Mitsubishi MR-LR78G-R Service Manual
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Mitsubishi MR-LR78G-R Service Manual

Mitsubishi MR-LR78G-R Service Manual

Home refrigerators
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MITSUBISHI
HOME REFRIGERATORS
SERVICE MANUAL
Models
MR-LR78G-DB-R
MR-LR78G-ST-R
R...................RUSSIA
R...................RUSSIA
CONTENTS
1. SPECIFICATIONS............................................................................
2. OUTLINES AND DIMENSIONS.......................................................
3. WIRING DIAGRAM..........................................................................
4. REFRIGERANT CIRCUIT................................................................
5. NAME OF THE PARTS....................................................................
6. TROUBLE SHOOTING....................................................................
6.1 TROUBLE CRITERION OF MAIN PARTS..........................
6.2 FUNCTION OF OPERATION PANEL..................................
6.3 FLOW CHART OF SELF CHECK........................................
7. DISASSEMBLY INSTRUCTIONS...................................................
8. PARTS LIST....................................................................................
Changes for the Better
2014
NO.SM-RE-1408
(Revised-A version)
1
3
4
6
7
8
8
11
16
19
20
26

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Summary of Contents for Mitsubishi MR-LR78G-R

  • Page 1: Table Of Contents

    Changes for the Better 2014 MITSUBISHI NO.SM-RE-1408 HOME REFRIGERATORS (Revised-A version) SERVICE MANUAL Models MR-LR78G-DB-R MR-LR78G-ST-R CONTENTS 1. SPECIFICATIONS................2. OUTLINES AND DIMENSIONS............3. WIRING DIAGRAM................4. REFRIGERANT CIRCUIT..............5. NAME OF THE PARTS..............6. TROUBLE SHOOTING..............6.1 TROUBLE CRITERION OF MAIN PARTS......

  • Page 2: Specifications

    SPECIFICATIONS 1-1 SPECIFICATIONS MR-LR78G-R 220V 50Hz Power supply L.(Net) L.(Net) 550 (F : 121 / R : 429) 550 (F : 121 / R : 429) Total capacity (ISO standard) L.(Gross) 635 (F : 182 / R : 453) Dimensions (HXWXD)
  • Page 3 1-2 ELECTRICAL PARTS SPECIFICATION MR-LR78G-R Model DHS73C10RAW Power supply 220/240V, 50Hz Rated input 124/125 (220/240V 50Hz) Compressor Starting current 7.78/8.55(220/240V 50Hz) Rated current 0.70/0.64(220/240V 50Hz) 18.4 (Main) / 18.5 (Aux) Winding resistance (A.T. 20   PTC RELAY PTHTM330MD2 Model...

  • Page 4: Outlines And Dimensions

    OUTLINES AND DIMENSIONS MR-LR78G-R Unit : mm DOOR DIMENSION RL : Refrigeratior compartment (Left) Height 1098 1098 RR : Refrigeratior compartment (Right) Width 396.5 546.5 396.5 546.5 FL : Freezer compartment (Left) FR : Freezer compartment (Right)

  • Page 5: Wiring Diagram

    WIRING DIAGRAM (SKELETON WIRING DIAGRAM) MR-LR78G-R...
  • Page 6 MR-LR78G-R (ACTUAL WIRING DIAGRAM) CN1A...

  • Page 7: Refrigerant Circuit

    REFRIGERANT CIRCUIT MR-LR78G-R Muffler Evaporator Suction pipe Capillary Cabinet pipe Condensor Charge pipe (High pressure side) Ø Dryer Compressor Charge pipe (Low pressure side) Ø 6.35...

  • Page 8: Name Of The Parts

    NAMES OF PARTS MR-LR78G-R...

  • Page 9: Trouble Shooting

    TROUBLE SHOOTING 6.1) TROUBLE CRITERION OF MAIN PARTS MR-LR78G-R Components/ Parts Mounted Check Method and Criterion Position Part Name Compressor in Model DHS73C10RAW the machine Rated input 124/125(220/240V 50Hz) chamber at the Starting current 7.78/8.55(220/240V 50Hz) rear side of Rated current 0.70/0.64(220/240V 50Hz)
  • Page 10 Components/ Check Method and Criterion Parts Mounted Position Part Name In the control panel Model 3612JL04WS36G51 of the refrigerator Type DC brushless compartment. Measure the resistance with a tester.(Ambient temperature:Room temperature 15 C ~ 25 Normal Abnormal (faulty) Between 3-1 : open( ) Between 3 - 1 (GND Refrigerator and Vcc): About 25k...
  • Page 11 Components/ Parts Mounted Check Method and Criterion Part Name Position Measure the resistance with a tester. In the drip tray Rated input 155 W (Ambient temperature:Room temp. 15°C ~ 25°C) under the Power ON after defrosting operation method evaporator of the Defrost (14 + 1.5 C or more)

