LG LRTPC1831NI Service Servicing Precautions Download Page 26 | Manualshive

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Summary of Contents for LRTPC1831NI Service

Page 1: ... the melted alloy is sucked into the tubes and blocks them the pressure must be rebalanced when vacuum is in the system when soldering As soon as the vacuum operation is over add the quantity in grams of R 134a to the refrigeration system Remember that every system has an exact quantity of R 134a that can be added with a tolerance of 5grams Figure 4 TO THE R 134a CYLINDER _ _ TO THE REFRIGERATION ...

Page 2: ... i i it __ _ _ D _ i BK I I I I _ OFF OFF ON 12 a l_ l _Wl r__i_ _ l i _ _l K c_eReaim BK ON OFF ON 13sec I J I_ _clli_l r OFF ON ON 14sec L_4 Fp_t I I RD 3 C _ _ ON ON ON 15see LIWP F pAR1 C llp i llO_l 1 AE I LU6 l_pE EiiR114 piil_l _10 i_ _ Op1Xllt piCtT Ill iliRCLir r SWITCH OFF i 2 3 1_48_ 4H Q_ 8Ug JECT _10 C_r4Q_IN _ _RE_IT_ __J _ W1 _ SWI WI I M III_ BL BLUE RD RED eY GRkYPURPLE YL _tJ OW ...

Page 3: ...risper Used to keep fruits and vegetables fresh and crisp Base Grille Push the gdlle toward the refngerator untilit snaps into place Lamp Freezer Door Bin Door Cooling On the refrigerator door the cold air passageway is installedto supply cold air to the doorside of the refrigerator compa_ment Egg Tray Can Server Dairy Corner Can Storage Adjustable Door Bin Refrigerator Door Rack __ Leveling Screw...

Page 4: ...he lower hinge to the body to remove the refrigerator door only 3 2 DOOR SWITCH 1 To remove the door switch pull out it with a slotted type driver as shown in figure 9 Disconnect the lead wire from the switch LEAD WIRE Figure 9 3 3 THERMOSTAT 1 Remove Control Box R by loosening 2 screws attach_l to ceiling of Refrigeratoroompartrnent Figure 10 2 Separate the thermostat and dial knob F 3 Remove the...

Page 5: ...and replace the Defrost Control assembly after cutting the Tie Wrap Figure 14 SHROUD F Figure 13 DEF THERMO FUSE M HOLDER FUSE Figure 14 3 6 LAMP REFRIGERATOR ROOM LAMP Figure 16 1 3 6 1 Refrigerator room lamp 1 Unplug the power cord from the outlet 2 Remove refrigerator shelves 3 Release the hooks on beth ends of the lamp shield and pull the shield downward to remove it 4 Turn the lamp eeuntemloc...

Page 6: ... in both main coil and sub coil After the starting is over the current in subooil is cut off The proper features of PTC play all the above roles So PTC is used as a motor starting devise 4 2 3 PTC Applied Circuit Diagram According to Starting Method for the Motor OVERLOAD PROTECTOR O L P c I _ C q _ _ COMPRESSOR _ MOTOR PTC STARTER HERMETIC TERMINAL RSIR Figure 19 4 2 4 Motor Restarting and PTC Co...

Page 7: ... which flows to the Compressor Motor 4 3 2 Role of the OLP 1 The OLP is attached to the Hermetic Compressor used for the Refrigerator and prevents the Motor Coil from being started in the Compressor 2 Do not turn the Adjust Screw of the OLP in any way for normal operation of the OLR Composition and connection diagram of OLP 5 CIRCUIT DIAGRAM CONTACTING POINT COVER BIMETAL BIMETAL ADJUST SCREW HEAT...

Page 8: ...1 Check the I _ Check the resistance resistance of I among M C S C and Motor M S in Motor Compressor Compressor Check the _ Check the resistance resistance of I of two terminals in PTC Starter PTC Starter Es NO Replace PTC Starter YES I _ Check if applying _ _ OLP works w_hin __O _ YEs i _ _ _ a regular OLR _ 130 sec in forcible OLP Check OLR I I I operation by turning Replace OLR I I instant powe...

Page 9: ...OLF_ 21_igure 22 Check another I electric components I Replace PTC I Starter Normal operation of the Defrost Timer is impossible I No defrosting I Poor cooling r Position the Cam Shaft to the point of tirst click sound and check the current flowing between terminals No t brown and No 2 bright orange F Next position the Cam Shaft to the point of second click sound and check the current flowing betw...

Page 10: ...ing _ Shorted in sub ceil of I Compressor Check capacity of OLP The items described above are normal _ Lack of capecity Coil of motor Compressor Cooling ability is poor I Fan motor I_ Check current flowing Poor contacting doesn t run of the door S W t_ Checkin the FanCUrrentMotor fl wing I _ Coil is shorted Much frost is built upon L__ _ t Check the running _ Running is poor the EVAPORATOR conditi...

Page 11: ...se often or check if the door is closed it firmly Dew forms Check if ambient temperature and humidity Wipe dew with a dry cloth This occurrence in the Extedor Case of surroumcling air are high is solved naturally in low temperature and humidity Is there gap in the door gasket Fill up the gap Abnormal Is the set positioned in a firm and even place Adjuat the Adjust Screw and position noise in the f...

Page 12: ... t temperature Refrigerant _ _ Refrigeratordon tcool formed MOISTURE Cooling operation Flowing sound of refrigerant Lower than Cooling operation restarts CLOG stops periodically is not heard and frost melts ambient when heating the inlet of temperature capillary tube COMP Freezer and Low flowing sound of A little higher Low pressure at high side O mC RESSION Refrigerator refrigerant is heard and a...

