All manuals and user guides at all-guides.com http://biz.lgservice.com REFRIGERATOR SERVICE MANUAL CAUTION BEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS" IN THIS MANUAL. MODEL: GA-B409U*QA/B379U*QA...
All manuals and user guides at all-guides.com CONTENTS SAFETY PRECAUTIONS .............................. 2 SERVICING PRECAUTIONS ............................3 SPECIFICATIONS ................................4 PARTS IDENTIFICATION ...............................6 REPLACEMENT OF DOOR OPENING TYPE ........................8 DISASSEMBLY ................................9 DOOR..................................9 DOOR SWITCH................................9 FAN AND FAN MOTOR..............................10 DEF' CONTROL ASM ....
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All manuals and user guides at all-guides.com SERVICING PRECAUTIONS Features of refrigerant (R600a) After the refrigerant (R600a) is completely discharged, repair any defective parts and replace the dryer. At any case you must use the LOKRING for • Achromatic and odor less gas. connecting or replacing any part in the cycle (No Fire, No Welding).
All manuals and user guides at all-guides.com SPECIFICATIONS 1.Ref. No: GA-B409U*QA ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DIMENSIONS (mm) 595(W)X651(D)X1896(H) Transparent Shelf(3 EA) NET WEIGHT (kg) Vegetable Container(1 EA) REFRIGERATOR COMPARTMENT COOLING SYSTEM Fan Cooling Vegetable Container Cover(1 EA) TEMPERATURE REFRIGERATOR Knob Dial Tray Meat (1 EA)* CONTROL FREEZER...
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All manuals and user guides at all-guides.com PARTS IDENTIFICATION Door Swich Utility Corner (movable) Removable Rotatable Glass Shelf(2 or 3) Door Basket (3 or 5) Lamp Multi-air Flow Duct Egg Tray Tray Meat (Optional) Refrigerator Temperature Control Vegetable Drawer Handle Used to keep fruits and vegetables, etc.
All manuals and user guides at all-guides.com REPLACEMENT OF DOOR OPENING TYPE Precaution Before reversing the door, first of all, you should take out food and accessories like shelves or trays which arenot fixed in the fridge-freezer. Use Torque Wrench or Spanner to fix or remove the bolt. Do not lay the fridge-freezer down.
All manuals and user guides at all-guides.com DISASSEMBLY 1. DOOR 2. DOOR SWITCH 1) Using the driver remove two small cap of the front. • Freezer Door 2) Loosen four screws in upper part and disconnect top cover. 1) Loosen 2 screws and pull the Cover Lower. 3) Disconnect Lead Wire from switch.
All manuals and user guides at all-guides.com 4 F AN AND F AN M O T OR 6 D AMPER CONT R OL 1) Rem o v e the C o v er Lam p , R and loosen 2 scr e w . 1) Rem o v e free z er d r a w er s .
All manuals and user guides at all-guides.com ADJUSTMENT 1. COMPRESSOR 3) PTC-Applied Circuit Diagram According to Starting Method for the Motor 1) Role The compressor intakes low temperature and low OVERLOAD PROTECTOR(O.L.P) pressure gas evaporated from Evaporator of the Refrigerator, and condenses this gas to high temperature and high pressure gas, and then plays delivering role to Condenser.
All manuals and user guides at all-guides.com 3. OLP (OVER LOAD PROTECTOR) CONTACTING 1) Definition of OLP POINT COVER (1) OLP (OVER LOAD PROTECTOR) is attached to the BIMETAL Hermetic Compressor and protects the Motor by cutting off current in Compressor Motor in case of CONTACTING over-rising temperature by Bimetal in the OLP.
All manuals and user guides at all-guides.com TROUBLESHOOTING (Mechanical Part) 1. COMPRESSOR AND ELECTRIC COMPONENTS Power Remove the Relay Assy (Rating V oltage Source. from the Compressor ±10%) and measure the voltage between T erminal C of Compressor and T erminals M or S of Relay Assy No V oltage.
