Mitsubishi Electric MR-385S-W-A User manual

Changes for the Better
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
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 HOW TO CHECK P.C.BOARDS......................
6.3 TEST POINT DIAGRAM OF
MAIN CONTROL BOARD..............................
6.4 MULFUNCTION DISPLAY AND CHECKING
POINT...........................................................
6.5 IMPORTANCE DETAIL OF FAULT ANALYSIS.
7. DISASSEMBLY INSTRUCTIONS.................................
8. PARTS LIST...............................................................
1
7
10
11
13
14
14
16
17
18
19
20
23
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)
A……......Australia
A(NZ) .....New Zealand
2006
SERVICE MANUAL
NO.SM-RE-0604
MITSUBISHI
ELECTRIC
HOME REFRIGERATORS

1.1 SPECIFICATIONS
MR-385S-A MR-385SL-A
MR-385S-A(NZ) MR-385SL-A
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
Refrigerator Surround cooling,multi air flow,front air flow
Evaporator Fin and tube type
Condenser Concealed type
Defrost system Automatic (Heater defrost)
Drain Automatic (drainage)
Temperature control system Automatic control
Refrigerator room light 240V 15W (E12)
Ice tray 1 pc.
Ice box 1 pc.
Freezer pocket 2 pcs.
Slide chilled case 1 pc.
Crystal shelf (F) 1 pc.
Crystal shelf (R) 3 pcs.
Free pocket 1 pc.
Egg rack 2 pcs.
Adjust pocket 2 pcs.
Bottle pocket 2 pcs.
Vegetable case 1 pc.
Tray V 1 pc.
Drain pan 1 pc.
Bottle stopper 1 pc.
Weight Unit kg 70
Shipping kg 76
- 1 -
Insulation
Accessories
385 (F : 130 R : 255)
1 SPECIFICATIONS

MR-420S-A
MR-420S-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 cooling,multi air flow,front air flow
Evaporator Fin and tube type
Condenser Concealed type
Defrost system Automatic (Heater defrost)
Drain Automatic (drainage)
Temperature control system Automatic control
Refrigerator room light 240V 15W (E12)
Ice tray 1 pc.
Ice box 1 pc.
Freezer pocket 2 pcs.
Slide chilled case 1 pc.
Crystal shelf (F) 1 pc.
Crystal shelf (R) 3 pcs.
Free pocket 1 pc.
Egg rack 2 pcs.
Adjust pocket 2 pcs.
Bottle pocket 2 pcs.
Vegetable case 1 pc.
Tray V 1 pc.
Drain pan 1 pc.
Bottle stopper 1 pc.
Weight Unit kg 74
Shipping kg 81
- 2 -
Insulation
Accessories
420 (F : 130 R : 290)

MR-455S-A
MR-455S-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 cooling,multi air flow,front air flow
Evaporator Fin and tube type
Condenser Concealed type
Defrost system Automatic (Heater defrost)
Drain Automatic (drainage)
Temperature control system Automatic control
Refrigerator room light 240V 15W (E12)
Ice tray 2 pcs.
Ice box 1 pc.
Freezer pocket 2 pcs.
Slide chilled case 1 pc.
Crystal shelf (F) 1 pc.
Crystal shelf (R) 4 pcs.
Free pocket 1 pc.
Egg rack 2 pcs.
Adjust pocket 3 pcs.
Bottle pocket 2 pcs.
Vegetable case 1 pc.
Tray V 1 pc.
Drain pan 1 pc.
Bottle stopper 1 pc.
Weight Unit kg 78
Shipping kg 86
- 3 -
Insulation
Accessories
454 (F : 130 R : 324)

1.2 ELECTRICAL PARTS SPECIFICATION
MR-385S-A MR-385SL-A
MR-385S-A(NZ) MR-385SL-A
Model
Power supply
Compressor Rated input W
Starting current A
Running current A
Winding resistance (A.T. : 20 oC)
PTC RELAY
Model
Motor protector Ambient temperature oC
Time Sec.
Current A
Running capacitor
Capillary tube mm.
Dehydrant Molecular sieve g
Refrigerant HFC. 134a g
Defrosting control Defrosting timer
Defrost finish oC
Thermal fuse oC
Heater Defrost heater
Deodorition
Model
Type
Number of poles
Input W
Revolution r.p.m
Model Freezer Refrigerator (MM1-6177)
Dial position ON OFF OPEN SHUT
Warmer oC-13.7 -19.0 - 3.5
Normal oC-16.9 -22.9 MAX 5.0 -1.0 + 1.5
Colder oC-20.4 -27.5 - -12.5
Fan motor
Temperature control
- 4 -
DG57C96RAW5
106/108(220/240V 50Hz)
7.38/8.01(220/240V 50Hz)
0.57/0.55(220/240V 50Hz)
18.2 Ω(Main) / 17.7 Ω(Aux)
PTH7M330MD2
5TM181NHBYY
Less than 10.2/12 (220/240V 50Hz)
2520 + 200 / 2580+200 (220/240V 50Hz)
2p
25
16 MAX
5.4
4µF 400VAC
Single phase
∅1.8 X ∅0.7 X 2350
10
384 Ω(240V 150W)
Filter
220/240V 50Hz
UDVH15MA1H
145
Control board
Thermister 14 + 1.5
73

