Panasonic NR-BW414MN User manual

Order No. PHAT090301C3
(Revision : Nov. 2012)
Service Manual
Refrigerator
NR-BW414MN, NR-BW414SS, NR-BW414SN, NR-BW414SW
NR-BW414VS, NR-BW414XN / NR-BW464VS, NR-BW464XN
Product Colour
Silver (SL)
Champagne (SN)
Stainless (ST)
Destination
Malaysia, Hong Kong
Singapore, India, Vietnam
RBD, Indonesia, Philippines
PGF, GULF (Gen)
© Panasonic Appliances (Thailand) Co., Ltd. 2012.
All rights reserved. Unauthorized copying and
distribution is a violation of law.
There are special components used in this equipment which are important for safety. These parts are marked by in the
Schematic Diagrams, Circuit Board Diagrams, Exploded Views and Replacement Parts List. It is essential that these critical
parts should be replaced with manufacturer’s specified parts to prevent shock, fire or other hazards. Do not modify the
original design without permission of manufacturer.
IMPORTANT SAFETY NOTICE
WARNING
The service information is designed for experienced repair technicians only and is not designed for use by the general public.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a
product. Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any
attempt to service or repair the product or products dealt within this service information by anyone else could result in serious
injury or death.
CFCs have been used in refrigerant as refrigerator 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 of 1995.
NR-BW414MN
NR-BW414SS
NR-BW414SN
NR-BW414SS
NR-BW414SW
(WG, AE)
NR-BW414VS
NR-BW414XN
NR-BW464VS
NR-BW464XN

CONTENT
Page
3
4
5
6
6
6
7
8
9
10
11
12
13
14~15
16
17
18
18
19
20~22
23~26
27
28
29
30~34
35
1. Safety Cautions for Repairing
1.1 Warning
1.2 Caution
2. Specification and Components
2.1 NR-BW414SS, NR-BW414MN, NR-BW414VS, NR-BW414XN
2.2 NR-BW464VS, NR-BW464XN
3. Performance Data
3.1 NR-BW414MN, NR-BW414SS, SN, SW
3.2 NR-BW414VS, NR-BW414XN
3.3 NR-BW464VS, NR-BW464XN
4. Self Protecting Function
4.1 Protection for IC
4.2 Protection for compressor locked
4.3 Protection for power supply droping
5. Self Diagnosing Function
6. Temperature Control
7. Refrigerator Instruction Guidelines
8. Troubleshooting Guide
8.1 Not cool at all [ Both PC and FC (compressor does not operate) ]
8.2 Cool, not enought [ Both PC and FC (compressor operates) ]
9. Schematic Diagram
9.1 Wiring Connection : NR-BW414MN, NR-BW414SS, SN, SW
9.2 Wiring Connection : NR-BW414VS, NR-BW414XN, NR-BW464VS, NR-BW464XN
10. Disassembly Instruction
10.1 Cover Control
10.2 PAS Control
11. Repairing Procedure
12. Technical Information
12.1 NR-BW414MN, NR-BW414SS, SN, SW (Non Inverter)
12.2 NR-BW414VS, NR-BW414XN, NR-BW464VS, NR-BW464XN (Inverter)
13. Parts Exploded View and Replacement Parts List
13.1 Parts Exploded View : Body
13.2 Parts Exploded View : Door
13.3 Parts Exploded View : Packing
13.4 Replacement Parts List
Detail Change Notice
NR-BW414 / NR-BW464
- 2 -

1. SAFETY CAUTIONS FOR REPAIRING
NR-BW414 / NR-BW464
- 3 -
When you repair the refrigerator, please kindly take care for the following cautions.
1.1 Warning
Before repairing unit, unplug supply cord
• Before you repair the refrigerator, please unplug the supply cord.
Use authentic parts when repairing
• When you replace the parts, please use authentic parts to replace defective parts.
Caution during brazing
• When you use touch for brazing, please ensure ventilation.
Otherwise, you will be poisoned by carbon monoxide.
Pay attention to using refrigerant
• If refrigerant touches fire, the gas becomes poisonous gas.
Pay attention to getting electricity shock
• When you check the voltage of terminal, please do not touch the electricity part terminal.
• When you replace the parts, please wait for 3 minutes at least for discharging capacitor.
Check safety after repairing
• Check the screws, parts, lead wires to take in place.
• Check the repairing portion whether circumferential parts are damaged or not.
• Check insulation resistance between supply plug and earth.
• When install refrigerator, check condition of supply cord and plug.
• Wipe off the dust on plug.
• Cutting and seal the electric device carefully.
1.2 Caution
Watch the hot parts
• During operation and after operation, compressor and pipes are hot.
• Also, under these condition, heater are hot.
• Do not burn your fingers when you touch it.
Pay attention to refrigerant
• Do not touch liquid refrigerant. Otherwise your hands may be burnt.
Pay attention to edge of parts
• Otherwise, your fingers may be cut.
Pay attention to fins of evaporator and condenser
• Otherwise, your fingers may be cut.
Before transportation, adjust the bolt
• Otherwise, the floor may be damaged.
Do not touch the pipe after brazing
• Otherwise, your hands may be burnt.

