LG LSC27990TT Service Manual page 81

TROUBLE DIAGNOSIS
Items
6. Gas-leakage test
7. Pipe arrangement
in each cycle
3-5. 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.
Molecular
Sieves
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.)
Compressor
Charging Canister
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.
Precautions
Hot Line
Condenser
+3
-0
Drier
Molecular Pipe
+
3
12 mm
-
0
- 81 -
Evaporator
Drier
Bushing