Samsung RB215BSSB Service Manual
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Samsung RB215BSSB Service Manual

Reversible door/auto ice-maker/fridge wire box
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REFRIGERATOR
REFRIGERATOR
RB195BSSW
RB195BSSB
RB195BSVQ
RB195BSBB
RB215BSSW
RB215BSSB
RB215BSVQ
RB215BSBB
PRODUCT FEATURE
Reversible Door
Auto Ice-Maker
Fridge Wire Box
SAM0070
Table of Contents
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Summary of Contents for Samsung RB215BSSB

  • Page 1 REFRIGERATOR RB195BSSW RB195BSSB RB195BSVQ RB195BSBB RB215BSSW RB215BSSB RB215BSVQ RB215BSBB REFRIGERATOR PRODUCT FEATURE Reversible Door Auto Ice-Maker Fridge Wire Box SAM0070...

  • Page 2: Important Safety Notice

    SAMSUNG ELECTRONICS AMERICA, INC. Technical Service Guide Copyright ⓒ2005 All rights reserved. This service guide may not be reproduced in whole or in part in any form without written permission from the SAMSUNG ELECTRONICS Company.

  • Page 3: Table Of Contents

    Contents 1. INSTALLATION ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 2. NOMENCLATURE ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 3. PRODUCT SPECIFICATIONS ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 4. ELECTRICAL PART SPECIFICATIONS & STANDARD ∙∙∙∙∙∙∙∙∙∙∙∙∙ 5. WARRANTY INFORMATION ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 6. INTERIOR VIEWS AND DIMENSIONS ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 7. REFRIGERATION CYCLE AND COOL AIR CIRCULATION ROUTE ∙∙∙∙ 8. MECHANICAL DISASSEMBLY ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙...

  • Page 4: Installation

    1. INSTALLATION 1) To protect refrigerator in movement Use padded hand truck from side only. 2) Remove all protective tape and pad from the refrigerators. Connect power cord. Adjust the clearance between the doors. 3) Temperature controls and preset in the factory for recommended settings.

  • Page 5: Product Specifications

    3. PRODUCT SPECIFICATIONS Model RB195BSSW, RB195BSSB, RB195BSVQ, RB195BSBB RB215BSSW, RB215BSSB, RB215BSBB, RB215BSVQ Type BMF 2 Door Temperature control Electronic control 18.7 20.4 Total Net Capacity Freezer 12.8 13.9 Refrigerator Net dimension 32.3 28.3 69.9 32.3 30.3 69.9 Cabinet insulation CYCLO-PENTANE...
  • Page 6 ELECTRICAL PART SPECIFICATIONS & STANDARD ITEM STANDARD Type Temperature Selection ON(℉) OFF(℉) –14℉ –12.0℉ –16.0℉ Freezer F-Sensor –2℉ 0℉ –4℉ 8℉ 10℉ 6℉ Type Temperature Selection ON(℉) OFF(℉) 34℉ 36℉ 32℉ Refrigerator R-Sensor 38℉ 40℉ 36℉ 46℉ 48℉ 44℉ First Defrost Cycle 4hr ±10min (Concurrent Defrost of F and R) Defrosting...

  • Page 7: Warranty Information

    5. WARRANTY INFORMATION...

  • Page 8: Interior Views And Dimensions

    6. Interior Views and Dimensions 6-1) Shelves and Bins • Deli drawer • Door Bin Pull it out to disassemble. Push it up and slide it out to disassemble. Light • • • • Gallon Bin • Glass Shelf • Pull it out until its stop •...
  • Page 9 Interior Views and Dimensions 6-2) Dimensions of Refrigerator (Inches) MODEL RB195 24.3 28.3 57.8 RB215 26.3 30.3 59.8...

