Mitsubishi Electric MR-385S-W-A Service Manual
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Mitsubishi Electric MR-385S-W-A Service Manual

Home refrigerators
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MITSUBISHI
ELECTRIC
HOME REFRIGERATORS
SERVICE MANUAL
Models
MR-385S-W-A
MR-385S-ST-A
MR-385SL-W-A
MR-385SL-ST-A
MR-420S-W-A
MR-420S-ST-A
MR-455S-W-A
MR-455S-ST-A
A............Australia
A(NZ) .....New Zealand
MR-385S-W-A(NZ)
MR-385S-ST-A(NZ)
MR-385SL-W-A(NZ)
MR-385SL-ST-A(NZ)
MR-420S-W-A(NZ)
MR-420S-ST-A(NZ)
MR-455S-W-A(NZ)
MR-455S-ST-A(NZ)
CONTENTS
1. SPECIFICATIONS....................................................
2. OUTLINES AND DIMENSIONS..................................
3. WIRING DIAGRAM....................................................
4. REFRIGERANT CIRCUIT...........................................
5. NAME OF THE PARTS...........................................
6. TROUBLE SHOOTING..............................................
6.2 HOW TO CHECK P.C.BOARDS......................
MAIN CONTROL BOARD..............................
6.4 MULFUNCTION DISPLAY AND CHECKING
POINT...........................................................
7. DISASSEMBLY INSTRUCTIONS.................................
8. PARTS LIST...............................................................
Changes for the Better
2006
NO.SM-RE-0604
1
7
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Summary of Contents for Mitsubishi Electric MR-385S-W-A

  • Page 1: Table Of Contents

    Changes for the Better MITSUBISHI ELECTRIC HOME REFRIGERATORS SERVICE MANUAL 2006 NO.SM-RE-0604 Models MR-385S-W-A MR-385S-W-A(NZ) MR-385S-ST-A MR-385S-ST-A(NZ) MR-385SL-W-A MR-385SL-W-A(NZ) MR-385SL-ST-A MR-385SL-ST-A(NZ) MR-420S-W-A MR-420S-W-A(NZ) MR-420S-ST-A MR-420S-ST-A(NZ) MR-455S-W-A MR-455S-W-A(NZ) MR-455S-ST-A MR-455S-ST-A(NZ) CONTENTS 1. SPECIFICATIONS............ 2. OUTLINES AND DIMENSIONS........3. WIRING DIAGRAM............ 4. REFRIGERANT CIRCUIT...........

  • Page 2: Specifications

    SPECIFICATIONS 1.1 SPECIFICATIONS MR-385S-A MR-385SL-A MR-385S-A(NZ) MR-385SL-A Power supply 230/240V 50Hz 385 (F : 130 R : 255) Total capacity (Gross (AS)) Dimensions (HXWXD) 1591 x 685 x 700 Cabinet Acrylic resin coated steel Food liner ABS resin Cabinet Foamed cyclopenthane Insulation Freezer door Foamed cyclopenthane...
  • Page 3 MR-420S-A MR-420S-A(NZ) Power supply 230/240V 50Hz 420 (F : 130 R : 290) Total capacity (Gross (AS)) Dimensions (HXWXD) 1696 x 685 x 700 Cabinet Acrylic resin coated steel Food liner ABS resin Cabinet Foamed cyclopenthane Insulation Freezer door Foamed cyclopenthane Refrigerator door Foamed cyclopenthane Cooling system...
  • Page 4 MR-455S-A MR-455S-A(NZ) Power supply 230/240V 50Hz 454 (F : 130 R : 324) Total capacity (Gross (AS)) Dimensions (HXWXD) 1806 x 685 x 700 Cabinet Acrylic resin coated steel Food liner ABS resin Cabinet Foamed cyclopenthane Insulation Freezer door Foamed cyclopenthane Refrigerator door Foamed cyclopenthane Cooling system...
  • Page 5 1.2 ELECTRICAL PARTS SPECIFICATION MR-385S-A MR-385SL-A MR-385S-A(NZ) MR-385SL-A DG57C96RAW5 Model 220/240V 50Hz Power supply 106/108(220/240V 50Hz) Compressor Rated input Starting current 7.38/8.01(220/240V 50Hz) 0.57/0.55(220/240V 50Hz) Running current 18.2 (Main) / 17.7 (Aux) Winding resistance (A.T. : 20 Ω Ω PTH7M330MD2 PTC RELAY 5TM181NHBYY Model...
  • Page 6 MR-420S-A MR-420S-A(NZ) DG66C11RAW5 Model 220/240V 50Hz Power supply 117/118(220/240V 50Hz) Compressor Rated input Starting current 8.05/8.83(220/240V 50Hz) 0.71/0.66(220/240V 50Hz) Running current 15.4 (Main) / 17.7 (Aux) Winding resistance (A.T. : 20 Ω Ω PTH7M330MD2 PTC RELAY 5TM205NHBYY Model Motor protector Ambient temperature 16 MAX Time Sec.
  • Page 7 MR-455S-A MR-455S-A(NZ) DD66C13RAW5 Model 220/240V 50Hz Power supply 127/131(220/240V 50Hz) Compressor Rated input 8.3/9.1(220/240V 50Hz) Starting current Running current 0.63/0.61(220/240V 50Hz) (Main) / 28.7 (Aux) Winding resistance (A.T. : 20 Ω Ω PTH7M330MD2 PTC RELAY 5TM205NHBYY Model Motor protector Ambient temperature 16 MAX Time Sec.

