Pliers monitor the component Electric Current. The Ammeter Pliers should be placed on the power cable by the WHITE WIRE behind the Potency Module, as this is the common wire for the whole product Electric Line. After the 5 item, you will notice that the Freezer temperature selection Leds will go off (only the power indication red Led will remain on), thus indicating that the Self-Test was accepted;
5 OTHER COMPONENTS :
5.1 Cooling Fluid:
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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 Cabinet : The Cabinets are fitted with a flange and side heating tube so as to avoid sweating in places where the relative humidity is very high. In addition, a 10-Watt Resistance is located in the Return Duct in such a way to avoid any possible freezing on that area. This resistance is factory turned ON. 5.3 Compressor : These models are fitted with Tecumseh Compressors TPH1380YXC / TP152JR (240V/ 50Hz) which are prepared to work only with the R134A Fluid and can only be replaced with another of the same type. 5.4 Evaporator and Suction Line: At present, all models are being produced with their Suction Line positioned inside the polyurethane insulation (foamed to the Cabinet) and connected to the Evaporator by 2 Lokring Connections (8mm) and no longer by weld. In case of repair/ re-operation/ replacement of such components, proceed as indicated in Item 6.9 - Replacing Evaporator or Suction Line 5.5 Cooling Fluid Drying Filter : By operating with the R134A Cooling Fluid the Refrigerant Filter requires a greater quantity of drying element than the Filters used on products using the R12. Therefore, always use the original Drying Filter. When repair the Sealed System, always change the Drier Filter, using a new equivalent for R134 A. 5.6 Kick Plate: On its lower portion the Refrigerator has a Kick Plate which is attached to the Cabinet by means of two plastic clips. To remove it, press it down on the area where the clips are located and pull it forward. To fit it again, just position it against the Cabinet. On fitting it again do not forget to bend down the cutting existing at the end which remains in contact with the Lower Hinge.
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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. Such procedure ensures the Magnet will not break.
5.8 Clicking Stop Bushing:
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Freezer 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. The Refrigerator Door does not use the Clicking Bushing, but only the Stop Bushing.
Refrigerator Door
Stop Bushing
Clicking Stop Bushing
5.9 Rollers and Leveling Feet: The Refrigerator is equipped with four rollers which allow it to be easily moved around, making the kitchen cleaning easier, and with two Leveling Feet in its front portion to lock it on the desired position. To lock the Refrigerator on the desired position, rotate the Leveling Feet until they reach the ground, raising the casters. 5.10 - Vegetable Tray Humidity Control: Certain food types such as greens and fruits get dehydrated when stored in a cold and dry environment. The Vegetable Tray keeps an appropriate temperature and humidity for storing these food items, preserving their natural characteristics. For this reason the Vegetable Tray is equipped with a Humidity Controller, which is a sliding plastic part allowing to control the air flow to the Tray inside as necessary.
Humidity Control
Vegetable Tray
It is recommended to keep the Controller closed in order to preserve the leafy vegetables and open to preserve fruits. 5.11 Deodorizer (Neutroliser) : The Refrigerator is fitted with a "special" activated charcoal filter called Deodorizer. This acts by absorbing characteristic odors of certain food which circulate inside the product. It thereby prevents these foods from losing their natural flavor and smell characteristics. The Deodorizer does not need to be replaced as its validity time is undetermined. It is located at the Air Return inlet.
Air Return
Deodorizer
5.12 Clean Back:
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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 Replacing or Removing the Clean Back. 5.13 Can Rack Located in the Refrigerator Door, the Can Rack, is a support to store cans easily, it was developmented for stores up six cans simultaneously. Note: The Can Rack, is not available for the WRM34, WBM35 models.
5.14 Capacitor This is a march capacitor with a capacity of 5 µF , its function is help the compressor works efficient and not to execute startup
Capacitor
To replace it remove the metallic Cover of the power module to access its fastening nut.