  • Page 10: Refrigeration Cycle And Cool Air Circulation Route

    7. Refrigeration Cycle and Cool Air Circulation Route 7-1) Refrigerant Route in Refrigeration cycle Compressor → Sub condenser → Cluster pipe → Hot pipe → Dryer → Capillary tube → R-Evaporator → F-Evaporator → Accumulator → Suction pipe → Compressor...
  • Page 11 Refrigeration Cycle and Cool Air Circulation Route 7-2) Cool Air Circulation...

  • Page 12: Mechanical Disassembly

    8. Mechanical Disassembly Refrigerator Disassembly Control Panel ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ Refrigerator Light ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ Freezer Light ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ Evaporator Cover in the Refrigerator ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ Evaporator Cover in the Freezer ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ Evaporator in the Freezer ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ Evaporator in the Refrigerator ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ Machine Compartment ＆ Electric Box ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙...

  • Page 13: Control Panel

    Mechanical Disassembly Control Panel 1. Remove the screws. 2. Pull out the control panel. 3. Disconnect the wire connector.

  • Page 14: Refrigerator Light

    Mechanical Disassembly Always unplug the power cord before replacing the refrigerator lamp. There is the danger of electric shock. Warning Refrigerator Light Freezer Light 1. Remove the cover by pressing the bottom tab. 1. Remove the screw. 2. Remove the lamp cover by unlocking the tabs and pulling the cover down.

  • Page 15: Evaporator Cover In The Refrigerator

    Mechanical Disassembly Evaporator Cover in the Refrigerator 6. Disconnect the wire connector. 1. Remove all shelves and drawers from the refrigerator. 2. Pull out the screw caps with a small flat-blade screwdriver. 3. Remove 6 Phillps screws from the cover. ■Ductwork of the evaporator fan assembly.

  • Page 16: Evaporator Cover In The Freezer

    Mechanical Disassembly Evaporator Cover in Freezer 5. Disconnect wire connector from the top-left 1. Remove all drawers from the freezer. corner. 2. Remove screws (2) from the support rail. 6. Remove 2 screws from the rear cover of the freezer evaporator and unlock the tabs to remove it.

  • Page 17: Evaporator In The Freezer

    Mechanical Disassembly Evaporator in Refrigerator Evaporator in Freezer Evaporator is located in the bottom of refrigerator. Evaporator is located in the bottom of freezer to 1. Take off the ductwork in refrigerator. produce cold air driven across the evaporator coils. 2.

  • Page 18: Mechanical Disassembly

    Mechanical Disassembly Machine Compartment ＆ ＆ Electric Box 3. Mechine compartment assembly Make sure the power cord is unplugged before replacing any electric components. Warning 1. Unplug the power cord. 4. Disassemble the electric box cover after removing the screws with a Phillips screwdriver. 2.

  • Page 19: Reversible The Door Swing

    Unplug the refrigerator from its electrical outlet. Empty all door guards / racks. Warning 1. If you want to change the door direction, call 1-800-SAMSUNG. 2. Read the instructions carefully before starting. 3. Handle parts carefully to avoid scrathing paint.
  • Page 20 REVERSING THE DOOR SWING Read these instructions completely and carefully - ASSEMBLY OF FREEZER DOOR 5. Disassemble the fridge door by lifting it upward. Be careful not to drop and scratch the fridge door. 8. After removing the screw, disassemble the Cover Hinge and the Hinge as below picture.
  • Page 21 REVERSING THE DOOR SWING Read these instructions completely and carefully 11. Assemble each part by exchanging its into the 14. Assemble the each part into the reverse side as reverse side as below picture. below picture. Assemble the Door S/W as it is. (Make sure not to insert it upside down) 12.
  • Page 22 REVERSING THE DOOR SWING Read these instructions completely and carefully 17. Assemble the assembled hinge and door to the 20. Assemble each part by exchanging its into refrigerator as below picture. Don't forget to insert the reverse side as below picture. washer with grease.
  • Page 23 REVERSING THE DOOR SWING Read these instructions completely and carefully 23. After disassembling Grommet and Cap wire at 26. Assemble the Cover Hinge with the the left side, assemble them into the right side. screws as below picture. Cover Hinge Cover Hinge Cap wire Cap wire...

