Read Panasonic NR-AF162SNAE / NR-AF162SNWG Service Manual online
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.
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.
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
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
O
O
O
∆∆∆∆
O
O
O
∆∆∆∆
O
O
∆∆∆∆
O
O
O
O
O
∆∆∆∆
O
O
Clogged by solid
material
material
Inside of Inlet Eva.
Inside of Outlet Dryer
O
∆∆∆∆
O
∆∆∆∆
If gas charge fault cause solid material form, so compressor oil can not back flow to
compressor.
compressor.
Clogged by liquid material
Gas Leakage*
Gas Charge fault ( example : CFC-12 )
CAN NOT REPAIRING
O
O
O
O
-7-
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