LG LRSC21934SW, Service Manual

Page: 107 / 129

3-5. Standard Regulations For Heavy Repair
TROUBLE DIAGNOSIS
- 107 -
Items Precautions
4) Refrigerant Charging
Charge refrigerant while operating a compressor as shown above.
5) Pinch a charging pipe with a pinch-off plier after completion of charging.
6) Braze the end of a pinched charging pipe with copper brazer and take a gas leakage test
on the welded parts.
6. Gas-leakage test * Take a leakage test on the welded or suspicious area with an electronic leakage tester.
7. Pipe arrangement Check each pipe is placed in its original
in each cycle place before closing a cover back-M/C
after completion of work. Particularly
control the size of Joint Drain Pipe
Compressor
Condenser
Drier
Evaporator
Bombe
1) Observe the safety precautions for gas handling.
2) Use JIG (or wet towel) in order to prevent electric wires from burning during welding. (In order to prevent insulation
break and accident.)
3) The inner case shall be melted and insulation material (polyurethane) shall be burnt if not cared during welding inner
case parts.
4) The copper pipe shall be oxidized by overheating if not cared during welding.
5) Not allow the aluminum pipes to contact to copper pipes. (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 should not be distorted while cutting a capillary tube.
8) Be sure that a suction pipe and a filling tube should not be substituted each other during welding. ( High efficiency
pump.)
12 mm
+
3
-
0
Drier
Molecular Pipe
Molecular
Sieves
+3
-0