  • Page 24: Installation Of The Water Line

    10. INSTALLATION OF THE WATER LINE 10-1) Before You Install the water line • This water line installation is not warranted by the refrigerator or icemaker manufacturer. Follow these instructions carefully to minimize the risk of expensive water damage. • Banging pipes (water banging in the pipes) in house plumbing can cause damage to refrigerator parts and lead to water leakage or flooding.

  • Page 25: Temp Control &Operation Functions

    11. Temp Control &Operation Functions 11-1) DISPLAY DESIGN ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 11-2) Temp Control Function ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 11-3) Super Freeze Function and Super Cool Functions ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 11-4) Ice Off Function ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 11-5) Child Lock Function ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 11-6) Buzzer Alarm Function ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 11-7) Machine Compartment F-Fan Motor Delay Function ∙∙∙∙∙∙∙∙∙∙∙∙...

  • Page 26: 11-1) Display Design

    Temp Control &Operation Functions 11-1) DISPLAY DESIGN 11-2) Temp Control Function 1) Freezer Temperature Control ※ When the Freezer button is pressed,the current set temp will be displayed.And, when the button is pressed again within 5 seconds,it will carry out the following 1-2)and when there is no button press,it will go back to the previous display.

  • Page 27: 11-3) Super Freeze Function And Super Cool Functions

    Temp Control &Operation Functions 2) Fridge Temperature Control 2-1) The temperature will be selected between 46 ℉ and 34 ℉ at an interval of 2 ℉ by pressing one button. 2-2) When the Fridge button is pressed, the current set temp will be displayed.And, when the button is pressed again within 5 seconds, it will carry out the following 2 -3) and when there is no button press for 10 seconds, it will display the finally selected temperature.
  • Page 28 Temp Control &Operation Functions 2) Super Cool Function 2-1) It is selected by pressing the Super Cool button. 2-2) When the Super Cool button is pressed once, Super Cool will be turned on. And then, it will repeat Off and On each time you press the button. 2-3) With the initial Power On, the LED is off.

  • Page 29: 11-4) Ice Off Function

    Temp Control &Operation Functions 11-4) Ice Off Function 1) Ice Off Function 1-1) Year 2005 W2 Model is one with Auto Ice Maker and Ice Water Valve. 1-2) When the Ice Off button is pressed,the Auto Ice Maker does not operate. 1-3) Ice stored in the ice bin is available with the Ice Off button selected.

  • Page 30: 11-6) Buzzer Alarm Function

    Temp Control &Operation Functions 11-6) Buzzer Alarm Function 1) Button Touch Tone ("DING-DONG") 1-1) When each button on the control panel is pressed,it will send out an input signaling "DING- DONG"sound. 1-2) When buttons are not pressed correctly,it won't send out the "DING-DONG"sound. 1-3) Buttons are recognized within 0.2 sec and when buttons are pressed continuously, it sends out only a "DING"sound.

  • Page 31: 11-8) Ice Maker Function (Only Applicable To Model With The Auto Ice Maker Function)

    Temp Control &Operation Functions 11-8) Ice Maker Function (Only applicable to Model with the Auto Ice Maker function) - This Ice Maker function is an option.So,the following can be applied only to Model mentioned. - Ice Maker has an automatic ice production function without extra controlling by users. It is a kit performing a series of automatic ice producing operation that it supplies water and stores ice in the ice bin upon the completion of ice production.
  • Page 32 Temp Control &Operation Functions 2-3) Water Supply/No Water Supply Evaluation by Ice Maker Sensor - When it passes one and a half minutes after the completion of water supply, it will evaluate Water Supply/No Water Supply by comparing the temp changes of the Ice Maker Sensor on the bottom of the Ice Tray.
  • Page 33 Temp Control &Operation Functions Low Water Pressure → High Water Pressure 1.5s 58+(5)MIN 58+(5)MIN 58+(5)MIN Water Supply Water Supply Water Supply High Water Pressure Low Water Pressure 3) Ice Making Function - It is until the water in the Ice Tray is judged as completely frozen after the completion of water supply operation.
  • Page 34 Temp Control &Operation Functions - 5th step:Restoration to Horizontal State (counter clockwise) The ice tray restores to its horizontal position by rotating the Ice Eject Motor counter clockwise When the Leveling S/W is ON (Low)after 5 seconds, it will stop rotating. At this point, the raised Feeler Arm will get lowered again and set on the highest point of stored ice to check the ice level.