  • Page 8: Outlines And Dimensions

    OUTLINES AND DIMENSIONS Unit : mm MR-385S-A MR-385S-A(NZ) MR-385SL-A MR-385SL-A(NZ) PLUG CORD LENGTH REQUIRED SPACE FOR INSTALLATION - 7 -...
  • Page 9 Unit : mm MR-420S-A MR-420S-A(NZ) PLUG CORD LENGTH REQUIRED SPACE FOR INSTALLATION - 8 -...
  • Page 10 Unit : mm MR-455S-A MR-455S-A(NZ) PLUG CORD LENGTH REQUIRED SPACE FOR INSTALLATION - 9 -...

  • Page 11: Wiring Diagram

    WIRING DIAGRAM (SKELETON WIRING DIAGRAM) MR-385S-A MR-385S-A(NZ) MR-385SL-A MR-385SL-A(NZ) MR-420S-A MR-420S-A(NZ) MR-455S-A MR-455S-A(NZ) (ACTUAL WIRING DIAGRAM) - 10 -...

  • Page 12: Refrigerant Circuit

    REFRIGERANT CIRCUIT MR-385S-A MR-385SL-A MR-420S-A MR-385S-A(NZ) MR-385SL-A(NZ) MR-420S-A(NZ) - 11 -...
  • Page 13 MR-455S-A MR-455S-A(NZ) - 12 -...

  • Page 14: Names Of Parts

    NAMES OF PARTS MR-385S-A MR-420S-A MR-385S-A(NZ) MR-420S-A(NZ) MR-385SL-A MR-455S-A MR-385SL-A(NZ) MR-455S-A(NZ) - 13 -...

  • Page 15: Trouble Shooting

    6 TROUBLE SHOOTING 6.1 TROUBLE CRITERION OF MAIN PARTS MR-385S-A MR-385SL-A MR-420S-A MR-455S-A MR-385S-A(NZ) MR-385SL-A(NZ) MR-420S-A(NZ) MR-455S-A(NZ) Parts Mounted Components/ Check Method and Criterion Part Name Position Compressor Compressor in MR-385S/SL MR-420S,455S the machine Model DG57C96RAW5 DG66C11RAW5 chamber at the Rated input 106/108(220/240V 50Hz) 117/118(220/240V 50Hz)
  • Page 16 Components/ Check Method and Criterion Parts Mounted Position Part Name In fan grill of the freezer compartment. UDVH15MA1H Model Measure the resistance with a tester. Refrigerator (Ambient temperature:Room temperature 15 C ~ 25 fan motor Normal Abnormal(faulty) 560+ 10% ( Ω ) Short (0Ω) Rated input 150 W...

  • Page 17: How To Check P.c.boards

    6.2 HOW TO CHECK P.C BOARDS MR-385S-A MR-385SL-A MR-420S-A MR-455S-A MR-385S-A(NZ) MR-385SL-A(NZ) MR-420S-A(NZ) MR-455S-A(NZ) (1) Precautions Unplug unit before checking If the controller P.C. board box is opened with the refrigerator inside cooled, dew will form on the control board, causing trouble such as poor insulation.

  • Page 18: Test Point Diagram Of Main Control Board

    6.3 TEST POINT DIAGRAM OF MAIN CONTROL BOARD MR-385S-A MR-385SL-A MR-420S-A MR-455S-A MR-385S-A(NZ) MR-385SL-A(NZ) MR-420S-A(NZ) MR-455S-A(NZ) - 17 -...
  • Page 19 6.4 Malfunction Display and Checking points. 6.4.1 ) Malfunction display will use LED for show self-check 6.4.2 ) Fucntion display Lighting mode (time amount) will blink by on 3 min. as fixed times amount after that will off 5 seconds, which will repeat as cycle sample. 1 time 2 times 1 time...

