Panasonic NR-AF172SNAE / NR-AF172SNWG Service Manual ▷ View online
IV. INSTALLATION
V. SCHEMATIC DIAGRAM
Do not expose the refrigerator to the direct
sunlight and keep away from heat emitting
sources.
sunlight and keep away from heat emitting
sources.
Placement, make sure that circulation of the
air where the Refrigerator should be at least
10 cm, both side 12 cm, and top 10 cm.
air where the Refrigerator should be at least
10 cm, both side 12 cm, and top 10 cm.
Make sure that the refrigerator is placed on a
hard and level surface to prevent vibration
and noise. If one of the legs does not touch
the floor, adjust the adjustable leg (Adjuster
Bolt) to stabilize it.
hard and level surface to prevent vibration
and noise. If one of the legs does not touch
the floor, adjust the adjustable leg (Adjuster
Bolt) to stabilize it.
Caution:
Adjuster Bolt
Minimum
10 cm
Back side
More than
12 cm
More than
10 cm
More than
12 cm
- 5 -
VI. WIRING DIAGRAM
VII. COOLING CIRCULATION AND MAIN COMPONENT FUNCTION
FUNCTION OF EACH COMPONENT
1. COMPRESSOR
The function is to compress refrigerant gaseous so that make the temperature and pressure high.
2. CONDENSOR
The function is to lower down the refrigerant temperature, so it is liquified with same pressure.
3. PIPE MULLION DRYER
4. DRYER
5. CAPILLARY TUBE
6. EVAPORATOR
7. SUCTION PIPE
The function is to pass the low pressure gas
to compressor.
to compressor.
The function is to prevent from sweating.
It is contain silica gel and soft filter. The
dryer
dryer
collect
moisture
and
dust
in
the
refrigerant cycle, so that capillary tube will
not clogged up.
not clogged up.
The function is to reduce the pressure of
liquid
liquid
refrigerant
so
that
make
the
temperature of refrigerant low.
The function is to store cold air to refrigerator
so the refrigerant change phase become
gaseous with low pressure .
so the refrigerant change phase become
gaseous with low pressure .
NR-AF172SNWG
NR-AF172SNAE
-6-
VIII. REPAIRING DEVICES WHICH ARE EXCLUSIVE - USE FOR HFC-134a REFRIGERANT
1.
a.
b.
2.
Important Notice:
1. Use repairing devices which are exclusive-use for HFC-134a refrigerating unit.
2.
When pipe cleaning is so need:
When pipe cleaning is required:
3. Never use blowing agent containing chlorine.
CFC-12, CFC-113, HCFC-22, HCFC-141b, R-502
4. Be sure to use dryer which is exclusive - use HFC-134a.
Otherwise refrigerant HFC-134a will chemically decompose.
5.
IX. REPAIRING STANDARD OF REFRIGERATING UNIT HFC-134a
1.
O
Must be done
∆
Need to done if Compressor Oil dirty and Quality no good (color changed)
2. If gas charge fault cause solid material form, so compressor oil can not back flow to
compressor.
Clogged by liquid material
Gas Leakage*
Gas Charge fault ( example : CFC-12 )
CAN NOT REPAIRING
O
O
O
O
Clogged by solid
material
material
Inside of Inlet Eva.
Inside of Outlet Dryer
O
∆∆∆∆
O
∆∆∆∆
O
O
O
∆∆∆∆
O
O
O
∆∆∆∆
O
O
∆∆∆∆
O
O
O
O
O
∆∆∆∆
O
O
C
O
M
P
R
E
S
S
O
R
F
A
U
L
T
CAUSE
Compressor broken
Compressor stop
Motor winding broken
Noise up normal
Motor burning
Never re-use the pipes (example: charge pipe) which were once used for repairing CFC-
12 refrigerant unit.
12 refrigerant unit.
PART MUST BE CHANGE
PIPA
DRYER
COMPRESSOR
This refrigerator use Compressor with Ester Oil. Ester Oil employed as new compressor oil
for refrigerant HFC-134a.
for refrigerant HFC-134a.
Ester Oil is characteristic of higher hygroscopicity. When moisture leaks into the
refrigerating unit, it will chemically react with the moisture and solid substance clogging
the pipe will form.
refrigerating unit, it will chemically react with the moisture and solid substance clogging
the pipe will form.
It is also characteristic of less stability when chlorine is contain. Ester oil will chemically
react with refrigerants containing chlorine and solid substance clogging the piping will
form.
react with refrigerants containing chlorine and solid substance clogging the piping will
form.
From the time just after pipe cleaning is completed until the process of setting compressor
and dryer (just before vacuum pumping process).
and dryer (just before vacuum pumping process).
Since refrigerant HFC-134a has higher degree of swelling to the resin, charge hose and
packing should be made from good materials. Therefor when HFC-134a refrigerating unit,
repairing method and repairing devices axcept for vacuum pump are different from
conventional method and devices. This is to avoid mixture of different refrigerants and
mixture of different oil.
packing should be made from good materials. Therefor when HFC-134a refrigerating unit,
repairing method and repairing devices axcept for vacuum pump are different from
conventional method and devices. This is to avoid mixture of different refrigerants and
mixture of different oil.
From the process of removing compressor until the process of setting compressor and dryer
(just before vacuum pumping process).
(just before vacuum pumping process).
Do not keep the pipe open to air more than 30 minutes. Rubber caps of compressor parts
should be removed just before installation. It should be finished within 30 minutes.
should be removed just before installation. It should be finished within 30 minutes.
-7-
Caution:
-
-
1.
2.
3.
X. TOOL FOR REPAIRING REFRIGERATING UNIT HFC-134a
When the fitting for CFC-12 use is connected with the charge pipe (yellow), and then turn
the switch to CFC-12 use, the adaptor can be used for vacuum pumping of CFC-12
refrigeratirng unit.
the switch to CFC-12 use, the adaptor can be used for vacuum pumping of CFC-12
refrigeratirng unit.
Be sure connect the adaptor with vacuum pump, so it that the vacuum pump can be used
for both CFC-12 and HFC-134a.
for both CFC-12 and HFC-134a.
Since the inside of manifold gauge and charge hoses are vacuum state after vacuum
pumping, the oil of vacuum pumping may flow into HFC-134a refrigerant unit. The adaptor
prevents the oil from flowing into the refrigerating unit.
pumping, the oil of vacuum pumping may flow into HFC-134a refrigerant unit. The adaptor
prevents the oil from flowing into the refrigerating unit.
Before running the vacuum pump, connect the charge pipe (yellow) with the fitting for HFC-
1354a use, and then turn the switch to HFC-134a use.
1354a use, and then turn the switch to HFC-134a use.
Conventional repairing devices for CFC-12 can not connect with repairing devices for HFC-
134A. Because the shape of fitting for HFC-134A (M10 x P1.5 mm) is different from
conventional ones.
134A. Because the shape of fitting for HFC-134A (M10 x P1.5 mm) is different from
conventional ones.
Coupler Plug ( High Pressure Side ) 4mm
Coupler Socket
Coupler Plug ( Low Pressure Side ) 6.33 / 8mm
Process-Tube-Fitting
( 6.35 mm )
( 6.35 mm )
Process-Tube-Fitting
( 4 mm )
( 4 mm )
Charge Adaptor
Charge Cylinder
Blue
Yellow
Adaptor
Red
Manifol Gauge
Control Valve
Charge Hose
Vacuum Pump
(for CFC-12/HFC-134a)
Fitting for Vacuum Pump
Fitting for
CFC-12
Switch
( CFC-12 / HFC-134a )
Fitting for
HFC-134a
-8-
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