  • Page 35: 11-9) Defrost Function

    Temp Control &Operation Functions 11-9) Defrost Function 1) The F/R-Room defrost depends on the accumulated comp-on time. 2) With the initial power on,defrost starts at the both rooms after 4 hour accumulated comp-on time. 3) The defrost cycle can be changed from Min 6 hours to Max 7 hours according to various conditions. 4) The defrost cycle depends on the ambient temperature,the frequency of F/R-Door open and the duration of the F/R-Door open.

  • Page 36: 11-11) Function When The Power Is Applied For The First Time

    Temp Control &Operation Functions 1-7) To cancel For ced Oper at i on,t ur n of f and on t he power or select the Test Cancellation Mode. 1-8) It will send out an alarm sound (0.25sec ON/0.75sec OFF)during Forced Operation until it is completed. It will keep on alarming regardless of the selection or cancellation of the alarm button.

  • Page 37: 11-12) Power Compensation Function

    Temp Control &Operation Functions 11-12) Power Compensation Function 1) Notch Save Function 1-1) Whenever the Super Freeze, Super Cool, Fridge or Freezer button is pressed, it will save the current display setting. And, when the power goes off and comes back on, it will display the stored setting. (But, the Test Mode will not be saved.) 1-2) Upon the initial power on,the above 1-1)will be performed when the F-Room temperature is lower than 41℉(5℃)and it will operate on the initial mode regardless of the saved setting when the temperature is...
  • Page 38 Temp Control &Operation Functions 2) Self-diagnosis with initial power on 2-1) When pressing the Super Freeze button and the Super Cool button simultaneously for 6 sec during normal operation, the entire temperature setting display will blink for 2 sec at the interval of 0.5 sec and when pressing the Super Cool button and the Super Cool button si mul taneousl y for 8 sec incl udi ng 2 sec bl i nki ng, self-diagnosis will be selected.
  • Page 39 Temp Control &Operation Functions - Descriptions for each Self Diagnosis Lamp Item Error Self Diagnosis SENSOR HOUSING SLIP-OUT, CONTACT VOLTAGE BETWEEN MAIN PCB CN30 DEFECT,WIRE CUT, WIRE SHORT, F-SENSOR ℉ SENSOR TEMP MORE THAN 122 ↔ 3 SHALL BE WITHIN 4.5V~1.0V. ℃...

  • Page 40: 11-14) Power Compensation Function

    Temp Control &Operation Functions 11-14) Power Compensation Function It is the initial Sensor Error Display. Hold on the Super Freeze and the Super Cool buttons for 3 seconds and take off the fingers. Then, press the Fridge button. 1) During the normal operation,when the Super Freeze and the Super Cool buttons are pressed for 3 seconds at the same time, the Freezer and the Fridge temp LEDs will blink for 2 seconds at the interval of 0.5 second.

  • Page 41: 11-15) Option Setting Function (Eeprom)

    Temp Control &Operation Functions 11-15) Option Setting Function (EEPROM) - During the normal operation,when the Super Cool and the Freezer buttons are pressed for 12 seconds,the Fridge or Freezer temp setting display will be shifted to the Option Setting Mode. How to Control Option Mode Shift Button by Model When the Super Cool and the Freezer buttons are pressed for 12 seconds at the same time, the Fridge/Freezer display will be shifted to the Option Setting Mode.
  • Page 42 Temp Control &Operation Functions Note Basically,when sending out products,their option will be all cleared. That is,their set values are all “0”. However, for the purpose of quality improvement, set values could be changed. Therefore, make sure to check quality information 2) After changing to the Option Mode,the display panel will blink "0"(ALL OFF)for R-Room and "0"(ALL OFF)for F-Room.

