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Mitsubishi Electronics MR-420R-ST-A(NZ) manual

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Table of contents for the manual

  • Page 1

    MITSUBISHI 2005 HOME REFRIGERATORS SERVICE MANUAL Models MR-385R-W-A MR-385R-ST-A MR-420R-W-A MR-420R-ST-A MR-455R-W-A MR-455R-ST-A CONTENTS NO.SM-RE-0502 1. SPECIFICATIONS.................................................... 2. OUTLINES AND DIMENSIONS.................................. 3. WIRING DIAGRAM...............................................[...]

  • Page 2

    1.1 SPECIFICATION MR-385R-A MR-385R-A(NZ) Power supply 230/240V 50Hz Total capacity (Gross (AS)) L Dimensions (HXWXD) mm. 1591 x 685 x 700 Cabinet Acrylic resin coated steel Food liner ABS resin Cabinet Foamed cyclopenthane Freezer door Foamed cyclopenthane Refrigerator door Foamed cyclopenthane Cooling system Freezer Forced air convection Refriger[...]

  • Page 3

    MR-420R-A MR-420R-A(NZ) Power supply 230/240V 50Hz Total capacity (Gross (AS)) L Dimensions (HXWXD) mm. 1696 x 685 x 700 Cabinet Acrylic resin coated steel Food liner ABS resin Cabinet Foamed cyclopenthane Freezer door Foamed cyclopenthane Refrigerator door Foamed cyclopenthane Cooling system Freezer Forced air convection Refrigerator Surround cool[...]

  • Page 4

    MR-455R-A MR-455R-A(NZ) Power supply 230/240V 50Hz Total capacity (Gross (AS)) L Dimensions (HXWXD) mm. 1806 x 685 x 700 Cabinet Acrylic resin coated steel Food liner ABS resin Cabinet Foamed cyclopenthane Freezer door Foamed cyclopenthane Refrigerator door Foamed cyclopenthane Cooling system Freezer Forced air convection Refrigerator Surround cool[...]

  • Page 5

    1.2 ELECTRICAL PARTS SPECIFICATION MR-385R-A MR-385R-A(NZ) Model Power supply Compressor Rated input W Starting current A Running current A Winding resistance (T : 20 o C) PTC RELAY Model Motor protector Ambient temperature o C Time Sec. Current A Running capacitor Capillary tube mm. Dehydrant Molecular sieve g Refrigerant HFC. 134a g Defrosting co[...]

  • Page 6

    MR-420R-A MR-420R-A(NZ) Model Power supply Compressor Rated input W Starting current A Running current A Winding resistance (T : 20 o C) PTC RELAY Model Motor protector Ambient temperature o C Time Sec. Current A Running capacitor Capillary tube mm. Dehydrant Molecular sieve g Refrigerant HFC. 134a g Defrosting control Defrosting timer Defrost fini[...]

  • Page 7

    MR-455R-A MR-455R-A(NZ) Model Power supply Compressor Rated input W Starting current A Running current A Winding resistance (T : 20 o C) PTC RELAY Model Motor protector Ambient temperature o C Time Sec. Current A Running capacitor Capillary tube mm. Dehydrant Molecular sieve g Refrigerant HFC. 134a g Defrosting control Defrosting timer Defrost fini[...]

  • Page 8

    Unit : mm MR-385R-A MR-385R-A(NZ) - 7 - 2 OUTLINES AND DIMENSIONS 20 685 20 1334 454 40 100 1591 700 REQUIRED SPACE FOR INSTALLATION 1950 PLUG CORD LENGTH 568 685 8 1591 942 73[...]

  • Page 9

    Unit : mm MR-420R-A MR-420R-A(NZ) - 8 - PLUG CORD LENGTH REQUIRED SPACE FOR INSTALLATION 20 685 20 1334 454 40 100 1696 700 1950 568 685 8 1696 1047 73[...]

  • Page 10

    Unit : mm MR-455R-A MR-455R-A(NZ) - 9 - PLUG CORD LENGTH REQUIRED SPACE FOR INSTALLATION 20 685 20 1334 454 40 100 1806 700 1950 568 685 8 1806 1157 73[...]