Page 13: ... and low pressure sides Vacuum efficiency can be improved are evacuated st the same by operating compressor during time for models above 200 evacuation Vacuum EA Use R 134a exclusive To protect mixing The rubber pipes for R 12 refrigeront piping manifold of mineral and sha l he melted when they are used for ester oils R 134a refrigerant causes of leak P_sa EA Use R 134a exclusive To protect R 12 c...

Page 14: ...ing operation for dropping ices of ice removing tray from the ice bank If ices are not fully filled Perform ice removing contror after supplying water to the ice removing tray by operating solenoid of the ice valve As operation for the assembly line and service of refdgerator pressing a l Maker Test Switch allows to operate in the order of initial Pice removing water supply control step 1 Turning ...

Page 15: ...F _FI f_St e ON OFF _FF _ sec Em OFF ON _FF 10_ ON ON _F lf _ OFF OF c O_ 12_ c t3t GF F ON 1_ sec _H OFF ON ON f4saG ON ON ON fS_ Rema_s The quantity of water supply may differ depending on the setting status of the dip switch or on water pressure as water supply method is of a pattern of direct connec tion to water cock 3 The change of the quantity of water supply setting may be done according t...

Page 16: ...d makes ices be separated from the ice making tray In this case ice detecting lever automatically oper ates lifting operation with ice removing operation 4 Ice removing control positively rotates CW the ice removing motor and stops it for a second as it considers as maximum distortion point ice detecting axle 160 if the sensor signal changes from the Off status low to the On status high after 3 6 ...

Page 17: ...level the status immediately performs ice removing operation irrespective of the ice generation conditions of the ice making tray Caution shall be exercised as water may overflow if operating the test function at the water status that ice making is not done A cycle of water supply is performed at the level adjusting operation after ice removing operation Therefore the test button allows to check p...

Page 18: ...cuit is normal HALL IC Defect between PiN NO 20 of IC1 boards Be sure ice removing and returning to the level when pressing the TEST S W the level with the_ Normal I Defect of ice making KIT TEST S W Both ends of TEST S W 3 6 pin of PCB CON2 3 6 are at open status TEST S W Defect between boards PIN NO 19 of IC1 Defect of water supply Water supply valVe conduct current Water supply pump normally op...

Page 19: ...ower of more than 175V is applied 7 4 2 Vibration circuit XIN IC1 X0UT MICOM Circuit used for synchronous clock generation for transmitting receiving information of the inside logic elements of IC and basic time generation for calculating time Rated parts must be used as counting time is changed at the IC1 or the OSC1 does not operate if SPEC would be changed 7 4 3 Reset circuit MICOld The reset c...

Page 20: ...rive circuit 1 Load drive status check PO_ CON I G5N IA 47K I L_ l_ _ _ _ _ WAT EIRE_ALVEL_ _ Q2 11_ _S _ _ _ _ _L_JhT o_ _ ICI P_ MICOM Load Type Water Valve Measurement Location _ ON 1V below Condition OFF 12V 22 ...

Page 21: ...I 5 R6 4 BA6222 CM3 223_oov R7 7K c_ o RtO R9 K CCll J_ _ Rll 6 _ KF cc 2 _ 104 t_ CON2 7 T 3 ICE MAKER MOTOR ICE MAKER TEST S V ICE MAKER SENSDR This circuit is a cimuit 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 ...

Page 22: ...7 5 Main PWB Assembly and Parts List 7 5 t MAIN PW1B f 24 ...

Page 23: ... _WA 16 _F Z _0Ol____ JI _ _Z71O 14A _A_t _WA 6t_lB_ 12_NR14D271 _L JIN D5 c 1_ 0_040_0_ _CIIR_ IN4004 1_ c DI D4 19 _ IP S V 3P DIp ot_x SWl 2 3 _ RIVE 1C BA6222 _ IC5 21 061221_ J11 200uF 35_ 1 22 o _1_1_1 o_ CE2 24 _ _ _tgJ_ 2_ _F_Z71F_ _ 22CUF 16 V CE3 26 _47S1_ 47uF 25V 2_ _ _23 N4_ m oP_O ol 223 100v sin CMT CkI3 28 o_ _ _o_ oz 25v 3C _104_1_06 104 50V CC1 12 31 3_ _ 58J 1 2_ F_O zX 0m _B04 ...

Page 24: ...7 6 PWB DIAGRAM DI_ ___I_ T T _I T_i_ r__ _T _ cs _A Ds 47K I PI T _I F _ f_ I _F K Is Rc_o2M _ _ Q _ __ Msa VOWS TEST FJ_ O XIN XOUT RESET 26 ...

Page 25: ...oJ 104 F_ 4 7KX2 REVERSE FORWARg I R7 Rg I04_ 7 R11 104_ 2 IC5 BA6222 R8 7K K RF1 2KF C_4 IOOuF 25V 6 _ 2w o T 2c_ v 8 7 CON2 CE MAKER MOTOR 6 Z 3 Z ICE MAKER TEST S W CE MAKER SENSOR 4 10 12 t 3 16 24 25 26 CON101 F_ 7 WATER SUPPLYING TIME CONTROL S W 27 ...

Page 26: ...8 EXPLODED VIEW REPLACEMENT PARTSLIST The parts of refrigerator and the shape of each part are subject to change in different localities Capacitors and fuse are optional parts GR T622 GR T722 I I 28 ...

Page 27: ... 29 ...

Page 28: ...m_ i 30 i ...

Page 29: ...ICE MAKER PART 31 ...

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