Panasonic NR-BU303MNHK Manual de usuario

Order No. PAPTH120404CE

(Revision : Jan. 2013)

Service Manual

Refrigerator

NR-BU303MNHK

NR-BU343MNHK

NR-BU343MNX1

NR-BU303SNHK

NR-BU343SNHK

NR-BU343SNX1

Product Colour

Clear Stainless Silver (MN/S)

Champagne (SN/N)

Destination

Hong Kong, India

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.

- 2 -

CONTENT

Page

14 - 16

1. Safety Cautions for Repairing

1.1 Warning

1.2 Caution

2. Specification and Components

2.1 NR-BU303 SERIES

2.2 NR-BU343 SERIES

3. Schematic Diagram

4. Performance Data

5. Troubleshooting Guide

6. Disassembly Instruction

6.1 Led Cover

6.2 Plate Duct PCT

7. Parts Exploded View and Replacement Parts List

7.1 Part Exploded View : Body

7.2 Part Exploded View : Door

7.3 Part Exploded View : Packing

7.4 Replacement Parts List : NR-BU303 / NR-BU343

Detail Change Notice

NR-BU303 / BU343

- 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-BU303 / BU343

- 4 -

2. SPECIFICATION AND COMPONENTS

2.1 NR-BU303 SERIES

Model

Specification

Destination

Code Attached Model

Power Source

Plug

Colour Model

Colour Code

System Spec.

Material Spec.

Hong Kong

NR-BU303

EUW86E87RAW

220V, 50Hz

S3P

MN, SN

S, N

Induction

PCM = SN, Stainless = MN

Capacity

(Total Gross Volume)

External Dimension [ W x D x H ]

Internal Dimension

[ W x D x H ] PC

296L

(FC : 92L, PC : 204L)

600 x 629 x 1542 (mm.)

472.6 x 343 x 497.8 (mm.)

513.6 x 426.7 x 828 (mm.)

Installation Space Side : 50 mm min. / Back : 100 mm min. / Top : 300 mm min.

Temperature Control

Type

Rating

Radiant Heater

Full automatic temp. control equipment

PC : Control board

MM6 - 8V48

Type

Charging Amt.

Type

Charging Amt.

Type

Rating

Type

Rating

Type

Rating

Type

Rating

Type

Rating

Type

Rating

Type

Rating

Type

Rating

Defrosting Control Defrost Cycle

Inner Liner

Insulation

Net Weight

(1) Ambient temp. over 33°C, 8.5h

(2) Ambient temp. 25°C ~ 33°C, 8.5h

(3) Ambient temp. under 16°C, 16h

401405L

4 µF - 400V

5TM189MFBYY - 53

PTH7M330MD2

(4) Power on 4h (Rated time)

220V / 150W

Vacuum formed ABS resin / Cabinet and door

Cyclopentane (DSD421.21) / Cabinet and door

52 Kg

Sealed Unit

Compressor

Evaporator

Condenser

Refrigerant

Lubricating Oil

Fin and tube type

Single wall steel tube (Zinc coat)

R - 600a

55 ± 5g

Freol

-10

190 ± 5ml

MM1-6180B, Closed temp. (Normal) -1.0 ± 1.5°C

Electric Part

Door Switch

Temperature Baffle Damper

Fan Motor

Compressor Motor

PC Sensor (PCC)

Ambient Temp.

Sensor (ATC)

Defrost Thermal

Fuse

Running Capacity

Overload Protector

LED Lamp PCB / 12V, 60 mALight Irradiantion Device (PC)

Starting Relay

Defrost Sensor

(DFC)

S.P. - S.T. / D3D - 121 (Omron)

250V / 0.5A

FBA11J14VXA Prop fan (Box type)

DC 14V / 1.54W under applied fan ø90 mm.

Split phase induction motor, EQ-BR97, 220V 50Hz / 2 poles

119.3 W

NTC

B = 3808K / R0 = 6.409KΏ± 1%

NTC

B = 3819K ± 2%

R10 = 3.899KΏ± 3%

NTC

Micro Temp.

250V / 10A / 73°C

B = 3435K ± 1%

R25 = 10.0KΏ± 3%

NR-BU303 / BU343

- 5 -

2.2 NR-BU343 SERIES

Model

Specification

Destination

Code Attached Model

Power Source

Plug

Colour Model

Colour Code

System Spec.

Material Spec.