MR-420S-A
MR-420S-A(NZ)
Model
Power supply
Compressor Rated input W
Starting current A
Running current A
Winding resistance (A.T. : 20 oC)
PTC RELAY
Model
Motor protector Ambient temperature oC
Time Sec.
Current A
Running capacitor
Capillary tube mm.
Dehydrant Molecular sieve g
Refrigerant HFC. 134a g
Defrosting control Defrosting timer
Defrost finish oC
Thermal fuse oC
Heater Defrost heater
Deodorition
Model
Type
Number of poles
Input W
Revolution r.p.m
Model Freezer Refrigerator (MM1-6177)
Dial position ON OFF OPEN SHUT
Warmer oC-13.7 -19.0 - 3.5
Normal oC-16.9 -22.9 MAX 5.0 -1.0 + 1.5
Colder oC-20.4 -27.5 - -12.5
Fan motor
Temperature control
- 5 -
DG66C11RAW5
117/118(220/240V 50Hz)
8.05/8.83(220/240V 50Hz)
0.71/0.66(220/240V 50Hz)
15.4 Ω(Main) / 17.7 Ω(Aux)
PTH7M330MD2
5TM205NHBYY
Less than 10.2/12 (220/240V 50Hz)
2520 + 200 / 2580+200 (220/240V 50Hz)
2p
25
16 MAX
6.0
4µF 400VAC
Single phase
∅1.8 X ∅0.7 X 2350
10
384 Ω(240V 150W)
Filter
220/240V 50Hz
UDVH15MA1H
145
Control board
Thermister 14 + 1.5
73

MR-455S-A
MR-455S-A(NZ)
Model
Power supply
Compressor Rated input W
Starting current A
Running current A
Winding resistance (A.T. : 20 oC)
PTC RELAY
Model
Motor protector Ambient temperature oC
Time Sec.
Current A
Running capacitor
Capillary tube mm.
Dehydrant Molecular sieve g
Refrigerant HFC. 134a g
Defrosting control Defrosting timer
Defrost finish oC
Thermal fuse oC
Heater Defrost heater
Deodorition
Model
Type
Number of poles
Input W
Revolution r.p.m
Model Freezer Refrigerator (MM1-6177)
Dial position ON OFF OPEN SHUT
Warmer oC-13.7 -19.0 - 3.5
Normal oC-16.9 -22.9 MAX 5.0 -1.0 + 1.5
Colder oC-20.4 -27.5 - -12.5
Temperature control
- 6 -
Less than 10.2/12 (220/240V 50Hz)
2520 + 200 / 2580+200 (220/240V 50Hz)
DD66C13RAW5
127/131(220/240V 50Hz)
8.3/9.1(220/240V 50Hz)
Fan motor
UDVH15MA1H
Single phase
2p
4µF 400VAC
0.63/0.61(220/240V 50Hz)
12 Ω(Main) / 28.7 Ω(Aux)
Filter
∅1.8 X ∅0.7 X 2350
10
145
Control board
384 Ω(240V, 150W)
220/240V 50Hz
Thermister 14 + 1.5
73
25
16 MAX
6.0
PTH7M330MD2
5TM205NHBYY

Unit : mm
MR-385S-A
MR-385S-A(NZ)
MR-385SL-A
MR-385SL-A(NZ)
- 7 -
2 OUTLINES AND DIMENSIONS
20
685
20
1334
454
50
100
1591
700
REQUIRED SPACE FOR INSTALLATION
1950
PLUG CORD LENGTH
568
685
81591
942
73

Unit : mm
MR-420S-A
MR-420S-A(NZ)
- 8 -
PLUG CORD LENGTH
REQUIRED SPACE FOR INSTALLATION
20685
20
1334
454
50
100
1696
700
1950
568
685
81696
1047
73

Unit : mm
MR-455S-A
MR-455S-A(NZ)
- 9 -
PLUG CORD LENGTH
REQUIRED SPACE FOR INSTALLATION
20685
20
1334
454
50
100
1806
700
1950
568
685
81806
1157
73