  • Page 12: Function Of Operation Panel

    6.2) FUNCTION OF OPERATION PANEL (1) Function of normal operation ECO Mode SW * Pressing this button to Select ECO Mode Room Select SW / Temp Adjust SW * Pressing these R Room / F Room button and adjust each your preferred temp Rapid Cool SW Rapid Cool SW * Pressing this button for Rapid Cool...
  • Page 13 2. Panel operation mode during demonstration mode * The panel operation mode changes to “manual” if any of the switches is pressed. It changes to "auto" if none of the switches is pressed for 45 seconds since the last time any of the switches was pressed. * Manual mode: Panel indication changes according to switch operation.
  • Page 14 (5) Service Check Function 1) Out Line - The chart below shows the outline of service check function. - “Service check entry” needs to be set in order to perform each check mode. After setting “service check entry,” start the setting operation of the check mode to be displayed.
  • Page 15 2) Thermistor temperature check mode 1. With the refrigerator door opened, press simultaneously for 3 seconds (until a beep sound is heard). Then are blinking. * Press for 3 seconds. * Thermistor temperature check mode is not available during demonstration mode or Child lock mode. 2.
  • Page 16 3) Adjusting the set temperature Switch operation on the operation panel changes the set temperature in each compartment. 1. Setting With the refrigerator door opened, press simultaneously for 3 seconds (until a beep sound is heard). Then are blinking. With the door opened, press simultaneously for 3 seconds until a “beep”...

  • Page 17: Flow Chart Of Self Check

    6.3 ) FLOW CHART OF SELF-CHECK (1) Troubleshooting with self-check This refrigerator has self-check feature to clarify and indicate where & what the trouble is.You can perform operation checks and identify malfunction of electric or electronic parts.Error history is recorded and can be displayed by the refrigerator. self - check Operation the self check test (Remark 1)
  • Page 18 (2) Precaution in Self Check Mode * Trouble of Defrost heater : Self-check is conducted after defrosting. (Make sure to confirm the display before unplugging the power cord because it is automatically reset once the power cord is unplugged.) * Trouble of Fan motor : Open the door and then close it.When abnormality is found in fan motor, buzzer sound is heard every time the door is closed. * Trouble of Thermistor : Self-check is continuously working (3) Error display and trouble locating 1.Display Detail...
  • Page 19 Trouble Detecting method Check point How to fix Control ERROR CODE Trouble of When there is a short 1. Connector CN6S on control >Repair the Synchronize the open/ refrigerator or open circuit in the board, 4-pin wire to wire contact close status of R damper thermistor F-room thermistor.

  • Page 20: Test Point Diagram Of Main Control Board

    6.4 TEST POINT DIAGRAM OF MAIN CONTROL BOARD MR-LR78G-R Connect to series circuit of R. door sw (Both left & right side) and F. door sw(Both left & right side) 230/240 VAC Connect to parallel circuit between defrost heater & heater pipe at evaporator.

