Panasonic NR-B420M User manual

Service Manual
ORDER NO. TRD0307001C3
NR-B570D
MODELS:
NR-B420M/MS/MW, B480M/MS/MW, B570M/MS/MW/D, B53D2,
B643M/MS/MW/D, B703M/MS/MW, C603D, C703M/MS/MW/D
CFCs have been used in refrigerator as refrigerant and the insulation materials for many years.
But it is now known that these compounds which once seemed so ideal for use as cleaning
agents and in refrigeration systems, destroy the earth's ozone layer. As a result, an
international body decided on a total worldwide ban of harmful CFCs by the end 1995.
EXPLANATION OF COLOUR CODE
The suffix of model number shows the colour
of that unit as in the following table.
Suffix Colour
STITANIUM SILVER
WWHITE
CONTENTS Page
SECTION I TROUBLE SHOOTING GUIDE ..............2
SECTION II SPECIFICATIONS & COMPONENTS ....6
SECTION III SCHEMATIC DIAGRAMS ....................11
SECTION IV DISASSEMBLY INSTRUCTION............12
SECTION V PARTS LOCATION................................16
SECTION VI REPLACEMENT PARTS LIST ..............24
@@@@@@@@e?
@@@@@@@@e?
@@h?
@@h?
@@h?
@@h?
@@h?
@@h?
@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e
@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e
@@@@@@@@
@@@@@@@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
?@@
?@@
?@@
?@@
?@@
?@@
?@@@@@@@@
?@@@@@@@@
?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@
?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@e?@@@@@@@@?e@@@@@@@@
@@g
@@g
@@g
@@g
@@g
@@g
@@@@@@@@
@@@@@@@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
@@
2003 Matsushita Electric Industrial Co., Ltd.
All rights reserved. Unauthorized copying and distribution is a
violation of law.

---- 2 ----
B420M/MS/MW, B480M/MS/MW,
B570M/MS/MW/D/D-*9, B53D2,
B643M/MS/MW/D/D-*9, B703M/MS/MW,
C603D, C703M/MS/MW/D
SECTION I TROUBLE SHOOTING GUIDE
Symptom 1. No cooling at all.
Compressor does not operate.
(No compressor motor operation noise.)
Does light inside
refrigerator light up?
Does compressor
operate when thermostat
is short circuited?
Does compressor
operate when
timer is set to colling
operation side?
YES
NO
NO
NO
Ye s
Power breaker OFF.
Power cord
disconnected.
Broken wire in
power cord.
Reset power
breaker.
Plug in power
cord.
Replace power
cord.
Thermostat gas leak. Rèplace
thermostat.
Faulty thermostat
contacts.
Replace
thermostat.
Ye s
Blown temperature fuse
Replace bimetal
thermostat and
temperature fuse
Defrost heater broken
Replace
defrost heater.
Faulty timer contacts
Replace timer
(Disconnect two joints of both ends of fuse
and check continuity between sky blue and
brown joint.)
(Disconnect timer wires and check continuity between yellow
green (3) and gray (4) terminals of timer. Fig. 1)
Faulty overload
protector contacts
Replace
overload relay
(Short circuit wires and of the overload protector; it the
compressor operates, the overload protector is faulty. Fig. 2)
Fig. 1
Fig. 2
Continuity
check
Ohm meter

---- 3 ----
B420M/MS/MW, B480M/MS/MW,
B570M/MS/MW/D/D-*9, B53D2,
B643M/MS/MW/D/D-*9, B703M/MS/MW,
C603D, C703M/MS/MW/D
Compressor does not operate.
(There is operation noise. but overload protector functions
and compressor stops; this occurs repeatedly.)
Is power supply voltage
within ± 10% of rated
voltage at start of
operation?
YES
NO
NO
Multiple connections
to same
electrical outlet?
Insufficient capacity
of room wiring.
Connect refrigerator
separately.
Is resistance of relay
approx. 33Ω?
Short circuit (0 Ω)
or Open circuit (∞Ω)
Replace
contactless relay
NO
Is running capacitor
OK? Short circuit (0 Ω)Replace running
capacitor
NO
Main coil broken.
or Auxiliary coil broken.
Replace
compressor.
Increase capacity
of room wiring.
YES
Is compressor coil
continuity OK?
Fig. 4
YES
Compressor locked. Replace
compressor.
Compressor motor
burned out.
Replace
compressor.
YES
(Resistances in both main and auxiliary coils
normal.)
(Motor coil resistance low.)
Compressor operate.
(Condenser temperature is low.)
Complete gas leakage.
Complete choke.
Faulty compression.
Fig. 3
Fig. 4
Auxiliary Main

