MITSUBISHI HOME REFRIGERATORS 2005 SERVICE MANUAL NO.SM-RE-0502 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 MR-385R-W-A(NZ) MR-385R-ST-A(NZ) MR-420R-W-A(NZ) MR-420R-ST-A(NZ) MR-455R-W-A(NZ) MR-455R-ST-A(NZ) CONTENTS A……......Australia A(NZ) .....New Zealand 1. SPECIFICATIONS.................................................... 2. OUTLINES AND DIMENSIONS.................................. 3. WIRING DIAGRAM.................................................... 4.
1 SPECIFICATION 1.
MR-420R-A MR-420R-A(NZ) Power supply Total capacity (Gross (AS)) Dimensions (HXWXD) Cabinet Food liner Cabinet Insulation Freezer door Refrigerator door Cooling system Freezer Refrigerator Evaporator Condenser Defrost system Drain Temperature control system Refrigerator room light Ice tray Ice box Freezer pocket Slide chilled case 230/240V 50Hz 420 (F : 130 R : 290) 1696 x 685 x 700 Acrylic resin coated steel ABS resin Foamed cyclopenthane Foamed cyclopenthane Foamed cyclopenthane Forced air convection Sur
MR-455R-A MR-455R-A(NZ) Power supply Total capacity (Gross (AS)) Dimensions (HXWXD) Cabinet Food liner Cabinet Insulation Freezer door Refrigerator door Cooling system Freezer Refrigerator Evaporator Condenser Defrost system Drain Temperature control system Refrigerator room light Ice tray Ice box Freezer pocket Slide chilled case 230/240V 50Hz 454 (F : 130 R : 324) 1806 x 685 x 700 Acrylic resin coated steel ABS resin Foamed cyclopenthane Foamed cyclopenthane Foamed cyclopenthane Forced air convection Sur
1.2 ELECTRICAL PARTS SPECIFICATION MR-385R-A MR-385R-A(NZ) DG57C96RAW5 220/240V 50Hz Model Power supply Compressor Rated input W 106/108(220/240V 50Hz) Starting current A 7.38/8.01(220/240V 50Hz) Running current A 0.57/0.55(220/240V 50Hz) Winding resistance (T : 20 oC) 18.2 Ω(Main) / 17.7 Ω(Aux) PTH7M330MD2 PTC RELAY 5TM181NHBYY Model Motor protector o Ambient temperature Time C Sec. Current A 25 16 MAX 5.4 4µF 400VAC Running capacitor 1.8 X ∅ 0.7 X 2350 Capillary tube mm.
MR-420R-A MR-420R-A(NZ) DG66C11RAW5 220/240V 50Hz Model Power supply Compressor Rated input W 117/118(220/240V 50Hz) Starting current A 8.05/8.83(220/240V 50Hz) Running current A 0.71/0.66(220/240V 50Hz) Winding resistance (T : 20 oC) 15.4 Ω(Main) / 17.7 Ω(Aux) PTH7M330MD2 PTC RELAY 5TM205NHBYY Model Motor protector o Ambient temperature Time C Sec. Current A 25 16 MAX 6.0 4µF 400VAC Running capacitor 1.8 X ∅ 0.7 X 2350 Capillary tube mm.
MR-455R-A MR-455R-A(NZ) DD66C13RAW5 220/240V 50Hz Model Power supply Compressor Rated input W 127/131(220/240V 50Hz) Starting current A 8.3/9.1(220/240V 50Hz) Running current A 0.63/0.61(220/240V 50Hz) Winding resistance (T : 20 oC) 12 Ω(Main) / 28.7 Ω(Aux) PTH7M330MD2 PTC RELAY 5TM205NHBYY Model Motor protector o Ambient temperature Time C Sec. Current A 25 16 MAX 6.0 4µF 400VAC Running capacitor 1.8 X ∅ 0.7 X 2350 Capillary tube mm.
OUTLINES AND DIMENSIONS 1591 8 568 942 1950 PLUG CORD LENGTH REQUIRED SPACE FOR INSTALLATION 40 685 20 1334 100 20 1591 MR-385R-A MR-385R-A(NZ) Unit : mm 685 73 2 454 700 -7-
1696 8 568 1047 73 1950 PLUG CORD LENGTH REQUIRED SPACE FOR INSTALLATION 40 685 20 1334 100 20 1696 MR-420R-A MR-420R-A(NZ) Unit : mm 685 700 -8- 454
1157 1806 8 568 685 73 1950 PLUG CORD LENGTH REQUIRED SPACE FOR INSTALLATION 40 685 20 1334 100 20 1806 MR-455R-A MR-455R-A(NZ) Unit : mm 700 -9- 454
3 WIRING DIAGRAM MR-385R-A MR-385R-A(NZ) MR-420R-A MR-420R-A(NZ) MR-455R-A MR-455R-A(NZ) (SKELETON WIRING DIAGRAM) (ACTUAL WIRING DIAGRAM) - 10 -
4 REFRIGERANT CIRCUIT MR-385R-A MR-420R-A MR-385R-A(NZ) MR-420R-A(NZ) - 11 -
MR-455R-A MR-455R-A(NZ) - 12 -
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 -
6 TROUBLE SHOOTING 6.1 TROUBLE CRITERION OF MAIN PARTS MR-385R-A MR-385R-A(NZ) MR-420R-A MR-455R-A MR-420R-A(NZ) MR-455R-A(NZ) Components/ Part Name Parts Mounted Position Check Method and Criterion Compressor Model Rated input Starting current Running current MR-385R MR-420R,455R Compressor in DG57C96RAW5 DG66C11RAW5 the machine W 106/108(220/240V 50Hz) 117/118(220/240V 50Hz) chamber at the A 7.38/8.01(220/240V 50Hz) 8.05/8.83(220/240V 50Hz) A 0.57/0.55(220/240V 50Hz) 0.71/0.