India / Hong Kong

NR-BU343

EUW91E92RAW

230V, 50Hz / 220V, 50Hz

B3P / S3P

MN, SN

S, N

Induction

PCM = SN, Stainless = MN

1N / HK

Capacity

(Total Gross Volume)

External Dimension [ W x D x H ]

Internal Dimension

[ W x D x H ] PC

342L

(FC : 92L, PC : 250L)

600 x 629 x 1722 (mm.)

472.6 x 343 x 497.8 (mm.)

513.6 x 426.7 x 1008 (mm.)

Installation Space Side : 50 mm min. / Back : 100 mm min. / Top : 300 mm min.

Temperature Control

Type

Rating

Radiant Heater

Full automatic temp. control equipment

PC : Control board

MM6 - 8V48

Type

Charging Amt.

Type

Charging Amt.

Type

Rating

Type

Rating

Type

Rating

Type

Rating

Type

Rating

Type

Rating

Type

Rating

Type

Rating

Defrosting Control Defrost Cycle

Inner Liner

Insulation

Net Weight

(1) Ambient temp. over 33°C, 8.5h

(2) Ambient temp. 25°C ~ 33°C, 8.5h

(3) Ambient temp. under 16°C, 16h

401405L

4 µF - 400V

5TM189MFBYY - 53

PTH7M330MD2

(4) Power on 4h (Rated time)

220V / 150W

Vacuum formed ABS resin / Cabinet and door

Cyclopentane (DSD421.21) / Cabinet and door

53.5 Kg

Sealed Unit

Compressor

Evaporator

Condenser

Refrigerant

Lubricating Oil

Fin and tube type

Single wall steel tube (Zinc coat)

R - 600a

55 ± 5g

Freol

-10

190 ± 5ml

MM1-6180B, Closed temp. (Normal) -1.0 ± 1.5°C

Electric Part

Door Switch

Temperature Baffle Damper

Fan Motor

Compressor Motor

PC Sensor (PCC)

Ambient Temp.

Sensor (ATC)

Defrost Thermal

Fuse

Running Capacity

Overload Protector

LED Lamp PCB / 12V, 60 mALight Irradiantion Device (PC)

Starting Relay

Defrost Sensor

(DFC)

S.P. - S.T. / D3D - 121 (Omron)

250V / 0.5A

FBA11J14VXA Prop fan (Box type)

DC 14V / 1.54W under applied fan ø90 mm.

Split phase induction motor, EQ-BR97, 220V 50Hz / 2 poles

119.1 W

NTC

B = 3808K / R0 = 6.409KΏ± 1%

NTC

B = 3819K ± 2%

R10 = 3.899KΏ± 3%

NTC

Micro Temp.

250V / 10A / 73°C

B = 3435K ± 1%

R25 = 10.0KΏ± 3%

NR-BU303 / BU343

- 6 -

3. SCHEMATIC DIAGRAM

NR-BU303 / BU343

- 7 -

NR-BU303 / BU343

4. PERFORMANCE DATA

4.1 NR-BU303 SERIES (India)

Control Setting

Mean Fresh Food Compartment Temperature

Mean Freezer Load Temperature

(°C)

(kWh / 24 hrs)

(°C)

t3 (°C)

Vegetable Case Temperature

PC Door Shelf Upper Temperature

PC Door Shelf Bottom Temperature

Power Consumption

* Under on - load and ambient temperature 32 ± 1°C

-0.5 ± 2.5 3.0 ± 2.5 8.0 ± 2.5

-29.5 ± 2.5 -20.0 ± 2.5 -9.0 ± 2.5

Running Ratio (%) 85.0 ± 15

4.0 ± 2.5

1.6 or under

35.0 ± 1555.0 ± 15

- 4.5 ± 2.5 -

6.0 ± 2.5 -

“ 3 ”PC

“ 2 ” “ 1 ”

“ 3 ” “ 2 ” “ 1 ”

4.2 NR-BU303 SERIES (Other)

Control Setting

Mean Fresh Food Compartment Temperature

Mean Freezer Load Temperature

(°C)

(kWh / 24 hrs)

(°C)

t3 (°C)

Vegetable Case Temperature

PC Door Shelf Upper Temperature

PC Door Shelf Bottom Temperature

Power Consumption

* Under on - load and ambient temperature 32 ± 1°C

-1.5 ± 2.5 3.0 ± 2.5 8.0 ± 2.5

-28.0 ± 2.5 -19.5 ± 2.5 -9.0 ± 2.5

Running Ratio (%) 85.0 ± 15

4.0 ± 2.5

1.8 or under

35.0 ± 1560.0 ± 15

- 5.0 ± 2.5 -

5.0 ± 2.5 -

“ 3 ”PC

“ 2 ” “ 1 ”