  • Page 11

    (SKELETON WIRING DIAGRAM) MR-385R-A MR-385R-A(NZ) MR-420R-A MR-420R-A(NZ) MR-455R-A MR-455R-A(NZ) (ACTUAL WIRING DIAGRAM) 3 WIRING DIAGRAM - 10 -[...]

  • Page 12

    MR-385R-A MR-420R-A MR-385R-A(NZ) MR-420R-A(NZ) - 11 - 4 REFRIGERANT CIRCUIT[...]

  • Page 13

    MR-455R-A MR-455R-A(NZ) - 12 -[...]

  • Page 14

    MR-385R-A MR-385R-A(NZ) MR-420R-A MR-420R-A(NZ) MR-455R-A MR-455R-A(NZ) - 13 - 5 NAME OF PARTS[...]

  • Page 15

    6.1 TROUBLE CRITERION OF MAIN PARTS MR-385R-A MR-420R-A MR-455R-A MR-385R-A(NZ) MR-420R-A(NZ) MR-455R-A(NZ) Compressor Measure the resistance with a tester. (Ambient temperature:Room temperature 15 o C ~ 25 o C) In the control panel of the Measure the resistance with a tester. refrigerator compartment Model Measure the resistance with a tester.(Amb[...]

  • Page 16

    Fan grill of the freezer compartment. Measure the resistance with a tester. (Ambient temperature:Room temperature 15 o C ~ 25 o C) In the drip tray under the evaporator of the freezer compartment Measure the resistance with a tester. (Ambient temperature:Room temperature 15 o C ~ 25 o C) Resistance measured under Defrost thermistors the ambient tem[...]

  • Page 17

    6.2 HOW TO CHECK P.C BOARDS MR-385R-A MR-420R-A MR-455R-A MR-385R-A(NZ) MR-420R-A(NZ) MR-455R-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. The following cares must be taken when servicing.[...]

  • Page 18

    6.3 TEST POINT DIAGRAM OF MAIN CONTROL BOARD MR-385R-A MR-420R-A MR-455R-A MR-385R-A(NZ) MR-420R-A(NZ) MR-455R-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 6.4.3 ) Repairing and check point * A the case below , if the analysis result has malfunction over 2 points and will express in the list has more importance. Function display Cause Analysis result Check point Corrective[...]

  • Page 20

    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 pleas e[...]

  • Page 21

    MR-385R-A MR-420R-A MR-455R-A MR-385R-A(NZ) MR-420R-A(NZ) MR-455R-A(NZ) Unplug the power cord before prepairing and servicing 1. Remove parts insider the Freezer room (1) Photo 1st Remove Crystal shelf Freezer, Fan Grille (2) Photo 2nd Remove scews for closing Lead cover F, Remove 2 Rivets From Fan grille (3) Photo 3rd Cut binder, remove poly bag, [...]

  • Page 22

    2. Remove parts inside the refrigerator (1) Remove chilled case door and slide chilled case , remove crystal shelf of refrigerator room , remove the control panel (Photo 6) (2) Remove lamp cover R (Photo 6) (3) Remove screw and rivet , pull the control panel with to right refrigerator wall. (Photo 6) (4) Pick the aluminium tape and sealing tape, re[...]

  • Page 23

    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. (The dryer should be the one [...]

  • Page 24

    DOOR, BODY PARTS MR-385R-A MR-385R-A(NZ) MR-420R-A MR-420R-A(NZ) MR-455R-A MR-455R-A(NZ) - 23 - 8 PARTS LIST 1 2 3 4 5 6 10 9 11 7 8 1 2 4 5 10 9 11 8 7 6 3[...]

  • Page 25

    WS TWS TWS TWS TWS TWS T 1 KIEJ62131 FREEZER POCKET 222222222222 2 KIE401115 EGG RACK 222222222222 3 KIEJ62118 FREE POCKET 111111111111 4 KIEJ62159 ADJUST POCKET 222222223333 5 KIEJ62124 BOTTLE POCKET 222222222222 6 KIEH88143 BOTTLE STOPPER 111111111111 KIEJ81001 111111 KIEJ82001 111111 8 KIEH79111 MAGNET GASKET ASSY (F) 111111111111 KIEJ81000 1 1 [...]

