Logik LUF55B13, Service Manual

Page 1: ...Refrigerator Service Manual Models LUF55B13 Features Energy efficiency Micro foam technology Low noise operation Thick insulation for energy efficiency Latest No 2 micro biological technology 0...

Page 2: ...code illumination and Series Introduction 2 3 Specifications 3 4 Safety precautions 4 5 Function Schedule 7 6 System Flow Chart 8 7 Circuit Diagram 9 8 Maintenance Service and Trouble Shooting 10 9 E...

Page 3: ...55B13 86 Color Black Power Supply V Hz 220V 50HZ Rated Input Power W 70 Power Consumption kW h Y 183 Net Weight kg 32 1 Gross Weight kg Unit Dimension D W H mm Packing Dimension D W H mm Container Qua...

Page 4: ...Safety precautions Safety precautions 4...

Page 5: ...Safety precautions 5...

Page 6: ...Safety precautions 6...

Page 7: ...Function Schedule Function Schedule Energy efficiency Micro foam technology Low noise operation Thick insulation for energy efficiency 7...

Page 8: ...System Flow Chart System Flow Chart 1 Schematic diagram of System Flow Chart Flows in the sequence 1 2 3 4 5 1 8...

Page 9: ...Circuit Diagram Circuit Diagram 1 Schematic Circuit Diagram 9...

Page 10: ...ower NO Check and repair according to the section of the compessor doesn t work YES If compressor can run naturally and temperature raising of condenser is very low YES NO Refrigerant leak check and r...

Page 11: ...capacity insufficient NO Check and repair according to the section of Cooling capacity is insuffcient YES 1 The thermostat was set at the coldest position 2 The ambient temperature is very high or th...

Page 12: ...ing 3 Cooling capacity is insufficient Cooling capacity is insufficient Is the ambient YES temperature low than 16 C Check the therostat is correct YES NO Does the refrigerant leak siowly Adjust and i...

Page 13: ...he power source and power cord NO Repair YES YES Is the ambient temperature low than 16 YES Check the therostat is correct Adjust and instruct consumer how to use Does the control panel has 220V power...

Page 14: ...the pressure difference is still greater after the compressor has just stopped running the refrigerant will flow for a certain time therefore this sound is a normal phenomenon 2 A click sound can oft...

Page 15: ...efrigerator locations and natures of troubles should be determined according to their respective features therefore experience in servicing is very important to troubleshooting Service technicians wit...

Page 16: ...d by a sound similar to water flowing this is the sound produced by the normal circulation of refrigerant within the evaporator In case only the gas flowing sound can be heard and there is no water fl...

Page 17: ...y due to a certain trouble With this method you can reject some suspicious troubles and finally make a correct judgment 7 Analysis of Troubles and Troubleshooting A Poor Refrigerating Effect The so ca...

Page 18: ...essive refrigerant has been charged the liquid refrigerant that cannot evaporates in the evaporator will return to the compressor and thus a phenomenon of liquid striking will occur The liquid refrige...

Page 19: ...ator regularly if you fail to do so the frost layer on the evaporator tubing will become thicker and thicker Heat conduction will be severely affected when the whole tubing is wrapped with a transpare...

Page 20: ...rant and seal the charging port B No Refrigerating The phenomenon that the compressor runs normally but no frost or only a little frost appears on the evaporator and the refrigerator temperature does...

Page 21: ...t these phenomena will appear intermittently sometimes the refrigerator works well and sometimes not well In order to determine whether it is clogged with ice heat the suspicious points with hot water...

Page 22: ...gging with dirt 3 Troubles of Compressor a Breakage of gas suction and discharge valve blocks Analysis of Trouble The compressor works by means of the opening and closing of gas suction valve and disc...

Page 23: ...he system Analysis of Trouble The residual air in the system will circulate together with the refrigerant in the system The major symptoms caused by this residual air is higher gas discharge pressure...

Page 24: ...er supply c Abnormal thermal protection Analysis of Trouble The compressor current is within its normal range but the thermal protector actuates repeatedly Remedy Replace the thermal protector with a...

Page 25: ...he user for buying a stabilizer so as to step up the voltage thus normal operation can be achieved 3 Check the thermal relay to see whether its contacts are closed Analysis of Trouble The contacts of...

Page 26: ...caused mostly by poor lubrication such ad insufficient quantity of lubricant clogging in the lubricant oil line or intermittent lubricant oil supply Dirt and other impurities in the lubricant oil will...

Page 27: ...rated value the thermostat won t work thus the compressor runs continuously When the evaporation temperature in the system is too high the temperature sensing agent in the temperature sensor is also h...

Page 28: ...up intensively measure the resistance between the power cord plug and the case body with an avometer the reading will be zero 0 in the worst case the fuse will be blown Check the 3 prong outlet to se...

Page 29: ...tion becomes weake or vanishes If the refrigerator has not been levelly placed put a level meter on its top table and adjust the leveling screws on its legs In case noise occurs from the compressor st...

Page 30: ...6 501107030002 Thermostat box 1 7 501107030003 Thermostat box cover 1 8 501107030008 Thermostat panel 1 9 501107030011 Thermostat knob 1 10 502905040040 Down Hinge 1 11 502500300010 Screw 6 12 501106...

Page 31: ...502500100058 Screw 1 24 501108630010 Thermostat 1 25 501108330012 decoration strip evaporator 3 26 502401000473 Power cord 1 27 502501200010 Screw 4 28 500724540018 CompressorBase 1 29 Grommet 4 30 sl...