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6. Reparation Standard
6.1. REPAIRING DEVICES WHICH ARE EXCLUSIVE - USE FOR HFC-134a REFRIGERANT
1.
This refrigerator use compressor with Freol Oil. Freol Oil employed as new compressor oil for
refrigerant HFC-134a.
a.
Freol oil is characteristic of higher hyroscopicity. When moisture leaks into the refrigerating
unit, it will chemically react with the moisture and solid substance clogging the pipe will form
b.
It is also characteristic of less stability when chlorine is contain. Freol Oil will chemically
react with refrigerants containing chlorine and solid substance clogging the piping will form.
2.
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.
Important Notice :
1. Use repairing devices which are exclusive-use for HFC-134a refrigerating unit.
Do not keep the pipe open to air more than 30 minutes. Rubber caps of compressor parts
2.
should be removed just before installation. It should be finished within 30 minutes.
When pipe cleaning is so need :
From the process of removing compressor until the process of setting compressor and dryer
(just before vacuum pumping process).
When pipe cleaning is required :
From the time just after pipe cleaning is completed until the process of setting compressor and
dryer (just before vacuum pumping process).
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.
Never re-use the pipes (example : charge pipe) which were once used for repairing CFC-12
5.
refrigerant unit.
6.2. REPAIRING STANDARD OF REFRIGERATING UNIT HFC-134a
CAUSE
Compressor broken
Compressor stop
Motor winding broken
Noise up normal
Motor burning
Clogged by solid
Inside of Inlet Eva.
material
Inside of Outlet Dryer
Clogged by liquid material
Gas Leakage*
Gas Charge fault ( example : CFC-12 )
1. O Must be done
D Need to be done if compressor oil get dirty and no good quality (color changing)
If gas charge fault cause solid material form, so compressor oil can not back flow to
2.
compressor.
PART MUST BE CHANGE
COMPRESSOR
O
O
O
O
O
D
D
O
O
CAN NOT REPAIRING
-7-
DRYER
PIPE
O
O
O
D
O
D
O
D
O
D
O
O
O
O
O
O
O
O
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