---- 4 ----
B420M/MS/MW, B480M/MS/MW,
B570M/MS/MW/D/D-*9, B53D2,
B643M/MS/MW/D/D-*9, B703M/MS/MW,
C603D, C703M/MS/MW/D
Measure temperature in freezer and
refrigerator compartments.
At center of freezer:
approx. -15°C
At center of refrigerator:
approx. 4°C
Dial settings: C/MED
Check operation of cooling fan motor.
Check frost of evaporator.
Symptom 2. Poor cooling
Compressor operates
Note 1: If the temperature fuse blows or defrost heater is broken, the timer will
stop with the timer contacts (C-NO) ON, thus preventing the resumption
of cooling operation.
Consequently, there will be no cooling at all of the refrigerator.
Temperature high in both
refrigerator and freezer
compartments.
Operates
Check the setting of the
COLD AIR CONTROL.
Check the setting of the
COLD AIR CONTROL.
Check door switch
continuity
Poor cooling at
Freezer only.
Poor cooling
at refrigerator only.
Check position of timer cam.
(A) 1 st contact noise: defrosting contact (C-NO) ON.
(B) 2 nd contact noise: cooling contact (C-NC) ON.
(A) defrosting position
Condition B
Condition A
Too much frost.
Frost at upper only.
Frost at bottom only.
Not operates
white marked (B) During cooling
operation

---- 5 ----
B420M/MS/MW, B480M/MS/MW,
B570M/MS/MW/D/D-*9, B53D2,
B643M/MS/MW/D/D-*9, B703M/MS/MW,
C603D, C703M/MS/MW/D
Check if the timer motor is
properly running through the
"VIEW WINDOW" located at
the side of timer body. You can
see the gear moving.
Continuity
Continuity Check fan motor
continuity.
Moving.
Manually set timer to
condition A. and confirm
that defrost heater heats up.
No contiunity
Not movimg.
Heats up.
VIEW WINDOW
(to check gear moving)
Short circuit orange (2) and brown (1)
terminals of timer (both ends of
bimetal will be short circuited), and
confirm that defrosting heater heats up.
Does not heat up.
Heats up.
Does not
heats up.
Tu rn the COLD AIR CONTROL
to D or E.
Tu rn the COLD AIR CONTROL
to A or B.
Replace door switch
Replace fan motor
(broken coil).
Repair cooling unit
(initial gas leakage).
Replace bimetal
thermostat (broken).
 Excessive door gap.
 Door open for long
period.
Replace timer
(broken coil).
Replace timer
(faulty operationl).
Replace bimetal thermostat
(does not switch ON).
Replace timer (no continuity
between defrosting contacts).
Rotating
direction
Cam shaft

---- 6 ----
B420M/MS/MW, B480M/MS/MW,
B570M/MS/MW/D/D-*9, B53D2,
B643M/MS/MW/D/D-*9, B703M/MS/MW,
C603D, C703M/MS/MW/D
SECTION II SPECIFICATIONS & COMPONENTS
MODEL NR-B420M/MW NR-B420MS NR-B480MS
SPECIFICATIONS
SEALED UNIT
ELECTRIC PARTS
Starting relay
(contact-less type)
PTH7M330MC2
Overload protector 5TM734MFBYY 4TM757LFBYY-68
Thermostat TBA-1011
Fan motor UDVH15NA3H UDVH15NA1Y
Fan blade
φ
100
TMDJ-702AC1/Cycle: 18 hours 46 min./ 50Hz; 7 hours 18 min./60Hz
Defrost timer Rating of contacts: 240V/5A,
Winding resistance: OPEN (to DC test voltages)
Bimetal thermo. US-602SXRMQ0-TO, Temp. cut-in: -5°C. Temp. cut-out: 13°C
Rating of contacts: 250V/10A
Fuse G4A00072, 380V/10A/72°C
Defrost heater 230V/150W/353 Ω
PC damper thermo. SD-8021-4
Lamp bulb E14/240V/15W
Door switch (PC) (PC: 3111) 250V/1A
Running capacitor 4µF/350V 6µF/400V
Compressor DD86C18RAW5 D110C22RAX6
(Winding Resistance (Main) 8.5 Ω(Main) 5.21 Ω
measured at 20°C) (Auxiliary) 21.1 Ω(Auxiliary) 7.02 Ω
Evaporator Fin tube type
Condenser Wrapper type (Consealed condenser)
Refrigerant charge HFC-134a, 145g
Oil charge 350 ml 300 ml
Net Capacity 338L (FC:89L, PC: 249L) 433L (FC:103L, PC: 330L)
Gross Capacity 369L (FC:111L, PC: 258L) 473L (FC:129L, PC: 344L)
Outside dimensions
Width 674 mm 694 mm
Depth 690 mm 690/701 mm
Height 1,650 mm 1,780 mm
Net weight 66 kg 68 kg
Type Frost-free refrigerator/freezer
Temperature control Full-automatic direct control (FC: ATC thermo., PC: Damper thermo.)
Defrosting Full-automatic heater defrost with timer
Defrost water disposal Full-automatic (Forcible evaporated into the air)
Exterior finish Polyester coated finish
Inner liner Vacuum formed ABS resin
Insulation Polyurethane foam (cabinet & door)
Power source AC 220~240V/50Hz AC 220~230V/60Hz

