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REFRIGERATOR SERVICE MANUAL CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. MODEL : LRTBC1825T COLOR: TITANIUM LRTBC2025T...
CONTENTS SAFETY PRECAUTIONS ............................... 2 SERVICING PRECAUTIONS..............................3 SPECIFICATIONS................................... 4 PARTS IDENTIFICATION ............................... 5 DISASSEMBLY..................................6-7 DOOR....................................6 DOOR SWITCH..................................6 THERMOSTAT ..................................6 FAN AND FAN MOTOR................................ 7 DEFROST CONTROL ASSEMBLY............................7 LAMP....................................7 CONTROL BOX-R................................7 ADJUSTMENT..................................8 COMPRESSOR..................................
SERVICING PRECAUTIONS AIR RECHARGING IN COMPRESSOR vacuum operation is over, add the quantity in grams of R-134a to the refrigeration system. Remember that every Test the refrigeration system connecting it electrically before system has an exact quantity of R-134a that can be added refilling operation.
1. SPECIFICATIONS 1. Ref. No.: LRTBC1825T ITEMS SPECIFICATIONS ITEMS SPECIFICATIONS DOOR DESIGN All Rounded VEGETABLE TRAY Transparent Drawer Type DIMENSIONS (mm) 754.5 1732 (W COMPRESSOR PTC Starting Type NET WEIGHT (kg) EVAPORATOR Fin Tube Type COOLING SYSTEM Fan Cooling CONDENSER...
2. PARTS IDENTIFICATION FREEZER COMPARTMENT Freezer Shelf Lamp Automatic Ice Maker Freezer Door Bin Ice Cube Box Freezer Temperature Door Cooling Control Dial On the refrigerator door, the cold air passageway is REFRIGERATOR installed to supply cold air to the doorside of COMPARTMENT the refrigerator compartment.
3. DISASSEMBLY 3-1 DOOR 3-2 DOOR SWITCH 1. To remove the door switch, pull out it with a slotted type Freezer Door 1. Remove the hinge cover by pulling it upwards. driver as shown in (figure 9). 2. Loosen hexagonal bolts fixing the upper hinge to the 2.
3-4 FAN AND FAN MOTOR 3-6 LAMP 1. Remove the freezer shelf. (If your refrigerator have an Ice Maker, disassemble the Ice maker first) REFRIGERATOR ROOM LAMP 2. Remove the grille by pulling it out and by loosening a screw. 3.
4. ADJUSTMENT 4-1 COMPRESSOR 4-2-3 PTC-Applied Circuit Diagram According to Starting Method for the Motor 4-1-1 Role The compressor intakes low temperature and low pressure gas evaporated from evaporator of the refrigerator, and OVERLOAD PROTECTOR(O.L.P) condenses this gas to high temperature and high pressure gas, and then plays delivering role to condenser.
(2) Do not turn the Adjust Screw of the OLP in any way for SCREW normal operation of the OLP. (Composition and connection diagram of OLP) Figure 21 HEATER 5. CIRCUIT DIAGRAM Ref. No.: LRTBC1825T Ref. No.: LRTBC2025T - 9 -...
6. TROUBLESHOOTING 6-1 COMPRESSOR AND ELECTRIC COMPONENTS Remove the PTC- (Rating Voltage Power Source. Starter from the ±10%)? Compressor and measure the voltage between Terminal C of Compressor and Terminals 5 or 6 of PTC. OLP disconnected? No Voltage. Replace OLP. Check connection condition.
6-2 PTC AND OLP Normal operation of Check another Separate the PTC- Observation value is Compressor is Starter from electric components. 220V/50Hz : 22Ω±30% Compressor and impossible or poor. 115V/60Hz : 6.8Ω±30% measure the 240V/50Hz : 33Ω±30% resistance between 127, 220V/60Hz : 22Ω No.
6-4 OTHER ELECTRIC COMPONENTS Cooling is impossible Compressor Check if current flows to Cause doesn't run. the following components. Poor contacting and a. Thermostat gas leakage. b. Starting devices Shorted or broken. Poor contacting c. OLP or shorted. Coil shorted. d.
6-4 SERVICE DIAGNOSIS CHART COMPLAINT POINTS TO BE CHECKED REMEDY Cooling is • Is the power cord unplugged from the outlet? • Plug to the outlet. impossible. • Check if the power S/W is set to OFF. • Set the switch to ON. •...
6-5 REFRIGERATING CYCLE Troubleshooting Chart TEMPERATURE STATE OF STATE OF THE CAUSE REMARKS OF THE THE SET EVAPORATOR COMPRESSOR PARTIAL Freezer Low flowing sound of A little higher • Refrigerant level is low due LEAKAGE compartment and Refrigerant is heard and than ambient •...
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General Control of Refrigerating Cycle ITEMS UNIT STANDARDS PURPOSES REMARKS Pipe and Min. Pipe: within 1 hour. To protect The opening time should be reduced piping system Comp: within 10 minutes. moisture to a half of the standards during rain opening time Drier: within 20 minutes.
7. OPERATION PRINCIPLE AND REPAIR METHOD OF ICE MAKER This manual describes function of models adhering Ice Maker. 7-1 OPERATION PRINCIPLE 7-1-1 Operation principle of Ice Maker Power Input Initial Control • Keep a level of ice-removing tray with “initial control” inputting power.
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7-2 Function of Ice maker 7-2-1 Initial control function 1. The level of the ice-removing tray (ice-removing container) after completing the MICOM initialization in the initial POWER ON,returning to electricity failure and turning-off of ice-making stop switches. Namely, detection lever operates up and down. 2.
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7-2-4 Ice-removing control function 1. Ice-removing control means operation to separate ice within ice-making tray ( ice-making container) after ice-making is completed. 2. Step to check ices stored at the ice bank (container for storing ice) are fully filled. It is considered as they are fully filled if signals of the hall sensor are at the On status (“high”) before 3.6seconds after rotating positively the ice-making motor.
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7-2-5 Test Function 1. Function used compulsory operation for the purpose of performing operation test, service and cleaning. This test function is performed if pressing the test switch mounted on the automatic ice-maker itself for 0.5 second or more. 2. The test button operates when the test function is not input but at the level status. It does not perform ice-removal control and water supply control if ices are full during operation of test function 3.
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7-3 Failure diagnosis method of ice maker Replacement of DC power (5V,12V) is Defect of power terminal MAIN PCB normally output? • Check DC power (5V,12V) Normally perform ice-removing and returning to Replacement of Defect of ice-making sensor the level if pressing TEST S/W ice-making sensor for more than 0.5 •...
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7-4 Explanation of ice maker circuits 7-4-1 Power circuit The secondary party of transformer consists of power (12Vdc) for driving display and relay and power (5Vdc) supplying power to MICOM and IC. In this case, voltage at each part is as follows: Part Both ends of VA1 Both ends of CE2...
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7-4-4 Load drive circuit 1. Load drive status check Load Type Water Valve Measurement Location 1V below Condition - 22 -...
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7-4-5 ICE MAKER drive/circuit This circuit is a circuit used to embody functions such as ice-removing, full-ice detection, level noise, and ice-making tem- perature detection of ice-making tray (ice-making container). - 23 -...
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7-5 Main PWB Assembly and Parts List 7-5-1 MAIN PWB - 24 -...
8. EXPLODED VIEW & REPLACEMENT PARTS LIST The parts of refrigerator and the shape of each part are subject to change in different localities. 401A Capacitors and fuse are optional parts. 103B GR-T622, GR-T722 281A 301A 281B 103A 282E 418A 411A 282C 120A...