6 COMPONENT ASSEMBLING, DISASSEMBLING AND REPLACEMENT:
In order for some functional components to be replaced it is necessary to disassemble the Evaporator covers. Then, see the procedures to disassemble them and to replace components: 6.1 Disassembling the Evaporator Front and Rear Covers:
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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. With a ¼" gun wrench, remove the screws attaching the Evaporator Rear Cover to the evaporator Internal Box and remove it. (Be careful when removing the screws, particularly the one located in the lower portion at your right side, as the Blowing Duct is located there. If a screw is dropped in that area this may cause future problems such as the Damper locking. Cover the duct entry with a clean cloth or a paper or use a Magnetized Wrench); 5. Now you already have access to all of the Evaporator functional items. 6.2 Replacing the Bimetalic with Termofuse (Bimetal): 1. 2. 3. 4. Disconnect its electric terminals (using the Electric Diagram); Unfasten the Binding Strap; Loosen the bulb Holder and remove it; To place the new Bimetal, just attach it properly and connect its terminals.
6.3 Replacing the Defrost Heater : 1. Move the Defrost Chute front portion forward; 2. Unfold the aluminum fins on the Evaporator sides which are holding the Heater; 3. Disconnect its electric terminals; 4. Move it away carefully and replace it. 6.4 Assembling and Disassembling the Refrigerator Internal Components: 1. Remove the glass Shelves; 2. Remove the Cold Room Shelf from the Extra Cold Compartment; 6.5 Replacing the Air Diffuser and Damper : 1. Remove the Damper Button; 2. Remove the Refrigerator Lamp; 3. Loosen the two screws attaching the Air Diffuser Cover (one of them is located behind the Lamp protector), use a ¼" Gun Wrench; 4. Remove the Air Diffuser Cover; 5. Separate the Air Diffuser from the Diffuser Supplement; 6. Remove the Damper + Damper Housing assembly; 7. Using a ¼" Gun Wrench, remove the screws attaching the Damper and replace it; 8. See the refrigerator compartment components in below
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Air Diffuser Suplement
Damper Housing 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.
6.7 Replacing the Temperature Sensor: In the need of replacing the TEMPERATURE SENSOR, use the SENSOR KIT (code 326.005.854), consisting of 1 TEMPERATURE SENSOR, 2 CONNECTORS, 1 screw and 1 tying strap.
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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 connector.
4) Then insert one of the sensor wires into the same connector.
5) Using a pliers press, the connector blade, locking both wires. The Connector has an internal metal blade that joints both wires at the moment of locking.
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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.
7) Secure the cable and then fix the strap with a screw in the position of the fixing clamp.
tying strap to the SENSOR
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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
Adapter Conector
PART No. 326.013.118
Link Conector
Field Provisions a) Place the Adapter wire into the connector until the housing end. Note: For all operations, stripping the wires is not required. b) c) d) e) f) g) Cut the relevant cable (wire) coming from the Cabinet and place it next to the connector Using a pliers, press the connector blade until locking the wires (cables) Repeat operations a, b and c, one after the other, until completing the 10 connections (cables) Close the connectors. Do the second isolation using a Tape. Cover all the wires in the same time Perform the Self-test routine at the end.
IMPORTANT · The application of this Adapter must be done with extreme attention to avoid cables inversion that will not occur. · The connection must be done on a cable by cable (wire by wire) basis, pursuant their position in the Connector and Color, for the cables coming from the Cabinet have different colors in accordance to the Refrigerator model. 6.9 - Replacing Evaporator These products are manufactured, with Suction Line foamed to the Cabinet, if replacing the Evaporator is required, proceed: a) Order the Evaporator Assembly and 2 Lokring connections (see codes in the table below). b) Remove the damaged Evaporator c) Apply the new Evaporator, using 2 Lokring connections (8mm) to link the Suction Line,
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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 8mm Lokring Connection Evaporator Assembly Evaporator Assembly Part Number Models Application 326.008.340 326.008.310 326.008.309 All models WRM34, WBM35 WRM38, WBM39 WRM44, WBM46 R-134 Fluid Load (g) -90g 95g 100g
IMPORTANT · Do not use Chemical agents (Ex. Methyl Alcohol) for cleaning the system, because it is oxidant and damage the components of the Sealed Unit and mostly the Compressor · Perform the procedures properly for repair the Sealed Unit taking due care for not contaminating the System, that uses R-134 A fluid. Always use de Vacuum Pump. · When repair the Sealed System, always change the Drier Filter, using a new equivalent for R134 A.