  • Page 21: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS MR-LR78G-R Plug out before work. In assembling & disassembling parts use several kind of screws and rivets. Do not mistake to use them. Rivet Rivet 4 x12 (Black) With metal washer 4 x12 Stainless steel OPERATING PROCEDURE PHOTOS Rivet Elect cover ->...
  • Page 22 OPERATING PROCEDURE PHOTOS 2. Part inside the refrigerator compartment : Photo 6 Rivet Control panel -> LED cover top assy -> Guide Remove interior parts from the refrigerator compartment : Glass shelf R assy(S), Glass shelf R assy(L) x 2, Glass top plate assy Utility case up assy, Utility case lr assy, Vegetable case assy, Partition( R ) Control panel Remove the rivets (6 rivets) and remove cover(control panel) at the middle...
  • Page 23 OPERATING PROCEDURE PHOTOS 3. Part inside the freezer compartment : Photo 10 Catch Ice Corner -> Lower Right cover(F) -> Partition(F) -> Connector cover (F) -> Fan grille -> Evaporator -> Defrost heater, Drip tray, DEF thermistor (1) Remove interior parts from the freezer compartment : F case up assy(M), F case low assy(L), F case low assy(S) x2, Ice tray assy, Ice box assy Ice Corner...
  • Page 24 OPERATING PROCEDURE PHOTOS (5) Remove the partition (F) by push it to right side(Direction as shown in arrow Photo 16 number 1 in photo 16) and then pull it out toward to you.(Direction as shown in arrow number 2 in photo 16) (Caution on installation) Please beware while re-installing this partition (F) again about that must be bring this air inlet pathway at the top side of partition (F) put into the air blow...
  • Page 25 OPERATING PROCEDURE PHOTOS DECOPANE R 3. Part outside at in front of ref : Decopane attach -> Decopane R Sliding Decopane attach directon Sliding Slide the decopane attach at both left & right side in direction as shown in photo 21 for remove them. Photo 21 Decopane DECOPANE　ATTACH...
  • Page 26 OPERATING PROCEDURE PHOTOS (Caution on assembly) When raising the rotational heater board, replace the rotational heater board as it was. If the refrigerator door is closed with the board raised, the rotational heater board may hit against the left door of refrigerator and be damaged.

  • Page 27: Parts List

    PARTS LIST DOOR PARTS MR-LR78G-R **15 Remark *6 : Display cover assy set contain decopane R(1pc), elect box(1pc), key top(4pcs) and decopane attach(2pcs) *15 : Handle attach 1 set for 1 door set(Same parts in each door) contain handle base door(2pcs), handle cover...
  • Page 28 DOOR PARTS Q'TY/UNIT PART NO. RoHS PART NAME SPEC MR-LR78G-R WITHOUT HANDLE ASSY, MAGNET GASKET ASSY KIEV94009 <G> DOOR RL AND ROTATIONAL HEATER BOARD, WITH HINGE UP KIEV95009 <G> ASSY (LEFT) KIEV97026 <G> DOOR CLOSER RL KIEV94747 <G> DOOR STOPPER LH KIEV94008 <G>...
  • Page 29 ACCESSORY PARTS MR-LR78G-R...
  • Page 30 ACCESSORY PARTS Q'TY/UNIT PART NO. RoHS PART NAME SPEC MR-LR78G-R KIEV94705 <G> HINGE COVER RH KIEV95705 <G> KIEV94701 <G> HINGE UP RH ASSY KIEV94858 <G> CONTROL PANEL ASSY KIEV94805 <G> COVER TOP (CONTROL PANEL) KIEV95805 <G> COVER (CONTROL PANEL) KIEV94405 <G> VEGETABLE CASE ASSY KIEV94703 <G>...
  • Page 31 ELECTRICAL AND UNIT PARTS MR-LR78G-R...
  • Page 32 ELECTRICIAL & UNIT PARTS Q'TY/UNIT PART NO. RoHS PART NAME SPEC MR-LR78G-R KIEV94363 <G> LED COVER TOP ASSY KIEMQ4363 <G> LAMP SWITCH (R) KIEV94180 <G> DISPLAY PCB ASSY KIEV94379 <G> VITAMIN UP KIEV94320 <G> FAN MOTOR ASSY (R) 3612JL04WS36G51 KIEV94682 <G>...
  • Page 33 PACKING PARTS MR-LR78G-R...
  • Page 34 PACKING PARTS Q'TY/UNIT PART NO. PART NAME SPEC RoHS MR-LR78G-R KIEV94975 <G> C.F.B TOP COVER KIEV94979 <G> TOP CUSHION KIEV94981 <G> FRONT CUSHION KIEV94978 <G> BOTTOM CUSHION KIEV94982 <G> F.SIDE CUSHION KIEV94969 <G> CUSHION FOAM PS KIEV94974 <G> C.F.B PALLET KIEV94971 <G>...
  • Page 35 KANG YONG ELECTRIC PUBLIC COMPANY LIMITED. 67 Moo 11, Bangna-Trad Road Km.20, Bangplee, Samutprakarn 10540 Thailand. TEL : 0-2337-2900 FAX : 0-2337-2954 http://www.mitsubishi-kye.com e-mail: information@kye.meap.com Printing Date : MAY 2014...

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Mr-lr78g-db-rMr-lr78g-st-r

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