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TROUBLE DIAGNOSIS
3-2.
Summary
Of Heavy
Repair
Process
Contents
Tools
- Cut charging pipe ends and discharge refrigerant from
Filter, side cutters
drier and compressor.
Pipe Cutter. Gas welder, N2 gas
r
- 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 atmosphere.(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 (dder)
and low (compressor
refrigerant discharging
parts)
pressure sides,
- Evacuation
Speed:113flmin.
- Weigh and control the allowance of R134a bombe in a
vacuum conditions to be :1:5 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
_b 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.)
Vacuum pump(R134a
exclusively),
Manifold gauge.
R134a exclusive bombe(mass
cylinder), refrigerant(R134a)
manifold gauge, electronic
scales, punching off flier,
gas welding machine
Electronic Leak Detector,
Driver(Ruler).
Copper brush, Rag, Tool box
- 93 -
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