Panasonic NR-BU302SERIESNR-BU342SERIES User manual

Service Manual
Refrigerator
WARNING
This 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 with in this service information by anyone else could result in serious injury or death.
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
Product Color
Silver (S), Silver Blue (A),
White (W), Rose Stainless (N)
Destination
Hong Kong, Singapore (DBD),
Malaysia, Singapore (RBD),
Thailand, Vietnam, PGF, GULF,
India
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.
© 2009 Panasonic Home Appliances (Thailand) Co.,Ltd
All rights reserved. Unauthorized copying and distribution is
a violation of law
NR-BU302
SERIES
NR-BU342
SERIES
Order No. PHAT090503C3
(REVISION : JAN. 2010)

1. Safety Cautions for Repairing
When you repair refrigerator, please kindly take care of following cautions.
Before repairing unit, unplug supply cord
• Before you repair refrigerator, 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 parts terminal.
• When you replace the parts, please wait three minutes at least for discharging capacitor.
Check safety after repairing
• Check the screws, parts, lead wires to take in place.
• And 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.
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 adjustable bolt
• Otherwise, the floor may be damaged.
Do not touch the pipe after brazing
• Otherwise, your hands may be burnt.
a) Warning
b) Caution
2

2. Specification and Components
2.1 NR-BU302 SERIES
Destination
Plug
Power Source
Specification
Capacity
Total volume
Freezer FC
Fresh food PC
Internal
dimention
Width x Depth x Height
472.6 mm x 336 mm x 497.8 mm
510 mm x 432 mm x 829.6 mm
External dimensions
Net weight
Side : 50 mm Min, Back : 100 mm Min, Top : 300 mm MinInstallation space
Energy Label
Temperature control Full-automatic temp. Control equipment
(FC: Control board,fc operation board PC : Closed temp. (Normal), GAS charge type )
Full-automatic (Forcibly evaporated in the air)Defrosting
Exterior finish (cabinet / door)
Vacuum formed ABS resinInner liner
Insulation
Sealed Unit
Compressor DG57C96RAW5 DHS57C80RAW
Fin and tubeGroove tube
5TM181NHBYY 5TM189NFBYY 5TM718MFBYY
Evaporator
Single wall steel tube (zinc coat)Condenser
HFC-134a, 120 ± 5g 130 ± 5gRefrigerant charge
Electric Parts
Temp. baffle damper MM1-6180B, Closed temp. (normal) - 1.0 ± 1.5 C
D3D-121 (OMRON), 250V / 0.5A , Switch type S.P.-S.T.Door switch PC
Fan motor
FBA11J14VXA Rating DC14V /1.54W under Applied fan Ø90 mm. PROP FAN (Box type)
Split-phase induction motor, EQ-BR12 (12), 220V / 50Hz / 140W 2poles
E14 / 22, 250 V / 2ALamp receptacle
E14 / 22, 240 V / 15WLamp
PTC B=3850K ± 2% , R20=18.9KΩ± 1.8%FC sensor (FCC)
PTC B=3819K ± 2% , R10=3.899KΩ± 3%FC sensor (DFC)
PTC B=3435K ± 1% , R25=10.0KΩ± 3%Ambient temp. sensor (ATC)
PTH7M330MD2PTC relay
Motor protector
401405L, 400V / 4.0
µF Running capacitor
Micro temp. : 250V / 10A / 73°CTemperature fuse
Model NR-BU302 SERIES
269L
90L
206L
Malaysia
MY
SS, SA
S, A
S3P
240V, 50Hz
Sing-RBD
WA
SS, SA
S, A
C2P
220-240V, 50Hz
Hong Kong
HK
SS, SA
S, A
S3P
220V, 50Hz
Sing-DBD
SG
SS, SA
S, A
S3P
230V, 50Hz
PGF
WG
SS, SA, SW
S, A, W
C2P SHUKO
220V, 50Hz
GULF
AE
SS, SA, SW
S, A, W
S3P
220-240V, 50Hz
Thailand
TH
SS, SA, MN
S, A, N
C2P
220V, 50Hz
Vietnam
VN
SS, SA, MN
S, A, N
C2P
220-240V, 50Hz
India
1N
SS, SA
S, A
B3P
230V, 50Hz
600 mm x 615 mm x 1544 mm
SPCC-SD / Polyester Painting steel
Cyclopentane (DSD421.21) foam (shell and door)
DA57C11RAY5
55 kg 55 kg58 kg
Compressor Motor
5 Stars - Grade 1 2 Ticks - - Level 5 - 5 Stars
Contain - - - - - - - -
Lubricating oil 280±5 ml (Freol α-10)
Pipe Mullion Back
FC
PC
3
Colour Code
Colour Model
Conutry Code