2. SPECIFICATION AND COMPONENTS
Specification
NR-BW414 / NR-BW464
- 4 -
418L
(FC : 81, PC : 249)
675 x 695 x 1629 (mm.) [ W x D x H ]
FC : Electronic control (PCB)
PC : Baffle damper thermostat
Full-automatic heater defrost with a timer
Level 5
PCM colour - (Polyester paint coating / Polyester paint steel)
Vacuum Formed ABS resin
Polyurethane foam (cabinet and door)
330L
(FC : 130, PC : 288)
64 Kg.66 Kg.
Capacity
(Total Gross Volume)
Capacity
(Total Storage Volume)
External Dimension
Net Weight (Kg.)
Temperature Control
Defrosting
Freezer Rating
Exterior Finish
(Cabinet /Door)
Inner Liner
Insulation
Sealed Unit
EFI100E13DGH-COECS
Wrapper Type (Concealed condenser)
Fin Tube Type
R600aHFC-134a
60 ± 5g150 ± 5g
R215 ± 5ml (freol S -10)280 ± 5ml (freol S - 10)
DG77C14RAW5-L2ZAS
(DHS73C10RAW FOR MALAYSIA AND INDIA MODEL)
Compressor
(Winding resistance at 20˚C)
Evaporator
Condenser
Refrigerant Type
Charge
Oil Charge
Electric Part
DC 14V / 1.54W
250V / 0.5a
Ø 90mm. prop fan (Box Type)
NTC
B = 3819K ± 2%
R10 = 3.899KΩ± 3%
NTC
250V / 10A / 73˚C
B = 3850K ± 2%
R20 = 18.9KΩ± 1.8%
D3D-121 (S.P. - S.T.)
E14 / 22, 240V / 10WE14 / 22, 240V / 15W
No usePTH7M330MD2
PAS - B41MV4PAS - B37M4
MM6-8V34 230V / 176WMM6-4343 220V / 183W
MM3-20DCW5TM232NHBYY-53
No use4µF - 400V
(1) Ambient Temp. over 34˚C 8h(1) Ambient Temp. over 34˚C 7h
(2) Ambient Temp. 23˚C ~ 33˚C 8h(2) Ambient Temp. 23˚C ~ 33˚C 7h
(3) Ambient Temp. under 22˚C 13h(3) Ambient Temp. under 22˚C 13h
(4) Power ON 4h add(4) Power ON 6h add
DC 9V / 1.53W
Door Switch
Fan Motor
PTC Relay
Fan Blade
Type
Type
Rating
Type
Rating
Defrost Sensor
(DFC)
Type
Rating
FC Sensor
(FCC)
Defrost Thermal Fuse
Type
Rating
Control Board
Defrost Timer
(Electronic PCB Control)
Defrost Heater
Overload Protector
Running Capacitor
2.1 NR-BW414SS, NR-BW414MN, NR-BW414VS, NR-BW414XN
PCM PCM Stainless PCM Stainless
MY HK 1N 2N VN WA WG MYAE WG AE HK VN MY MY PH 1N VN MY SG VN 1DWA 1D
S3P S3P B3P C2P C2P
C2P
(SHUKO)
S3PS3P
C2P
(SHUKO)
S3P S3P C2P S3P S3P A2P B3P C2P S3P S3P C2P C2PC2P C2P
240V 220V 230V 220V 220~
240V
220~
240V 240V
220~
240
220~
240V
220~
240V 220V 220V 240V 240V 230V 230V 220V 240V 230V 220V 220~ 240V
220~
240V
220~
240V
Malaysia Hong Kong India Vietnam RBD PGF MalaysiaGULF PGF GULF Hong Kong Vietnam Malaysia Malaysia Philippines India Vietnam Malaysia Singapore Vietnam Indonesia RBD Indonesia
NR-BW414SS NR-BW414SN NR-BW414SW NR-BW414MN NR-BW414VS NR-BW414XNMODEL
Destination
Code Attached Model
Material Spec.
Plug
Power Source