6.10
- Replacing or Removing the Clean Back
For replacing or removing the Clean Back, 2 process/ method are showed, as follows: A Driller Using a hand drill, remove all fastening rivets of the clean back Note: Use 3,00 +0,2 - 0 mm drill (diameter) Attention: Inside of the foam, close to compressor deck, we have the heating tube, which have the function of avoiding cabinet sweating. Take care to not drill this tube, while you are drilling the rivets, by using a small drill on the length (10 mm maximum). B Spatula: When it is not available a hand drill, the rivets can be removed by using a Spatula. Please do as follow : a) Place Spatula between the clean back and cabinet, b) Using hammer or anything similar, hit the spatula holder to cut/ break the rivet (check movie) c) Repeat the process for all rivets.
Rivet
Attention: For both system, take care to not damage/ scratch the clean back painting.
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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. By screws: When a riveting machine is not available, self tapping screws can be used . Attention: Don't use a too large screw (on length) to avoid drilling the heating tube as mentioned earlier. Tight screws slowly to avoid damaging back flange. If so, take a bigger screw (in diameter) and repeat process.
7 REVERSE DOOR SWING (OPTIONAL):
These refrigerators are factory assembled with the door opening toward the right side (hinges and bushings located on the right side, when facing the product). For this models, the reverse door to the left side, is not required to change the Doors anymore, just needs to change Bushings (Stop and Clicking) and Centre left-hand Hinge. To revert the door opening, do as follows: 1) 2) 3) Remove the upper hinge cover Remove the Kick Plate (Inferior Panel) Using a medium screwdriver, remove the display, interface board and console panel
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4)
To remove the doors use a large srewdriver to loosen the screws attaching the upper hinge, lower hinge , intermediate hinge and intermediate hinge complement
5) 6)
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
7)
Install the left Stop Bushing on the left-hand, that was ordered
8)
Remove the right Stop Bushing and connect on the right side (bottom End Cap Refrigerator Door ) the plug that was ordered
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9)
Move the plug (upper End Cap Refrigerator Door ) from left-hand to right-hand, changing in the same time the bush Bush
10) 11) 12) 13)
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; Remove the plugs from the upper hinge left side and move them to the right side;
14)
On the demarcated area and using a large phillips wrench, open one hole (using impact) on the left side upper End Cap freezer door, for do this operation, follow the same way used in item 6
15) 16) 17) 18) 19) 20) 21)
Install the left Clicking Bushing on the left-hand, that was ordered Connect on the right side (upper End Cap Freezer Door ) the plug that was ordered Install the freezer door, with openning toward to the left-hand Install the upper hinge on the left side; Adjust the doors position Install the console panel, interface board and subsequently the display; Finally install the upper hige cover
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PARTS NEEDS TO USE/ REPLACE
Stop Bush
Clicking Bush Intermediate Hinge Plug
Note: Left-Hand items required.