  • Page 43: 11-16) Option Table

    Temp Control &Operation Functions 11-16) Option Table 1) F-Room Temp Shift Table Set Item F-Room Temp Shift Model Common (All Models) LED:Fridge Option Item Set Value Option Value F-Room Temp Set Value 31.1℉(-0.5℃) 30.2℉(-1.0℃) 29.3℉(-1.5℃) 28.4℉(-2.0℃) 27.5℉(-2.5℃) 26.6℉(-3.0℃) 25.7℉(-3.5℃) 32.9℉(+0.5℃) 33.8℉(+1.0℃) 34.7℉(+1.5℃) 35.6℉(+2.0℃)
  • Page 44 Temp Control &Operation Functions 2) R-Room Temp Shift Table Set Item R-Room Temp Shift Model Common (All Models) LED:Fridge Option Item Set Value Option Value F-Room Temp Set Value 31.1℉(-0.5℃) 30.2℉(-1.0℃) 29.3℉(-1.5℃) 28.4℉(-2.0℃) 27.5℉(-2.5℃) 26.6℉(-3.0℃) 25.7℉(-3.5℃) 32.9℉(+0.5℃) 33.8℉(+1.0℃) 34.7℉(+1.5℃) 35.6℉(+2.0℃) 36.5℉(+2.5℃) 37.4℉(+3.0℃) 38.3℉(+3.5℃)
  • Page 45 Temp Control &Operation Functions - The following options are only applicable to the models with Ice Maker. The following can not be set to the models without Ice Maker 3) Ice Maker Sensor Temp Shift 4) Ice Maker Water Supply Time Control Function This is the standard temperature checking if ice in It is an option for Water Supply Time and it may be the ice tray is frozen completely.

  • Page 46: Operation Principles By Parts Of Circuit

    12. OPERATION PRINCIPLES BY PARTS OF CIRCUIT 12-1) SOURCE POWER CIRCUIT ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 12-2) OSCILLATION CIRCUIT ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 12-3) RESET CIRCUIT ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 12-4) EEPROM DETECTION CIRCUIT ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 12-5) DOOR SWITCH DETECTON CIRCUIT ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 12-6) TEMP SENSING CIRCUIT ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 12-7) ICE MAKER OPERATION CIRCUIT ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙...

  • Page 47: 12-1) Source Power Circuit

    OPERATION PRINCIPLES BY PARTS OF CIRCUIT 12-1) SOURCE POWER CIRCUIT Circuit Power MICOM POWER AND SENSORS Vcc(DC 5V) +12V(DC 12V) RELAY,PANEL DRIVING CIRCUIT 1) When the power is supplied,AC voltage stepped down on the 2nd transformer flows between ①and ③at about AC 16V and changes to DC voltage when it goes through the diode D101 and D108,and constant 12V will be output via regulator REG1(7812).And,it will supply DC5V to MICOM and power to other circuits via regulator REG2 (MC7805ACT),and make entire PCB operate.

  • Page 48: 12-3) Reset Circuit

    OPERATION PRINCIPLES BY PARTS OF CIRCUIT 12-3) RESET CIRCUIT Terminal Power DC 5V Reset DC 5V 1) RESET Circuit allows the whole program to go back to the initial setting by initializing parts such as the RAM in MICOM with the power supply into MICOM or with an instant power failure. Upon the power supply,the reset terminal voltage becomes "LOW"...