All manuals and user guides at all-guides.com 2. RELAY ASSY (PTC AND OLP) Normal operation of Check another Observation value is Compressor is electric 220V/50Hz : 22 Ω ±30% Separate the Relay Assy 115V/60Hz : 6.8 Ω ア30% impossible or poor. components. from Compressor and 240V/50Hz : 33 Ω ±30% measure the resistance 127, 220V/60Hz : between M and S with a 22Ω±30% Tester or Whistone Bridge. (Figure 21) Replace The resistance value is 0 Relay Assy. or serveral hundreds Ω. The value is ∞ . Separate the Relay Assy Check another from the Compressor and electric components.
All manuals and user guides at all-guides.com 3. ANOTHER ELECTRIC COMPONENTS Cooling is impossible Compressor Check if current flows to Cause. doesn't run. the following components. a. Thermistor Poor contacting. b. Starting devices Shorted or broken. Poor contacting c. OLP or shorted.
All manuals and user guides at all-guides.com 4. SERVICE DIAGNOSIS CHART T B C D Cooling is • Is the power cord unplugged from the outlet? • Plug to the outlet. impossible. • Check if the power switch is set to OFF. •...
All manuals and user guides at all-guides.com 5. REFRIGERATING CYCLE Troubleshooting Chart TEMPERATURE STATE OF STATE OF THE CAUSE OF THE REMARKS THE SET EVAPORATOR COMPRESSOR PARTIAL Freezer room and Low flowing sound of Refrigerant A little high more than • A little Refrigerant discharges. LEAKAGE Refrigerator don't cool is heard and frost forms in inlet ambient temperature. • Normal cooling is possible normally. only. when injecting of Refrigerant the regular amount.
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All manuals and user guides at all-guides.com General Control of Refrigerating Cycle ITEMS CONTENTS AND SPECIFICATIONS REMARKS WELDING (1) H 30 • Recommend H34 containing 34% Ag in the Service ROD Center. • Chemical Ingredients Ag: 30%, Cu: 27%, Zn: 23%, Cd: 20% • Brazing Temperature: 710~840°C (2) Bcup-2 •...
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All manuals and user guides at all-guides.com LOKRING TUBE JOINT LOKRING Figure 23. LOKRING ASSEMBLY JAWS BOLT TOOL Figure 24. LOKRING TOOL -18-...
All manuals and user guides at all-guides.com MICOM FUNCTION & PCB CIRCUIT EXPLA N A TI O N This description is made for GA- B359 , B399 . Please refer to overall PCB circuits for other models. 1 FUNCTION EXPOSITION 1) FUNCTION •...
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All manuals and user guides at all-guides.com 3) SUPER FREEZING (1) It is the function which increases the cooling speed of freezer by continuously operating compressor and freezer fan. When it’s button is pressed, GRAPHIC is on. (2) Whenever selection switch is pressed, selection/release (GR APHIC on/off) changes in turn. (3) If power is on after power cut, SUPER FREEZING function is canc eled.
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All manuals and user guides at all-guides.com 5 ) DEFROSTING (1) If the accumulated time for the operation of the COMPRESSOR is meet with 7 hours, the DEFROSTING HEATER is started. (2) The rst defrosting is performed at 4 hours(compressor ON) later since the power is on. (3) If DEFROST SENSOR is over 7°C during DEFROSTING, end the operation of DEFROSTING with DEFROSTING HEATER paused, And after 7 minutes, the operation for the freezing is started.
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All manuals and user guides at all-guides.com O : OPERATE NORMAL OPERATION IN TROUBLE'S OCCURRING ITEMS DESCRIPTION ERROR CODE LEDs COMP DEFROST HEATER 15 minutes On/ FREEZER FREEZER SENSOR open 15 minutes O or short. SENSOR abnormal DEFROST DEFROST SENSOR open No defrosting or short.