  • Page 20: Importance Detail Of Fault Analysis

    6.5 Importance detail of fault analysis 6.5.1 Flow chart of self - check 1) Self - check monitor circuit For show the fault condition of refrigerator and clarify point. Therefore, self - check monitor control is provided that are able to monitor No. of blinking condition with electric circuit and electric part . Before disconnect power plug please confirm LED self - check .

  • Page 21: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS MR-385S-A MR-385SL-A MR-420S-A MR-455S-A MR-385S-A(NZ) MR-385SL-A(NZ) MR-420S-A(NZ) MR-455S-A(NZ) Unplug the power cord before prepairing and servicing OPERATING PROCEDURE PHOTOS Photo 1 1. Remove parts insider the Freezer room (1) Photo 1st Remove Crystal shelf Freezer, Ice corner tray assy, Ice tray, Ice box Crystal shelf F Ice tray Fan Grille...
  • Page 22 OPERATING PROCEDURE PHOTOS Photo 6 2. Remove parts inside the refrigerator (1) Remove chilled case door and slide chilled case , remove glass shelves of refrigerator room , remove Control panel Thermo dial F Rivets the control panel Thermo dial R (Photo 6) (2) Remove lamp cover R Lamp cover R...
  • Page 23 OPERATING PROCEDURE 3. Removing the compressor (1) Detach the drain pan. Compressor (2) Collect gas from the charge pipe on the high pressure side. (3) After collecting gas, cut the charge pipe on the low pressure side. (4) Detach the welded section of the discharge pipe and suction pipe (5) Replace the compressor and the dryer at a time.

  • Page 24: Parts List

    PARTS LIST DOOR, BODY PARTS MR-385S-A MR-385S-A(NZ) MR-385SL-A MR-385SL-A(NZ) MR-420S-A MR-420S-A(NZ) MR-455S-A MR-455S-A(NZ) - 23 -...
  • Page 25 Q'TY/UNIT 385SL 385SL 455S 385S 420S PART NO. RoHS PART NAME SPEC PRICE A(NZ) A(NZ) A(NZ) A(NZ) W ST W ST W ST W ST W ST W ST W ST W ST KIEK66131 FREEZER POCKET 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 KIE401115 EGG RACK 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2...
  • Page 26 ACCESSORY PARTS MR-385S-A MR-385S-A(NZ) MR-385SL-A MR-385SL-A(NZ) MR-420S-A MR-420S-A(NZ) MR-455S-A MR-455S-A(NZ) - 25 -...
  • Page 27 Q'TY/UNIT 385SL 385SL 455S 385S 420S PART NO. RoHS PART NAME SPEC PRICE A(NZ) A(NZ) A(NZ) A(NZ) W ST W ST W ST W ST W ST W ST W ST W ST KIEH79662 BELL MOUTH KIEH79473 LAMP COVER (F) KIEH79663 ...
  • Page 28 ELECTRICIAL PARTS AND UNIT PARTS MR-385S-A MR-385S-A(NZ) MR-385SL-A MR-385SL-A(NZ) MR-420S-A MR-420S-A(NZ) MR-455S-A MR-455S-A(NZ) - 27 -...
  • Page 29 Q'TY/UNIT 385SL 385SL 455S 385S 420S PART NO. RoHS PART NAME SPEC PRICE A(NZ) A(NZ) A(NZ) A(NZ) W ST W ST W ST W ST W ST W ST W ST W ST KIEH79336 THERMAL FUSE ( DEF ) 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 KIEHD2366 ...
  • Page 30 PACKING PARTS MR-420S-A MR-385S-A MR-420S-A(NZ) MR-385S-A(NZ) MR-455S-A MR-385SL-A MR-455S-A(NZ) MR-385SL-A(NZ) NO STEP ON C.F.B TOP COVER TOP CUSHION MID C.F.B BOX ASSY TOP CUSHION SIDE CUSHION ASSY PACKING COVER C.F.B PALLET BOTTOM CUSHION - 29 -...
  • Page 31 Q'TY/UNIT 385SL 385SL 455S 385S 420S PART NO. PART NAME SPEC RoHS PRICE A(NZ) A(NZ) A(NZ) A(NZ) W ST W ST W ST W ST W ST W ST W ST W ST KIEK88970 KIEK89970 KIEK90970 KIEK92970 ...
  • Page 32 MITSUBISHI ELECTRIC CORPORATATION HEAD OFFICE : MITSUBISHI DENKI BLDG., MARUNOUCHI,TOKYO 100. TELEX : J24532 CABLE MELCO TOKYO Distributed by Mitsubishi Electric Australia MITSUBISHI ELECTRIC AUSTRALIA PTY LTD. (Incorporated in New South Wales) ABN 58 001 215 792 New South Walse :...

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