  • Page 49: 12-6) Temp Sensing Circuit

    OPERATION PRINCIPLES BY PARTS OF CIRCUIT MICOM DOOR OPEN/CLOSE DOOR S/W CONTACT POINT MICOM INPUT ITEM PIN NO CLOSE OPEN “HIGH” # 42 OPEN CLOSE “LOW” CLOSE OPEN “HIGH” # 43 OPEN CLOSE “LOW” 1) If F-Door is opened,the contact point of the door switch (4-1)becomes closed.Then,the power of the PCB line flows to the door switch through R404 and 0V is applied to the MICOM terminal.And, when the door is closed,the contact point of the door switch (4-1)becomes open.Then,the power of the PCB line supplies 5V to MICOM via R404 and R401,which...

  • Page 50: 12-7) Ice Maker Operation Circuit

    OPERATION PRINCIPLES BY PARTS OF CIRCUIT 12-7) ICE MAKER OPERATION CIRCUIT 1) The ice maker circuit above is to control the ice maker kit installed on the F room. This circuit is the hardware to control ejection and horizontal positioning,ice making temperature detection and full icing detection.

  • Page 51: 12-8) Display Driving Circuit

    OPERATION PRINCIPLES BY PARTS OF CIRCUIT 12-8) DISPLAY DRIVING CIRCUIT 1) KEY SCAN &DISPLAY DRIVING PRINCIPLE As shown in the wave diagram below,Micom sends out “high ”signals through the MICOM 6 terminals of NO #1→2→3→4→5→6 for 2ms each every 12ms.This signal goes to output terminal via input terminal of IC51 (TD62783AP or KID65783AP).

  • Page 52: 12-9) Load Driving Circuit

    OPERATION PRINCIPLES BY PARTS OF CIRCUIT 12-9) LOAD DRIVING CIRCUIT 1) The main PCB processes most of the load control for electronic refrigerators. 2) Compressor,F-Room,defrost heater,and other functions are controlled by relays. 3) For example,to operate the compressor,MICOM Pin #22 outputs high (5V)signals which go into IC70 Pin #7.The IC70 Pin #7 plays the same role as the base of NPN TR.The Pin #12 works as the collector of TR.

  • Page 53: 12-10) Buzzer Circuit Diagram

    OPERATION PRINCIPLES BY PARTS OF CIRCUIT 12-10) Buzzer Circuit Diagram 1) The circuit is composed of like the above and MICOM controls the alarm function with 2KHz.12V is always applied to the circuit.So,when MICOM sends alarm signals to Q801 Transistor Bass,the transistor is turned on applying 12V to the buzzer,which operates the buzzer.

  • Page 54: Diagnostics

    13. DIAGNOSTICS 13-1) When power is not supplied ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 13-2) If there is a trouble with self-diagnosis ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 13-3) When COMP does not operate ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 13-4) When FAN does not operate ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 13-5) When Defrost does not operate ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙ 13-6) When Alarm Sound continues without stop ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙...

  • Page 55: 13-1) When Power Is Not Supplied

    Diagnostics 13-1) When power is not supplied Pre-Check 1.Check if power is supplied at Concent and Power Cord is connected properly before repair 2.Check by referring to the followings. Start Is Power of primery DC -TRANS applied? (Power/Voltage) Check assembly of wires and do repairing Is Power of secondary DC -TRANS applied?

  • Page 56: 13-2) If There Is A Trouble With Self-Diagnosis

    Diagnostics 13-2) If there is a trouble with self-diagnosis 1) Ambient Sensor trouble =>(applied to Ambient Sensor Temp type) ERROR INDICATION Start Is Ambient Sensor normal?(At the top right hinge of the refrigerator) Change Ambient Sensor Is MAIN PCB (CN31) insertion normal? Connector contact trouble /re-insertion...
  • Page 57 Diagnostics 2) R-Room Temp Sensor trouble ERROR INDICATION Start Is R-Room Temp Sensor normal? Change Temp Sensor Is the insertion of MAIN PCB connector(CN30) normal? Connector contact trouble / re-insertion Is both trminal Voltage of NO (0.5V>Measured value) MAIN PCB �~� (BLUE-BROWN) normal? Reconfirm electric wire Refer to Temp detechion circuit...
  • Page 58 Diagnostics 4) F-Room Temp Sensor trouble ERROR INDICATION Start Is F-Room Temp Sensor normal? Change Temp Sensor Is the insertion of MAIN PCB connector(CN80) normal? Connector contact trouble /re-insertion Is both trminal voltago of NO (0.5V>Measured value) MAIN PCB �~� (Yellow-BROWN) normal? Reconfirm electric wire Refer to Temp detection circuit...