---- 7 ----
B420M/MS/MW, B480M/MS/MW,
B570M/MS/MW/D/D-*9, B53D2,
B643M/MS/MW/D/D-*9, B703M/MS/MW,
C603D, C703M/MS/MW/D
MODEL NR-B480M/MW NR-B570M/MW NR-B570MS/D-*9
SPECIFICATIONS
SEALED UNIT
ELECTRIC PARTS
Starting relay
(contact-less type)
PTH7M 330MD2
Overload protector 5TM734MFBYY MM3-27FCF 4TM757LFBYY-68
Thermostat TBA-1011 TBA-1002
Fan motor UDVH15NA3H UDVH15NA1Y
Fan blade
φ
100
φ
120
TMDJ-702ACl/Cycle: 8 hours 46min./ 50Hz; 7 hours 18 min./60Hz
Defrost timer Rating of contacts: 240V/5A,
Winding resistance: OPEN (to DC test voltages)
US-602SXRMQ0-TO, Temp. cut-in: -5°C. Temp. cut-out: 13°C
Bimetal thermo. Rating of contacts: 250V/10A,
Winding resistance: OPEN (to DC test voltages)
Fuse G4A00072, 380V/10A/72°C
Defrost heater 230V/200W/265 Ω
PC damper thermo. SD-8021-4 SD-8031
Lamp bulb E14/240V/15W
Door switch (PC) (PC: 3111) 250V/1A
Running capacitor 4µF/350V 4µF/400V 6µF/400V
Compressor DD86C18RAW5 D110C21RAX5 D110C22RAX6
(Winding Resistance (Main) 8.53 Ω(Main) 7.28 Ω(Main) 5.21 Ω
measured at 20°C) (Auxiliary) 21.1 Ω(Auxiliary) 17.5 Ω(Auxiliary) 7.02 Ω
Evaporator Fin tube type
Condenser Wrapper type (Consealed condenser)
Refrigerant charge HFC-134a, 145g HFC-134a, 140g
Oil charge 350 ml 310ml 300 ml
Net Capacity 385L (FC:89L, PC: 296L) 456L (FC:103L, PC: 353L)
Gross Capacity 418L
(FC:111L, PC: 307L) 497L (FC:129L, PC: 368L)
Outside dimensions
Width 694 mm 724 mm 724 mm
Depth 609/701 mm 731 mm 731/742 mm
Height 1,780 mm 1,752 mm 1,752 mm
Net weight 68 kg 70 kg
Type Frost-free refrigerator/freezer
Temperature control Full-automatic direct control (FC: ATC thermo., PC: Damper thermo.)
Defrosting Full-automatic heater defrost with timer
Defrost water disposal Full-automatic (Forcible evaporated into the air)
Exterior finish Polyester coated finish
Inner liner Vacuum formed ABS resin
Insulation Polyurethane foam (cabinet & door)
Power source AC220-240V/50Hz AC220-230V/60Hz

