–191–
SEVERE SYSTEM CONTAMINATION
1. Remove the refrigerant charge.
2. Remove the compressor.
3. Cut copper tubing at the outlet of the cool vapor
valve. If burnout deposits are found inside the
tubing, replace the cool vapor valve, TXV and head
pressure control valve.
4. Wipe away any burnout deposits from suction and
discharge lines at compressor.
5. Sweep through the open system with dry nitrogen.
6. Install a new compressor and new start
components.
7. Replace existing suction line filter-drier in front of
accumulator.
8. Install a new liquid line drier.
Refrigerant sweeps are not recommended, as they
release CFCs into the atmosphere.
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