“ 3 ” “ 2 ” “ 1 ”

4.4 NR-BU343 SERIES (Other)

Control Setting

Mean Fresh Food Compartment Temperature

Mean Freezer Load Temperature

(°C)

(kWh / 24 hrs)

(°C)

t3 (°C)

Vegetable Case Temperature

PC Door Shelf Upper Temperature

PC Door Shelf Bottom Temperature

Power Consumption

* Under on - load and ambient temperature 32 ± 1°C

-1.5 ± 2.5 3.0 ± 2.5 8.0 ± 2.5

-27.0 ± 2.5 -22.0 ± 2.5 -9.0 ± 2.5

Running Ratio (%) 85.0 ± 15

4.0 ± 2.5

1.8 or under

35.0 ± 1560.0 ± 15

- 5.0 ± 2.5 -

6.0 ± 2.5 -

“ 3 ”PC

“ 2 ” “ 1 ”

“ 3 ” “ 2 ” “ 1 ”

4.3 NR-BU343 SERIES (India)

Control Setting

Mean Fresh Food Compartment Temperature

Mean Freezer Load Temperature

(°C)

(kWh / 24 hrs)

(°C)

t3 (°C)

Vegetable Case Temperature

PC Door Shelf Upper Temperature

PC Door Shelf Bottom Temperature

Power Consumption

* Under on - load and ambient temperature 32 ± 1°C

-0.5 ± 2.5 3.0 ± 2.5 8.0 ± 2.5

-28.5 ± 2.5 -23.0 ± 2.5 -9.0 ± 2.5

Running Ratio (%) 85.0 ± 15

4.0 ± 2.5

1.6 or under

35.0 ± 1560.0 ± 15

- 5.0 ± 2.5 -

6.0 ± 2.5 -

“ 3 ”PC

“ 2 ” “ 1 ”

“ 3 ” “ 2 ” “ 1 ”

- 8 -

NR-BU303 / BU343

5. TROUBLESHOOTING GUIDE

Cause : Not cool at all or not enough

Does the compressor

operating?

Does the fan motor

operating?

Check the ice at the

evaporator.

Does any oil leak out?

Plug out to stop the

compressor and

check gas spout out

by cutting cap tube

around 35 mm. from

dryer.

Check the start

control circuit.

NONO

YES

NO NO

YES

No ice

or only at the inlet

It’s very few ice

YES

Use

method

Gas spout out at both side

Gas spout out at dryer side only

Gas spout out at evaporator side only

Check pressure of the

motor compressor by

ohmmeter.

Rip/Burn coil.

Check oil color of the

compressor.

(Clean the pipe according

to guidance)

Check the fan

motor circuit.

Clogged moisture.

Gas leakage.

Check the gas

smell.

Defect compressor

Clogged in the cap

tube system at the

evaporator side.

Clogged in the cap

tube system at the

dryer side.

Cutting cap tube

out of the dryer

side.

Technical Guide

Order No.

TECH091119TG

Compressor ‘s

rotor lock.

Replace the defect of

electric part.

(Capacity, Thermostat,

PTC Relay and Protection)

Check oil color of the

compressor.

(Clean the pipe according

to guidance)

Replace the compressor.

Replace the fan motor.

Cannot repair.

Check oil color of the

compressor.

(Clean the pipe according

to guidance)

Replace the compressor.

- 9 -

6. DISASSEMBLY INSTRUCTION

6.1 Led Cover

- Take off by use small screwdriver put between gaps of Led cover with Plate duct PCT at lock as Fig. 1

- Use small screwdriver push up the Led cover for lock loose.

- Change Led lamp by take off at Lead wire connection as Fig. 2

- After change Led cover or Led lamp, put Led cover at the top side and slide up in lock position as Fig. 3

- Use hand hit carefully at the right side of Led cover from the top pass to bottom as Fig. 4

Fig. 1 Fig. 2

Fig. 3 Fig. 4

NR-BU303 / BU343

- 10 -

6.2 Plate Duct PCT

Fig. 4 Fig. 5

Fig. 1 Fig. 2 Fig. 3

- Use small screwdriver open at the screw hole cover as Fig. 1

- Take off screws at the Plate duct PCT as Fig. 2

- Take off screws at the Plate duct PCB and Plate duct PC as Fig. 3

- At first, take off at the Plate duct PC as Fig. 4

- After that take off at the Plate duct PCB and other parts as Fig. 5

NR-BU303 / BU343

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