---- 8 ----
B420M/MS/MW, B480M/MS/MW,
B570M/MS/MW/D/D-*9, B53D2,
B643M/MS/MW/D/D-*9, B703M/MS/MW,
C603D, C703M/MS/MW/D
MODEL NR-B570D NR-B643D/B53D2 NR-B643MS/D-*9
SPECIFICATIONS
SEALED UNIT
ELECTRIC PARTS
Starting relay
(contact-less type)
PTH7M 330MD2
Overload protector MM3-28GCF 4TM757LFBYY-68
Thermostat TBA-1002
Fan motor UDVH15NA3H UDVH15NA1Y
Fan blade
φ
120
TMDJ-702ACl/Cycle: 8 hours 46min./ 50Hz; 7 hours 18 min./60Hz
Defrost timer Rating of contacts: 240V/5A,
Winding resistance: OPEN (to DC test voltages)
Bimetal thermo. US-602SXRMQ0-TO, Temp. cut-in: -5°C. Temp. cut-out: 13°C
Rating of contacts: 250V/10A
Fuse G4A00072, 380V/10A/72°C
Defrost heater 230V/200W/265Ω
PC damper thermo. SD-8031 SD-8051/SD-8081-1(B53D2)
Lamp bulb E14/240V/15W
Door switch (PC) (PC : 3111) 250V/1A
Running capacitor 4µF/400V 6µF/400V
Compressor DB91C19RAY5 D110C22RAX6
(Winding Resistance (Main) 9.65 Ω(Main) 5.21 Ω
measured at 20°C) (Auxiliary) 12.98 Ω(Auxiliary) 7.02 Ω
Evaporator Fin tube type
Condenser Wrapper type (Consealed condenser)
Refrigerant charge HFC-134a, 140g
Oil charge 350 ml 300 ml
Net Capacity 456L (FC:103L, PC: 353L) 521L (FC:129L, PC: 392L)
Gross Capacity 497L
(FC:129L, PC: 368L) 567L (FC:158L, PC: 409L)
Outside dimensions
Width 774 mm 774 mm 774 mm
Depth 742 mm 771 mm 760/771 mm
Height 752 mm 1,772 mm 1,772 mm
Net weight 70 kg 81 kg
Type Frost-free refrigerator/freezer
Temperature control Full-automatic direct control (FC: ATC thermo., PC: Damper thermo.)
Defrosting Full-automatic heater defrost with timer
Defrost water disposal Full-automatic (Forcible evaporated into the air)
Exterior finish Polyester coated finish
Inner liner Vacuum formed ABS resin
Insulation Polyurethane foam (cabinet & door)
Power source AC220~240V/50Hz AC220~230V/60Hz

---- 9 ----
B420M/MS/MW, B480M/MS/MW,
B570M/MS/MW/D/D-*9, B53D2,
B643M/MS/MW/D/D-*9, B703M/MS/MW,
C603D, C703M/MS/MW/D
MODEL NR-B643M/MW NR-B703M/MW NR-B703MS
SPECIFICATIONS
SEALED UNIT
ELECTRIC PARTS
Starting relay
(contact-less type)
PTH7M330MD2
Overload protector MM3-27FCF 4TM757LFBYY-68
Thermostat TBA-1002
Fan motor UDVH15NA3H UDVH15NA1Y
Fan blade
φ
120
TMDJ-702AC1/Cycle: 8 hours 46 min./ 50Hz; 7 hours 18 min./60Hz
Defrost timer Rating of contacts: 240V/5A,
Winding resistance: OPEN (to DC test voltages)
Bimetal thermo. US-602SXRMQ0-TO, Temp. cut-in: -5°C. Temp. cut-out: 13°C
Rating of contacts: 250V/10A
Fuse G4A00072, 380V/10A/72°C
Defrost heater 230V/200W/265 Ω
PC damper thermo. SD-8051
Lamp bulb E14/240V/15W
Door switch (PC) (PC: 3111) 250V/1A
Running capacitor 4µF/400V 6µF/400V
Compressor D110C21RAX5 D110C22RAX6
(Winding Resistance (Main) 7.28 Ω(Main) 5.21 Ω
measured at 20°C) (Auxiliary) 17.5 Ω(Auxiliary) 7.02 Ω
Evaporator Fin tube type
Condenser Wrapper type (Consealed condenser)
Refrigerant charge HFC-134a, 140g
Oil charge 310ml 300ml
Net Capacity 521L (FC:129L, PC: 392L) 541L (FC:129L, PC: 412L)
Gross Capacity
567L (FC:158L, PC: 409L) 588L (FC:158L, PC: 430L)
Outside dimensions
Width 774 mm 774 mm
Depth 760 mm 760 mm
Height 1,772 mm 1,822 mm
Net weight 81 kg 84 kg
Type Frost-free refrigerator/freezer
Temperature control Full-automatic direct control (FC: ATC thermo., PC: Damper thermo.)
Defrosting Full-automatic heater defrost with timer
Defrost water disposal Full-automatic (Forcible evaporated into the air)
Exterior finish Polyester coated finish
Inner liner Vacuum formed ABS resin
Insulation Polyurethane foam (cabinet & door)
Power source AC220-240V/50Hz AC220/60Hz