  • Page 26

    ACCESSORY PARTS MR-385R-A MR-385R-A(NZ) MR-420R-A MR-420R-A(NZ) MR-455R-A MR-455R-A(NZ) - 25 - 1 2 3 4 5 6 7 17 18 22 23 25 9 8 10 11 12 13 30 22 31 27 26 14 15 19 20 21 24 29 28 1 2 3 4 6 7 8 10 12 13 14 15 29 30 31 28 22 27 26 25 24 23 22 21 20 19 18 17 11 9 5 16 16[...]

  • Page 27

    WS TWS TWS TWS TWS TWS T 1 KIEH79662 BELL MOUTH 111111111111 2 KIEJ81473 LAMP COVER (F) 111111111111 3 KIEH79663 FAN GRILLE 111111111111 4 KIEH79450 ICE CORNER ASSY 111111111111 K I E H 7 9 6 6 5 1111 K I E H 8 2 6 6 5 1111 K I E H 8 5 6 6 5 1111 6 KIEH79411 SLIDE CHILLED CASE 111111111111 7 KIEJ81850 CONTROL PANEL 111111111111 K I E H 7 9 3 0 5 11[...]

  • Page 28

    ELECTRICIAL PARTS AND UNIT PARTS MR-385R-A MR-385R-A(NZ) MR-420R-A MR-420R-A(NZ) MR-455R-A MR-455R-A(NZ) - 27 - 1 2 4 3 5 6 9 7 10 8 11 13 12 14 15 16 15 17 18 20 19 27 21 22 23 24 26 25 28 30 29 31[...]

  • Page 29

    WS TWS TWS T WS TWS TWS T 1 KIEH79336 THERMAL FUSE ( DEF ) 111111111111 2 KIEH85995 EVAPORATOR 111111111111 3 KIEH79537 HEATER ROOF 111111111111 4 KIEHM2392 DEFROST HEATER ASSY 240V, 150W NOT DEODORIZER 111111111111 5 KIEB66397 HEATER COVER 111111111111 6 KIE402360 LAMP E17 240V I5W 111111111111 7 KIEH79538 DRIP TRAY 111111111111 8 KIEH79301 DAMPER[...]

  • Page 30

    PACKING PART MR-385R-A MR-385R-A(NZ) MR-420R-A MR-420R-A(NZ) MR-455R-A MR-455R-A(NZ) - 29 - NO STEP ON 1 2 3 L R 1 C.F.B BOX ASSY 8 C.F.B TOP COVER 5 SIDE CUSHION ASSY 4 PACKING COVER 7 C.F.B PALLET 6 BOTTOM CUSHION 3 TOP CUSHION MID 2 TOP CUSHION REFRIGERATOR[...]

  • Page 31

    WS TWS TWS TWS TWS TWS T KIEJ81970 1 KIEJ82970 1 KIEJ83970 1 KIEJ84970 1 KIEJ85970 1 KIEJ86970 1 KIEJL4970 1 KIEJL5970 1 KIEJL6970 1 KIEJL7970 1 KIEJL8970 1 KIEJL9970 1 2 KIEJ81979 TOP CUSHION 111111111111 3 KIEH79972 TOP CUSHION MID 111111111111 4 KIEG55973 PACKING COVER 111111111111 5 KIEJ81971 SIDE CUSHION ASSY 111111111111 6 KIEH79978 BOTTOM CU[...]

  • Page 32

    MITSUBISHI ELECTRIC CORPORATATION HEAD OFFICE : MITSUBISHI DENKI BLDG., MARUNOUCHI,TOKYO 100. TELEX : J24532 CABLE MELCO TOKYO Distributed by BLACK DIAMOND TECHNOLOGIES LIMITED (BDT) Wellington Office (Head Office) Auckland Office Christchurch Office 1 Parliament Street Unit1, 4 Walls Road Suite 2, Level 1 PO Box 30-772 Penrose 37 Manderville Stree[...]