TROUBLE DIAGNOSIS
3-3. Precautions During Heavy Repair
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1. | Use of tools. | 1) | Use special parts and tools for R134a. |
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2. | Removal of retained | 1) | Remove retained refrigerant more than 5 minutes after turning off a refrigerator. |
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2)Remove retained refrigerant by cutting first high pressure side (drier part) with a nipper and then cut low pressure side. (If the order is not observed, oil leak will happen.)
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| Compressor |
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| Drier |
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| Condenser |
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| 1 High pressure side |
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3. | Replacement of drier. | 1) | Be sure to replace drier with R134a only when repairing pipes and injecting refrigerant. | |||||||||||||
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4. | Nitrogen blowing | 1) | Weld under nitrogen atmosphere in order to prevent oxidation inside a pipe. | |||||||||||||
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5. | Others. | 1) | Nitrogen or refrigerant R134a only should be used when cleaning inside of cycle pipes | |||||||||||||
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2)Check leakage with an electronic leakage tester.
3)Be sure to use a pipe cutter when cutting pipes.
4)Be careful not the water let intrude into the inside of the cycle.
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