---- 10 ----
B420M/MS/MW, B480M/MS/MW,
B570M/MS/MW/D/D-*9, B53D2,
B643M/MS/MW/D/D-*9, B703M/MS/MW,
C603D, C703M/MS/MW/D
MODEL NR-C603D NR-C703D NR-C703M/MW C703MS
SPECIFICATIONS
SEALED UNIT
ELECTRIC PARTS
Starting relay
(contact-less type)
PTH7M330MD2
Overload protector MM3-28GCF MM3-27FCF 4TM757LFBYY-68
Thermostat TBA-1002
Fan motor UDVH15NA3H UDVH15NA1Y
Fan blade
φ
120
TMDJ-702AC1/Cycle: 8 hours 46 min./ 50Hz
Defrost timer Rating of contacts: 240V/5A,
Winding resistance: OPEN (to DC test voltages)
Bimetal thermo. US-602SXRMQ0-TO, Temp. cut-in: -5°C. Temp. cut-out: 13°C
Rating of contacts: 250V/10A
Fuse G4A00072, 380V/10A/72°C
Defrost heater 230V/200W/265 Ω
PC damper thermo. SD-8051
Lamp bulb E14/240V/15W
Door switch (PC) (PC: 3111) 250V/1A
Running capacitor 4µF/400V 6µF/400V
Compressor DB91C19RAY5 D110C21RAX5 D110C22RAX6
(Winding Resistance (Main) 9.65 Ω(Main) 7.28 Ω(Main) 7.28 Ω
measured at 20°C) (Auxiliary) 12.98 Ω(Auxiliary) 17.5 Ω(Auxiliary) 7.02 Ω
Evaporator Fin tube type
Condenser Wrapper type (Consealed condenser)
Refrigerant charge HFC-134a, 140g
Oil charge 350ml 310ml 300ml
Net Capacity 476L (FC: 103L, PC: 272L, VC:101L) 534L (FC: 129L, PC: 289L, VC: 116L)
Gross Capacity
515L (FC: 129L, PC: 276L, VC: 110L) 585L (FC: 158L, PC: 304L, VF: 123L)
Outside dimensions
Width 724 mm 774 mm 774 mm
Depth 742 mm 771 mm 760 mm
Height 1,822 mm 1,822 mm 1,822 mm
Net weight 81 kg 88 kg
Type Frost-free refrigerator/freezer
Temperature control Full-automatic direct control (FC: ATC thermo., PC: Damper thermo.)
Defrosting Full-automatic heater defrost with timer
Defrost water disposal Full-automatic (Forcible evaporated into the air)
Exterior finish Polyester coated finish
Inner liner Vacuum formed ABS resin
Insulation Polyurethane foam (cabinet & door)
Power source AC220-240V/50Hz

---- 11 ----
B420M/MS/MW, B480M/MS/MW,
B570M/MS/MW/D/D-*9, B53D2,
B643M/MS/MW/D/D-*9, B703M/MS/MW,
C603D, C703M/MS/MW/D
SECTION III SCHEMATIC DIAGRAMS
SCHEMATIC DIAGRAM
WIRING CONNECTION DIAGRAM
WT YW
THERMOSTAT
RD
GY
FAN MOTOR
BK2
THERMAL FUSE
Y2
SB2
DEFROST
HEATER
N.O C N.C
PK BK LB
DOOR SWITCH
(PC)
LAMP
WT
LB
1234
N.O.
C
N.C.
SB OR YG GY
DEFROST TIMER
TIMER BOX
RUNNING CAPACITOR
GY WT
GY2
WT3 BK4
BW LB
BK
1
3
OVERLOAD
PROTECTOR
BK
M
MOTOR
A6
5
WT
GY
2
1
STARTING
RELAY
M2
C
BIMETAL THERMOSTAT SB

