Panasonic NR-BY551SS User manual

Order No. PHAT091001C3
(Revision : May. 2011)
Service Manual
Refrigerator
NR-BY551MS, NR-BY551SS
NR-BY551VS, NR-BY551XS
NR-BY601VS, NR-BY601XS
Product Colour
Silver (SL)
Stainless (ST)
Destination
Thailand, Indonesia
Malaysia, Singapore
Vietnam, PGF, RBD
GULF (General)
India, Philippines
© Panasonic Home Appliances (Thailand) Co., Ltd. 2009.
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-BY551MS, SS NR-BY551VS, XS NR-BY601VS, XS
MIN
MAX
MIN
MAX

- 2 -
CONTENT
Page
3
4
5
6
7
8
9
10
11
12
13
14
15 - 16
17
18
19
20
21
22
22
23
23 - 24
24 - 25
26
27
28
29 - 32
33
1. Safety Cautions for Repairing
1.1 Warning
1.2 Caution
2. Specification and Components
2.1 NR-BY551MS, SS, VS, XS
2.2 NR-BY601VS, XS
3. Performance Data
3.1 NR-BY551S (AT 32 ± 1°C)
3.2 NR-BY551V (AT 32 ± 1°C)
3.3 NR-BY601V (AT 32 ± 1°C)
4. Self Protecting Function
4.1 Protecting for IC
4.2 Protection for compressor locked
4.3 Protection for power supply droping
5. Self Diagnoising Function
6. Temperature Control
7. Inverter Control Display
8. Refrigerator Instruction Guideline
9. Troubleshooting Guide
9.1 Not cool at all [ Both PC & FC (compressor does not operate) ]
9.2 Cool, not enough [ Both PC & FC (compressor operates) ]
10. Schematic Diagram
10.1 Wiring Diagram : NR-BY551MS
10.2 Wiring Diagram : NR-BY551SS
10.3 Wiring Diagram : NR-BY551VS, XS
10.4 Wiring Diagram : NR-BY601VS, XS
11. Disassembly Instruction
11.1 LCD Cover
11.2 Cover Control
11.3 PCB Control
11.4 Feature of Crisper
11.5 Maintain method : Take off Crisper handle
11.6 Maintain method : Crisper handle ass’y
12. Parts Exploded View and Replacement Parts List
12.1 Part Exploded View : Body
12.2 Part Exploded View : Door
12.3 Part Exploded View : Packing
12.4 Replacement Parts List : NR-BY551MS, SS, VS, XS / NR-BY601VS, XS
13. Detail Change Notice
NR-BY551 / NR-BY601

- 3 -
1. SAFETY CAUTIONS FOR REPAIRING
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 transportatin, adjust the bolt
• Otherwise, the floor may be damaged.
Do not touch the pipe after brazing
• Otherwise, your hands may be burnt.
NR-BY551 / NR-BY601

- 4 -
2. SPECIFICATION AND COMPONENTS
2.1 NR-BY551MS, NR-BY551SS, NR-BY551VS, NR-BY551XS
NR-BY551 / NR-BY601
Model
Destination
Code Attached Model
Material Spec.
System Spec.
Plug
Power Source
Thailand Malaysia Vietnam Indonesia Malaysia Vietnam PGF GULF Thailand Malaysia RBD Vietnam India
Philippines
Thailand Malaysia Singapore Indonesia Vietnam
TH MY VN WA MY VN WG AE TH MY WA VN 1N PH TH MY SG WA VN
C2P S3P C2P C2P S3P C2P
C2P
(SHUKO)
S3P C3P S3P C2P C2P B3P A2P C3P S3P S3P C2P C2P
220V 240V 220V
220
~240V
240V 220V
220
~240V
220
~240V
220V 240V
220
~240V
220V 230V 230V 220V 240V 230V
220
~240V
220V
Specification
Capacity
(Total Gross Volume)
Capacity
(Total Storage Volume)
External
Dimension
Temperature Control
Defrosting
Inner Liner
Insulation
Net Weight
Width(mm)
Depth(mm)
Height(mm)
Sealed Unit
Evaporator
Condenser
Compressor
Refrigerant
Oil charge
Type
Charge
Type
Charging Amt.
Electric Part
Door Switch
Fan Motor
Starting relay
Control Board
Defrosting Control
(Electronic PCB Control)
Defrost Heater
Overload Protector
Running Capacitor
Defrost Sensor (DFC)
FC Sensor (FCC)
Defrost Thermal Fuse
Light Device
(PC)
Light Device
(Crisper)
Type
Rating
Type
Rating
Type
Type
Rating
Type
Rating
Type
Rating
Type
Rating
Type
Rating
Type
Rating
Type
Rating
(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 (Rated time)
InverterInduction
250V / 10A / 73°C
LED Lamp PCB
12V / 100mA
LED Lamp PCB
5V / 30mA
4µF-400V No Use
MM3-20DCW
Micro Temp.
DC 9V / 1.53W
PAS-BY551M
5TM734MFBYY
4014052
Inverter
freol ∝- 22
215 ± 5ml280 ± 5ml
PTH7M330MD2
NR-BY551VS
PCM
NR-BY551XS
Stainless
Induction
NTC
B = 3850K ± 2%
NTC
No Use
B = 3819K ± 2%
551L
(FC : 153L, PC : 398L)
775
745
R-20 = 18.9KΩ
FC : Electronic control (PCB)
No Use
Polyurethane foam (cabinet and door)
freol S - 10
D3D-121 (S.P. - S.T.)
DC 14V / 1.54W
R10 = 3.899KΩ
PC : Baffle damper thermostat
Full-automatic heater defrost with Micro Controller
NR-BY551MS
Stainless
NR-BY551SS
PCM
461L
(FC : 99L, PC : 362L)
MM6-4386
FBA11J14VXA Ø 110mm. prop fan (Box Type)
1714
MM6-8V41
220V / 198W 220V / 198W
PAS-BY601X
250V / 0.5A
Vacuum Formed ABS resin
HFC-134a
150 ± 5g
Wrapper Type (concealed condenser)
R600a
65 ± 5g
Fin Tube Type
EFI100E13DGH-COECSDHS86C15RAW
82 Kg 80 Kg