NR-BW414 / NR-BW464
- 5 -
Specification
(Total Gross Volume)
Capacity 463L
(FC : 130L, PC : 333L)
372L
(FC : 81L, PC : 291L)
675 x 695 x 1769 (mm.) [ W x D x H ]
67 Kg.
FC : Electronic control (PCB)
PC : Baffle damper thermostat
Full-automatic heater defrost with a timer
3 stars
Vacuum Formed ABS resin
Polyurethane foam (cabinet and door)
PCM colour (Polyester paint coating) Stainless Steel
Capacity
(Total Storage Volume)
External Dimension
Net Weight (Kg.)
Temperature Control
Defrosting
Freezer Star Rating
Exterior Finish (Cabinet / Door)
Inner Liner
Insulation
Sealed Unit
(Winding resistance at 20˚C)
Compressor EFI100E13DGH-COECS
Fin Tube Type
Wrapper Type (Concealed condenser)
R600a
60 ± 5g
215 ± 5ml (freol S - 10)
Evaporator
Condenser
Refrigerant Type
Charge
Oil Charge
Electric Part
Door Switch D3D-121 (S.P. - S.T.)
250V / 0.5A
Ø 90 mm. prop fan (Box Type)
DC 14V / 1.54W
E14 / 22, 240V / 10W
No use
MM6-8V34, 230V / 176W
MM3-20DCW
No use
NTC
B = 3819K ± 2%
R10 = 3.899KΩ± 3%
NTC
B = 3850K ± 2%
R20 = 18.9KΩ± 1.8%
250V / 10A / 73˚C
PAS - B41MV4
(1) Ambient Temp. over 34˚C 8h
(2) Ambient Temp. 23˚C ~ 33˚C 8h
(3) Ambient Temp. under 22˚C 13h
(4) Power ON 4h add
Fan Motor
Fan Blade
PTC Relay
Type
Rating
Type
Type
Rating
Type
Rating
Control Board
Defrost Timer
(Electronic PCB Control)
Defrost Heater
Motor Protector
Running Capacitor
Defrost Sensor (DFC)
Type
Rating
FC Sensor (FCC)
Defrost Thermal Fuse
2.2 NR-BW464VS, NR-BW464XN
MODEL NR-BW464XNNR-BW464VS
Destination Malaysia Hong Kong India Vietnam RBD Philippines Indonesia Malaysia Hong Kong Singapore Vietnam Indonisia
MY HK 1N VN WA PH 1D MY HK SG VN 1D
S3P S3P B3P C2P
PCM
C2P A2P C2P S3P S3P S3P
Stainless
C2P C2P
240V 220V 230V 220V 220~240V 230V 220~240V 240V 220V 230V 220~240V 220~240V
Code Attached Model
Material Spec.
Plug
Power Source

NR-BW414 / NR-BW464
- 6 -
3. PERFORMANCE DATA
3.1 NR-BW414MN, NR-BW414SS, SN, SW
Mean Fresh Food Compartment Temperature
Mean Freezer Load Temperature
(°C)
(°C)
(°C)
(°C)
t3 (°C)
Vegetable Crisper Temperature
PC Door Shelf Upper Temperature
(°C)Egg Tray Temperature
PC Door Shelf Bottom Temperature
1.0 ± 2.5 4.0 ± 2.5 7.0 ± 2.5
-23.5 ± 2.5 -20.0 ± 2.5 -15.0 ± 2.5
Running Ratio (%) 75 ± 15 60 ± 15
Power Consumption (KWh/Day) 2.1
45 ± 15
-
7.0 ± 2.5
-
--
5.5 ± 2.5
-
--
- 6.0 ± 2.5 -
“ 3 ”Thermostat Dial Setting “ 2 ” “ 1 ”
3.2 NR-BW414VS, NR-BW414XN
Mean Fresh Food Compartment Temperature
Mean Freezer Load Temperature
(°C)
(°C)
(°C)
(°C)
t3 (°C)
Vegetable Crisper Temperature
PC Door Shelf Upper Temperature
(°C)Egg Tray Temperature
PC Door Shelf Bottom Temperature
1.0 ± 2.5 3.5 ± 2.5 7.0 ± 2.5
-22.0 ± 2.5 -19.5 ± 2.5 -15.0 ± 2.5
Running Ratio (%) 85 ± 15 75 ± 15
Power Consumption (KWh/Day) 1.8
60 ± 15
-
7.0 ± 2.5
-
-
-
4.5 ± 2.5
-
--
- 5.0 ± 2.5 -
“ 3 ”Thermostat Dial Setting “ 2 ” “ 1 ”
3.3 NR-BW464VS, NR-BW464XN
Mean Fresh Food Compartment Temperature
Mean Freezer Load Temperature
(°C)
(°C)
(°C)
(°C)
t3 (°C)
Vegetable Crisper Temperature
PC Door Shelf Upper Temperature
(°C)Egg Tray Temperature
PC Door Shelf Bottom Temperature
1.0 ± 2.5 4.0 ± 2.5 7.0 ± 2.5
-22.0 ± 2.5 -19.5 ± 2.5 -16.0 ± 2.5
Running Ratio (%) 85 ± 15 75 ± 15
Power Consumption (KWh/Day) 1.8
65 ± 15
-
4.0 ± 2.5
8.0 ± 2.5
-
-
4.5 ± 2.5
-
--
- 5.0 ± 2.5 -
“ 3 ”Thermostat Dial Setting “ 2 ” “ 1 ”