---- 12 ----
B420M/MS/MW, B480M/MS/MW,
B570M/MS/MW/D/D-*9, B53D2,
B643M/MS/MW/D/D-*9, B703M/MS/MW,
C603D, C703M/MS/MW/D
SECTION IV DISASSEMBLY INSTRUCTION
THERMOSTAT BIMETAL THERMO., THERMAL FUSE,
FAN MOTOR AND DEFROST HEATER
 Take out the ice tray, ice server and freezer shelf.
 Remove the screws (2 pcs) which fix the ice tray rail.
 Remove a cap and a screw at the right of evaporator cover.
NOTE:
Thermo. dial can not be removed by pulling it toward you.
 Remove cap and screw.
 Pull the evaporator cover toward you.
Pull the right portion of evaporator cover at first.
Pull the top portion of evaporator cover.
 Pull the left part of thermo. cover toward you to remove.
 Disconnect the terminals (2pcs.).
 Unhook thermo. capillary.
 Remove the screws (2pcs.) which fix the thermostat.
 Then thermostat and thermo. dial can be removed.
CAUTION
To replace the thermostat
 Thermo. capillary should be hooked in plate.
 Each part is installed as shown in the figure.
(BIMETAL THERMO., AND THERMAL FUSE)
 Pull the bimetal thermo. to the direction of arrow.
 Cut binding tube and remove thermal fuse.
To replace bimetal thermostat
 Be sure to set bimetal thermostat so that heat sensor.
(Orange wire should be lower.)
Cap Evaporator Cover
Rib
Rib
Ice Tray Rail Screw
Thermo.
dial FC
Thermo.
Box
Freezer
Shelf
Connector
Te r minal
Thermo. Box
Thermo. capillary
Hook for
thermo. capillary
Binding
tube
Binding
tube
ScrewScrew
Thermostat
Bimetal thermo.
Thermal fuse
Bimetal thermo.
Thermal
fuse
Defrost heater
ScrewScrew

---- 13 ----
B420M/MS/MW, B480M/MS/MW,
B570M/MS/MW/D/D-*9, B53D2,
B643M/MS/MW/D/D-*9, B703M/MS/MW,
C603D, C703M/MS/MW/D
To replace thermal fuse
 Be sure to put thermal fuse in place.
 Bind lead wire without loose as shwn in the figure.
(FAN MOTOR)
 Disconnect the terminals (2 pcs).
 Unhook lead wire (gray& red color).
 Remove the screws (4 pcs) which fix the bracket fan motor
back.
(DEFROST HEATER)
 Remove the fan motor and evaporator cover.
 Lifting the evaporator at right gradually, pull it toward you.
NOTE:
Special care should be taken not to twist and break the pipe.
 Remove the fan blade.
 Remove the screws (2pcs.) and which fix the fan motor.
To replace the fan motor
 Insert the blade into the shaft of fan motor for 0mm from
the edge of shaft.
 Adjust lead wire after to replace fan motor.
 Heater holder is hooked to the evaporator pipe.
Disconnect the connector of heater lead wire.
 Lift the edge of heater and make it straight.
Then pull the heater holder as shown in the figure.
To replace the defrost heater
 Insert the heater into the heater holder properly.
 Hook the heater holder to the evaporator pipe.
 Arrange the lead wire of heater by using hook for lead wire
so that it will not loose.
Just flat
Shaft of fan
EvaporatorSuction pipe
Screw
Lead wire Hook for lead wire
Bracket Fan moter back
Fan blade
Screw
Connector Fan motor
Eva. holder
Evaporator
Lead wire
Heater holder
Heater holder
Edge
Heater cover
Defrost
heater
Fan blade
Hook
for lead wire
Heater cover
Defrost heater
Screw
Screw
Fan motor