- 5 -
2.2 NR-BY601VS, NR-BY601XS
NR-BY551 / NR-BY601
Model
Destination
Code Attached Model
Material Spec.
System Spec.
Plug
Power Source
Malaysia RBD Vietnam PGF GULF India Philippines Thailand Malaysia Singapore Indonesia Vietnam
MY WA VN WG AE 1N PH TH MY SG WA VN
S3P C2P C2P C2P(SHUKO) S3P B3P A2P C3P S3P S3P C2P C2P
240V 220~240V 220V 220~240V 220~240V 230V 230V 220V 240V 230V 220~240V 220V
Specification
Sealed Unit
Type
Charge
Type
Charging Amt.
Electric Part
Door Switch
Fan Motor
Control Board
Defrosting Control
(Electronic PCB Control)
Defrost Heater
Overload Protector
Defrost Sensor (DFC)
FC Sensor (FCC)
Defrost Thermal Fuse
Light Device
(PC)
Light Device
(Crisper)
Type
Rating
Type
Rating
Type
Type
Rating
Type
Opening Temp.
Closing Temp.
Type
Rating
Type
Rating
Type
Rating
Type
Rating
Type
Rating
(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 (Rated time)
250V / 0.5A
Vacuum Formed ABS resin
602L
(FC : 153L, PC : 449L)
775
745
511L
215 ± 5ml
freol S -10
(FC : 99L, PC : 412L)
1846
FC : Electronic control (PCB)
MM6-8V41
220V / 198W
PAS-BY601X
86 Kg
DC 14V / 1.54W
EFI100E13DGH-COECS
Wrapper Type (concealed condenser)
FBA11J14VXA Ø 110mm. prop fan (Box Type)
NTC
B = 3850K ± 2%
NTC
MM3-20DCW
250V / 10A / 73°C
LED Lamp PCB
12V / 100mA
LED Lamp PCB
5V / 30mA
R-20 = 18.9KΩ
Micro Temp.
NR-BY601XS
Stainless
NR-BY601VS
PCM (Polyester paint coating)
Polyurethane foam (cabinet and door)
B = 3819K ± 2%
R10 = 3.899KΩ
Inverter Inverter
105 ± 5°C
61 ± 8°C
Fin Tube Type
R600a
65 ± 5g
PC : Baffle damper thermostat
Full-automatic heater defrost with Micro Controller
D3D-121 (S.P. - S.T.)
Capacity
(Total Gross Volume)
Capacity
(Total Storage Volume)
External
Dimension
Temperature Control
Defrosting
Inner Liner
Insulation
Net Weight
Width(mm)
Depth(mm)
Height(mm)
Evaporator
Condenser
Compressor
Refrigerant
Oil charge