NR-BW414 / NR-BW464
- 7 -
4.1 Protection for IC
1Does IC receive IPM protect signal?
2IC orders to stop compressor for 10 min.
3After 10 min, does PCB check if IPM protect signal
is normal?
4IC cancels to stop compressor. Normal operating.
5After restarting, does “Stop compressor” occure 10
times within 2 min?
6IC cancels to stop compressor. Normal operating.
8Does system protection cycle for 333 times?
9IC orders to stop compressor completely.
YES
YES
NO
YES
• Normal operating.
• IC continues to stop compressor until 1 hour.
• IC indicates Self diagnosing sign.
NO
NO
YES
7After 1 hour.
SYSTEM PROTECT CONTROL CYCLE
1st time
OPERATE each 7min X 10 times COMPRESSOR 1hour STOP OPERATE each 7min X 10 times
SYSTEM PROTECT CONTROL CYCLE
333rd time
STOP COMPRESSOR
• IC continues to stop compressor until 1 hour.
• IC indicates Self diagnosing sign.
4. SELF PROTECTING FUNCTION

NR-BW414 / NR-BW464
- 8 -
4.2 Protection for compressor locked
1
• After starting 2 sec., does IC detect rpm <5r/sec>?
• After starting from 2 ~ 10 sec., does PCB detect
rpm over 120r/sec?
2IC orders to stop compressor for 10 min.
3IC cancels to stop compressor after 10 min.
4After restarting, does “Stop compressor” occure 10
times within 2 min?
5IC cancels to stop compressor. Normal operating.
7Does system protection cycle for 333 times?
8IC orders to stop compressor completely.
YES
NO
YES
SYSTEM PROTECT CONTROL CYCLE
1st time
OPERATE each 7min X 10 times
COMPRESSOR 1hour STOP OPERATE each 7min X 10 times
SYSTEM PROTECT CONTROL CYCLE
333rd time
STOP COMPRESSOR
NO
YES
NO
• Normal operating.
• IC continues to stop compressor until 1 hour.
• IC indicates Self diagnosing sign.
6After 1 hour.

NR-BW414 / NR-BW464
- 9 -
4.3 Protection for power supply droping
1Does Power supply voltage drop as condition >0.1
sec., and <160V AC?
2IC orders to stop compressor for 10 min.
3After 10 min, does PCB check power supply voltage
if it is > 180V AC?
4IC cancels to stop compressor. Normal operating.
5After restarting, does “Stop compressor” occure 10
times within 2 min?
6IC cancels to stop compressor. Normal operating.
YES
NO
NO
7After 1 hour.
NO
YES
YES
• Normal operating.
• IC continues to stop compressor until 1 hour.
• IC indicates Self diagnosing sign.
• IC continues to stop compressor until 1 hour.
• IC indicates Self diagnosing sign.

NR-BW414 / NR-BW464
- 10 -
How to use “Self diagnosing function”
1. Opening PC door and FC door, push
“Quick Freezing” bottom more than 5 sec.
2. Blinking LED of “Energy Saving” and “Quick
Freezing” during 3 sec.
3. After blinking at 3 sec., each LED show as below.
4. “Self diagnosing function” will automatically
cancel after 7 min., from start operation.
Energy Saving
Symptom Details of symptom Energy
Saving LED
Quick
Freezing LED
Freezer
Control LED
Normal None None None
Abnormal of FCC thermistor Break/short of FCC thermistor None Blinking None
Abnormal of DFC thermistor Break/short of DFC thermistor None Turn on None
Abnormal of ATC thermistor Break/short of ATC thermistor Blinking Turn on None
Abnormal of FC fan motor Break/lock of FC fan motor
Abnormal revolution of FC fan motor
Turn on Turn on None
Abnormal of Defrost heater in FC Break/short of Defrost heater Turn on None None
Abnormal of INV compressor Operate protector of IPM lock
Operate protector of voltage dropping
Operate protector of over voltage
Turn on Blinking None
Abnormal of PCB Error of communication
Error of EEPROM
Blinking Blinking None
Refrigerating unit trouble Gas leakage at high pressure side
poor compression
None None MAX blinking
Refrigerating unit trouble Gas leakage at low pressure side None None MIN blinking
Quick Freezing
Freezer Control
When abnormalist is cased in the refrigerator, the sign is display on LED
as below chart.
5. SELF DIAGNOSING FUNCTION