Sealed System Repair - Kenmore 111.72695120 Service Manual

9. Sealed System Repair

Technician SRC 111 R600a SS Repair Guide
The following is in addition to or serves as a reminder of the established and prescribed
company service procedures for R600a sealed system diagnosis & repair.
1. This refrigerator contains flammable refrigerant. Follow all relative company, federal,
and local safety guidelines
2. No torch or heat gun is to be used on or near any product while charged with flammable refrigerant.
3. When the service request indicates a possible sealed system issue, the product and service
area must be tested for combustible vapor using an approved combustible gas detector prior to and during
servicing the sealed system.
4. Communicate with consumer concerning flammable refrigerant precautions
5. Do not apply power to the compressor terminals with the protective cover removed.
6. Unless a technician is certified and equipped for R600a sealed system repair, the sealed system
must be diagnosed without system entry or access.
7. All sealed system connection points (joints) must be analyzed before ordering parts to ensure that
all connections can be completed.
8. Dry-powder class C fire extinguisher is nearby and accessible
9. The service area must be well ventilated
10. The product is grounded during repair to prevent static electrical spark
11. Using proper equipment, temporarily recover the system to the deepest level possible
while shaking the compressor periodically.
12. Bring the system vacuum to atmospheric pressure using regulated dry oxygen-free nitrogen
or if leak testing is needed, pressurize up the low-side design pressure.
13. If not leak testing and system at atmospheric pressure, cut all necessary connections
using tubing cutter and cap-tube cutter.
14. Replace all needed sealed system components, leaving the filter-drier replacement for last.
15. Pressure test using oxygen-free dry nitrogen at no greater than low-side design pressure.
16. Safely expel the nitrogen from the system.
17. Complete the deep evacuation process and recharge using virgin R600a refrigerant
following the prescribed method.
18. Cap off and test access ports for leakage.
19. Add red color to access ports tubing following AHAM guideline.
20. Vent outdoors the recovered R600a refrigerant following the prescribed method.
To avoid risk of electrical shock that can cause death or severe personal injury,
WARNING
!
disconnect unit from power before servicing unless tests require power.
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