---- 14 ----
B420M/MS/MW, B480M/MS/MW,
B570M/MS/MW/D/D-*9, B53D2,
B643M/MS/MW/D/D-*9, B703M/MS/MW,
C603D, C703M/MS/MW/D
DEFROST TIMER STARTING RELAY AND OVERLOAD
PROTECTOR
 Remove the screws (5 pcs) which fix the comp. cover.
 Remove the comp. cover.
 Remove the clamp and the cover.
 Unscrew screw (2pcs.).
 Pull the connector downwards to remove.
 Pushing the ribs (2portions), pull the timer box
rightwards.
 Remove defrost timer, A.T bimetal thermo.
To replace the defrost timer
 Be sure to set the timer in coolimg operation.
 Rotating direction of cam shaft is counter-clockwise.
 Pull the starting relay leftwards to remove.
 Pushing both ends of clips inwards, pull up the overload
protector.
To replace the overload protector
 The overload protector should be in the clip.
Install the protector to touch the compressor.
Rib
Relay cover
driver
Starting relay
Overload protector
Push inward
Clip
Rib
Screw
Screw
Defrost
Timer
Screw
Ac cord
assy
Screw Comp. Cover
(only Asia models)
Screw
Screw
Screw

---- 15 ----
B420M/MS/MW, B480M/MS/MW,
B570M/MS/MW/D/D-*9, B53D2,
B643M/MS/MW/D/D-*9, B703M/MS/MW,
C603D, C703M/MS/MW/D
 Remove lamp cover
 Remove screws (3pcs.), and pull the bottom part of
control plate ass'y.
 Tear off the tapes on insulation.
Open the insulation from the front side
Pull the upper portion.)
 Remove the damper thermostat from insulation.
 Pull the thermo. dial toward you.
. Then separate the insulation from the control plate.
REFRIGERANT FLOW DIAGRAM
 Refrigerant flows in the refrigerating unit as shown in the figure.
 Number in the figure of "PIPE LAYOUT" corresponds to number in the refrigerant flow diagram.
To replace damper thermo.
 Sealing dial should be put in place.
 Seal the gap between the from insulation and the back
insulation by putting tape.
 Hook the sensor bulb in place.
DAMPER THERMOSTAT
Screw
Screw
Insulation
Control panel
Thermo. dial
Lamp cover
Control plate
Ass’y
Back insulation
Sealing dial
Sensor tube
Damper
Thermostat
Side Condenser
(Left)
Side Condenser (Right)
Mullion Dryer
Pipe
Evaporator
Back Condenser
Capillary Tude
Compressor Dryer

---- 16 ----
B420M/MS/MW, B480M/MS/MW,
B570M/MS/MW/D/D-*9, B53D2,
B643M/MS/MW/D/D-*9, B703M/MS/MW,
C603D, C703M/MS/MW/D
SECTION V PARTS LOCATION
NR-B420M/MS/MW, B480M/MS/MW
B420MW
B480MW
ONLY
B420MW
B480MW ONLY
}

---- 17 ----
B420M/MS/MW, B480M/MS/MW,
B570M/MS/MW/D/D-*9, B53D2,
B643M/MS/MW/D/D-*9, B703M/MS/MW,
C603D, C703M/MS/MW/D
NR-B420M/MS/MW, B480M/MS/MW
ONLY
B420M/MW
B480M/MW
263
263
264

---- 18 ----
B420M/MS/MW, B480M/MS/MW,
B570M/MS/MW/D/D-*9, B53D2,
B643M/MS/MW/D/D-*9, B703M/MS/MW,
C603D, C703M/MS/MW/D
NR-B570M/MS/MW/D/D-*9, B53D2, B643M/MS/MW/D/D-*9, B703M/MS/MW
B570M/MW
B643M/MW
B703M/MW
}
ONLY
134
B570M/MW
B643M/MW
B703M/MW
}
ONLY
155
156
156
B53D2
ONLY

---- 19 ----
B420M/MS/MW, B480M/MS/MW,
B570M/MS/MW/D/D-*9, B53D2,
B643M/MS/MW/D/D-*9, B703M/MS/MW,
C603D, C703M/MS/MW/D
NR-B570M/MS/MW/D/D-*9, B53D2, B643M/MS/MW/D/D-*9, B703M/MS/MW
ONLY
B570M/MW
B643M/MW
B703M/MW
B570D, B643D,
B53D2, ONLY
263
264
220

---- 20 ----
B420M/MS/MW, B480M/MS/MW,
B570M/MS/MW/D/D-*9, B53D2,
B643M/MS/MW/D/D-*9, B703M/MS/MW,
C603D, C703M/MS/MW/D
NR-C603D, C703M/MS/MW/D
ONLY
C703M/MW
ONLY
C703M/MW
(ONLY
C703)
162