  • Page 59: 13-3) When Comp Does Not Operate

    Diagnostics 13-3) When COMP does not operate Pre-Check “Check out the COMP with the Forced Operation selected” 1. If it does not pass 5 min after a desired Temp reached,COMP does not operate. 2. During Defrost,COMP does not operate. 3. With the disconnected F-Sensor or R-Sensor,COMP does not operate because low temperature is detected.

  • Page 60: 13-4) When Fan Does Not Operate

    Diagnostics 13-4) When FAN does not operate Note "Check out the F-FAN with the Forced Operation selected" 1. F-Room FAN, R-Room FAN and COMP COOLING FAN remains OFF while COMP is off. (R-FAN can be on with the defrost function.) 2.
  • Page 61 Diagnostics 2) When R-Room FAN(R-FAN)does not operate Start Is it during Forced Operation? Start Forced Operation Does Fan operate with DOOR S/W presses?(Including Delay Time) Normal R-FAN Is the R-Room temperature a Fan-On condition? Check temp conditions, Select Super Cool Is DOOR S/W normal? Change DOOR S/W Is the...
  • Page 62 Diagnostics 3) When COMP COOLING FAN does not operate Start Is COMP operating? Operate Forced Operation Is it COMP COOLING FAN ON condition? Stand by for FAN ON condition Confirm FAN operating condition Ambient Temp Range Load Operation Status Comp Fan operates immediately upon COMP ON Higher than 71.6℉(22℃) Comp Fan operates in 3 min after COMP ON Between 62.6℉(17℃)~69.8℉(21℃)

  • Page 63: 13-5) When Defrost Does Not Operate

    Diagnostics 13-5) When Defrost does not operate Pre-Check 1. With a shorted-out F or R Defrost Sensor,the fridge operates normally excepting Defrost (The fault can be picked up with self-diagnosis,POWER ON/OFF). 2. There will be Heating trouble with a shorted-out Temp FUSE,which contributes to Defrost by natural Temp increase resulting in a Temp Control problem stemmed from the increased COMP OFF time.
  • Page 64 Diagnostics Does the Function return to the normal after Heating ? Normal Is each concerned Defrost Sensor Temp higher than the terminated Temp? Standby until it reaches a Refer to concerned Sensor resistance certain temperature ,Change (Appendix.Temp Sensing Circuit Table) concerned Sensor Is the input voltage of MICOM #54...

  • Page 65: 13-6) When Alarm Sound Continues Without Stop

    Diagnostics 13-6) When Alarm Sound continues without stop Note 1. When Door gets open,Door Open alarm ("Ding Dong")goes off in 2 minutes with Door opened.When Door remains open after this,the alarm goes off every minute. 2. When Door Switch is not pressed well,MICOM considers it as opened and alarming sound goes off.

  • Page 66: 13-7) Panel Pcb Defect

    Diagnostics 2) When “Beep Beep” sound continues Note 1. "Beep-Beep"sounds do not go off except Forced Operation &Forced Defrost. 2. It is checkable at Panel PCB when Forced Operation or Forced Defrost is selected,so when error occurs, check it and correct the error. Start Is Forced Operation/Defrost...

