LG LSSB2791ST Service Manual page 27

TROUBLE DIAGNOSIS
Items
6. Gas-leakage test
7. Pipe arrangement in
each cycle
1-5. Standard Regulations For Heavy Repair
1) Observe the safety precautions for gas handling.
2) Use JIG (or a wet towel) in order to prevent electric wires from burning during welding. (In order to prevent insulation
break and accident.)
3) The inner case will melt and the insulation will burn.
4) The copper piping will oxidize.
5) Do not allow aluminum and copper pipes to touch. (In order to prevent corrosion.)
6) Observe that the inserted length of a capillary tube into a drier should be 12 mm.
7) Make sure that the inner diameter is not distorted while cutting a capillary tube.
8) Be sure that the suction pipe and the filling tube should not be substituted each other during welding. (High efficiency
pump.)
Low pressure side
4) Refrigerant Charging
Charge refrigerant while operating a compressor as shown above.
5) Pinch the charging pipe with a pinch-off plier after completion of charging.
6) Braze the end of a pinched charging pipe with copper brazer and test for gas leakage at
the brazed parts.
* Test for leaks on the welded or suspicious area with an electronic leakage tester.
When replacing components, be
sure each pipe is replaced in its
original position before closing the
cover of the mechanical area.
Molecular
Sieves
Precautions
Compressor
Drain Pipe
Condenser
Drier
27
Evaporator
3 way valve
Evaporator
Hot Line
Drier
High pressure side
Molecular Pipe