LG GR-L247ER Parts List And Instructions Manual page 71

TROUBLE DIAGNOSIS
3-2. Summary Of Heavy Repair
Process
V
V
Contents
- Cut charging pipe ends and discharge refrigerant from
drier and compressor.
- Use R134a oil and refrigerant for compressor and drier
- Confirm N2 sealing and packing conditions before use.
Use good one for welding and assembly.
- Weld under nitrogen gas atmcaphere.(N2 gas pressure:
0.1-0.2kg/cm2).
- Repair in a clean and dry place.
- Evacuate for more than forty minutes after connecting
manifold gauge hose and vacuum pump to high (drier)
and low (compressor refrigerant discharging parts)
pressure skies,
- Evacuation Speed:113,'/min.
- Weigh and control the allowance of R134a bombe in a
vacuum conditions to be ±5 g with electronic scales and
charge through compressor inlet
(Charge while refrigerator operates).
- Weld carefully after inlet pinching.
- Check leak at weld joints.
_ Minute leak: Use electronic leak detector
Big leak: Check visually or fingers.
Note:Do not use soapy water for check.
- Check cooling capacity
_ Check radiator manually to see if warm.
Check hot line pipe manually to see if warm.
® Check frost formation on the whole surface of the
evaporator.
- Remove flux from the silver weld joints with soft brush
or wet rag.(Flux may be the cause of corrosion and
leaks.)
- Clean R134a exclusive tools and store them in a clean
tool box or in their place.
- Installation should be conducted in accordance with the
standard installation procedure.(Leave space of more
than 5 cm from the wall for compressor compartment
cooling fan mounted model.)
Tools
Filter, side cutters
Pipe Cutter, Gas welder, N2 gas
Vacuum pump(R134a
exclusively), Manifold gauge.
R134a exclusive bombe(mass
cylinder), refdgerant(R134a)
manifold gaage, electronic
scales, punching off flier,
gas welding machine
Electronic Leak Detector,
Driver(Ruler).
Copper brush, Rag, Tool box
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