  • Page 67: 13-8) When Room Lamp Does Not Light Up(F &R Rooms Are The Same)

    Diagnostics 2) When PANEL PCB Buttons do not work Start Is Connector of Upper Hinge Cover inserted well? Re-insert Connector, Check contacts Is insertion of MAIN PCB Connector (CN50) normal? Re-insert MAIN PCB Connector, Check contacts Is insertion of PANEL PCB Connector normal? Re-insert PANEL PCB Connector, Check contacts...
  • Page 68 Diagnostics Start Is DOOR OPEN? DOOR OPEN Is DOOR SWITCH normal? Change DOOR SWITCH Is Room LAMP(R,F) normal? Change LAMP Is the contact state of connector CN70 & CN71 normal? Re-check the ccutact of the � CN70 PIN;F LAMP WIRE PIN connector CN70 &...

  • Page 69: 13-9) When Ice Water Valve Does Not Operate (Option)

    13-9) When Ice Water Valve does not operate (Option) Pre-Check 1. While disassembling,make sure to cut off water since the ice water valve is directly connected with water. 2. Make sure to avoid the electric shock while disassembling because one end of wire is applied with power.

  • Page 70: 13-10) When Ice Maker Does Not Operate (Option:model Installed)

    13-10) When Ice Maker does not operate (Option:Model installed) Pre-Check 1. Water is automatically supplied to the Ice Maker and it dispenses cubed or crushed ice according to its setting. 2. Power is applied to one of its wires.So,be sure to refer to its exploded view when disassembling.
  • Page 71 SAFETY PRECAUTIONS FOR AS ● Upon electronic Control system repair/change,make sure the set unplugged. � Be ware of electric shock. ● Use rated electronic Control equipment. � Make sure to check out ModeL name,Rated voltage,Rated current,Operation Temp,etc. ● Upon repair,make sure that harnesses are not to be water-penetrated and are bundled tight. �...

  • Page 72: Other

    15. Others 15-1) Others (Measure Load Terminals) * Turn off Power, disassemble Housing connected to MAIN PCB CN70,71 and measure followings MEASURING LOAD VALUE DEFECTS OTHERS TERMINALS PCB MAIN THERMAL FUSE,HEATER,WIRE SHORT 0 Ϊ CN70 1) F DEFROST HEATER VALUE FOR ⑬...
  • Page 73 * Turn on Power and check status of Relay &Driving Circuit by checking followings according to load operation . 3-CONTACT 3-CONTACT Note) NC →NORMAL CLOSE CN70 (C-TERMINAL & ON-TERMINAL) NO →NORMAL OPEN (C-TERMINAL & OPEN-TERMINAL) CN71 COIL TERMINAL C →COMMON TERMINAL TEIGER COIL Measure after...
  • Page 74 15-2) Others (Measure Sensor Terminals) * Check after disassembling connected to MAIN PCB CN30&CN32 * Because it is NTC TYPE Sensor,risistance decreases as temp increases 1. Measure resistance between CN30 for R-Sensor. ⑦ ⑥ 2. Measure resistance between CN30 ② ③...

  • Page 75: Pcb Diagram

    16. PCB DIAGRAM ⑧ ⑥ ⑨ ④ ⑫ ⑩ ② ⑤ ⑦ ③ ① 1. AC is input via Connector CN10 and DC12V,5V and GND are supplied via Regulator. 2. Oscillator generating clocks required for the MICOM program control &Reset circuit initializing programs upon power on/off.

  • Page 76: Connector Arrangement&Descriptions

    17. CONNECTOR ARRANGEMENT&DESCRIPTIONS...

  • Page 77: Block Diagram

    18. BLOCK DIAGRAM...

  • Page 78: Circuit Diagram

    19. CIRCUIT DIAGRAM...

  • Page 79: Wiring Schematic

    20. WIRING SCHEMATIC...

  • Page 80: Temp To Resistance Of Sensor &Micom Port Voltage

    21. Temp to Resistance of Sensor &MICOM PORT Voltage Sensor CHIP:PX41C Standard ℃ ℉ Ϊ ℃ ℉ Ϊ ℃ ℉ Ϊ 4.694 153319 3.107 16419 1.153 2997 -56.2 4.677 144794 24.8 3.057 15731 105.8 1.124 2899 -54.4 4.659 136798 26.6 3.006 15076 107.6...

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