Manitowoc QuietQube Indigo Series Technician's Handbook page 204

Severe System Contamination
1. Remove the refrigerant charge.
2. Remove the compressor and inspect the
refrigeration lines. If burnout deposits are found,
install a new harvest valve, replace the manifold
strainer, TXV and harvest pressure regulating
valve.
3. Wipe away any burnout deposits from suction and
discharge lines at compressor.
4. Sweep through the open system with dry
nitrogen.
Refrigerant sweeps are not recommended, as they
release CFCs into the atmosphere.
5. Install a new compressor and new start
components.
6. Install a suction line filter-drier with acid and
moisture removal capability. Place the filter drier
as close to the compressor as possible.
7. Install an access valve at the inlet of the suction
line drier.
8. Install a new liquid line drier (and suction filter on
QuietQube® condensing units).
204
Important
Part Number STH026 8/12