Components/ Part Name Check Method and Criterion Parts Mounted Position Fan grill of the freezer compartment. UDVH15MA1H Model Measure the resistance with a tester. Refrigerator fan motor (Ambient temperature:Room temperature 15oC ~ 25oC) Normal abnormal(faulty) 560+ 10% ( Ω ) Short (0Ω) Rated input 150 W operation method Power ON after defrosting o (14 + 1.5 C or more) Measure the resistance with a tester.
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.
6.
- 18 - LED display self - check Cycle 5 Sec. 1 time 2 times Cycle 5 Sec. 1 time 2 times 3 times Fault trouble of defrost heater 2 times Fault trouble of defrost thermistor 1 time Fault trouble of freezer thermistor 5 Sec. Defrost unfinished with in 2 hours 2. The consider short circuit or open circuit of thermistor , resistance of open circuit is ∞ Ω Change part 3. Check the resistance of temp. fuse , resistance of short circuit is 0 Ω Change part Improve in contact 2.
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 .
7 DISASSEMBLY INSTRUCTIONS 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 OPERATION PROCEDURE PHOTO Photo 1 1.
OPERATION PROCEDURE PHOTO Photo 6 2. Remove parts inside the refrigerator (1) Remove chilled case door and slide chilled case , Control panel remove crystal shelf of refrigerator room , remove the control panel Thermo dial R (Photo 6) (2) Remove lamp cover R Lamp cover R (Photo 6) (3) Remove screw and rivet , pull the control panel with to right refrigerator wall.
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. (The dryer should be the one packed with the compressor.) CAUTION ON ASSEMBLY After replacement check cooling operation and check the weld for gas leaking.
8 PARTS LIST DOOR, BODY PARTS MR-385R-A MR-385R-A(NZ) MR-420R-A MR-420R-A(NZ) 7 8 1 11 2 3 4 9 5 10 6 MR-455R-A MR-455R-A(NZ) 7 8 1 11 2 3 4 9 10 5 6 - 23 -
NO. PART NO.
ACCESSORY PARTS MR-385R-A MR-385R-A(NZ) MR-420R-A MR-420R-A(NZ) 16 17 18 1 2 3 19 20 21 22 4 23 24 5 6 7 8 9 10 11 12 13 14 15 25 26 27 22 28 31 29 MR-455R-A MR-455R-A(NZ) 16 30 17 18 19 20 21 22 1 2 3 4 5 6 7 8 9 10 23 24 25 26 11 12 13 14 27 22 28 31 15 29 - 25 - 30
Q'TY/UNIT NO. PART NO.
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) 1 12 31 13 14 15 16 17 15 18 19 20 21 22 23 24 2 3 4 5 6 7 8 25 30 26 9 27 10 11 28 29 - 27 -
Q'TY/UNIT NO. PART NO.
PACKING PART MR-385R-A MR-420R-A MR-455R-A MR-385R-A(NZ) MR-420R-A(NZ) MR-455R-A(NZ) 3 TOP CUSHION MID 1 2 NO STEP ON 3 8 C.F.B TOP COVER 1 C.F.B BOX ASSY R L 2 TOP CUSHION 5 SIDE CUSHION ASSY REFRIGERATOR 4 PACKING COVER 6 BOTTOM CUSHION 7 C.F.
NO. PART NO. PART NAME KIEJ81970 SPEC Q'TY/UNIT 455R 385R 420R PRICE A A(NZ) A A(NZ) A(NZ) A W ST W ST W ST W ST W ST W ST 1 KIEJ82970 1 KIEJ83970 1 KIEJ84970 1 KIEJ85970 1 KIEJ86970 KIEJL4970 1 1 C.F.B BOX ASSY 1 KIEJL5970 1 KIEJL6970 1 KIEJL7970 1 KIEJL8970 1 KIEJL9970 2 3 4 5 6 7 8 KIEJ81979 KIEH79972 KIEG55973 KIEJ81971 KIEH79978 KIEH79974 KIEH79975 1 TOP CUSHION TOP CUSHION MID PACKING COVER SIDE CUSHION ASSY BOTTOM CUSHION C.F.B PALLET C.F.
MITSUBISHI ELECTRIC CORPORATATION HEAD OFFICE : MITSUBISHI DENKI BLDG., MARUNOUCHI,TOKYO 100.