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All manuals and user guides at all-guides.com 2 FUNCTION DESCRIPTION 1) ELECTRIC CIRCUITS 14821 TRANS secondary side is composed of electric power circuits for RELAY driving electricity (12Vdc) and for supplying electricit y to MICOM and IC (5Vdc). The voltage in each part is as follows. PARTS both ends of VA1 both ends of...
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All manuals and user guides at all-guides.com 4) LOAD/BUZZER OPERATION (1) LOAD OPERATION CHECK COMP, KIND OF LOAD FAN MOTOR DEFROSTING HEATER COMP COOLING FAN MEASURING POINT (IC5) No.C No.D No.E below 1V STATE If the DOOR-R is opened during FAN MOTOR is operated, FAN MOTOR is stopped immediately. The A , B of DOOR S/W-R is connected DOOR OPEN DETECTION CIRCUIT as follow.
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All manuals and user guides at all-guides.com 5) TEMP SENSOR CIRCUITS 28.2KF 28.2KF 16.2KF The above circuit reads the surrounding temperature, DEFROSTING temperature and FREEZER ROOM temperature into MICOM(IC1). OPEN or SHORT state of each SENSOR is as follows. SENSOR CHECK POINT NORMAL (-30°C~50°C) SHORT...
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All manuals and user guides at all-guides.com 7) TEMPERATURE COMPENSATION FREEZER ROOM RESISTANCE VALUES(R1) TEMPERATURE COMPENSATION REMARKS 180 k Ω C ° 56 k Ω +4.0°C 33 k Ω +3.0°C 18 k Ω +2.0°C 12 k Ω +1.0°C 10 k Ω C °...
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All manuals and user guides at all-guides.com • TEMPERATURE COMPENSATION OF FREEZER ROOM Revi s ed resi s tance 470 Ω 2k Ω 3.3k Ω 5.6k Ω 8.2k Ω 10k Ω 12k Ω 18k Ω 33k Ω 56k Ω 180k Ω Present resi s tance NO T 470 Ω...
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All manuals and user guides at all-guides.com 3. SENSOR RESISTANCE CHARACTERISTICS TABLE MEASURED TEMPERATURE RESISTANCE OF FREEZER SENSOR RESISTANCE OF DEFROST SENSOR, ROOM TEMPERATURE SENSOR C ° Ω 77k Ω C ° Ω 60k Ω Ω 47.3k Ω C ° Ω...
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All manuals and user guides at all-guides.com 2) REPLACEMENT PARTS LIST W O R K D E S C R I PTI ON S P E C ' M A K E R R E M A R K Q T Y Q T Y Q T Y Q T Y Q T Y Q T Y N O .
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All manuals and user guides at all-guides.com 3) P C B ASS'Y, DISPLAY AND PARTS LIST 0 1 W O R K D E S C R I P T I O N S P E C M A K E R R E A R K Q t y Q t y Q t y N o .
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All manuals and user guides at all-guides.com 5. PCB assembly,MAIN circuit drawing- The PCB assembly,MAIN circuit drawing may change without notice. CON1 XOUT POWER TEST RESET KIA7042 COMP HEATER (AIN5) (AIN4) (AIN3) TO DISP CON2 16.2K (AIN2) 13 2 26.1K (AIN1) 12 2 D-SENSOR...
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All manuals and user guides at all-guides.com 6. PCB assembly,display circuit drawing- The PCB assembly,displ ay circuit drawing may change without notice. 100uF LED1 FIG.1 FIG.2 COM1 COM2 COM3 COM4 COM1 COM2 COM3 4 .7K KIA7042AP CE13 RT-SENSOR CON1 R29 2K CC17 P37(BZ) REMARK...
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All manuals and user guides at all-guides.com EXPLODED VIEW & REPLACEMENT P ARTS LI S T Ref. No : GA-B409U*QA/B379U*QA The parts of refrigerator and the shape of each part are subject to change in different localities. 103B 281F 102A 103A 407B 281E...