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