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

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

15 - 16

23 - 24

24 - 25

29 - 32

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

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

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)

(%)

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)

(%)

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)

(%)

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

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

YES

IC cancels to stop compressor.

Normal operating?

After restarting, does “Stop compressor”

occure 10 times within 2 min?

IC cancels to stop compressor.

Normal operating?

After 10 min., does PCB check if IPM protect

signal is normal?

Does system protection cycle for 333 times?

IC orders to stop compressor for 10 min.

Does IC receive IPM protect signal?

• 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.

• Normal operating.

- 8 -

NR-BY551 / NR-BY601

4.2 Protection for compressor locked

IC order to stop compressor completely.

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

YES

IC cancels to stop compressor.

Normal operating?

After restarting, does “Stop compressor”

occure 10 times within 2 min.?

IC cancels to stop compressor after 10 min.

Does system protection cycle for 333 times?

IC orders to stop compressor for 10 min.

• After starting 2 sec., does IC detect

rpm < 5r/sec.?

• After starting from 2-10 sec., does PCB

detect rpm over 120r/sec.?

• IC continues to stop compressor until 1 hour.

• IC indicates Self Diagnosing sign.

• Normal operating.

- 9 -

4.3 Protection for power supply droping

NR-BY551 / NR-BY601

YES

After 1 hour.

YES

IC cancels to stop compressor.

Normal operating?

After restarting, does “Stop compressor”

occure 10 times within 2 min?

IC cancels to stop compressor.

Normal operating?

After 10 min., does PCB check power supply

voltage if it is > 180V AC?

IC orders to stop compressor for 10 min.

Does power supply voltage drop as condition

> 0.1 sec. and < 160V AC?

• 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.

• 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

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