Repair of Hermetic Refrigeration Systems - Guideline
Complete repair guideline for hermetic refrigeration systems covering fault location procedures, system opening and brazing under inert gas, filter drier replacement, evacuation techniques, refrigerant handling and charging, compressor replacement, refrigerant conversions (R12, R134a, R502, R404a), moisture contamination remediation, burnt compressor motor diagnostics, and electrical fault detection for PL/DL/TL/NL/FR compressors. Includes detailed sections on soldering, LokRing connections, vacuum pump operation, and flammable refrigerant safety procedures for R600a and R290.
Table of Contents:
- General .... page 3
- Fault location .... page 4
- Replacement of thermostat .... page 5
- Replacement of electrical equipment .... page 6
- Replacement of compressor .... page 6
- Replacement of refrigerant .... page 6
- Rules for repair work .... page 8
- Opening the system .... page 8
- Brazing under an inert protective gas .... page 9
- Filter drier .... page 10
- Moisture penetration during repair .... page 11
- Preparation of compressor and electrical equipment .... page 11
- Soldering .... page 13
- LokRing® connections .... page 15
- Evacuation .... page 16
- Vacuum pump and vacuum gauge .... page 18
- Handling of refrigerants .... page 19
- Charging with refrigerant .... page 19
- Maximum refrigerant charge .... page 20
- Test .... page 20
- Leak test .... page 20
- Replacement of defective compressor .... page 21
- Preparation of components .... page 21
- Removal of charge .... page 21
- Removal of defective compressor .... page 21
- Removal of refrigerant residues .... page 21
- Removal of filter drier .... page 21
- Cleaning of solder joints and reassembly .... page 21
- From R12 to other refrigerants .... page 22
- From R12 to alternative refrigerant .... page 22
- From R12 to R134a .... page 22
- From R134a to R12 .... page 22
- From R502 to R404a .... page 22
- Systems contaminated with moisture .... page 23
- Low degree of contamination .... page 23
- High degree of contamination .... page 23
- Evacuation .... page 24
- Drying of compressor .... page 24
- Oil charge .... page 25
- Lost refrigerant charge .... page 26
- Burnt compressor motor .... page 27
- Oil acidity .... page 27
- Burnt system .... page 27
- Fault location on PL / DL / TL / NL / FR compressors .... page 28
- Fault location .... page 28
- Electrical quick check .... page 28
- Fault location - detectable faults .... page 29
- Check main and start winding .... page 29
- Check protector .... page 29
- Check relay .... page 29
- Check PTC .... page 29
- Fault location - table I .... page 30
- Fault location - table II .... page 31
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Document Details
- Format
- Pages
- 32
- Size
- 2.9 MB
- Category
- DIY & Home Improvement