Models Part Number 004.210.050 004.177.401 004.220.480 326.007.014 326.024.682 326.006.358 326.006.357 326.012.577 326.027.348 Description Clicking Bushing - Left-Hand White color (Freezer Door ) Stop Bushing - Left-Hand White color (Refrigerator Door) Intermediate Hinge - Left-Hand (White and Inox products) Plug, White color Reversing Door Kit White color (White Products) Clicking Bushing - Left-Hand Black color (Freezer Door ) Stop Bushing - Left-Hand Black color (Refrigerator Door) Plug, Black color Reversing Door Kit Black color (Inox Products)
WRM34/ WBM35 WRM38/ WBM39 WRM44/ WBM46
01 01 01 02 01 01 01 02 01
8 SMALL SIZED TOOLS (NECESSARY):
Temperature Thermometer Multi-meter Ammeter Pliers/ Clamp Pliers Cannon Wrench ¼ Small and Large Screwdriver Cannon Wrench 8mm Medium and Large Phillips Wrench Spatula Drill machine Manual riveting machine
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9 WIRING DIAGRAM:
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10 FAILURE CORRECTION CHART:
ALLEGED FAULT Does not Work CHECK If the Power Cable is connected. If the jack is powered. If the Potency Module or the Interface Board is defective. If the circuit breaker is tripped or if the home fuse is blown. SOLUTION Connect it If not, advise the consumer to call an electrician. Replace it.
Reset the circuit breaker or advise the consumer to call an electrician. Voltage too low. (This may be Advise the consumer to install noticed through the lamp lighting an automatic 1000-Watt oscillation) stabilizer. Power Cable damaged. Replace it. Does Not Refrigerate / If installation is correct (heat Advise the consumer on the Refrigerates not much in sources, sunshine, embedding, etc.) proper installation and minimum the Refrigerator. distance for embedding (10 cm on the top and rear and 3 cm on the sides). If the Damper Button is on the proper Advise the consumer. On days position. too hot or with the Refrigerator too full, the Damper Button should be set to maximum. If there are any utensils blocking the Unblock and advise the cold air outlet. consumer. If there were excess door openings Advise the consumer. or open doors. Does not Chill / Chills not If the evaporator is blocked by ice. There were problems in the much in the Freezer defrosting. Check if the Bimetal shows any problems, if it is inproperly positioned or leaned against the Defrost Heater. Check if the Defrost Heater is blown. Check if the Chute or Defrosting Drain is blocked. Freezing in the If utensils are placed directly on the Reposition them and advise the Refrigerator Compartment. cold air outlet. consumer. If the Damper Button is properly Advise the consumer: on days positioned. too cold or with few food in the Refrigerator, the Damper Button should be set to the minimum. Internal Refrigerator If the Doors are closing properly. Level the product, check the Exudation. gasket and check the Hinge adjustment. If the Damper Button is on the proper Place the Button on the proper position. position and advise the consumer. If still hot, unpacked or uncovered Advise the consumer. food was stored.
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ALLEGED FAULT External Exudation
SOLUTION 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 or remove such heat sources. sunshine on it. Gasket bad sealing. Replace it. Noise. If the product is unleveled. Level it and advise the consumer. Fan Motor noise. Advise the consumer that this is normal. Noise when Compressor is turned Advise the consumer that this is on/off. normal. Check capillary absorber assembly Noises during the defrosting. Advise the consumer that this is normal. Difficulty to open the If the Vacuum Valve is blocked. Unblock it and advise the Doors. consumer. Difficulty to close the If the product is unleveled. Level it and advise the Doors. consumer. If utensils and internal portions are Position them properly and properly positioned. advise the consumer. Food on the Vegetable If Vegetable Tray Humidity Controller Adjust the Humidity Controller to Tray sweating. closed. a more open position. Unpleasant smell or taste If the refrigerator is clean inside. Advise the consumer to clean it on the food. with warm water and neutral soap. If still hot, unpacked, or uncovered Advise the consumer. food was stored. Smell of brand-new product. Advise the consumer to clean with warm water and neutral soap. Ice being formed in the Humidity infiltration through the door. Check for any object blocking Freezer. the door closing. If gasket is defective, replace it. Some frost formation above ice trays Advise the consumer about it is normal Alarm activated/ Led's are If is 2 Hz Alarm blinking If is 4 Hz Alarm Proceed according to item 3.2.7.1 of this manual Proceed according to item 3.2.7.2 of this manual
CHECK Relative humidity is high.
INTERNATIONAL CONSUMER SERVICE MULTIBRAS S/A. ELETRODOMÉSTICOS
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