2. Specification and Components
Destination
Plug
Power Source
Specification
Capacity
Total volume
Freezer FC
Fresh food PC
Internal
dimention
Width x Depth x Height
472.6 mm x 432 mm x 497.8 mm
510 mm x 336 mm x 1019.60 mm
External dimensions
Net weight
Side : 50 mm Min, Back : 100 mm Min, Top : 300 mm MinInstallation space
Energy Label
Temperature control Full-automatic temp. Control equipment
(FC: Control board,fc operation board PC : Closed temp. (Normal), GAS charge type )
Full-automatic (Forcibly evaporated in the air)Defrosting
Exterior finish (cabinet / door)
Vacuum formed ABS resinInner liner
Insulation
Sealed Unit
Compressor DG57C96RAW5 DHS57C80RAW
Fin and tubeGroove tube
5TM181NHBYY 5TM189NFBYY 5TM724MFBYY
Evaporator
Single wall steel tube (zinc coat)Condenser
HFC-134a, 130 ± 5g 140 ± 5gRefrigerant charge
Electric Parts
Temp. baffle damper MM1-6180B, Closed temp. (normal) - 1.0 ± 1.5 C
D3D-121 (OMRON), 250V / 0.5A , Switch type S.P.-S.T.Door switch PC
Fan motor
FBA11J14VXA Rating DC14V /1.54W under Applied fan Ø90 mm. PROP FAN (Box type)
Split-phase induction motor, EQ-BR12 (12), 220V / 50Hz / 140W,108W (Malaysia) 2poles
E12 / 22, 250 V / 2ALamp receptacle
E14 / 22, 240 V / 15WLamp
PTC B=3850K ± 2% , R20=18.9KΩ± 1.8%FC sensor (FCC)
PTC B=3819K ± 2% , R10=3.899KΩ± 3%FC sensor (DFC)
PTC B=3435K ± 1% , R25=10.0KΩ± 3%Ambient temp. sensor (ATC)
PTH7M330MD2
PTH7M330MC1 PTC relay
Motor protector
401405L, 400V / 4.0
µF Running capacitor
Micro temp. : 250V / 10A / 73°CTemperature fuse
Model NR-BU342 SERIES
342L
90L
252L
Malaysia
MY
SS, MN
S, N
S3P
240V, 50Hz
Sing-RBD
WA
SS
S
C2P
220-240V, 50Hz
Hong Kong
HK
SS,MN
S, N
S3P
220V, 50Hz
Sing-DBD
SG
SS, MN
S, N
S3P
230V, 50Hz
PGF
WG
SS, SW
S, W
C2P SHUKO
220V, 50Hz
GULF
AE
SS, SW
S, W
S3P
220-240V, 50Hz
Thailand
TH
SS, MN
S, N
C2P
220V, 50Hz
Vietnam
VN
SS, MN
S, N
C2P
220-240V, 50Hz
India
1N
SS
S
B3P
230V, 50Hz
600 mm x 615 mm x 1734 mm
SPCC-SD / Polyester Painting steel
Cyclopentane (DSD421.21) foam (shell and door)
DA66C12RAY5
59 kg 59 kg62 kg
Compressor Motor
5 Stars - Grade 1 2 Ticks - - Level 5 - 5 Stars
Contain - - - - - - - -
Lubricating oil 280 ml (Freol α- 10)
Pipe Mullion Back
FC
PC
4
Colour Code
Colour Model
Conutry Code
2.2 NR-BU342 SERIES

3. Schematic Diagram
3.1 NR-BU302 SERIES
5

3. Schematic Diagram
3.2 NR-BU342 SERIES
6

4. Performance Data
4.1 NR-BU302 SERIES
Control setting PC "3" "2" "1"
FC "3" "2" "1"
Mean freezer load temp. (°C) -22.0 ± 2.5 -19.0 ± 2.5 -15.0 ± 2.5
Mean fresh food compartment temp. (°C) 1.0 ± 2.5 4.0 ± 2.5 7.0 ± 2.5
51±0.5051±0.06)%(noitargninnuR
Power consumption (kWh / 24 hrs) --
Power consumption (kWh / 24 hrs) -2.0 or Under -
* Under on- load and ambient temperature 32 ˚C
Control setting PC "3" "2" "1"
FC "3" "2" "1"
Mean freezer load temp. (°C) -22.0 ± 2.5 -19.0 ± 2.5 -15.0 ± 2.5
Mean fresh food compartment temp. (°C) 1.0 ± 2.5 4.0 ± 2.5 7.0 ± 2.5
51±0.5051±0.56)%(noitargninnuR
* Under on- load and ambient temperature 32 ˚C
4.2 NR-BU342 SERIES
80.0 ± 15
80.0 ± 15
2.0 or Under
7

5. Troubleshooting Guide
Cause : Not cool at all or not enough
Does the compressor
operating?
Check the Start
Control Circuit
Check pressure of the
motor compressor by
ohmmeter.
Compressor's
rotor lock
Replace the defect
of electric part
(Capacitor, Thermostat,
PTC Relay and Protector)
Check oil color
of the compressor
Check oil color
of the compressor
Check oil color
of the compressor
Replace the fan motor
Cannot repair
Rip/Burn coil
Replace the compressor
(Clean the pipe according
to guidance)
Replace the compressor
(Clean the pipe according
to guidance)
(Clean the pipe according
to guidance)
Check the Fan
Motor circuit
Clogged moisture
NO NO
YES
YES
YES
NO
YES
It's very few ice
No ice
or only at the inlet
YES
NO
Gas spout out at both side
NO
YES
Gas spout out at dryer side only
Gas spout out at evaporator side only
Gas leakage
Cutting cap tube
out of the dryer side
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
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
8

6. Parts Location
NR-BU302 SERIES, NR-BU342 SERIES
1
2
3
7
8
8
7
7.1
99
4
5
69
11
70
13
12
14
16
17
18
19 24 25
26
23
22
21
71
27
28
31.2
31
32
31.1
33
29
41
40
39
38 37
36
35
34
44
45
46
42
33
6.2
6.1 6.3 6.4
43.1
48
47
73
43
72
10
10.1
20.1
15
20
(NR-BU342 SERIES)
NR-BU302 SERIES (FOR GULF ONLY)
(NR-BU342SS,SW)
ONLY
C2P
S3P
9
12.1
6
75
30

10
6. Parts Location
NR-BU302 SERIES, NR-BU342 SERIES
50
50.3
51
52
53
54
55
56
57
58
59
60
65
64
68
67
68
64
65
66
67
66
62
63
59
60
49
50.1
50.2
FOR NR-BU302 SERIES
( )
FOR PGF / GULF
ONLY
61
76
77
74 74