- 6 -
3. PERFORMANCE DATA
NR-BY551 / NR-BY601
3.1 NR-BY551S (AT 32 ± 1°C)
Thermostat Dial Setting
Mean Fresh Food Compartment Temperature t3 (°C)
(°C)
(°C)
(°C)
(°C)
(°C)
(°C)
(%)
Mean Freezer Load Temperature
Vegetable Crisper Temperature
PC Door Shelf Upper Temperature
Egg Tray Temperature
PC Door Shelf Bottom Temperature
Chilled Case Temperature
Running Ratio
“ 3 ” “ 2 ” “ 1 ”
1.5 ± 2.5 4.0 ± 2.5 7.0 ± 2.5
-22.0 ± 2.5 -19.5 ± 2.5 -15.0 ± 2.5
- 4.0 ± 2.5 -
- 7.0 ± 2.5 -
- 4.0 ± 2.5 -
- 5.0 ± 2.5 -
- 0.0 ± 2.5 -
70 ± 15 60 ± 15 45 ± 15
3.2 NR-BY551V (AT 32 ± 1°C)
Thermostat Dial Setting
Mean Fresh Food Compartment Temperature t3 (°C)
(°C)
(°C)
(°C)
(°C)
(°C)
(°C)
(%)
Mean Freezer Load Temperature
Vegetable Crisper Temperature
PC Door Shelf Upper Temperature
Egg Tray Temperature
PC Door Shelf Bottom Temperature
Chilled Case Temperature
Running Ratio
“ 3 ” “ 2 ” “ 1 ”
1.5 ± 2.5 4.0 ± 2.5 7.0 ± 2.5
-22.0 ± 2.5 -19.5 ± 2.5 -15.0 ± 2.5
- 4.0 ± 2.5 -
- 7.0 ± 2.5 -
- 4.0 ± 2.5 -
- 5.0 ± 2.5 -
- 0.0 ± 2.5 -
85 ± 15 80 ± 15 65 ± 15
3.3 NR-BY601V (AT 32 ± 1°C)
Thermostat Dial Setting
Mean Fresh Food Compartment Temperature t3 (°C)
(°C)
(°C)
(°C)
(°C)
(°C)
(°C)
(%)
Mean Freezer Load Temperature
Vegetable Crisper Temperature
PC Door Shelf Upper Temperature
Egg Tray Temperature
PC Door Shelf Bottom Temperature
Chilled Case Temperature
Running Ratio
“ 3 ” “ 2 ” “ 1 ”
1.5 ± 2.5 4.0 ± 2.5 7.0 ± 2.5
-22.0 ± 2.5 -19.5 ± 2.5 -15.0 ± 2.5
- 5.0 ± 2.5 -
- 8.0 ± 2.5 -
- 5.0 ± 2.5 -
- 5.5 ± 2.5 -
- 1.5 ± 2.5 -
85 ± 15 80 ± 15 65 ± 15

- 7 -
4. SELF PROTECTING FUNCTION
4.1 Protection for IC
NR-BY551 / NR-BY601
IC order to stop compressor completely.
YES
YES
After 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
NO
YES
YES
9
7
IC cancels to stop compressor.
Normal operating?
6
After restarting, does “Stop compressor”
occure 10 times within 2 min?
5
IC cancels to stop compressor.
Normal operating?
4
After 10 min., does PCB check if IPM protect
signal is normal?
3
Does system protection cycle for 333 times?
8
IC orders to stop compressor for 10 min.
2
Does IC receive IPM protect signal?
1
• IC continues to stop compressor until 1 hour.
• IC indicates Self Diagnosing sign.
NO
• IC continues to stop compressor until 1 hour.
• IC indicates Self Diagnosing sign.
NO
• Normal operating.

- 8 -
NR-BY551 / NR-BY601
4.2 Protection for compressor locked
IC order to stop compressor completely.
YES
YES
After 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
NO
YES
8
6
7
IC cancels to stop compressor.
Normal operating?
5
After restarting, does “Stop compressor”
occure 10 times within 2 min.?
4
IC cancels to stop compressor after 10 min.
3
Does system protection cycle for 333 times?
IC orders to stop compressor for 10 min.
2
• After starting 2 sec., does IC detect
rpm < 5r/sec.?
• After starting from 2-10 sec., does PCB
detect rpm over 120r/sec.?
1
• IC continues to stop compressor until 1 hour.
• IC indicates Self Diagnosing sign.
NO
NO
• Normal operating.

- 9 -
4.3 Protection for power supply droping
NR-BY551 / NR-BY601
YES
After 1 hour.
NO
YES
YES
7
IC cancels to stop compressor.
Normal operating?
6
After restarting, does “Stop compressor”
occure 10 times within 2 min?
5
IC cancels to stop compressor.
Normal operating?
4
After 10 min., does PCB check power supply
voltage if it is > 180V AC?
3
IC orders to stop compressor for 10 min.
2
Does power supply voltage drop as condition
> 0.1 sec. and < 160V AC?
1
• IC continues to stop compressor until 1 hour.
• IC indicates Self Diagnosing sign.
NO
• IC continues to stop compressor until 1 hour.
• IC indicates Self Diagnosing sign.
NO
• Normal operating.

- 10 -
5. SELF DIAGNOSING FUNCTION
NR-BY551 / NR-BY601
When abnormalist is cased in the refrigerator, the sign is displayed on LED as below chart.
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 sec., each LED show as below.
4. “Self Diagnosing” function will be automatically
cancel after 7 min., from start operation.
How to use “Self Diagnosing” function
“Freezer Control” button
“Energy Saving” button
“Quick Freezing” button
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 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 FC fan motor Break/Lock of FC fan motor
Abnormal revolution of FC fan motor
Turn on Turn on 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