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MITSUBISHI
HOME REFRIGERATORS
2005
NO.SM-RE-0502
SERVICE MANUAL
MR-385R-W-A
Models MR-385R-W-A(NZ)
MR-385R-ST-A
MR-385R-ST-A(NZ)
MR-420R-W-A
MR-420R-W-A(NZ)
MR-420R-ST-A
MR-420R-ST-A(NZ)
MR-455R-W-A
MR-455R-W-A(NZ)
MR-455R-ST-A
MR-455R-ST-A(NZ)
CONTENTS
1. SPECIFICATIONS.................................................... 1
2. OUTLINES AND DIMENSIONS.................................. 7
3. WIRING DIAGRAM.................................................... 10
4. REFRIGERANT CIRCUIT..............
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1 SPECIFICATION 1.1 SPECIFICATION MR-385R-A MR-385R-A(NZ) Power supply 230/240V 50Hz Total capacity (Gross (AS)) L 385 (F : 130 R : 255) Dimensions (HXWXD) mm. 1591 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 Freezer Forced air convection Refrigerator Surround cooling,multi air flow,front air flow Evaporator Fin and tube type Conde
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MR-420R-A MR-420R-A(NZ) Power supply 230/240V 50Hz Total capacity (Gross (AS)) L 420 (F : 130 R : 290) Dimensions (HXWXD) mm. 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 Freezer Forced air convection Refrigerator Surround cooling,multi air flow,front air flow Evaporator Fin and tube type Condenser Concealed type Defrost sys
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MR-455R-A MR-455R-A(NZ) Power supply 230/240V 50Hz 454 (F : 130 R : 324) 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 Insulation Freezer door Foamed cyclopenthane Refrigerator door Foamed cyclopenthane Cooling system Freezer Forced air convection Refrigerator Surround cooling,multi air flow,front air flow Evaporator Fin and tube type Condenser Concealed type Defrost sys
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1.2 ELECTRICAL PARTS SPECIFICATION MR-385R-A MR-385R-A(NZ) DG57C96RAW5 Model 220/240V 50Hz Power supply Compressor Rated input W 106/108(220/240V 50Hz) 7.38/8.01(220/240V 50Hz) Starting current A 0.57/0.55(220/240V 50Hz) Running current A o 18.2 Ω (Main) / 17.7 Ω (Aux) Winding resistance (T : 20 C) PTH7M330MD2 PTC RELAY 5TM181NHBYY Model o Motor protector Ambient temperature 25 C 16 MAX Time Sec. 5.4 Current A Running capacitor 4µF 400VAC ∅ 1.8 X ∅ 0.7 X 2350 Capillar
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MR-420R-A MR-420R-A(NZ) DG66C11RAW5 Model 220/240V 50Hz Power supply Compressor Rated input W 117/118(220/240V 50Hz) 8.05/8.83(220/240V 50Hz) Starting current A 0.71/0.66(220/240V 50Hz) Running current A o 15.4 Ω (Main) / 17.7 Ω (Aux) Winding resistance (T : 20 C) PTH7M330MD2 PTC RELAY 5TM205NHBYY Model o Motor protector Ambient temperature 25 C 16 MAX Time Sec. 6.0 Current A Running capacitor 4µF 400VAC ∅ 1.8 X ∅ 0.7 X 2350 Capillary tube mm. 10 Dehydrant Molecul
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MR-455R-A MR-455R-A(NZ) DD66C13RAW5 Model 220/240V 50Hz Power supply Compressor Rated input W 127/131(220/240V 50Hz) Starting current A 8.3/9.1(220/240V 50Hz) 0.63/0.61(220/240V 50Hz) Running current A o 12 Ω (Main) / 28.7 Ω (Aux) Winding resistance (T : 20 C) PTC RELAY PTH7M330MD2 5TM205NHBYY Model o Motor protector Ambient temperature 25 C Time Sec. 16 MAX 6.0 Current A Running capacitor 4µF 400VAC ∅ 1.8 X ∅ 0.7 X 2350 Capillary tube mm. 10 Dehydrant Molecular sie
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2 OUTLINES AND DIMENSIONS Unit : mm 685 MR-385R-A MR-385R-A(NZ) PLUG CORD LENGTH REQUIRED SPACE FOR INSTALLATION 40 685 20 20 454 700 - 7 - 73 942 568 1591 8 1591 100 1950 1334
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Unit : mm 685 MR-420R-A MR-420R-A(NZ) PLUG CORD LENGTH REQUIRED SPACE FOR INSTALLATION 40 685 20 20 454 700 - 8 - 73 1047 568 1696 8 100 1696 1950 1334
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Unit : mm MR-455R-A 685 MR-455R-A(NZ) PLUG CORD LENGTH REQUIRED SPACE FOR INSTALLATION 40 685 20 20 454 700 - 9 - 73 1157 568 1806 8 100 1806 1950 1334
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3 WIRING DIAGRAM (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) - 10 -
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4 REFRIGERANT CIRCUIT MR-385R-A MR-420R-A MR-385R-A(NZ) MR-420R-A(NZ) - 11 -
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MR-455R-A MR-455R-A(NZ) - 12 -
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5 NAME OF PARTS MR-385R-A MR-385R-A(NZ) MR-420R-A MR-420R-A(NZ) MR-455R-A MR-455R-A(NZ) - 13 -
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6 TROUBLE SHOOTING 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) Components/ Parts Mounted Check Method and Criterion Part Name Position Compressor MR-385R MR-420R,455R Compressor in Model DG57C96RAW5 DG66C11RAW5 the machine Rated input W 106/108(220/240V 50Hz) 117/118(220/240V 50Hz) chamber at the Starting current A 7.38/8.01(220/240V 50Hz) 8.05/8.83(220/240V 50Hz) rear side of Running current A 0.57/0.55(220/240V 50Hz) 0.71/0.66(22
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Components/ Parts Mounted Position Check Method and Criterion Part Name Fan grill of the freezer compartment. Model UDVH15MA1H Measure the resistance with a tester. Refrigerator o o (Ambient temperature:Room temperature 15 C ~ 25 C) fan motor Normal abnormal(faulty) 560+ 10% ( Ω ) Short (0Ω ) Rated input 150 W In the drip tray under Power ON after defrosting the evaporator of the operation method o (14 + 1.5 C or more) freezer compartment Measure the resistance with a tester. Defrost o o He
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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. 1. Be sure to unplug the power cord before servicing. 2. Wipe away droplets on the control board box with dry cloth, a
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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 -
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Ω Ω - 18 - 6.4 Malfunction Display and Checking points. 6.4.1 ) Malfunction display will use LED for show self-check 6.4.2 ) Fucntion display 1 time 2 times 1 time 2 times 1 time 2 times 1 time 2 times 5 Sec. 5 Sec. 5 Sec. 5 Sec. ON OFF Cycle Cycle Cycle Cycle 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 Priority Repairing
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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 . "CONTROL PANEL" Refrigerator plug No connect? Yes Connect power plug LED show shelf - check Self - check No Mal Function
